Carbon capture coupling system

Abstract

This invention discloses a carbon capture coupling system, relating to the field of carbon capture technology, including an air carbon capture system and a flue gas carbon capture system. The air carbon capture system has an adsorption layer for absorbing carbon dioxide within a reaction tower. A first pipeline is located at the bottom of the reaction tower, and a first discharge pipeline and a second discharge pipeline for separating carbon dioxide are connected in parallel at the top of the reaction tower. The first pipeline is connected to a second pipeline for supplying air to the reaction tower. The air, after capturing carbon dioxide in the adsorption layer, is discharged through the first discharge pipeline. The flue gas carbon capture system has a regeneration tower with a third pipeline connected in parallel with the second pipeline to the first pipeline. The third pipeline is used to supply regeneration gas from the regeneration tower to the reaction tower. The regeneration gas is used to pyrolyze in the adsorption layer to generate carbon dioxide, which is then discharged through the second discharge pipeline. The carbon capture coupling system of this invention has high thermal energy utilization efficiency and low production energy consumption.

Description

Technical Field

[0001] This invention relates to the field of carbon capture technology, and more specifically, to a carbon capture coupling system. Background Technology

[0002] Carbon capture, utilization, and storage (CCUS) is a crucial means of large-scale, low-carbon utilization of fossil fuels, playing a vital role in ensuring national energy security and building a strong energy nation. Carbon capture processes include various forms such as flue gas carbon capture and air carbon capture. Flue gas carbon capture often employs chemical absorption, where an amine solution is used as a carrier to absorb carbon dioxide from the flue gas, and the amine solution is regenerated through pyrolysis to obtain carbon dioxide. However, this process generates a large amount of high-temperature waste heat that is not utilized, resulting in low energy efficiency. Air carbon capture typically uses adsorbent materials to capture carbon dioxide, and the adsorbent material is then regenerated to obtain carbon dioxide. However, air carbon capture technology also suffers from high energy consumption and high production costs. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, this invention proposes a carbon capture coupling system with high thermal energy utilization efficiency and low production energy consumption.

[0005] The carbon capture coupling system of this invention includes:

[0006] An air carbon capture system includes an adsorption layer for absorbing carbon dioxide inside a reaction tower. A first pipeline is provided at the bottom of the reaction tower, and a first discharge pipeline and a second discharge pipeline are connected in parallel at the top of the reaction tower. The second discharge pipeline is used to separate carbon dioxide. The first pipeline is connected to a second pipeline for supplying air to the reaction tower. The air is discharged through the first discharge pipeline after capturing carbon dioxide through the adsorption layer. A flue gas carbon capture system, wherein the regeneration tower in the flue gas carbon capture system is provided with a third pipeline, the third pipeline being connected in parallel with the second pipeline to the first pipeline, the third pipeline being used to transport regeneration gas in the regeneration tower to the reaction tower, the regeneration gas being used to pyrolyze in the adsorption layer to generate carbon dioxide and discharge through the second emission pipeline.

[0007] The carbon capture coupling system of this invention couples an air carbon capture system and a flue gas carbon capture system together. The waste heat carried by the regeneration gas in the air carbon capture system can be used as a heat source for the reduction of the adsorption layer in the air carbon capture system, thereby reducing the energy consumption of the air carbon capture system, improving the overall energy utilization rate of the carbon capture coupling system, and reducing production costs.

[0008] In some embodiments, a heat pump assembly is further included, the heat pump assembly including an evaporator, a compressor and a first heat exchanger arranged sequentially through a circulation pipe, the evaporator being used to heat the heat exchange medium in the circulation pipe, the compressor being used to pressurize and heat the heat exchange medium and deliver the heat exchange medium to the first heat exchanger, the first heat exchanger being disposed in the third pipeline, and the first heat exchanger being used to heat the regeneration gas in the third pipeline through the heat exchange medium.

