A carbon dioxide recovery device

Abstract

The application relates to the technical field of carbon dioxide recovery, and discloses a carbon dioxide recovery device which comprises a shell and a pipe body, the pipe body comprises a support and a separation membrane arranged at a hollow part of the support; one end of the shell is provided with an air inlet, the other end is provided with an air outlet, one end of the pipe body is provided with a gas collecting port, a plurality of sliding plates are slidably arranged on the side wall of the pipe body, the sliding plates are arranged at intervals along the length direction of the pipe body, elastic connecting pieces are arranged between adjacent sliding plates, and the distance between adjacent sliding plates decreases from the air inlet to the air outlet; one end of the shell close to the air inlet is provided with a driving piece, the driving piece is used for driving the sliding plates to slide, so that the distance between adjacent sliding plates becomes smaller. The application can improve the separation effect of carbon dioxide.

Description

Technical Field

[0001] This application relates to the technical field of carbon dioxide recovery, and in particular to a carbon dioxide recovery device. Background Technology

[0002] The basic principle of methanol steam reforming for hydrogen production is as follows: Methanol and water are mixed in a specific ratio, then vaporized and superheated. Under certain temperature, pressure, and flow conditions, a catalyst is used to induce a methanol reforming reaction and a carbon monoxide shift reaction, producing a mixture primarily composed of hydrogen and carbon dioxide. After pretreatment such as cooling and washing, the resulting mixture is then purified using a pressure swing adsorption (PSA) system to obtain high-purity hydrogen.

[0003] The main components of PSA tail gas include hydrogen (H2), carbon dioxide (CO2), carbon monoxide (CO), and trace amounts of methane. Currently, the mainstream method for handling PSA tail gas in methanol-to-hydrogen plants is to feed it entirely into a boiler or thermal oil heater for combustion. This is because the tail gas contains a certain proportion of combustible components such as hydrogen and carbon monoxide, which have a certain calorific value. Combustion can recover some heat energy to maintain the heating requirements of the reforming reaction.

[0004] Carbon dioxide in PSA exhaust is an inert gas and does not participate in the combustion reaction. The hydrogen and carbon monoxide in the exhaust burn to produce water and carbon dioxide, and both the original carbon dioxide and the newly generated carbon dioxide are directly emitted into the atmosphere along with the combustion flue gas. This means that carbon dioxide resources that could be recycled are wasted, while simultaneously increasing direct greenhouse gas emissions.

[0005] Therefore, more and more people are researching the purification of carbon dioxide. Membrane separation devices are the main equipment used for carbon dioxide purification. A membrane separation device mainly consists of a shell and a tube installed within the shell. The sidewall of the tube is a separation membrane capable of adsorbing carbon dioxide, which can be selected from organic polymer membranes such as cellulose acetate, polysulfone, and polyimide, or inorganic membranes such as zeolite molecular sieve membranes, ceramic membranes, and carbon membranes. When the exhaust gas is sent into the shell, due to the difference in the permeation rate of the separation membrane for the gas, carbon dioxide can pass through the separation membrane into the tube and exit from one end of the tube, while the remaining gas enters the shell and exits from the other end. In current membrane separation devices, where the exhaust gas is sent into the shell, the separation efficiency of carbon dioxide is not high due to pressure drop and other factors, indicating room for improvement. Summary of the Invention

[0006] This application provides a carbon dioxide recovery device.

[0007] The technical solution adopted in this application is as follows: A carbon dioxide recovery device includes a housing and a tube. The tube includes a support and a separation membrane disposed at a perforation in the support. One end of the housing has an air inlet, and the other end has an air outlet. One end of the tube has a gas collecting port. Multiple sliding plates are slidably disposed on the sidewall of the tube, spaced apart along the length of the tube. Adjacent sliding plates are connected by elastic connectors, and the distance between adjacent sliding plates decreases from the air inlet to the air outlet. A driving member is disposed at the end of the housing near the air inlet, driving the sliding plates to slide, thereby reducing the distance between adjacent sliding plates. Each sliding plate has a through hole, and an opening / closing member is disposed within the sliding plate. When all the sliding plates move towards the gas collecting port, the opening / closing member closes the through hole; when the sliding plates slide back to their original position away from the gas collecting port, the opening / closing member opens the through hole.

