Carbon dioxide recovery system

Abstract

The invention relates to a carbon dioxide recovery system. The gas purifying tank is additionally arranged in the gas inlet pipeline for absorbing carbon dioxide, so that particle impurities in the gas can be filtered, the cleanness of the gas is ensured, the influence on other equipment in the post-treatment process is avoided, and the faults of the equipment and the frequency of cleaning and maintenance are reduced. The designed absorption tower and the regeneration tower both adopt motors as power sources, the motor in the absorption tower drives an absorption liquid distribution plate group to rotate, and the absorption liquid can be dispersed, flatly laid and flow by utilizing the interaction of a flow stirring plate, a flow guide plate and a flow distribution plate, and is in full contact with relatively circulating gas, so that the absorption efficiency is improved. And the regeneration tower drives the multi-stage flow guide frame to rotate through the motor, so that the flowing absorption liquid can be tiled and dispersed, and the carbon dioxide in the absorption liquid can be conveniently removed. The whole system equipment is optimized, the use of parts such as a water pump and a spray head is reduced, and the fault rate and the maintenance rate can be effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon dioxide recovery, and in particular to a carbon dioxide recovery system. Background Art

[0002] In industrial production, carbon dioxide has important industrial value and is an important chemical raw material. As people's environmental awareness continues to increase, the recovery and conversion process of carbon dioxide products has received more and more attention. Therefore, the recycling and utilization of carbon dioxide is very necessary.

[0003] At present, the commonly used methods for carbon dioxide recovery are mainly divided into physical adsorption, chemical absorption, membrane absorption, etc. These traditional methods all have certain limitations. Traditional adsorption materials such as activated carbon and zeolite are mainly physical adsorption, and the cost of adsorption materials is low, but the carbon dioxide selectivity is poor, the reaction rate is slow, and the adsorption capacity is small. The development bottleneck of solvent absorption technology for capturing carbon dioxide is that the system investment cost is high, and the solvent and gas need to be fully in contact to ensure the absorption effect. The equipment used in the prior art mostly uses spraying liquid to expand the contact area with the gas. The entire system equipment is relatively complex, with more power sources and vulnerable parts, and the subsequent maintenance cost is high. In addition to being difficult to cope with complex working conditions, the membrane absorption method also has problems such as high cost of thin film materials, low permeability when selectivity is high, and poor selectivity when permeability is high. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention discloses a carbon dioxide recovery system, and the technical solution adopted is that the whole system includes an absorption tower, a clean gas tank, a first water pump, a heat exchanger, a regeneration tower, a second water pump, a gas storage tank and an absorption liquid heating device, the bottom of the side of the absorption tower is connected to the absorption tower air inlet pipe, the top of the absorption tower is connected to the absorption tower exhaust pipe and the absorption tower liquid inlet pipe respectively, a first motor is installed at the center of the top of the absorption tower, the rotating shaft of the first motor vertically extends into the inner cavity of the absorption tower, and an absorption diverter plate group is evenly arranged at equal intervals along the rotating shaft direction, and the absorption diverter plate group is evenly arranged at equal intervals along the rotating shaft direction. The plate group includes a diverter plate, a guide plate and a splitter plate, the diverter plate is fixedly connected to the rotating shaft of the first motor, the guide plate is fitted below the diverter plate, the guide plate is fixedly connected to the inner wall of the absorption tower, the splitter plate is fixedly connected to the rotating shaft of the first motor below the guide plate, a first flow equalizing trough is fixedly connected to the top of the inner cavity of the absorption tower, the upper opening of the first flow equalizing trough corresponds to the liquid inlet pipe of the absorption tower, and the lower part corresponds to the diverter plate, the rotating shaft of the first motor rotates through the center of the first flow equalizing trough, and the bottom of the absorption tower is connected to the liquid outlet pipe of the absorption tower. The absorption liquid enters the inner cavity of the absorption tower from the absorption tower inlet pipe, falls into the first equalizing trough and then is evenly sprinkled onto the diverter plate below. The first motor drives the diverter plate and the diverter plate to rotate, so that the absorption liquid falling on the diverter plate is driven to sprinkle around, and falls on the guide plate to flow toward the center, and finally passes through the diverter plate and falls on the absorption diverter plate group of the next level. The gas to be absorbed enters the absorption tower from the absorption tower inlet pipe and flows upward. When passing through the absorption diverter plate group, it is fully in contact with the absorption liquid, so that the absorption liquid absorbs the carbon dioxide therein; the absorption tower inlet pipe is connected to the clean gas tank outlet pipe on the clean gas tank, the top of the clean gas tank is connected to the clean gas tank inlet pipe and the clean gas tank outlet pipe through a three-way joint, the lower part of the side of the clean gas tank is connected to the clean gas tank inlet pipe, and the bottom is connected to the clean gas tank liquid outlet pipe, and the clean gas tank inner cavity is fixedly connected with an equalizing air flow plate above the clean gas tank inlet pipe. Water is added to the clean gas tank through the clean gas tank inlet pipe, and the gas to be treated enters the clean gas tank through the clean gas tank inlet pipe. The dust particles and impurities in the gas are cleaned and filtered out by the water therein. The uniform flow plate has a certain blocking effect on the rising gas, thereby ensuring the cleaning effect. The cleaned gas enters the absorption tower inlet pipe through the clean gas tank outlet pipe;