[0009] In some embodiments, the regeneration tower is provided with a fourth pipeline for conveying regeneration gas, the fourth pipeline is provided with a first gas-liquid separator, and the heat pump assembly further includes a second heat exchanger, the second heat exchanger is disposed between the evaporator and the compressor, and the second heat exchanger is disposed upstream of the first gas-liquid separator for heat exchange and temperature increase between the heat exchange medium in the circulation pipeline and the regeneration gas conveyed in the fourth pipeline.

[0010] In some embodiments, the fourth pipeline is provided with a first valve, and the third pipeline is provided with a second valve.

[0011] In some embodiments, a first three-way valve is provided at the top of the regeneration tower, the inlet of the first three-way valve is connected to the regeneration tower, the first outlet of the first three-way valve is connected to the third pipeline, and the second outlet of the first three-way valve is connected to the fourth pipeline.

[0012] In some embodiments, the first three-way valve is an electromagnetic flow valve, which is used to control the flow ratio of regenerated gas delivered from the regeneration tower to the third pipeline and the fourth pipeline.

[0013] In some embodiments, the heat pump assembly further includes a third heat exchanger disposed between the evaporator and the compressor. A fifth pipeline is provided at the bottom of the regeneration tower, and a reboiler is provided on the fifth pipeline. The drain end of the reboiler is connected to the third heat exchanger through a sixth pipeline. The heating liquid discharged from the reboiler exchanges heat with the heat exchange medium through the third heat exchanger to heat the heat exchange medium.

[0014] In some embodiments, the third heat exchanger is located downstream of the second heat exchanger.

[0015] In some embodiments, the flow direction of the heat exchange medium in the first heat exchanger is opposite to the flow direction of the regeneration gas in the third pipeline in the first heat exchanger.

[0016] In some embodiments, at least two reaction towers are provided, the second pipeline is provided with an air pump, at least two first branches are connected in parallel on the second pipeline, and the at least two first branches are respectively connected to the first pipes on at least two of the reaction towers, and at least two second branches are connected in parallel on the third pipeline, and the at least two second branches are respectively connected to the first pipes on at least two of the reaction towers.

[0017] In some embodiments, a third valve is provided on the first branch and a fourth valve is provided on the second branch, and at most one of the third valve and the fourth valve on the same first pipeline is open.

[0018] In some embodiments, a second three-way valve is provided on the first pipeline. The first inlet of the second three-way valve is connected to the first branch, and the second inlet of the second three-way valve is connected to the second branch. The second three-way valve is used to connect the first pipeline and the first branch, or to connect the first pipeline and the second branch.

[0019] In some embodiments, at least two of the second discharge pipes on the reaction towers are connected in parallel to a seventh pipeline, which is provided with a second gas-liquid separator for separating carbon dioxide from the regenerated gas. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the carbon capture coupling system according to an embodiment of the present invention.

[0021] Figure label: Reactor tower 1; First pipeline 11; First discharge pipeline 12; Second discharge pipeline 13; Second pipeline 14; First branch 141; Air pump 15; Second three-way valve 16; Seventh pipeline 17; Second gas-liquid separator 18; Regeneration tower 2; Third pipeline 21; Second valve 211; Second branch 212; Fourth pipeline 22; First valve 221; First gas-liquid separator 23; Fifth pipeline 24; Reboiler 25; Sixth pipeline 26; Heat pump assembly 3; circulation pipe 31; evaporator 32; compressor 33; first heat exchanger 34; expansion valve 35; second heat exchanger 36; third heat exchanger 37. Detailed Implementation

[0022] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] like Figure 1 As shown, the carbon capture coupling system of this invention includes an air carbon capture system and a flue gas carbon capture system.

[0024] The reaction tower 1 in the air carbon capture system is equipped with an adsorption layer for absorbing carbon dioxide. The bottom of the reaction tower 1 is equipped with a first pipe 11, and the top of the reaction tower 1 is equipped with a first discharge pipe 12 and a second discharge pipe 13 connected in parallel. The second discharge pipe 13 is used to separate carbon dioxide. The first pipe 11 is connected to a second pipe 14 for supplying air to the reaction tower 1. After the air captures carbon dioxide through the adsorption layer, it is discharged through the first discharge pipe 12.

