High-temperature heat storage system and method based on comprehensive utilization of gas

Abstract

The invention relates to a high-temperature heat storage system and method based on comprehensive utilization of gas, the high-temperature heat storage system comprises an oxidation chamber, a plurality of heat storage chambers arranged side by side are arranged in the oxidation chamber, heat storage bodies are arranged in the heat storage chambers, and the space above the heat storage chambers is a combustion cavity. The other end of each branch pipeline is connected with a corresponding air outlet of a switching valve, an air inlet of the switching valve is connected to a ventilation air methane supply system through an air inlet header pipe, the combustion cavity is communicated with an air outlet pipeline and a bypass pipeline which are arranged in parallel, the bypass pipeline is connected to the air inlet header pipe, and a first fan and a first switch valve are arranged on the bypass pipeline. The air outlet pipeline is connected to the heat utilization system and provided with a second switch valve and a second fan. The heat storage system is high in heat storage body utilization rate.

Description

Technical Field

[0001] The present invention relates to the technical field of gas utilization, and particularly relates to a high-temperature regenerative heat storage system and method based on comprehensive gas utilization. Background Art

[0002] The statements herein only provide background art related to the present invention and do not necessarily constitute prior art.

[0003] During coal mining, a large amount of low-concentration gas is released, causing energy waste. At the same time, gas can produce a very strong greenhouse effect. The greenhouse effect generated by every 1 kg of methane is 24 times that of 1 kg of CO 2 . Therefore, reasonable recovery and utilization of mine drainage gas have double significance of environmental protection and energy conservation. The volume fraction of methane in mine drainage gas is (0.3%-0.7%). It is difficult to effectively utilize the heat of this part of gas by using traditional combustion technology. In view of the current industrial situation that ultra-low-concentration mine drainage gas is discharged into the atmosphere without treatment, according to the self-sustaining oxidation concentration of gas being about 0.3%, in order to reduce the oxidation efficiency required for ultra-low-concentration RTO operation and stabilize the working conditions. The regenerative thermal oxidation technology can realize the stable oxidation of low-concentration gas and is a very practical technology for the treatment and utilization of low-concentration gas.

[0004] In the current regenerative thermal oxidation system, there is a regenerator. Above the regenerator is a combustion chamber. Most of the gas enters the combustion chamber for combustion oxidation. The gas oxidation releases heat and stores the heat in the regenerator. In the current regenerative thermal oxidation system, since the combustion chamber is arranged above the regenerator, most of the heat is stored at the top of the regenerator, and the bottom of the regenerator cannot be effectively utilized, resulting in limited heat storage capacity of the regenerator and low utilization rate of the regenerator. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a high-temperature regenerative heat storage system and working method based on comprehensive gas utilization, which realizes the utilization of heat generated by gas oxidation and has a high utilization rate of the regenerator.

[0006] In order to achieve the above purpose, the present invention is realized by the following technical solutions:

[0007] In a first aspect, an embodiment of the present invention provides a high-temperature heat storage system based on comprehensive utilization of gas, which includes an oxidation chamber. Inside the oxidation chamber, a plurality of heat storage chambers are arranged side by side. A heat storage body is provided inside the heat storage chamber. The space above the heat storage chamber is a combustion chamber. The bottom of each heat storage chamber is connected to one end of a branch pipeline, and the other ends of all branch pipelines are connected to the air outlet corresponding to a switching valve. The air inlet of the switching valve is connected to a bleeder gas supply system through an intake main pipeline. The combustion chamber is communicated with a parallelly arranged outlet pipeline and a bypass pipeline. The bypass pipeline is connected to the intake main pipeline. A first fan and a first switching valve are arranged on the bypass pipeline. The outlet pipeline is connected to a heat utilization system and is provided with a second switching valve and a second fan.

[0008] Optionally, a gas burner is installed in the combustion chamber.

[0009] Optionally, the combustion chamber is further connected to one end of a circulation pipeline, and the other end of the circulation pipeline is connected to a pre-mixing device. The pre-mixing device is arranged between the intake main pipeline and the bleeder gas supply system.