[0008] By adopting the above technical solution, the sliding plate divides the space inside the shell into multiple parts. When the sliding plate moves towards the gas collection port, the distance between the sliding plates becomes smaller. At this time, the through hole is in a closed state, which can compress the gas and allow carbon dioxide to be better driven to enter the tube through the separation membrane. When the sliding plate is reset, the through hole is in an open state, which allows the gas to fill each space smoothly, further replenishing the gas source and maintaining the pressure.

[0009] Optionally, the sliding plate has an installation groove, and the opening and closing component includes an opening and closing plate slidably disposed in the installation groove, the opening and closing plate sliding along the radial direction of the pipe body; the opening and closing plate has an opening, when the sliding plate slides towards the air collection port, the opening and the through hole are offset; when the sliding plate slides away from the air collection port and resets, the opening and the through hole coincide.

[0010] By adopting the above technical solution, when the opening and the through hole coincide, the space between the sliding plates is in a connected state. After the opening and closing plates slide, the opening and the through hole are staggered, that is, in a closed state.

[0011] Optionally, an elastic element is provided between the opening / closing plate and the mounting groove. When the opening and the through hole coincide, the elastic element is in a compressed state. The side wall of the pipe body has slots, the number of which corresponds one-to-one with the sliding plate, and the length of each slot decreases towards the air collection port. Inclined surfaces are provided at both ends of the bottom surface of the slot. When the sliding plate moves in the opposite direction to the air collection port, and the opening / closing plate moves to the slot, the elastic element drives the lower end of the opening / closing plate to insert into the slot, causing the through hole and the opening to be misaligned. The plate is provided with a positioning element, and the side wall of the tube is provided with a trigger seat. When the sliding plate passes through the slot and continues to slide, the opening and closing plate slides upward so that the opening and the through hole coincide. The trigger seat can drive the positioning element to position the opening and closing plate, so that when the sliding plate slides away from the air collection port to reset, the opening and the through hole can be kept aligned. The tube is provided with an unlocking seat at the position of the slot away from the air collection port. After the sliding plate is reset, the positioning effect of the positioning element on the opening and closing plate can be released through the unlocking seat.

[0012] By adopting the above technical solution, when the sliding plate slides and corresponds to the slot position, the elastic element drives the lower end of the opening and closing plate to slide downward and abut against the slot. At this time, the opening and the through hole are misaligned. When the sliding plate continues to slide, under the action of the inclined surface, the opening and closing plate is pushed back into the mounting slot, and the opening and the through hole coincide. Under the action of the positioning element, the opening and the through hole are still in the overlapping state when the sliding plate is reset.

[0013] Optionally, the sliding plate has a receiving cavity, the positioning member is located in the receiving cavity, the side wall of the opening and closing plate is provided with an extension rod, the inner wall of the mounting groove is provided with a clearance groove, the extension rod passes through the clearance groove and extends into the receiving cavity; the positioning member includes a positioning rod, the positioning rod is bent, and the upper end of the positioning rod has an abutment surface; both ends of the positioning rod slide through the surface of the sliding plate, when the sliding plate abuts against the trigger seat, one end of the positioning rod abuts against the trigger seat, and the abutment surface abuts against the lower surface of the extension rod; when the sliding plate resets and slides and abuts against the unlocking seat, the unlocking seat pushes the positioning rod to slide, and the abutment surface and the extension rod are misaligned.

[0014] By adopting the above technical solution, when the sliding plate is reset, the abutting surface of the positioning rod abuts against the extension rod, thereby preventing the opening and closing plate from moving downwards and maintaining the overlap of the opening and through holes; and under the action of the unlocking seat, the positioning rod and the extension rod are misaligned, so that the opening and closing plate will not be affected when it slides down next time.