[0005] The liquid outlet pipe of the absorption tower is connected in series with the first water pump and the heat exchanger, and then is connected to the regeneration tower liquid inlet pipe of the regeneration tower. The regeneration tower liquid inlet pipe and the regeneration tower gas outlet pipe are respectively connected to the top of the regeneration tower. The other end of the regeneration tower gas outlet pipe is connected to the gas storage tank. A second motor is installed at the center of the top of the regeneration tower. The rotating shaft of the second motor vertically extends into the inner cavity of the regeneration tower and is fixedly connected to a multi-stage guide frame. The multi-stage guide frame includes a primary guide plate at the top, a secondary guide plate at the middle, and a The first-stage guide plate, the second-stage guide plate and the third-stage guide plate are arranged in a stepped funnel shape from large to small, and their peripheries are fixedly connected to a fixed support frame, and the fixed support frame is fixedly connected to the rotating shaft of the second motor. A second equalizing flow groove is fixedly connected to the top of the inner cavity of the regeneration tower, and the upper opening of the second equalizing flow groove corresponds to the regeneration tower liquid inlet pipe, and the lower part corresponds to the first-stage guide plate. The bottom of the regeneration tower is connected to the regeneration tower liquid outlet pipe and the heating liquid outlet pipe, and the absorption liquid entering the regeneration tower through the regeneration tower liquid inlet pipe falls to The second equalizing trough is evenly dispersed and sprinkled on the first-level guide plate. The multi-level guide frame is driven by the second motor to rotate in the regeneration tower, so that the absorption liquid falling on it is spread out and flows downward layer by layer through the first-level guide plate, the second-level guide plate and the third-level guide plate. In this process, the carbon dioxide can escape and diffuse out, and enter the gas storage tank through the regeneration tower outlet pipe to be absorbed. The regeneration tower outlet pipe is connected in series with the second water pump and the heat exchanger and then connected to the absorption tower inlet pipe. The bottom side of the regeneration tower is connected to a heating The absorption liquid heating device is installed between the liquid inlet pipe, the heated liquid outlet pipe and the heated liquid inlet pipe. After the absorption liquid falls to the bottom of the regeneration tower, it is circulated and heated by the absorption liquid heating device to ensure that the temperature of the absorption liquid is conducive to the removal of carbon dioxide. The absorption liquid after the carbon dioxide is removed enters the heat exchanger to exchange heat with the absorption liquid flowing from the absorption tower to the regeneration tower, thereby reducing the temperature of the absorption liquid flowing from the regeneration tower to the absorption tower to facilitate its absorption of carbon dioxide again, and at the same time increasing the temperature of the absorption liquid flowing from the absorption tower to the regeneration tower to facilitate the removal of carbon dioxide therein.

