A high-temperature thermochemical conversion-based heat storage integration system

Abstract

The application provides a heat storage integrated system based on high-temperature thermochemical conversion, which realizes energy cascade utilization of a large amount of solid waste thermochemical conversion process through a carrier gas circulation and a heat storage particle cooperative system, and a high-temperature heat storage device. The system stores the waste heat and the heat energy converted by the renewable energy by using the heat storage particles, releases high-temperature heat during the reaction, significantly improves the green energy utilization efficiency, and realizes zero carbon emission. The multi-stage heat exchange setting improves the energy utilization efficiency, and the waste disposal realizes energy self-sufficiency. The system can be expanded to high-temperature industrial processes such as cement firing and carbonate decomposition, and a stable heat source is provided through the heat storage device, fuel consumption is reduced, temperature control accuracy is improved, waste heat is recovered, and heat pollution is reduced, thereby providing an efficient solution for low-carbon transformation of high-energy-consuming industries.

Description

Technical Field

[0001] This application relates to the field of high-temperature industrial technology, and more specifically, to a thermal storage integrated system based on high-temperature thermochemical conversion. Background Technology

[0002] The treatment of bulk solid waste, high-temperature industrial processes, cement clinker calcination, and carbonate decomposition all involve chemical reactions or energy conversions under high-temperature conditions. In the field of solid waste treatment, thermochemical conversion technologies (such as gasification and pyrolysis) can convert coal gangue, biomass, and other materials into high-value-added products, but these require a high-temperature environment to maintain the reaction. High-temperature processes in industries such as metallurgy and chemicals (such as ironmaking and metal smelting) also rely on high temperatures to achieve material melting and conversion. Clinker calcination in cement production needs to be completed in rotary kilns above 1400℃, while carbonate decomposition also requires a high-temperature environment of 800℃~900℃. Currently, the heat supply for these processes mainly relies on the combustion of fossil fuels such as coal and natural gas to meet the continuous high-temperature demands.

[0003] Currently, the high-temperature dependence of the aforementioned high-temperature industrial processes leads to serious energy and environmental problems. On the one hand, the combustion of fossil fuels not only increases production costs but also emits large amounts of greenhouse gases such as CO2, exacerbating climate change. On the other hand, high-temperature reaction systems suffer from significant heat loss, resulting in low energy efficiency. In particular, the economic viability of large-scale solid waste thermochemical conversion is constrained by the cost of external energy supply, limiting its large-scale application. Summary of the Invention

[0004] To address the aforementioned issues, this invention provides a thermal energy storage integrated system based on high-temperature thermochemical conversion. Through a carrier gas circulation and thermal energy storage particle synergy system, combined with a high-temperature thermal energy storage device, it achieves cascaded energy utilization in the thermochemical conversion process of bulk solid waste. The system utilizes the thermal energy storage particles to store waste heat and thermal energy converted from renewable energy, releasing high-temperature heat during the reaction, significantly improving green energy utilization efficiency and achieving zero carbon emissions. Multi-stage heat exchange settings enhance energy utilization efficiency, enabling energy self-sufficiency in waste treatment. This system can be extended to high-temperature industrial processes such as cement production and carbonate decomposition, providing a stable heat source through the thermal energy storage device, reducing fuel consumption and improving temperature control accuracy, while simultaneously recovering waste heat to reduce thermal pollution, providing an efficient solution for the low-carbon transformation of energy-intensive industries.

[0005] In a first aspect, the present invention provides a thermal energy storage integrated system based on high-temperature thermochemical conversion, the system comprising:

[0006] Gas transmission device (1), heat storage device (10), heating device (20) and reaction device (21);

[0007] The gas supply device (1) includes a first gas supply pipe (2) and a second gas supply pipe (3). The first gas supply pipe (2) is connected to the heating device (20), and the second gas supply pipe (3) is connected to the heat storage device (10).

[0008] The gas delivery device (1) is configured to deliver a first carrier gas to the heating device (20) through the first gas delivery pipe (2), and / or the gas delivery device (1) is configured to deliver the first carrier gas to the heat storage device (10) through the second gas delivery pipe (3).

[0009] The heating device (20) is connected to the heat storage device (10). The heating device (20) is configured to heat the first carrier gas to obtain the second carrier gas and deliver the second carrier gas to the heat storage device (10).

[0010] The heat storage device (10) stores heat storage particles. The heat storage device (10) uses the second carrier gas to heat the heat storage particles to form a first high-temperature heat storage particle. The first high-temperature heat storage particle heats the first carrier gas that enters it to obtain a third carrier gas.

[0011] The reaction device (21) is internally connected to the heat storage device (10). The reaction device (21) is configured to receive the third carrier gas and decompose solid waste by means of the heat carried by the third carrier gas to obtain decomposition products. The third carrier gas releases heat to form a fourth carrier gas.

[0012] Optionally, the heat storage device (10) includes a first heat storage tank (11) and a second heat storage tank (15), wherein the heat storage particles are stored in both the first heat storage tank (11) and the second heat storage tank (15).

[0013] The first heat storage tank (11) and the second heat storage tank (15) are respectively provided with heat release ports (12), and the heat release ports (12) are respectively connected to the inside of the reaction device (21);

[0014] The gas delivery device (1) is internally connected to the first heat storage tank (11) and / or the second heat storage tank (15), and the heating device (20) is internally connected to the first heat storage tank (11) and / or the second heat storage tank (15).

[0015] The gas delivery device (1) is configured to deliver the first carrier gas to the first heat storage tank (11) and / or the second heat storage tank (15);

[0016] The heating device (20) is configured to deliver the second carrier gas to the first heat storage tank (11) and / or the second heat storage tank (15);

[0017] The first heat storage tank (11) and the second heat storage tank (15) are configured to deliver the third carrier gas to the reaction device (21) through the heat release port (12).

[0018] Optionally, the outer walls of the first heat storage tank (11) and the second heat storage tank (15) are provided with a heat insulation layer (16).

[0019] Optionally, the system further includes an exhaust gas recovery device (48);

[0020] The first heat storage tank (11) and the second heat storage tank (15) are provided with exhaust ports (17), and the exhaust ports (17) are connected to the exhaust gas recovery device (48);

[0021] The exhaust gas recovery device (48) is configured to recover the carrier gas discharged from the first heat storage tank (11) and the second heat storage tank (15).

[0022] Optionally, the reaction device (21) includes a thermal conversion furnace (22), the inlet of which is connected to the heat storage device (10), and a cooler (23) is provided on the connecting pipe at the outlet of the thermal conversion furnace (22);

[0023] The thermal conversion furnace (22) is configured to receive the third carrier gas delivered by the heat storage device (10), decompose the solid waste by means of the heat carried by the third carrier gas, and deliver the obtained decomposition products to the cooler (23).

[0024] The cooler (23) is configured to cool the decomposition products before discharging them.

[0025] Optionally, the cooler (23) is provided with an air inlet (24), and an air conveyor (25) is provided on the connecting pipe of the air inlet (24);

[0026] The gas delivery unit (25) is configured to deliver a first carrier gas with a temperature below 50°C into the cooler (23);

[0027] The cooler (23) is also configured to exchange heat between the first carrier gas with a temperature below 50°C and the decomposition products, recover the heat carried by the decomposition products, and heat the first carrier gas with a temperature below 50°C to obtain a fifth carrier gas.

[0028] Optionally, the cooler (23) is provided with an air outlet (26), and a dust removal device (27) is provided on the connecting pipe of the air outlet (26). The end of the dust removal device (27) away from the cooler (23) is connected to the inside of the first heat storage tank (11) and / or the second heat storage tank (15).

[0029] The dust removal device (27) is configured to perform dust removal treatment on the fifth carrier gas and to transport the dust-removed fifth carrier gas to the first heat storage tank (11) and / or the second heat storage tank (15);

[0030] The first heat storage tank (11) and the second heat storage tank (15) are also configured to recover the heat carried by the fifth carrier gas after dust removal using the heat storage particles.

[0031] Optionally, the system further includes a preheating device (43);

[0032] The preheating device (43) includes a discharge port (44) and an air supply port (46);

[0033] The discharge port (44) is connected to the reaction device (21) via a conveying pipe (45), and the gas inlet (46) is connected to the interior of the reaction device (21);

[0034] The reaction device (21) is also configured to deliver the fourth carrier gas to the preheating device (43);

[0035] The preheating device (43) is configured to preheat the solid waste entering it using the fourth carrier gas, and to transport the preheated solid waste to the reaction device (21) along the conveying pipe (45), wherein the fourth carrier gas releases heat to form a sixth carrier gas.

[0036] Optionally, the heat storage device (10) includes a first heat storage tank (11) and a second heat storage tank (15);

[0037] A dust collector (47) is installed on the connecting pipe of the air outlet of the preheating device (43). The end of the dust collector (47) away from the preheating device (43) is connected to the interior of the first heat storage tank (11) and / or the second heat storage tank (15).

[0038] The dust collector (47) is configured to receive the sixth carrier gas and perform dust removal treatment, and to deliver the dust-removed sixth carrier gas to the first heat storage tank (11) and / or the second heat storage tank (15);

[0039] The first heat storage tank (11) and the second heat storage tank (15) are also configured to exchange heat between the heat storage particles and the sixth carrier gas after dust removal, and to recover the remaining heat of the sixth carrier gas after dust removal.

[0040] Optionally, the gas delivery device (1) includes a fan (5) and a plurality of valves (8);

[0041] The first gas pipe (2) and the second gas pipe (3) are respectively connected to the fan (5), and the heat storage device (10) is provided with a gas transmission pipe (9). The valves (8) are respectively provided on the first gas pipe (2), the second gas pipe (3) and the gas transmission pipe (9).

[0042] The valve (8) is configured such that when the first gas supply pipe (2) supplies the first carrier gas, the valve (8) on the first gas supply pipe (2) is in an open state, the valve (8) on the second gas supply pipe (3) is in a closed state, and the opening and closing state of the valve (8) on the gas supply pipeline (9) is the same as the opening and closing state of the valve (8) on the first gas supply pipe (2).

[0043] When the first carrier gas is delivered through the second gas delivery pipe (3), the valve (8) on the first gas delivery pipe (2) is closed, and the valve (8) on the second gas delivery pipe (3) is open.

[0044] Secondly, the present invention provides a thermal energy storage integrated system based on high-temperature thermochemical conversion, the system comprising:

[0045] Gas transmission device (1), heat storage device (10), heating device (20) and reaction device (21);

[0046] The gas supply device (1) is connected to the heating device (20) via a first gas supply pipe (2), the gas supply device (1) is connected to the heat storage device (10) via a second gas supply pipe (3), the heat storage device (10) is internally connected to the heating device (20), the heat storage device (10) is connected to the reaction device (21) via a third gas supply pipe (4), and the heat storage device (10) stores heat storage particles.

[0047] The gas delivery device (1) is configured to deliver a first carrier gas to the heating device (20) through the first gas delivery pipe (2), and / or deliver the first carrier gas to the heat storage device (10) through the second gas delivery pipe (3);

[0048] The heating device (20) is configured to heat the first carrier gas delivered by the first gas pipe (2) to 1500-1600°C to obtain a second carrier gas, and to deliver the second carrier gas to the heat storage device (10).

[0049] The heat storage device (10) is configured to heat the heat storage particles using the heat carried by the second carrier gas, and to heat the first carrier gas delivered by the second gas pipe (3) using the heated heat storage particles to obtain a third carrier gas.

[0050] The reaction device (21) is configured to receive the third carrier gas through the third gas pipe (4), utilize the heat carried by the third carrier gas to carry out a high-temperature industrial process, and cool the third carrier gas to form a fourth carrier gas.

[0051] The high-temperature industrial process includes blast furnace ironmaking or non-ferrous metal smelting.

[0052] Optionally, the gas delivery device (1) includes a fan (5) and a plurality of valves (8);

[0053] The fan (5) includes a first air supply end (6) and a second air supply end (7). The end of the first air supply pipe (2) away from the heating device (20) is connected to the first air supply end (6), and the end of the second air supply pipe (3) away from the heat storage device (10) is connected to the second air supply end (7). The valves (8) are respectively installed on the first air supply pipe (2) and the second air supply pipe (3).

[0054] The valve (8) is configured such that when the first gas supply pipe (2) supplies the first carrier gas, the valve (8) on the first gas supply pipe (2) is in an open state, and the valve (8) on the second gas supply pipe (3) is in a closed state.

[0055] When the first carrier gas is delivered through the second gas delivery pipe (3), the valve (8) on the first gas delivery pipe (2) is closed, and the valve (8) on the second gas delivery pipe (3) is open.

[0056] Optionally, the heat storage device (10) includes at least one first heat storage tank (11);

[0057] Each of the first thermal storage tanks (11) includes a first inlet (13) and a first outlet (14);

[0058] The end of the second gas pipe (3) away from the gas delivery device (1) is connected to the first inlet (13), and the end of the third gas pipe (4) away from the reaction device (21) is connected to the first outlet (14).

[0059] The heating device (20) is in internal communication with at least one of the first heat storage tanks (11), and the heating device (20) is configured to deliver the second carrier gas into at least one of the first heat storage tanks (11).

[0060] Optionally, the reaction device (21) is provided with a tail gas recovery pipe (31);

[0061] The heat storage device (10) is provided with a tail gas recovery port (18), and the end of the tail gas recovery pipe (31) away from the reaction device (21) is connected to the tail gas recovery port (18).

[0062] The heat storage device (10) is also configured to receive the fourth carrier gas output from the reaction device (21) delivered by the tail gas recovery pipe (31), use the fourth carrier gas to heat the heat storage particles, and recover the residual heat of the fourth carrier gas.

[0063] Optionally, the heat storage device (10) includes two first heat storage tanks (11), each of which stores the heat storage particles;

[0064] Each of the first heat storage tanks (11) is provided with a tail gas recovery port (18), and the end of the tail gas recovery pipe (31) away from the reaction device (21) is connected to the tail gas recovery ports (18) on the two first heat storage tanks (11) respectively; a throttling valve (32) is provided on the connecting pipe between the tail gas recovery pipe (31) and the two tail gas recovery ports (18);

[0065] The exhaust gas recovery pipe (31) is configured to deliver the fourth carrier gas to at least one of the first heat storage tanks (11) so that the fourth carrier gas heats the heat storage particles in at least one of the first heat storage tanks (11).

[0066] The throttle valve (32) is configured to open when the fourth carrier gas is delivered into the first heat storage tank (11) through the exhaust gas recovery pipe (31).

[0067] Optionally, a dust removal device (27) is provided on the exhaust gas recovery pipe (31);

[0068] The dust removal device (27) is configured to remove dust from the fourth carrier gas output by the reaction device (21), and the gas after dust removal is transported through the tail gas recovery pipe (31).

[0069] Optionally, a negative pressure fan (33) is provided on the exhaust gas recovery pipe (31) between the dust removal device (27) and the heat storage device (10);

[0070] The air inlet of the negative pressure fan (33) is connected to the exhaust gas recovery pipe (31) on the side near the dust removal device (27), and the air outlet is connected to the exhaust gas recovery pipe (31) on the side near the heat storage device (10).

[0071] The negative pressure fan (33) is configured to blow the dust-removed gas through the exhaust gas recovery pipe (31) into the heat storage device (10).

[0072] Optionally, the system further includes an exhaust gas recovery device (48);

[0073] The exhaust gas recovery device (48) is internally connected to the heat storage device (10);

[0074] The exhaust gas recovery device (48) is configured to recover the carrier gas discharged from the heat storage device (10) that has been cooled to below 50°C.

[0075] Optionally, the reaction device (21) is configured to receive the third carrier gas through the third gas pipe (4) and use the heat carried by the third carrier gas to carry out a high-temperature industrial process, wherein the high-temperature industrial process is a blast furnace ironmaking process.

[0076] The reaction apparatus (21) includes a furnace body (34);

[0077] The furnace body (34) is provided with an air inlet (24), a feed inlet (35) and a discharge outlet (44);

[0078] The air inlet (24) is connected to the end of the third air pipe (4) away from the heat storage device (10);

[0079] The air inlet (24) is configured to allow the third carrier gas to enter the furnace body (34);

[0080] The feed inlet (35) is configured to feed iron ore, coke and limestone into the furnace body (34);

[0081] The furnace body (34) is configured to utilize the high-temperature environment provided by the third carrier gas to burn the coke, obtain carbon monoxide, and cause the iron ore to undergo a reduction reaction with the carbon monoxide to obtain molten iron;

[0082] The discharge port (44) is configured to discharge the molten iron.

[0083] Optionally, the reaction device (21) is configured to receive the third carrier gas through the third gas pipe (4) and use the heat carried by the third carrier gas to carry out a high-temperature industrial process, wherein the high-temperature industrial process is a non-ferrous metal smelting process.

[0084] The reaction device (21) includes a smelting furnace (36) and a spray gun (37);

[0085] The input end of the spray gun (37) is connected to the end of the third gas pipe (4) away from the heat storage device (10), and the output end is connected to the inside of the smelting furnace (36);

[0086] The inlet (361) of the smelting furnace (36) is configured to deliver copper concentrate into the smelting furnace (36);

[0087] The spray gun (37) is configured to inject the third carrier gas into the copper concentrate to form a stirred fluid;

[0088] The smelting furnace (36) is configured to smelt the copper concentrate using the heat carried by the stirring fluid formed by the third carrier gas to obtain matte, and a mixture of metal and slag.

[0089] The outlet (362) of the smelting furnace (36) is configured to discharge matte, as well as a mixture of metal and slag.

[0090] Thirdly, the present invention provides a thermal energy storage integrated system based on high-temperature thermochemical conversion, the system comprising:

[0091] Gas transmission device (1), heat storage device (10), heating device (20), reaction device (21) and waste heat recovery device (49);

[0092] The gas supply device (1) includes a first gas supply pipe (2) and a second gas supply pipe (3). The first gas supply pipe (2) is connected to the heating device (20), and the second gas supply pipe (3) is connected to the heat storage device (10).

[0093] The gas delivery device (1) is used to deliver the first carrier gas to the heating device (20) through the first gas delivery pipe (2), or the gas delivery device (1) is used to deliver the first carrier gas to the heat storage device (10) through the second gas delivery pipe (3).

[0094] The heating device (20) is connected to the heat storage device (10), and the heating device (20) is used to heat the first carrier gas to obtain the second carrier gas;

[0095] The heat storage device (10) stores heat storage particles, and the heat storage device (10) uses the second carrier gas to heat the heat storage particles to form a first high-temperature heat storage particle;

[0096] The heat storage device (10) is also used to heat the first carrier gas that enters it using the first high-temperature heat storage particles to obtain a third carrier gas;

[0097] The reaction device (21) is internally connected to the heat storage device (10). The reaction device (21) is used to receive the third carrier gas and use the heat carried by the third carrier gas to burn cement raw materials to obtain cement clinker. The third carrier gas releases heat to form a fourth carrier gas.

[0098] The waste heat recovery device (49) is internally connected to the reaction device (21). The waste heat recovery device (49) stores the heat storage particles. The waste heat recovery device (49) is used to receive the fourth carrier gas and recover the heat carried by the fourth carrier gas using the heat storage particles.

[0099] Optionally, the system further includes a preheating device (43);

[0100] The preheating device (43) is connected to the reaction device (21) and the waste heat recovery device (49) respectively;

[0101] The preheating device (43) is used to receive the fourth carrier gas, preheat the cement raw material entering it with the fourth carrier gas, and transport the preheated cement raw material to the reaction device (21), and the fourth carrier gas is cooled to form the fifth carrier gas.

[0102] The waste heat recovery device (49) is used to receive the fifth carrier gas and recover the heat carried by the fifth carrier gas using the heat storage particles.

[0103] Optionally, the system further includes a dust removal device (27);

[0104] The dust removal device (27) includes an input end (28), a first output end (29), and a second output end (30). The input end (28) is connected to the interior of the preheating device (43) through a pipe. The first output end (29) is connected to the waste heat recovery device (49). The second output end (30) is connected to the interior of the preheating device (43).

[0105] The dust removal device (27) is used to remove dust from the received fifth carrier gas, transport the dust-removed fifth carrier gas to the waste heat recovery device (49), and return the dust to the preheating device (43).

[0106] Optionally, the system further includes an exhaust gas recovery device (48);

[0107] The exhaust gas recovery device (48) and the exhaust gas outlet (50) provided on the waste heat recovery device (49) are connected by a pipeline;

[0108] The exhaust gas recovery device (48) is used to receive the fifth carrier gas after heat recovery discharged from the exhaust gas outlet (50).

[0109] Optionally, the waste heat recovery device (49) includes a waste heat storage tank (51) and a recovery pipeline (52);

[0110] One end of the recovery pipe (52) is connected to the first output end (29) of the dust removal device (27), and the other end is connected to the waste heat storage tank (51);

[0111] The recovery pipeline (52) is used to transport the fifth carrier gas after dust removal to the waste heat storage tank (51);

[0112] The waste heat storage tank (51) is used to receive the fifth carrier gas after dust removal and to recover the heat carried by the fifth carrier gas after dust removal using the heat storage particles.

[0113] Optionally, the heat storage device (10) includes a first heat storage tank (11) and a tail gas recovery pipe (31);

[0114] The exhaust gas recovery pipe (31) is connected to the first heat storage tank (11) and the recovery pipe (52) respectively;

[0115] The first heat storage tank (11) is connected to the heating device (20) and the reaction device (21) respectively. The tail gas recovery pipe (31) is used to receive the fifth carrier gas after dust removal transported by the recovery pipe (52).

[0116] The first heat storage tank (11) is used to enable the heat storage particles to recover the heat carried by the fifth carrier gas after dust removal.

[0117] Optionally, a shut-off valve (311) is provided on the connecting pipe between the exhaust gas recovery pipe (31) and the recovery pipe (52);

[0118] The shut-off valve (311) is used to open when the temperature of the first heat storage tank (11) is below 500°C.

[0119] Optionally, the gas delivery device (1) includes a fan (5) and a plurality of valves (8);

[0120] The first gas pipe (2) and the second gas pipe (3) are respectively connected to the fan (5), and the heat storage device (10) is provided with a gas transmission pipe (9). The valves (8) are respectively provided on the first gas pipe (2), the second gas pipe (3) and the gas transmission pipe (9).

[0121] The valve (8) on the first gas pipeline (2) is used to open when the temperature of the heat storage device (10) is below 1400°C. The opening and closing state of the valve (8) on the gas delivery pipeline (9) is consistent with the opening and closing state of the valve (8) on the first gas pipeline (2).

[0122] The valve (8) on the second gas pipeline (3) is used to open when the temperature of the heat storage device (10) is higher than 1500°C.

[0123] Optionally, a valve (8) is also provided on the connecting pipe between the heat storage device (10) and the reaction device (21);

[0124] The valve (8) on the connecting pipe between the heat storage device (10) and the reaction device (21) is used to close when the temperature of the heat storage device (10) is below 1400°C and to open when the temperature of the heat storage device (10) is above 1500°C.

[0125] Optionally, the heat storage particles are selected from one of white corundum, quartz sand, alumina, magnesium oxide, zirconium oxide, carbon particles, and silicon carbide.

[0126] Fourthly, the present invention provides a thermal energy storage integrated system based on high-temperature thermochemical conversion, the system comprising:

[0127] Gas transmission device (1), heat storage device (10), heating device (20) and reaction device (21);

[0128] The gas delivery device (1) is connected to the interior of the heating device (20) and the heat storage device (10) respectively, and the gas delivery device (1) is configured to deliver a first carrier gas to the heating device (20) and / or the heat storage device (10);

[0129] The heating device (20) is internally connected to the heat storage device (10). The heating device (20) is configured to heat the first carrier gas entering it, obtain the second carrier gas, and deliver the second carrier gas to the heat storage device (10).

[0130] The heat storage device (10) stores heat storage particles inside, and the heat release end of the heat storage device (10) is connected to the inside of the reaction device (21).

[0131] The heat storage device (10) is configured such that after the second carrier gas exchanges heat with the heat storage particles, the heat storage particles are heated to form a high-temperature heat source.

[0132] The heat storage device (10) is also configured to use the high-temperature heat source to heat the first carrier gas entering it, obtain a third carrier gas, and deliver the third carrier gas to the reaction device (21);

[0133] The reaction apparatus (21) is configured to absorb the heat carried by the third carrier gas with carbonate to carry out a thermal decomposition reaction, thereby obtaining decomposition products and carbon dioxide.

[0134] Optionally, the heat storage device (10) includes a first heat storage tank (11) and a second heat storage tank (15), wherein the heat storage particles are stored in both the first heat storage tank (11) and the second heat storage tank (15).

[0135] The first heat storage tank (11) and the second heat storage tank (15) are respectively provided with heat release ports (12), and the heat release ports (12) are respectively connected to the inside of the reaction device (21);

[0136] The gas delivery device (1) is connected to the interior of the first heat storage tank (11) and the second heat storage tank (15) respectively; the heating device (20) is connected to the interior of the first heat storage tank (11) and the second heat storage tank (15) respectively;

[0137] The gas delivery device (1) is configured to deliver the first carrier gas to the first heat storage tank (11) and the second heat storage tank (15) respectively; the heating device (20) is configured to deliver the second carrier gas to the first heat storage tank (11) and the second heat storage tank (15) respectively.