[0015] Optionally, the elastic connector includes a sliding rod disposed on one of the sliding plates, a sleeve disposed on the other sliding plate, and an elastic compression member disposed in the sleeve. The sliding rod is slidably inserted into the sleeve, and the elastic compression member is connected between the sliding rod and the inner end face of the sleeve. The elastic connector closest to the gas collecting port is connected between the sliding plate and the inner end face of the pipe.

[0016] By adopting the above technical solution, the sliding rod, sleeve and elastic compression component can be used to push one of the sliding plates to move, thereby driving all the sliding plates to move synchronously.

[0017] Optionally, the outer wall of the sliding rod is provided with a guide block, and the inner wall of the sleeve is provided with a guide groove. When the sliding plate is reset, the guide block can abut against the end face of the guide groove and pull the sliding plate to slide.

[0018] By adopting the above technical solution, the sliding rod slides more stably, and it is easier to reset all the sliding plates during reset.

[0019] Optionally, a partition is provided at one end of the housing away from the air collection port, one end of the tube is connected to the partition, the side of the partition away from the tube forms an air intake chamber, the air intake port is located on the side wall of the air intake chamber, and the partition has a vent hole to allow the air intake chamber to communicate with the inner wall cavity of the housing; the driving member includes a driving rod that slides through the partition and is connected to the sliding plate near the air intake chamber therein, and a driving element disposed on the outer wall of the housing for driving the driving rod to move.

[0020] By adopting the above technical solution, the sliding plate can be moved by driving the driving rod through the driving element.

[0021] Optionally, a plurality of vent holes are evenly distributed on the partition plate.

[0022] By adopting the above technical solution, gas can enter the inner cavity of the shell more evenly.

[0023] Optionally, two elastic connectors are provided between adjacent sliding plates.

[0024] By adopting the above technical solution, the stability of the connection between the sliding plates is improved.

[0025] In summary, this application includes at least one of the following beneficial effects: 1. By using a membrane separation device to treat exhaust gas, high-purity carbon dioxide gas can be obtained, which is beneficial for resource recycling. In the membrane separation device, the distance between the sliding plates is compressed by driving the sliding plates to improve the separation effect of carbon dioxide, thereby overcoming the pressure drop and other problems existing in the existing separation devices.

[0026] 2. By using a membrane separation device, the device has a compact structure and relies on the movement of a drive rod, making it highly adaptable to different gas concentrations and flow rates. It has a fast start-up speed, simple operation, and a high degree of automation, making it flexible to adapt to different working scenarios and space-constrained occasions. It can also accurately adapt to the transformation and upgrading of existing equipment, which is very beneficial for practical applications. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of an embodiment of this application; Figure 2 This is a cross-sectional schematic diagram of an embodiment of this application; Figure 3 This is a schematic diagram of the internal structure in an embodiment of this application; Figure 4 This is an exploded view of the elastic connector in the embodiments of this application; Figure 5 This is a schematic diagram illustrating the opening and closing plate in an embodiment of this application; Figure 6 This is a schematic diagram illustrating the positioning rod in an embodiment of this application.

[0028] Explanation of reference numerals in the attached drawings: 1. Shell; 2. Tube; 3. Air inlet; 4. Air outlet; 5. Air collection port; 6. Sliding plate; 7. Driving component; 71. Driving rod; 72. Driving element; 8. Elastic connector; 81. Sliding rod; 82. Sleeve; 83. Elastic compression component; 9. Through hole; 10. Opening and closing component; 101. Opening and closing plate; 11. Mounting groove; 12. Opening; 13. Elastic component; 14. Slot; 15. Inclined surface; 16. Positioning component; 161. Positioning rod; 17. Trigger seat; 18. Unlocking seat; 19. Receiving cavity; 20. Extension rod; 21. Relief groove; 22. Guide block; 23. Guide groove; 24. Partition; 25. Air inlet cavity; 26. Vent hole. Detailed Implementation

[0029] The present application will be further described in detail below with reference to the accompanying drawings.