[0006] As a preferred solution of the present invention, a bubble stone column is fixedly connected to the end of the air inlet pipe of the absorption tower. The bubble stone column is located at the bottom of the inner cavity of the absorption tower. The gas is fully diffused into the absorption liquid at the bottom of the absorption tower through the bubble stone column, which is beneficial to the absorption of carbon dioxide by the absorption liquid.

[0007] As a preferred solution of the present invention, leakage holes are evenly opened on the bottom plate of the first flow balancing trough to ensure that the absorption liquid is evenly dispersed and dropped.

[0008] As a preferred solution of the present invention, the lower surface of the diverter plate is fixedly connected with diverter teeth which are evenly arranged radially, and the diverter teeth are provided with tooth grooves, and the tooth grooves are inclined grooves with a larger opening on one side and a smaller opening on the other side; the upper surface of the guide plate is a funnel surface with a thin center and a thick edge, and a diversion hole is provided in the center of the guide plate, and the lower edge of the diverter tooth fits the funnel surface; a conical platform is fixedly connected to the middle part of the upper surface of the diverter plate, and diversion grooves are provided on the diverter plate around the conical platform, and the conical platform corresponds to the diversion hole.

[0009] As a preferred solution of the present invention, a one-way valve is installed on the liquid inlet pipe of the clean gas tank, which can only allow water to enter the clean gas tank from the liquid inlet pipe of the clean gas tank, while the gas in the clean gas tank cannot flow from the liquid inlet pipe of the clean gas tank, and can only flow from the gas outlet pipe of the clean gas tank.

[0010] As a preferred solution of the present invention, a drain valve is installed on the liquid outlet pipe of the clean air tank, and dirty water containing impurities absorbed by the clean air tank can be drained by opening the drain valve.

[0011] Beneficial effects of the present invention: The present invention adds a clean gas tank to the air intake pipeline for absorbing carbon dioxide, which can filter particulate impurities in the gas, ensure the cleanliness of the gas, avoid affecting other equipment during the later processing, and reduce the frequency of equipment failure and cleaning and maintenance. The designed absorption tower and regeneration tower both use motors as power sources. The motor drives the absorption liquid separation plate group to rotate in the absorption tower, and the interaction between the diverter plate, the guide plate and the diverter plate is used to enable the absorption liquid to flow in a dispersed and flat manner, and fully contact with the relatively circulating gas, thereby effectively improving the absorption effect of the absorption liquid on carbon dioxide. The regeneration tower drives the multi-stage guide frame to rotate through the motor, so that the flowing absorption liquid can be spread and dispersed, which is convenient for the removal of carbon dioxide therein. The entire system equipment is optimized, reducing the use of components such as water pumps and nozzles, and can effectively reduce the failure rate and maintenance rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0013] Figure 2 It is a cross-sectional view of the internal structure of the absorption tower of the present invention;

[0014] Figure 3 It is a partial enlarged view of the cross-sectional view of the internal structure of the absorption tower of the present invention;

[0015] Figure 4 It is a schematic diagram of the structure of the diverter plate of the present invention;

[0016] Figure 5 It is a schematic diagram of the guide plate structure of the present invention;

[0017] Figure 6 It is a schematic diagram of the structure of the diverter plate of the present invention;

[0018] Figure 7 A cross-sectional view of the internal structure of the gas purification tank of the present invention;

[0019] Figure 8 It is a cross-sectional view of the internal structure of the regeneration tower of the present invention.

