SOEC zero-carbon emission system based on power plant flue gas energy recovery

Abstract

The invention provides an SOEC zero-carbon emission system based on power plant flue gas energy recovery, and belongs to the field of flue gas energy recovery, the SOEC zero-carbon emission system comprises a boiler body, a first pipeline, a second pipeline and a third pipeline, the first pipeline is installed on the outer wall of the boiler body, the second pipeline is installed on the outer wall of the boiler body, and the third pipeline is installed outside the second pipeline; a connecting assembly and a collecting assembly are installed on the outer wall of the third pipeline, and a filtering assembly is arranged in the third pipeline. According to the flue gas treatment device, by arranging a filter plate and a scraper plate, after flue gas enters a third pipeline, the flowing speed can be further increased under the action of a flow guide plate, fan blades are blown to rotate, the fan blades drive the scraper plate to rotate through an output shaft, when the flue gas passes through the filter plate, smoke dust in the flue gas can be blocked by the filter plate, and the smoke dust in the flue gas is prevented from entering the third pipeline. And meanwhile, when the scraping plate rotates under the action of the fan blades, smoke dust accumulated on the surface of the filter plate can be treated.

Description

Technical Field

[0001] The present invention relates to the field of flue gas energy recovery, and in particular to a SOEC zero-carbon emission system based on flue gas energy recovery in a power plant. Background Art

[0002] The SOEC zero-carbon emission system based on flue gas energy recovery from power plants is an innovative energy utilization solution that aims to achieve the goal of zero carbon emissions by efficiently recovering and utilizing waste heat in flue gas from power plants, combined with solid oxide electrolysis cell (SOEC) technology, to capture, utilize and store carbon dioxide. It has the advantages of high efficiency and energy saving, zero carbon emissions, strong flexibility and significant environmental benefits. The waste heat boiler is one of the core equipment of the flue gas energy recovery system. It uses the heat of high-temperature flue gas to heat water or generate steam. This steam can be used for power generation, heating or other industrial purposes, thereby realizing the reuse of energy. The design of the waste heat boiler usually takes into account factors such as the temperature, flow rate and composition of the flue gas to ensure its efficient operation.

[0003] However, when the waste heat boiler is in use, the high-temperature flue gas will carry a large amount of smoke dust. When the dust content in the flue gas is high, these smoke dust particles are easy to accumulate on the heating surface of the waste heat boiler (such as the back of the heat transfer tube bundle). Ash accumulation will form an insulation layer, hindering the heat transfer between the flue gas and the heating surface, thereby reducing the heat exchange efficiency; at the same time, ash accumulation not only affects the heat exchange efficiency, but also may increase the resistance of the boiler system, resulting in more frequent cleaning operations, increasing maintenance costs and labor intensity. How to solve these problems has become an urgent problem to be solved by technicians in this field. Summary of the invention

[0004] In order to make up for the above shortcomings, the present invention provides a SOEC zero-carbon emission system based on flue gas energy recovery in a power plant, aiming to solve the problem that smoke and dust easily accumulate on the inner wall of the waste heat boiler in the existing emission system, resulting in a decrease in the heat exchange efficiency of the waste heat boiler.

[0005] The present invention is achieved in that:

[0006] The present invention provides a SOEC zero-carbon emission system based on flue gas energy recovery in a power plant, comprising:

[0007] Flue gas pretreatment system: In the flue gas pretreatment system, when preheating and recovering the flue gas, heat exchange treatment is performed through a waste heat boiler.

[0008] CO2 capture and recovery system: used to absorb carbon dioxide in flue gas.

[0009] Refrigeration system: used to provide the required cooling capacity for the entire process.

[0010] Energy conversion and utilization system: used to convert recovered waste heat into electrical energy.

[0011] Preferably, the waste heat boiler in the flue gas pretreatment system includes a boiler body, pipe one, pipe two and pipe three, pipe one is installed on the outer wall of the boiler body, pipe two is installed on the outer wall of the boiler body, pipe three is installed on the outside of pipe two, the outer wall of pipe three is respectively installed with a connecting component and a collecting component, and a filtering component is arranged inside pipe three.

