Sintering cooling waste heat utilization power generation system

Abstract

The invention provides a sintering cooling waste heat utilization power generation system, and relates to the field of waste heat utilization of sintering circular coolers. The sintering cooling waste heat utilization power generation system comprises a thermoelectric system, a gas supply system and a circular cooler, the gas supply system comprises an air pipeline and a coal gas pipeline, and the air pipeline provides oxygen for a boiler; the gas pipeline provides gas for the boiler; the annular cooler is provided with an annular containing cavity and a trolley arranged in the containing cavity, and the trolley is used for bearing sintered ore. And the air pipeline communicates with the containing cavity, so that air in the air pipeline enters the boiler after absorbing heat of sintered ore on the trolley. By means of the mode that the air pipeline communicates with the containing cavity of the circular cooler, air can directly conduct heat exchange with the sinter in a contact mode, and waste heat of the sinter can be efficiently utilized. Meanwhile, in the process that the air absorbs heat more sufficiently, the sintered ore can be cooled more sufficiently.

Description

Technical Field

[0001] The invention belongs to the technical field of waste heat utilization of sintering ring coolers, and in particular relates to a sintering cooling waste heat utilization power generation system. Background Art

[0002] In today's steel industry, the sintering process is a major energy consumer, accounting for approximately 10% to 15% of a steel industry's total energy consumption. During the sintering process, cooling the sintered ore and exhausting waste gases generate significant amounts of waste heat. Specifically, the exhaust gas emitted during sinter cooling typically has a temperature between 300 and 400 degrees Celsius, placing this waste heat in the medium-low temperature range.

[0003] Existing methods for utilizing sinter waste heat typically involve installing the chimney used to cool the sinter in the water supply line of the thermoelectric system and adding a heat exchanger. This allows the waste heat from the sinter flue gas to be used to preheat the water in the water supply line, thereby recovering and reusing the waste heat. However, this waste heat recovery method not only requires the installation of additional heat exchangers but also is limited to utilizing the waste heat in the sinter flue gas, resulting in low waste heat utilization efficiency. Summary of the Invention

[0004] In view of this, the present invention provides a sintering cooling waste heat utilization power generation system, which aims to simplify the waste heat utilization equipment and improve the waste heat utilization efficiency.

[0005] The technical solution of the present invention is achieved as follows:

[0006] An embodiment of the present invention provides a sintering cooling waste heat utilization power generation system, including a thermoelectric system, including a boiler, a steam pipeline, a water supply pipeline and a cylinder, the water supply pipeline is connected between the cylinder and the boiler; the boiler is arranged between the steam pipeline and the water supply pipeline, so that the water transported by the water supply pipeline is converted into steam after being heated and transported to the cylinder through the steam pipeline to generate electricity; an air supply system, including an air pipeline and a gas pipeline, the air pipeline is connected to the boiler to provide oxygen to the boiler; the gas pipeline is connected to the boiler to provide fuel gas to the boiler; a ring cooler, having an annular accommodating chamber and a trolley arranged in the accommodating chamber, the trolley is used to carry sintered ore; the trolley can move relative to the accommodating chamber to transport the sintered ore from the feed port of the accommodating chamber to the discharge port of the accommodating chamber; wherein the air pipeline is connected to the accommodating chamber so that the air in the air pipeline absorbs the heat of the sintered ore on the trolley and then enters the boiler.

[0007] In one embodiment, the trolley has a supporting plate for supporting the sintered ore, the supporting plate is provided with air holes, and the accommodating cavity is provided with an air inlet 311 and an air outlet, the air inlet 311 is located below the supporting plate, and the air outlet is located above the supporting plate; the air pipeline includes a first air pipe section and a second air pipe section, one end of the first air pipe section is connected to the outside air, and the other end is connected to the air inlet 311; one end of the second air pipe section is connected to the air outlet, and the other end is connected to the boiler.

[0008] In one embodiment, the air inlet 311 is close to the discharge port, and the air outlet is close to the feed port.

[0009] In one embodiment, a plurality of air inlets 311 are provided; one end of the first air pipe section connected to the air inlet 311 has a first bus, and each branch pipe of the first bus is connected to each of the air inlets 311 in a one-to-one correspondence.