[0030] This application discloses a carbon dioxide recovery device. (Refer to...) Figure 1 and Figure 2The carbon dioxide recovery device includes a housing 1 and a tube 2 disposed inside the housing 1. One end of the housing 1 has an inlet 3, and the other end has an outlet 4. The inlet 3 is used to introduce exhaust gas into the housing 1, and the outlet 4 is used to discharge the remaining gas after separation from the housing 1. The outlet 4 can be filled with materials such as gravel or activated carbon to control the gas output and better maintain the pressure inside the housing. The tube 2 is disposed along the axis of the housing 1 within the inner cavity of the housing 1, with a certain space between the tube 2 and the inner wall of the housing 1. One end of the tube 2 is closed, and the other end has a gas collecting port 5, which extends from the end of the housing 1 to collect carbon dioxide gas that has permeated through the separation membrane. The gas collecting port 5 can be connected to a subsequent carbon dioxide compression liquefaction and filling system.

[0031] Reference Figure 2 The tube body 2 includes a support and a separation membrane disposed in the perforations of the support. The support is a cylindrical frame structure with multiple perforated areas on its sidewalls, which are evenly distributed along the circumference and length of the tube body 2. The separation membrane is fixedly installed in the perforations of the support, covering the entire sidewall surface of the tube body 2. The separation membrane can be made of a membrane material that selectively permeates carbon dioxide, such as cellulose acetate membrane, polyimide membrane, polysulfone membrane, zeolite molecular sieve membrane, or carbon membrane. The separation membrane selectively permeates carbon dioxide, thereby achieving selective separation of carbon dioxide.

[0032] Reference Figure 2 and Figure 3 Multiple sliding plates 6 are slidably arranged on the sidewall of the pipe body 2, and a driving component 7 for driving the sliding plates 6 to slide is provided at the end of the housing 1 near the air inlet 3. The sliding plate 6 is a circular plate structure, with its inner ring surface slidingly engaged with the outer wall of the pipe body 2, and its outer wall abutting against the inner wall of the housing 1. The sliding plate 6 can slide back and forth along the length of the pipe body 2. The sliding plates 6 are spaced apart along the length of the pipe body 2, arranged sequentially from the end near the air inlet 3 to the end near the air outlet 4. The multiple sliding plates 6 divide the inner cavity of the housing 1 into multiple independent separation chambers arranged in the axial direction. An elastic connector 8 is provided between adjacent sliding plates 6 to connect the sliding plates 6 into an integral linkage structure. From the air inlet 3 to the air outlet 4, the distance between adjacent sliding plates 6 gradually decreases, that is, the distance between the sliding plates 6 on the side near the air inlet 3 is larger, and the distance between the sliding plates 6 on the side near the air outlet 4 is smaller. In this embodiment, three sliding plates 6 are provided, dividing the space inside the housing 1 into four. For ease of explanation, the direction from the air inlet 3 to the air outlet 4 is used to name the sliding plates 6 as the first sliding plate, the second sliding plate, and the third sliding plate.

[0033] Reference Figure 3 and Figure 4The elastic connector 8 includes a sliding rod 81, a sleeve 82, and an elastic compression member 83. The sliding rod 81 is fixedly disposed on the surface of one of the sliding plates 6 and extends along the axial direction of the tube body 2. The overall length of the elastic connector 8 is adapted to the distance between the sliding plates 6. The sleeve 82 is fixedly disposed on the surface of the adjacent sliding plate 6, with its opening facing the sliding rod 81. The sliding rod 81 is slidably inserted into the inner cavity of the sleeve 82, and can reciprocate axially within the sleeve 82. The elastic compression member 83 is a spring, disposed within the inner cavity of the sleeve 82, with one end fixedly connected to the end of the sliding rod 81 and the other end fixed between the inner end faces of the sleeve 82.

[0034] When two adjacent sliding plates 6 approach each other, the sliding rod 81 is further inserted into the sleeve 82, and the elastic compression member 83 is compressed. The elastic connector 8 closest to the air collecting port 5 is connected between the sliding plate 6 and the inner end face of the pipe body 2. That is, the sliding rod 81, sleeve 82 and elastic compression member 83 are also provided between the sliding plate 6 and the inner wall of the end of the pipe body 2, to ensure that all sliding plates 6 can return to their initial position.