[0012] Preferably, the connecting assembly includes a connecting plate, an extension tube, a sliding tube, a spring 1, a threaded rod and a nut, the connecting plate is installed on the outer wall of pipe 2, the extension tube is fixedly connected to the outer wall of the connecting plate, the sliding tube is fixedly connected to the outer wall of the connecting plate, the spring 1 is fixedly connected to the outer wall of the sliding tube, the threaded rod is installed on the outer wall of the connecting plate, and the nut is threadedly connected to the outer wall of the threaded rod.

[0013] Preferably, slide rails are provided inside pipe 2 and pipe 3, the outer walls of the extension tube and the sliding tube are slidably connected to the inner walls of the slide rails, the end of the spring 1 away from the sliding tube is fixedly connected to the inner wall of the slide rail inside pipe 3, and the threaded rod passes through pipe 2, pipe 3 and the connecting plate, and is slidably connected to pipe 2, pipe 3 and the connecting plate respectively.

[0014] By adopting the above technical solution, the extension tube can move inside the pipe two, the sliding tube can drive the spring one to slide inside the pipe three, the threaded rod can be moved by sliding, and fixed by the nut.

[0015] Preferably, the filter assembly includes a guide plate, a filter plate, a fan blade, a scraper, a fixed bracket, a convex plate, a convex column, a swing plate and a second spring, the guide plate is fixedly connected to the inner wall of the pipe three, the filter plate is fixedly connected to the inner wall of the pipe three, the fan blade is arranged inside the pipe three, the scraper is arranged on the outer wall of the filter plate, the fixed bracket is fixedly connected to the inner wall of the pipe three, the convex plate is fixedly connected to the outer wall of the scraper, the convex column is fixedly connected to the outer wall of the filter plate, the swing plate is installed on the outer wall of the convex column, and the second spring is fixedly connected to the outer wall of the swing plate.

[0016] Preferably, the outer wall of the fan blade is fixedly connected to the output shaft, the outer wall of the scraper is fixedly connected to the end of the output shaft away from the fan blade, the output shaft of the outer wall of the fan blade passes through the fixed bracket and extends to the outside of the fixed bracket, and the inner wall of the fixed bracket is rotatably connected to the outer wall of the output shaft.

[0017] By adopting the above technical solution, when the smoke pushes the fan blades to rotate, the scraper will be driven to rotate through the output shaft, thereby cleaning the surface of the filter plate, and the fixed bracket can support the fan blades and the scraper through the output shaft.

[0018] Preferably, the outer wall of the convex column is rotatably connected to the inner wall of the swing plate, one end of the swing plate extends into the rotation radius of the convex plate, and one end of the spring 2 away from the swing plate is fixedly connected to the inner wall of the pipe 3.

[0019] By adopting the above technical solution, the swing plate can rotate on the surface of the convex column. When the scraper drives the convex plate to rotate, the convex plate will collide with the swing plate. The existence of spring 2 can absorb the impact force generated by the collision and limit the rotation angle of the swing plate.

[0020] Preferably, the collecting assembly includes a stacking bin, a limiting ring, a fixing block and a bending rod, the stacking bin is located at the bottom of pipe three, the limiting ring is fixedly connected to the outer wall of pipe three, the fixing block is fixedly connected to the top of pipe three, and the bending rod is installed on the outer wall of pipe three.

[0021] Preferably, the outer wall of the limiting ring is slidably connected to the outer wall of the stacking bin, a track is provided on the outer wall of the pipe three, the outer wall of the bent rod is slidably connected to the inner wall of the track, the outer wall of the bent rod is respectively abutted against the outer wall of the stacking bin and the outer wall of the fixed block, and the outer wall of the bent rod is installed with bolts.

[0022] By adopting the above technical solution, the stacking bin can be moved to the outer wall of pipe three by sliding, the bent rod can be installed by sliding, and the bent rod can be fixed by using bolts, so that the bent rod has a limiting effect on the stacking bin.