[0138] Optionally, the heat storage particles are selected from one of white corundum, quartz sand, alumina, magnesium oxide, zirconium oxide, carbon particles, and silicon carbide.

[0139] Optionally, the gas delivery device (1) includes a fan (5) and a plurality of valves (8);

[0140] The air outlet of the fan (5) is connected to a first air supply pipe (2) and a second air supply pipe (3). The end of the first air supply pipe (2) away from the fan (5) is connected to the heating device (20), and the end of the second air supply pipe (3) away from the fan (5) is connected to the heat storage device (10). The heat storage device (10) is provided with a gas delivery pipe (9).

[0141] The valves (8) are respectively installed on the first gas pipeline (2), the second gas pipeline (3) and the gas delivery pipeline (9);

[0142] The valve (8) is configured such that when the first gas supply pipe (2) supplies the first carrier gas, the valve (8) on the first gas supply pipe (2) is in an open state, the valve (8) on the second gas supply pipe (3) is in a closed state, and the opening and closing state of the valve (8) on the gas supply pipeline (9) is the same as the opening and closing state of the valve (8) on the first gas supply pipe (2).

[0143] When the first carrier gas is delivered through the second gas delivery pipe (3), the valve (8) on the first gas delivery pipe (2) is closed, and the valve (8) on the second gas delivery pipe (3) is open.

[0144] Optionally, the system further includes a control device (53);

[0145] The control device (53) is configured to open the valve (8) on the first gas pipeline (2) and the valve (8) on the gas delivery pipeline (9) and close the valve (8) on the second gas pipeline (3) when the temperature of the heat storage device (10) is below 800°C.

[0146] When the temperature of the heat storage device (10) is not lower than 800°C, the valve (8) on the first gas pipeline (2) and the valve (8) on the gas delivery pipeline (9) are closed, and the valve (8) on the second gas pipeline (3) is opened.

[0147] Optionally, the system further includes a temperature sensor (54);

[0148] The temperature sensor (54) is disposed on the heat storage device (10) and is configured to detect the temperature inside the heat storage device (10) and transmit a temperature signal to the control device (53).

[0149] Optionally, the reaction device (21) is provided with a first gas outlet pipe (38);

[0150] The first vent pipe (38) is connected to the interior of the heat storage device (10); a carbon dioxide utilization device (39) is connected to the outlet of the heat storage device (10);

[0151] The reaction device (21) is also configured to discharge the carbon dioxide along the first outlet pipe (38) into the heat storage device (10), so that the carbon dioxide exchanges heat with the heat storage particles and stores the heat carried by the carbon dioxide.

[0152] The carbon dioxide utilization device (39) is configured to receive the cooled carbon dioxide.

[0153] Optionally, a dust removal device (27) is provided on the first air outlet pipe (38);

[0154] The inlet of the dust removal device (27) is connected to one end of the first exhaust pipe (38) near the reaction device (21), and the outlet is connected to one end of the first exhaust pipe (38) near the heat storage device (10).

[0155] The dust removal device (27) is configured to separate impurities in the carbon dioxide before cooling and to transport the separated carbon dioxide to the heat storage device (10).

[0156] Optionally, the reaction device (21) is provided with a second gas outlet pipe (40);

[0157] The second vent pipe (40) is connected to the interior of the heat storage device (10);

[0158] The reaction device (21) is also configured to discharge the cooled third carrier gas to the heat storage device (10) through the second outlet pipe (40), so that the cooled third carrier gas exchanges heat with the heat storage particles and recovers the remaining heat of the cooled third carrier gas.

[0159] Optionally, the reaction apparatus (21) includes a decomposition furnace (41) and a gas passage (42);

[0160] The gas channel (42) is located on opposite sides inside the decomposition furnace (41), the second gas outlet pipe (40) is connected to the gas channel (42), and the decomposition furnace (41) is connected to the interior of the heat storage device (10).

[0161] The gas passage (42) is configured to allow the third carrier gas to flow in and to deliver the cooled third carrier gas to the second outlet pipe (40).

[0162] In summary, the present invention has at least the following beneficial technical effects:

[0163] 1. This invention provides a thermal energy storage integrated system based on high-temperature thermochemical conversion, which achieves efficient energy recovery and utilization through thermal energy storage particles during solid waste decomposition. The system uses green energy to power the heating device, and the heat generated by the high-temperature carrier gas is stored in the thermal energy storage particles. The heat released by the thermal energy storage particles then provides a stable heat source for the reaction device. This setup eliminates dependence on fossil fuels, improves the utilization of green energy, and achieves zero-carbon emission operation. The buffering effect of the thermal energy storage particles not only improves the system's operational stability, but the stored renewable energy heat also ensures continuous production. The direct heat transfer method using high-temperature carrier gas effectively enhances the pyrolysis / gasification reaction of solid waste, making the entire treatment process energy-sustainable and clean.

[0164] 2. This invention provides a thermal energy storage integrated system based on high-temperature thermochemical conversion. When used in high-temperature industrial processes, it employs thermal energy storage particles as the heat transfer medium to construct a closed-loop thermal energy cycle system. The system uses green electricity such as photovoltaic or wind power to drive heating devices, generating a high-temperature secondary carrier gas of 1500-1600℃ and storing the heat in the thermal energy storage particles. The heat is then supplied to the system through heat exchange between the primary carrier gas and the thermal energy storage particles, achieving high-temperature conversion and cascade utilization of renewable energy. This system can fully utilize surplus green electricity during off-peak hours of the power grid, combined with industrial waste heat recovery, to achieve clean heating around the clock. The thermal energy storage device, as a thermal inertia buffer unit, can effectively mitigate heating fluctuations caused by the intermittency of renewable energy, ensuring stable process temperatures and improving product qualification rates.

[0165] 3. This invention provides a thermal energy storage integrated system based on high-temperature thermochemical conversion. When used in cement clinker firing, a green electric heating device converts electrical energy into high-temperature heat energy. Thermal energy storage particles store the heat converted from renewable energy sources such as wind and solar power. A carrier gas heat exchanger generates a high-temperature heat source for raw material firing. This system replaces traditional fossil fuel combustion, achieving zero carbonization in the cement firing process. The thermal energy storage system can flexibly adjust heat output to match the firing process requirements, avoiding energy waste. The accompanying waste heat recovery device forms a closed loop with the thermal energy storage system, improving system energy efficiency and providing a revolutionary low-carbon production solution for the cement industry.

[0166] 4. This invention provides a thermal energy storage integrated system based on high-temperature thermochemical conversion. When used for carbonate decomposition, a heating device powered by renewable energy generates a high-temperature carrier gas, storing the heat in thermal storage particles to form a high-temperature heat source. During the reaction, the thermal storage particles release heat to heat the carrier gas, achieving energy transfer. This not only achieves 100% green energy heating, but the buffering characteristics of its thermal storage unit also solve the problem of intermittent renewable energy power supply, ensuring continuous and stable decomposition reactions. Compared to traditional heating methods, this system offers higher heating control precision and significantly improved energy utilization efficiency, providing a new clean production paradigm for the carbonate processing industry. Attached Figure Description

[0167] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0168] Figure 1 This paper shows a schematic diagram of the structure of the integrated thermal storage system based on high-temperature thermochemical conversion for solid waste decomposition proposed in an embodiment of this application.

[0169] Figure 2 A schematic diagram (I) of the thermal storage integrated system based on high-temperature thermochemical conversion proposed in this application for use in high-temperature industrial processes is shown.

[0170] Figure 3 A schematic diagram (II) of the structure of the thermal storage integrated system based on high-temperature thermochemical conversion proposed in this application for use in high-temperature industrial processes is shown.

[0171] Figure 4 This paper shows a schematic diagram of the structure of the integrated thermal storage system based on high-temperature thermochemical conversion proposed in this application for cement clinker firing.

[0172] Figure 5 This paper shows a schematic diagram of the structure of the integrated thermal storage system based on high-temperature thermochemical conversion for carbonate decomposition proposed in an embodiment of this application;

[0173] Figure 6 A flowchart of a carbonate thermal decomposition control method proposed in an embodiment of this application is shown.

[0174] Explanation of reference numerals in the attached figures:

[0175] 1. Gas transmission device; 2. First gas transmission pipe; 3. Second gas transmission pipe; 4. Third gas transmission pipe; 5. Fan; 6. First gas transmission end; 7. Second gas transmission end; 8. Valve; 9. Gas transmission pipeline; 10. Heat storage device; 11. First heat storage tank; 12. Heat release port; 13. First inlet; 14. First outlet; 15. Second heat storage tank; 16. Insulation layer; 17. Exhaust port; 18. Tail gas recovery port; 19. Tail gas pipeline; 20. Heating device; 21. Reaction device; 22. Thermal conversion furnace; 23. Cooler; 24. Air inlet; 25. Gas transmitter; 26. Air outlet; 27. Dust removal device; 28. Input end; 29. ​​First output end; 30. ... Two output terminals; 31. Exhaust gas recovery pipe; 311. Shut-off valve; 32. Throttling valve; 33. Negative pressure fan; 34. Furnace body; 35. Feed inlet; 36. Smelting furnace; 361. Inlet; 362. Outlet; 37. Spray gun; 38. First exhaust pipe; 39. Carbon dioxide utilization device; 40. Second exhaust pipe; 41. Decomposition furnace; 42. Gas passage; 43. Preheating device; 44. Discharge port; 45. Conveying pipe; 46. Gas inlet; 47. Dust collector; 48. Exhaust gas recovery device; 49. Waste heat recovery device; 50. Exhaust gas outlet; 51. Waste heat storage tank; 52. Recovery pipeline; 521. Exhaust fan; 53. Control device; 54. Temperature sensor. Detailed Implementation

[0176] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0177] In the accompanying drawings, the size of constituent elements, the thickness of layers, or areas may sometimes be exaggerated for clarity. Therefore, any implementation of this disclosure is not necessarily limited to the dimensions shown in the drawings, and the shapes and sizes of the components in the drawings do not reflect true proportions. Furthermore, the drawings schematically illustrate ideal examples, and any implementation of this disclosure is not limited to the shapes or values ​​shown in the drawings.

[0178] In related technologies, the treatment of bulk solid waste (such as coal gangue and biomass) faces severe challenges. For example, traditional landfill methods have problems with land occupation and pollution, while thermochemical conversion (gasification, pyrolysis) can convert it into energy products, but it needs to be carried out at high temperatures of 800-1000℃, relying on fossil fuels or electricity for power supply, resulting in high costs and carbon emissions. In addition, unstable energy supply (such as power grid fluctuations) will affect the control of reaction temperature, reduce conversion efficiency and product quality, and the waste heat of reaction products cannot be effectively recovered, resulting in energy waste.

[0179] To address the problems existing in related technologies, this invention provides a thermal energy storage integrated system based on high-temperature thermochemical conversion. (See [link to relevant documentation]). Figure 1 The system includes:

[0180] Gas transmission device 1, heat storage device 10, heating device 20 and reaction device 21;

[0181] The gas supply device 1 includes a first gas supply pipe 2 and a second gas supply pipe 3. The first gas supply pipe 2 is connected to the heating device 20, and the second gas supply pipe 3 is connected to the heat storage device 10.

[0182] The gas supply device 1 is configured to supply the first carrier gas to the heating device 20 through the first gas supply pipe 2, and / or the gas supply device 1 is configured to supply the first carrier gas to the heat storage device 10 through the second gas supply pipe 3.

[0183] The heating device 20 is connected to the heat storage device 10. The heating device 20 is configured to heat the first carrier gas to obtain the second carrier gas and deliver the second carrier gas to the heat storage device 10.

[0184] The heat storage device 10 stores heat storage particles. The heat storage device 10 uses the second carrier gas to heat the heat storage particles to form a first high-temperature heat storage particle. The first high-temperature heat storage particle is used to heat the first carrier gas that enters it to obtain a third carrier gas.

[0185] The reaction device 21 is internally connected to the heat storage device 10. The reaction device 21 is configured to receive the third carrier gas and decompose solid waste with the heat carried by the third carrier gas to obtain decomposition products. The third carrier gas releases heat to form a fourth carrier gas.

[0186] In this invention, the heat storage particles include ceramic balls, molten salt or metal oxides, etc., and achieve heat energy storage and release through heat exchange with the second carrier gas and the first carrier gas;

[0187] Thermochemical conversion is the process of converting solid waste into energy or chemical raw materials through high temperatures;

[0188] The carrier gas in the first / second / third / fourth carrier gas is a circulating gaseous medium in the system used to transfer heat. For example, the initial first carrier gas can be an inert gas, such as air, nitrogen, carbon dioxide, argon, etc. The second / third / fourth carrier gas is the same gaseous medium as the first carrier gas, the only difference being the temperature. Specifically, the temperature of the second carrier gas is 800-1500℃, and more specifically, when the solid waste is biomass, the temperature is 800-1000℃; when the solid waste is coal gangue, the temperature is 1000-1500℃. The temperature of the third carrier gas is the same as the temperature of the second carrier gas. The temperature of the fourth carrier gas is 500-900℃, and more specifically, the outlet temperature after the biomass reaction is complete is 500-700℃; the outlet temperature after the coal gangue reaction is complete is 700-900℃.

[0189] The first high-temperature thermal storage particles are thermal storage particles heated by the second carrier gas to a high temperature of 1000-1500℃. In this invention, the heating device 20 uses solar thermal collection, wind power, or photovoltaic power. The thermal storage device 10 in this invention can smooth out intermittent energy fluctuations and realize the conversion of electrical energy into thermal energy for storage. In this invention, the decomposition products are the outputs of the thermochemical conversion of solid waste. The decomposition products include syngas composed of hydrogen and carbon monoxide, bio-oil, coke, etc. Unreacted solid residues (such as coke) in solid waste can be recycled for the preparation of adsorbent materials or building materials.

[0190] In specific implementation, the first carrier gas is transported to the heating device 20 through the first gas supply pipe 2 using the gas supply device 1. The heating device 20 can be connected to green energy to convert electrical energy into heat energy to heat the first carrier gas, and a second carrier gas is obtained after heating. The second carrier gas enters the heat storage device 10 through the heating device 20 and exchanges heat with the heat storage particles to obtain the first high-temperature heat storage particles. Then, the gas supply device 1 transports the first carrier gas to the heat storage device 10 through the second gas supply pipe 3, so that the first carrier gas exchanges heat with the first high-temperature heat storage particles to obtain a third carrier gas. The third carrier gas is then transported to the reaction device 21. After the third carrier gas enters, it begins to release heat. When the temperature required for thermochemical transformation is reached inside the reaction device 21, the solid waste begins to decompose to obtain decomposition products. The third carrier gas continuously cools down to obtain a fourth carrier gas.

[0191] This invention, through the coupling of a thermal energy storage device 10, significantly reduces the dependence on fossil fuels in the thermochemical conversion process of bulk solid waste. This device can stably release stored heat energy, ensuring a constant reaction temperature, thereby improving conversion efficiency and product quality while reducing the generation of pollutants such as nitrogen oxides. For waste containing harmful elements such as chlorine and sulfur, a stable thermal environment is more conducive to controlling pollutant emissions. Furthermore, the thermal energy storage device 10 can convert heat energy into various forms such as electrical or mechanical energy, achieving diversified energy utilization and providing the possibility for coordinated operation with other energy systems. This system both reduces greenhouse gas emissions and enhances the comprehensive value of energy utilization.

[0192] In some embodiments, see Figure 1 The gas delivery device 1 includes a fan 5 and multiple valves 8;

[0193] The first gas supply pipe 2 and the second gas supply pipe 3 are respectively connected to the fan 5. The heat storage device 10 is provided with a gas delivery pipe 9. The valves 8 are respectively provided on the first gas supply pipe 2, the second gas supply pipe 3 and the gas delivery pipe 9.

[0194] The valve 8 is configured such that when the first gas supply pipe 2 supplies the first carrier gas, the valve 8 on the first gas supply pipe 2 is in an open state, the valve 8 on the second gas supply pipe 3 is in a closed state, and the opening and closing state of the valve 8 on the gas supply pipeline 9 is the same as the opening and closing state of the valve 8 on the first gas supply pipe 2.

[0195] When the first carrier gas is being delivered through the second gas delivery pipe 3, the valve 8 on the first gas delivery pipe 2 is in a closed state, and the valve 8 on the second gas delivery pipe 3 is in an open state.

[0196] In this invention, the fan 5 includes two air outlets, which are respectively connected to the first gas supply pipe 2 and the second gas supply pipe 3, so as to deliver the first carrier gas to the heating device 20 and the heat storage device 10 respectively through the fan 5. In this invention, the valve 8 is used to open or close the first gas supply pipe 2, the second gas supply pipe 3 and the gas delivery pipeline 9. The gas delivery pipeline 9 is used to deliver the cooled second carrier gas. By setting the valve 8, the second carrier gas after heat release can be discharged in time, and heat and the first carrier gas can be prevented from leaking to the external environment along the gas delivery pipeline 9 during the process of obtaining the third carrier gas. In this invention, the opening and closing state of the valve 8 on the gas delivery pipeline 9 is consistent with that of the valve 8 on the first gas supply pipe 2, indicating that when the temperature of the heat storage device 10 is lower than 1400°C, it indicates that the heating to obtain the third carrier gas is not satisfied. Under the specified temperature conditions, heat needs to be stored in the heat storage device 10. Therefore, the valves 8 on the first gas supply pipe 2 and the gas delivery pipe 9 are opened, allowing the fan 5 to deliver the first carrier gas to the heating device 20 along the first gas supply pipe 2 for heating, to continue obtaining the second carrier gas and to continue heating the heat storage particles. The second carrier gas, after releasing heat, is discharged through the gas delivery pipe 9. This stage is the heat storage stage. In this invention, when the temperature of the heat storage device 10 is higher than 1500°C, it indicates that the temperature conditions for heating to obtain the third carrier gas are met. At this time, the heat storage device 10 has completed heat storage. The valves 8 on the first gas supply pipe 2 and the gas delivery pipe 9 are closed to prevent heat from being discharged along the gas delivery pipe 9. At this time, the heat storage device 10 switches to the heat release mode. After opening the valve 8 on the second gas supply pipe 3, the fan 5 directly delivers the first carrier gas to the heat storage device 10 to heat and obtain the third carrier gas.

[0197] In specific implementation, valves 8 on the first gas supply pipe 2 and the gas delivery pipeline 9 are opened, and the fan 5 delivers the first carrier gas along the first gas supply pipe 2 to the heating device 20, where it is heated to obtain the second carrier gas. When the temperature of the heat storage device 10 is below 1400℃, both valves 8 are kept open, and valve 8 on the second gas supply pipe 3 is closed, until the temperature of the heat storage device 10 is above 1500℃. Then, valves 8 on the first gas supply pipe 2 and the gas delivery pipeline 9 are closed, and valve 8 on the second gas supply pipe 3 is opened. The fan 5 delivers the first carrier gas along the second gas supply pipe 3 to the heat storage device 10, so that the first carrier gas comes into contact with the first high-temperature heat storage particles for heat exchange, thereby obtaining the third carrier gas. After the third carrier gas is discharged from the heat storage device 10, it enters the reaction device 21 to provide the heat required for the decomposition of solid waste.

[0198] In this invention, temperature tiered management of the thermal storage device 10 is achieved by setting valve 8, further improving energy utilization efficiency and reducing dependence on external energy sources. The valve 8 stabilizes the temperature of the third carrier gas delivered to the reaction device 21, solving the problem of incomplete solid waste conversion, enhancing system stability, and ultimately achieving a more efficient, economical, and environmentally friendly thermochemical conversion process.

[0199] In some embodiments, see Figure 1 The heat storage device 10 includes a first heat storage tank 11 and a second heat storage tank 15, and both the first heat storage tank 11 and the second heat storage tank 15 store the heat storage particles.

[0200] The first heat storage tank 11 and the second heat storage tank 15 are respectively provided with heat release ports 12, and the heat release ports 12 are respectively connected to the inside of the reaction device 21;

[0201] The gas supply device 1 is connected to the interior of the first heat storage tank 11 and / or the second heat storage tank 15, and the heating device 20 is connected to the interior of the first heat storage tank 11 and / or the second heat storage tank 15.

[0202] The gas delivery device 1 is configured to deliver the first carrier gas to the first heat storage tank 11 and / or the second heat storage tank 15;

[0203] The heating device 20 is configured to deliver the second carrier gas to the first heat storage tank 11 and / or the second heat storage tank 15;

[0204] The first heat storage tank 11 and the second heat storage tank 15 are configured to deliver the third carrier gas to the reaction device 21 through the heat release port 12.

[0205] In this invention, both the first heat storage tank 11 and the second heat storage tank 15 are sealed tanks for storing heat storage particles; the volume and material of the first heat storage tank 11 and the second heat storage tank 15 can be the same or different; the heat storage particles in the first heat storage tank 11 can be completely the same as those in the second heat storage tank 15 in terms of volume, type, melting point, specific heat capacity, etc., or at least one of them can be different; in this invention, the heat release port 12 supplies a third carrier gas to flow into the reaction device 21; a third gas supply pipe 4 is connected to the heat release port 12 on the first heat storage tank 11 and / or the second heat storage tank 15, and the other end of the pipe is connected to the inside of the reaction device 21 to transport the third carrier gas in the first heat storage tank 11 and / or the second heat storage tank 15 to the reaction device 21 for heating. Solid waste; the second gas supply pipe 3 can be connected to the inside of the first heat storage tank 11 and the second heat storage tank 15 respectively. At this time, the heating device 20 is also connected to the inside of the first heat storage tank 11 and the second heat storage tank 15 respectively; the gas supply device 1 is configured to deliver the first carrier gas to the first heat storage tank 11 and the second heat storage tank 15 respectively, so that the first carrier gas exchanges heat with the heat storage particles in the first heat storage tank 11 and the second heat storage tank 15 respectively; the heating device 20 is configured to deliver the second carrier gas to the first heat storage tank 11 and the second heat storage tank 15 respectively, to heat the heat storage particles in the first heat storage tank 11 and the second heat storage tank 15, and the first heat storage tank 11 and the second heat storage tank 15 deliver the third carrier gas to the reaction device 21 through the heat release port 12 respectively, thereby improving the heating efficiency;

[0206] Alternatively, the second gas supply pipe 3 may be connected only to the first heat storage tank 11 or only to the second heat storage tank 15, so that the first heat storage tank 11 or the second heat storage tank 15 can be used as a high-temperature tank for heat storage and heat release; in this case, the heating device 20 may also be connected only to the first heat storage tank 11 or the inside of the second heat storage tank 15, and the heat storage tank connected to the heating device 20 is the same as the heat storage tank connected to the second gas supply pipe 3, so that the heat storage particles in the heat storage tank are heated to obtain the first high-temperature heat storage particles for heating the first carrier gas;

[0207] In one embodiment of this invention, when the heat storage particles in the first heat storage tank 11 are the same as those in the second heat storage tank 15, after introducing the second carrier gas, the heat storage particles in the first heat storage tank 11 and the second heat storage tank 15 are heated to the same temperature. During the heat release stage, the first carrier gas is simultaneously supplied to the first heat storage tank 11 and the second heat storage tank 15 using the gas supply device 1, so that the first carrier gas enters the first heat storage tank 11 and the second heat storage tank 15 respectively to exchange heat with the heat storage particles, and obtains the third carrier gas at the same temperature, so that the first heat storage tank 11 and the second heat storage tank 15 both serve as high-temperature heat sources for heating. Then, the third carrier gas in the first heat storage tank 11 and the second heat storage tank 15 is simultaneously supplied to the reaction device 21 to provide heat for the decomposition of solid waste. Compared with using only one heat storage tank, the heating rate is faster, which can accelerate the thermal decomposition reaction rate and improve the decomposition efficiency.

[0208] In one of the above scenarios, the third carrier gas with the same temperature in the first heat storage tank 11 and the second heat storage tank 15 can also be transported to the reaction device 21. For example, the third carrier gas in the first heat storage tank 11 can be transported to the reaction device 21 to provide heat. When the heat is insufficient, the third carrier gas in the second heat storage tank 15 can be transported to the reaction device 21 to continue to provide heat, so as to ensure that the decomposition of solid waste can proceed continuously and stably.

[0209] In one scenario, when the heat storage particles in the first heat storage tank 11 are the same as those in the second heat storage tank 15, the introduction of the second carrier gas can heat the heat storage particles in the first heat storage tank 11 and the second heat storage tank 15 to different temperatures. For example, the temperature of the heat storage particles in the first heat storage tank 11 may be higher than the temperature of the heat storage particles in the second heat storage tank 15, or vice versa. During the heat release phase, the first carrier gas is simultaneously supplied to the first heat storage tank 11 and the second heat storage tank 15 using the gas supply device 1, allowing the first carrier gas to enter the first heat storage tank 11 and the second heat storage tank 15 respectively. Tank 15 exchanges heat with the heat storage particles to obtain a third carrier gas at a different temperature. The heat storage tank with the higher temperature is used as a high-temperature heat source, while the remaining heat storage tank is used as a medium-temperature heat source. Then, the third carrier gas from the high-temperature heat source is first transported to the reaction device 21 to provide heat. When the heat is insufficient, the third carrier gas from the medium-temperature heat source is transported to the reaction device 21 to supplement the heat, ensuring that the decomposition energy can be carried out continuously and stably. Since the heat required for supplementing the heat is relatively small, it is not necessary to heat the first carrier gas in both heat storage tanks to a high temperature, which is beneficial to saving energy.

