A high-efficiency and energy-saving carbon dioxide capture device for electrolytic aluminum production process

Abstract

This utility model relates to the field of carbon dioxide capture technology and discloses a high-efficiency and energy-saving carbon dioxide capture device in the electrolytic aluminum production process. The device includes a tank structure, comprising a cylindrical body, a heat exchange structure located inside the cylindrical body, and a first shell and a second shell respectively installed at both ends of the cylindrical body. The heat exchange structure includes two baffles and multiple heat exchange tubes, with the multiple heat exchange tubes installed between the two baffles. A cleaning component is provided inside the cylindrical body. The cleaning component includes a reciprocating screw and a moving plate. The reciprocating screw is installed between the two baffles, and the moving plate is fitted onto the reciprocating screw. Multiple sleeves fitted onto the outside of the heat exchange tubes are provided on both sides of the moving plate. This utility model converts the rotational motion of the reciprocating screw into the axial reciprocating movement of the moving plate. Bristles installed inside the moving plate follow the movement to cover the outer wall of the heat exchange tubes. The bristles continuously scrape the tube wall during the reciprocating movement, forming a periodic cleaning cycle, effectively inhibiting the heat exchange efficiency decay caused by the accumulation of ash and dirt.

Description

Technical Field

[0001] This utility model relates to the field of carbon dioxide capture technology, specifically to a high-efficiency and energy-saving carbon dioxide capture device in the electrolytic aluminum production process. Background Technology

[0002] Electrolytic aluminum production is an industrial process that extracts metallic aluminum from alumina through electrolysis. During the electrolytic aluminum production process, a large amount of carbon dioxide is generated, which requires carbon dioxide capture technology. Carbon dioxide capture refers to the technology of separating and collecting carbon dioxide from industrial emission sources or the atmosphere, aiming to reduce greenhouse gas emissions and mitigate climate change. In existing technologies, carbon dioxide capture devices mainly consist of flue gas heat exchangers, cooling mechanisms, treatment mechanisms, and carbon dioxide absorption mechanisms.

[0003] During processing, high-temperature flue gas enters through a flue gas heat exchanger and is cooled to 90-100°C through indirect heat exchange with cold water. The flue gas, after heat exchange in the heat exchanger, is then transported to a cooling mechanism where it is cooled to 40°C. The flue gas is then transported to a processing unit where it is treated by an electrostatic precipitator. The electrostatic precipitator uses electrostatic adsorption to adsorb impurities and particulate matter in the flue gas. Afterward, an alkaline solution is sprayed from a nozzle to treat acidic gases in the adsorbed flue gas. Finally, the flue gas is transported to a carbon dioxide absorption mechanism where carbon dioxide is absorbed. However, because the flue gas carries a large amount of dust, it easily accumulates on the outer wall of the heat exchange tubes after entering the heat exchanger, forming a dust layer. This dust layer severely hinders the heat conduction efficiency of the heat exchange tubes. To solve this problem, existing technologies typically require disassembling the flue gas heat exchanger to clean the dust accumulation on the outer wall of the heat exchange tubes. This disassembly and cleaning process is not only cumbersome but also directly affects production progress. Utility Model Content

[0004] The purpose of this utility model is to provide a high-efficiency and energy-saving carbon dioxide capture device in the electrolytic aluminum production process, which solves the problem that it is necessary to stop the machine from time to time and spend a lot of manpower and resources to disassemble the flue gas heat exchanger in order to clean the ash on the outer wall of the flue gas heat exchange tube, thus making the cleaning process not only cumbersome but also directly affecting the production progress.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to a high-efficiency and energy-saving carbon dioxide capture device in the electrolytic aluminum production process. It includes a tank structure comprising a cylindrical body, a heat exchange structure located inside the cylindrical body, and a first shell and a second shell respectively installed at both ends of the cylindrical body. The heat exchange structure includes two baffles and multiple heat exchange tubes installed between the two baffles. A cleaning component is provided inside the cylindrical body. The cleaning component includes a reciprocating screw and a moving plate. The reciprocating screw is installed between the two baffles, and the moving plate is fitted onto the reciprocating screw. Multiple sleeves fitted onto the outside of the heat exchange tubes are provided on both sides of the moving plate. One end of the reciprocating screw is connected to a connecting rod, and the end of the connecting rod extending out of the second shell is connected to a driven wheel, which is connected to a power input end.