[0035] Two elastic connectors 8 are provided between adjacent sliding plates 6. The two elastic connectors 8 are symmetrically arranged along the circumference of the sliding plates 6, so that the sliding plates 6 are subjected to uniform force during sliding and avoid skewing and jamming. Furthermore, a guide block 22 is fixedly provided on the outer wall of the sliding rod 81, and a guide groove 23 is correspondingly opened on the inner wall of the sleeve 82. The guide block 22 is slidably disposed in the guide groove 23 to guide the sliding of the sliding rod 81. When the sliding plates 6 are reset, the guide block 22 can abut against the end face of the guide groove 23, thereby pulling the sliding plates 6 to reset synchronously, ensuring that each sliding plate 6 returns to the initial spacing distribution.

[0036] Reference Figure 2 and Figure 5 Each sliding plate 6 has a through hole 9, which extends through the sliding plate 6 along its thickness. Each sliding plate 6 also has an opening / closing element 10 for opening or closing the through hole 9 at a specific stage. Multiple through holes 9 are evenly distributed around the sliding plate 6. This embodiment uses two through holes 9 as an example for explanation.

[0037] Reference Figure 5 and Figure 6The sliding plate 6 has a mounting groove 11 extending radially from the inner ring surface to the outer ring surface of the sliding plate 6. The opening / closing member 10 includes an opening / closing plate 101, which is slidably disposed in the mounting groove 11 and can reciprocate radially along the sliding plate 6. The opening / closing plate 101 has an opening 12, the position of which corresponds to the through hole 9 on the sliding plate 6. When the opening / closing plate 101 slides to a position where the opening 12 coincides with the through hole 9, the spaces on both sides of the sliding plate 6 are connected through the through hole 9 and the opening 12, allowing gas to pass freely. When the opening / closing plate 101 slides to a position where the opening 12 is offset from the through hole 9, the through hole 9 is closed by the opening / closing plate 101, isolating the spaces on both sides of the sliding plate 6.

[0038] An elastic element 13, which is a spring, is provided between the opening / closing plate 101 and the inner wall of the mounting groove 11. The elastic element 13 is installed between the inner end face of the mounting groove 11 and the end of the opening / closing plate 101 away from the tube body 2, and can apply a force to the opening / closing plate 101 that abuts against the surface of the tube body 2. The end of the opening / closing plate 101 near the tube body 2 is a columnar structure, and it slides through the inner annular surface of the sliding plate 6 and abuts against the surface of the tube body 2.

[0039] Reference Figure 3 and Figure 5 The sidewall of the pipe body 2 is provided with slots 14, the number of which corresponds one-to-one with the number of sliding plates 6. Each slot 14 extends along the axial direction of the pipe body 2, and the axial length of each slot 14 gradually decreases from the side closer to the air inlet 3 to the side closer to the air collecting port 5. That is to say, the slot 14 corresponding to the sliding plate 6 near the air inlet 3 is the longest, and the slot 14 corresponding to the sliding plate 6 near the air collecting port 5 is the shortest. Inclined surfaces 15 are provided at both ends of the bottom surface of the slot 14, and the inclined surfaces 15 at both ends extend obliquely from the bottom surface of the slot 14 towards the slot opening.

[0040] As the sliding plate 6 moves towards the gas collecting port 5, when the lower end of the opening / closing plate 101 reaches the slot 14 position, the elastic element 13 drives the opening / closing plate 101 to slide radially, causing the lower end of the opening / closing plate 101 to insert into the slot 14 and abut against the inner wall of the slot 14. At this time, the opening 12 is offset from the through hole 9, and the through hole 9 is closed. The sliding plate 6 continues to move towards the gas collecting port 5, thereby compressing the space between the sliding plates 6, as well as the space between the last sliding plate 6 and the inner end face of the housing 1, so that the carbon dioxide in this space can better pass through the separation membrane.

[0041] As the sliding plate 6 continues to slide toward the air collection port 5, the lower end of the opening and closing plate 101, guided by the inclined surface 15 of the bottom surface of the slot 14, gradually slides out of the slot 14 and is pushed back into the mounting slot 11, and the opening 12 and the through hole 9 re-overlap.