[0210] In one scenario, the heat storage particles in the first heat storage tank 11 are different from those in the second heat storage tank 15. After the second carrier gas is introduced, the heat storage particles in the first heat storage tank 11 and the second heat storage tank 15 are heated to different temperatures. Since the amount of heat required for supplementary heating is relatively small, it is not necessary to select heat storage particles with the same specific heat capacity. It is only necessary to set heat storage particles with the corresponding specific heat capacity according to the actual heat stored, so as to save costs.

[0211] In specific implementation, the first carrier gas is delivered to the heating device 20 by the gas delivery device 1, and the first carrier gas is heated to obtain the second carrier gas; then the second carrier gas is delivered to the first heat storage tank 11 and / or the second heat storage tank 15 to heat the heat storage particles in one or both heat storage tanks to obtain the first high-temperature heat storage particles; then the first carrier gas is delivered to the first heat storage tank 11 and / or the second heat storage tank 15 by the gas delivery device 1 again, so that the first high-temperature heat storage particles heat the first carrier gas to obtain the third carrier gas; then the third carrier gas is delivered to the reaction device 21 along the heat release port 12 to provide heat for the decomposition of solid waste.

[0212] This invention employs a dual-storage tank structure to achieve alternating operation and dynamic switching of heat storage and release, ensuring a continuous and stable supply of high-temperature carrier gas to the reaction device 21. When one storage tank releases heat, the other can simultaneously store heat, solving the temperature fluctuation problem of a single storage device, improving the system's thermal response speed and operational continuity, keeping the thermochemical conversion process within the optimal temperature range, significantly improving reaction efficiency, energy utilization, and product quality, while also enhancing the system's adaptability to different operating conditions.

[0213] In some embodiments, see Figure 1The outer walls of the first heat storage tank 11 and the second heat storage tank 15 are provided with a heat insulation layer 16.

[0214] In this invention, the insulation layer 16 can be made of phase change material or aerogel composite material to enhance thermal insulation performance at high temperatures and dissipate heat appropriately at low temperatures; or, lightweight silicon carbide foam material can be used to balance thermal insulation and structural strength, reducing the load on the thermal storage tank; the insulation layer 16 can be configured as a multi-layer composite structure, wherein the inner layer can be ceramic fiber or high-alumina refractory material, which directly contacts the wall of the high-temperature thermal storage tank; the middle layer can be nano-aerogel or vacuum insulation board to minimize heat conduction; and the outer layer can be wrapped with stainless steel or aluminum foil, which is moisture-proof, corrosion-proof and reflects radiant heat.

[0215] This invention adds an insulation layer 16 to the outer walls of the first thermal storage tank 11 and the second thermal storage tank 15, significantly improving the system's thermal management performance. This design effectively reduces heat loss, extends the high-temperature duration of the stored particles, and lowers the energy consumption requirements of the heating device 20. The insulation layer 16 not only maintains a stable reaction temperature and improves conversion efficiency, but also enhances operational safety and equipment durability by reducing the temperature of the outer walls of the tanks.

[0216] In some embodiments, see Figure 1 The reaction device 21 includes a thermal conversion furnace 22, the inlet of which is connected to the heat storage device 10, and a cooler 23 is installed on the connecting pipe at the outlet of the thermal conversion furnace 22.

[0217] The thermal conversion furnace 22 is configured to receive the third carrier gas delivered by the heat storage device 10, decompose the solid waste by means of the heat carried by the third carrier gas, and deliver the obtained decomposition products to the cooler 23.

[0218] The cooler 23 is configured to cool the decomposition products before discharging them.

[0219] In this invention, the cooler 23 is used to rapidly reduce the temperature of the decomposition products and prevent secondary reactions of the high-temperature products, such as tar polymerization. In a specific implementation, the heat storage device 10 includes a first heat storage tank 11 and a second heat storage tank 15. The inlet of the thermal converter 22 is connected to the heat release port 12 on the first heat storage tank 11 and / or the second heat storage tank 15 through a third gas supply pipe 4, so as to transport the third carrier gas in the first heat storage tank 11 and / or the second heat storage tank 15 to the thermal converter 22; the decomposition products are discharged from the thermal converter 22 along the outlet and then transported to the cooler 23, where they are cooled down and then discharged.

[0220] This invention constructs a highly efficient thermochemical conversion system through the synergistic effect of the thermal conversion furnace 22 and the cooler 23, combined with the heat storage device 10 and the heating device 20. The heat storage device 10 provides a stable high-temperature carrier gas, ensuring a constant reaction temperature within the thermal conversion furnace 22 and significantly improving decomposition efficiency. The cooler 23 quickly terminates the secondary reaction, ensuring product quality. The dual heat storage tank design, coupled with valve control, allows the system to continue operating even under external energy fluctuations. The insulation layer 16 effectively reduces heat loss, and the overall system significantly improves the waste conversion rate compared to traditional heating methods.

[0221] In some embodiments, see Figure 1 The cooler 23 is provided with an air inlet 24, and an air conveyor 25 is provided on the connecting pipe of the air inlet 24;

[0222] The gas delivery unit 25 is configured to deliver a first carrier gas with a temperature below 50°C into the cooler 23;

[0223] The cooler 23 is also configured to exchange heat between the first carrier gas with a temperature below 50°C and the decomposition products, recover the heat carried by the decomposition products, and raise the temperature of the first carrier gas with a temperature below 50°C to obtain a fifth carrier gas.

[0224] In this invention, the gas conveyor 25 refers to a gas conveying device, including a fan or compressor, used to pump a low-temperature first carrier gas into the cooler 23. In this invention, the gas conveyor 25 can periodically inject a high-speed carrier gas flow to enhance heat exchange efficiency and prevent pipe coking. In this invention, the temperature of the first carrier gas is below 50°C, which maximizes the heat exchange temperature difference and improves the waste heat recovery efficiency of the decomposition products. The temperature of the fifth carrier gas is 250-900°C. Specifically, when the decomposition product is coal gangue and lime slag, the temperature of the fifth carrier gas is 400-900°C; when the decomposition product is biomass coke, the temperature of the fifth carrier gas is 250-350°C.

[0225] In practice, the gas delivery machine 25 is started to deliver the first carrier gas with a temperature below 50°C to the cooler 23, so that the first carrier gas and the decomposition products can exchange heat. The temperature of the first carrier gas rises to 250-900°C, and the temperature of the decomposition products drops to below 50°C. The cooled decomposition products are then discharged from the cooler 23.

[0226] This invention employs a gas pump 25 to inject a low-temperature first carrier gas into a cooler 23. By directly exchanging heat with the high-temperature decomposition products, waste heat is converted into usable thermal energy, significantly reducing system energy consumption. This carrier gas cooling method replaces traditional water cooling, avoiding equipment corrosion and wastewater treatment problems while maintaining the dryness characteristics of the products.

[0227] In some embodiments, see Figure 1The cooler 23 is provided with an air outlet 26, and a dust removal device 27 is provided on the connecting pipe of the air outlet 26. The end of the dust removal device 27 away from the cooler 23 is connected to the inside of the first heat storage tank 11 and / or the second heat storage tank 15.

[0228] The dust removal device 27 is configured to remove dust from the fifth carrier gas and to deliver the dust-removed fifth carrier gas to the first heat storage tank 11 and / or the second heat storage tank 15.

[0229] The first heat storage tank 11 and the second heat storage tank 15 are also configured to recover the heat carried by the fifth carrier gas after dust removal using the heat storage particles.

[0230] In this invention, the dust removal device 27 refers to a gas purification device, including a cyclone separator, a bag filter, or an electrostatic precipitator, etc., used to remove solid particulate matter from the fifth carrier gas; a laser dust sensor can be installed on the dust removal device 27 to monitor the dust content of the fifth carrier gas, and the dust removal intensity can be automatically switched according to the dust content of the fifth carrier gas to balance energy consumption and purification effect.

[0231] In specific implementation, the fifth carrier gas discharged from the outlet 26 of the cooler 23 first enters the dust removal device 27, and after dust removal, it is transported through pipelines to the first heat storage tank 11 and / or the second heat storage tank 15. When the first heat storage tank 11 and / or the second heat storage tank 15 no longer inputs the second carrier gas or outputs the third carrier gas, the fifth carrier gas can be simultaneously transported to the first heat storage tank 11 and the second heat storage tank 15. When the first heat storage tank 11 and / or the second heat storage tank 15 continue to input the second carrier gas or output the third carrier gas, the fifth carrier gas is selected to be transported to the heat storage tank that has not yet been processed. After the fifth carrier gas comes into contact with the heat storage particles for heat exchange, the heat is recovered.

[0232] This invention employs a dust removal device 27 to purify the fifth carrier gas, preventing contamination of the heat storage particles or blockage of pipelines. The purified high-temperature fifth carrier gas is returned to the heat storage tank, where its heat is absorbed a second time by the heat storage particles. The heat storage tank then captures the medium- and low-temperature waste heat in the fifth carrier gas, forming a four-stage energy recovery path of "reaction heat → product heat → carrier gas heat → heat storage particles," further improving the overall thermal efficiency of the system.

[0233] In some embodiments, the system further includes a preheating device 43;

[0234] The preheating device 43 includes a discharge port 44 and an air inlet 46;

[0235] The discharge port 44 is connected to the reaction device 21 via a conveying pipe 45, and the gas inlet 46 is connected to the interior of the reaction device 21;

[0236] The reaction device 21 is also configured to deliver the fourth carrier gas to the preheating device 43;

[0237] The preheating device 43 is configured to preheat the solid waste entering it using the fourth carrier gas, and to transport the preheated solid waste to the reaction device 21 along the conveying pipe 45. The fourth carrier gas releases heat to form a sixth carrier gas.

[0238] In this invention, the preheating device 43 is a device that uses the fourth carrier gas discharged from the reaction device 21 to preheat the solid waste; the conveying pipe 45 is a solid waste conveying channel connecting the preheating device 43 and the reaction device 21; in this invention, the preheating device 43 and the reaction device 21 can be directly connected through a fluidized bed to reduce heat loss during conveying; in this invention, a spark detection and nitrogen extinguishing system can be installed on the conveying pipe 45 to prevent spontaneous combustion of the waste during preheating.

[0239] In specific implementation, the fourth carrier gas in the reaction device 21 flows into the preheating device 43 through the gas inlet 46, and the solid waste is transported to the preheating device 43 in advance, so that the fourth carrier gas and the solid waste exchange heat. The fourth carrier gas is cooled to 300-500℃ to obtain the sixth carrier gas. Specifically, when the solid waste is biomass, the fourth carrier gas is cooled to 300-400℃ and the solid waste is heated to 200-300℃; when the solid waste is coal gangue, the fourth carrier gas is cooled to 450-600℃ and the solid waste is heated to 400-500℃. Then the heated solid waste is discharged through the discharge outlet 44 and sent into the reaction device 21 through the conveying pipe 45 for decomposition reaction.

[0240] This invention, by incorporating a preheating device 43, ensures that solid waste is partially dried and pyrolyzed before entering the reaction device 21, thus reducing the heat load on the reaction device 21. Simultaneously, the preheated solid waste reacts more fully in the thermal conversion furnace 22, further reducing the incomplete conversion rate. Combined with the stable high-temperature heat source provided by the heat storage device 10 and the high-temperature waste heat recovered by the cooler 23, the overall energy utilization rate of the system is further improved.

[0241] In some embodiments, see Figure 1 The heat storage device 10 includes a first heat storage tank 11 and a second heat storage tank 15;

[0242] A dust collector 47 is installed on the connecting pipe of the air outlet of the preheating device 43. The end of the dust collector 47 away from the preheating device 43 is connected to the interior of the first heat storage tank 11 and / or the second heat storage tank 15.

[0243] The dust collector 47 is configured to receive the sixth carrier gas and perform dust removal treatment, and to deliver the dust-removed sixth carrier gas to the first heat storage tank 11 and / or the second heat storage tank 15.

[0244] The first heat storage tank 11 and the second heat storage tank 15 are further configured to allow the heat storage particles to exchange heat with the dust-removed sixth carrier gas, thereby recovering the remaining heat of the dust-removed sixth carrier gas.

[0245] In this invention, the dust collector 47 is a gas purification device, including a bag filter or an electrostatic precipitator, used to remove dust and particulate matter from the sixth carrier gas. Since fine particles, such as dried biomass debris, are easily generated during the preheating process, it is necessary to prevent them from entering the heat storage tank and contaminating the stored particles. In this invention, the dust collector 47 includes a cyclone separator and a ceramic membrane. The cyclone separator performs coarse dust removal, filtering large particles of impurities, while the ceramic membrane performs fine dust removal, filtering fine dust particles, thereby improving the dust removal efficiency.

[0246] In specific implementation, the sixth carrier gas, after being discharged from the outlet of the preheating device 43, enters the dust collector 47, and after dust removal, is transported to the first heat storage tank 11 and / or the second heat storage tank 15. For example, when neither the first heat storage tank 11 nor the second heat storage tank 15 is storing or releasing heat, the sixth carrier gas is simultaneously transported to both tanks, allowing the dust-removed sixth carrier gas to exchange heat with the heat storage particles and recover the remaining heat of the sixth carrier gas. If one of the heat storage tanks is storing or releasing heat, the sixth carrier gas is transported to the tank that is not storing or releasing heat, avoiding the input of the sixth carrier gas from affecting the temperature gradient inside the storing / releasing heat tank. In this invention, by returning the sixth carrier gas discharged from the preheating device 43 to the heat storage tank after dust removal, multi-stage heat recovery of the system is achieved, further reducing the system's dependence on external energy, and the dust removal ensures the long-term stability of the heat storage particles.

[0247] In some embodiments, see Figure 1 The system also includes an exhaust gas recovery device 48;

[0248] The first heat storage tank 11 and the second heat storage tank 15 are provided with exhaust ports 17, and the exhaust ports 17 are connected to the exhaust gas recovery device 48.

[0249] The exhaust gas recovery device 48 is configured to recover the carrier gas discharged from the first heat storage tank 11 and the second heat storage tank 15.

[0250] In this invention, the carrier gas discharged from the first heat storage tank 11 and the second heat storage tank 15 includes the carrier gas formed by the cooling of the fifth and sixth carrier gases after heat exchange; in this invention, the tail gas recovery device 48 refers to the equipment used to collect and process the low-temperature carrier gas finally discharged from the heat storage tank; the exhaust port 17 is the outlet on the heat storage tank used to discharge the carrier gas that has completed the entire heat exchange process. After multiple stages of heat exchange, the temperature of the carrier gas is close to the ambient temperature, and the heat recovery value is extremely low. However, by recovering this part of the carrier gas, it can be recycled and reused, reducing the impact on the environment.

[0251] In specific implementation, the carrier gas obtained after cooling the fifth carrier gas in the first heat storage tank 11 and / or the second heat storage tank 15 enters the exhaust gas recovery device 48 for recovery through the exhaust port 17, and the carrier gas obtained after cooling the sixth carrier gas in the first heat storage tank 11 and / or the second heat storage tank 15 also enters the exhaust gas recovery device 48 for recovery through the exhaust port 17.

[0252] This invention recycles the treated low-temperature carrier gas through the exhaust gas recovery device 48, significantly reducing system carrier gas loss. By combining the high-temperature heat storage of the heat storage device 10, the waste heat recovery of the cooler 23, and the cascade utilization of the preheating device 43, a complete "zero-emission" thermochemical conversion system for solid waste is constructed.

[0253] In related technologies, high-temperature industrial processes have long faced systemic challenges such as dependence on fossil fuels, energy waste, and thermal pollution. Traditional processes rely on the combustion of fuels such as coal and natural gas for heating, which not only produces large amounts of greenhouse gases but also involves significant energy waste—high-temperature waste heat (such as 1000°C blast furnace gas) generated in processes such as steel smelting and non-ferrous metal processing is often directly emitted. This industrial waste heat leads to thermal pollution problems such as increased temperatures in surrounding water bodies and abnormal regional climate, severely damaging the ecological environment. Although renewable energy sources such as wind power and photovoltaics can partially replace fossil fuels, their intermittent power supply characteristics make it difficult to meet the continuous production needs of industry.

[0254] Based on the problems existing in the relevant technologies, see Figure 2 This invention provides a thermal energy storage integrated system based on high-temperature thermochemical conversion, the system comprising:

[0255] Gas transmission device 1, heat storage device 10, heating device 20 and reaction device 21;

[0256] The gas supply device 1 is connected to the heating device 20 via a first gas supply pipe 2, the gas supply device 1 is connected to the heat storage device 10 via a second gas supply pipe 3, the heat storage device 10 is internally connected to the heating device 20, the heat storage device 10 is connected to the reaction device 21 via a third gas supply pipe 4, and the heat storage device 10 stores heat storage particles.

[0257] The gas supply device 1 is configured to supply the first carrier gas to the heating device 20 through the first gas supply pipe 2, and / or supply the first carrier gas to the heat storage device 10 through the second gas supply pipe 3;

[0258] The heating device 20 is configured to heat the first carrier gas delivered by the first gas pipe 2 to 1500-1600°C to obtain a second carrier gas, and to deliver the second carrier gas to the heat storage device 10.

[0259] The heat storage device 10 is configured to heat the heat storage particles using the heat carried by the second carrier gas, and to heat the first carrier gas delivered by the second gas pipe 3 using the heated heat storage particles to obtain a third carrier gas.

[0260] The reaction device 21 is configured to receive the third carrier gas through the third gas supply pipe 4, utilize the heat carried by the third carrier gas to carry out a high-temperature industrial process, and cool down the third carrier gas to form a fourth carrier gas.

[0261] The high-temperature industrial process includes blast furnace ironmaking or non-ferrous metal smelting.

[0262] In this invention, the heat storage particles are solid materials with high specific heat capacity and high temperature resistance (>1600℃), including white corundum, silicon oxide, aluminum oxide, magnesium oxide, titanium dioxide, etc., used to store and release thermal energy; the carrier gas in this invention is a gaseous medium, including nitrogen, argon, or tail gas recirculation gas, etc., which circulates in the system as a heat carrier; the difference between the first / second / third / fourth carrier gases is only their temperature, and all four are the same gaseous medium; in this invention, the heat storage device 10 is provided with a gas delivery pipe 9, and a regulating valve is provided on the gas delivery pipe 9; when the heating device 20 delivers the second carrier gas to the heat storage device 10, the regulating valve is opened to allow the second carrier gas to flow freely. After exchanging heat with the heat storage particles, the gas is discharged from the heat storage device 10 through the gas delivery pipe 9. When the gas delivery device 1 delivers the first carrier gas to the heat storage device 10, the regulating valve is closed to prevent heat loss from the heat storage device 10 and to prevent leakage of the first carrier gas along the gas delivery pipe 9. In this invention, the heating device 20 injects the second carrier gas into the heat storage device 10 through an internal pipe or combustion chamber, and the gas flows upward to heat the heat storage particles. In this invention, the heating device 20 is connected to intermittent green energy sources such as solar and wind power to convert electrical energy into heat energy, which is stored in the second carrier gas. This allows high-temperature industrial processes to utilize the stored heat energy, reducing dependence on fossil fuels. Simultaneously, using green energy to provide heat significantly reduces greenhouse gas emissions, meeting environmental protection requirements.

[0263] In specific implementation, the first carrier gas is transported to the heating device 20 through the first gas transmission pipe 2 using the gas transmission device 1. The heating device 20 can be connected to green energy to convert electrical energy into heat energy to heat the first carrier gas and obtain the second carrier gas. The second carrier gas enters the heat storage device 10 through the heating device 20 and exchanges heat with the heat storage particles. Then, the first carrier gas is transported to the heat storage device 10 through the second gas transmission pipe 3 using the gas transmission device 1, so that the first carrier gas exchanges heat with the heated heat storage particles to obtain the third carrier gas. The third carrier gas is transported to the reaction device 21 through the third gas transmission pipe 4. After the third carrier gas enters, it begins to release heat. When the temperature inside the reaction device 21 reaches the temperature required for high-temperature industrial processes, the high-temperature industrial process begins and the corresponding products are obtained. After the third carrier gas is continuously cooled, the fourth carrier gas is obtained.

[0264] In this invention, heat storage particles are used to store and release heat, replacing the direct combustion of traditional fuels and significantly reducing greenhouse gas emissions. Through the cyclic heating of the heat storage particles and the multi-stage utilization of the carrier gas, heat is efficiently transferred to the reaction device 21, thereby improving the overall thermal efficiency of the system. The heat storage device 10, acting as a "thermal battery," can balance energy fluctuations and ensure a stable heat supply of 1500-1600℃ for high-temperature industrial processes, avoiding the temperature fluctuation problems of traditional combustion processes. The energy storage device provided by this invention can be directly adapted to existing high-temperature industrial scenarios such as blast furnace ironmaking and non-ferrous metal smelting, achieving efficient utilization of thermal energy and a significant reduction in carbon emissions without requiring modifications to the core reaction device 21.

[0265] In some embodiments, see Figure 2 The gas delivery device 1 includes a fan 5 and multiple valves 8;

[0266] The fan 5 includes a first air supply end 6 and a second air supply end 7. The end of the first air supply pipe 2 away from the heating device 20 is connected to the first air supply end 6, and the end of the second air supply pipe 3 away from the heat storage device 10 is connected to the second air supply end 7. The valves 8 are respectively disposed on the first air supply pipe 2 and the second air supply pipe 3.

[0267] The valve 8 is configured such that when the first gas supply pipe 2 is supplying the first carrier gas, the valve 8 on the first gas supply pipe 2 is in an open state, and the valve 8 on the second gas supply pipe 3 is in a closed state.

[0268] When the first carrier gas is being delivered through the second gas delivery pipe 3, the valve 8 on the first gas delivery pipe 2 is in a closed state, and the valve 8 on the second gas delivery pipe 3 is in an open state.

[0269] In this invention, the blower 5 includes a high-pressure centrifugal blower or a Roots blower for providing gas transport power; a bypass valve can be added to the outlet of the blower 5 to switch to bypass mode to maintain minimum gas supply when any gas pipeline is blocked; in this invention, a parallel standby blower 5 can be set on one side of the blower 5, which automatically switches when the main blower 5 fails to ensure continuous operation; in this invention, the blower 5 can be replaced with a variable frequency motor powered by wind power / photovoltaic power to further promote energy conservation and emission reduction of the system; in this invention, the first gas supply end 6 / second gas supply end 7 refers to the two gas outlets of the blower 5, which correspond to the gas supply paths of the first gas pipeline 2 and the second gas pipeline 3, respectively; the valve 8 in this invention includes a high-temperature solenoid valve or a pneumatic butterfly valve with a temperature resistance of >500℃; in this invention, a pressure sensor can be added after the valve 8 to monitor the pipeline status in real time and trigger emergency shutdown when abnormal; in this invention, a branch valve can be added to the first gas pipeline 2 to divert part of the second carrier gas to the waste heat boiler or other low-grade heat users to achieve cascade utilization.

[0270] In practice, first open valve 8 on the first gas supply pipe 2 and close valve 8 on the second gas supply pipe 3. Start the fan 5. The fan 5 delivers the first carrier gas through the first gas supply pipe 2 to the heating device 20, where it is heated to obtain the second carrier gas. Then, the second carrier gas is delivered to the heat storage device 10 to exchange heat with the heat storage particles. When the heat storage particles in the heat storage device 10 reach a temperature of over 1600°C, the heat exchange is complete. Close valve 8 on the first gas supply pipe 2 and open valve 8 on the second gas supply pipe 3. The fan 5 delivers the first carrier gas along the second gas supply pipe 3 to the heat storage device 10 to exchange heat with the heated heat storage particles, obtaining a third carrier gas with a temperature of 1500-1600°C.

[0271] This invention uses valve 8 to regulate the direction of the first carrier gas flow, enabling rapid switching between the gas supply modes of the thermal storage device 10 and the heating device 20. When the thermal storage device 10 needs supplemental heating, the second gas supply pipe 3 is closed and the first gas supply pipe 2 is opened; when the reaction device 21 needs direct heating, the operation is reversed. This setup not only avoids ineffective gas circulation and energy loss, but also maintains stable pipeline pressure through the dual-outlet fan 5, effectively preventing equipment damage while reducing the heat load on the heating device 20, thus improving overall system energy efficiency and reducing fossil fuel consumption.

[0272] In some embodiments, see Figure 2 The heat storage device 10 includes at least one first heat storage tank 11;

[0273] Each of the first thermal storage tanks 11 includes a first inlet 13 and a first outlet 14;

[0274] The end of the second gas supply pipe 3 away from the gas supply device 1 is connected to the first inlet 13, and the end of the third gas supply pipe 4 away from the reaction device 21 is connected to the first outlet 14.

[0275] The heating device 20 is in communication with the interior of at least one of the first heat storage tanks 11, and the heating device 20 is configured to deliver the second carrier gas into at least one of the first heat storage tanks 11.