[0010] Optionally, the switching valve includes a rotating pipe. A fixed pipe is rotatably connected to the outer periphery of the rotating pipe. The fixed pipe is provided with a plurality of first air outlets, and each first air outlet is connected to the intake end of the corresponding branch pipeline. A second air outlet corresponding to the first air outlet is provided on the pipe wall of the rotating pipe. The rotating pipe can rotate to enable the second air outlet to communicate with different first air outlets. The rotating pipe is connected to the intake main pipeline through a rotary joint.

[0011] Optionally, the rotating pipe is connected to a rotation driving mechanism, and the rotation driving mechanism can drive the rotating pipe to rotate around its own axis. The rotation driving mechanism includes a rotation driving part arranged on one side of the rotating pipe. The rotation driving part is connected to a gear, and the gear meshes with a toothed ring arranged on the outer pipe surface of the rotating pipe.

[0012] Optionally, the heat storage body includes an upper part and a lower part. The upper part is made of magnesite bricks or ceramic bricks by masonry, and the lower part is made of building bricks by masonry.

[0013] Further, the height of the heat storage body is 1.5 meters to 4.5 meters, and the number of heat storage chambers is 10 to 14.

[0014] Optionally, the heat utilization system is a power generation system, which includes a heat exchanger. The inlet of the high-temperature medium channel of the heat exchanger is communicated with the high-temperature medium channel. The outlet of the low-temperature medium channel of the heat exchanger is connected to a steam turbine generator through a pipeline. The inlet of the low-temperature medium channel is connected to the condensate collection end of the steam turbine generator through a pipeline, and a water pump is arranged on the pipeline between the inlet of the low-temperature medium channel and the condensate collection end.

[0015] Further, the outlet of the high-temperature medium channel is connected to the combustion chamber through a flue gas circulation pipeline, and a high-temperature heat source and a third fan are installed on the flue gas circulation pipeline.

[0016] Optionally, the heat utilization system further includes a heating system, and the heating system is connected to the outlet pipeline.

[0017] Optionally, the exhausted air gas supply system includes an exhausted air gas supply pipeline. The gas outlet end of the exhausted air gas supply pipeline is connected to the intake main pipe, and the gas inlet end is connected to the exhausted air gas source. A fourth fan is provided on the exhausted air gas supply pipeline.

[0018] In a second aspect, an embodiment of the present invention provides a working method of the high-temperature heat storage system based on comprehensive utilization of gas as described in the first aspect: The exhausted air gas supply system sequentially passes exhausted air gas into each heat storage chamber through a switching valve. The exhausted air gas sequentially flows through the heat storage chamber and the combustion chamber for combustion oxidation. The heat storage body in the heat storage chamber stores the heat released after the combustion oxidation of the gas. When the top temperature of the heat storage body reaches the set temperature, the first switching valve and the first fan on the bypass pipeline are opened. The high-temperature gas generated in the combustion chamber sequentially flows reversely into the bottoms of multiple heat storage chambers through the switching valve, and the bottom of the heat storage body stores the heat of the high-temperature gas.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. In the high-temperature heat storage system based on comprehensive utilization of gas of the present invention, the combustion chamber is connected with a bypass pipeline. The gas outlet end of the bypass pipeline is connected to the bottom of the heat storage chamber. The high-temperature gas generated by the combustion oxidation of the gas can enter the bottom of the heat storage chamber through the bypass pipeline, so as to flow reversely from bottom to top in the heat storage chamber, enabling the lower part of the heat storage body to store heat, thereby increasing the heat stored in the entire heat storage body, improving the utilization rate of the heat storage body, and being conducive to the comprehensive utilization of the heat generated by the combustion oxidation of the gas.

[0021] 2. In the high-temperature heat storage system based on comprehensive utilization of gas of the present invention, the switching valve is used to realize the introduction of the high-temperature gas in the bypass pipeline into different heat storage chambers, eliminating the need for multiple valves to switch the high-temperature gas between different high-temperature heat storage bodies, greatly reducing the number of valves used, reducing potential leakage points of the high-temperature gas, and enhancing the system tightness and operation safety.

