System for capturing CO2 through electrochemical mediation amine regeneration method

Abstract

The invention relates to the technical field of carbon dioxide capture, and particularly discloses a system for capturing CO2 by an electrochemical mediation amine regeneration method, which comprises an absorption tower, a cooling tank, an electrolyte preheating tank, an electrolytic bath and a heat exchange assembly, a liquid inlet and a liquid outlet of the cooling tank are communicated with a liquid outlet of the upper-layer tower body and a liquid inlet of the lower-layer tower body respectively, a liquid inlet of the electrolyte preheating tank is communicated with a liquid outlet of the lower-layer tower body, and the electrolytic bath comprises a rich liquid inlet communicated with the liquid outlet of the lower-layer tower body, a barren liquid outlet communicated with the liquid inlet of the upper-layer tower body and an exhaust port. The heat exchange assembly comprises a first heat exchange pipe, a second heat exchange pipe and a first circulating pump which are sequentially connected end to end, the first heat exchange pipe is located in the cooling tank, and the second heat exchange pipe is located in the electrolyte preheating tank. The heat pump is used for cooling the absorbent and bringing heat to the electrolytic bath for heating at the same time, so that the adsorption effect is improved, and reduction of electrolysis voltage and desorption of CO2 are facilitated.

Description

Technical Field

[0001] The present invention relates to the field of carbon dioxide capture technology, and in particular to a method for capturing CO2 by electrochemical mediated amine regeneration. 2 system. Background Art

[0002] In carbon dioxide capture technology, electrochemical mediated amine regeneration method regenerates amine solution through an electrochemical process to achieve CO 2 The capture and separation of CO has attracted wide attention due to its high efficiency and environmental protection. 2 Heat is released during the process, causing the temperature of the absorbent to rise, which in turn affects its adsorption capacity. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, an embodiment of the present invention provides a method for capturing CO by electrochemical mediated amine regeneration. 2 A system for capturing CO by electrochemically mediated amine regeneration 2 The system uses a heat pump to cool the absorbent and bring heat to the electrolyzer for heating. The absorbent adsorption capacity increases as the temperature decreases. After cooling in the intermediate cooling tank, the adsorption effect can be improved. In addition, the temperature increase of the electrolyzer is conducive to the reduction of electrolysis voltage and CO 2 analysis, saving power consumption.

[0004] The electrochemical mediated amine regeneration method for capturing CO in the embodiment of the present invention 2 The system comprises an absorption tower, a cooling tank, an electrolyte preheating tank, an electrolytic cell and a heat exchange component, wherein the absorption tower comprises an upper tower body and a lower tower body, wherein the top of the upper tower body is suitable for communicating with a downstream exhaust pipe, and the bottom of the lower tower body is suitable for communicating with an upstream feed pipe, the liquid inlet of the cooling tank is communicated with the liquid outlet of the upper tower body, the liquid outlet of the cooling tank is communicated with the liquid inlet of the lower tower body, the liquid inlet of the electrolyte preheating tank is communicated with the liquid outlet of the lower tower body, the electrolytic cell comprises a rich liquid inlet, a lean liquid outlet and an exhaust port, and the rich liquid inlet is communicated with the liquid outlet of the lower tower body The lean liquid outlet is connected to the liquid inlet of the upper tower body, and the exhaust port is suitable for connecting to the downstream collecting pipe. The heat exchange component includes a first heat exchange tube, a second heat exchange tube and a first circulation pump which are sequentially connected end to end. There is heat exchange medium in the first heat exchange tube and the second heat exchange tube. The first heat exchange tube is located in the cooling tank so that the heat exchange medium in the first heat exchange tube can exchange heat with the absorbent in the cooling tank. The second heat exchange tube is located in the electrolyte preheating tank so that the heat exchange medium in the second heat exchange tube can exchange heat with the electrolyte in the electrolyte preheating tank.

[0005] The electrochemical mediated amine regeneration method for capturing CO in the embodiment of the present invention 2 The system uses a heat pump to cool the absorbent and bring heat to the electrolyzer for heating. The absorbent adsorption capacity increases as the temperature decreases. After cooling in the intermediate cooling tank, the adsorption effect can be improved. In addition, the temperature increase of the electrolyzer is conducive to the reduction of electrolysis voltage and CO 2 analysis, saving power consumption.