[0007] Furthermore, the device also includes a power input end, which includes a motor. The output shaft of the motor is connected to a drive wheel, and the drive wheel and the driven wheel are connected by a belt.

[0008] Furthermore, the opening of the drain pipe faces downwards, and a branch pipe is provided on the drain pipe. An inverted U-shaped vent pipe is connected to the branch pipe. A sealing component is installed at the liquid inlet end of the inverted U-shaped vent pipe, and an adjustment component is installed inside the liquid outlet end of the drain pipe. The adjustment component is located on the lower side of the branch pipe.

[0009] Furthermore, the regulating assembly includes a valve plate located inside the drain pipe. The valve plate is mounted on a connecting shaft passing through the drain pipe. A worm gear is fixedly mounted at the end of the connecting shaft, and the worm gear meshes with a worm. Meanwhile, the worm is mounted on a connecting plate fixed on the outer surface of the drain pipe, and a handle is fixed at one end of the worm.

[0010] Furthermore, the sealing assembly includes a mounting plate installed inside the inverted U-shaped exhaust pipe. The mounting plate has a drain hole in the middle, and a cover fits inside the drain hole. The cover is installed on the mounting plate by an elastic connector, and the cover rotates to the side away from the exhaust pipe.

[0011] Furthermore, a connecting seat is provided on one side of the mounting plate, and the elastic connecting member includes a second connecting rod. One end of the second connecting rod is fixed to the end face of the cover, and the other end of the second connecting rod is connected to the connecting seat through a pin. A torsion spring is installed on the pin.

[0012] Furthermore, both sides of the baffle are provided with raised rings, and sealing rings are installed on the outer surfaces of the two raised rings. Sealing grooves are opened on the end face of the cylinder and the end face of the shell, and the two sealing rings are respectively interference-fitted into the corresponding sealing grooves.

[0013] Furthermore, two baffles are respectively installed at the connection between the cylinder and the first shell and at the connection between the cylinder and the second shell, and through holes are provided on the baffles, with both ends of the heat exchange tube located in the through holes on the two baffles respectively.

[0014] Furthermore, a partition plate is installed between the baffle and the first housing, and the partition plate divides the through hole on the baffle into upper and lower parts.

[0015] This utility model has the following beneficial effects:

[0016] (1) This utility model drives the active wheel to rotate through the motor, and drives the driven wheel to rotate through the belt. The power is transmitted to the reciprocating screw through the connecting rod. The rotational motion of the reciprocating screw is converted into the axial reciprocating movement of the moving plate. The bristles installed in the moving plate follow and cover the outer wall of the heat exchange tube. The bristles continuously scrape the tube wall during the reciprocating movement, and peel off the surface dust through mechanical friction. The dust falls to the bottom of the cylinder by gravity. This movement covers the entire length of all heat exchange tubes, forming a periodic cycle cleaning, which effectively inhibits the heat exchange efficiency decay caused by the accumulation of dust.

[0017] (2) When condensate and carbon dioxide gas accumulate in the drain pipe, the pressure pushes the connecting rod to rotate against the preload of the torsion spring, causing the cover to detach from the drain hole. The gas-liquid mixture then rushes open the sealing assembly and enters the inverted U-shaped exhaust pipe, thus realizing automatic overpressure release.

[0018] (2) The rotating handle drives the worm to rotate, and the worm gear meshes with the connecting shaft to rotate synchronously, forcing the valve plate to rotate to the open position in the drain pipe. The cleaning fluid is discharged directly to the bottom channel of the drain pipe under the action of gravity, thereby bypassing the inverted U-shaped exhaust pipe. This path isolation reduces the amount of cleaning fluid containing impurities entering the inverted U-shaped exhaust pipe.

[0019] Of course, any product implementing this utility model does not necessarily need to achieve all of the above advantages at the same time. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present utility model. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the overall structure of the present utility model. Figure 2 ;

[0022] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0023] Figure 4 This is a cross-sectional view of the overall structure of this utility model;

[0024] Figure 5 Exploded view of the structure of baffle, heat exchange tube, reciprocating screw and moving plate;

[0025] Figure 6 This is a schematic diagram of the closed component.

[0026] Figure 7This is a schematic diagram of the automatic overpressure relief state.