[0023] The beneficial effects of the present invention are:

[0024] 1. By setting the filter plate and the scraper, when the flue gas enters the interior of the pipe three, the flow speed will be further increased under the action of the guide plate, and the fan blades will be blown to rotate, so that the fan blades drive the scraper to rotate through the output shaft. When the flue gas passes through the filter plate, the smoke inside the flue gas will be blocked by the filter plate, thereby filtering the flue gas. At the same time, when the scraper rotates under the action of the fan blades, the smoke accumulated on the surface of the filter plate can be processed, thereby avoiding the accumulation of smoke on the surface of the filter plate, causing the smoke to block the filter plate and reduce the filtering speed of the filter plate, thereby solving the problem that the inner wall of the waste heat boiler in the existing emission system is prone to smoke accumulation, resulting in a decrease in the heat exchange efficiency of the waste heat boiler.

[0025] 2. By setting the convex plate and the swing plate, when the scraper drives the convex plate to rotate, it will collide with the swing plate. The impact force generated during the collision will shake off the smoke and dust adsorbed on the scraper surface to prevent the smoke and dust from being adsorbed and accumulated on the surface of the scraper, resulting in a decrease in the cleaning effect of the scraper on the filter plate. At the same time, the swing plate will exert pressure on the second spring during the collision. When the swing plate is separated from the convex plate, the second spring will push the swing plate to reset and prepare for subsequent collision cleaning, thereby ensuring the cleaning effect of the scraper on the filter plate.

[0026] 3. By setting up the stacking bin and the bent rod, the smoke and dust cleaned up during the rotation of the scraper will fall into the inside of the stacking bin through the gap. At the same time, during the collision between the convex plate and the swing plate, the fallen dust will also fall into the inside of the stacking bin through the gap, which is convenient for operators to centrally handle the smoke and dust, and at the same time avoid the accumulation of smoke and dust inside the pipe, affecting the transportation of smoke. The stacking bin is fixed to the surface of the pipe by the bent rod. When the smoke and dust inside the stacking bin accumulates to a certain extent, the bent rod can be removed and the smoke and dust inside the stacking bin can be handled. The operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a schematic diagram of a flue gas pretreatment structure of a SOEC zero-carbon emission system based on flue gas energy recovery in a power plant provided by an embodiment of the present invention;

[0029] Figure 2 It is a schematic diagram of the pipeline structure of a SOEC zero-carbon emission system based on power plant flue gas energy recovery provided by an embodiment of the present invention;

[0030] Figure 3 It is a schematic diagram of the structure of connection components of a SOEC zero-carbon emission system based on flue gas energy recovery in a power plant provided by an embodiment of the present invention;

[0031] Figure 4 It is a schematic diagram of the stacking component structure of a SOEC zero-carbon emission system based on power plant flue gas energy recovery provided by an embodiment of the present invention;

[0032] Figure 5 It is a schematic diagram of the structural separation of stacking components of a SOEC zero-carbon emission system based on flue gas energy recovery in a power plant provided by an embodiment of the present invention;

[0033] Figure 6 It is a schematic diagram of the internal structure of a pipeline of a SOEC zero-carbon emission system based on flue gas energy recovery in a power plant provided by an embodiment of the present invention;

[0034] Figure 7 It is a schematic diagram of the structure of a filter component of a SOEC zero-carbon emission system based on flue gas energy recovery in a power plant provided by an embodiment of the present invention;

[0035] Figure 8 It is a flow chart of a SOEC zero-carbon emission system based on flue gas energy recovery from a power plant provided in an embodiment of the present invention.

[0036] In the figure: 1. boiler body; 2. pipeline one; 3. pipeline two; 4. pipeline three; 5. connection assembly; 501. connection plate; 502. extension pipe; 503. sliding pipe; 504. spring one; 505. threaded rod; 506. nut; 6. filter assembly; 601. guide plate; 602. filter plate; 603. fan blade; 604. scraper; 605. fixed bracket; 606. convex plate; 607. convex column; 608. swing plate; 609. spring two; 7. collection assembly; 701. stacking bin; 702. limit ring; 703. fixed block; 704. bent rod. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0038] Reference Figure 1-Figure 8 A SOEC zero-carbon emission system based on flue gas energy recovery in power plants includes a flue gas pretreatment system. The flue gas generated by the power plant is first subjected to dry desulfurization or wet desulfurization treatment to remove pollutants such as sulfur dioxide. In this process, the waste heat in the flue gas can be initially utilized. In the flue gas pretreatment system, a waste heat boiler is usually used for heat exchange treatment when preheating and recovering the flue gas.

