System for the capture of co2 by electrochemically mediated amine regeneration process

Abstract

The application relates to the technical field of carbon dioxide capture, and particularly discloses a system for capturing CO2 by using an electrochemically mediated amine regeneration method, which comprises an absorption tower, a cooling tank, an electrolyte preheating tank, an electrolytic cell and a heat exchange assembly. The absorption tower comprises an upper tower body and a lower tower body. The liquid inlet and the liquid outlet of the cooling tank are communicated with the liquid outlet of the upper tower body and the liquid inlet of the lower tower body respectively. 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 communicated with the liquid outlet of the lower tower body, a lean-liquid outlet communicated with the liquid inlet of the upper tower body and an exhaust port. The heat exchange assembly comprises first heat exchange pipes, second heat exchange pipes and a first circulating pump which are sequentially connected in a head-to-tail mode. The first heat exchange pipes are located in the cooling tank, and the second heat exchange pipes are located in the electrolyte preheating tank. The system can use a heat pump to lower the temperature of the absorbent and bring heat to the electrolytic cell for heating, thereby improving the adsorption effect and being beneficial to the reduction of electrolysis voltage and the desorption of CO2.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of carbon dioxide capture, in particular to a system for capturing CO2 by electrochemically mediated amine regeneration method. BACKGROUND

[0002] In the technical field of carbon dioxide capture, the electrochemically mediated amine regeneration method regenerates amine solution through an electrochemical process to achieve the capture and separation of CO2, and is widely concerned due to its high efficiency and environmental protection. However, the absorbent releases heat during the absorption of CO2, which leads to an increase in the temperature of the absorbent and further affects its adsorption capacity. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the related art. To this end, an embodiment of the present application proposes a system for capturing CO2 by electrochemically mediated amine regeneration method, which uses a heat pump to cool the absorbent while bringing heat to the electrolytic cell for heating. The adsorption capacity of the absorbent increases with the decrease in temperature, and the adsorption effect can be improved after cooling through an intermediate cooling tank. In addition, the heating of the electrolytic cell is beneficial to the reduction of electrolytic voltage and the desorption of CO2, thereby saving power consumption.

[0004] The system for capturing CO2 by electrochemically mediated amine regeneration method according to an embodiment of the present application comprises an absorption tower, a cooling tank, an electrolyte preheating tank, an electrolytic cell and a heat exchange assembly. The absorption tower comprises an upper tower body and a lower tower body. The top of the upper tower body is adapted to communicate with a downstream exhaust pipeline. The bottom of the lower tower body is adapted to communicate with an upstream feed pipeline. The inlet of the cooling tank communicates with the outlet of the upper tower body. The outlet of the cooling tank communicates with the inlet of the lower tower body. The inlet of the electrolyte preheating tank communicates with the outlet of the lower tower body. The electrolytic cell comprises a rich liquid inlet, a lean liquid outlet and an exhaust port. The rich liquid inlet communicates with the outlet of the lower tower body. The lean liquid outlet communicates with the inlet of the upper tower body. The exhaust port is adapted to communicate with a downstream collection pipeline. The heat exchange assembly comprises a first heat exchange pipe, a second heat exchange pipe and a first circulating pump connected in sequence. Both the first heat exchange pipe and the second heat exchange pipe have a heat exchange medium. The first heat exchange pipe is located in the cooling tank to enable the heat exchange medium in the first heat exchange pipe to exchange heat with the absorbent in the cooling tank. The second heat exchange pipe is located in the electrolyte preheating tank to enable the heat exchange medium in the second heat exchange pipe to exchange heat with the electrolyte in the electrolyte preheating tank.

[0005] The system for capturing CO2 by electrochemically mediated amine regeneration method of the embodiment of the present application can lower the temperature of the absorbent while bringing heat to the electrolytic cell by using a heat pump, the adsorption capacity of the absorbent is increased with the decrease of the temperature, the adsorption effect can be improved after the temperature is lowered by the intermediate cooling tank, and the electrolytic cell is heated, which is beneficial to the decrease of the electrolytic voltage and the desorption of CO2, and the power consumption is saved.

[0006] In some embodiments, the first circulating pump comprises a compressor, the heat exchange assembly further comprises an expansion valve and a refrigerant storage tank, the expansion valve is connected in series between the first heat exchange pipe and the second heat exchange pipe, and the refrigerant storage tank is connected in series between the expansion valve and the second heat exchange pipe.