[0027] Figure 8 Exploded view of the enclosed component and inverted U-shaped exhaust pipe structure;

[0028] Figure 9 Exploded view of the baffle and sealing ring structure;

[0029] Figure 10 To adjust the exploded view of the component structure;

[0030] Figure 11 This is a schematic diagram of a closed component structure;

[0031] The attached diagram lists the components represented by each number as follows:

[0032] In the diagram: 1. Cylinder; 101. Air inlet pipe; 102. Liquid inlet pipe; 103. Drain pipe; 104. Connecting plate; 2. Baffle; 201. Divider plate; 202. Convex ring; 3. Shell; 301. Water inlet pipe; 302. Drain pipe; 4. Heat exchanger pipe; 5. Cleaning assembly; 501. Reciprocating screw; 502. Connecting rod one; 503. Driven wheel; 504. Moving plate; 505. Pipe sleeve; 506. Motor; 507. Drive wheel; 508. Belt; 6. Adjustment assembly; 601. Valve plate; 602. Connecting shaft; 603. Worm gear; 604. Worm; 605. Handle; 7. Inverted U-shaped exhaust pipe; 8. Sealing assembly; 801. Mounting plate; 802. Connecting seat; 803. Connecting rod two; 804. Cover; 805. Protrusion; 806. Torsion spring; 9. Bushing; 10. Sealing ring; 11. Second housing. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, and the description of the technical features and technical solutions in the prior art is omitted.

[0034] Please see Figures 1-11As shown, this utility model is a high-efficiency and energy-saving carbon dioxide capture device in the electrolytic aluminum production process. It includes a tank structure, comprising a cylindrical body 1, a heat exchange structure located inside the cylindrical body 1, a first shell 3 and a second shell 11 respectively installed at both ends of the cylindrical body 1. The heat exchange structure includes two baffles 2 and multiple heat exchange tubes 4, with the multiple heat exchange tubes 4 installed between the two baffles 2. A cleaning component 5 is provided inside the cylindrical body 1. The cleaning component 5 includes a reciprocating screw 501 and a moving plate 504. The reciprocating screw 501 is installed between the two baffles 2, and the moving plate 504 is fitted onto the reciprocating screw 501. Multiple sleeves 505 are provided on both sides of the moving plate 504, fitted onto the outside of the heat exchange tubes 4. One end of the reciprocating screw 501 is connected to a connecting rod 502, and the end of the connecting rod 502 extending out of the second shell 11 is connected to a driven wheel 503, which is connected to a power input end. The shell 3 is mounted on a vertical plate, and the installation height of the shell 3 can be adjusted by replacing the vertical plate.

[0035] Flange structures are provided at the ports of the cylinder 1, the outer side of the baffle 2, the ports of the first shell 3 and the second shell 11, and the corresponding flange structures are connected by bolts.

[0036] Both sides of the baffle 2 are provided with convex rings 202, and sealing rings 10 are installed on the outer surface of the two convex rings 202. Sealing grooves are opened on the end face of the cylinder 1, the end face of the first shell 3 and the end face of the second shell 11. The two sealing rings 10 are respectively interference-fitted into the interior of the corresponding sealing grooves. The interference fit design of the sealing rings 10 causes radial deformation under the compression of the convex rings 202 and the sealing grooves, thereby reducing gas and liquid leakage.

[0037] The upper part of the cylinder 1 is connected to an air inlet pipe 101 and a liquid inlet pipe 102, and the lower part of the cylinder 1 is connected to a drain pipe 103. The air inlet pipe 101 is used to discharge high-temperature exhaust gas containing carbon dioxide, the liquid inlet pipe 102 is used to discharge clean water, and the drain pipe 103 is used to discharge cleaned wastewater and exhaust gas. The air inlet pipe 101 and the drain pipe 103 are located on both sides of the cylinder 1, thereby increasing the contact area between the exhaust gas and the heat exchange tube 4 and improving the cooling efficiency.

[0038] like Figure 4 As shown, two baffles 2 are respectively installed at the connection between the cylinder 1 and the first shell 3 and at the connection between the cylinder 1 and the second shell 11, and through holes are provided on the baffles 2. The two ends of the heat exchange tube 4 are respectively located in the through holes on the two baffles 2.

[0039] The first housing 3 is connected to an inlet pipe 301 and a drain pipe 302. A baffle 2 and the first housing 3 are connected to a partition plate 201, which divides the through hole on the baffle 2 into upper and lower parts. At the same time, the partition plate 201 also divides the first housing 3 into upper and lower cavities. The upper cavity of the first housing 3 is connected to the inlet pipe 301, and the lower cavity of the first housing 3 is connected to the drain pipe 302.