[0010] In one embodiment, a partition is further provided inside the accommodating chamber, and the partition is provided with an avoidance hole for the trolley and the sintered ore to pass through; there are at least two partitions to divide the accommodating chamber into at least two sub-chambers; wherein, the first sub-chamber is provided with the air inlet 311, and the upper end of the first sub-chamber is provided with a first connecting port; the second sub-chamber is provided with the air outlet, and the lower end of the second sub-chamber is provided with a second connecting port; the air pipeline also includes at least one connecting pipe, one end of the connecting pipe is connected to the first connecting port, and the other end is connected to the second connecting port.

[0011] In one embodiment, a plurality of second communication ports are provided; one end of the communication pipe connected to the second communication port has a second bus bar, and each branch pipe of the second bus bar is connected to each second communication port in a one-to-one correspondence.

[0012] In one embodiment, an exhaust system is further included, which includes a smoke exhaust pipe and a preheater; the smoke exhaust pipe is connected to the boiler to lead the smoke in the boiler out; wherein the smoke exhaust pipe, the gas pipeline and the first air pipe section all pass through the preheater, so that the gas in the air pipeline and the gas pipeline respectively absorbs the heat of the smoke in the smoke exhaust pipe.

[0013] In one embodiment, the boiler is provided with a plurality of gas supply ports; a third bus is provided at one end of the gas pipeline connected to the boiler, and a fourth bus is provided at one end of the second air pipe section connected to the boiler; wherein the branches of the third bus and the branches of the fourth bus are close to and merge with each other to be connected to each of the gas supply ports in a one-to-one correspondence.

[0014] In one embodiment, the air pipeline is provided with an induced draft fan to introduce external air.

[0015] In one embodiment, a reactor is provided in the boiler to desulfurize and remove dust from the flue gas in the boiler.

[0016] An embodiment of the present invention provides a sintering cooling waste heat utilization power generation system, which includes a thermoelectric system, an air supply system and a ring cooler. The thermoelectric system includes a boiler, a steam pipeline, a water supply pipeline and a cylinder, and the water supply pipeline is connected between the cylinder and the boiler; the boiler is arranged between the steam pipeline and the water supply pipeline, so that the water transported by the water supply pipeline is converted into steam after being heated and transported to the cylinder through the steam pipeline to generate electricity; the air supply system includes an air pipeline and a gas pipeline, the air pipeline is connected to the boiler to provide oxygen to the boiler; the gas pipeline is connected to the boiler to provide fuel gas to the boiler; the ring cooler has an annular accommodating chamber and a trolley arranged in the accommodating chamber, the trolley is used to carry sintered ore; the trolley can move relative to the accommodating chamber to transport the sintered ore from the feed port of the accommodating chamber to the discharge port of the accommodating chamber; wherein the air pipeline is connected to the accommodating chamber, so that the air in the air pipeline absorbs the heat of the sintered ore on the trolley and then enters the boiler. The present invention connects the air pipeline to the accommodating chamber of the ring cooler 3, allowing direct contact heat exchange between air and the sintered ore. This not only simplifies the waste heat utilization equipment and reduces the investment in additional equipment such as heat exchangers, but also more efficiently utilizes the waste heat of the sintered ore, improving waste heat utilization efficiency. Furthermore, as the air more fully absorbs heat, the sintered ore is also more fully cooled. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a sintering cooling waste heat power generation system provided by the present invention;

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of the medium-ring chiller.

[0020] Description of reference numerals:

[0021] 1. Thermoelectric system; 11. Boiler; 111. Air supply port; 12. Steam pipeline; 13. Water supply pipeline; 14. Cylinder; 15. Reactor; 2. Air supply system; 21. Air pipeline; 211. First air pipe section; 2111. First busbar; 212. Second air pipe section; 213. Connecting pipe; 22. Gas pipeline; 221. Third busbar; 3. Annular cooler; 31. Accommodating chamber; 311. Air inlet; 312. Air outlet; 313. Partition; 31a. First sub-chamber; 31b. Second sub-chamber; 314. First connecting port; 315. Second connecting port; 32. Trolley; 321. Loading plate; 4. Sintered ore; 5. Exhaust system; 51. Smoke exhaust pipe; 52. Preheater. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0024] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] In today's steel industry, the sintering process is a major energy consumer, accounting for approximately 10% to 15% of a steel industry's total energy consumption. During the sintering process, cooling the sintered ore and exhausting waste gases generate significant amounts of waste heat. Specifically, the exhaust gas emitted during sinter cooling typically has a temperature between 300 and 400 degrees Celsius, placing this waste heat in the medium-low temperature range.