[0276] In this invention, the first heat storage tank 11 is a high-temperature resistant (>1600℃) pressure vessel, filled with heat storage particles, and its outer shell is made of ceramic fiber or high-alumina refractory material for insulation; in this invention, the first inlet 13 is a gas inlet located on the top or side of the first heat storage tank 11, receiving the first carrier gas supplied from the second gas supply pipe 3; the first outlet 14 is a gas outlet located on the side of the first heat storage tank 11, outputting the third carrier gas heated by the heat storage particles; in this invention, in one case, when two first heat storage tanks 11 are provided in the system, the system... A heating device 20 can be installed, the outlet of which is connected to the interior of two first heat storage tanks 11 respectively. The two first heat storage tanks 11 are connected to the interior of the reaction device 21 respectively through a third gas supply pipe 4. The heating device 20 delivers the heated second carrier gas to the two first heat storage tanks 11 respectively, so that the heat storage particles in the two first heat storage tanks 11 absorb heat and rise in temperature. Both first heat storage tanks 11 can be used as high-temperature tanks, or one of the first heat storage tanks 11 can be used as a high-temperature tank and the other first heat storage tank 11 can be used as a heat replenishment tank.

[0277] Alternatively, the outlet of the heating device 20 may be connected to the interior of only one of the first heat storage tanks 11, and only one of the first heat storage tanks 11 may be connected to the interior of the reaction device 21 through the third gas supply pipe 4. This heat storage tank may be used as a high-temperature tank, and the other first heat storage tank 11 may be used as a backup tank. If necessary, the heating device 20 may be connected to the backup tank so that the backup tank may be used as a high-temperature tank.

[0278] In one scenario, when the system has two first thermal storage tanks 11, two heating devices 20 can be installed, each mounted on one of the two first thermal storage tanks 11. Each heating device 20 is connected to the interior of a gas delivery device 1. Simultaneously, the gas delivery device 1 can include two fans 5, each fan 5 equipped with a first gas delivery pipe 2 and a second gas delivery pipe 3. A first gas delivery pipe 2, a fan 5, and a second gas delivery pipe 3 form a gas delivery assembly. Each of the two gas delivery assemblies corresponds one-to-one with one of the two heating devices 20. The first gas delivery pipe 2 is connected to the heating device 20, and the second gas delivery pipe 3 is connected to the first thermal storage tank 11. In practice, each first thermal storage tank 11 can independently perform the heat storage and release process. Through the above configuration, both first thermal storage tanks 11 can operate independently, thereby improving the system's flexibility.

[0279] In this invention, a gas distribution plate can be added inside the first heat storage tank 11 to fluidize the heat storage particles and improve the gas-solid heat exchange efficiency.

[0280] In specific implementation, a first carrier gas is delivered to a heating device 20 using a gas delivery device 1. The first carrier gas is heated to obtain a second carrier gas. The second carrier gas is then delivered to at least one first heat storage tank 11 to heat the heat storage particles within the tank. The first carrier gas is then delivered back to the first heat storage tank 11 using the gas delivery device 1, allowing the heated heat storage particles to heat the first carrier gas again, resulting in a third carrier gas. This third carrier gas is then delivered to a reaction device 21 to provide heat for the high-temperature industrial process. This invention features at least one first heat storage tank 11, with a first inlet 13 and a first outlet 14 to achieve directional flow of the carrier gas, ensuring sufficient heat exchange among the heat storage particles. The heating device 20 directly provides high-temperature carrier gas to the first heat storage tank 11, enabling rapid heating of the heat storage particles and solving the thermal delay problem of traditional heat storage systems.

[0281] In some embodiments, see Figure 2 The reaction device 21 is equipped with a tail gas recovery pipe 31;

[0282] The heat storage device 10 is provided with a tail gas recovery port 18, and the end of the tail gas recovery pipe 31 away from the reaction device 21 is connected to the tail gas recovery port 18.

[0283] The heat storage device 10 is also configured to receive the fourth carrier gas output from the reaction device 21 and transported by the tail gas recovery pipe 31, use the fourth carrier gas to heat the heat storage particles, and recover the residual heat of the fourth carrier gas.

[0284] In this invention, the exhaust gas recovery pipe 31 refers to a high-temperature resistant alloy pipe covered with an insulation layer, which connects the exhaust port of the reaction device 21 and the exhaust gas recovery port 18 of the heat storage device 10, and is used to transport the fourth carrier gas; in this invention, when the heat storage device 10 includes at least one first heat storage tank 11, the exhaust gas recovery port 18 is an inlet located on the side wall or top of the first heat storage tank 11, which is connected to the exhaust gas recovery pipe 31.

[0285] In one scenario, when the system of the present invention includes multiple first heat storage tanks 11, the exhaust gas can be preferentially introduced into a low-temperature tank to achieve cascaded waste heat utilization. The low-temperature tank refers to other first heat storage tanks 11 besides those that supply the third carrier gas to the reaction device 21. In the present invention, multiple first heat storage tanks 11 can be connected in series, that is, two adjacent first heat storage tanks 11 are connected by a pipeline. At this time, the end of the exhaust gas recovery pipe 31 away from the reaction device 21 is connected to the exhaust gas recovery port 18 on the first first heat storage tank 11. The fourth carrier gas is transported to the first first heat storage tank 11 through the exhaust gas recovery pipe 31, and after exchanging heat with the heat storage particles, it is then transported to the adjacent first heat storage tank 11 through the series pipeline, and after exchanging heat with the heat storage particles in the adjacent first heat storage tank 11, it is then transported to the next first heat storage tank 11, forming a cascaded heat recovery of high-temperature tank → medium-temperature tank → low-temperature tank.

[0286] In practice, the fourth carrier gas output from the reaction device 21 enters the tail gas recovery pipe 31 and reaches the tail gas recovery port 18. It then enters the heat storage device 10 through the tail gas recovery port 18 and exchanges heat with the heat storage particles in the heat storage device 10 to recover the remaining heat of the fourth carrier gas.

[0287] This invention recovers the waste heat of the fourth carrier gas through the exhaust gas recovery pipe 31, reducing system energy consumption and thermal pollution. The recovered fourth carrier gas serves as an auxiliary heat source, working in conjunction with the second carrier gas in the heating device 20 to preheat the heat storage particles, effectively shortening the heat storage cycle.

[0288] In some embodiments, see Figure 2 The heat storage device 10 includes two first heat storage tanks 11, and each first heat storage tank 11 stores the heat storage particles.

[0289] Each of the first heat storage tanks 11 is provided with the exhaust gas recovery port 18, and the end of the exhaust gas recovery pipe 31 away from the reaction device 21 is connected to the exhaust gas recovery port 18 on the two first heat storage tanks 11 respectively; a throttling valve 32 is provided on the connecting pipe between the exhaust gas recovery pipe 31 and the two exhaust gas recovery ports 18.

[0290] The exhaust gas recovery pipe 31 is configured to deliver the fourth carrier gas to at least one of the first heat storage tanks 11, so that the fourth carrier gas heats the heat storage particles in at least one of the first heat storage tanks 11.

[0291] The throttle valve 32 is configured to open when the fourth carrier gas is delivered into the first heat storage tank 11 through the exhaust gas recovery pipe 31.

[0292] In this invention, the throttle valve 32 includes an electric butterfly valve or a needle valve, which controls the flow rate of the fourth carrier gas by adjusting its opening degree, and its temperature resistance must be ≥800℃. In this invention, of the two first heat storage tanks 11, one is used to receive the fourth carrier gas to heat the heat storage particles, i.e., heat storage mode, and is in exothermic mode when the third carrier gas is output. The other first heat storage tank 11 can be in exothermic mode simultaneously for use by the reaction device 21, and then switched to heat storage mode later. In this invention, the tail gas recovery pipe 31 includes two branch pipes, and the throttle valve 32 is set on each branch pipe. The end of each branch pipe away from the tail gas recovery pipe 31 is connected to the tail gas recovery port 18 on the first heat storage tank 11. In this invention, a check valve can be added after the throttle valve 32 to prevent the carrier gas from flowing back. In this invention, a balance pipe can be set between the two first heat storage tanks 11 to avoid pressure imbalance.

[0293] In practice, the fourth carrier gas discharged from the reaction device 21 enters the tail gas recovery pipe 31. The throttle valve 32 on the tail gas recovery pipe 31 connected to the first heat storage tank 11 (in heat storage mode) is opened to deliver the fourth carrier gas into the first heat storage tank 11, recovering the heat carried by the fourth carrier gas. Simultaneously, the throttle valve 32 on the tail gas recovery pipe 31 connected to the first heat storage tank 11 (in heat release mode) is closed to prevent the low-temperature fourth carrier gas from entering and causing temperature fluctuations inside the tank. When both first heat storage tanks 11 are in heat storage mode, all throttle valves 32 on the tail gas recovery pipe 31 can be opened to allow the fourth carrier gas to enter both first heat storage tanks 11, recovering the remaining heat.

[0294] This invention employs a dual first heat storage tank 11 configuration, with each tank capable of operating independently in different modes: during heat storage, it receives either the fourth carrier gas or the second carrier gas discharged from the heating device 20; during heat release, it supplies the third carrier gas to the reaction device 21, achieving continuous energy supply. The fourth carrier gas is preferentially introduced into the low-temperature heat storage tank via a throttling valve 32, ensuring full recovery of waste heat and reducing heat loss and pollution emissions.

[0295] In some embodiments, see Figure 2 The exhaust gas recovery pipe 31 is equipped with a dust removal device 27;

[0296] The dust removal device 27 is configured to remove dust from the fourth carrier gas output from the reaction device 21, and the gas after dust removal is transported through the tail gas recovery pipe 31.

[0297] In this invention, the dust removal device 27 is a high-temperature gas purification device, including a ceramic fiber filter, a cyclone dust collector or an electrostatic dust collector; the dust removal device 27 is located at one end of the tail gas recovery pipe 31 near the reaction device 21, to ensure that the fourth carrier gas flowing into the heat storage device 10 through the tail gas recovery pipe 31 is all treated by dust removal.

[0298] In practice, the fourth carrier gas discharged from the reaction device 21 enters the dust removal device 27 through the tail gas recovery pipe 31, and after dust removal, it flows back into the tail gas recovery pipe 31 for re-transportation.

[0299] In this invention, by incorporating a dust removal device 27, particulate matter carried in the fourth carrier gas can be effectively removed, preventing contamination of the heat storage particles and pipe blockage, thus extending the service life of the heat storage device 10 and valves 8, among other equipment. Furthermore, the clean fourth carrier gas ensures that the heat exchange efficiency of the heat storage particle surface is not affected by dust, maintaining the system's high-efficiency heat transfer performance.

[0300] In some embodiments, see Figure 2 A negative pressure fan 33 is installed on the exhaust gas recovery pipe 31 between the dust removal device 27 and the heat storage device 10;

[0301] The air inlet of the negative pressure fan 33 is connected to the exhaust gas recovery pipe 31 on the side near the dust removal device 27, and the air outlet is connected to the exhaust gas recovery pipe 31 on the side near the heat storage device 10.

[0302] The negative pressure fan 33 is configured to blow the dust-removed gas through the exhaust gas recovery pipe 31 into the heat storage device 10.

[0303] In this invention, the negative pressure fan 33 operates at a temperature ≥600℃; the air volume is adjustable from 30% to 100% through frequency conversion control, and an emergency cooling system, such as an air bearing + water cooling jacket, can be equipped to ensure safe system operation; in this invention, the air inlet of the negative pressure fan 33 is connected to the outlet side of the dust removal device 27 to maintain a slight negative pressure in the dust removal section, and the air outlet is connected to the end of the exhaust gas recovery pipe 31 near the heat storage device 10 to provide gas transport power; in this invention, explosion relief doors can be installed before and after the negative pressure fan 33, and a check valve can be configured at the air outlet of the negative pressure fan 33 to prevent the backflow of the fourth carrier gas after dust removal.

[0304] In practice, after the fourth carrier gas is dusted by the dust removal device 27, the negative pressure fan 33 draws it from the air inlet to the air outlet, and then transports it to the heat storage device 10 through the tail gas recovery pipe 31.

[0305] In this invention, by setting up a negative pressure fan 33, the resistance loss of the dust removal device 27 and the pipeline system can be effectively overcome, ensuring that the fourth carrier gas can be stably delivered to the heat storage device 10, which is particularly suitable for long-distance pipeline transportation conditions. By maintaining a slightly negative pressure state at the outlet of the reaction device 21 through active suction, the risk of leakage of the fourth carrier gas is avoided, and operational safety is improved.

[0306] In some embodiments, see Figure 2 The system also includes an exhaust gas recovery device 48;

[0307] The exhaust gas recovery device 48 is internally connected to the heat storage device 10;

[0308] The exhaust gas recovery device 48 is configured to recover the carrier gas discharged from the heat storage device 10 that has been cooled to below 50°C.

[0309] In this invention, the carrier gas with a temperature below 50°C is the fourth carrier gas whose temperature drops below 50°C after exchanging heat with the heat storage particles in the heat storage device 10; in this invention, the tail gas recovery device 48 includes a condenser, an alkaline scrubbing tower, an adsorption tower, a filter, etc., for cooling the carrier gas to below the dew point, removing acidic gases, activated carbon / molecular sieves, and removing submicron particles, etc.

[0310] In this invention, when the heat storage device 10 includes two first heat storage tanks 11, each first heat storage tank 11 can have an outlet. The outlet is connected to the interior of the exhaust gas recovery device 48 via a connecting pipe, so as to centrally recover and process the remaining carrier gas in the two first heat storage tanks 11. This invention achieves carrier gas recycling by recovering and processing the low-temperature carrier gas discharged from the heat storage device 10, thus achieving the goal of zero emissions in high-temperature industrial processes. The purified carrier gas can be re-transported to the gas transmission device 1 for reuse, reducing the carrier gas replenishment requirements and operating costs.

[0311] In some embodiments, see Figure 2 The reaction device 21 is configured to receive the third carrier gas through the third gas supply pipe 4 and use the heat carried by the third carrier gas to carry out a high-temperature industrial process, wherein the high-temperature industrial process is a blast furnace ironmaking process.

[0312] The reaction apparatus 21 includes a furnace body 34;

[0313] The furnace body 34 is provided with an air inlet 24, a feed inlet 35 and a discharge outlet 44;

[0314] The air inlet 24 is connected to the end of the third air pipe 4 that is away from the heat storage device 10;

[0315] The air inlet 24 is configured to allow the third carrier gas to enter the furnace body 34;

[0316] The feed inlet 35 is configured to feed iron ore, coke and limestone into the furnace body 34;

[0317] The furnace body 34 is configured to utilize the high-temperature environment provided by the third carrier gas to burn the coke, obtain carbon monoxide, and cause the iron ore to undergo a reduction reaction with the carbon monoxide to obtain molten iron.

[0318] The discharge port 44 is configured to discharge the molten iron.

[0319] In this invention, the air inlet 24 of the furnace body 34 is a high-temperature resistant ceramic nozzle, made of materials including Al2O3-ZrO2 composite materials, which can be evenly distributed along the furnace circumference; in this invention, the feed inlet 35 can be connected to a belt conveyor and a weighing device for quantitative feeding; in this invention, the reaction device 21 also includes a feeding platform, which is connected to the feed inlet 35, and is used to replenish iron ore in a timely manner during high-temperature industrial processes; in this invention, the discharge port 44 can be equipped with an electromagnetic induction heating siphon-type iron tapping device. To facilitate rapid discharge; in this invention, the discharge port 44 can be directly connected to molten iron ladle cars and slag treatment lines, etc., to facilitate the recovery of molten iron and waste slag; in this invention, the iron ore includes hematite, magnetite, etc.; in this invention, coke undergoes a combustion reaction with the third carrier gas at the bottom tuyeres of the blast furnace, generating high temperatures, reaching 1500-1600℃. This temperature enables the iron oxide in the iron ore to be reduced to molten iron by carbon monoxide, and the molten iron flows out from the discharge port 44 at the bottom of the blast furnace for subsequent steelmaking; wherein, the reduction reaction mainly includes:

[0320] Main reaction: FeO + CO → Fe + CO (driven by CO produced from the pyrolysis of coke by the third carrier gas)

[0321] Auxiliary reaction: C + CO → CO (endothermic reaction, sustained by heat from the third carrier gas);

[0322] In this invention, the reaction device 21 also includes a slag outlet, which is used to discharge the slag remaining after the reduction reaction in order to avoid blockage in the furnace body 34.

[0323] In practice, the third carrier gas is transported into the furnace body 34 through the air inlet 24. The third carrier gas is transported from bottom to top in the furnace body 34. Iron ore, coke and limestone are transported into the furnace body 34 in advance through the feed inlet 35. Under the heating of the third carrier gas, the coke is burned to obtain carbon monoxide. The carbon monoxide flows upward and reacts with the iron ore to obtain molten iron.

[0324] This invention employs a third carrier gas to replace traditional fuel combustion of coke for heating, significantly reducing fuel consumption in the blast furnace ironmaking process and lowering carbon emission intensity. The third carrier gas is directionally delivered through inlet 24, creating a uniform temperature gradient distribution within the furnace body 34, which helps improve iron ore reduction efficiency. Since coke primarily serves as a reducing agent rather than a heat source, its quality requirements are reduced, which helps broaden the sources of usable coke.

[0325] In some embodiments, see Figure 3 The reaction device 21 is configured to receive the third carrier gas through the third gas supply pipe 4 and use the heat carried by the third carrier gas to carry out a high-temperature industrial process, wherein the high-temperature industrial process is a non-ferrous metal smelting process.

[0326] The reaction device 21 includes a smelting furnace 36 and a spray gun 37;

[0327] The input end of the spray gun 37 is connected to the end of the third gas pipe 4 away from the heat storage device 10, and the output end is connected to the inside of the smelting furnace 36.

[0328] The inlet 361 of the smelting furnace 36 is configured to convey copper concentrate into the smelting furnace 36;

[0329] The spray gun 37 is configured to inject the third carrier gas into the copper concentrate to form a stirred fluid;

[0330] The smelting furnace 36 is configured to smelt the copper concentrate using the heat carried by the stirring fluid formed by the third carrier gas to obtain matte, as well as a mixture of metal and slag.

[0331] The outlet 362 of the smelting furnace 36 is configured to discharge matte, as well as a mixture of metal and slag.

[0332] In this invention, the smelting furnace 36 is an Isa furnace. The Isa furnace adopts a flat-topped circular furnace body lined with refractory bricks. The furnace lining can be made of chrome-magnesium bricks + copper water-cooled walls, etc.

[0333] In this invention, the spray gun 37 has a multi-layered sleeve structure, wherein the inner tube is made of high-temperature resistant alloy for conveying the third carrier gas, and the outer tube is a copper water-cooled jacket; in this invention, the tip of the spray gun 37 can be made of materials such as ZrO2-Y2O3 composite ceramic; in this invention, the stirring fluid is a supersonic gas-solid two-phase flow formed by the injection of the third carrier gas; in this invention, the spray gun 37 is inserted into the furnace from the top of the furnace and injects gas, oxygen and fuel into the molten material (molten material formed by heating copper concentrate) in the furnace to form a strong stirring fluid, ensuring rapid reaction between raw materials and oxygen; in this invention, when molten slag splashes in the furnace, it forms a coating on the spray gun 37, which can protect the part of the spray gun 37 exposed to the molten material from damage by the strong corrosive environment; in this invention, the resulting product, a mixture of matte, metal and slag, can be discharged from the outlet 362 with a cooling water jacket at the bottom of the furnace, and then enters the precipitation furnace, where matte and slag are separated by their different specific gravities; the copper content in the matte is 60-75%, and the temperature is 1150-1250℃.

[0334] In practice, copper concentrate is transported to the smelting furnace 36 through inlet 361. The third carrier gas is introduced through the input end of the spray gun 37 and sprayed into the copper concentrate from the output end of the spray gun 37 to form a stirring fluid. Under the action of the stirring fluid, the copper concentrate is smelted to obtain a mixture of matte, metal and slag. The mixture of matte, metal and slag is discharged from the smelting furnace 36 through outlet 362.

[0335] This invention employs a heating method that directly injects a high-temperature third carrier gas at 1500-1600℃ into the copper concentrate using a spray gun 37, replacing traditional fuel combustion heating and thus reducing smelting energy consumption. Furthermore, compared to traditional static heating, this invention utilizes gas-solid heat transfer, further improving heat transfer efficiency.

[0336] Among related technologies, the cement clinker calcination process presents significant energy and environmental problems. For example, the calcination process requires maintaining a high-temperature environment of 1400-1450℃, primarily relying on fossil fuels such as coal and natural gas. This not only results in high energy consumption and costs but also emits large amounts of greenhouse gases. Furthermore, over 50% of the high-temperature waste heat generated during production is not effectively recovered, leading to both energy waste and thermal pollution. In addition, uneven temperature distribution within the kiln and incomplete fuel combustion often result in unstable clinker quality and defects such as yellow core clinker, directly impacting product performance. These issues have become major bottlenecks restricting the sustainable development of the cement industry.

[0337] To address the problems existing in related technologies, this invention provides a thermal energy storage integrated system based on high-temperature thermochemical conversion. (See [link to relevant documentation]). Figure 4 The system includes:

[0338] Gas transmission device 1, heat storage device 10, heating device 20, reaction device 21 and waste heat recovery device 49;

[0339] The gas supply device 1 includes a first gas supply pipe 2 and a second gas supply pipe 3. The first gas supply pipe 2 is connected to the heating device 20, and the second gas supply pipe 3 is connected to the heat storage device 10.

[0340] The gas supply device 1 is used to supply the first carrier gas to the heating device 20 through the first gas supply pipe 2, or the gas supply device 1 is used to supply the first carrier gas to the heat storage device 10 through the second gas supply pipe 3.

[0341] The heating device 20 is connected to the heat storage device 10, and the heating device 20 is used to heat the first carrier gas to obtain the second carrier gas;

[0342] The heat storage device 10 stores heat storage particles, and the heat storage device 10 uses the second carrier gas to heat the heat storage particles to form first high-temperature heat storage particles.

[0343] The heat storage device 10 is also used to heat the first carrier gas that enters it using the first high-temperature heat storage particles to obtain a third carrier gas.

[0344] The reaction device 21 is internally connected to the heat storage device 10. The reaction device 21 is used to receive the third carrier gas and use the heat carried by the third carrier gas to burn cement raw materials to obtain cement clinker. The third carrier gas releases heat to form a fourth carrier gas.

[0345] The waste heat recovery device 49 is internally connected to the reaction device 21. The waste heat recovery device 49 stores the heat storage particles. The waste heat recovery device 49 is used to receive the fourth carrier gas and recover the heat carried by the fourth carrier gas using the heat storage particles.

[0346] In this invention, the gas conveying device 1 is a device for conveying gas. When the gas conveying device 1 delivers the first carrier gas to the heating device 20 via the first gas conveying pipe 2, it indicates that the heat storage device 10 is in a heat storage state. At this time, it is not necessary to deliver the first carrier gas via the second gas conveying pipe 3 to avoid the first carrier gas absorbing heat from the second carrier gas, ensuring rapid heat storage in the heat storage device 10. After the heat storage device 10 has completed heat storage, i.e., the temperature of the heat storage particles rises to the target temperature, the gas conveying device 1 then delivers the first carrier gas to the heat storage device 10 via the second gas conveying pipe 3, causing the heat storage particles to release heat and the first carrier gas to absorb heat. After heating, the obtained third carrier gas is used as a high-temperature heat source. In this invention, when the heat storage particles release heat, the first carrier gas is stopped from being supplied to the heating device 20 along the first gas supply pipe 2 to avoid temperature fluctuations within the heat storage device 10, which would reduce heat transfer efficiency. The first / second / third / fourth carrier gases are gaseous media that can be used for heat absorption / release, including air, nitrogen, etc. The only difference between the first / second / third / fourth carrier gases is their temperature. The temperature of the first carrier gas is 25°C, the temperature of the second carrier gas is 1500°C, the temperature of the third carrier gas is 1450°C, and the temperature of the fourth carrier gas is 850-950°C.

[0347] Heating device 20 is a device that can connect to green energy / renewable energy / off-peak electricity, etc., to convert electrical energy into heat energy for heating the first carrier gas; heating device 20 is set at the bottom of heat storage device 10, so that the first carrier gas enters the heating device 20 from bottom to top for heating; heat storage particles are solid particles that can absorb / release heat, and have the characteristics of high heat storage density, thermal shock resistance, chemical inertness, and low cost; after the heat storage device 10 uses the second carrier gas to heat the heat storage particles, the temperature of the first high-temperature heat storage particles formed is 1500℃; reaction device 21 is a rotary kiln that can be used to burn cement raw materials; waste heat recovery device 49 is a sealed container that can supply a fourth carrier gas to enter and exchange heat with the heat storage particles.

[0348] The specific heat capacity, particle size, volume, etc. of the heat storage particles stored in the waste heat recovery device 49 can be the same as those in the heat storage device 10, or at least one of them may be different; the temperature of the fourth carrier gas after heat release is between 850-950℃. Therefore, the heat storage particles in the waste heat recovery device 49 need to store less heat than the heat storage particles in the heat storage device 10. Heat storage particles with lower cost and lower specific heat capacity can be selected to reduce production costs.