[0040] Multiple heat exchange tubes 4 are divided into upper and lower groups by partition plate 201. The upper group of heat exchange tubes 4 is connected between the two upper chambers, and the lower group of heat exchange tubes 4 is connected between the two lower chambers.

[0041] Cold water passes sequentially through the inlet pipe 301, the upper cavity of the first shell 3, the upper heat exchange tube 4, the second shell 11, the lower heat exchange tube 4, the lower cavity of the first shell 3, and is finally discharged through the drain pipe 302.

[0042] When cold water passes through heat exchange tube 4, it absorbs the temperature of the high-temperature waste gas, thus realizing the recovery of the residual heat of the high-temperature waste gas. After the high-temperature waste gas containing carbon dioxide is cooled down, it is discharged and collected through the branch pipe of the discharge pipe 103.

[0043] During heat exchange, high-temperature exhaust gas containing carbon dioxide enters the interior of cylinder 1 through inlet pipe 101 and is discharged again through branch pipe of outlet pipe 103. The high-temperature exhaust gas containing carbon dioxide causes the temperature inside cylinder 1 to rise. During the heating process, heat exchange tube 4 absorbs the temperature of the surrounding environment.

[0044] like Figure 5 As shown, this embodiment discloses an implementation method for cleaning the heat exchange tube 4 using the cleaning component 5:

[0045] The cylinder 1 is equipped with a cleaning component 5. The cleaning component 5 includes a reciprocating screw 501 and a moving plate 504. The reciprocating screw 501 is rotatably engaged between two baffles 2. The moving plate 504 is mounted on the reciprocating screw 501. The moving plate 504 is provided with multiple sleeves 505 that are sleeved on the outside of the heat exchange tubes 4. The number of sleeves 505 is the same as the number of heat exchange tubes 4. One end of the reciprocating screw 501 is connected to a connecting rod 502. The end of the connecting rod 502 that extends to the outside of the second housing 11 is connected to a driven wheel 503. The driven wheel 503 is connected to the power input end.

[0046] When cleaning the heat exchange tube 4, the equipment needs to be stopped. Since the high-temperature exhaust gas contains a lot of dust, when the high-temperature exhaust gas passes through the inside of the cylinder 1, a lot of dust will adhere to the outer surface of the heat exchange tube 4. The outer surface of the heat exchange tube 4 is cleaned by the cleaning component 5, thereby solving the problem of the heat exchange efficiency of the heat exchange tube 4 decreasing after long-term operation.

[0047] Specifically, the power input end includes a motor 506, and a drive wheel 507 is connected to the output shaft of the motor 506. The drive wheel 507 and the driven wheel 503 are connected by a belt 508. A through hole is opened in the first housing 3. A bushing 9 fitted on the connecting rod 502 is fitted into the through hole. One end of the connecting rod 502 is connected to the reciprocating screw 501 through a coupling. The other end of the connecting rod 502 is fitted with the driven wheel 503. The moving plate 504 is provided with a light hole. A crescent-shaped protrusion that mates with the reciprocating screw 501 is installed inside the light hole.

[0048] During operation, the motor 506 first drives the drive wheel 507 to rotate, which in turn drives the driven wheel 503 to rotate via the belt 508. The power is transmitted to the reciprocating screw 501 via the connecting rod 502. The rotational motion of the reciprocating screw 501 is converted into the axial reciprocating movement of the moving plate 504, forming a periodic cleaning cycle, which effectively suppresses the problem of heat exchange efficiency decay caused by the accumulation of ash and dirt. Brushes can be embedded inside the sleeve 505. The brushes continuously clean the tube wall during the reciprocating movement, and the dust falls to the bottom of the cylinder 1.

[0049] like Figures 6-10 As shown, this embodiment discloses an implementation method for cleaning the accumulated ash and dirt inside the cylinder 1:

[0050] The opening of the drain pipe 103 faces downward. A branch pipe is provided on the drain pipe 103. An inverted U-shaped exhaust pipe 7 is connected to the branch pipe. A sealing component 8 is installed at the liquid inlet end of the inverted U-shaped exhaust pipe 7. An adjusting component 6 is installed inside the liquid outlet end of the drain pipe 103. The adjusting component 6 is located on the lower side of the branch pipe.