[0025] The regeneration tower 2 in the flue gas carbon capture system is equipped with a third pipeline 21, which is connected in parallel with the second pipeline 14 to the first pipeline 11. The third pipeline 21 is used to transport the regeneration gas in the regeneration tower 2 to the reaction tower 1. The regeneration gas is used to pyrolyze in the adsorption layer to generate carbon dioxide and is discharged through the second discharge pipeline 13.

[0026] Specifically, the air carbon capture system also includes an adsorption tower and a lean-rich liquid heat exchanger. Flue gas enters the adsorption tower and rises from the bottom to the top. Carbon dioxide in the flue gas is adsorbed by the amine solution sprayed at the top of the adsorption tower to form a rich liquid. The decarbonized flue gas is discharged from the top of the adsorption tower for further treatment. The rich liquid gathers at the bottom of the adsorption tower and enters the top of the regeneration tower 2 through the lean-rich liquid heat exchanger. The rich liquid is pyrolyzed in the regeneration tower 2 to obtain regeneration gas containing carbon dioxide and lean liquid. The lean liquid gathers at the bottom of the regeneration tower 2 and is discharged back to the top of the adsorption tower through the lean-rich liquid heat exchanger. The regeneration gas is discharged through the third pipeline 21 and can enter the reaction tower 1 through the first pipeline 11.

[0027] The working principle of the carbon capture coupling system in this embodiment of the invention is as follows: when carbon dioxide is captured in the adsorption layer of the reaction tower 1, air enters the interior of the reaction tower 1 through the second pipe 14 and the first pipe 11. Carbon dioxide in the air is captured at the adsorption layer position of the reaction tower 1, and the decarbonized air is discharged through the first discharge pipe 12 at the top of the reaction tower 1. When carbon dioxide is released from the adsorption layer of reaction tower 1, regeneration tower 2 delivers regeneration gas into reaction tower 1 through the third pipeline 21. The regeneration gas carries residual heat and causes the adsorption layer to pyrolyze to release carbon dioxide. The regeneration gas and the carbon dioxide released from the adsorption layer enter the second discharge pipeline 13, where carbon dioxide is further separated.

[0028] The carbon capture coupling system of this invention couples an air carbon capture system and a flue gas carbon capture system together. The waste heat carried by the regeneration gas in the air carbon capture system can be used as a heat source for the reduction of the adsorption layer in the air carbon capture system, thereby reducing the energy consumption of the air carbon capture system, improving the overall energy utilization rate of the carbon capture coupling system, and reducing production costs.

[0029] In some embodiments, such as Figure 1 As shown, it also includes a heat pump assembly 3, which includes an evaporator 32, a compressor 33 and a first heat exchanger 34 connected in sequence through a circulation pipe 31. The evaporator 32 is used to heat the heat exchange medium in the circulation pipe 31. The compressor 33 is used to pressurize and heat the heat exchange medium and deliver the heat exchange medium to the first heat exchanger 34. The first heat exchanger 34 is located in the third pipe 21 and is used to heat the regeneration gas in the third pipe 21 through the heat exchange medium.

[0030] In this embodiment, by setting up the heat pump assembly 3 to heat the regeneration gas in the third pipeline 21, the system energy consumption is reduced. The heat pump assembly 3 pressurizes and heats the heat exchange medium in the circulation pipeline 31, increases the heat exchange heating effect of the first heat exchanger 34 on the regeneration gas in the third pipeline 21, increases the temperature of the regeneration gas in the third pipeline 21, and thus improves the separation effect of carbon dioxide in the reaction tower 1.

[0031] Specifically, an expansion valve 35 is provided between the first heat exchanger 34 and the evaporator 32. The expansion valve 35 is used to regulate the heat exchange pressure of the heat exchange medium delivered from the first heat exchanger 34 to the evaporator 32.

[0032] In some embodiments, such as Figure 1 As shown, the regeneration tower 2 is provided with a fourth pipeline 22 for conveying regeneration gas. A first gas-liquid separator 23 is provided on the fourth pipeline 22. The heat pump assembly 3 also includes a second heat exchanger 36. The second heat exchanger 36 is located between the evaporator 32 and the compressor 33, and is located upstream of the first gas-liquid separator 23 to provide heat exchange medium in the circulation pipeline 31 with the regeneration gas conveyed in the fourth pipeline 22 for heating.