[0349] Cement raw meal is the initial raw material mixture in cement production, which is made by mixing limestone, clay, iron ore and other materials in proportion. Cement clinker is a semi-finished product formed after cement raw meal is calcined at high temperature. Its main components are tricalcium silicate, dicalcium silicate, tricalcium aluminate and tetracalcium aluminoferrite.

[0350] In specific implementation, the first carrier gas is transported to the heating device 20 via the first gas supply pipe 2 using the gas supply device 1. The heating device 20 can be connected to green energy to convert electrical energy into heat energy to heat the first carrier gas, resulting in a second carrier gas. The second carrier gas enters the heat storage device 10 through the heating device 20 and exchanges heat with the heat storage particles to obtain the first high-temperature heat storage particles. Then, the first carrier gas is transported to the heat storage device 10 again via the gas supply device 1 along the second gas supply pipe 3, allowing the first carrier gas to exchange heat with the first high-temperature heat storage particles to obtain a third carrier gas. The third carrier gas is discharged into the reaction device 21, where it begins to release heat. When the reaction device 21 reaches the firing temperature, it begins to fire the cement raw materials input into the reaction device 21 to obtain cement clinker. As the third carrier gas continues to cool down, a fourth carrier gas is obtained. The fourth carrier gas is then transported to the waste heat recovery device 49, where it exchanges heat with the heat storage particles in the waste heat recovery device 49 to recover the residual heat carried by the fourth carrier gas.

[0351] This invention utilizes a thermal storage device 10 to convert intermittent renewable energy into stable thermal energy storage, providing a clean heat source for cement clinker production and significantly reducing dependence on fossil fuels and greenhouse gas emissions. The thermal storage particles can regulate the temperature of the reaction device 21 in real time, ensuring a stable calcination temperature of 1400-1450℃, effectively solving problems such as unstable clinker quality and yellow core material caused by temperature fluctuations in traditional processes. The waste heat recovery device 49 utilizes production waste heat in a closed loop, increasing the system's energy utilization rate by over 50%. This "thermal storage-heat supply-recovery" cycle not only reduces fuel consumption by over 60% but also lowers the defect rate through stable production processes, achieving a dual improvement in economic and environmental benefits.

[0352] In some embodiments, see Figure 4 The gas delivery device 1 includes a fan 5 and multiple valves 8;

[0353] The first gas supply pipe 2 and the second gas supply pipe 3 are respectively connected to the fan 5. The heat storage device 10 is provided with a gas delivery pipe 9. The valves 8 are respectively provided on the first gas supply pipe 2, the second gas supply pipe 3 and the gas delivery pipe 9.

[0354] The valve 8 on the first gas pipeline 2 is used to open when the temperature of the heat storage device 10 is below 1400°C, and the opening and closing state of the valve 8 on the gas delivery pipeline 9 is consistent with the opening and closing state of the valve 8 on the first gas pipeline 2.

[0355] The valve 8 on the second gas pipeline 3 is used to open when the temperature of the heat storage device 10 is higher than 1500°C.

[0356] In this invention, the fan 5 includes two air outlets, which are respectively connected to the first air supply pipe 2 and the second air supply pipe 3, so as to deliver the first carrier gas to the heating device 20 and the heat storage device 10 through the fan 5.

[0357] In this invention, the consistent opening and closing states of valves 8 on the first gas supply pipe 2 and the gas delivery pipe 9 mean that when the temperature of the heat storage device 10 is below 1400°C, the temperature conditions for heating to obtain the third carrier gas are not met. At this time, heat needs to be stored in the heat storage device 10. Therefore, valves 8 on the first gas supply pipe 2 and 8 on the gas delivery pipe 9 are opened at the same time, so that the fan 5 delivers the first carrier gas to the heating device 20 along the first gas supply pipe 2 for heating to obtain the second carrier gas. The second carrier gas enters the heat storage device 10 to exchange heat with the heat storage particles. The second carrier gas after heat exchange is discharged along the gas delivery pipe 9 so that the second carrier gas delivered by the subsequent heating device 20 can continuously enter the heat storage device 10 for heat storage.

[0358] In this invention, when the temperature of the heat storage device 10 is higher than 1500°C, the temperature condition for heating to obtain the third carrier gas is met. At this time, the heat storage device 10 has completed heat storage. Only the valve 8 on the second gas supply pipe 3 needs to be opened to switch the heat storage device 10 to the heat release mode. The fan 5 is used to supply the first carrier gas to the heat storage device 10 to heat and obtain the third carrier gas.

[0359] In specific implementation, valve 8 on the first gas supply pipe 2 and gas delivery pipeline 9 is opened, and fan 5 delivers the first carrier gas along the first gas supply pipe 2 to the heating device 20, where it is heated to obtain the second carrier gas. When the temperature of the heat storage device 10 is below 1400℃, valve 8 on the first gas supply pipe 2 and gas delivery pipeline 9 is kept open until the temperature of the heat storage device 10 is above 1500℃. Then, valve 8 on the first gas supply pipe 2 and gas delivery pipeline 9 is closed, and valve 8 on the second gas supply pipe 3 is opened. Fan 5 delivers the first carrier gas along the second gas supply pipe 3 to the heat storage device 10, allowing the first carrier gas to contact and exchange heat with the first high-temperature heat storage particles to obtain the third carrier gas. The third carrier gas is discharged from the heat storage device 10 and enters the reaction device 21 to provide the heat required for cement clinker burning.

[0360] This invention enables the system to dynamically adjust the gas delivery path according to the temperature of the heat storage device 10 by setting valve 8. When the temperature of the heat storage device 10 is below 1400°C, the first carrier gas is delivered along the first gas delivery pipe 2 to replenish the heat demand in a timely manner; when the temperature of the heat storage device 10 is above 1500°C, the first carrier gas is delivered along the second gas delivery pipe 3 to obtain a high-temperature heat source for cement raw material firing, ensuring efficient heat utilization.

[0361] In some embodiments, see Figure 4 The system also includes a preheating device 43;

[0362] The preheating device 43 is connected to the reaction device 21 and the waste heat recovery device 49 respectively;

[0363] The preheating device 43 is used to receive the fourth carrier gas, preheat the cement raw material entering it with the fourth carrier gas, and transport the preheated cement raw material to the reaction device 21. The fourth carrier gas is cooled to form the fifth carrier gas.

[0364] The waste heat recovery device 49 is used to receive the fifth carrier gas and recover the heat carried by the fifth carrier gas using the heat storage particles.

[0365] In this invention, the preheating device 43 is a sealed container for cement raw materials to enter and exchange heat with the fourth carrier gas. The preheating device 43 includes a multi-stage cyclone preheater or a suspension preheater, etc., to achieve efficient preheating through gas-solid heat exchange. The preheating device 43 is connected to the reaction device 21 by a sealed pipe to avoid heat loss during the process of the preheated cement raw materials entering the reaction device 21. The preheating of the cement raw materials by the fourth carrier gas means that the fourth carrier gas contacts the cement raw materials in the preheating device 43 to transfer heat, so that the cement raw materials are heated to 500-600°C, and the fourth carrier gas is cooled to form a fifth carrier gas with a temperature of 300-500°C. In this system, the fifth carrier gas still carries some heat. In order to reduce heat waste and recover as much waste heat generated by the system as possible, the waste heat recovery device 49 can be used to receive the fifth carrier gas.

[0366] In specific implementation, the fourth carrier gas exits the reaction device 21 and enters the preheating device 43. At the same time, the cement raw material is transported to the preheating device 43, so that the fourth carrier gas and the cement raw material come into contact and exchange heat. The cement raw material is heated to 500-600℃, and the fourth carrier gas is cooled to 300-500℃ to obtain the fifth carrier gas. The fifth carrier gas is then transported to the waste heat recovery device 49, so that the fifth carrier gas comes into contact and exchange heat with the heat storage particles in the waste heat recovery device 49, heating the heat storage particles to 300-400℃ to achieve heat recovery.

[0367] This invention preheats cement raw materials using a fourth carrier gas, ensuring the materials reach a suitable temperature before entering the reaction unit, effectively shortening subsequent firing time and improving production efficiency. Simultaneously, the system utilizes a waste heat recovery device 49 to deeply recover residual heat from the fifth carrier gas using heat storage particles, forming a complete closed-loop heat energy utilization system. Achieving a waste heat recovery rate of over 95%, this significantly improves energy efficiency while solving the environmental thermal pollution problem caused by high-temperature exhaust emissions in traditional processes.

[0368] In some embodiments, see Figure 4 The system also includes a dust removal device 27;

[0369] The dust removal device 27 includes an input end 28, a first output end 29, and a second output end 30. The input end 28 is connected to the interior of the preheating device 43 through a pipe. The first output end 29 is connected to the waste heat recovery device 49. The second output end 30 is connected to the interior of the preheating device 43.

[0370] The dust removal device 27 is used to remove dust from the received fifth carrier gas, transport the dust-removed fifth carrier gas to the waste heat recovery device 49, and return the dust to the preheating device 43.

[0371] In this invention, the dust removal device 27 is a device capable of gas-solid separation, including electrostatic precipitators, bag filters, cyclone separators, etc. The dust removal device 27 needs to withstand high temperatures so that it can maintain stable performance after the fifth carrier gas enters. The input end 28 is a pipe capable of conveying the fifth carrier gas and the dust carried by the fifth carrier gas. The first output end 29 is a pipe capable of conveying the fifth carrier gas. The second output end 30 is a pipe capable of conveying the dust. The second output end 30 of the dust removal device 27 can be connected to the feed port of the preheating device 43 through a sealed pipe to directly send the dust back to the preheating device 43, ensuring that the dust is evenly distributed in the cement raw material inside the preheating device 43. The dust is mainly cement raw material dust, whose chemical composition is consistent with the raw material and can be directly involved in firing without affecting the quality of clinker.

[0372] In specific implementation, the fourth carrier gas exits the reaction device 21 and enters the preheating device 43. At the same time, the cement raw material is transported to the preheating device 43, so that the fourth carrier gas and the cement raw material come into contact and exchange heat to obtain the fifth carrier gas. The fifth carrier gas is then transported to the dust removal device 27 for solid-gas separation. The separated dust is sent back to the preheating device 43 through the second output end 30, mixed with the heated cement raw material, and then enters the reaction device 21 for firing. The dust-removed fifth carrier gas is transported to the waste heat recovery device 49 through the first output end 29, so that the fifth carrier gas comes into contact and exchange heat with the heat storage particles in the waste heat recovery device 49, heating the heat storage particles to 300-400℃. The fifth carrier gas is then cooled to room temperature and discharged.

[0373] This invention purifies the fifth carrier gas using a dust removal device 27 to remove particulate matter and reduce environmental pollution. The collected dust is returned to the preheating device 43 for reuse, reducing raw material waste and solid waste treatment costs. The purified carrier gas then enters the waste heat recovery device 49, avoiding contamination from heat storage particles, thereby extending its service life and improving waste heat recovery efficiency.

[0374] In some embodiments, see Figure 4The waste heat recovery device 49 includes a waste heat storage tank 51 and a recovery pipeline 52;

[0375] One end of the recovery pipe 52 is connected to the first output end 29 of the dust removal device 27, and the other end is connected to the waste heat storage tank 51.

[0376] The recovery pipeline 52 is used to transport the fifth carrier gas after dust removal to the waste heat storage tank 51;

[0377] The waste heat storage tank 51 is used to receive the fifth carrier gas after dust removal and to recover the heat carried by the fifth carrier gas after dust removal using the heat storage particles.

[0378] In this invention, the waste heat storage tank 51 is a device for solid-gas heat exchange; the recovery pipeline 52 is a pipeline capable of transporting high-temperature gas; the inner layer of the waste heat storage tank 51 can be made of high-temperature resistant material, and the outer layer can be made of heat insulation material to reduce heat loss; the heat storage particles inside the waste heat storage tank 51 can be selected as heat storage particles with high heat storage density and high temperature resistance, and the heat storage particles must have high thermal conductivity, thermal shock resistance and chemical stability to adapt to repeated heating-cooling cycles.

[0379] In practice, the fifth carrier gas is transported to the dust removal device 27 for solid-gas separation. The dust-removed fifth carrier gas is then transported to the waste heat storage tank 51 through the recovery pipeline 52, so that the fifth carrier gas can contact and exchange heat with the heat storage particles in the waste heat storage tank 51.

[0380] This invention introduces the purified fifth carrier gas into the waste heat storage tank 51 through the recovery pipe 52, utilizing the heat storage particles to fully absorb the waste heat, significantly improving the system's heat recovery rate. The waste heat storage tank 51, as a thermal energy buffer unit, effectively enhances the stability of system operation through a "heat storage-heat release" cycle.

[0381] In some embodiments, see Figure 4 A valve 8 can be installed on the recovery pipeline 52. When opened, the recovery pipeline 52 is opened to allow the fifth carrier gas to enter the waste heat storage tank 51; when closed, the fifth carrier gas is prohibited from entering the waste heat storage tank 51.

[0382] In some embodiments, see Figure 4 An induced draft fan 521 can be installed on the recovery pipe 52. The fifth carrier gas after dust removal is blown into the recovery pipe 52 by the induced draft fan 521 to increase the power of the fifth carrier gas and speed up the transmission efficiency.

[0383] In some embodiments, see Figure 4A heating device 20 and a gas transmission device 1 can be installed on the waste heat recovery device 49. The gas transmission device 1 includes a first gas transmission pipe 2 and a second gas transmission pipe 3, as well as a fan 5 and multiple valves. The first gas transmission pipe 2 and the second gas transmission pipe 3 are respectively connected to the fan 5. The end of the first gas transmission pipe 2 away from the fan is connected to the heating device 20, and the end of the second gas transmission pipe 3 away from the fan 5 is connected to the waste heat storage tank 51. A gas transmission pipeline 9 can be installed on the waste heat storage tank 51, and valves 8 are respectively installed on the first gas transmission pipe 2, the second gas transmission pipe 3 and the gas transmission pipeline 9.

[0384] Specifically, valve 8 on the first gas pipeline 2 is used to open when the temperature of the waste heat storage tank 51 is below 1400°C, and the opening and closing state of valve 8 on the gas delivery pipeline 9 is consistent with that of valve 8 on the first gas pipeline 2; valve 8 on the second gas pipeline 3 is used to open when the temperature of the waste heat storage tank 51 is above 1500°C; a pipeline connection is provided between the heat release port of the waste heat storage tank 51 and the reaction device 21.

[0385] In specific implementation, the valves 8 on the first gas supply pipe 2 and the gas delivery pipeline 9, and the fan 5 deliver the first carrier gas along the first gas supply pipe 2 to the heating device 20 for heating to obtain the second carrier gas. When the temperature of the waste heat storage tank 51 is below 1400℃, the valves 8 on the first gas supply pipe 2 and the gas delivery pipeline 9 are kept open. Until the temperature of the waste heat recovery device 49 is above 1500℃, the valves 8 on the first gas supply pipe 2 and the gas delivery pipeline 9 are closed, and the valves 8 on the second gas supply pipe 3 are opened. The fan 5 delivers the first carrier gas along the second gas supply pipe 3 to the waste heat storage tank 51, so that the first carrier gas and the heat storage particles in the waste heat storage tank 51 can exchange heat to obtain the third carrier gas. After the third carrier gas is discharged from the waste heat storage tank 51, it enters the reaction device 21 to provide the heat required for the burning of cement raw materials.

[0386] This invention enables the waste heat recovery device 49 to have independent heating capabilities by configuring the same gas supply device 1 and heating device 20. When the heat supply of the heat storage device 10 is insufficient, the waste heat recovery device 49 can replenish the heat in time, ensuring the continuous and stable operation of the system. This not only maintains the uniform temperature distribution within the reaction device 21 and achieves precise temperature control, but also significantly reduces clinker quality fluctuations and effectively improves the performance indicators of cement products.

[0387] In some embodiments, see Figure 4 The heat storage device 10 includes a first heat storage tank 11 and a tail gas recovery pipe 31;

[0388] The exhaust gas recovery pipe 31 is connected to the first heat storage tank 11 and the recovery pipe 52 respectively;

[0389] The first heat storage tank 11 is connected to the heating device 20 and the reaction device 21 respectively, and the tail gas recovery pipe 31 is used to receive the fifth carrier gas after dust removal transported by the recovery pipe 52.

[0390] The first heat storage tank 11 is used to enable the heat storage particles to recover the heat carried by the fifth carrier gas after dust removal.

[0391] In this invention, the first thermal storage tank 11 can adopt a double-layer insulation design, with the inner layer being a high-temperature resistant material, such as stainless steel or ceramic, and the outer layer being an insulation material, such as rock wool or aluminum silicate fiber, to reduce heat loss. An airflow distributor can be installed inside the first thermal storage tank 11 to ensure that the first / second / third / fifth carrier gases pass evenly through the thermal storage particle layer, improving the heat conversion rate and recovery rate. An inlet can be provided at the top of the first thermal storage tank 11, through which the thermal storage particles can be evenly filled into the storage space. The filling method for the thermal storage particles can be vibration-assisted or airflow-assisted filling to ensure uniform distribution of the particles and avoid gaps. An outlet can be provided at the bottom of the first thermal storage tank 11 for convenient periodic replacement or cleaning of the thermal storage particles.

[0392] The exhaust gas recovery pipe 31 can be made of high-temperature and corrosion-resistant materials, including stainless steel or heat-resistant alloys; fins or concave-convex structures can be provided on the surface of the exhaust gas recovery pipe 31 to further improve heat transfer efficiency.

[0393] In one scenario, when there is a heat surplus, i.e., when the reaction device 21 has completed cement firing, or when the temperature inside the first heat storage tank 11 drops below 1400°C, the fifth carrier gas is transported to the first heat storage tank 11 through the recovery pipe 52 and the tail gas recovery pipe 31, and the heat of the fifth carrier gas is stored in the heat storage particles inside the first heat storage tank 11.

[0394] In one scenario, when there is insufficient heat, i.e., when the reaction device 21 starts firing or is firing cement raw materials, it is necessary to release the heat in the first heat storage tank 11 to heat the first carrier gas. At this time, the fifth carrier gas is transported to the first heat storage tank 11 through the tail gas recovery pipe 31, so that the heat storage particles in the first heat storage tank 11 are heated to achieve heat replenishment, ensuring that the first heat storage tank 11 can continuously release heat and ensure that the firing process proceeds smoothly.

[0395] In practice, the fifth carrier gas after dust removal enters the recovery pipe 52. A portion of it is transported along the recovery pipe 52 to the waste heat storage tank 51, where the fifth carrier gas contacts and exchanges heat with the heat storage particles placed in the waste heat storage tank 51, heating the heat storage particles to 300-400°C. The fifth carrier gas is then cooled to 300-500°C and discharged from the waste heat storage tank 51. The other portion is transported along the recovery pipe 52 to the tail gas recovery pipe 31, and then along the tail gas recovery pipe 31 to the first heat storage tank 11, where it exchanges heat with the heat storage particles in the first heat storage tank 11 to recover the heat from the fifth carrier gas.

[0396] By setting up the exhaust gas recovery pipe 31, the present invention ensures that the fifth carrier gas can still fully contact the heat storage particles in the first heat storage tank 11, thereby maximizing waste heat recovery and reducing heat loss.

[0397] In some embodiments, see Figure 4 A shut-off valve 311 is provided on the connecting pipe between the exhaust gas recovery pipe 31 and the recovery pipe 52;

[0398] The shut-off valve 311 is used to open when the temperature of the first heat storage tank 11 is below 500°C.

[0399] In this invention, a temperature sensor and a control device may be installed on the first heat storage tank 11. The temperature sensor is used to transmit a temperature signal to the control device 53, and the control device 53 is used to receive the temperature signal. When the temperature is below 500°C, the control device opens the shut-off valve 311 to allow the fifth carrier gas to enter the first heat storage tank 11 to recover heat. When the temperature reaches the set upper limit, such as 800°C, the control device closes the shut-off valve 311 to stop the heat recovery in the first heat storage tank 11.

[0400] In specific implementation, when the temperature of the first heat storage tank 11 is below 500°C, it indicates that the temperature is below the requirement to provide heat to the reaction device 21. At this time, the first heat storage tank 11 stops releasing heat and enters the heat storage stage. The shut-off valve 311 is opened so that the fifth carrier gas enters the tail gas recovery pipe 31 through the recovery pipe 52 and then enters the first heat storage tank 11 through the tail gas recovery pipe 31 to contact the heat storage particles for heat exchange.

[0401] When the temperature of the first heat storage tank 11 is higher than 800℃, there are two situations. In one situation, the first heat storage tank 11 is in the heat storage stage and is heated by the second carrier gas. At this time, the shut-off valve 311 is closed to prevent the fifth carrier gas from entering the first heat storage tank 11 and disturbing the temperature distribution inside the first heat storage tank 11. In the other situation, the first heat storage tank 11 is in the heat release stage and is transported to the reaction device 21 by the third carrier gas as a high-temperature heat source. At this time, in order to avoid uneven temperature distribution, the shut-off valve 311 can also be closed to prevent the fifth carrier gas from entering the first heat storage tank 11.

[0402] In this invention, the first valve 8 opens when the temperature of the first heat storage tank 11 is below 500°C, ensuring that the heat storage particles can efficiently absorb the residual heat of the fifth carrier gas and avoid heat waste. The control of the shut-off valve 311 enables the first heat storage tank 11 to replenish heat in a timely manner when it is insufficient, maintaining the thermal energy balance of the system, improving the system's operational stability, and precisely controlling heat recovery. This ensures that the temperature of the heat storage particles in the first heat storage tank 11 is already relatively high before heat storage, reducing the energy dependence on the heating device 20 and further reducing production costs.

[0403] In some embodiments, see Figure 4 The system also includes an exhaust gas recovery device 48;

[0404] The exhaust gas recovery device 48 and the exhaust gas outlet 50 provided on the waste heat recovery device 49 are connected by a pipeline.

[0405] The exhaust gas recovery device 48 is used to receive the fifth carrier gas after heat recovery from the exhaust gas outlet 50.

[0406] In this invention, the fifth carrier gas after heat recovery is a gaseous medium cooled to 300-400°C after exchanging heat with the heat storage particles in the waste heat recovery device 49; the tail gas recovery device 48 is used to recover the fifth carrier gas cooled to 300-400°C; other heat energy conversion media can also be set inside to further recover the residual heat in the fifth carrier gas and convert it into usable energy, such as hot water, steam or electricity; the tail gas outlet 50 is opened on the waste heat storage tank 51, and the tail gas recovery device 48 is connected to the tail gas outlet 50 on the waste heat storage tank 51 through a pipeline.

[0407] In practice, after dust removal, the fifth carrier gas is transported to the waste heat recovery device 49, so that the fifth carrier gas comes into contact with the heat storage particles in the waste heat recovery device 49 for heat exchange. After the fifth carrier gas is cooled down, it is discharged into the waste gas recovery device 48 through the tail gas outlet 50 for recovery.

[0408] The present invention processes the fifth carrier gas discharged from the waste heat recovery device 49 by the exhaust gas recovery device 48, thereby reducing environmental thermal pollution and further recovering residual heat for use in other process steps, realizing multi-level utilization of thermal energy and significantly improving the overall energy efficiency of the system.

[0409] In some embodiments, see Figure 4 The first heat storage tank 11 can be equipped with the same exhaust gas outlet 50, and the exhaust gas outlet 50 is connected to the exhaust gas recovery device 48 through a pipeline. In specific implementation, the fifth carrier gas that has undergone heat exchange in the first heat storage tank 11 can be discharged into the exhaust gas recovery device 48 for recovery after cooling down.

[0410] In some embodiments, see Figure 4 A valve 8 is also installed on the connecting pipe between the heat storage device 10 and the reaction device 21;

[0411] The valve 8 on the connecting pipe between the heat storage device 10 and the reaction device 21 is used to close when the temperature of the heat storage device 10 is below 1400°C and to open when the temperature of the heat storage device 10 is above 1500°C.

[0412] In specific implementation, when the temperature of the heat storage device 10 is below 140°C, the heat storage device 10 is in the heat storage stage. At this time, valve 8 is closed to reduce heat loss through the connecting pipe between the heat storage device 10 and the reaction device 21, so that the heat storage device 10 can quickly complete the heat storage process and reduce heat waste.

[0413] When the temperature of the heat storage device 10 is higher than 1500℃, it indicates that the heat storage of the heat storage device 10 is completed and the heat storage particles inside it can meet the heat requirements for firing. At this time, valve 8 is opened to deliver the third carrier gas to the reaction device 21. The cement raw materials inside are fired with the help of the heat carried by the third carrier gas to obtain cement clinker.

[0414] This invention ensures efficient heat transfer by installing a valve 8 on the connecting pipe between the heat storage device 10 and the reaction device 21. When the temperature of the heat storage device 10 is below 1400℃, low-temperature heat is prevented from entering the reaction device 21, thus affecting the calcination efficiency. When the temperature of the heat storage device 10 is above 1500℃, high-temperature heat is transferred to the reaction device 21 to meet the calcination requirements.

[0415] In some embodiments, the heat storage particles are selected from white corundum, quartz sand, alumina, magnesium oxide, zirconium oxide, carbon particles, and silicon carbide.