[0022] 3. In the high-temperature heat storage system based on comprehensive utilization of gas of the present invention, a pre-mixer and a circulation pipeline are provided to mix the high-temperature air generated by combustion with the exhausted air gas before entering the heat storage chamber, increasing the temperature of the exhausted air gas entering the heat storage chamber and improving the utilization rate of the heat. Description of the Drawings

[0023] The accompanying drawings of the specification, which form a part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0024] Figure 1 is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0025] Figure 2 is a schematic diagram of the switching valve structure of Embodiment 1 of the present invention;

[0026] Figure 3 is a schematic diagram of the pre-mixing device structure of Embodiment 1 of the present invention;

[0027] Wherein, 1. high-temperature heat source, 2. first blower, 3. heat storage body, 4. heat exchanger, 5. switching valve, 6. pre-mixing device, 7. gas burner, 8. combustion chamber, 9. bypass pipeline, 10. turbine generator, 11. flue gas circulation pipeline, 12. water pump, 13. heating system, 14. intake main pipe, 15. first switching valve, 16. exhaust pipeline, 17. second switching valve, 18. circulation pipeline, 19. fourth blower, 20. third blower, 21. second blower, 22. check valve;

[0028] 6-1. sintered metal mesh plate, 6-2. gas inlet pipe, 6-3. mixed gas outlet pipe, 6-4. main pipe, 6-5. branch pipe. Detailed implementation manners

[0029] Embodiment 1

[0030] This embodiment provides a high-temperature heat storage system based on comprehensive utilization of gas, as Figure 1 described, including an oxidation chamber for burning and oxidizing the incoming exhausted gas. A plurality of heat storage chambers arranged side by side are provided in the oxidation chamber. In this embodiment, in order to store more heat and meet the heat utilization requirements after the gas is burned and oxidized, the number of the heat storage chambers is 1-3 times that of the heat storage chambers in a conventional RTO system. In this embodiment, the number of the heat storage chambers is 10-14, preferably 12. A heat storage body 3 is provided in each heat storage chamber. Compared with a conventional RTO system, the height of the heat storage body 3 is increased by 1-10 times. In this embodiment, the height of the heat storage body 3 is 1.5 meters - 4.5 meters. In the oxidation chamber, the space above the plurality of heat storage chambers is a combustion chamber 8, and a plurality of gas burners 7 are provided at the top of the combustion chamber 8.

[0031] The bottom of each heat storage chamber is connected to one end of a branch pipeline, and the other end of the branch pipeline is connected to the corresponding air outlet of the switching valve 5 located outside the oxidation chamber. The switching valve is provided with an intake channel, and the switching valve 5 can work to make the intake channel correspond to different air outlets so as to realize introducing gas into different heat storage chambers.

[0032] The intake end of the intake passage of the switching valve 5 is connected to the intake main pipe 14, and the intake main pipe 14 is connected to the exhausted gas supply system, and the exhausted gas supply system can introduce exhausted gas into the intake passage of the switching valve 5.

[0033] In a traditional RTO system, the exhausted gas mainly oxidizes and releases heat in the combustion chamber 8. Therefore, the top temperature of the regenerator 3 is relatively high and stores more heat, while the bottom temperature of the regenerator 3 is relatively low and cannot effectively store heat. Therefore, the utilization rate of the regenerator 3 is relatively low. To solve this problem, the high-temperature regenerative system of this embodiment is provided with a bypass pipeline 9. One end of the bypass pipeline 9 is connected to the combustion chamber 8, and the other end is connected to the intake main pipe 14. Along the gas flow direction, a first switching valve 15 and a first fan 2 are sequentially arranged on the bypass pipeline 9.

[0034] Open the first switching valve 15 and start the first fan 2. The first fan 2 can drive the high-temperature gas in the combustion chamber 8 into the bypass pipeline 9, and then enter different regenerator chambers through the bypass pipeline 9 and the switching valve 5 in sequence, and flow countercurrently in the regenerator chamber in the upward direction from bottom to top, heating the bottom of the regenerator 3, increasing the heat storage amount at the bottom of the regenerator 3, and improving the utilization rate of the regenerator.

[0035] In this embodiment, the regenerator 3 adopts a layered design, including an upper part and a lower part. The upper part is the high-temperature part and is built with magnesia bricks or ceramic bricks. The lower part is the low-temperature part and is built with building bricks. The heat storage material is built by using the existing low-resistance building method to ensure that the temperature difference between the upper and lower ends of the regenerator 3 is less than 10°C, and improve the treatment efficiency of ultra-low-concentration gas.