[0042] with reference to Figure 5 and Figure 6 , the sliding plate 6 is further provided with a positioning member 16, which is used to hold the opening-closing plate 101 at the position where the through hole 9 and the opening 12 overlap after the opening-closing plate 101 exits the slot 14. When the sliding plate 6 slides and resets in the direction away from the gas collection port 5, the space between the sliding plates 6 is in a communicated state, so that the gas can be introduced more quickly to supplement the gas source.

[0043] Specifically, the sliding plate 6 is provided with an accommodating cavity 19, the accommodating cavity 19 is located on one side of the mounting groove 11, the inner wall of the mounting groove 11 is provided with an escape groove 21, and the escape groove 21 is in communication with the mounting groove 11. The side wall of the opening-closing plate 101 is fixedly provided with an extension rod 20, and the extension rod 20 passes through the escape groove 21 and extends into the accommodating cavity 19.

[0044] The positioning member 16 comprises a positioning rod 161, the positioning rod 161 is a bent rod member, and is overall in a shape of the Chinese character "几". Both ends of the positioning rod 161 vertically penetrate out from the surface of the sliding plate 6. The middle part of the positioning rod 161 is located in the accommodating cavity 19, and the upper end of the positioning rod 161 has an abutting surface. The side wall of the pipe body 2 is provided with a trigger seat 17 on the side of the slot 14 close to the gas collection port 5. During the movement of the sliding plate 6 toward the gas collection port 5, the abutting surface is staggered from the extension rod 20, so that the positioning rod 161 does not affect the sliding of the opening-closing plate 101. After the sliding plate 6 is separated from the slot 14, the opening-closing plate 101 resets to the position where the opening 12 and the through hole 9 overlap, the sliding plate 6 continues to slide for a certain distance, one end of the positioning rod 161 abuts against the trigger seat 17, so that the positioning rod 161 can slide horizontally in the accommodating cavity 19, and the abutting surface is located below the extension rod 20 and abuts against the extension rod 20, so that in the process of the sliding plate 6 sliding back to reset, the opening-closing plate 101 can no longer slide downward.

[0045] in conjunction with Figure 3 and Figure 6 , the side wall of the pipe body 2 is provided with an unlocking seat 18 on the side of the slot 14 close to the gas inlet 3. After the sliding plate 6 is reset, the positioning rod 161 can abut against the unlocking seat 18 and drive the positioning rod 161 to slide horizontally, so that the abutting surface is staggered from the extension rod 20, and thus the positioning rod 161 no longer affects the next movement of the opening-closing plate 101.

[0046] with reference to, 2 and Figure 3A baffle 24 is provided at one end of the housing 1 near the air inlet 3, dividing the end of the housing 1 into an independent air inlet chamber 25. One end of the pipe 2 is fixedly connected to the center of the baffle 24, and the side of the baffle 24 away from the pipe 2 forms the air inlet chamber 25. The air inlet 3 is provided on the side wall of the air inlet chamber 25 to deliver exhaust gas into the air inlet chamber 25. Multiple vent holes 26 are evenly distributed on the baffle 24, and the vent holes 26 are evenly distributed along the circumference of the baffle 24. The gas in the air inlet chamber 25 enters the inner cavity of the housing 1 evenly through the vent holes 26, realizing uniform gas distribution and avoiding gas concentration impacting a certain local area.

[0047] Reference Figure 2 The drive unit 7 includes a drive rod 71 and a drive element 72. One end of the drive rod 71 is fixedly connected to the sliding plate 6 near the intake chamber 25. The other end of the drive rod 71 slides through the partition 24 and is located in the intake chamber 25, and is connected to the drive element 72. The drive element 72 is a cylinder, hydraulic cylinder, or electric push rod, mounted on the outer wall of the housing 1, and its piston rod is connected to the drive rod 71. To maintain stability, two drive rods 71 ​​are symmetrically arranged on the sliding plate 6 and connected to the piston rod of the drive element 72.