[0006] In some embodiments, the first circulation pump includes a compressor, and the heat exchange assembly also includes an expansion valve and a refrigerant storage tank, the expansion valve is connected in series between the first heat exchange tube and the second heat exchange tube, and the refrigerant storage tank is connected in series between the expansion valve and the second heat exchange tube.

[0007] In some embodiments, the heat exchange assembly further includes a filter, and the filter is connected in series between the expansion valve and the refrigerant storage tank.

[0008] In some embodiments, the heat exchange component also includes a sensor and a controller, wherein the sensor is connected to the electrolytic cell and electrically connected to the controller, the sensor is used to monitor the temperature inside the electrolytic cell, the controller is electrically connected to the compressor, and the controller is used to control the working state of the compressor.

[0009] In some embodiments, the electrochemical mediated amine regeneration method for capturing CO 2 The system also includes a gas-liquid separator, which is connected in series between the electrolytic cell and the downstream collecting pipe; the gas-liquid separator includes a first feed port, a gas outlet and a liquid outlet, and the electrolytic cell also includes a liquid inlet, the first feed port is connected to the exhaust port, the gas outlet is connected to the downstream collecting pipe, and the liquid outlet is connected to the liquid outlet.

[0010] In some embodiments, the electrochemical mediated amine regeneration method for capturing CO 2 The system also includes a feed tank, which is respectively connected to the upstream feed pipeline, the lower tower body and the electrolyte preheating tank, so that the gas in the upstream feed pipeline passes through the feed tank and then enters the lower tower body, and the absorbent in the lower tower body passes through the feed tank and then enters the electrolyte preheating tank.

[0011] In some embodiments, the electrochemical mediated amine regeneration method for capturing CO 2 The system also includes a second circulation pump, which is connected in series between the feed tank and the electrolyte preheating tank.

[0012] In some embodiments, the electrochemical mediated amine regeneration method for capturing CO 2The system further includes a third circulating pump, which is connected in series between the cooling tank and the lower tower body.

[0013] In some embodiments, the electrochemical mediated amine regeneration method for capturing CO 2 The system also includes:

[0014] A first spraying device, wherein the first spraying device is connected to the upper tower body and communicated with the lean liquid outlet; and / or,

[0015] A second spraying device, wherein the second spraying device is connected to the lower tower body and communicated with the liquid outlet of the cooling tank.

[0016] In some embodiments, the absorption tower also includes a partition plate, which is located between the upper tower body and the lower tower body. At least one gas channel is provided on the partition plate to allow the gas in the lower tower body to pass through the partition plate into the upper tower body, while blocking the absorbent in the upper tower body from flowing into the lower tower body through the partition plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The electrochemical mediated amine regeneration method for capturing CO in the embodiment of the present invention 2 System diagram of the system.

[0018] Reference numerals:

[0019] Absorption tower 1, upper tower body 11, lower tower body 12,

[0020] Cooling tank 2,

[0021] Electrolyte preheating tank 3,

[0022] Electrolytic cell 4, rich liquid inlet 41, lean liquid outlet 42, exhaust port 43, liquid inlet 44,

[0023] Heat exchange assembly 5, first heat exchange tube 51, second heat exchange tube 52, first circulation pump 53, expansion valve 54, refrigerant storage tank 55, filter 56,

[0024] Gas-liquid separator 6, first feed inlet 61, gas outlet 62, liquid outlet 63,

[0025] Feed tank 7,

[0026] The second circulation pump 8,

[0027] The third circulation pump 9. DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0029] The following is combined with Figure 1 The electrochemical mediated amine regeneration method for capturing CO2 according to the embodiment of the present invention is described. 2 system.