[0416] This invention utilizes high-density thermal energy storage granular materials, enabling stable storage and efficient release of thermal energy under high-temperature conditions. The system supports the flexible selection of various thermal energy storage granular materials and can be optimized according to different process requirements and economic constraints, significantly improving the system's thermal energy utilization efficiency and adaptability to various operating conditions.

[0417] In related technologies, carbonate decomposition processes face significant challenges in energy efficiency and quality control. This high-temperature reaction process needs to be carried out continuously at 800-900℃. Traditional methods using fossil fuels for heating are not only energy-intensive and produce large carbon emissions, but also involve significant heat waste, with nearly half of the residual heat failing to be effectively recovered and utilized. More importantly, due to factors such as uneven temperature distribution in the heating system and limitations in heat transfer efficiency, it is often difficult to maintain a stable reaction temperature range in actual production. This not only reduces the reaction rate but also directly affects the completeness of the decomposition reaction and the quality of the final product, causing fluctuations in product performance. These problems severely restrict the economic benefits and environmental sustainability of carbonate decomposition processes.

[0418] To address the problems existing in the aforementioned related technologies, this invention provides a thermal energy storage integrated system based on high-temperature thermochemical conversion. (See [link to related document]). Figure 5 The system includes:

[0419] Gas transmission device 1, heat storage device 10, heating device 20 and reaction device 21;

[0420] The gas supply device 1 is connected to the interior of the heating device 20 and the heat storage device 10 respectively, and the gas supply device 1 is configured to supply a first carrier gas to the heating device 20 and / or the heat storage device 10.

[0421] The heating device 20 is internally connected to the heat storage device 10. The heating device 20 is configured to heat the first carrier gas entering it to obtain a second carrier gas and deliver the second carrier gas to the heat storage device 10.

[0422] The heat storage device 10 stores heat storage particles inside, and the heat release end of the heat storage device 10 is connected to the inside of the reaction device 21.

[0423] The heat storage device 10 is configured such that after the second carrier gas exchanges heat with the heat storage particles, the heat storage particles heat up to form a high-temperature heat source.

[0424] The heat storage device 10 is further configured to use the high-temperature heat source to heat the first carrier gas entering it, obtain a third carrier gas, and deliver the third carrier gas to the reaction device 21;

[0425] The reaction apparatus 21 is configured to absorb the heat carried by the third carrier gas with carbonate to carry out a thermal decomposition reaction, thereby obtaining decomposition products and carbon dioxide.

[0426] In this invention, the gas delivery device 1 is provided with an air inlet, and the air inlet is connected to a component such as a pipe that can supply the first carrier gas. The heat storage device 10 and the heating device 20 are also provided with air inlets. The end of the above-mentioned component away from the gas delivery device 1 is fixedly connected to the air inlet on the heat storage device 10 and the heating device 20 respectively, so that the gas delivery device 1 can deliver the first carrier gas to the heat storage device 10 and the heating device 20 respectively.

[0427] The gas flow rate of the first carrier gas delivered by the gas delivery device 1 is 60 Nm³ / h-240 Nm³ / h. Sealing components can be installed at the connections between the gas delivery device 1, the heat storage device 10, and the heating device 20. This reduces leakage of the first carrier gas and minimizes heat loss through the connections. The heating power of the heating device 20 is related to its volume; for example, it can be set between 12-18.6 kW. The heat storage particles can be made of materials with high heat capacity and high thermal conductivity, and can also be wrapped with insulating materials. The first carrier gas and the heat storage particles exchange heat through direct contact, further improving heat exchange efficiency compared to traditional methods. The heat storage particles occupy 60-80% of the volume in the heat storage device 10. This volume control ensures gaps between the particles for fluidized heat transfer. The high-temperature heat source refers to the heat storage particles that have absorbed sufficient heat and are stored in the heat storage device 10.

[0428] The only difference between the first, second, and third carrier gases mentioned above is their temperature. The temperature of the first carrier gas is below 50°C, the temperature of the second carrier gas is 800-1700°C, and the temperature of the third carrier gas is 300-1500°C.

[0429] The reaction device 21 refers to a reactor or thermal decomposition furnace for the thermal decomposition of carbonates; the energy source of the heating device 20 can be clean energy such as solar energy or wind energy, or off-peak electricity.

[0430] The thermal decomposition reaction of carbonates refers to the chemical reaction in which carbonates decompose into metal oxides and carbon dioxide under heating conditions. Carbonates include barium carbonate, magnesium carbonate, calcium carbonate, etc. Different carbonates have different thermal decomposition temperatures. For example, the decomposition temperature of barium carbonate is 1450℃, that of magnesium carbonate is 350℃, and that of calcium carbonate is 825℃.

[0431] In practice, the gas supply device 1 is activated to deliver the first carrier gas to the heating device 20 for heating, thereby obtaining the second carrier gas. The second carrier gas is then delivered to the heat storage device 10, where it exchanges heat with the heat storage particles, raising their temperature and creating a high-temperature heat source. The delivery of the first carrier gas to the heating device 20 is then stopped, and the gas supply device 1 is used to deliver the first carrier gas to the heat storage device 10, allowing it to exchange heat with the heated heat storage particles to obtain the third carrier gas, which lowers the temperature of the heat storage particles. The obtained third carrier gas is then sent from the heat storage device 10 to the reaction device 21, where the carbonate entering the reaction device 21 exchanges heat with the third carrier gas (i.e., the high-temperature heat source). Once the carbonate reaches the temperature required for thermal decomposition, thermal decomposition begins, yielding decomposition products and carbon dioxide.

[0432] This invention utilizes a high-temperature thermal storage system comprised of a thermal storage device 10, a gas transmission device 1, and a heating device 20. This system stores heat when energy resources are abundant (such as during periods of plentiful renewable energy like solar and wind power) and provides heat when carbonate decomposition requires heat, thereby reducing energy waste and preventing production interruptions or efficiency reductions due to energy intermittency. The coupled application of this thermal storage system not only significantly reduces fossil fuel consumption and greenhouse gas emissions but also buffers temperature fluctuations, ensuring that the carbonate thermal decomposition reaction proceeds within a stable temperature range, effectively solving problems such as incomplete reactions or product quality degradation caused by temperature fluctuations.

[0433] In some embodiments, the heat storage particles are selected from one of white fused alumina, quartz sand, alumina, magnesium oxide, zirconium oxide, carbon particles, and silicon carbide. Specifically, when the carbonate decomposition temperature is below 1000°C, quartz sand is used as the heat storage particles, and when it is above 1000°C, white fused alumina is used.

[0434] In some embodiments, see Figure 5 The heat storage device 10 includes a first heat storage tank 11 and a second heat storage tank 15, and both the first heat storage tank 11 and the second heat storage tank 15 store the heat storage particles.

[0435] The first heat storage tank 11 and the second heat storage tank 15 are respectively provided with heat release ports 12, and the heat release ports 12 are respectively connected to the inside of the reaction device 21;

[0436] The gas delivery device 1 is connected to the interior of the first heat storage tank 11 and the second heat storage tank 15 respectively; the heating device 20 is connected to the interior of the first heat storage tank 11 and the second heat storage tank 15 respectively.

[0437] The gas delivery device 1 is configured to deliver the first carrier gas to the first heat storage tank 11 and the second heat storage tank 15 respectively; the heating device 20 is configured to deliver the second carrier gas to the first heat storage tank 11 and the second heat storage tank 15 respectively.

[0438] In this invention, the volume and material of the first heat storage tank 11 and the second heat storage tank 15 can be the same or different; the volume, type, melting point, specific heat capacity, etc. of the heat storage particles stored in the two heat storage tanks can be exactly the same or at least one of them can be different; a third gas supply pipe 4 is connected to the heat release port 12 on the first heat storage tank 11 and the second heat storage tank 15, and the other end of the third gas supply pipe 4 is connected to the inside of the reaction device 21 to transport the third carrier gas in the first heat storage tank 11 and the second heat storage tank 15 to the reaction device 21 to heat the carbonate;

[0439] In one scenario, when the heat storage particles in the first heat storage tank 11 are the same as those in the second heat storage tank 15, after introducing the second carrier gas, the heat storage particles in the first heat storage tank 11 and the second heat storage tank 15 are heated to the same temperature. During the heat release stage, the first carrier gas is simultaneously supplied to the first heat storage tank 11 and the second heat storage tank 15 using the gas supply device 1, allowing the first carrier gas to enter the first heat storage tank 11 and the second heat storage tank 15 respectively to exchange heat with the heat storage particles, thereby obtaining the third carrier gas at the same temperature. This allows both the first heat storage tank 11 and the second heat storage tank 15 to serve as high-temperature heat sources. Then, the third carrier gas from the first heat storage tank 11 and the second heat storage tank 15 is simultaneously supplied to the reaction device 21 to provide heat for the thermal decomposition reaction. Compared to using only one heat storage device 10, the heating rate is faster, which helps to accelerate the thermal decomposition reaction rate and improve production efficiency.

[0440] In one of the above scenarios, the third carrier gas with the same temperature in the first heat storage tank 11 and the second heat storage tank 15 can also be delivered to the reaction device 21. For example, the third carrier gas in the first heat storage tank 11 can be delivered to the reaction device 21 to provide heat. When the heat is insufficient, the third carrier gas in the second heat storage tank 15 can be delivered to the reaction device 21 to continue to provide heat, so as to ensure that the thermal decomposition reaction can proceed continuously and stably.

[0441] In one scenario, when the heat storage particles in the first heat storage tank 11 are the same as those in the second heat storage tank 15, after introducing the second carrier gas, the heat storage particles in the first heat storage tank 11 and the second heat storage tank 15 are heated to different temperatures. For example, the temperature of the heat storage particles in the first heat storage tank 11 is higher than that in the second heat storage tank 15, or vice versa. During the heat release phase, the first carrier gas is simultaneously supplied to the first heat storage tank 11 and the second heat storage tank 15 using the gas supply device 1, allowing the first carrier gas to enter the first heat storage tank 11 and the second heat storage tank 15 respectively to exchange heat with the heat storage particles, thereby obtaining third carrier gas at different temperatures. This allows either the first heat storage tank 11 or the second heat storage tank 15 to act as a high-temperature heat source, while the remaining heat storage device 10 acts as a medium-temperature heat source. Then, the third carrier gas in the high-temperature heat source is first... The carrier gas is delivered to the reaction device 21 to provide heat. When the heat is insufficient, the third carrier gas from the medium-temperature heat source is delivered to the reaction device 21 to supplement the heat, ensuring that the thermal decomposition reaction can proceed continuously and stably. Since the heat required for supplementary heating is relatively small, it is not necessary to heat the first carrier gas in both heat storage devices 10 to a high temperature. This arrangement is beneficial for energy saving. In the above-mentioned case, the heat storage particles in the first heat storage tank 11 are different from those in the second heat storage tank 15. After the second carrier gas is introduced, the heat storage particles in the first heat storage tank 11 and the second heat storage tank 15 are heated to different temperatures. Since the heat required for supplementary heating is relatively small, it is not necessary to set the heat storage particles in the two heat storage devices 10 to be the same. Heat storage particles with corresponding specific heat capacity can be set according to the heat to be stored.

[0442] In specific implementation, the first carrier gas is delivered to the heating device 20 by the gas delivery device 1, and the first carrier gas is heated to obtain the third carrier gas; then the third carrier gas is delivered to the first heat storage tank 11 and the second heat storage tank 15 respectively to heat the heat storage particles in the two heat storage tanks; then the first carrier gas is delivered to the first heat storage tank 11 and the second heat storage tank 15 by the gas delivery device 1 again, so that the heat storage particles heat the first carrier gas, and the third carrier gas is obtained in each device respectively; then the third carrier gas is delivered to the reaction device 21 along the heat release port 12 on each device to provide heat for the thermal decomposition reaction.

[0443] This invention achieves alternating heat storage and release by setting up a first heat storage tank 11 and a second heat storage tank 15. When the first heat storage tank 11 releases heat to supply energy, the second heat storage tank 15 can simultaneously store heat, ensuring that the reaction device 21 continuously receives high-temperature carrier gas and avoiding energy supply fluctuations caused by interruptions in heat storage in a single heat storage system. When both heat storage tanks release heat simultaneously, a large amount of carrier gas can be quickly provided to meet high production capacity requirements; when one tank is operating, the other tank can store heat or keep warm to reduce energy consumption (such as during low-demand periods at night). If one heat storage tank fails, the other tank can still supply energy independently, ensuring continuous operation of the system.

[0444] In some embodiments, see Figure 5A valve 8 can be installed on the pipe connecting the heat release port 12 on the first heat storage tank 11 and the second heat storage tank 15 to the inside of the reaction device 21. When the gas supply device 1 supplies the first carrier gas to the heating device 20, the valve 8 between the heat release port 12 and the reaction device 21 is closed to prevent the low-temperature first carrier gas from entering the reaction device 21. When supplying the third carrier gas, the valve 8 is opened to ensure that the third carrier gas can smoothly enter the reaction device 21 to provide heat.

[0445] In some embodiments, see Figure 5 The gas delivery device 1 includes a fan 5 and multiple valves 8;

[0446] The air outlet of the fan 5 is connected to a first air supply pipe 2 and a second air supply pipe 3. The end of the first air supply pipe 2 away from the fan 5 is connected to the heating device 20, and the end of the second air supply pipe 3 away from the fan 5 is connected to the heat storage device 10. The heat storage device 10 is provided with a gas delivery pipe 9.

[0447] The valves 8 are respectively installed on the first gas pipeline 2, the second gas pipeline 3 and the gas conveying pipeline 9;

[0448] The valve 8 is configured such that when the first gas supply pipe 2 supplies the first carrier gas, the valve 8 on the first gas supply pipe 2 is in an open state, the valve 8 on the second gas supply pipe 3 is in a closed state, and the opening and closing state of the valve 8 on the gas supply pipeline 9 is the same as the opening and closing state of the valve 8 on the first gas supply pipe 2.

[0449] When the first carrier gas is being delivered through the second gas delivery pipe 3, the valve 8 on the first gas delivery pipe 2 is in a closed state, and the valve 8 on the second gas delivery pipe 3 is in an open state.

[0450] In practice, firstly, open valve 8 on the first gas supply pipe 2 and the gas delivery pipeline 9, close valve 8 on the second gas supply pipe 3, start the fan 5, and the fan 5 delivers the first carrier gas through the first gas supply pipe 2 to the heating device 20 for heating to obtain the second carrier gas; then, the second carrier gas is delivered to the first heat storage tank 11 and the second heat storage tank 15 respectively to exchange heat with the heat storage particles; after the heat exchange is completed, close valve 8 on the first gas supply pipe and the gas delivery pipeline 9, open valve 8 on the second gas supply pipe 3, and the fan 5 delivers the first carrier gas along the second gas supply pipe 3 to the heat storage device 10 to exchange heat with the heat storage particles to obtain the third carrier gas.

[0451] This invention enables rapid adjustment of the carrier gas delivery path through valve 8 switching. When the system requires rapid heating, valve 8 on the first gas delivery pipe 2 and the gas delivery pipeline 9 is opened, while valve 8 on the second gas delivery pipe 3 is closed. The first carrier gas enters the heating device 20 directly through the first gas delivery pipe 2 for rapid heating to meet emergency energy supply needs. When the system needs heat storage or to utilize heat storage particles for energy, valve 8 on the first gas delivery pipe 2 and the gas delivery pipeline 9 is closed, while valve 8 on the second gas delivery pipe 3 is opened. The first carrier gas enters the heat storage device 10 through the second gas delivery pipe 3 to exchange heat with the heat storage particles and then heat up for use in the decomposition reaction. This setting significantly improves the system response speed and can flexibly adapt to different operating conditions.

[0452] In some embodiments, see Figure 5 When the system is equipped with a first heat storage tank 11 and a second heat storage tank 15, the heating device 20 may include two heaters, which are respectively installed on the first heat storage tank 11 and the second heat storage tank 15; the two heaters may be connected to the interior of the gas delivery device 1, so that the gas delivery device 1 delivers the first carrier gas to the two heaters respectively.

[0453] The gas supply device 1 may include two fans 5, each fan 5 being equipped with a first gas supply pipe 2 and a second gas supply pipe 3. One first gas supply pipe 2 connects the fan 5 to the heating device 20 on the first heat storage tank 11, and the other first gas supply pipe 2 connects the fan 5 to the heating device 20 on the second heat storage tank 15. One second gas supply pipe 3 connects the fan 5 to the first heat storage tank 11, and the other second gas supply pipe 3 connects the fan 5 to the second heat storage tank 15. In this invention, through the above arrangement, both the first heat storage tank 11 and the second heat storage tank 15 can operate independently, thereby improving the flexibility of the system.

[0454] In some embodiments, see Figure 5 The system also includes a control device 53;

[0455] The control device 53 is configured to open the valve 8 on the first gas pipeline 2 and the valve 8 on the gas delivery pipeline 9, and close the valve 8 on the second gas pipeline 3 when the temperature of the heat storage device 10 is below 800°C.

[0456] When the temperature of the heat storage device 10 is not lower than 800°C, the valve 8 on the first gas supply pipe 2 and the valve 8 on the gas supply pipeline 9 are closed, and the valve 8 on the second gas supply pipe 3 is opened.

[0457] In this invention, the control device 53 is a device or system for automatically monitoring and regulating the operating status of the system; its core function is to automatically execute corresponding operations by collecting data in real time (such as temperature, pressure, flow rate, etc.) and according to preset logic or algorithms to ensure that the system operates efficiently and stably.

[0458] When the temperature of the thermal storage device 10 is below 800℃, it indicates that energy storage is not yet complete. At this time, it is still necessary to keep the valve 8 on the first gas supply pipe 2 and the gas supply pipeline 9 open and the valve 8 on the second gas supply pipe 3 closed until energy storage is complete. When the temperature of the thermal storage device 10 is not lower than 800℃, it indicates that energy storage is complete. At this time, the valve 8 on the first gas supply pipe 2 and the gas supply pipeline 9 can be closed and the valve 8 on the second gas supply pipe 3 can be opened to heat the first carrier gas and obtain the third carrier gas.

[0459] In specific implementation, the control device 53 controls the valves 8 on the first gas supply pipe 2 and the gas delivery pipeline 9 to open, while keeping the valve 8 on the second gas supply pipe 3 closed. The fan 5 is started, and the fan 5 delivers the first carrier gas through the first gas supply pipe 2 to the heating device 20, where it is heated to obtain the second carrier gas. The second carrier gas is then delivered to the first heat storage tank 11 and the second heat storage tank 15 respectively to exchange heat with the heat storage particles, forming a high-temperature heat source or a medium-temperature heat source. When the control device 53 receives a temperature of the heat storage device 10 below 800°C, it keeps the valves 8 on the first gas supply pipe 2 and the gas delivery pipeline 9 open, while keeping the valve 8 on the second gas supply pipe 3 closed. After the heat exchange is completed, when the control device 53 receives a temperature of the heat storage device 10 not lower than 800°C, it controls the opening of the valve 8 on the second gas supply pipe 3, and the fan 5 delivers the first carrier gas along the second gas supply pipe 3 to the heat storage device 10 to exchange heat with the heat storage particles, obtaining the third carrier gas.

[0460] This invention optimizes the operation of the thermal storage system by adjusting valve switching through control device 53. When the temperature of the thermal storage device 10 is below 800℃, valves 8 on the first gas delivery pipe 2 and the gas delivery pipeline 9 are automatically opened, allowing the first carrier gas to enter the heating device 20 through the first gas delivery pipe 2 for rapid heating and to supplement the thermal storage device. When the temperature reaches or exceeds 800℃, valve 8 on the second gas delivery pipe 3 is switched to open, allowing the carrier gas to exchange heat with the thermal storage particles through the second gas delivery pipe 3 for use in the decomposition reaction, ensuring a stable reaction temperature and improving product quality. The system can also be adjusted according to energy supply and demand. For example, during periods of low electricity prices or when there is a surplus of wind and solar power, the heating device 20 can be used to store heat to replace fossil fuels; during periods of high electricity prices or in case of emergency, the thermal storage device is prioritized for energy supply, which reduces the consumption of non-renewable energy and ensures the reliability of energy supply.

[0461] In some embodiments, see Figure 5 The system also includes a temperature sensor 54;

[0462] The temperature sensor 54 is disposed on the heat storage device 10 and is configured to detect the temperature inside the heat storage device 10 and transmit a temperature signal to the control device 53.

[0463] In this invention, the temperature sensor 54 is a device for measuring the temperature of an object or the environment, capable of converting temperature signals into electrical signals or other readable signals and transmitting them to the control device 53.

[0464] In practice, a temperature sensor 54 is installed on the thermal storage device 10 to monitor the temperature of the thermal storage particles in real time and transmit the temperature signal to the control device 53. Based on the feedback data from the temperature sensor 54, the control device 53 dynamically adjusts the state of the valve 8, i.e., opens or closes the valve 8, to ensure that the temperature of the thermal storage device 10 remains stable within the target range, thus preventing heat waste. When the temperature of the thermal storage device 10 is below 800℃, the control device 53 uses the heating device 20 to supplement the heat; when the temperature reaches or exceeds 800℃, the thermal storage device 10 is used to supply energy, improving thermal energy utilization and enhancing system operational stability.

[0465] In some embodiments, see Figure 5 The reaction device 21 is provided with a first gas outlet pipe 38;

[0466] The first vent pipe 38 is connected to the interior of the heat storage device 10; a carbon dioxide utilization device 39 is connected to the outlet of the heat storage device 10.

[0467] The reaction device 21 is also configured to discharge the carbon dioxide along the first outlet pipe 38 into the heat storage device 10, so that the carbon dioxide exchanges heat with the heat storage particles and stores the heat carried by the carbon dioxide.

[0468] The carbon dioxide utilization device 39 is configured to receive the cooled carbon dioxide.

[0469] In this invention, when the system includes a first heat storage tank 11 and a second heat storage tank 15, the first vent pipe 38 is provided with two branch pipes, which are respectively connected to the interior of the first heat storage tank 11 and the second heat storage tank 15 through the two branch pipes, so that the reaction device 21 can respectively transport the generated carbon dioxide to the first heat storage tank 11 and the second heat storage tank 15; valves 8 can be respectively provided on the connecting pipes between the first vent pipe 38 and the first heat storage tank 11 and the second heat storage tank 15.

[0470] In one case, when the first heat storage tank 11 or the second heat storage tank 15 is still filled with the first carrier gas, one of the valves 8 needs to be closed so that carbon dioxide can only enter the first heat storage tank 11 or the second heat storage tank 15 without the first carrier gas through the first outlet pipe 38, so as to avoid the carbon dioxide from mixing with the first carrier gas and increasing the difficulty of subsequent separation.

[0471] In one case, when the first carrier gas is not introduced into the first heat storage tank 11 and the second heat storage tank 15, all valves 8 installed on the second gas outlet pipe 40 need to be opened so that carbon dioxide can enter the first heat storage tank 11 and the second heat storage tank 15 through the first gas outlet pipe 38, so as to improve the carbon dioxide heat recovery efficiency.

[0472] Since the thermal decomposition reaction is an exothermic reaction, the generated carbon dioxide is at a high temperature. To prevent this heat from being lost, the present invention provides a first outlet pipe 38 to transport the high-temperature carbon dioxide to the first heat storage tank 11 or the second heat storage tank 15, thereby improving the overall thermal energy utilization efficiency of the system. The carbon dioxide utilization device 39 includes carbon capture and storage equipment, carbon dioxide chemical utilization equipment, etc. Since the recovered carbon dioxide has a high purity, it can be directly recycled and utilized by setting up the carbon dioxide utilization device 39.

[0473] In practice, the carbon dioxide generated in the reaction device 21 is discharged through the first outlet pipe 38 and enters the heat storage device 10, so that the high-temperature carbon dioxide exchanges heat with the heat storage particles. After the heat exchange, the heat storage particles are heated and the carbon dioxide is cooled. The cooled carbon dioxide is then transported to the carbon dioxide utilization device 39 for recycling.

[0474] In this invention, carbon dioxide generated at 500-600°C by the reaction device 21 enters the heat storage device 10 through the first outlet pipe 38, where it exchanges heat with the heat storage particles and stores the residual heat. After absorbing heat and heating up, the heat storage particles continue to be heated to form a high-temperature heat source, which can be used to heat the first carrier gas for subsequent decomposition reactions. This achieves the recovery and utilization of carbon dioxide waste heat, reducing dependence on energy and maintaining system thermal balance through thermal circulation. Finally, the cooled carbon dioxide enters the carbon dioxide utilization device 39 for resource treatment, avoiding direct emission.

[0475] In some embodiments, see Figure 5 A dust removal device 27 is provided on the first air outlet pipe 38;

[0476] The inlet of the dust removal device 27 is connected to the end of the first exhaust pipe 38 near the reaction device 21, and the outlet is connected to the end of the first exhaust pipe 38 near the heat storage device 10.

[0477] The dust removal device 27 is configured to separate impurities in the carbon dioxide before cooling and transport the separated carbon dioxide to the heat storage device 10.