[0039] In the CO2 capture and recovery system, in the absorption tower, the carbon dioxide in the flue gas reacts with the MEA solution and is absorbed into the solution to form a rich liquid. During this process, the temperature of the flue gas may decrease, but the waste heat can still be recovered through the heat exchanger. In addition, the rich liquid coming out of the absorption tower may need to be further heated by a heat exchanger before entering the analysis tower to improve the analysis efficiency, which is also a link in the waste heat recovery.

[0040] Refrigeration system: During the liquefaction process, the refrigeration system provides the required cooling capacity for the entire process. However, a certain amount of waste heat will be generated during the refrigeration process, which can also be recovered and utilized through a heat exchanger.

[0041] Energy conversion and utilization system, the recovered waste heat can be converted into electricity, thermal energy and other forms of energy, which can be used for power generation, heating, refrigeration and other purposes. For example, the steam generated by the waste heat boiler can drive the steam turbine to generate electricity, or be directly used for industrial heating and civil heating.

[0042] The waste heat boiler in the flue gas pretreatment system includes a boiler body 1, pipe one 2, pipe two 3 and pipe three 4. The pipe one 2 is installed on the outer wall of the boiler body 1, the pipe two 3 is installed on the outer wall of the boiler body 1, and the pipe three 4 is installed on the outside of the pipe two 3. The outer walls of the pipe three 4 are respectively installed with connecting components 5 and collecting components 7, and the interior of the pipe three 4 is provided with a filtering component 6.

[0043] The connecting assembly 5 includes a connecting plate 501, an extension tube 502, a sliding tube 503, a spring 504, a threaded rod 505 and a nut 506. The connecting plate 501 is installed on the outer wall of the pipe 2 3, the extension tube 502 is fixedly connected to the outer wall of the connecting plate 501, the sliding tube 503 is fixedly connected to the outer wall of the connecting plate 501, the spring 504 is fixedly connected to the outer wall of the sliding tube 503, the threaded rod 505 is installed on the outer wall of the connecting plate 501, and the nut 506 is threadedly connected to the outer wall of the threaded rod 505.

[0044] It should be noted that: sliding rails are provided inside pipe 2 3 and pipe 3 4, the outer walls of the extension tube 502 and the outer walls of the sliding tube 503 are both slidably connected to the inner walls of the sliding rails, the extension tube 502 can move inside pipe 2 3, the end of the spring 1 504 away from the sliding tube 503 is fixedly connected to the inner wall of the sliding rail inside pipe 3 4, the sliding tube 503 can drive the spring 1 504 to slide inside pipe 3 4, the threaded rod 505 passes through pipe 2 3, pipe 3 4 and the connecting plate 501, and are respectively slidably connected to pipe 2 3, pipe 3 4 and the connecting plate 501, the threaded rod 505 can be moved by sliding and fixed by a nut 506.

[0045] The connecting plate 501 is moved by sliding so that the connecting plate 501 drives the extension tube 502 to slide into the interior of the pipe 2 3, and then the threaded rod 505 is moved by sliding. After the threaded rod 505 is installed, the nut 506 is moved by rotating so that the nut 506 respectively abuts against the outer wall of the pipe 2 3, the outer wall of the connecting plate 501 and the outer wall of the pipe 3 4, thereby completing the connection between the pipe 3 4 and the pipe 2 3.