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

[0008] In some embodiments, the heat exchange assembly further comprises 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 the controller is used to control the working state of the compressor.

[0009] In some embodiments, the system for capturing CO2 by electrochemically mediated amine regeneration method further comprises a gas-liquid separator connected in series between the electrolytic cell and the downstream collection pipeline, the gas-liquid separator comprises a first feed inlet, a gas outlet and a liquid outlet, the electrolytic cell further comprises a liquid inlet, the first feed inlet is in communication with the exhaust port, the gas outlet is in communication with the downstream collection pipeline, and the liquid outlet is in communication with the liquid outlet.

[0010] In some embodiments, the system for capturing CO2 by electrochemically mediated amine regeneration method further comprises a feed tank, the feed tank is in communication with the upstream feed pipeline, the lower tower body and the electrolyte preheating tank respectively, so that the gas in the upstream feed pipeline enters the lower tower body after passing through the feed tank, and the absorbent of the lower tower body enters the electrolyte preheating tank after passing through the feed tank.

[0011] In some embodiments, the system for capturing CO2 by electrochemically mediated amine regeneration method further comprises a second circulating pump connected in series between the feed tank and the electrolyte preheating tank.

[0012] In some embodiments, the system for capturing CO2 by electrochemically mediated amine regeneration method further comprises a third circulating pump connected in series between the cooling tank and the lower tower body.

[0013] In some embodiments, the system for capturing CO2 by electrochemically mediated amine regeneration process further comprises:

[0014] a first spraying device connected in the upper tower body and communicated with the lean liquid outlet; and / or,

[0015] a second spraying device connected in the lower tower body and communicated with the liquid outlet of the cooling tank.

[0016] In some embodiments, the absorption tower further comprises a partition plate between the upper tower body and the lower tower body, and at least one gas passage is arranged 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 DRAWINGS

[0017] Figure 1 is a schematic diagram of a system for capturing CO2 by electrochemically mediated amine regeneration process according to an embodiment of the present application.

[0018] REFERENCE SIGNS

[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 pipe 51, second heat exchange pipe 52, first circulating 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] second circulating pump 8,

[0027] third circulating pump 9. DETAILED DESCRIPTION

[0028] The embodiments of the present application 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 are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0029] The following description of the embodiments of the present application is made with reference to the accompanying drawings. Figure 1This invention describes a system for capturing CO2 using an electrochemically mediated amine regeneration method, according to embodiments of the present invention.

[0030] like Figure 1 As shown, the system for CO2 capture using an electrochemically mediated amine regeneration method according to an embodiment of the present invention includes an absorption tower 1, a cooling tank 2, an electrolyte preheating tank 3, an electrolytic cell 4, and a heat exchange assembly 5. Wherein:

[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 that matches the downstream exhaust pipe so as to connect with the downstream exhaust pipe for discharging the treated gas. The bottom of the lower tower body 12 is designed with an interface that matches the upstream feed pipe so as to connect with the upstream feed pipe for introducing the CO2-containing gas to be treated.

[0032] The inlet of cooling tank 2 is connected to the outlet of the upper tower 11, and is used to receive the absorbent (semi-lean liquid, between rich and lean liquid) that has absorbed a certain amount of CO2 flowing out from the upper tower 11. The outlet of cooling tank 2 is connected to the inlet of the lower tower 12. After the absorbent in cooling tank 2 is cooled, its temperature decreases, and the cooled absorbent flows into the lower tower 12 through the outlet of cooling tank 2 for reuse to continue absorbing CO2 (the absorbent after absorption is rich liquid). By cooling the absorbent, the absorbent can absorb as much CO2 as possible in one absorbent cycle, thereby improving the CO2 absorption efficiency and reducing the power consumption of the absorbent cycle.

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

[0034] 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 12, the lean liquid outlet 42 is connected to the liquid inlet of the upper tower 11, and the exhaust port 43 is adapted to be connected to the downstream collection pipeline. In the electrolytic cell 4, the absorbent (rich liquid) is regenerated through an electrochemical process, releasing CO2 gas at the same time. The regenerated absorbent (lean liquid) flows out through the lean liquid outlet 42 and returns to the upper tower 11 for reuse. The exhaust port 43 discharges the CO2 gas generated during the electrolysis process into the downstream collection pipeline for treatment.