[0026] Existing methods for utilizing sinter waste heat typically involve installing the chimney used to cool the sinter within the water supply line of the thermoelectric system and adding a heat exchanger. This allows the waste heat from the sinter flue gas to be used to preheat the water in the water supply line, thereby recovering and reusing the waste heat. However, this waste heat recovery method not only requires the installation of additional heat exchanger equipment but is also limited to utilizing waste heat from the sinter flue gas. Consequently, not only is waste heat utilization limited, but it can also result in inadequate cooling of the sinter.

[0027] In view of this, the present invention provides a sintering cooling waste heat utilization power generation system, which aims to simplify the waste heat utilization equipment and improve the waste heat utilization efficiency.

[0028] See also Figure 1 and Figure 2 The sintering cooling waste heat utilization power generation system includes a thermoelectric system 1 and a gas supply system 2. The thermoelectric system 1 is used to convert the heat energy generated by gas combustion into electrical energy; the gas supply system 2 is used to provide the thermoelectric system 1 with air and gas required for combustion.

[0029] Specifically, thermal power system 1 includes a boiler 11, a steam line 12, a water supply line 13, and a steam cylinder 14. Water supply line 13 is connected between steam cylinder 14 and boiler 11. Boiler 11 is located between steam line 12 and water supply line 13. Water transported by water supply line 13 is heated and converted into steam, which is then transported to steam cylinder 14 via steam line 12 to generate electricity. Gas supply system 2 includes air line 21 and gas line 22. Air line 21 communicates with boiler 11 to supply oxygen, while gas line 22 communicates with boiler 11 to supply fuel gas.

[0030] Also, see Figure 1 and Figure 2 The sintering cooling waste heat utilization power generation system also includes a ring cooler 3. The ring cooler 3 has an annular accommodating chamber 31 and a trolley 32 disposed in the accommodating chamber 31. The trolley 32 is used to carry the sintered ore 4. The trolley 32 can move relative to the accommodating chamber 31 to transport the sintered ore 4 from the feed port to the discharge port of the accommodating chamber 31.

[0031] Understandable, see Figure 1 and Figure 2If the sintered ore 4 is a spherical particle, gaps will be formed between the spherical particles when the spherical particles are piled together. If the sintered ore 4 is a non-spherical particle, gaps will also exist between the particles.

[0032] Specifically, the sintered ore 4 operates within the annular chamber 31 of the ring cooler 3 as follows: ① Receiving: Sintered ore 4 is discharged from the tail of the sintering machine, crushed by a single-roll crusher, and evenly discharged into the feed opening of the chamber 31 through a feed hopper and chute, where it falls onto a trolley 32. ② Traction by trolley 32: The trolley 32 is hingedly connected to a revolving frame, where friction plates and friction wheels contact each other. Driven by a drive device such as a motor, the friction wheels rotate, driving the friction plates through friction, which in turn drives the revolving frame, causing the trolley 32 to move in a circular motion along a horizontal circular track. ④ Discharging: When the trolley 32 reaches the discharge opening of the chamber 31, the horizontal circular track becomes a downward-curving track. The trolley 32, filled with sintered ore 4, tilts along the curved track. The cooled sintered ore 4 is discharged from the discharge hopper, passes through the discharge opening, and falls onto subsequent transportation equipment. ⑤ The trolley 32 is reset: after unloading, the trolley 32 rises along the curved track, returns to the horizontal state and continues to move forward with the rotary frame, and returns to the feed port of the accommodating chamber 31 again to start a new cycle.

[0033] The air line 21 is connected to the housing chamber 31, allowing the air in the air line 21 to absorb heat from the sintered ore 4 on the trolley 32 before entering the boiler 11. Because the air line and the housing chamber 31 are connected, the air in the air line can directly contact the sintered ore 4 in the housing chamber 31, exchanging heat. Specifically, air enters the housing chamber 31 of the annular cooler 3 through the air line 21, exchanging heat with the high-temperature sintered ore 4 on the trolley 32. The air absorbs heat from the sintered ore 4, raising its temperature. This hot air then flows through the air line 21 into the boiler 11. Within the boiler 11, the hot air provides an additional source of heat for heating the water, enabling the water supplied by the water supply line 13 to be more efficiently heated and converted into steam. In other words, after absorbing heat from the sintered ore 4, the air in the air line enters the boiler 11, raising the temperature within the boiler 11. This high temperature facilitates the conversion of the water within the boiler 11 into steam, thereby achieving heat recovery and reuse.