[0036] The division of the upper part and the lower part can be determined according to the actual working conditions and will not be described in detail here.

[0037] According to the key operating parameters confirmed by simulation calculation and experiment, the gas velocity in the regenerator 3 is reduced, the initial temperature field gradient of the regenerator is increased, the starting combustion part (550°C) of the gas is controlled in the regenerator chamber, and at the same time, the temperature of the combustion chamber is increased to above 1200°C, and the top temperatures of the combustion chamber 8 and the regenerator 3 are increased.

[0038] The combustion chamber 8 is also connected to an exhaust pipe 16. The exhaust pipe 16 is arranged in parallel with the bypass pipeline 9. Along the gas flow direction, a second switching valve 17 and a second fan 21 are sequentially arranged on the exhaust pipe 16. The exhaust pipe 16 is connected to a heat utilization system. After the second switching valve 17 is opened, the second fan 21 can drive the high-temperature gas in the combustion chamber 8 into the heat utilization system, thereby realizing the comprehensive utilization of the heat generated by the combustion and oxidation of the gas.

[0039] In order to further improve the heat utilization rate of high-temperature gas, the combustion chamber 8 is also connected to one end of the circulation pipeline 18. The circulation pipeline 18 is provided with a check valve 22 to ensure that the flow direction of the exhausted air gas is from the combustion chamber 8 to the pre-mixing device 6. The other end of the circulation pipeline 18 is connected to the pre-mixing device 6. The pre-mixing device 6 has two air inlets. One air inlet is connected to the outlet end of the circulation pipeline 18, and the other air inlet is connected to the exhausted air gas supply system. The outlet of the pre-mixing device 6 is connected to the inlet end of the intake main pipe. Inside the pre-mixing device 6, there are two layers of sintered metal mesh plates 6-1. There is a high-temperature gas inlet pipe between the two layers of sintered metal mesh plates 6-1. At the bottom of the mixer, there is a gas inlet pipe 6-2 for gas, and at the top, there is a mixed gas outlet pipe 6-3. The gas enters the mixer 6 through the gas inlet pipe 6-2 for gas, is dispersed after passing through the bottom layer of sintered metal mesh plate, and is mixed with the high-temperature gas introduced through the high-temperature gas inlet pipe. The mixed gas is further dispersed after passing through the top layer of sintered metal mesh plate and then flows out through the mixed gas outlet pipe.

[0040] The gas inlet pipe for gas is connected to the exhausted air gas supply system. The high-temperature gas inlet pipe is connected to the circulation pipeline 18. The mixed gas outlet pipe is connected to the switching valve 5. The high-temperature gas inlet pipe includes a main pipe 6-4. The main pipe 6-4 extends into the space between the two layers of sintered metal mesh plates. The main pipe is connected with a plurality of branch pipes 6-5, and the branch pipes 6-5 are used to introduce high-temperature gas into the space between the two layers of sintered metal mesh plates.

[0041] With this setting method, the high-temperature air in the combustion chamber can enter the pre-mixing device 6 through the circulation pipeline 18. The exhausted air gas introduced into the pre-mixing device 6 can be mixed with the high-temperature gas entering from the circulation pipeline 18, which increases the temperature of the exhausted air gas and is beneficial to the combustion and oxidation of the exhausted air gas after entering the oxidation chamber.

[0042] The exhausted air gas supply system includes an exhausted air gas supply pipeline. One end of the exhausted air gas supply pipeline is connected to the air inlet of the pre-mixing device 6, and the other end is connected to the exhausted air gas source. A fourth fan 19 is arranged on the exhausted air gas supply pipeline, and the fourth fan 19 can drive the exhausted air gas generated by the exhausted air gas source to enter the pre-mixing device 6.

[0043] As Figure 2 shown, the switching valve 5 is used to be arranged outside the oxidation chamber and includes a rotating pipe 5-1. A fixed pipe 5-2 is sleeved on the outer periphery of the rotating pipe 5-1. The rotating pipe 5-1 and the fixed pipe 5-2 are coaxially and rotatably connected, and the rotating pipe 5-1 can rotate around its own axis.

[0044] A sealing member is arranged between the rotating pipe 5-1 and the fixed pipe 5-2 to achieve sealing. Preferably, the sealing member is made of a graphite gasket or other high-temperature-resistant sealing members.