[0020] In the figure: 1 absorption tower, 101 absorption tower air inlet pipe, 1011 bubble stone column, 102 absorption tower exhaust pipe, 103 absorption tower liquid inlet pipe, 104 first motor, 105 absorption liquid separation plate group, 106 first flow balancing slot, 1061 leakage hole, 107 absorption tower liquid outlet pipe, 108 diverter plate, 1081 diverter tooth, 1082 tooth groove, 109 guide plate, 1091 funnel surface, 1092 diversion hole, 110 diverter plate, 1101 cone table, 1102 diversion slot, 2 clean gas tank, 201 clean gas tank air inlet pipe, 202 three-way joint, 203 clean gas tank liquid inlet pipe, 2031 one-way valve, 204 clean gas tank outlet pipe, 205 equalizing air plate, 206 clean gas tank liquid outlet pipe, 2061 drain valve, 3 first water pump, 4 heat exchanger, 5 regeneration tower, 501 regeneration tower liquid inlet pipe, 502 second motor, 503 regeneration tower outlet pipe, 504 second equalizing trough, 505 multi-stage guide frame, 5051 first-level guide plate, 5052 second-level guide plate, 5053 third-level guide plate, 5054 fixed support frame, 506 regeneration tower liquid outlet pipe, 507 heating liquid outlet pipe, 508 heating liquid inlet pipe, 6 second water pump, 7 gas storage tank, 8 absorption liquid heating device. DETAILED DESCRIPTION

[0021] Example 1

[0022] like Figures 1 to 8As shown, a carbon dioxide recovery system of the present invention, the top of the clean gas tank 2 is connected to the clean gas tank liquid inlet pipe 203 and the clean gas tank outlet pipe 204 through a three-way joint 202, the lower part of the side of the clean gas tank 2 is connected to the clean gas tank inlet pipe 201, and the bottom is connected to the clean gas tank liquid outlet pipe 206, and the inner cavity of the clean gas tank 2 is fixedly connected to the clean gas tank inlet pipe 201 above the clean gas tank. Water is added to the clean gas tank 2 through the clean gas tank liquid inlet pipe 203, and the gas to be treated enters the clean gas tank 2 through the clean gas tank inlet pipe 201. The dust particles and impurities in the gas are cleaned and filtered out by the water therein, and the evenly distributed ventilation plate 205 has a certain blocking effect on the rising gas, thereby ensuring the cleaning effect. A one-way valve 2031 is installed on the clean gas tank inlet pipe 203, which can only allow water to enter the clean gas tank 2 from the clean gas tank inlet pipe 203, while the gas in the clean gas tank 2 cannot flow from the clean gas tank inlet pipe 203, and can only flow from the clean gas tank outlet pipe 204; a drain valve 2061 is installed on the clean gas tank outlet pipe 206, and the dirty water containing impurities absorbed in the clean gas tank 2 can be drained by opening the drain valve 2061. The absorption tower inlet pipe 101 is connected to the clean gas tank outlet pipe 204 on the clean gas tank 2, and the cleaned gas enters the absorption tower inlet pipe 101 through the clean gas tank outlet pipe 204 and flows into the absorption tower 1.

[0023] The bottom of the side of the absorption tower 1 is connected to an absorption tower air inlet pipe 101, and the end of the absorption tower air inlet pipe 101 is fixedly connected to a bubble stone column 1011, which is located at the bottom of the inner cavity of the absorption tower 1. The gas is fully diffused into the absorption liquid at the bottom of the absorption tower 1 through the bubble stone column 1011, which is beneficial to the absorption of carbon dioxide by the absorption liquid. The top of the absorption tower 1 is respectively connected to the absorption tower exhaust pipe 102 and the absorption tower liquid inlet pipe 103. A first motor 104 is installed at the center of the top of the absorption tower 1. The rotating shaft of the first motor 104 vertically extends into the inner cavity of the absorption tower 1, and an absorption diverter plate group 105 is evenly arranged at equal intervals along the rotating shaft direction. The absorption diverter plate group 105 includes a diverter plate 108, a guide plate 109 and a diverter plate 110. The diverter plate 108 is fixedly connected to the rotating shaft of the first motor 104. 8 is fitted with a guide plate 109 below, the guide plate 109 is fixedly connected to the inner wall of the absorption tower 1, and a diverter plate 110 is fixedly connected to the rotating shaft of the first motor 104 below the guide plate 109, and the lower surface of the diverter plate 108 is evenly arranged and fixedly connected with diverter teeth 1081 along the radial direction, and the diverter teeth 1081 are provided with tooth grooves 1082, and the tooth grooves 1082 are inclined grooves with a large opening on one side and a small opening on the other side; the upper surface of the guide plate 109 is a funnel surface 1091 with a thin center and a thick edge, and a diversion hole 1092 is provided in the center of the guide plate 109, and the lower edge of the diverter tooth 1081 fits the funnel surface 1091; a conical platform 1101 is fixedly connected to the middle part of the upper surface of the diverter plate 110, and diversion slots 1102 are provided on the diverter plate 110 around the conical platform 1101, and the conical platform 1101 corresponds to the diversion hole 1092;