[0034] Compared with the traditional method of only utilizing the waste heat of the flue gas of the sintered ore 4 to preheat the water in the water supply pipeline 13, this waste heat utilization method not only fully utilizes the heat emitted by the sintered ore 4, but also simplifies the waste heat utilization equipment, reduces the use of additional heat exchangers, effectively improves the waste heat utilization efficiency, realizes more rational utilization of energy, and provides a more effective solution for energy conservation and emission reduction in steel industry production.

[0035] Furthermore, the present invention utilizes direct air contact with the sintered ore 4. Compared to the prior art method of using a heat exchanger to bring water in the water supply pipe 13 into contact with the flue gas in the sintered ore 4 exhaust pipe 51, this method omits the heat exchanger and simplifies the waste heat utilization equipment. Furthermore, the present invention utilizes not only the waste heat from the sintered ore 4 flue gas but also the heat of the sintered ore 4 itself, expanding the scope of waste heat utilization and improving waste heat utilization efficiency.

[0036] At the same time, since the heat released by the sintered ore 4 is more fully absorbed by the air, the sintered ore 4 is correspondingly cooled more fully.

[0037] In summary, the sintering cooling waste heat utilization power generation system provided by the present invention includes a thermoelectric system 1, an air supply system 2 and an annular cooler 3. The thermoelectric system 1 includes a boiler 11, a steam pipeline 12, a water supply pipeline 13 and a cylinder 14. The water supply pipeline 13 is connected between the cylinder 14 and the boiler 11; the boiler 11 is arranged between the steam pipeline 12 and the water supply pipeline 13, so that the water transported by the water supply pipeline 13 is converted into steam after being heated and transported to the cylinder 14 through the steam pipeline 12 to generate electricity; the air supply system 2 includes an air pipeline 21 and a gas pipeline 22, and the air pipeline 21 is connected to the cylinder 14. The air line 21 is connected to the boiler 11 to supply oxygen to the boiler 11; the gas line 22 is connected to the boiler 11 to supply fuel gas to the boiler 11; the ring cooler 3 has an annular chamber 31 and a trolley 32 disposed within the chamber 31. The trolley 32 is used to carry the sintered ore 4; the trolley 32 is movable relative to the chamber 31 to transport the sintered ore 4 from the inlet of the chamber 31 to the outlet of the chamber 31. The air line 21 is connected to the chamber 31 so that air within the air line 21 absorbs heat from the sintered ore 4 on the trolley 32 before entering the boiler 11. The present invention, by connecting the air line 21 to the chamber 31 of the ring cooler 3, allows direct contact heat exchange between the air and the sintered ore 4. This not only simplifies the waste heat utilization equipment and reduces the investment in additional equipment such as heat exchangers, but also more efficiently utilizes the waste heat of the sintered ore 4, improving waste heat utilization efficiency. Furthermore, as the air more fully absorbs heat, the sintered ore 4 is more fully cooled.

[0038] During the cooling process of the sintered ore 4 , since the sintered ore 4 is placed on the trolley 32 , the position where the sintered ore 4 contacts the trolley 32 , especially the bottom of the sintered ore 4 , makes it difficult for the heat to be dissipated.

[0039] In some embodiments, see Figure 1 and Figure 2In order to improve the cooling efficiency of the sintered ore 4 and ensure more effective heat exchange between the air and the sintered ore 4, the air inlet 311 and the air outlet 312 are configured so that the air flows from the bottom to the top of the sintered ore 4. The specific solution is as follows: the trolley 32 has a supporting plate 321 for supporting the sintered ore 4, and the supporting plate 321 is provided with air holes; the accommodating chamber 31 is provided with an air inlet 311 and an air outlet 312, with the air inlet 311 located below the supporting plate 321 and the air outlet 312 located above the supporting plate 321; the air pipeline 21 includes a first air pipe section 211 and a second air pipe section 212, one end of the first air pipe section 211 is connected to the outside air, and the other end is connected to the air inlet 311; one end of the second air pipe section 212 is connected to the air outlet 312, and the other end is connected to the boiler 11.