[0035] The heat exchange assembly 5 comprises a first heat exchange pipe 51, a second heat exchange pipe 52 and a first circulating pump 53 connected in sequence, and the first heat exchange pipe 51 and the second heat exchange pipe 52 are filled with heat exchange medium, the first heat exchange pipe 51 is located in the cooling tank 2 to make the heat exchange medium in the first heat exchange pipe 51 exchange heat with the absorbent in the cooling tank 2, and the second heat exchange pipe 52 is located in the electrolyte preheating tank 3 to make the heat exchange medium in the second heat exchange pipe 52 exchange heat with the electrolyte in the electrolyte preheating tank 3.

[0036] It should be noted that:

[0037] 1. The flow of mixed gas: the mixed gas containing CO2 enters the lower tower body 12 through the upstream feed pipeline 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. The circulating flow of absorbent: the absorbent (lean liquid) enters the upper tower body 11 and contacts the mixed gas in the upper tower body 11 to absorb CO2 in the mixed gas; the absorbent (semi-lean liquid) absorbing a certain amount of CO2 flows into the cooling tank 2 and exchanges heat with the heat exchange medium in the cooling tank 2 to be cooled; the cooled absorbent absorbs CO2 in the lower tower body 12; the absorbent (rich liquid) absorbing CO2 flows into the electrolyte preheating tank 3 and exchanges heat with the heat exchange medium in the electrolyte preheating tank 3 to be heated; the heated absorbent enters the electrolytic tank 4 to be regenerated into lean liquid by electrochemical process, and then the lean liquid flows into the upper tower body 11 to complete a cycle.

[0039] 3. The circulating flow of heat exchange medium: the heat exchange medium in the cooling tank 2 exchanges heat with the absorbent to be heated, and the absorbent is cooled at the same time to store the heat; the heated absorbent releases the heat in the electrolyte preheating tank 3, and the absorbent in the electrolyte preheating tank 3 absorbs the heat to be used; the absorbent releasing the heat reflows into the cooling tank 2 to complete a cycle.

[0040] The system for capturing CO2 by electrochemically mediated amine regeneration method in the embodiment of the application can heat the electrolytic tank 4 by using a heat pump to cool the absorbent at the same time, the absorption capacity of the absorbent increases with the decrease of temperature, the absorption effect can be improved after the absorbent is cooled by the intermediate cooling tank 2, and the electrolytic tank 4 is heated to reduce the electrolytic voltage and the desorption of CO2, thereby saving the power consumption.

[0041] As Figure 1As shown, in some embodiments, the first circulating pump 53 comprises a compressor, the heat exchange assembly 5 further comprises an expansion valve 54 and a refrigerant storage tank 55, the expansion valve 54 is connected in series between the first heat exchange pipe 51 and the second heat exchange pipe 52, and the refrigerant storage tank 55 is connected in series between the expansion valve 54 and the second heat exchange pipe 52.

[0042] It should be noted that the compressor is responsible for driving the circulation of the heat exchange medium in the heat exchange assembly 5, and increasing the pressure of the heat exchange medium through the compressor to more effectively transfer heat in the heat exchange process; the expansion valve 54 is used to adjust the pressure of the heat exchange medium in the circulation process, so that it can expand and release heat when flowing through the second heat exchange pipe 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 pipe 52, and is used to store and supplement the heat exchange medium, ensuring the continuity and stability of the heat exchange process.

[0043] Therefore, the system for capturing CO2 by electrochemically mediating amine regeneration method of the embodiment of the present application can actively cool the absorbent in the cooling tank 2 through 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 absorption effect of the absorbent on CO2, and the absorbent in the electrolyte preheating tank 3 can be actively heated to further improve the control of the temperature in the electrolytic tank 4, which is conducive to the reduction of electrolysis voltage and the resolution of CO2, and is conducive to saving power consumption.

[0044] As shown in the figure, Figure 1 In some embodiments, the heat exchange assembly 5 further comprises a filter 56 connected in series between the expansion valve 54 and the refrigerant storage tank 55, which is used to filter and purify the heat exchange medium, remove impurities and particulate matter therein, prevent these impurities from causing damage to the heat exchange assembly 5 and the electrolytic tank 4, and improve the stability and reliability of the system.

[0045] In some embodiments, the heat exchange assembly 5 further comprises a sensor (not shown) and a controller (not shown), the sensor is connected to the electrolytic tank 4 and electrically connected to the controller, the sensor is used to monitor the temperature in the electrolytic tank 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 the preset temperature control strategy; when the temperature in the electrolytic tank 4 is too high or too low, the controller can automatically adjust the working frequency or start-stop state of the compressor to adjust the circulation speed and pressure of the heat exchange medium, thereby realizing accurate control of the temperature of the electrolytic tank 4.