[0024] A first flow balancing trough 106 is fixedly connected to the top of the inner cavity of the absorption tower 1, and leakage holes 1061 are evenly opened on the bottom plate of the first flow balancing trough 106 to ensure the uniform dispersion and falling of the absorption liquid. The upper opening of the first flow balancing trough 106 corresponds to the absorption tower liquid inlet pipe 103, and the lower part corresponds to the diverter plate 108; the rotating shaft of the first motor 104 rotates through the center of the first flow balancing trough 106, and the bottom of the absorption tower 1 is connected to the absorption tower liquid outlet pipe 107. The absorption liquid enters the inner cavity of the absorption tower 1 from the absorption tower liquid inlet pipe 103, falls into the first flow balancing groove 106, and then evenly falls on the diverter plate 108 below. The first motor 104 drives the diverter plate 108 and the diverter plate 110 to rotate, so that the absorption liquid falling on the diverter plate 108 is driven to be scattered around, and falls on the guide plate 109 to flow toward the center. During the flow process, the diverter teeth 1081 divert the absorption liquid, and the tooth grooves 1082 can make the absorption liquid splash, so as to effectively contact with the gas flowing between the diverter plate 108 and the guide plate 109, and fill the absorption liquid. The absorption liquid flows toward the flow guide holes 1092 on the funnel surface 1091, and finally falls onto the diverter plate 110, and finally passes through the diverter slot 1102 to fall onto the next absorption diverter plate group 105 through the guidance of the conical platform 1101. After being diverted by multiple stages of absorption diverter plate groups 105, the absorption liquid finally falls to the bottom of the absorption tower 1, and the gas to be absorbed enters the absorption tower 1 from the absorption tower inlet pipe 101, flows upward, and is fully in contact with the absorption liquid when passing through the absorption diverter plate group 105, so that the absorption liquid absorbs the carbon dioxide therein.

[0025] The absorption tower liquid outlet pipe 107 is connected in series with the first water pump 3 and the heat exchanger 4, and then communicated with the regeneration tower liquid inlet pipe 501 of the regeneration tower 5. The regeneration tower liquid inlet pipe 501 and the regeneration tower gas outlet pipe 503 are respectively connected to the top of the regeneration tower 5. The other end of the regeneration tower gas outlet pipe 503 is connected to the gas storage tank 7. A second motor 502 is installed at the center of the top of the regeneration tower 5. The rotating shaft of the second motor 502 vertically extends into the inner cavity of the regeneration tower 5 and is fixedly connected to a multi-stage guide frame 505. The multi-stage guide frame 505 includes a primary guide plate 5051 at the top, a secondary guide plate 5052 at the middle, and a tertiary guide plate 5053 at the bottom. The primary guide plate 5051, the secondary guide plate 5052, and the tertiary guide plate 5053 are arranged in a stepped funnel shape from large to small, and their peripheries are fixedly connected to a fixed support frame 5054. The fixed support frame 5054 is fixedly connected The second equalizing groove 504 is fixedly connected to the top of the inner cavity of the regeneration tower 5, and the upper opening of the second equalizing groove 504 corresponds to the regeneration tower liquid inlet pipe 501, and the lower part corresponds to the primary guide plate 5051. The bottom of the regeneration tower 5 is connected to the regeneration tower liquid outlet pipe 506 and the heating liquid outlet pipe 507. The absorption liquid entering the regeneration tower 5 through the regeneration tower liquid inlet pipe 501 falls into the second equalizing groove 504 and is evenly dispersed and sprinkled on the primary guide plate 5051. The multi-stage guide frame 505 is driven by the second motor 502 to rotate in the regeneration tower 5, so that the absorption liquid falling thereon is spread out and flows downward layer by layer through the primary guide plate 5051, the secondary guide plate 5052 and the tertiary guide plate 5053. In this process, the carbon dioxide therein can escape and diffuse out, and enter the gas storage tank 7 through the regeneration tower gas outlet pipe 503 to be absorbed;