[0051] The adjusting component 6 can also be a valve from the prior art, or it can be the manually adjusted implementation method disclosed in this embodiment. The adjusting component 6 includes a valve plate 601, which is located inside the drain pipe 103. The valve plate 601 is mounted on a connecting shaft 602 passing through the drain pipe 103. A worm gear 603 is fixedly mounted at the end of the connecting shaft 602. The worm gear 603 meshes with a worm 604. At the same time, the worm 604 is mounted on a connecting plate 104 fixed on the outer surface of the drain pipe 103. A handle 605 is fixed at one end of the worm 604. When cleaning accumulated dirt, the handle 605 drives the worm 604 to rotate. The rotating worm 604 drives the worm gear 603 to rotate. The worm gear 603, the connecting shaft 602, and the valve plate 601 all rotate. Manually rotating the handle 605 rotates the valve plate 601 from a horizontal state to a vertical state, thereby opening the lower end of the drain pipe 103.

[0052] Cleaning water enters the interior of the cylinder 1 through the inlet pipe 301. The water flow washes the interior of the cylinder 1 and the surface of the heat exchange tube 4, thus rinsing off the sloughed-off scale. The scale mixes with the water and is discharged through the lower port of the drain pipe 302.

[0053] The sealing component 8 can be a valve from the prior art, or it can be the manually adjustable implementation method disclosed in this embodiment, such as... Figure 11 As shown, the sealing assembly 8 includes a mounting plate 801 installed inside the inverted U-shaped exhaust pipe 7. The mounting plate 801 has a drain hole in the middle, and a cover 804 fits inside the drain hole. The cover 804 is installed on the mounting plate 801 by an elastic connector, and the cover 804 rotates to the side away from the exhaust pipe 103.

[0054] The mounting plate 801 has an external thread, and the inlet of the inverted U-shaped exhaust pipe 7 has an internal thread. The mounting plate 801 is installed in the inlet of the inverted U-shaped exhaust pipe 7 through threaded engagement. At the same time, the cover 804 has a protrusion 805. The sealing component 8 can be rotated by pinching the protrusion 805 with your fingers.

[0055] The specific implementation of the elastic connector is as follows: a connecting seat 802 is provided on one side of the mounting plate 801. The elastic connector includes a second connecting rod 803. One end of the second connecting rod 803 is fixed to the end face of the cover 804. The other end of the second connecting rod 803 is connected to the connecting seat 802 through a pin. A torsion spring 806 is installed on the pin. One end of the torsion spring 806 abuts against the outer surface of the connecting seat 802, and the other end of the torsion spring 806 abuts against the outer surface of the second connecting rod 803.

[0056] The back of the cover 804 is provided with a stand. The connecting rod 803 is fixedly engaged with the stand by a pin. One end of the torsion spring 806 pushes the connecting rod 803 to drive the cover 804 to close the drain hole.

[0057] During heat exchange, the lower end of the drain pipe 103 is closed by rotating the handle 605 from the vertical to the horizontal position. As air enters the cylinder 1, the pressure inside the cylinder 1 gradually increases. When the pressure reaches 0.2~0.5 bar (20~50 kPa), the pressure pushes the connecting rod 803 to rotate against the preload of the torsion spring 806, so that the cover 804 is in the open position relative to the drain hole. The gas enters the inverted U-shaped exhaust pipe 7 through the sealing component 8 to achieve overpressure discharge.

[0058] The branch pipe and the sealing component 8 effectively reduce the amount of wastewater entering the inverted U-shaped exhaust pipe 7 after cleaning. At the same time, the lower end of the discharge pipe 103 is lower than the inverted U-shaped exhaust pipe 7, which facilitates the complete discharge of waste liquid.

[0059] During use, the regulating component 6 is closed, and the high-temperature exhaust gas containing carbon dioxide passes through the inlet pipe 101, through the cylinder 1, and is discharged through the inverted U-shaped exhaust pipe 7 connected to the branch pipe of the outlet pipe 103.

[0060] The heat exchange water passes through a set of heat exchange tubes 4, the second shell 11 and another set of heat exchange tubes 4 in sequence through the inlet pipe 301, and is discharged through the drain pipe 302.

[0061] During cleaning, the adjustment component 6 is opened, and the motor 506 drives the reciprocating screw 501 to rotate via the belt 508. The moving plate 504 and the tube sleeve 505 move back and forth on the reciprocating screw 501. The bristles of the tube sleeve 505 clean the outer wall of the heat exchange tube 4, and the cleaned dust falls into the inside of the cylinder 1.

[0062] Cleaning water passes through the inlet pipe 102 into the inside of the cylinder 1 and is discharged through the outlet pipe 103. The water flow cleans the floating dust inside the cylinder 1.