[0040] With this arrangement, outside air can enter the accommodating chamber 31 through the air inlet 311 of the first air pipe section 211. Because the air inlet 311 is below the support plate 321, the air can directly contact the bottom of the sintered ore 4, removing the heat from the bottom. The hot air then flows upward through the air holes in the support plate 321, enters the second air pipe section 212 through the air outlet 312, and ultimately enters the boiler 11. This bottom-up air flow more comprehensively absorbs heat from all parts of the sintered ore 4, avoiding the problem of insufficient cooling caused by the difficulty in dissipating heat at the contact point between the sintered ore 4 and the trolley 32. This further improves the cooling efficiency of the sintered ore 4 and the effectiveness of heat exchange between the air and the sintered ore 4.

[0041] During the cooling process of the sintered ore 4, the temperature of the sintered ore 4 immediately after loading onto the trolley 32 is higher, while the temperature of the sintered ore 4 immediately before unloading is lower. In other words, the temperature of the sintered ore 4 on the trolley 32 increases as it approaches the feed port, and decreases as it approaches the discharge port.

[0042] In some embodiments, see Figure 1 and Figure 2 In order to improve the heat exchange efficiency, the air inlet 311 is close to the discharge port, and the air outlet 312 is close to the feed port.

[0043] In this way, air enters the accommodating chamber 31 through the air inlet 311 near the discharge port, first contacting the relatively cool sintered ore 4. As the air flows upward and passes through the air holes in the support plate 321, it contacts the hotter sintered ore 4 near the feed port. This ensures that the cooler air contacts the cooler sintered ore 4, while the hotter air contacts the hotter sintered ore 4. This maintains a relatively stable temperature difference between the air and the sintered ore 4, improving heat exchange efficiency. Furthermore, it allows for more uniform cooling of the sintered ore 4, preventing quality issues with the sintered ore 4 caused by significant local temperature differences.

[0044] In some embodiments, see Figure 1 and Figure 2 Multiple air inlets 311 are provided; a first bus 2111 is provided at one end of the first air pipe section 211 connected to the air inlet 311. Each branch pipe of the first bus 2111 is connected to each air inlet 311 in a one-to-one correspondence. The bus can be understood as a pipe structure with multiple branch pipes that evenly distributes the air transported from the first air pipe section 211 to each air inlet 311.

[0045] In this way, the air entering the accommodating chamber 31 can be more evenly distributed below the sintered ore 4, further improving the uniformity of heat exchange between the air and the sintered ore 4. Because the multiple air inlets 311 allow air to contact the bottom of the sintered ore 4 from different positions, it avoids the situation where air is concentrated in a certain area and causes uneven heating of part of the sintered ore 4.

[0046] The embodiment of the present invention ensures that the sintered ore 4 at all locations is in full contact with the air through the arrangement of the various branch pipes of the first bus 2111, thereby effectively improving the overall cooling effect and waste heat utilization efficiency.

[0047] In some embodiments, see Figure 1 and Figure 2 In order to further improve the heat exchange efficiency, a partition 313 is further provided inside the accommodating cavity 31 to roughly separate the sintered bodies at different temperatures and allow the air in the air duct to pass through the sintered bodies multiple times.

[0048] Specifically, the partition 313 is provided with an escape hole for the trolley 32 and sintered ore 4 to pass through. There are at least two partitions 313, dividing the accommodating chamber 31 into at least two sub-chambers. The first sub-chamber 31a is provided with an air inlet 311, and a first connecting port 314 is provided at its upper end. The second sub-chamber 31b is provided with an air outlet 312, and a second connecting port 315 is provided at its lower end. The air line 21 also includes at least one connecting pipe 213, one end of which is connected to the first connecting port 314 and the other end to the second connecting port 315.