[0046] The filter assembly 6 includes a guide plate 601, a filter plate 602, a fan blade 603, a scraper 604, a fixed bracket 605, a convex plate 606, a convex column 607, a swing plate 608 and a spring 2 609, wherein the guide plate 601 is fixedly connected to the inner wall of the pipe 3 4, the filter plate 602 is fixedly connected to the inner wall of the pipe 3 4, the fan blade 603 is arranged inside the pipe 3 4, the scraper 604 is arranged on the outer wall of the filter plate 602, the fixed bracket 605 is fixedly connected to the inner wall of the pipe 3 4, the convex plate 606 is fixedly connected to the outer wall of the scraper 604, the convex column 607 is fixedly connected to the outer wall of the filter plate 602, the swing plate 608 is installed on the outer wall of the convex column 607, and the spring 2 609 is fixedly connected to the outer wall of the swing plate 608.

[0047] It should be noted that: the outer wall of the fan blade 603 is fixedly connected to the output shaft, and the outer wall of the scraper 604 is fixedly connected to the end of the output shaft away from the fan blade 603. When the smoke pushes the fan blade 603 to rotate, the scraper 604 will be driven to rotate through the output shaft, so as to clean the surface of the filter plate 602. The output shaft of the outer wall of the fan blade 603 passes through the fixed bracket 605 and extends to the outside of the fixed bracket 605. The inner wall of the fixed bracket 605 is rotatably connected to the outer wall of the output shaft. The fixed bracket 605 can control the fan blade 603 and the scraper 604 through the output shaft. 04 is supported, the outer wall of the convex column 607 is rotatably connected to the inner wall of the swing plate 608, one end of the swing plate 608 extends to the rotation radius of the convex plate 606, the swing plate 608 can rotate on the surface of the convex column 607, when the scraper 604 drives the convex plate 606 to rotate, the convex plate 606 will collide with the swing plate 608, and the end of the spring 2 609 away from the swing plate 608 is fixedly connected to the inner wall of the pipe 3 4. The existence of the spring 2 609 can absorb the impact force generated by the collision and limit the rotation angle of the swing plate 608.

[0048] By setting the filter plate 602 and the scraper 604, when the flue gas enters the interior of the pipe three 4, the flow speed will be further increased under the action of the guide plate 601, and the fan blades 603 will be blown to rotate, so that the fan blades 603 drive the scraper 604 to rotate through the output shaft. When the flue gas passes through the filter plate 602, the smoke inside the smoke will be blocked by the filter plate 602, thereby filtering the flue gas. At the same time, when the scraper 604 rotates under the action of the fan blades 603, the smoke accumulated on the surface of the filter plate 602 can be processed, thereby avoiding the smoke accumulation on the surface of the filter plate 602, causing the smoke to block the filter plate 602 and reduce the filtering speed of the filter plate 602, thereby solving the problem that the inner wall of the waste heat boiler in the existing emission system is prone to smoke accumulation, resulting in a decrease in the heat exchange efficiency of the waste heat boiler.

[0049] By setting the convex plate 606 and the swing plate 608, when the scraper 604 drives the convex plate 606 to rotate, it will collide with the swing plate 608. The impact force generated during the collision will shake off the smoke and dust adsorbed on the surface of the scraper 604, avoiding the smoke and dust from being adsorbed and accumulated on the surface of the scraper 604, resulting in a decrease in the cleaning effect of the scraper 604 on the filter plate 602. At the same time, the swing plate 608 will exert pressure on the spring 2 609 during the collision. When the swing plate 608 is separated from the convex plate 606, the spring 2 609 will push the swing plate 608 to reset and prepare for subsequent collision cleaning, thereby ensuring the cleaning effect of the scraper 604 on the filter plate 602.

[0050] After the smoke enters the interior of the pipe three 4, it drives the fan blades 603 to rotate, and drives the scraper 604 to rotate on the outer wall of the filter plate 602 through the output shaft. When the smoke passes through the filter plate 602, the smoke carried inside the smoke will be filtered by the filter plate 602. When the scraper 604 rotates, the smoke accumulated on the surface of the filter plate 602 will be cleaned, and when the scraper 604 rotates, it will drive the convex plate 606 to rotate. When the convex plate 606 collides with the swing plate 608, the smoke adsorbed on the surface of the scraper 604 will be shaken off, thereby completing the dust cleaning on the surface of the filter plate 602.