[0030] like Figure 1 As shown, the electrochemical mediated amine regeneration method for capturing CO in an embodiment of the present invention 2 The system includes an absorption tower 1, a cooling tank 2, an electrolyte preheating tank 3, an electrolytic cell 4 and a heat exchange component 5. Among them:

[0031] The absorption tower 1 includes an upper tower body 11 and a lower tower body 12; the top of the upper tower body 11 is designed with an interface matching the downstream exhaust pipe so as to be connected with the downstream exhaust pipe for discharging the treated gas; the bottom of the lower tower body 12 is designed with an interface matching the upstream feed pipe so as to be connected with the upstream feed pipe for introducing the CO2-containing gas to be treated. 2 of gas.

[0032] The liquid inlet of the cooling tank 2 is connected to the liquid outlet of the upper tower body 11, and is used to receive the liquid that has absorbed a certain amount of CO flowing out of the upper tower body 11. 2 The liquid outlet of the cooling tank 2 is connected to the liquid inlet of the lower tower body 12. The absorbent in the cooling tank 2 is cooled and its temperature is reduced. The cooled coolant flows into the lower tower body 12 through the liquid outlet of the cooling tank 2 and is reused to continue to absorb CO 2 (The absorbent after absorption is rich liquid). By cooling the absorbent, the absorbent can absorb as much CO as possible in one cycle. 2 , to improve the CO 2 The absorption efficiency is improved and the power consumption of the absorbent cycle is reduced.

[0033] The liquid inlet of the electrolyte preheating tank 3 is connected to the liquid outlet of the lower tower body 12, and is used to receive the absorbent (rich liquid) and preheat it so that the absorbent reaches a temperature suitable for electrolysis, thereby improving the electrolysis efficiency.

[0034] The electrolytic cell 4 includes a rich liquid inlet 41, a lean liquid outlet 42 and an exhaust port 43. The rich liquid inlet 41 is connected to the liquid outlet of the lower tower body 12, the lean liquid outlet 42 is connected to the liquid inlet of the upper tower body 11, and the exhaust port 43 is suitable for connecting to the downstream collection pipeline. In the electrolytic cell 4, the absorbent (rich liquid) is regenerated through an electrochemical process, and CO is released at the same time. 2The regenerated absorbent (lean liquid) flows out through the lean liquid outlet 42 and returns to the upper tower body 11 for reuse. The exhaust port 43 removes the CO generated during the electrolysis process. 2 The gas is discharged into the downstream collection pipeline for treatment.

[0035] The heat exchange assembly 5 includes a first heat exchange tube 51, a second heat exchange tube 52 and a first circulation pump 53 which are connected end to end in sequence. There is heat exchange medium in the first heat exchange tube 51 and the second heat exchange tube 52. The first heat exchange tube 51 is located in the cooling tank 2 so that the heat exchange medium in the first heat exchange tube 51 can exchange heat with the absorbent in the cooling tank 2. The second heat exchange tube 52 is located in the electrolyte preheating tank 3 so that the heat exchange medium in the second heat exchange tube 52 can exchange heat with the electrolyte in the electrolyte preheating tank 3.

[0036] It should be noted that:

[0037] 1. Flow of mixed gas: containing CO 2 The mixed gas enters the lower tower body 12 through the upstream feed pipe and contacts the absorbent entering the lower tower body 12 ; then the mixed gas enters the upper tower body 11 through the lower tower body 12 and contacts the absorbent entering the upper tower body 11 .

[0038] 2. Circulation of absorbent: The absorbent (lean liquid) enters the upper tower body 11 and contacts with the mixed gas in the upper tower body 11 to absorb CO in the mixed gas. 2 Absorbs a certain amount of CO 2 The absorbent (semi-lean liquid) flows into the cooling tank 2 and exchanges heat with the heat exchange medium in the cooling tank 2 to cool down; the cooled absorbent flows into the lower tower body 12 to cool the CO 2 Absorb; absorb CO 2 The absorbed liquid (rich liquid) flows into the electrolyte preheating tank 3 and is heated by heat exchange with the heat exchange medium in the electrolyte preheating tank 3; the heated absorbent enters the electrolytic cell 4 for electrochemical process to be regenerated into lean liquid, and then the lean liquid flows into the upper tower body 11 to complete a cycle.