[0049] It can be seen from this that if the accommodating chamber 31 is divided into two, including a low-temperature accommodating chamber 31 and a high-temperature accommodating chamber 31, a connecting pipe 213 is required to connect the low-temperature accommodating chamber 31 and the high-temperature accommodating chamber 31; if the accommodating chamber 31 needs to be divided into three, including a low-temperature accommodating chamber 31, a medium-temperature accommodating chamber 31 and a high-temperature accommodating chamber 31, two connecting pipes 213 are required to connect the low-temperature accommodating chamber 31, the medium-temperature accommodating chamber 31 and the high-temperature accommodating chamber 31 in sequence; and so on.

[0050] To facilitate the explanation of the heat exchange principle, an example is taken in which two partitions 313 divide the annular containing chamber 31 into two. The specific heat exchange principle is: the outside air enters the air inlet 311 located in the low-temperature containing chamber 31 through the first air pipe section 211, and undergoes the first heat exchange with the sintered ore 4 in the low-temperature containing chamber 31, at which time the air temperature rises. Then, the hot air enters the connecting pipe 213 through the first connecting port 314, and then enters the high-temperature containing chamber 31 through the second connecting port 315. In the high-temperature containing chamber 31, the air undergoes a second heat exchange with the high-temperature sintered ore 4, further absorbing heat and causing the temperature to rise significantly. Afterwards, this part of the high-temperature air enters the second air pipe section 212 from the air outlet 312 located in the high-temperature containing chamber 31, and finally enters the boiler 11.

[0051] The embodiment of the present invention fully utilizes the heat of the sintered ore 4 in different temperature zones through multiple heat exchanges, significantly improves the heat exchange efficiency, and further enhances the effect of waste heat utilization.

[0052] In some embodiments, see Figure 1 and Figure 2 To further improve heat exchange efficiency, multiple second communication ports 315 are provided. A second busbar is located at the end of the communication tube 213 connected to the second communication ports 315. The branch pipes of the second busbar are connected to each of the second communication ports 315 in a one-to-one correspondence. In other words, the second busbar evenly distributes the air flowing into the communication tube 213 from the first communication port 314 to each of the second communication ports 315, allowing the air to more evenly enter the high-temperature chamber 31 for heat exchange with the sintered ore 4.

[0053] The present invention avoids the problem of air being concentrated in a certain place when entering the high-temperature containment chamber 31, resulting in insufficient heat exchange in some areas, by setting a second bus, further improving the uniformity and effectiveness of heat exchange, thereby better utilizing the heat of different temperature areas of the sintered ore 4 and significantly improving the efficiency of waste heat utilization.

[0054] In some embodiments, see Figure 1 and Figure 2 To utilize the heat from the flue gas generated by the boiler 11 of the thermal power system 1, a preheater 52 is installed at the exhaust of the boiler 11. Specifically, the sintering cooling waste heat utilization power generation system also includes an exhaust system 5. Specifically, the exhaust system 5 includes an exhaust pipe 51 and a preheater 52. The exhaust pipe 51 is connected to the boiler 11 to guide the flue gas from the boiler 11. The exhaust pipe 51, the gas pipeline 22, and the first air pipe section 211 all pass through the preheater 52, allowing the gases in the air pipeline 21 and the gas pipeline 22 to absorb the heat from the flue gas in the exhaust pipe 51.

[0055] With such an arrangement, the exhaust pipe 51 draws out the high-temperature flue gas generated by the boiler 11, and when passing through the preheater 52, the heat of the high-temperature flue gas is transferred to the preheater 52. The first air pipe section 211 and the gas pipeline 22 also pass through the preheater 52, so that the air and gas in the pipe can absorb the heat transferred from the flue gas. In this way, the air and gas entering the boiler 11 are preheated before entering, and the temperature is increased. For air, after the preheated air passes through the annular cooler 3 and enters the boiler 11, the combustion process in the boiler 11 can be more complete and efficient, which helps to improve the efficiency of the boiler 11 in converting water into steam; for gas, the preheated gas has a better combustion effect and can release more heat, further improving the energy utilization efficiency of the thermal power system 1.

[0056] In the embodiment of the present invention, the preheater 52 is provided to recover and utilize the waste heat of the flue gas generated by the boiler 11 of the thermoelectric system 1 .

[0057] In some embodiments, see Figure 1 and Figure 2 To improve the power generation efficiency of the thermal power system 1, the gas is also preheated. Specifically, the boiler 11 is equipped with multiple gas supply ports 111. A third busbar 221 is provided at the end of the gas pipeline 22 connected to the boiler 11, and a fourth busbar is provided at the end of the second air pipe section 212 connected to the boiler 11. The branches of the third busbar 221 and the branches of the fourth busbar are close to each other and merge, connecting one-to-one with each gas supply port 111.