[0033] In this embodiment, by setting a second heat exchanger 36, the regeneration gas discharged from the regeneration tower 2 through the fourth pipeline 22 can exchange heat with the heat exchange medium in the circulation pipeline 31 through the second heat exchanger 36. On the one hand, it realizes the condensation of part of the regeneration gas discharged from the regeneration tower 2, which facilitates the gas-liquid separation of the regeneration gas in the first gas-liquid separator 23. On the other hand, it provides heat to the heat exchange medium in the circulation pipeline 31, which facilitates the heating of the heat exchange medium in the circulation pipeline 31, thereby reducing the energy consumption of the evaporator 32 in heating the circulation medium or replacing the evaporator 32 in heating the heat exchange medium. This improves the energy utilization rate of the carbon capture coupling system and reduces production energy consumption and cost.

[0034] Specifically, when the reaction tower 1 is capturing carbon in the air, the third pipeline 21 can be closed, and all the regenerated gas can be discharged through the fourth pipeline 22. At the second heat exchanger 36, the residual heat in the regenerated gas is stored through the heat exchange medium to accumulate energy for the subsequent thermal decomposition of carbon dioxide in the adsorption layer of the reaction tower 1. When the adsorption layer of the reaction tower 1 releases carbon dioxide, the third pipeline 21 and the fourth pipeline 22 can be opened at the same time, so that the regenerated gas can be discharged through the third valve and the fourth valve respectively, thereby realizing the staged thermal utilization of the regenerated gas.

[0035] In some embodiments, such as Figure 1 As shown, the fourth pipeline 22 is equipped with a first valve 221, and the third pipeline 21 is equipped with a second valve 211. The opening and closing control of the fourth pipeline 22 and the third pipeline 21 is realized through the first valve 221 and the second valve 211, which facilitates the control of the conveying path of the regenerated gas generated by the regeneration tower 2, and facilitates the improvement of the utilization rate and efficiency of the waste heat of the regenerated gas.

[0036] In some embodiments, a first three-way valve is provided at the top of the regeneration tower 2. The inlet of the first three-way valve is connected to the regeneration tower 2, the first outlet of the first three-way valve is connected to the third pipeline 21, and the second outlet of the first three-way valve is connected to the fourth pipeline 22. By setting the first three-way valve, the number of control valves can be reduced, the structure can be simplified, and the control of the fourth pipeline 22 and the third pipeline 21 can be facilitated, making the operation convenient.

[0037] In some embodiments, the first three-way valve is an electromagnetic flow valve. The first three-way valve is used to control the flow ratio of regenerated gas delivered from the regeneration tower 2 to the third pipeline 21 and the fourth pipeline 22. By setting the first three-way valve as an electromagnetic flow valve, it is convenient to remotely control the first three-way valve. At the same time, the flow ratio of regenerated gas delivered from the regeneration tower 2 to the third pipeline 21 and the fourth pipeline 22 can be adjusted by the first three-way valve, which is convenient to improve the utilization efficiency of waste heat of regenerated gas in the third pipeline 21 and the fourth pipeline 22.

[0038] In some embodiments, such as Figure 1 As shown, the heat pump assembly 3 also includes a third heat exchanger 37, which is located between the evaporator 32 and the compressor 33. The bottom of the regeneration tower 2 is provided with a fifth pipe 24, and a reboiler 25 is provided on the fifth pipe 24. The drain end of the reboiler 25 is connected to the third heat exchanger 37 through a sixth pipe 26. The heating liquid discharged from the reboiler 25 exchanges heat with the heat exchange medium through the third heat exchanger 37 to heat the heat exchange medium.