[0026] The regeneration tower liquid outlet pipe 506 is connected in series with the second water pump 6 and the heat exchanger 4 and then connected to the absorption tower liquid inlet pipe 103. The bottom side of the regeneration tower 5 is connected with a heating liquid inlet pipe 508. An absorption liquid heating device 8 is installed between the heating liquid outlet pipe 507 and the heating liquid inlet pipe 508. After the absorption liquid falls to the bottom of the regeneration tower 5, it is circulated and heated by the absorption liquid heating device 8 to ensure that the temperature of the absorption liquid is conducive to the removal of carbon dioxide. The absorption liquid after the carbon dioxide is removed enters the heat exchanger 4 and exchanges heat with the absorption liquid flowing from the absorption tower 1 to the regeneration tower 5, thereby reducing the temperature of the absorption liquid flowing from the regeneration tower 5 to the absorption tower 1 to facilitate its absorption of carbon dioxide again, and at the same time increasing the temperature of the absorption liquid flowing from the absorption tower 1 to the regeneration tower 5 to facilitate the removal of carbon dioxide therein.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0029] Components and circuit control portions not described in detail herein are prior art.

[0030] Although the specific embodiments of the present invention are described in detail above, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of the present invention, and modifications or deformations without creative labor are still within the protection scope of the present invention.