[0478] In this invention, the dust removal device 27 includes a cyclone separator, a filter, or an adsorption tower to achieve gas-solid separation. In this invention, the inlet and outlet of the dust removal device 27 are configured to accurately transport the carbon dioxide discharged from the reaction device 21 to the dust removal device 27 for separation. Because there are many thermal decomposition products, carbon dioxide is prone to carrying impurities such as dust, sulfides, and water vapor when it is discharged. In order to improve the purity of carbon dioxide, the carbon dioxide with impurities is sent to the dust removal device 27 for separation.

[0479] In practice, the carbon dioxide generated in the reaction device 21 is discharged through the first outlet pipe 38 and enters the dust removal device 27. After separation, the carbon dioxide is transported to the heat storage device 10 through the dust removal device 27, so that the high-temperature carbon dioxide exchanges heat with the heat storage particles. After heat exchange, the heat storage particles are heated and the carbon dioxide is cooled. The cooled carbon dioxide is then transported to the carbon dioxide utilization device 39 for recycling.

[0480] In this invention, the dust removal device 27 effectively removes these impurities, ensuring higher purity carbon dioxide entering the heat storage device 10. High-purity carbon dioxide avoids contamination or corrosion of the heat storage particles by impurities, extending the service life of the heat storage particles. Furthermore, when the separated pure carbon dioxide exchanges heat with the heat storage particles, the heat exchange efficiency is higher and the heat loss is less.

[0481] In some embodiments, see Figure 5 The reaction device 21 is provided with a second gas outlet pipe 40;

[0482] The second vent pipe 40 is connected to the interior of the heat storage device 10;

[0483] The reaction device 21 is further configured to discharge the cooled third carrier gas to the heat storage device 10 through the second outlet pipe 40, so that the cooled third carrier gas exchanges heat with the heat storage particles and recovers the remaining heat of the cooled third carrier gas.

[0484] In this invention, one end of the second vent pipe 40 is connected to the outlet provided on the reaction device 21;

[0485] When the system includes a first heat storage tank 11 and a second heat storage tank 15, the end of the second gas outlet pipe 40 away from the reaction device 21 is connected to the inside of the first heat storage tank 11 and the second heat storage tank 15 respectively, so as to transport the cooled third carrier gas to the first heat storage tank 11 and the second heat storage tank 15 respectively to recover heat energy.

[0486] Since the temperature of the third carrier gas after cooling is 300-500℃, it still carries some heat. In order to avoid heat loss, this part of the heat is recovered by setting a second exhaust pipe 40.

[0487] Valves 8 are respectively installed on the connecting pipes of the second vent pipe 40 to the first heat storage tank 11 and the second heat storage tank 15;

[0488] In one scenario, when high-temperature carbon dioxide is introduced into the first thermal storage tank 11 or the second thermal storage tank 15, one of the valves 8 is closed and the other valve 8 is opened, so that the cooled third carrier gas is transported through the second outlet pipe 40 to the first thermal storage tank 11 or the second thermal storage tank 15 that has not been introduced with high-temperature carbon dioxide, thus avoiding gas mixing and increasing the difficulty of subsequent processing.

[0489] In one scenario, when no high-temperature carbon dioxide is introduced into either the first heat storage tank 11 or the second heat storage tank 15, all valves 8 are opened to allow the cooled third carrier gas to be transported to the first heat storage tank 11 and the second heat storage tank 15 through the second exhaust pipe 40, thereby achieving efficient heat transfer. Both the first heat storage tank 11 and the second heat storage tank 15 are equipped with exhaust ports 17, which are used to discharge the carrier gas obtained after heat exchange from the first heat storage tank 11 and the second heat storage tank 15. A pipe is connected to the exhaust port 17, and a valve 8 is installed on the pipe. During the initial heat storage or heat release phase of the system, the valve 8 on the exhaust port 17 needs to be closed to prevent the carrier gas from escaping along the exhaust port 17.

[0490] In practice, the third carrier gas in the reaction device 21 is cooled down and discharged along the second outlet pipe 40, and then enters the heat storage device 10 to exchange heat with the heat storage particles therein, so that the heat storage particles are heated up. After the third carrier gas is cooled down, it is discharged to realize heat recovery.

[0491] In this invention, the cooled third carrier gas is transported to the heat storage device 10 through the second outlet pipe 40, where it exchanges heat with the heat storage particles to recover its residual heat. The recovered heat is stored in the heat storage particles, forming a medium-temperature heat source that can be used to preheat the first carrier gas. By recovering the residual heat of the third carrier gas, the system's thermal balance is ensured, and heat waste is avoided.

[0492] In some embodiments, see Figure 5 The reaction apparatus 21 includes a decomposition furnace 41 and a gas channel 42;

[0493] The gas channel 42 is disposed on opposite sides inside the decomposition furnace 41, the second gas outlet pipe 40 is connected to the gas channel 42, and the decomposition furnace 41 is connected to the interior of the heat storage device 10.

[0494] The gas passage 42 is configured to allow the third carrier gas to flow in and to deliver the cooled third carrier gas to the second outlet pipe 40.

[0495] In this invention, gas channels 42 are disposed on opposite sides of the decomposition furnace 41 in the axial direction, and the gas channels 42 on both sides are connected by a pipe so as to simultaneously deliver the third carrier gas into the gas pipes on both sides.

[0496] In practice, the third carrier gas is discharged through the heat release port 12 and then enters the gas channel 42. The third carrier gas releases heat in the gas channel 42, which raises the temperature of the decomposition furnace 41. The carbonates in the decomposition furnace 41 undergo thermal decomposition reaction. The cooled third carrier gas enters the second gas outlet pipe 40 and is discharged through the second gas outlet pipe 40 to the heat storage device 10 for heat recovery.

[0497] In this invention, by setting up a decomposition furnace 41 and a gas channel 42, the cooled third carrier gas and carbon dioxide are respectively transported to the heat storage device 10, avoiding the mixing of carbon dioxide with the first carrier gas, which helps to obtain high-purity carbon dioxide.

[0498] This invention also provides a method for controlling the thermal decomposition of carbonates, applicable to... Figure 5 The thermal energy storage integrated system based on high-temperature thermochemical conversion is shown in the figure. Figure 6 The control methods include:

[0499] Step S1: Before the first carrier gas is delivered to the heat storage device 10, the control device 53 controls the opening of valve 8 on the first gas delivery pipe 2 and the gas delivery pipeline 9, and closes valve 8 on the second gas delivery pipe 3, and obtains the temperature of the heat storage device 10 in real time during delivery.

[0500] Step S2: When the temperature of the heat storage device 10 reaches the first preset temperature, the control device 53 controls the closure of the valve 8 on the first gas supply pipe 2 and the gas delivery pipe 9, and opens the valve 8 on the second gas supply pipe 3 to deliver the first carrier gas to the heat storage device 10 and heat it to the second preset temperature. The third carrier gas is delivered to the reaction device 21 to provide heat, so that the carbonate absorbs heat and undergoes thermal decomposition reaction to obtain decomposition products and carbon dioxide.

[0501] The first preset temperature is 1000-1700℃;

[0502] The second preset temperature is 300-1500℃.

[0503] This invention allows for phased regulation of heat storage and release by setting a first preset temperature and a second preset temperature. When the temperature of the heat storage device 10 is below the first preset temperature, the first carrier gas is heated to a high temperature by the heating device 20, rapidly storing heat in the heat storage particles and avoiding inefficient heat storage. Once the temperature of the heat storage particles reaches the target, the switching valve 8 directly delivers the first carrier gas to the heat storage device 10, using the high-temperature heat storage particles to heat them to the temperature required for carbonate decomposition, reducing reliance on real-time heating equipment. Compared to traditional continuous heating modes, energy consumption is significantly reduced, and frequent high-temperature shocks are minimized, extending the service life of the heat storage particles.

[0504] The control device 53 monitors the temperature of the heat storage device 10 in real time via the temperature sensor 54 and dynamically adjusts the opening and closing status of the valves. When the thermal decomposition reaction requires rapid energy supply, the system can simultaneously activate the heating device 20 and the heat storage device 10, outputting superimposed high-temperature gas (1200℃+1800℃) in a short period of time to accelerate the reaction process. When the thermal decomposition demand is low, the valve 8 on the second gas supply pipe 3 is closed, and heat is stored only through the heating device 20 to pre-store energy for the peak demand of the next day. The system response time is shortened to the second level, which is especially suitable for intermittent feeding scenarios in carbonate decomposition.

[0505] To enable those skilled in the art to more clearly understand the present invention, the following embodiments will be used to provide a detailed description of an integrated thermal storage system based on high-temperature thermochemical conversion.

[0506] Example 1

[0507] See Figure 1 The diagram shows a schematic of a thermal energy storage integrated system based on high-temperature thermochemical conversion for solid waste decomposition.

[0508] (1) Start the fan 5, open the valve 8 on the first gas supply pipe 2 and the second gas supply pipe 3, and deliver nitrogen gas (i.e. the first carrier gas) with a temperature below 50°C to the heating device 20. After heating, the second carrier gas with a temperature between 800-1500°C is obtained. The second carrier gas is delivered to the first heat storage tank 11 so that the second carrier gas can contact the carbon particles for heat exchange. When the temperature in the heat storage device 10 is below 1400°C, keep the valve 8 on the first gas supply pipe 2 and the second gas supply pipe 3 open to store heat until the first high temperature heat storage particles with a temperature of 1500°C are obtained. The cooled second carrier gas is discharged through the gas supply pipe 9.

[0509] (2) Close the valve 8 on the first gas pipeline 2 and the gas delivery pipeline 9, open the valve 8 on the second gas pipeline 3, and the fan 5 sends the first carrier gas into the first heat storage tank 11 so that the first carrier gas comes into contact with the first high temperature heat storage particles for heat exchange, and obtains the third carrier gas with a temperature between 800-1500℃, and the first high temperature heat storage particles are cooled to below 500℃.

[0510] (3) The third carrier gas is discharged from the first heat storage tank 11 through the heat release port and then enters the thermal conversion furnace 22 to heat the solid waste in the thermal conversion furnace 22 and carry out thermal decomposition reaction to obtain decomposition products;

[0511] (4) The decomposition products are transported to the cooler 23. At the same time, the gas conveyor 25 is started to transport the first carrier gas with a temperature below 50°C to the cooler 23, so that the first carrier gas comes into contact with the decomposition products for heat exchange. After the decomposition products are cooled to below 50°C, they are discharged from the cooler 23. After the first carrier gas is heated to any temperature value between 250°C and 900°C, the fifth carrier gas is obtained.

[0512] (5) After the fifth carrier gas is discharged through the outlet 26 on the cooler 23, it enters the dust removal device 27 for dust removal. After dust removal, the fifth carrier gas is transported to the second heat storage tank 15 through the pipeline and exchanges heat with the carbon particles in the second heat storage tank 15 to recover the heat of the fifth carrier gas. After the fifth carrier gas is cooled down, it is discharged from the second heat storage tank 15 through the exhaust port 17 and then transported to the tail gas recovery device 48 for recovery.

[0513] (6) Solid waste is piled up in preheating device 43. The third carrier gas in thermal conversion furnace 22 is cooled to 500-900°C to obtain the fourth carrier gas. The fourth carrier gas is transported to preheating device 43 through gas outlet 46. The fourth carrier gas exchanges heat with the solid waste in preheating device 43 to raise the solid waste to any temperature value between 200-500°C. The fourth carrier gas is cooled to 300-500°C to obtain the sixth carrier gas. The heated solid waste is transported to conveying pipe 45 through discharge outlet 44 and then enters thermal conversion furnace 22 through conveying pipe 45 to participate in subsequent decomposition reaction.

[0514] (7) The sixth carrier gas is transported to the dust collector 47 and after dust removal, it is transported to the second heat storage tank 15 so that the sixth carrier gas after dust removal can exchange heat with the carbon particles in the second heat storage tank 15 to recover the remaining heat carried by the sixth carrier gas. After the sixth carrier gas is cooled down, it is discharged through the exhaust port 17 to the tail gas recovery device 48 for recovery.

[0515] Example 2

[0516] See Figure 1 The diagram shows a schematic of a thermal energy storage integrated system based on high-temperature thermochemical conversion for solid waste decomposition. Example 2 differs from Example 1 in that it further includes the following steps:

[0517] (8) The heating device 20 delivers the second carrier gas to the second heat storage tank 15 and continues to heat the carbon particles in the second heat storage tank 15 to raise the temperature to 1500°C to obtain the first high temperature heat storage particles.

[0518] (9) The blower 5 simultaneously delivers the first carrier gas to the second heat storage tank 15, heats it to obtain the third carrier gas, and delivers the third carrier gas to the thermal conversion furnace 22 through the heat release port 12 on the second heat storage tank 15, and heats the solid waste together with the third carrier gas delivered by the first heat storage tank 11 to improve the decomposition efficiency.

[0519] Example 3

[0520] See Figure 1 The diagram shows a schematic of a thermal energy storage integrated system based on high-temperature thermochemical conversion for solid waste decomposition. Example 3 differs from Example 2 in that it further includes the following steps:

[0521] (10) After the first heat storage tank 11 and the second heat storage tank 15 have finished releasing heat, close the valve on the second gas supply pipe 3 and the fan 5, and simultaneously transport the carrier gas delivered by the dust removal device 27 and the dust collector 47 to the first heat storage tank 11 and the second heat storage tank 15 to recover the remaining heat of the carrier gas. The heat-recovered carrier gas is output to the tail gas recovery device 48 through the exhaust port on the first heat storage tank 11 and the second heat storage tank 15 for recovery.

[0522] Example 3

[0523] See Figure 2 The diagram shown is a schematic of a thermal energy storage integrated system based on high-temperature thermochemical conversion used in a high-temperature industrial process (I). The high-temperature industrial process performed by this system is the blast furnace ironmaking process, which specifically includes:

[0524] (1) Start the fan 5, open the valve 8 on the first gas supply pipe 2, and close the valve 8 on the second gas supply pipe 3. The fan 5 transports the first carrier gas along the first gas supply pipe 2 to the heating device 20. The heating device 20 is set to be powered by solar energy. The first carrier gas is heated to any temperature between 1500-1600℃ by the heating device 20 to obtain the second carrier gas.

[0525] (2) The second carrier gas is delivered to at least one first heat storage tank 11, so that the second carrier gas comes into contact with the heat storage particles in the first heat storage tank 11 for heat exchange, and the heat storage particles in the first heat storage tank 11 are heated to above 1600°C to obtain a high-temperature heat source. The second carrier gas after releasing heat is discharged from the first heat storage tank 11.

[0526] (3) After the first heat storage tank 11 has completed heat storage, close the valve 8 on the first gas supply pipe 2 and open the valve 8 on the second gas supply pipe 3 so that the first carrier gas blown by the fan 5 enters the first heat storage tank 11 along the second gas supply pipe 3, so that the first carrier gas comes into contact with the heat storage particles for heat exchange. When the first carrier gas is heated to any temperature value between 1500-1600℃, the third carrier gas is obtained.

[0527] (4) The third carrier gas is transported along the first heat storage tank 11 to the third gas transmission pipe 4, and then reaches the gas inlet 24 through the third gas transmission pipe 4, and then enters the furnace body 34. Iron ore, coke and limestone are transported to the furnace body 34 in advance along the feed inlet 35. The third carrier gas is transported from bottom to top in the furnace body 34 to provide a high temperature environment for the reaction. The carbon monoxide obtained after the coke is burned is transported upward, so that the iron ore and carbon monoxide undergo a reduction reaction to obtain molten iron. The molten iron is discharged from the furnace body 34 along the discharge port 44. The third carrier gas is cooled down to obtain the fourth carrier gas.

[0528] (5) After the fourth carrier gas is discharged from the furnace body 34, it enters the tail gas recovery pipe 31 and is then transported to the dust removal device 27. After dust removal, it is drawn into the tail gas recovery pipe 31 by the negative pressure fan 33. The throttle valve 32 between the unheated first heat storage tank 11 and the tail gas recovery pipe 31 is opened, so that the dust-removed fourth carrier gas is transported to the unheated first heat storage tank 11 through the tail gas recovery pipe 31. The fourth carrier gas exchanges heat with the heat storage particles in the unheated first heat storage tank 11 to recover the remaining heat of the fourth carrier gas. The fourth carrier gas after heat release flows out of the first heat storage tank 11 and then enters the tail gas recovery device 48 for recovery.

[0529] Example 4

[0530] See Figure 3 The schematic diagram shown is of the integrated thermal storage system based on high-temperature thermochemical conversion used in a high-temperature industrial process (II). The high-temperature industrial process carried out by this system is a non-ferrous metal smelting process. The steps (1)-(3) of Example 4 are the same as those of Example 3. Example 4 also includes the following steps:

[0531] (4) The third carrier gas is transported along the first heat storage tank 11 to the third gas transmission pipe 4, and then transported through the third gas transmission pipe 4 to the spray gun 37. The copper concentrate is transported to the smelting furnace 36 in advance through the inlet 361. The spray gun 37 sprays the third carrier gas into the copper concentrate through the output end to form a stirring fluid. The copper concentrate is smelted by the heat carried by the stirring fluid to obtain a mixture of ice ore and metal-slag. The mixture of ice ore and metal-slag is discharged from the smelting furnace 36 through the outlet 362.

[0532] (5) After the fourth carrier gas is discharged from the smelting furnace 36, it enters the tail gas recovery pipe 31 and is then transported to the dust removal device 27. After dust removal, it is drawn into the tail gas recovery pipe 31 by the negative pressure fan 33. The throttle valve 32 between the unheated first heat storage tank 11 and the tail gas recovery pipe 31 is opened, so that the dust-removed fourth carrier gas is transported to the unheated first heat storage tank 11 through the tail gas recovery pipe 31. The fourth carrier gas exchanges heat with the heat storage particles in the unheated first heat storage tank 11 to recover the remaining heat of the fourth carrier gas. The fourth carrier gas, after releasing heat, flows out of the first heat storage tank 11 and then enters the tail gas recovery device 48 for recovery.

[0533] Example 5

[0534] See Figure 4 The diagram shows a schematic of a thermal storage integrated system based on high-temperature thermochemical conversion used for cement clinker firing.

[0535] (1) Open the valve 8 on the first gas pipeline 2 and the gas delivery pipeline 9, start the fan 5, and the fan 5 delivers the ambient temperature air (i.e. the first carrier gas) along the first gas pipeline 2 to the heating device 20. The heating device 20 is connected to green energy such as photovoltaic, wind power, and off-peak electricity, and converts electrical energy into heat energy to heat the air, thereby obtaining the second carrier gas at a temperature of 1500℃, and then delivers the second carrier gas to the first heat storage tank 11.

[0536] (2) After the second carrier gas enters the first heat storage tank 11, it contacts and exchanges heat with the silicon carbide particles in the first heat storage tank 11, raising the temperature of the silicon carbide particles to above 1500°C, and obtaining the first high-temperature heat storage particles. After the second carrier gas cools down, it is discharged from the first heat storage tank 11 along the gas conveying pipeline 9. During this process, the valve 8 on the connecting pipeline between the heat storage device 10 and the reaction device 21 is set to the closed state.

[0537] (3) Until the internal temperature of the first heat storage tank 11 reaches above 1500℃, close the valve 8 on the first gas supply pipe 2 and the gas supply pipeline 9, open the valve 8 on the second gas supply pipe 3 and the valve 8 on the connecting pipeline between the heat storage device 10 and the reaction device 21, and the fan 5 delivers room temperature air to the first heat storage tank 11 along the second gas supply pipe 3, so that the air exchanges heat with the first high temperature heat storage particles. After the air is heated, a third carrier gas with a temperature of 1450℃ is obtained. The third carrier gas is delivered to the reaction device 21. After receiving the third carrier gas, the reaction device 21 uses the heat carried by the third carrier gas to burn cement raw materials and obtain cement clinker. After the third carrier gas releases heat, a fourth carrier gas with a temperature between 850-950℃ is formed.

[0538] (4) The fourth carrier gas is transported to the preheating device 43, and the remaining heat of the fourth carrier gas is used to heat the cement raw material in the preheating device 43, so that the cement raw material is heated to 500-600℃. After the fourth carrier gas is cooled down, a fifth carrier gas with a temperature between 300-500℃ is obtained. The heated cement raw material is transported to the reaction device 21 and fired to obtain cement clinker.

[0539] (5) The fifth carrier gas is transported to the dust removal device 27 along the input end 28. After gas-solid separation, the remaining dust is transported to the preheating device 43 through the second output end 30. After mixing with the cement raw material inside, it is transported to the reaction device 21 for firing to obtain cement clinker. The fifth carrier gas after dust removal enters the recovery pipe 52 along the first output end 29.

[0540] (6) At this time, if the temperature inside the first heat storage tank 11 is lower than 500°C, the shut-off valve 311 is opened, the tail gas recovery pipe 31 is connected, and the valve 8 on the connecting pipe between the second gas supply pipe 3 and the heat storage device 1 and the reaction device 21 is closed, so that part of the fifth carrier gas after dust removal enters the waste heat storage tank 51 along the recovery pipe 52 and the other part enters the tail gas recovery pipe 31 along the recovery pipe 52 and then enters the first heat storage tank 11, so that the fifth carrier gas contacts and exchanges heat with the silicon carbide particles in the waste heat storage tank 51 and the first heat storage tank 11 respectively, and the temperature of the fifth carrier gas is reduced to 300-400°C, and then discharged into the tail gas recovery device 48 along the tail gas outlet 50 on the waste heat storage tank 51. At the same time, the valve 8 on the gas supply pipe 9 can be opened, so that the cooled fifth carrier gas is discharged from the first heat storage tank 11 along the gas supply pipe 9. In another case, the first heat storage tank can be equipped with the same exhaust gas outlet 50 as the waste heat storage tank, and the exhaust gas outlet 50 is connected to the exhaust gas recovery device 48, so that the fifth carrier gas after cooling in the first heat storage tank is transported to the exhaust gas recovery device for storage.

[0541] Example 6

[0542] See Figure 5 The diagram shows a schematic of a thermal storage integrated system based on high-temperature thermochemical conversion for carbonate decomposition.

[0543] (1) Start the fan 5, and control device 53 controls the opening of valve 8 on the first gas pipeline 2 and gas delivery pipeline 9, and closes valve 8 on the second gas pipeline 3. The fan 5 delivers the first carrier gas along the first gas pipeline 2 to the heating device 20. The heating device 20 is set to be powered by solar energy. After the first carrier gas is heated to any temperature between 800-1700℃ by the heating device 20, the second carrier gas is obtained.

[0544] (2) The second carrier gas is respectively delivered to the first heat storage tank 11 and the second heat storage tank 15, so that the second carrier gas exchanges heat with the white corundum particles in the first heat storage tank 11 and the second heat storage tank 15 respectively, so that the white corundum particles are heated to any temperature between 800-1700℃, and a high temperature heat source is obtained. The second carrier gas after releasing heat is discharged from the first heat storage tank 11 and the second heat storage tank 15.

[0545] (3) Temperature sensor 54 sends a temperature signal to control device 53. When the temperature value received by control device 53 is lower than 800℃, the operation of steps (1)-(2) continues.

[0546] (4) When the temperature received by the control device 53 is not lower than 800℃ and is any temperature value between 1000-1700℃, the valve 8 on the first gas delivery pipe 2 and the gas delivery pipeline 9 is closed, and the valve 8 on the second gas delivery pipe 3 is opened, so that the first carrier gas blown by the fan 5 enters the first heat storage tank 11 and the second heat storage tank 15 along the second gas delivery pipe 3, so that the first carrier gas comes into contact with the white corundum particles for heat exchange. When the first carrier gas is heated to any temperature value between 300-1500℃, the third carrier gas is obtained.

[0547] (4) The third carrier gas is transported to the gas channel 42 through the heat release port 12 on the first heat storage tank 11 and the second heat storage tank 15. After the gas channel 42 releases heat, the decomposition furnace 41 is heated. The carbonate in the decomposition furnace 41 absorbs the heat carried by the third carrier gas to carry out thermal decomposition reaction, and obtains decomposition products and carbon dioxide at a temperature of 500-600℃.

[0548] (5) Carbon dioxide is transported to the dust removal device 27 along the first outlet pipe 38. After separation and impurity removal, the carbon dioxide is output from the dust removal device 27 and enters the first heat storage tank 11 through the first outlet pipe 38 to exchange heat with the white corundum particles and cool down. The cooled carbon dioxide is then transported to the carbon dioxide utilization device 39 for recycling.

[0549] (6) The third carrier gas after cooling in the gas channel 42 is transported to the second heat storage tank 15 through the second gas outlet pipe 40. After contacting and exchanging heat with the white corundum particles, it is cooled to room temperature. Finally, the cooled carrier gas is discharged from the second heat storage tank 15.

[0550] In summary, this invention provides a thermal energy storage integrated system based on high-temperature thermochemical conversion. Through a carrier gas circulation and thermal energy storage particle synergy system, combined with a high-temperature thermal energy storage device, it achieves cascaded energy utilization in the thermochemical conversion process of bulk solid waste. The system utilizes thermal energy storage particles to store waste heat or renewable energy, releasing high-temperature heat during the reaction, significantly reducing fossil fuel dependence and CO2 emissions. The multi-stage heat exchange design improves energy utilization efficiency, enabling energy self-sufficiency in waste treatment. This technology can be extended to high-temperature industrial processes such as cement production and carbonate decomposition, providing a stable heat source through the thermal energy storage device, reducing fuel consumption and improving temperature control accuracy, while simultaneously recovering waste heat to reduce thermal pollution, providing an efficient solution for the low-carbon transformation of energy-intensive industries.