[0039] In this embodiment, by setting a third heat exchanger 37, the residual heat of the heating liquid at the drain end of the reboiler 25 connected to the regeneration tower 2 is further utilized to provide heat to the heat exchange medium in the circulation pipe 31, which facilitates the heating of the heat exchange medium in the circulation pipe 31, thereby reducing the energy consumption of the evaporator 32 in heating the circulation medium or replacing the evaporator 32 in heating the heat exchange medium, improving the energy utilization rate of the carbon capture coupling system, and reducing production energy consumption and costs.

[0040] In some embodiments, such as Figure 1 As shown, the third heat exchanger 37 is located downstream of the second heat exchanger 36. By limiting the position of the third heat exchanger 37, it is convenient for the second heat exchanger 36 and the third heat exchanger 37 to heat the heat exchange in the circulation pipe 31 in stages, thereby improving the heat exchange efficiency and further improving the energy utilization rate.

[0041] In some embodiments, the flow direction of the heat exchange medium in the first heat exchanger 34 is opposite to the flow direction of the regeneration gas in the third pipeline 21 in the first heat exchanger 34. By limiting the flow directions of the heat exchange medium and the regeneration gas in the first heat exchanger 34, the heat exchange efficiency is improved, the waste heat utilization efficiency is improved, and energy consumption and production costs are reduced.

[0042] In some embodiments, such as Figure 1 As shown, reaction tower 1 is provided with at least two, second pipeline 14 is provided with air pump 15, at least two first branches 141 are connected in parallel on second pipeline 14, at least two first branches 141 are respectively connected to the first pipe on at least two reaction towers 1, and at least two second branches 212 are connected in parallel on third pipeline 21, at least two second branches 212 are respectively connected to the first pipe on at least two reaction towers 1.

[0043] In this embodiment, by setting at least two reaction towers 1, air carbon capture can be carried out through the adsorption layer of one or more reaction towers 1, and carbon dioxide can be re-collected through the thermal decomposition of the adsorption layer of one or more reaction towers 1. This improves the carbon capture efficiency of the air carbon capture system and enables continuous operation of the first heat exchanger 34, which facilitates the improvement of the utilization efficiency of the waste heat of the regenerated gas and the waste heat of the heating liquid of the reboiler 25, and reduces energy consumption and production costs.

[0044] In some embodiments, a third valve is provided on the first branch 141 and a fourth valve is provided on the second branch 212. At most one of the third valve and the fourth valve on the same first pipeline 11 is open. By setting the third valve and the fourth valve, the first branch 141 and the second branch 212 are controlled. By opening one of the third valve and the fourth valve, the air and regeneration gas supplied to the reaction tower 1 are controlled, so as to realize the continuous carbon capture operation of the reaction tower 1 and improve the carbon capture efficiency of the air carbon capture system.

[0045] In some embodiments, such as Figure 1 As shown, a second three-way valve 16 is provided on the first pipeline 11. The first inlet of the second three-way valve 16 is connected to the first branch 141, and the second inlet of the second three-way valve 16 is connected to the second branch 212. The second three-way valve 16 is used to connect the first pipeline 11 and the first branch 141, or to connect the first pipeline 11 and the second branch 212. By setting the second three-way valve 16, the number of control valves can be reduced, the structure can be simplified, and the control of the first branch 141 and the second branch 212 can be facilitated, making the operation convenient.

[0046] In some embodiments, such as Figure 1 As shown, at least two second discharge pipes on the reaction tower 1 are connected in parallel to the seventh pipeline 17. The seventh pipeline 17 is equipped with a second gas-liquid separator 18, which is used to separate carbon dioxide from the regeneration gas. The connection of the second discharge pipes on at least two reaction tower 1 to the seventh pipeline 17 facilitates a unified gas-liquid separation operation of the regeneration gas discharged from the reaction tower 1, simplifies the system structure, reduces the system equipment cost, and improves the efficiency of separating carbon dioxide from the regeneration gas.