[0045] A plurality of first air outlets 5-4 are provided on the tube wall of the fixed tube 5-2. The number of the first air outlets 5-4 corresponds to the number of the regenerators and the branch pipelines. Each first air outlet 5-4 is connected to the intake end of a corresponding branch pipeline, and the outlet end of the branch pipeline is connected to the bottom of the corresponding regenerator.

[0046] Correspondingly, through holes corresponding to the air outlets on the tube wall of the fixed tube are also provided on the seal.

[0047] The top end of the rotating tube 5-1 is blocked. A second air outlet 5-5 corresponding to the first air outlet 5-4 is provided on the tube wall of the rotating tube 5-1. The rotating tube 5-1 rotates around its own axis, enabling the second air outlet 5-5 to correspond to different first air outlets 5-4, so as to introduce the exhausted air gas or the high-temperature gas into different regenerators.

[0048] The internal space of the rotating tube 5-1 and the second air outlet 5-5 together form the intake passage of the switching valve 5. The bottom end of the rotating tube 5-1 serves as the intake end, and the bottom end of the rotating tube 5-1 is connected to the outlet end of the intake main pipe 14 through a rotary joint for receiving the exhausted air gas or the high-temperature gas.

[0049] Further, in order to realize the automatic control of the rotating tube 5-1, the rotating tube 5-1 is connected to a rotation driving mechanism. In this embodiment, the bottom end or the top end of the rotating tube 5-1 extends out of the fixed tube. The part of the rotating tube 5-1 extending out of the fixed tube is connected to the rotation driving mechanism. The rotation driving mechanism includes a rotation driving member, and the rotation driving member adopts a motor or other devices capable of outputting rotational motion. The output shaft of the rotation driving member is connected to a gear, and the gear meshes with a gear ring arranged on the outer tube surface of the rotating tube 5-1. When the motor rotates, under the meshing action of the gear and the gear ring, the rotating tube can rotate around its own axis.

[0050] In the high-temperature regenerative system of this embodiment, the high-temperature gas in the bypass pipeline 9 and the exhausted air gas of the exhausted air gas supply system are introduced into different regenerators through the switching valve. There is no need to adopt multiple valves to realize the switching of the high-temperature gas or the exhausted air gas between different high-temperature regenerators, greatly reducing the valve usage amount, reducing potential leakage points of the high-temperature gas, and improving the system sealing performance and operation safety.

[0051] The exhaust pipeline 16 is connected to a heat utilization system. In this embodiment, the heat utilization system is a heating system 13 and a power generation system.

[0052] The power generation system includes a heat exchanger 4. The heat exchanger 4 can adopt existing equipment, which has a high-temperature medium channel and a low-temperature medium channel, and the media in the high-temperature medium channel and the low-temperature medium channel can exchange heat.

[0053] In this embodiment, the inlet of the high-temperature medium channel is communicated with the exhaust gas pipeline 16, and the high-temperature gas discharged from the combustion chamber 8 is used as the high-temperature medium.

[0054] The outlet of the high-temperature medium channel is connected to one end of the flue gas circulation pipeline 11, and the other end of the flue gas circulation pipeline 11 is connected to the combustion chamber 8. Along the flow direction of the high-temperature gas, a high-temperature heat source 1 and a third fan 20 are sequentially arranged on the flue gas circulation pipeline 11.

[0055] After heat exchange, the temperature of the high-temperature air decreases. Under the action of the third fan 20, it passes through the high-temperature heat source 1. The high-temperature heat source 1 can adopt existing electric heating equipment and will not be described in detail here. After the temperature rises again, it enters the combustion chamber 8 for recycling.

[0056] The outlet of the low-temperature medium channel of the heat exchanger 4 is connected to the turbine generator 10 through a pipeline. The steam output by it can drive the turbine generator 10 to work for power generation. The inlet of the low-temperature medium channel is connected to the condensate collection end of the turbine generator 10 through a pipeline, and a water pump 12 is arranged on the pipeline between the inlet of the low-temperature medium channel and the condensate collection end of the turbine generator 10. The water pump 12 can drive the condensate into the low-temperature medium channel to realize the recycling of water.