[0039] 3. Circulation of heat exchange medium: The heat exchange medium in the cooling tank 2 exchanges heat with the absorbent to increase its temperature, and while cooling the absorbent, this part of heat is recovered and stored; the heated absorbent flows into the electrolyte preheating tank 3 to release this part of heat, and the absorbent in the electrolyte preheating tank 3 absorbs the heat to increase its temperature, thereby utilizing this part of heat; the absorbent after releasing the heat flows back into the cooling tank 2 to complete a cycle.

[0040] The electrochemical mediated amine regeneration method for capturing CO in the embodiment of the present invention 2The system uses a heat pump to cool the absorbent and bring heat to the electrolytic cell 4 for heating. The absorbent adsorption amount increases as the temperature decreases. After cooling through the intermediate cooling tank 2, the adsorption effect can be improved. In addition, the heating of the electrolytic cell 4 is beneficial to the reduction of the electrolysis voltage and CO 2 analysis, saving power consumption.

[0041] like Figure 1 As shown, in some embodiments, the first circulation pump 53 includes a compressor, and the heat exchange component 5 also includes an expansion valve 54 and a refrigerant storage tank 55, the expansion valve 54 is connected in series between the first heat exchange tube 51 and the second heat exchange tube 52, and the refrigerant storage tank 55 is connected in series between the expansion valve 54 and the second heat exchange tube 52.

[0042] It should be noted that the compressor is responsible for driving the heat exchange medium to circulate in the heat exchange component 5, and increasing the pressure of the heat exchange medium through the compressor so as to more effectively transfer heat during the heat exchange process; the expansion valve 54 is used to adjust the pressure of the heat exchange medium during the circulation process, so that it can expand and release heat when flowing through the second heat exchange tube 52, thereby improving the preheating effect; the refrigerant storage tank 55 is connected in series between the expansion valve 54 and the second heat exchange tube 52, and is used to store and replenish the heat exchange medium to ensure the continuity and stability of the heat exchange process.

[0043] Therefore, the electrochemical mediated amine regeneration method for capturing CO in the embodiment of the present invention 2 The system can actively cool the absorbent in the cooling tank 2 by setting the compressor, the expansion valve 54 and the refrigerant storage tank 55, further improving the cooling effect of the absorbent in the cooling tank 2, thereby further improving the absorbent's CO 2 Moreover, the absorbent in the electrolyte preheating tank 3 can be actively heated to further improve the control of the temperature in the electrolytic cell 4, which is beneficial to the reduction of the electrolysis voltage and the CO 2 analysis, and is beneficial to saving power consumption.

[0044] like Figure 1 As shown, in some embodiments, the heat exchange component 5 also includes a filter 56, which is connected in series between the expansion valve 54 and the refrigerant storage tank 55, and is used to filter and purify the heat exchange medium, remove impurities and particulate matter therein, prevent these impurities from damaging the heat exchange component 5 and the electrolytic cell 4, and improve the stability and reliability of the system.

[0045] In some embodiments, the heat exchange component 5 also includes a sensor (not shown) and a controller (not shown). The sensor is connected to the electrolytic cell 4 and electrically connected to the controller. The sensor is used to monitor the temperature in the electrolytic cell 4 and transmit the temperature signal to the controller. The controller is electrically connected to the compressor. The controller receives the temperature signal from the sensor and intelligently controls the working state of the compressor according to a preset temperature control strategy. When the temperature in the electrolytic cell 4 is too high or too low, the controller can automatically adjust the operating frequency or start and stop state of the compressor to adjust the circulation speed and pressure of the heat exchange medium, thereby achieving precise control of the temperature of the electrolytic cell 4.

[0046] like Figure 1 As shown, in some embodiments, the electrochemical mediated amine regeneration method is used to capture CO 2 The system further includes a gas-liquid separator 6, which is connected in series between the electrolytic cell 4 and the downstream collecting pipeline; the gas-liquid separator 6 includes a first feed inlet, a gas outlet and a liquid outlet, and the electrolytic cell 4 also includes a liquid inlet 44, the first feed inlet is connected to the exhaust port 43, the gas outlet is connected to the downstream collecting pipeline, and the liquid outlet is connected to the liquid outlet; the gas-liquid separator 6 is used to separate the absorbent (liquid) and CO 2 (Gas) separation, reducing the risk of absorbent entering downstream collection pipes.