[0551] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0552] Although preferred embodiments of the present application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present application.

[0553] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0554] The above provides a detailed description of a thermal storage integrated system based on high-temperature thermochemical conversion provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A thermal energy storage integrated system based on high-temperature thermochemical conversion, characterized in that, The system includes: Gas transmission device (1), heat storage device (10), heating device (20) and reaction device (21); The gas supply device (1) includes a first gas supply pipe (2) and a second gas supply pipe (3). The first gas supply pipe (2) is connected to the heating device (20), and the second gas supply pipe (3) is connected to the heat storage device (10). The gas delivery device (1) is configured to deliver a first carrier gas to the heating device (20) through the first gas delivery pipe (2), and / or the gas delivery device (1) is configured to deliver the first carrier gas to the heat storage device (10) through the second gas delivery pipe (3). The heating device (20) is connected to the heat storage device (10). The heating device (20) is configured to heat the first carrier gas to obtain the second carrier gas and deliver the second carrier gas to the heat storage device (10). The heat storage device (10) stores heat storage particles. The heat storage device (10) uses the second carrier gas to heat the heat storage particles to form a first high-temperature heat storage particle. The first high-temperature heat storage particle heats the first carrier gas that enters it to obtain a third carrier gas. The reaction device (21) is internally connected to the heat storage device (10). The reaction device (21) is configured to receive the third carrier gas and decompose solid waste by means of the heat carried by the third carrier gas to obtain decomposition products. The third carrier gas releases heat to form a fourth carrier gas.

2. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 1, characterized in that, The heat storage device (10) includes a first heat storage tank (11) and a second heat storage tank (15), and the heat storage particles are stored in both the first heat storage tank (11) and the second heat storage tank (15). The first heat storage tank (11) and the second heat storage tank (15) are respectively provided with heat release ports (12), and the heat release ports (12) are respectively connected to the inside of the reaction device (21); The gas delivery device (1) is internally connected to the first heat storage tank (11) and / or the second heat storage tank (15), and the heating device (20) is internally connected to the first heat storage tank (11) and / or the second heat storage tank (15). The gas delivery device (1) is configured to deliver the first carrier gas to the first heat storage tank (11) and / or the second heat storage tank (15); The heating device (20) is configured to deliver the second carrier gas to the first heat storage tank (11) and / or the second heat storage tank (15); The first heat storage tank (11) and the second heat storage tank (15) are configured to deliver the third carrier gas to the reaction device (21) through the heat release port (12).

3. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 2, characterized in that, The outer walls of the first heat storage tank (11) and the second heat storage tank (15) are provided with heat insulation layers (16).

4. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 2, characterized in that, The system also includes an exhaust gas recovery device (48); The first heat storage tank (11) and the second heat storage tank (15) are provided with exhaust ports (17), and the exhaust ports (17) are connected to the exhaust gas recovery device (48); The exhaust gas recovery device (48) is configured to recover the carrier gas discharged from the first heat storage tank (11) and the second heat storage tank (15).

5. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 2, characterized in that, The reaction device (21) includes a thermal conversion furnace (22), the inlet of which is connected to the heat storage device (10), and a cooler (23) is installed on the connecting pipe at the outlet of the thermal conversion furnace (22). The thermal conversion furnace (22) is configured to receive the third carrier gas delivered by the heat storage device (10), decompose the solid waste by means of the heat carried by the third carrier gas, and deliver the obtained decomposition products to the cooler (23). The cooler (23) is configured to cool the decomposition products before discharging them.

6. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 5, characterized in that, The cooler (23) is provided with an air inlet (24), and an air conveyor (25) is provided on the connecting pipe of the air inlet (24); The gas delivery unit (25) is configured to deliver a first carrier gas with a temperature below 50°C into the cooler (23); The cooler (23) is also configured to exchange heat between the first carrier gas with a temperature below 50°C and the decomposition products, recover the heat carried by the decomposition products, and heat the first carrier gas with a temperature below 50°C to obtain a fifth carrier gas.

7. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 6, characterized in that, The cooler (23) is provided with an air outlet (26), and a dust removal device (27) is provided on the connecting pipe of the air outlet (26). The end of the dust removal device (27) away from the cooler (23) is connected to the inside of the first heat storage tank (11) and / or the second heat storage tank (15). The dust removal device (27) is configured to perform dust removal treatment on the fifth carrier gas and to transport the dust-removed fifth carrier gas to the first heat storage tank (11) and / or the second heat storage tank (15); The first heat storage tank (11) and the second heat storage tank (15) are also configured to recover the heat carried by the fifth carrier gas after dust removal using the heat storage particles.

8. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 1, characterized in that, The system also includes a preheating device (43); The preheating device (43) includes a discharge port (44) and an air supply port (46); The discharge port (44) is connected to the reaction device (21) via a conveying pipe (45), and the gas inlet (46) is connected to the interior of the reaction device (21); The reaction device (21) is also configured to deliver the fourth carrier gas to the preheating device (43); The preheating device (43) is configured to preheat the solid waste entering it using the fourth carrier gas, and to transport the preheated solid waste to the reaction device (21) along the conveying pipe (45), wherein the fourth carrier gas releases heat to form a sixth carrier gas.

9. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 8, characterized in that, The heat storage device (10) includes a first heat storage tank (11) and a second heat storage tank (15); A dust collector (47) is installed on the connecting pipe of the air outlet of the preheating device (43). The end of the dust collector (47) away from the preheating device (43) is connected to the interior of the first heat storage tank (11) and / or the second heat storage tank (15). The dust collector (47) is configured to receive the sixth carrier gas and perform dust removal treatment, and to deliver the dust-removed sixth carrier gas to the first heat storage tank (11) and / or the second heat storage tank (15); The first heat storage tank (11) and the second heat storage tank (15) are also configured to exchange heat between the heat storage particles and the sixth carrier gas after dust removal, and to recover the remaining heat of the sixth carrier gas after dust removal.

10. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 1, characterized in that, The gas transmission device (1) includes a fan (5) and multiple valves (8); The first gas pipe (2) and the second gas pipe (3) are respectively connected to the fan (5), and the heat storage device (10) is provided with a gas transmission pipe (9). The valves (8) are respectively provided on the first gas pipe (2), the second gas pipe (3) and the gas transmission pipe (9). The valve (8) is configured such that when the first gas supply pipe (2) supplies the first carrier gas, the valve (8) on the first gas supply pipe (2) is in an open state, the valve (8) on the second gas supply pipe (3) is in a closed state, and the opening and closing state of the valve (8) on the gas supply pipeline (9) is the same as the opening and closing state of the valve (8) on the first gas supply pipe (2). When the first carrier gas is delivered through the second gas delivery pipe (3), the valve (8) on the first gas delivery pipe (2) is closed, and the valve (8) on the second gas delivery pipe (3) is open.

11. A thermal energy storage integrated system based on high-temperature thermochemical conversion, characterized in that, The system includes: Gas transmission device (1), heat storage device (10), heating device (20) and reaction device (21); The gas supply device (1) is connected to the heating device (20) via a first gas supply pipe (2), the gas supply device (1) is connected to the heat storage device (10) via a second gas supply pipe (3), the heat storage device (10) is internally connected to the heating device (20), the heat storage device (10) is connected to the reaction device (21) via a third gas supply pipe (4), and the heat storage device (10) stores heat storage particles. The gas delivery device (1) is configured to deliver a first carrier gas to the heating device (20) through the first gas delivery pipe (2), and / or deliver the first carrier gas to the heat storage device (10) through the second gas delivery pipe (3); The heating device (20) is configured to heat the first carrier gas delivered by the first gas pipe (2) to 1500-1600°C to obtain a second carrier gas, and to deliver the second carrier gas to the heat storage device (10). The heat storage device (10) is configured to heat the heat storage particles using the heat carried by the second carrier gas, and to heat the first carrier gas delivered by the second gas pipe (3) using the heated heat storage particles to obtain a third carrier gas. The reaction device (21) is configured to receive the third carrier gas through the third gas pipe (4), utilize the heat carried by the third carrier gas to carry out a high-temperature industrial process, and cool the third carrier gas to form a fourth carrier gas. The high-temperature industrial process includes blast furnace ironmaking or non-ferrous metal smelting.

12. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 11, characterized in that, The gas transmission device (1) includes a fan (5) and multiple valves (8); The fan (5) includes a first air supply end (6) and a second air supply end (7). The end of the first air supply pipe (2) away from the heating device (20) is connected to the first air supply end (6), and the end of the second air supply pipe (3) away from the heat storage device (10) is connected to the second air supply end (7). The valves (8) are respectively installed on the first air supply pipe (2) and the second air supply pipe (3). The valve (8) is configured such that when the first gas supply pipe (2) supplies the first carrier gas, the valve (8) on the first gas supply pipe (2) is in an open state, and the valve (8) on the second gas supply pipe (3) is in a closed state. When the first carrier gas is delivered through the second gas delivery pipe (3), the valve (8) on the first gas delivery pipe (2) is closed, and the valve (8) on the second gas delivery pipe (3) is open.

13. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 11, characterized in that, The heat storage device (10) includes at least one first heat storage tank (11); Each of the first thermal storage tanks (11) includes a first inlet (13) and a first outlet (14); The end of the second gas pipe (3) away from the gas delivery device (1) is connected to the first inlet (13), and the end of the third gas pipe (4) away from the reaction device (21) is connected to the first outlet (14). The heating device (20) is in internal communication with at least one of the first heat storage tanks (11), and the heating device (20) is configured to deliver the second carrier gas into at least one of the first heat storage tanks (11).

14. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 13, characterized in that, The reaction device (21) is equipped with a tail gas recovery pipe (31); The heat storage device (10) is provided with a tail gas recovery port (18), and the end of the tail gas recovery pipe (31) away from the reaction device (21) is connected to the tail gas recovery port (18). The heat storage device (10) is also configured to receive the fourth carrier gas output from the reaction device (21) delivered by the tail gas recovery pipe (31), use the fourth carrier gas to heat the heat storage particles, and recover the residual heat of the fourth carrier gas.

15. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 14, characterized in that, The heat storage device (10) includes two first heat storage tanks (11), each of which stores the heat storage particles. Each of the first heat storage tanks (11) is provided with a tail gas recovery port (18), and the end of the tail gas recovery pipe (31) away from the reaction device (21) is connected to the tail gas recovery ports (18) on the two first heat storage tanks (11) respectively; a throttling valve (32) is provided on the connecting pipe between the tail gas recovery pipe (31) and the two tail gas recovery ports (18); The exhaust gas recovery pipe (31) is configured to deliver the fourth carrier gas to at least one of the first heat storage tanks (11) so that the fourth carrier gas heats the heat storage particles in at least one of the first heat storage tanks (11). The throttle valve (32) is configured to open when the fourth carrier gas is delivered into the first heat storage tank (11) through the exhaust gas recovery pipe (31).

16. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 14, characterized in that, A dust removal device (27) is installed on the exhaust gas recovery pipe (31); The dust removal device (27) is configured to remove dust from the fourth carrier gas output by the reaction device (21), and the gas after dust removal is transported through the tail gas recovery pipe (31).

17. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 16, characterized in that, A negative pressure fan (33) is installed on the tail gas recovery pipe (31) between the dust removal device (27) and the heat storage device (10); The air inlet of the negative pressure fan (33) is connected to the exhaust gas recovery pipe (31) on the side near the dust removal device (27), and the air outlet is connected to the exhaust gas recovery pipe (31) on the side near the heat storage device (10). The negative pressure fan (33) is configured to blow the dust-removed gas through the exhaust gas recovery pipe (31) into the heat storage device (10).

18. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 11, characterized in that, The system also includes an exhaust gas recovery device (48); The exhaust gas recovery device (48) is internally connected to the heat storage device (10); The exhaust gas recovery device (48) is configured to recover the carrier gas discharged from the heat storage device (10) that has been cooled to below 50°C.

19. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 11, characterized in that, The reaction device (21) is configured to receive the third carrier gas through the third gas pipe (4) and use the heat carried by the third carrier gas to carry out a high-temperature industrial process, wherein the high-temperature industrial process is a blast furnace ironmaking process. The reaction apparatus (21) includes a furnace body (34); The furnace body (34) is provided with an air inlet (24), a feed inlet (35) and a discharge outlet (44); The air inlet (24) is connected to the end of the third air pipe (4) away from the heat storage device (10); The air inlet (24) is configured to allow the third carrier gas to enter the furnace body (34); The feed inlet (35) is configured to feed iron ore, coke and limestone into the furnace body (34); The furnace body (34) is configured to utilize the high-temperature environment provided by the third carrier gas to burn the coke, obtain carbon monoxide, and cause the iron ore to undergo a reduction reaction with the carbon monoxide to obtain molten iron; The discharge port (44) is configured to discharge the molten iron.

20. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 11, characterized in that, The reaction device (21) is configured to receive the third carrier gas through the third gas pipe (4) and use the heat carried by the third carrier gas to carry out a high-temperature industrial process, wherein the high-temperature industrial process is a non-ferrous metal smelting process. The reaction device (21) includes a smelting furnace (36) and a spray gun (37); The input end of the spray gun (37) is connected to the end of the third gas pipe (4) away from the heat storage device (10), and the output end is connected to the inside of the smelting furnace (36); The inlet (361) of the smelting furnace (36) is configured to deliver copper concentrate into the smelting furnace (36); The spray gun (37) is configured to inject the third carrier gas into the copper concentrate to form a stirred fluid; The smelting furnace (36) is configured to smelt the copper concentrate using the heat carried by the stirring fluid formed by the third carrier gas to obtain matte, and a mixture of metal and slag. The outlet (362) of the smelting furnace (36) is configured to discharge matte, as well as a mixture of metal and slag.

21. A thermal energy storage integrated system based on high-temperature thermochemical conversion, characterized in that, The system includes: Gas transmission device (1), heat storage device (10), heating device (20), reaction device (21) and waste heat recovery device (49); The gas supply device (1) includes a first gas supply pipe (2) and a second gas supply pipe (3). The first gas supply pipe (2) is connected to the heating device (20), and the second gas supply pipe (3) is connected to the heat storage device (10). The gas delivery device (1) is used to deliver the first carrier gas to the heating device (20) through the first gas delivery pipe (2), or the gas delivery device (1) is used to deliver the first carrier gas to the heat storage device (10) through the second gas delivery pipe (3). The heating device (20) is connected to the heat storage device (10), and the heating device (20) is used to heat the first carrier gas to obtain the second carrier gas; The heat storage device (10) stores heat storage particles, and the heat storage device (10) uses the second carrier gas to heat the heat storage particles to form a first high-temperature heat storage particle; The heat storage device (10) is also used to heat the first carrier gas that enters it using the first high-temperature heat storage particles to obtain a third carrier gas; The reaction device (21) is internally connected to the heat storage device (10). The reaction device (21) is used to receive the third carrier gas and use the heat carried by the third carrier gas to burn cement raw materials to obtain cement clinker. The third carrier gas releases heat to form a fourth carrier gas. The waste heat recovery device (49) is internally connected to the reaction device (21). The waste heat recovery device (49) stores the heat storage particles. The waste heat recovery device (49) is used to receive the fourth carrier gas and recover the heat carried by the fourth carrier gas using the heat storage particles.

22. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 21, characterized in that, The system also includes a preheating device (43); The preheating device (43) is connected to the reaction device (21) and the waste heat recovery device (49) respectively; The preheating device (43) is used to receive the fourth carrier gas, preheat the cement raw material entering it with the fourth carrier gas, and transport the preheated cement raw material to the reaction device (21), and the fourth carrier gas is cooled to form the fifth carrier gas. The waste heat recovery device (49) is used to receive the fifth carrier gas and recover the heat carried by the fifth carrier gas using the heat storage particles.

23. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 22, characterized in that, The system also includes a dust removal device (27); The dust removal device (27) includes an input end (28), a first output end (29) and a second output end (30), wherein the input end (28) is connected to the interior of the preheating device (43) through a pipe, the first output end (29) is connected to the waste heat recovery device (49), and the second output end (30) is connected to the interior of the preheating device (43). The dust removal device (27) is used to remove dust from the received fifth carrier gas, transport the dust-removed fifth carrier gas to the waste heat recovery device (49), and return the dust to the preheating device (43).

24. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 22, characterized in that, The system also includes an exhaust gas recovery device (48); The exhaust gas recovery device (48) and the exhaust gas outlet (50) provided on the waste heat recovery device (49) are connected by a pipeline; The exhaust gas recovery device (48) is used to receive the fifth carrier gas after heat recovery discharged from the exhaust gas outlet (50).

25. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 23, characterized in that, The waste heat recovery device (49) includes a waste heat storage tank (51) and a recovery pipeline (52); One end of the recovery pipe (52) is connected to the first output end (29) of the dust removal device (27), and the other end is connected to the waste heat storage tank (51); The recovery pipeline (52) is used to transport the fifth carrier gas after dust removal to the waste heat storage tank (51); The waste heat storage tank (51) is used to receive the fifth carrier gas after dust removal and to recover the heat carried by the fifth carrier gas after dust removal using the heat storage particles.

26. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 25, characterized in that, The heat storage device (10) includes a first heat storage tank (11) and a tail gas recovery pipe (31); The exhaust gas recovery pipe (31) is connected to the first heat storage tank (11) and the recovery pipe (52) respectively; The first heat storage tank (11) is connected to the heating device (20) and the reaction device (21) respectively. The tail gas recovery pipe (31) is used to receive the fifth carrier gas after dust removal transported by the recovery pipe (52). The first heat storage tank (11) is used to enable the heat storage particles to recover the heat carried by the fifth carrier gas after dust removal.

27. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 26, characterized in that, A shut-off valve (311) is provided on the connecting pipe between the exhaust gas recovery pipe (31) and the recovery pipe (52); The shut-off valve (311) is used to open when the temperature of the first heat storage tank (11) is below 500°C.

28. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 21, characterized in that, The gas transmission device (1) includes a fan (5) and multiple valves (8); The first gas pipe (2) and the second gas pipe (3) are respectively connected to the fan (5), and the heat storage device (10) is provided with a gas transmission pipe (9). The valves (8) are respectively provided on the first gas pipe (2), the second gas pipe (3) and the gas transmission pipe (9). The valve (8) on the first gas pipeline (2) is used to open when the temperature of the heat storage device (10) is below 1400°C. The opening and closing state of the valve (8) on the gas delivery pipeline (9) is consistent with the opening and closing state of the valve (8) on the first gas pipeline (2). The valve (8) on the second gas pipeline (3) is used to open when the temperature of the heat storage device (10) is higher than 1500°C.

29. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 21, characterized in that, A valve (8) is also installed on the connecting pipe between the heat storage device (10) and the reaction device (21); The valve (8) on the connecting pipe between the heat storage device (10) and the reaction device (21) is used to close when the temperature of the heat storage device (10) is below 1400°C and to open when the temperature of the heat storage device (10) is above 1500°C.

30. The integrated thermal storage system based on high-temperature thermochemical conversion according to any one of claims 21-29, characterized in that, The heat storage particles are selected from one of white corundum, quartz sand, alumina, magnesium oxide, zirconium oxide, carbon particles, and silicon carbide.

31. A thermal energy storage integrated system based on high-temperature thermochemical conversion, characterized in that, The system includes: Gas transmission device (1), heat storage device (10), heating device (20) and reaction device (21); The gas delivery device (1) is connected to the interior of the heating device (20) and the heat storage device (10) respectively, and the gas delivery device (1) is configured to deliver a first carrier gas to the heating device (20) and / or the heat storage device (10); The heating device (20) is internally connected to the heat storage device (10). The heating device (20) is configured to heat the first carrier gas entering it, obtain the second carrier gas, and deliver the second carrier gas to the heat storage device (10). The heat storage device (10) stores heat storage particles inside, and the heat release end of the heat storage device (10) is connected to the inside of the reaction device (21). The heat storage device (10) is configured such that after the second carrier gas exchanges heat with the heat storage particles, the heat storage particles are heated to form a high-temperature heat source. The heat storage device (10) is also configured to use the high-temperature heat source to heat the first carrier gas entering it, obtain a third carrier gas, and deliver the third carrier gas to the reaction device (21); The reaction apparatus (21) is configured to absorb the heat carried by the third carrier gas with carbonate to carry out a thermal decomposition reaction, thereby obtaining decomposition products and carbon dioxide.

32. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 31, characterized in that, The heat storage device (10) includes a first heat storage tank (11) and a second heat storage tank (15), and the heat storage particles are stored in both the first heat storage tank (11) and the second heat storage tank (15). The first heat storage tank (11) and the second heat storage tank (15) are respectively provided with heat release ports (12), and the heat release ports (12) are respectively connected to the inside of the reaction device (21); The gas delivery device (1) is connected to the interior of the first heat storage tank (11) and the second heat storage tank (15) respectively; the heating device (20) is connected to the interior of the first heat storage tank (11) and the second heat storage tank (15) respectively; The gas delivery device (1) is configured to deliver the first carrier gas to the first heat storage tank (11) and the second heat storage tank (15) respectively; the heating device (20) is configured to deliver the second carrier gas to the first heat storage tank (11) and the second heat storage tank (15) respectively.

33. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 31, characterized in that, The heat storage particles are selected from one of white corundum, quartz sand, alumina, magnesium oxide, zirconium oxide, carbon particles, and silicon carbide.

34. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 31, characterized in that, The gas transmission device (1) includes a fan (5) and multiple valves (8); The air outlet of the fan (5) is connected to a first air supply pipe (2) and a second air supply pipe (3). The end of the first air supply pipe (2) away from the fan (5) is connected to the heating device (20), and the end of the second air supply pipe (3) away from the fan (5) is connected to the heat storage device (10). The heat storage device (10) is provided with a gas delivery pipe (9). The valves (8) are respectively installed on the first gas pipeline (2), the second gas pipeline (3) and the gas delivery pipeline (9); The valve (8) is configured such that when the first gas supply pipe (2) supplies the first carrier gas, the valve (8) on the first gas supply pipe (2) is in an open state, the valve (8) on the second gas supply pipe (3) is in a closed state, and the opening and closing state of the valve (8) on the gas supply pipeline (9) is the same as the opening and closing state of the valve (8) on the first gas supply pipe (2). When the first carrier gas is delivered through the second gas delivery pipe (3), the valve (8) on the first gas delivery pipe (2) is closed, and the valve (8) on the second gas delivery pipe (3) is open.

35. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 34, characterized in that, The system also includes a control device (53); The control device (53) is configured to open the valve (8) on the first gas pipeline (2) and the valve (8) on the gas delivery pipeline (9) and close the valve (8) on the second gas pipeline (3) when the temperature of the heat storage device (10) is below 800°C. When the temperature of the heat storage device (10) is not lower than 800°C, the valve (8) on the first gas pipeline (2) and the valve (8) on the gas delivery pipeline (9) are closed, and the valve (8) on the second gas pipeline (3) is opened.

36. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 35, characterized in that, The system also includes a temperature sensor (54); The temperature sensor (54) is disposed on the heat storage device (10) and is configured to detect the temperature inside the heat storage device (10) and transmit a temperature signal to the control device (53).

37. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 31, characterized in that, The reaction device (21) is provided with a first gas outlet pipe (38); The first vent pipe (38) is connected to the interior of the heat storage device (10); a carbon dioxide utilization device (39) is connected to the outlet of the heat storage device (10); The reaction device (21) is also configured to discharge the carbon dioxide along the first outlet pipe (38) into the heat storage device (10), so that the carbon dioxide exchanges heat with the heat storage particles and stores the heat carried by the carbon dioxide. The carbon dioxide utilization device (39) is configured to receive the cooled carbon dioxide.

38. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 37, characterized in that, A dust removal device (27) is provided on the first air outlet pipe (38); The inlet of the dust removal device (27) is connected to one end of the first exhaust pipe (38) near the reaction device (21), and the outlet is connected to one end of the first exhaust pipe (38) near the heat storage device (10). The dust removal device (27) is configured to separate impurities in the carbon dioxide before cooling and to transport the separated carbon dioxide to the heat storage device (10).

39. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 31, characterized in that, The reaction device (21) is equipped with a second gas outlet pipe (40); The second vent pipe (40) is connected to the interior of the heat storage device (10); The reaction device (21) is also configured to discharge the cooled third carrier gas to the heat storage device (10) through the second outlet pipe (40), so that the cooled third carrier gas exchanges heat with the heat storage particles and recovers the remaining heat of the cooled third carrier gas.

40. The integrated thermal storage system based on high-temperature thermochemical conversion according to claim 39, characterized in that, The reaction apparatus (21) includes a decomposition furnace (41) and a gas passage (42); The gas channel (42) is located on opposite sides inside the decomposition furnace (41), the second gas outlet pipe (40) is connected to the gas channel (42), and the decomposition furnace (41) is connected to the interior of the heat storage device (10). The gas passage (42) is configured to allow the third carrier gas to flow in and to deliver the cooled third carrier gas to the second outlet pipe (40).

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