[0058] Among them, the branch pipes are close to each other and merge to connect to each air supply port 111 one by one; it can be understood that any branch pipe in the third bus 221 and any branch pipe in the fourth bus are close to each other in space, and the ends of the two branches merge together and are jointly connected to one air supply port 111 among the multiple air supply ports 111.

[0059] In one embodiment, see Figure 1 and Figure 2 To better preheat the gas with hot air, a heat exchanger is installed between the third busbar 221 and the fourth busbar to preheat the gas. After the gas enters the third busbar 221 from the gas pipeline 22, it exchanges heat with the air preheated by the preheater 52 at the heat exchanger, further preheating the gas. The preheated gas is evenly distributed to each gas supply port 111 via the fourth busbar and enters the boiler 11. This doubly preheated gas burns more fully within the boiler 11, releasing more energy.

[0060] This embodiment of the present invention uses third busbar 221 to evenly distribute gas to each gas inlet 111, ensuring more uniform gas flow into boiler 11 and ensuring combustion stability. Furthermore, a fourth busbar, which branches off third busbar 221, preheats the gas before it enters gas inlets 111.

[0061] In some embodiments, see Figure 1 and Figure 2 Each branch of the third bus 221 is equipped with a flame retardant. These flame retardants effectively prevent flashback. The flame retardants on the branches of the third bus 221 have specialized internal structures, such as tiny pores or gratings. When a flame approaches the flame retardant, these structures quickly absorb the flame's heat, lowering the flame's temperature below the ignition point. This prevents further flame spread and ensures safe operation of the entire system.

[0062] In some embodiments, see Figure 1 and Figure 2 The air pipe 21 is provided with an induced draft fan to introduce outside air. The setting of the induced draft fan can flexibly adjust the flow rate and flow rate of the air in the air pipe 21 according to actual production needs. When the output of sintered ore 4 is large and more heat recovery is required, the power of the induced draft fan can be increased to allow more outside air to quickly enter the air pipe 21 and fully contact the sintered ore 4 for heat exchange, thereby improving the waste heat recovery efficiency. Conversely, when the output of sintered ore 4 is relatively small, the power of the induced draft fan can be appropriately reduced to reduce the air flow rate and avoid unnecessary energy consumption.

[0063] In some embodiments, see Figure 1 and Figure 2 A reactor 15 is provided in the boiler 11 to desulfurize and remove dust from the flue gas in the boiler 11 .

[0064] Reactor 15 can be filled with a specific desulfurizer and dust removal material. When the flue gas generated by boiler 11 passes through reactor 15, the desulfurizer chemically reacts with the sulfur-containing compounds in the flue gas, fixing the sulfur element and achieving the purpose of desulfurization. At the same time, the dust removal material captures dust particles in the flue gas through adsorption and interception, making the exhaust flue gas cleaner.

[0065] Compared to the traditional method of installing separate desulfurization and dust removal equipment outside the boiler 11, the present invention's method of performing desulfurization and dust removal directly within the boiler 11 not only saves space but also reduces heat loss during flue gas transportation. Furthermore, since the desulfurization and dust removal processes are completed within the boiler 11, flue gas can be treated more promptly and effectively, ensuring that the flue gas emitted by the thermal power system 1 during operation meets environmental standards.

[0066] Furthermore, since the flue gas generated by the sintered body is brought into the boiler 11 by the air in the air duct, there is no need to equip additional desulfurization, dust removal and cooling devices, which further simplifies the structure of the entire system and reduces equipment costs and maintenance difficulties.

[0067] In addition, the ring cooler 3 is also provided with a chimney and a cooling fan, as well as corresponding flue gas outlets and air inlets, so that the sintered ore can be cooled and the flue gas can be discharged even when the thermoelectric system stops working.

[0068] The specific flow direction of air in the air duct is as follows: first, under the action of the induced draft fan, the outside air enters the first air pipe section 211; then, it passes through the air inlet 311, the first connecting port 314, the second connecting port 315 and the air outlet 312 of the accommodating chamber 31 in sequence; and then enters the boiler 11 through the second air pipe section 212.