[0047] like Figure 1 As shown, in some embodiments, the electrochemical mediated amine regeneration method is used to capture CO 2 The system also includes a feed tank 7, which is respectively connected to an upstream feed pipeline, a lower tower body 12 and an electrolyte preheating tank 3, so that the gas in the upstream feed pipeline passes through the feed tank 7 and then enters the lower tower body 12, and the absorbent in the lower tower body 12 passes through the feed tank 7 and then enters the electrolyte preheating tank 3.

[0048] It should be noted that, through the setting of the feed tank 7, the gas in the upstream feed pipeline passes through the feed tank 7 and then enters the lower tower body 12, and the absorbent in the lower tower body 12 passes through the feed tank 7 and then enters the electrolyte preheating tank 3, thereby reducing the direct contact between the absorbent and the mixed gas in the upstream feed pipeline, thereby reducing the risk of the absorbent backflowing into the upstream feed pipeline.

[0049] like Figure 1 As shown, in some embodiments, the electrochemical mediated amine regeneration method is used to capture CO 2 The system further includes a second circulation pump 8, which is connected in series between the feed tank 7 and the electrolyte preheating tank 3, and is used to drive the absorbent in the feed tank 7 to flow into the electrolyte preheating tank 3 and control the flow rate.

[0050] like Figure 1 As shown, in some embodiments, the electrochemical mediated amine regeneration method is used to capture CO2 The system further includes a third circulation pump 9, which is connected in series between the cooling tank 2 and the lower tower body 12, and is used to drive the absorbent in the cooling tank 2 to flow into the lower tower body 12 and control the flow rate.

[0051] Optionally, for electrochemically mediated amine regeneration to capture CO 2 The system also includes a first spraying device, which is connected to the upper tower body 11 and communicated with the lean liquid outlet 42. The design of the first spraying device enables the absorbent flowing out of the lean liquid outlet 42 to be evenly sprayed in the upper tower body 11 in the form of mist or small droplets, thereby increasing the contact area and contact time between the gas and the absorbent and improving the absorption efficiency.

[0052] Optionally, for electrochemically mediated amine regeneration to capture CO 2 The system also includes a second spraying device, which is connected to the lower tower body 12 and communicated with the liquid outlet of the cooling tank 2. The design of the second spraying device enables the absorbent flowing out of the cooling tank 2 to be evenly sprayed in the lower tower body 12 in a similar manner, thereby increasing the contact area and contact time between the gas and the absorbent and improving the absorption efficiency.

[0053] Preferably, it is used for capturing CO by electrochemical mediated amine regeneration 2 The system also includes a first spraying device and a second spraying device. By setting the first spraying device and the second spraying device at the same time, it is ensured that the first CO2 absorption of the absorbent (the CO2 absorption occurring in the upper tower body 11) and the second CO2 absorption of the absorbent 2 The efficiency of absorption (C02 absorption occurring in the lower tower body 12).

[0054] In some embodiments, the absorption tower 1 further includes a partition plate (not shown), which is located between the upper tower body 11 and the lower tower body 12. At least one gas channel is provided on the partition plate to allow the gas in the lower tower body 12 to pass through the partition plate and enter the upper tower body 11 to avoid affecting the flow of the mixed gas, and at the same time, to prevent the absorbent in the upper tower body 11 from flowing into the lower tower body 12 through the partition plate to avoid the absorbent in the upper tower body 11 from affecting the CO in the lower tower body 12. 2 The gas channel can be circular, square or other shapes to absorb interference, and the specific number and layout are designed according to actual needs.