[0063] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A high-efficiency and energy-saving carbon dioxide capture device for electrolytic aluminum production, comprising a tank structure, the tank structure comprising a cylinder (1), a heat exchange structure located inside the cylinder (1), a first shell (3) and a second shell (11) respectively installed at both ends of the cylinder (1), the heat exchange structure comprising two baffles (2) and a plurality of heat exchange tubes (4), the plurality of heat exchange tubes (4) being installed between the two baffles (2), characterized in that: The cylinder (1) is equipped with a cleaning component (5); The cleaning assembly (5) includes a reciprocating screw (501) and a moving plate (504). The reciprocating screw (501) is installed between two baffles (2), and the moving plate (504) is installed on the reciprocating screw (501). Multiple sleeves (505) are provided on both sides of the moving plate (504) and are sleeved on the outside of the heat exchange tube (4). One end of the reciprocating screw (501) is connected to a connecting rod (502), and the end of the connecting rod (502) extending out of the second housing (11) is connected to a driven wheel (503).

2. The device for capturing carbon dioxide with high efficiency and energy saving in the process of producing aluminum by electrolysis according to claim 1, characterized in that: The device also includes a power input end, which includes a motor (506) and a drive wheel (507) connected to the output shaft of the motor (506). The driving pulley (507) and the driven pulley (503) are connected by a belt (508).

3. The device for capturing carbon dioxide with high efficiency and energy saving in the process of producing aluminum by electrolysis according to claim 1, characterized in that: The opening of the drain pipe (103) faces downwards; A branch pipe is provided on the drain pipe (103), and an inverted U-shaped exhaust pipe (7) is connected to the branch pipe. A sealing component (8) is installed at the liquid inlet end of the inverted U-shaped exhaust pipe (7). An adjustment component (6) is installed inside the outlet end of the drain pipe (103), and the adjustment component (6) is located on the lower side of the branch pipe.

4. The high-efficiency and energy-saving carbon dioxide capture device in the electrolytic aluminum production process according to claim 3, characterized in that: The regulating assembly (6) includes a valve plate (601) located inside the drain pipe (103) and mounted on a connecting shaft (602) passing through the drain pipe (103); A worm gear (603) is fixedly installed at the end of the connecting shaft (602). The worm gear (603) meshes with the worm (604). The worm (604) is installed on the connecting plate (104) fixed on the outer side of the discharge pipe (103). A handle (605) is fixed to one end of the worm (604).

5. The device for capturing carbon dioxide with high efficiency and energy saving in the process of producing aluminum by electrolysis according to claim 3, characterized in that: The enclosure assembly (8) includes a mounting plate (801) installed inside the inverted U-shaped exhaust pipe (7); The mounting plate (801) has a drain hole in the middle, and a cover (804) fits inside the drain hole. The cover (804) is mounted on the mounting plate (801) via an elastic connector, and the cover (804) rotates to the side away from the drain pipe (103).

6. The device for capturing carbon dioxide with high efficiency and energy saving in the process of producing aluminum by electrolysis according to claim 5, characterized in that: A connecting seat (802) is provided on one side of the mounting plate (801); The elastic connector includes a second connecting rod (803), one end of which is fixed to the end face of the cover (804), and the other end of which is connected to the connecting seat (802) via a pin. A torsion spring (806) is fitted on the pin.

7. The device for capturing carbon dioxide with high efficiency and energy saving in the process of producing aluminum by electrolysis according to claim 1, characterized in that: Both sides of the baffle (2) are provided with convex rings (202), and sealing rings (10) are installed on the outer surface of the two convex rings (202). The end face of the cylinder (1) and the end face of the shell (3) are provided with sealing grooves, and the two sealing rings (10) are respectively interference-fitted into the corresponding sealing grooves.

8. The device for capturing carbon dioxide with high efficiency and energy saving in the process of producing aluminum by electrolysis according to claim 1, characterized in that: Two baffles (2) are installed at the connection between the cylinder (1) and the first shell (3) and the connection between the cylinder (1) and the second shell (11), respectively. The baffles (2) have through holes, and the two ends of the heat exchange tube (4) are located in the through holes on the two baffles (2).

9. A high-efficiency and energy-saving carbon dioxide capture device for electrolytic aluminum production according to claim 8, characterized in that: A partition plate (201) is installed between a baffle (2) and the first housing (3), and the partition plate (201) divides the through hole on the baffle (2) into upper and lower parts.

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