[0069] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by utilizing the contents of the present invention's description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A sintering cooling waste heat utilization power generation system, characterized in that: include: A thermoelectric system includes a boiler, a steam pipeline, a water supply pipeline, and a cylinder, wherein the water supply pipeline is connected between the cylinder and the boiler; the boiler is arranged between the steam pipeline and the water supply pipeline so that water transported by the water supply pipeline is heated and converted into steam, which is then transported to the cylinder through the steam pipeline to generate electricity; an air supply system comprising an air pipeline and a gas pipeline, wherein the air pipeline is connected to the boiler to provide oxygen to the boiler; the gas pipeline is connected to the boiler to provide fuel gas to the boiler; A ring cooler having an annular accommodating chamber and a trolley disposed in the accommodating chamber, the trolley being used to carry sintered ore; the trolley being capable of moving relative to the accommodating chamber to transport the sintered ore from the feed port of the accommodating chamber to the discharge port of the accommodating chamber; The air pipeline is connected to the accommodating chamber, so that the air in the air pipeline absorbs the heat of the sintered ore on the trolley and then enters the boiler.

2. The sintering cooling waste heat utilization power generation system according to claim 1 is characterized in that: The trolley has a carrying plate for carrying the sintered ore, the carrying plate is provided with air holes, the accommodating cavity is provided with an air inlet 311 and an air outlet, the air inlet 311 is located below the carrying plate, and the air outlet is located above the carrying plate; The air pipe includes a first air pipe section and a second air pipe section. One end of the first air pipe section is connected to the outside air, and the other end is connected to the air inlet 311; one end of the second air pipe section is connected to the air outlet, and the other end is connected to the boiler.

3. The sintering cooling waste heat utilization power generation system according to claim 2, characterized in that: The air inlet 311 is close to the discharge port, and the air outlet is close to the feed port.

4. The sintering cooling waste heat utilization power generation system according to claim 2, characterized in that: There are multiple air inlets 311 ; one end of the first air pipe section connected to the air inlet 311 has a first bus, and each branch pipe of the first bus is connected to each air inlet 311 in a one-to-one correspondence.

5. The sintering cooling waste heat utilization power generation system according to claim 2, characterized in that: A partition is further provided inside the accommodating chamber, and the partition is provided with an avoidance hole for the trolley and the sintered ore to pass through; there are at least two partitions to divide the accommodating chamber into at least two sub-chambers; wherein the first sub-chamber is provided with the air inlet 311, and the upper end of the first sub-chamber is provided with a first communication port; the second sub-chamber is provided with the air outlet, and the lower end of the second sub-chamber is provided with a second communication port; The air pipeline further includes at least one communicating pipe, one end of which is connected to the first communicating port, and the other end of which is connected to the second communicating port.

6. The sintering cooling waste heat utilization power generation system according to claim 5, characterized in that: There are multiple second communication ports. One end of the communication pipe connected to the second communication port has a second bus bar, and each branch pipe of the second bus bar is connected to each second communication port in a one-to-one correspondence.

7. The sintering cooling waste heat utilization power generation system according to claim 2, characterized in that: It also includes an exhaust system, the exhaust system including a smoke exhaust pipe and a preheater; the smoke exhaust pipe is connected to the boiler to lead the smoke in the boiler out; The smoke exhaust pipe, the gas pipeline and the first air pipe section all pass through the preheater, so that the gases in the air pipeline and the gas pipeline respectively absorb the heat of the smoke in the smoke exhaust pipe.

8. The sintering cooling waste heat utilization power generation system according to claim 2, characterized in that: The boiler is provided with a plurality of gas supply ports; a third bus is provided at one end of the gas pipeline connected to the boiler, and a fourth bus is provided at one end of the second air pipe section connected to the boiler; The branch pipes of the third bus bar and the branch pipes of the fourth bus bar are close to each other and merged to connect to the air supply ports in a one-to-one correspondence.

9. The sintering cooling waste heat utilization power generation system according to claim 1, characterized in that: The air pipeline is provided with an induced draft fan to introduce external air.

10. The sintering cooling waste heat utilization power generation system according to claim 1, characterized in that: A reactor is provided in the boiler to desulfurize and remove dust from the flue gas in the boiler.

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