[0055] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0059] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0060] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A system for capturing CO2 by electrochemical mediated amine regeneration, characterized in that: include: An absorption tower, the absorption tower comprising an upper tower body and a lower tower body, the top of the upper tower body is suitable for communicating with a downstream exhaust pipe, and the bottom of the lower tower body is suitable for communicating with an upstream feed pipe; A cooling tank, wherein the liquid inlet of the cooling tank is connected to the liquid outlet of the upper tower body, and the liquid outlet of the cooling tank is connected to the liquid inlet of the lower tower body; An electrolyte preheating tank, wherein the liquid inlet of the electrolyte preheating tank is connected to the liquid outlet of the lower tower body; An electrolytic cell, the electrolytic cell comprising a rich liquid inlet, a lean liquid outlet and an exhaust port, the rich liquid inlet being connected to the liquid outlet of the lower tower body, the lean liquid outlet being connected to the liquid inlet of the upper tower body, and the exhaust port being adapted to be connected to a downstream collecting pipe; A heat exchange component, the heat exchange component includes a first heat exchange tube, a second heat exchange tube and a first circulation pump which are connected end to end in sequence, the first heat exchange tube and the second heat exchange tube both contain heat exchange medium, the first heat exchange tube is located in the cooling tank so that the heat exchange medium in the first heat exchange tube can exchange heat with the absorbent in the cooling tank, and the second heat exchange tube is located in the electrolyte preheating tank so that the heat exchange medium in the second heat exchange tube can exchange heat with the electrolyte in the electrolyte preheating tank.

2. The system for capturing CO2 by electrochemically mediated amine regeneration according to claim 1, characterized in that: The first circulation pump includes a compressor, and the heat exchange component also includes an expansion valve and a refrigerant storage tank. The expansion valve is connected in series between the first heat exchange tube and the second heat exchange tube, and the refrigerant storage tank is connected in series between the expansion valve and the second heat exchange tube.

3. The system for capturing CO2 by electrochemical mediated amine regeneration according to claim 2, characterized in that: The heat exchange component further includes a filter, and the filter is connected in series between the expansion valve and the refrigerant storage tank.

4. The system for capturing CO2 by electrochemical mediated amine regeneration according to claim 2, characterized in that: The heat exchange component also includes a sensor and a controller. The sensor is connected to the electrolytic cell and electrically connected to the controller. The sensor is used to monitor the temperature in the electrolytic cell. The controller is electrically connected to the compressor and is used to control the working state of the compressor.

5. The system for capturing CO2 by electrochemical mediated amine regeneration according to claim 1, characterized in that: It also includes a gas-liquid separator, which is connected in series between the electrolytic cell and the downstream collection pipeline; The gas-liquid separator includes a first feed port, a gas outlet and a liquid outlet, and the electrolytic cell also includes a liquid inlet. The first feed port is connected to the exhaust port, the gas outlet is connected to the downstream collecting pipe, and the liquid outlet is connected to the liquid outlet.

6. The system for capturing CO2 by electrochemically mediated amine regeneration according to claim 1, characterized in that: It also includes a feed tank, which is respectively connected to the upstream feed pipeline, the lower tower body and the electrolyte preheating tank, so that the gas in the upstream feed pipeline passes through the feed tank and then enters the lower tower body, and the absorbent in the lower tower body passes through the feed tank and then enters the electrolyte preheating tank.

7. The system for capturing CO2 by electrochemically mediated amine regeneration according to claim 6, characterized in that: It also includes a second circulation pump, which is connected in series between the feed tank and the electrolyte preheating tank.

8. The system for capturing CO2 by electrochemical mediated amine regeneration according to claim 1, characterized in that: It also includes a third circulation pump, which is connected in series between the cooling tank and the lower tower body.

9. The system for capturing CO2 by electrochemical mediated amine regeneration according to claim 1, characterized in that: Also includes: A first spraying device, wherein the first spraying device is connected to the upper tower body and communicated with the lean liquid outlet; and / or, A second spraying device, wherein the second spraying device is connected to the lower tower body and communicated with the liquid outlet of the cooling tank.

10. The system for capturing CO2 by electrochemical mediated amine regeneration according to claim 1, characterized in that: The absorption tower also includes a partition plate, which is located between the upper tower body and the lower tower body. At least one gas channel is provided on the partition plate to allow the gas in the lower tower body to pass through the partition plate into the upper tower body, while blocking the absorbent in the upper tower body from flowing into the lower tower body through the partition plate.

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