Claims

1. A carbon dioxide recovery system, comprising an absorption tower (1), a heat exchanger (4), and an absorption liquid heating device (8), characterized in that: The bottom of the side of the absorption tower (1) is connected to an absorption tower air inlet pipe (101), and the top of the absorption tower (1) is respectively connected to an absorption tower exhaust pipe (102) and an absorption tower liquid inlet pipe (103). A first motor (104) is installed at the center of the top of the absorption tower (1). The rotation shaft of the first motor (104) vertically extends into the inner cavity of the absorption tower (1), and an absorption diverter plate group (105) is evenly arranged at equal intervals along the rotation shaft direction. The absorption diverter plate group (105) includes a diverter plate (108), a guide plate (109) and a diverter plate (110). The diverter plate (108) is fixedly connected to the rotation shaft of the first motor (104). The diverter plate (110) is fixedly connected to the rotation shaft of the first motor (104). The guide plate (109) is arranged in close contact with the lower part of the absorption tower (108), the guide plate (109) is fixedly connected to the inner wall of the absorption tower (1), the flow distribution plate (110) is fixedly connected to the rotating shaft of the first motor (104) below the guide plate (109), the first flow balancing groove (106) is fixedly connected to the top of the inner cavity of the absorption tower (1), the upper opening of the first flow balancing groove (106) corresponds to the absorption tower liquid inlet pipe (103), and the lower part corresponds to the flow distribution plate (108), the rotating shaft of the first motor (104) rotates through the center of the first flow balancing groove (106), and the bottom of the absorption tower (1) is connected to the absorption tower liquid outlet pipe (107);The absorption tower air inlet pipe (101) is connected to the clean air tank air outlet pipe (204) on the clean air tank (2); the top of the clean air tank (2) is connected to the clean air tank liquid inlet pipe (203) and the clean air tank air outlet pipe (204) via a three-way joint (202); the lower part of the side of the clean air tank (2) is connected to the clean air tank air inlet pipe (201); the bottom is connected to the clean air tank liquid outlet pipe (206); an evenly distributed air flow plate (205) is fixedly connected above the clean air tank air inlet pipe (201) in the inner cavity of the clean air tank (2); and the absorption tower liquid outlet pipe (107) is connected in series with the first and second absorbent plates (206) of the absorbent tower. A water pump (3) and the heat exchanger (4) are connected to the regeneration tower liquid inlet pipe (501) of the regeneration tower (5), the regeneration tower liquid inlet pipe (501) and the regeneration tower gas outlet pipe (503) are respectively connected to the top of the regeneration tower (5), the other end of the regeneration tower gas outlet pipe (503) is connected to the gas storage tank (7), a second motor (502) is installed at the center of the top of the regeneration tower (5), the rotating shaft of the second motor (502) vertically extends into the inner cavity of the regeneration tower (5), and is fixedly connected to a multi-stage guide frame (505), the multi-stage guide frame (505) includes a second motor (502) located at the top of the regeneration tower (5), and a second motor (502) is installed at the top of the regeneration tower (5). The first-level guide plate (5051) at the top, the second-level guide plate (5052) at the middle, and the third-level guide plate (5053) at the bottom, the first-level guide plate (5051), the second-level guide plate (5052), and the third-level guide plate (5053) are arranged in a stepped funnel shape from large to small, and their peripheries are fixedly connected to a fixed support frame (5054), and the fixed support frame (5054) is fixedly connected to the rotating shaft of the second motor (502). The top of the inner cavity of the regeneration tower (5) is fixedly connected to a second flow balancing trough (504), and the upper part of the second flow balancing trough (504) The opening corresponds to the regeneration tower liquid inlet pipe (501), and the lower part corresponds to the primary guide plate (5051). The bottom of the regeneration tower (5) is connected to the regeneration tower liquid outlet pipe (506) and the heating liquid outlet pipe (507). The regeneration tower liquid outlet pipe (506) is connected in series with the second water pump (6) and the heat exchanger (4) and then connected to the absorption tower liquid inlet pipe (103). The bottom side of the regeneration tower (5) is connected to the heating liquid inlet pipe (508). The absorption liquid heating device (8) is installed between the heating liquid outlet pipe (507) and the heating liquid inlet pipe (508).

2. A carbon dioxide recovery system according to claim 1, characterized in that: A bubble stone column (1011) is fixedly connected to the end of the absorption tower air inlet pipe (101), and the bubble stone column (1011) is located at the bottom of the inner cavity of the absorption tower (1).

3. A carbon dioxide recovery system according to claim 1, characterized in that: The bottom plate of the first flow balancing groove (106) is evenly provided with leakage holes (1061).

4. A carbon dioxide recovery system according to claim 1, characterized in that: The lower surface of the diverter plate (108) is evenly arranged and fixedly connected with diverter teeth (1081) along the radial direction, and the diverter teeth (1081) are provided with tooth grooves (1082), and the tooth grooves (1082) are inclined grooves with a larger opening on one side and a smaller opening on the other side.

5. A carbon dioxide recovery system according to claim 4, characterized in that: The upper surface of the guide plate (109) is a funnel surface (1091) which is thin in the center and thick at the edges. A flow guide hole (1092) is provided in the center of the guide plate (109), and the lower edge of the diverter tooth (1081) is in contact with the funnel surface (1091).

6. A carbon dioxide recovery system according to claim 5, characterized in that: A conical platform (1101) is fixedly connected to the middle of the upper surface of the diverter plate (110), and diverter slots (1102) are opened on the diverter plate (110) around the conical platform (1101), and the conical platform (1101) corresponds to the flow guide hole (1092).

7. A carbon dioxide recovery system according to claim 1, characterized in that: A one-way valve (2031) is installed on the liquid inlet pipe (203) of the clean gas tank.

8. A carbon dioxide recovery system according to claim 1, characterized in that: A liquid discharge valve (2061) is installed on the liquid outlet pipe (206) of the clean gas tank.

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