[0057] When the second switch valve 17 is opened and the second fan 21 is started, the high-temperature gas in the combustion chamber 8 can enter the high-temperature medium channel of the heat exchanger and exchange heat with the water in the low-temperature medium channel. The water is evaporated to form water vapor, and the water vapor drives the turbine generator 10 to generate electricity.

[0058] Through the setting of the power generation system, the off-peak electricity is converted into heat energy and stored. When needed, the second switch valve 17 is opened and the second fan 21 is started for power generation, which can realize the peak shaving and valley filling of the power grid and alleviate the contradiction between environmental power supply and demand.

[0059] In this embodiment, the temperature of the heat storage body and the heat user demand are monitored in real time, and the output temperature of the heat exchanger 4 is adjusted timely to realize the automatic matching between energy input and output.

[0060] In another embodiment, the outlet of the high-temperature medium channel of the heat exchanger is also connected with a drain pipe, which is arranged in parallel with the flue gas circulation pipeline, and a valve is arranged on the drain pipe to control the on-off of the drain pipe.

[0061] For the technology of connecting the exhaust pipeline 16 to the heating system 13 to provide heat to the heating system, existing technologies can be adopted, which also includes a heat exchanger. The exhaust pipeline 16 is connected to the high-temperature medium channel of the heat exchanger, and the low-temperature medium channel of the heat exchanger is filled with heating water. The heating water is heated by the high-temperature gas introduced by the exhaust pipeline 16 and then enters the heating pipe network for heating. Existing technologies can be adopted and will not be described in detail here. After the high-temperature gas recovers heat through the heating system 13, it can be discharged. Under the condition that the heating system is not working, it can be directly discharged. Multiple temperature sensors and flow sensors are arranged in the heating pipe network of the heating system to online monitor the temperature conditions of all user terminals in the heating pipe network, and based on this, the heating pipe network is precisely scheduled, greatly saving the energy consumption cost of the heating / cooling system.

[0062] Embodiment 2

[0063] This embodiment provides a working method of a high-temperature heat storage system based on comprehensive utilization of gas:

[0064] The exhausted gas supply system sequentially introduces exhausted gas into each heat storage chamber through the switching valve 5. The exhausted gas sequentially flows through the heat storage chamber and the combustion chamber for combustion oxidation. The initial combustion part of the gas (550 °C) is controlled within the heat storage body 3, and most of the combustion oxidation occurs in the combustion chamber 8, raising the temperature in the combustion chamber above 1200 °C. The heat storage body 3 in the heat storage chamber stores the heat released after the combustion oxidation of the gas, raising the temperature of the top layer of the combustion chamber 8 and the heat storage body 3. When the top temperature of the heat storage body 3 reaches the set temperature, the first switch valve and the first fan 2 on the bypass pipeline 9 are opened. The high-temperature gas generated in the combustion chamber 8 sequentially flows reversely into the bottom of multiple heat storage chambers through the switching valve 5, and the bottom of the heat storage body 3 stores the heat of the high-temperature gas.

[0065] In this embodiment, in a conventional gas heat storage oxidation system, the heat storage body is heated to 350 °C - 450 °C by one-way exhaust. Through the setting of the bypass pipeline 9 in this embodiment, the temperature of the entire heat storage body 3 can be heated to 900 °C, and the average temperature is increased by more than 2 times. Furthermore, the heat stored in the entire heat storage body is increased, the utilization rate of the heat storage body is improved, which is conducive to the comprehensive utilization of the heat generated by the combustion oxidation of gas.

[0066] Under normal working conditions, the entire high-temperature heat storage system is in a high-temperature heat storage standby state. When the mining production load is high or during peak electricity consumption periods, the second fan 21 and the second switch valve 17 are opened to generate electricity using the power generation system.

[0067] When the heat of the heat storage body 3 is not sufficient to oxidize the gas, the gas burner 7 works to ignite the gas and provide heat for the heat storage body 3.