[0051] The collecting assembly 7 includes a stacking bin 701, a limiting ring 702, a fixing block 703 and a bending rod 704, the stacking bin 701 is located at the bottom of the pipe three 4, the limiting ring 702 is fixedly connected to the outer wall of the pipe three 4, the fixing block 703 is fixedly connected to the top of the pipe three 4, and the bending rod 704 is installed on the outer wall of the pipe three 4.

[0052] It should be noted that: the outer wall of the limit ring 702 is slidably connected to the outer wall of the stacking bin 701, and the stacking bin 701 can be moved to the outer wall of the pipe three 4 by sliding. The outer wall of the pipe three 4 is provided with a track, and the outer wall of the bent rod 704 is slidably connected to the inner wall of the track. The outer wall of the bent rod 704 is respectively abutted against the outer wall of the stacking bin 701 and the outer wall of the fixed block 703, and the outer wall of the bent rod 704 is installed with bolts. The bent rod 704 can be installed by sliding, and the bent rod 704 can be fixed by using bolts, so that the bent rod 704 has a limiting effect on the stacking bin 701.

[0053] By setting up the stacking bin 701 and the bent rod 704, the smoke and dust cleaned up during the rotation of the scraper 604 will fall into the stacking bin 701 through the gap. At the same time, during the collision between the convex plate 606 and the swing plate 608, the fallen dust will also fall into the stacking bin 701 through the gap, which is convenient for operators to centrally process the smoke and dust, and at the same time prevent the smoke and dust from accumulating inside the pipe and affecting the transportation of smoke. The stacking bin 701 is fixed to the surface of the pipe by the bent rod 704. When the smoke and dust inside the stacking bin 701 accumulates to a certain extent, the bent rod 704 can be removed, and the smoke and dust inside the stacking bin 701 can be processed. The operation is simple and convenient.

[0054] The stacking bin 701 is slidable, so that the stacking bin 701 moves to the bottom of the pipe three 4 under the restriction of the limit ring 702, and the bent rod 704 is moved by sliding, so that the bent rod 704 moves into the slide rail and simultaneously abuts against the outer wall of the stacking bin 701 and the outer wall of the fixed block 703. After the installation of the bent rod 704 is completed, the bolt is moved by rotating until the bolt penetrates the bent rod 704 and extends to the outer wall of the bent rod 704. At this time, the installation of the stacking bin 701 is completed. The smoke and dust dropped during the rotation of the scraper 604 and the smoke and dust dropped during the collision between the convex plate 606 and the swing plate 608 will enter the interior of the stacking bin 701 through the gap. After the smoke and dust are collected, the bent rod 704 can be removed and the smoke and dust inside the stacking bin 701 can be centrally processed. The operation is simple and convenient.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A SOEC zero-carbon emission system based on flue gas energy recovery from power plants, characterized in that: include: Flue gas pretreatment system: In the flue gas pretreatment system, when preheating and recovering the flue gas, heat exchange treatment is performed through a waste heat boiler; CO2 capture and recovery system: used to absorb carbon dioxide in flue gas; Refrigeration system: used to provide the required cooling capacity for the entire process; Energy conversion and utilization system: used to convert recovered waste heat into electrical energy.

2. The SOEC zero-carbon emission system based on flue gas energy recovery from power plants according to claim 1 is characterized by: The waste heat boiler in the flue gas pretreatment system comprises a boiler body (1), a pipe one (2), a pipe two (3) and a pipe three (4), wherein the pipe one (2) is installed on the outer wall of the boiler body (1), the pipe two (3) is installed on the outer wall of the boiler body (1), the pipe three (4) is installed outside the pipe two (3), the outer wall of the pipe three (4) is respectively installed with a connecting component (5) and a collecting component (7), and the interior of the pipe three (4) is provided with a filtering component (6).