[0046] As shown in the figure, Figure 1As shown, in some embodiments, the system for capturing CO2 using the electrochemically mediated amine regeneration method further includes a gas-liquid separator 6 connected in series between the electrolytic cell 4 and the downstream collection pipeline. The gas-liquid separator 6 includes a first feed inlet, a gas outlet, and a liquid outlet. The electrolytic cell 4 also includes a liquid inlet 44. The first feed inlet is connected to an exhaust port 43, the gas outlet is connected to the downstream collection pipeline, and the liquid outlet is connected to the liquid outlet. The gas-liquid separator 6 is used to separate the absorbent (liquid) and CO2 (gas), reducing the risk of the absorbent entering the downstream collection pipeline.

[0047] like Figure 1 As shown, in some embodiments, the system for capturing CO2 using the electrochemically mediated amine regeneration method further includes a feed tank 7, which is connected to the upstream feed pipe, the lower tower 12, and the electrolyte preheating tank 3, so that the gas in the upstream feed pipe passes through the feed tank 7 and then enters the lower tower 12, and the absorbent in the lower tower 12 passes through the feed tank 7 and then enters the electrolyte preheating tank 3.

[0048] It should be noted that by setting up the feed tank 7, the gas in the upstream feed pipe passes through the feed tank 7 before entering the lower tower 12, and the absorbent in the lower tower 12 passes through the feed tank 7 before entering the electrolyte preheating tank 3. This reduces the direct contact between the absorbent and the mixed gas in the upstream feed pipe, thereby reducing the risk of the absorbent flowing back into the upstream feed pipe.

[0049] like Figure 1 As shown, in some embodiments, the system for capturing CO2 using the electrochemically mediated amine regeneration method further includes a second circulation pump 8, which is connected in series between the feed tank 7 and the electrolyte preheating tank 3, for driving the absorbent in the feed tank 7 to flow into the electrolyte preheating tank 3 and controlling the flow rate.

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

[0051] Optionally, the system for capturing CO2 using the electrochemically mediated amine regeneration method further includes a first spraying device connected inside the upper tower 11 and communicating 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 uniformly sprayed inside the upper tower 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, the system for capturing CO2 by electrochemically mediated amine regeneration method further comprises a second spraying device connected to the lower tower body 12 and in communication with the liquid outlet of the cooling tank 2, and the second spraying device is designed to uniformly spray the absorbent flowing out of the cooling tank 2 in the lower tower body 12 in a similar manner, thereby increasing the contact area and contact time of the gas and the absorbent and improving the absorption efficiency.

[0053] Preferably, the system for capturing CO2 by electrochemically mediated amine regeneration method further comprises a first spraying device and a second spraying device, and the efficiency of the first CO2 absorption of the absorbent (occurring in the upper tower body 11) and the second CO2 absorption of the absorbent (occurring in the lower tower body 12) is ensured by simultaneously providing the first spraying device and the second spraying device.

[0054] In some embodiments, the absorption tower 1 further comprises a partition plate (not shown) located between the upper tower body 11 and the lower tower body 12, and the partition plate is provided with at least one gas passage to allow the gas in the lower tower body 12 to pass through the partition plate into the upper tower body 11, so as to avoid affecting the flow of the mixed gas, while blocking the absorbent in the upper tower body 11 from flowing into the lower tower body 12 through the partition plate, so as to avoid the absorbent in the upper tower body 11 interfering with the CO2 absorption in the lower tower body 12, and the gas passage can be circular, square or other shapes, and the specific number and layout are designed according to actual needs.

[0055] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

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

[0057] In the present application, unless specifically defined otherwise, the terms "mount", "connected", "connecting", "fixed", "unfixed", and the like should be construed broadly and can include fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, or communication connections between each other; direct connections, or indirect connections via an intermediate medium; or internal communication between two elements or interaction between two elements. The specific meanings of the above terms in the present application can be understood by those skilled in the art according to the specific circumstances.

[0058] In the present application, unless specifically defined otherwise, the first feature "on" or "under" the second feature can be direct contact between the first and second features, or indirect contact between the first and second features via an intermediate medium. Moreover, the first feature "above", "over", and "on" the second feature can be directly above or obliquely above the second feature, or simply indicate that the first feature is higher than the second feature in horizontal height. The first feature "below", "under", and "under" the second feature can be directly below or obliquely below the second feature, or simply indicate that the first feature is lower than the second feature in horizontal height.