[0068] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A high-temperature heat storage system based on comprehensive utilization of gas, comprising an oxidation chamber, a plurality of heat storage chambers arranged side by side are arranged inside the oxidation chamber, a heat storage body is arranged in the heat storage chamber, and the space above the heat storage chamber is a combustion chamber, characterized in that: The bottom of each heat storage chamber is connected to one end of a branch pipeline, the other end of all branch pipelines is connected to the air outlet corresponding to the switching valve, the air inlet of the switching valve is connected to the exhaust gas supply system through the air intake main pipe, the combustion chamber is connected to the air outlet pipeline and the bypass pipeline arranged in parallel, the bypass pipeline is connected to the air intake main pipe, a first fan and a first switch valve are arranged on the bypass pipeline, the air outlet pipeline is connected to the heat utilization system and is provided with a second switch valve and a second fan.

2. A high-temperature heat storage system based on comprehensive utilization of gas as claimed in claim 1, characterized in that: A gas burner is installed in the combustion chamber.

3. A high-temperature heat storage system based on comprehensive utilization of gas as claimed in claim 1, characterized in that: The combustion chamber is also connected to one end of a circulation pipeline, and the other end of the circulation pipeline is connected to a pre-mixer, which is arranged between the air intake main pipe and the exhaust gas supply system.

4. A high-temperature heat storage system based on comprehensive utilization of gas as claimed in claim 1, characterized in that: The switching valve includes a rotating tube, the outer periphery of which is rotatably connected to a fixed tube, the fixed tube is provided with a plurality of first air outlets, each first air outlet is connected to the air inlet end of a corresponding branch pipeline, a second air outlet corresponding to the first air outlet is provided on the wall of the rotating tube, the rotating tube can be rotated to achieve communication between the second air outlet and different first air outlets, and the rotating tube is connected to the air intake main pipe via a rotating joint.

5. A high-temperature heat storage system based on comprehensive utilization of gas as claimed in claim 4, characterized in that: The rotating tube is connected to a rotating drive mechanism, which can drive the rotating tube to rotate around its own axis. The rotating drive mechanism includes a rotating drive member arranged on one side of the rotating tube, the rotating drive member is connected to a gear, and the gear is meshed with a gear ring arranged on the outer tube surface of the rotating tube.

6. A high-temperature heat storage system based on comprehensive utilization of gas as claimed in claim 1, characterized in that: The heat storage body comprises an upper part and a lower part, wherein the upper part is made of magnesia bricks or ceramic bricks, and the lower part is made of building bricks; Furthermore, the height of the heat storage body is 1.5 meters to 4.5 meters, and the number of heat storage chambers is 10 to 14.

7. A high-temperature heat storage system based on comprehensive utilization of gas as claimed in claim 1, characterized in that: The heat utilization system is a power generation system, including a heat exchanger, wherein the inlet of the high-temperature medium channel of the heat exchanger is connected to the high-temperature medium channel, the outlet of the low-temperature medium channel of the heat exchanger is connected to the turbine generator through a pipeline, the inlet of the low-temperature medium channel is connected to the condensate collection end of the turbine generator through a pipeline, and a water pump is provided on the pipeline between the inlet of the low-temperature medium channel and the condensate collection end; Furthermore, the outlet of the high-temperature medium channel is connected to the combustion chamber through a flue gas circulation pipeline, and a high-temperature heat source and a third fan are installed on the flue gas circulation pipeline.

8. A high-temperature heat storage system based on comprehensive utilization of gas as claimed in claim 1, characterized in that: The heat utilization system also includes a heating system, which is connected to the air outlet pipeline.

9. A high-temperature heat storage system based on comprehensive utilization of gas as claimed in claim 1, characterized in that: The exhaust gas supply system includes an exhaust gas supply pipeline, the air outlet of the exhaust gas supply pipeline is connected to the air inlet main pipe, the air inlet end is connected to the exhaust gas source, and a fourth fan is arranged on the exhaust gas supply pipeline.

10. A working method of a high temperature heat storage system based on comprehensive utilization of gas according to any one of claims 1 to 9, characterized in that: The exhaust gas supply system introduces exhaust gas into each heat storage chamber in turn through the switching valve. The exhaust gas enters the combustion chamber and burns and oxidizes. The heat storage body in the heat storage chamber stores the heat released after the gas is burned and oxidized. When the top temperature of the heat storage body reaches the set temperature, the first switch valve and the first fan on the bypass pipeline are opened, and the high-temperature gas generated in the combustion chamber is reversely introduced from the bottom of multiple heat storage chambers in turn through the switching valve, and the bottom of the heat storage body stores the heat of the high-temperature gas.

Images