[0048] In a further embodiment, refer to Figure 3 The inclination of the inclined surface 15 at the end of each slot 14 closest to the air collecting port 5 is different. Specifically, the slot 14 closest to the air collecting port 5 has the largest inclination of its inclined surface 15 at the end closest to the air collecting port 5, and the slot 14 furthest from the air collecting port 5 has the smallest inclination of its inclined surface 15 at the end closest to the air collecting port 5. When the sliding plate 6 moves towards the air collecting port 5, the third sliding plate 6 moves to the end of the slot 14. Due to the largest inclination of its inclined surface 15, it experiences greater resistance and will not continue to move. However, the first and second sliding plates 6 continue to slide, so the third sliding plate 6 remains in a closed state. Then, after the first and second sliding plates 6 have moved a certain distance, they push the third sliding plate 6 to move and abut against the adjacent trigger seat 17. Then, the second and first sliding plates 6 abut against their respective trigger seats 17 in sequence.

[0049] During the sliding back process, the sliding rod 81 slides in the sleeve 82, the guide block 22 can slide in the guide groove 23, and the sliding rod 81 on the third sliding plate 6 first slides to the maximum distance in the sleeve 82, that is, the guide block 22 with the sliding rod 81 can abut against the end face of the guide groove 23, so that the third sliding plate 6 abuts against the unlocking seat 18 first, then the second sliding plate 6 abuts against the corresponding unlocking seat 18 in sequence, and finally the first sliding plate 6 abuts against the unlocking seat 18.

[0050] The implementation principle of a carbon dioxide recovery device according to an embodiment of this application is as follows: exhaust gas continuously enters the housing 1 through the air inlet 3. The driving component 7 intermittently drives the sliding plate 6 to move. When the sliding plate 6 moves towards the air collection port 5, each sliding plate 6 can slide, and the third sliding plate 6 slides to the maximum displacement first, followed by the second sliding plate 6 and the first sliding plate 6 sliding to the maximum displacement in sequence. Then the driving component 7 drives the sliding plate 6 to reset, and the elastic connecting component 8 synchronously drives the sliding plate 6 to slide. During the reset process, the through hole 9 is in the open state. The third sliding plate 6 resets first, followed by the second sliding plate 6 and the first sliding plate 6 resetting in sequence.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A carbon dioxide recovery device, comprising a shell (1) and a tube (2), the tube (2) comprising a support and a separation membrane disposed at a perforated portion of the support; one end of the shell (1) is provided with an air inlet (3) and the other end with an air outlet (4), and one end of the tube (2) is provided with an air collection port (5), characterized in that: The tube body (2) has multiple sliding plates (6) slidably arranged on its side wall. The sliding plates (6) are spaced apart along the length of the tube body (2). An elastic connector (8) is provided between adjacent sliding plates (6). The distance between adjacent sliding plates (6) decreases from the air inlet (3) to the air outlet (4). A driving member (7) is provided at one end of the shell (1) near the air inlet (3). The driving member (7) is used to drive the sliding plates (6) to slide, so that the distance between adjacent sliding plates (6) becomes smaller. Each sliding plate (6) has a through hole (9). An opening and closing member (10) is provided in the sliding plate (6). When all the sliding plates (6) move towards the air collection port (5), the opening and closing member (10) closes the through hole (9). When the sliding plate (6) slides back to its original position away from the air collection port (5), the opening and closing member (10) opens the through hole (9).

2. The carbon dioxide recovery device according to claim 1, characterized in that: The sliding plate (6) has an installation groove (11), and the opening and closing component (10) includes an opening and closing plate (101) slidably disposed in the installation groove (11). The opening and closing plate (101) slides along the radial direction of the pipe body (2). The opening and closing plate (101) has an opening (12). When the sliding plate (6) slides towards the air collection port (5), the opening (12) and the through hole (9) are offset. When the sliding plate (6) slides away from the air collection port (5) and resets, the opening (12) and the through hole (9) coincide.