[0059] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0060] Although the above embodiments have been shown and described, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and changes, modifications, replacements, and variations of the above embodiments made by those skilled in the art are within the scope of the present application.

Claims

1. A system for the capture of CO2 by an electrochemically mediated amine regeneration process, characterized in that, The application relates to a kind of electrolytic apparatuses, comprising: absorption tower, the absorption tower includes upper tower body and lower tower body, the top of the upper tower body is adapted to communicate with downstream exhaust pipe, the bottom of the lower tower body is adapted to communicate with upstream feed pipe; Cooling tank, the liquid inlet of the cooling tank is communicated with the liquid outlet of the upper tower body, and the liquid outlet of the cooling tank is communicated with the liquid inlet of the lower tower body; Electrolyte preheating tank, the liquid inlet of the electrolyte preheating tank is communicated with the liquid outlet of the lower tower body; Electrolytic cell, the electrolytic cell includes rich liquid inlet, poor liquid outlet and exhaust port, the rich liquid inlet is communicated with the electrolyte preheating tank, and the absorption agent after being heated by the electrolyte preheating tank enters the electrolytic cell, the poor liquid outlet is communicated with the liquid inlet of the upper tower body, and the exhaust port is adapted to communicate with downstream collection pipe; Heat exchange assembly, the heat exchange assembly includes first heat exchange pipe, second heat exchange pipe and first circulating pump connected in sequence, the first heat exchange pipe and the second heat exchange pipe are all provided with heat exchange medium, the first heat exchange pipe is located in the cooling tank, so that the heat exchange medium in the first heat exchange pipe exchanges heat with the absorption agent in the cooling tank, and the second heat exchange pipe is located in the electrolyte preheating tank, so that the heat exchange medium in the second heat exchange pipe exchanges heat with the absorption agent in the electrolyte preheating tank.

2. The system for the electrochemically mediated amine regeneration process for CO2 capture of claim 1, wherein, The first circulating pump includes compressor, the heat exchange assembly further includes expansion valve and refrigerant storage tank, the expansion valve is connected between the first heat exchange pipe and the second heat exchange pipe, and the refrigerant storage tank is connected between the expansion valve and the second heat exchange pipe.

3. The system for the electrochemically mediated amine regeneration process for CO2 capture of claim 2, wherein, The heat exchange assembly further includes filter, and the filter is connected between the expansion valve and the refrigerant storage tank.

4. The system for the electrochemically mediated amine regeneration process for CO2 capture of claim 2, wherein, The heat exchange assembly further includes sensor and 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 the controller is used to control the working state of the compressor.

5. The system for the electrochemically mediated amine regeneration process for CO2 capture of claim 1, wherein, Further comprising gas-liquid separator, the gas-liquid separator is connected between the electrolytic cell and the downstream collection pipe; The gas-liquid separator includes first feed port, gas outlet and liquid outlet, and the electrolytic cell further includes liquid inlet, the first feed port is communicated with the exhaust port, the gas outlet is communicated with the downstream collection pipe, and the liquid outlet is communicated with the liquid inlet.

6. The system for the electrochemically mediated amine regeneration process for CO2 capture of claim 1, wherein, Further comprising feed tank, the feed tank is communicated with the upstream feed pipe, the lower tower body and the electrolyte preheating tank respectively, so that the gas in the upstream feed pipe enters the lower tower body through the feed tank, and the absorption agent in the lower tower body enters the electrolyte preheating tank through the feed tank.

7. The system for the electrochemically mediated amine regeneration process for CO2 capture of claim 6, wherein, Further comprising second circulating pump, the second circulating pump is connected between the feed tank and the electrolyte preheating tank.

8. The system for the electrochemically mediated amine regeneration process for CO2 capture of claim 1, wherein, Further comprising third circulating pump, the third circulating pump is connected between the cooling tank and the lower tower body.

9. The system for the electrochemically mediated amine regeneration process for CO2 capture of claim 1, wherein, Further comprising: First spraying device, the first spraying device is connected in the upper tower body and communicated with the poor liquid outlet; and / or, A second spraying device is connected to the lower tower body and communicates with the liquid outlet of the cooling tank.

10. The system for the electrochemically mediated amine regeneration process for CO2 capture of claim 1, wherein, The absorption tower further comprises a partition plate between the upper tower body and the lower tower body, and the partition plate is provided with at least one gas passage to enable 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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