[0047] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0051] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0052] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A carbon capture coupling system, characterized by, include: An air carbon capture system includes an adsorption layer for absorbing carbon dioxide inside a reaction tower. A first pipeline is provided at the bottom of the reaction tower, and a first discharge pipeline and a second discharge pipeline are connected in parallel at the top of the reaction tower. The second discharge pipeline is used to separate carbon dioxide. The first pipeline is connected to a second pipeline for supplying air to the reaction tower. The air is discharged through the first discharge pipeline after capturing carbon dioxide through the adsorption layer. A flue gas carbon capture system, wherein the regeneration tower in the flue gas carbon capture system is provided with a third pipeline, the third pipeline being connected in parallel with the second pipeline to the first pipeline, the third pipeline being used to transport regeneration gas in the regeneration tower to the reaction tower, the regeneration gas being used to pyrolyze in the adsorption layer to generate carbon dioxide and discharge through the second emission pipeline.

2. The carbon capture coupled system of claim 1, wherein, It also includes a heat pump assembly, which includes an evaporator, a compressor, and a first heat exchanger connected in sequence through a circulation pipe. The evaporator is used to heat the heat exchange medium in the circulation pipe. The compressor is used to pressurize and heat the heat exchange medium and deliver the heat exchange medium to the first heat exchanger. The first heat exchanger is located in the third pipeline and is used to heat the regeneration gas in the third pipeline through the heat exchange medium.

3. The carbon capture coupled system of claim 2, wherein, The regeneration tower is provided with a fourth pipeline for conveying regeneration gas. The fourth pipeline is provided with a first gas-liquid separator. The heat pump assembly also includes a second heat exchanger. The second heat exchanger is located between the evaporator and the compressor, and is located upstream of the first gas-liquid separator to allow the heat exchange medium in the circulation pipeline to exchange heat with the regeneration gas conveyed in the fourth pipeline to raise its temperature.

4. The carbon capture coupled system of claim 3, wherein, The fourth pipeline is equipped with a first valve, and the third pipeline is equipped with a second valve; or The top of the regeneration tower is provided with a first three-way valve. The inlet of the first three-way valve is connected to the regeneration tower, the first outlet of the first three-way valve is connected to the third pipeline, and the second outlet of the first three-way valve is connected to the fourth pipeline.

5. The carbon capture coupling system according to claim 4, characterized in that, The first three-way valve is an electromagnetic flow valve, which is used to control the flow ratio of regenerated gas delivered from the regeneration tower to the third pipeline and the fourth pipeline.

6. The carbon capture coupling system according to any one of claims 3-5, characterized in that, The heat pump assembly also includes a third heat exchanger, which is located between the evaporator and the compressor. The bottom of the regeneration tower is provided with a fifth pipeline, and a reboiler is provided on the fifth pipeline. The drain end of the reboiler is connected to the third heat exchanger through a sixth pipeline. The heating liquid discharged from the reboiler exchanges heat with the heat exchange medium through the third heat exchanger to heat the heat exchange medium.

7. The carbon capture coupling system according to claim 6, characterized in that, The third heat exchanger is located downstream of the second heat exchanger; and / or, The flow direction of the heat exchange medium in the first heat exchanger is opposite to the flow direction of the regeneration gas in the third pipeline in the first heat exchanger.

8. The carbon capture coupling system according to any one of claims 1-5, characterized in that, The reaction tower is provided with at least two, the second pipeline is provided with an air pump, and at least two first branches are connected in parallel on the second pipeline. The at least two first branches are respectively connected to the first pipes on the at least two reaction towers. The third pipeline is provided with at least two second branches in parallel. The at least two second branches are respectively connected to the first pipes on the at least two reaction towers.

9. The carbon capture coupling system according to claim 8, characterized in that, A third valve is provided on the first branch, and a fourth valve is provided on the second branch. At most one of the third valve and the fourth valve on the same first pipeline may be open; or, The first pipeline is equipped with a second three-way valve. The first inlet of the second three-way valve is connected to the first branch, and the second inlet of the second three-way valve is connected to the second branch. The second three-way valve is used to connect the first pipeline and the first branch, or to connect the first pipeline and the second branch.

10. The carbon capture coupling system according to claim 8, characterized in that, At least two of the reaction towers have their second discharge pipes connected in parallel to a seventh pipeline, which is equipped with a second gas-liquid separator for separating carbon dioxide from the regenerated gas.

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