3. The carbon dioxide recovery device according to claim 2, characterized in that: An elastic element (13) is provided between the opening / closing plate (101) and the mounting groove (11). When the opening (12) and the through hole (9) coincide, the elastic element (13) is in a compressed state. The side wall of the tube body (2) is provided with a slot (14). The number of slots (14) corresponds one-to-one with the sliding plate (6), and the length of each slot (14) decreases towards the air collection port (5). Inclined surfaces (15) are provided at both ends of the bottom surface of the slot (14). When the sliding plate (6) moves in the opposite direction to the air collection port (5), when the opening / closing plate (101) moves to the slot (14), the elastic element (13) drives the lower end of the opening / closing plate (101) to insert into the slot (14), so that the through hole (9) and the opening (12) are staggered. 6) A positioning element (16) is provided on the tube body (2), and a trigger seat (17) is provided on the side wall of the tube body (2). When the sliding plate (6) passes through the slot (14) and continues to slide, the opening and closing plate (101) slides upward so that the opening (12) and the through hole (9) coincide. The trigger seat (17) can drive the positioning element (16) to position the opening and closing plate (101) so that when the sliding plate (6) slides and resets away from the air collection port (5), the opening (12) and the through hole (9) can be kept in sync. The tube body (2) is provided with an unlocking seat (18) at the position of the slot (14) away from the air collection port (5). After the sliding plate (6) is reset, the positioning effect of the positioning element (16) on the opening and closing plate (101) can be released by the unlocking seat (18).

4. A carbon dioxide recovery device according to claim 3, characterized in that: The sliding plate (6) has a receiving cavity (19), the positioning member (16) is located in the receiving cavity (19), the side wall of the opening and closing plate (101) is provided with an extension rod (20), the inner wall of the mounting groove (11) is provided with a relief groove (21), the extension rod (20) passes through the relief groove (21) and extends into the receiving cavity (19); the positioning member (16) includes a positioning rod (161), the positioning rod (161) is bent, and the upper end of the positioning rod (161) has an abutment surface. The two ends of the positioning rod (161) slide through the surface of the sliding plate (6). When the sliding plate (6) abuts against the trigger seat (17), one end of the positioning rod (161) abuts against the trigger seat (17), and the abutting surface abuts against the lower surface of the extension rod (20). When the sliding plate (6) returns to its original position and abuts against the unlocking seat (18), the unlocking seat (18) pushes the positioning rod (161) to slide, and the abutting surface and the extension rod (20) are misaligned.

5. A carbon dioxide recovery device according to claim 4, characterized in that: The elastic connector (8) includes a sliding rod (81) disposed on one of the sliding plates (6), a sleeve (82) disposed on the other sliding plate (6), and an elastic compression member (83) disposed in the sleeve (82). The sliding rod (81) is slidably inserted into the sleeve (82), and the elastic compression member (83) is connected between the sliding rod (81) and the inner end face of the sleeve (82). The elastic connector (8) closest to the air collection port (5) is connected between the sliding plate (6) and the inner end face of the pipe body (2).

6. A carbon dioxide recovery device according to claim 5, characterized in that: The outer wall of the sliding rod (81) is provided with a guide block (22), and the inner wall of the sleeve (82) is provided with a guide groove (23). When the sliding plate (6) is reset, the guide block (22) can abut against the end face of the guide groove (23) and pull the sliding plate (6) to slide.

7. A carbon dioxide recovery device according to claim 5, characterized in that: The housing (1) has a partition (24) at one end away from the air collection port (5), and one end of the tube (2) is connected to the partition (24). The side of the partition (24) away from the tube (2) forms an air intake chamber (25). The air inlet (3) is located on the side wall of the air intake chamber (25). The partition (24) has a vent hole (26) so that the air intake chamber (25) and the inner wall cavity of the housing (1) are connected. The driving member (7) includes a driving rod (71) that slides through the partition (24) and is connected to the sliding plate (6) that is close to the air intake chamber (25), and a driving element (72) that is disposed on the outer wall of the housing (1) and used to drive the driving rod (71) to move.

8. A carbon dioxide recovery device according to claim 7, characterized in that: The ventilation holes (26) are evenly distributed on the partition plate (24).

9. A carbon dioxide recovery device according to claim 5, characterized in that: Two elastic connectors (8) are provided between adjacent sliding plates (6).

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