3. A SOEC zero-carbon emission system based on flue gas energy recovery from a power plant according to claim 2, characterized in that: The connection assembly (5) comprises a connection plate (501), an extension tube (502), a sliding tube (503), a spring 1 (504), a threaded rod (505) and a nut (506); the connection plate (501) is mounted on the outer wall of the pipeline 2 (3); the extension tube (502) is fixedly connected to the outer wall of the connection plate (501); the sliding tube (503) is fixedly connected to the outer wall of the connection plate (501); the spring 1 (504) is fixedly connected to the outer wall of the sliding tube (503); the threaded rod (505) is mounted on the outer wall of the connection plate (501); and the nut (506) is threadedly connected to the outer wall of the threaded rod (505).

4. The SOEC zero-carbon emission system based on flue gas energy recovery from power plants according to claim 3 is characterized by: The interiors of the second pipe (3) and the third pipe (4) are both provided with slide rails, the outer walls of the extension pipe (502) and the outer walls of the sliding pipe (503) are both slidably connected to the inner walls of the slide rails, one end of the first spring (504) away from the sliding pipe (503) is fixedly connected to the inner wall of the slide rail inside the third pipe (4), and the threaded rod (505) passes through the second pipe (3), the third pipe (4) and the connecting plate (501), and is slidably connected to the second pipe (3), the third pipe (4) and the connecting plate (501) respectively.

5. The SOEC zero-carbon emission system based on power plant flue gas energy recovery according to claim 2 is characterized by: The filter assembly (6) comprises a guide plate (601), a filter plate (602), a fan blade (603), a scraper (604), a fixed bracket (605), a convex plate (606), a convex column (607), a swing plate (608) and a second spring (609), wherein the guide plate (601) is fixedly connected to the inner wall of the third pipe (4), the filter plate (602) is fixedly connected to the inner wall of the third pipe (4), and the fan blade (603) is arranged on the third pipe (4). ), the scraper (604) is arranged on the outer wall of the filter plate (602), the fixing bracket (605) is fixedly connected to the inner wall of the pipe three (4), the convex plate (606) is fixedly connected to the outer wall of the scraper (604), the convex column (607) is fixedly connected to the outer wall of the filter plate (602), the swing plate (608) is installed on the outer wall of the convex column (607), and the spring two (609) is fixedly connected to the outer wall of the swing plate (608).

6. A SOEC zero-carbon emission system based on flue gas energy recovery from power plants according to claim 5, characterized in that: The outer wall of the fan blade (603) is fixedly connected to an output shaft, the outer wall of the scraper (604) is fixedly connected to an end of the output shaft away from the fan blade (603), the output shaft of the outer wall of the fan blade (603) passes through the fixed bracket (605) and extends to the outside of the fixed bracket (605), and the inner wall of the fixed bracket (605) is rotatably connected to the outer wall of the output shaft.

7. A SOEC zero-carbon emission system based on flue gas energy recovery from a power plant according to claim 6, characterized in that: The outer wall of the convex column (607) is rotatably connected to the inner wall of the swing plate (608), one end of the swing plate (608) extends into the rotation radius of the convex plate (606), and one end of the spring 2 (609) away from the swing plate (608) is fixedly connected to the inner wall of the pipe 3 (4).

8. The SOEC zero-carbon emission system based on flue gas energy recovery from power plants according to claim 2, characterized in that: The collecting assembly (7) comprises a stacking bin (701), a limiting ring (702), a fixing block (703) and a bent rod (704); the stacking bin (701) is located at the bottom of the pipe three (4); the limiting ring (702) is fixedly connected to the outer wall of the pipe three (4); the fixing block (703) is fixedly connected to the top of the pipe three (4); and the bent rod (704) is installed on the outer wall of the pipe three (4).

9. A SOEC zero-carbon emission system based on flue gas energy recovery from power plants according to claim 8, characterized in that: The outer wall of the limiting ring (702) is slidably connected to the outer wall of the stacking bin (701), the outer wall of the pipe three (4) is provided with a track, the outer wall of the bent rod (704) is slidably connected to the inner wall of the track, the outer wall of the bent rod (704) is respectively abutted against the outer wall of the stacking bin (701) and the outer wall of the fixing block (703), and the outer wall of the bent rod (704) is installed with bolts.

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