Carbon desorption device based on circular chamber and carbon capture system

Abstract

The utility model provides a carbon desorption device based on a circular chamber and a carbon capture system. The carbon desorption device comprises an electrolytic bath, wherein the electrolytic bath is provided with a bath body, an anode assembly, a cathode assembly and an anion exchange membrane; an anode chamber and a cathode chamber are formed in the tank body, and the anode chamber and the cathode chamber are separated through an anion exchange membrane in a first direction; the chamber sections of the anode chamber and the cathode chamber in the second direction are circular, and the second direction is perpendicular to the first direction; the anode assembly comprises an anode plate, the anode plate is provided with an anode working part, and the anode working part is located in the anode chamber; the cathode assembly comprises a cathode plate, the cathode plate is provided with a cathode working part, and the cathode working part is located in the cathode chamber; the sections of the anode working part and the cathode working part in the second direction are circular; according to the utility model, the effective operation area of the carbon desorption device can be increased, and the defects that more defect points exist on the edge of the electrode plate and material transmission dead angles exist in the inner cavity of the tank body are overcome.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of carbon capture and carbon desorption, and particularly relates to a carbon desorption device based on a circular chamber and a carbon capture system. BACKGROUND

[0002] Carbon dioxide capture is referred to as carbon capture, which includes carbon absorption and carbon desorption. Carbon absorption is usually carried out in a carbon absorption device, which is mainly a carbon absorption tower. In the carbon absorption tower, carbon dioxide is absorbed by a to-be-absorbed liquid containing a carbon absorbent, which can be an organic amine or an inorganic ammonia. During carbon absorption, the carbon absorbent in the to-be-absorbed liquid combines with the incoming carbon dioxide and is converted into a carbon absorption liquid, thereby completing the absorption of carbon dioxide. Carbon desorption is usually carried out in a carbon desorption device, which is mainly a carbon desorption electrolytic cell. The carbon desorption electrolytic cell is divided into an anode chamber and a cathode chamber. The carbon absorption liquid is transported from the carbon absorption device to the anode chamber and undergoes electrolytic desorption in the anode chamber. During electrolytic desorption, the carbon absorbent releases carbon dioxide and combines with metal ions from the anode plate to obtain a desorption liquid. The desorption liquid is transported from the anode chamber to the cathode chamber and undergoes electrodeposition in the cathode chamber. During electrodeposition, the metal ions combined with the carbon absorbent are deposited on the cathode plate to obtain a to-be-absorbed liquid containing the carbon absorbent, thereby regenerating the carbon absorbent. Then, the to-be-absorbed liquid is transported to the carbon absorption device for carbon absorption again.

[0003] A Chinese invention patent with the authorized publication number CN117883974B discloses a modular membrane isolated carbon desorption device, a carbon capture system, a method and an application. The modular membrane isolated carbon desorption device in the patent includes an electrolytic cell, which is divided into multiple electrolytic units by multiple anion exchange membranes. Each electrolytic unit is provided with an electrode, and the polarity of the electrodes in adjacent electrolytic units is opposite. The electrolytic unit with a positive electrode is an anode electrolytic unit, and the electrolytic unit with a negative electrode is a cathode electrolytic unit.

[0004] While the aforementioned patent can reduce heat loss during carbon desorption and achieve double-sided dissolution of the positive electrode and double-sided deposition of the negative electrode, as can be seen from the accompanying drawings, both the tank and the electrode plate are square. This square design results in a smaller effective area and a larger footprint, thus reducing the carbon desorption efficiency per unit volume and affecting production efficiency. Furthermore, during the electrolytic release of CO2, the square electrode plate has numerous defects at its edges, especially at the edges where potential lines are densely distributed, easily leading to dendrite growth and affecting the stable operation of the system. The square tank also has dead zones for material transport, hindering the uniform distribution of the electrolyte, resulting in uneven current distribution at the electrode interface, making it difficult to dissolve or deposit metal ions, and lowering the efficiency of CO2 desorption and absorbent regeneration in the corner areas, thereby affecting a stable and efficient production process. It should be noted that in the existing production process, the square electrode plates in the square tank are usually suspended in the chamber. If it is necessary to avoid the right angles of their edges being exposed in the solution in the chamber, the electrode plates need to be edged. However, edge-wrapping will further reduce the effective area. If edge-wrapping is not performed, the right angles of their edges will be exposed in the solution, which will increase the number of defect points on the edge of the electrode plates.

[0005] In view of this, it is necessary to provide a carbon desorption device and carbon capture system based on a circular chamber to solve or at least alleviate the above-mentioned technical defects such as small effective operating area, many defect points on the edge of the electrode plate, dead corners in the internal cavity of the tank, uneven metal dissolution and deposition, and low efficiency of CO2 desorption and carbon absorbent regeneration in the corner area. Utility Model Content

[0006] The main purpose of this invention is to provide a carbon desorption device and carbon capture system based on a circular chamber, which aims to solve the technical problems mentioned above, such as small effective operating area, many defects at the edge of the electrode plate, dead corners in the internal cavity of the tank, uneven metal dissolution and deposition, and low efficiency of CO2 desorption and carbon absorbent regeneration in the corner areas.

[0007] To achieve the above objectives, this utility model provides a carbon desorption device based on a circular chamber. The carbon desorption device includes an electrolytic cell, which has a cell body, an anode assembly, a cathode assembly, and an anion exchange membrane. An anode chamber and a cathode chamber are formed in the cell body, and the anode chamber and the cathode chamber are separated by the anion exchange membrane in a first direction.

[0008] Both the anode chamber and the cathode chamber have circular cross-sections in the second direction, which is perpendicular to the first direction. The anode chamber has an anode inlet, an anode outlet, and an exhaust outlet. The cathode chamber has a cathode inlet and a cathode outlet.

[0009] The anode assembly comprises an anode plate having an anode working part located in the anode chamber; the cathode assembly comprises a cathode plate having a cathode working part located in the cathode chamber; the cross section of the anode working part and the cathode working part in the second direction is circular.

[0010] Further, the anode chamber and the cathode chamber are multiple; the anode chamber and the cathode chamber are arranged alternately.

[0011] Further, the groove body comprises an anode cylinder segment and a cathode cylinder segment, the anode chamber is formed in the anode cylinder segment, and the cathode chamber is formed in the cathode cylinder segment; the anode cylinder segment, the anion exchange membrane, and the cathode cylinder segment are sequentially stacked in the first direction, and end covers are arranged at both ends of the groove body in the first direction.

[0012] Further, the anode cylinder segment comprises a first anode cylinder body and a second anode cylinder body, the first anode cylinder body, the anode plate, and the second anode cylinder body are sequentially stacked in the first direction, and the anode chamber is divided into a first anode area and a second anode area by the anode plate in the first direction; the anode chamber is provided with the anode liquid inlet, the anode liquid outlet, and the exhaust port in the first anode area and the second anode area for electrolytic extraction.

[0013] The cathode cylinder segment comprises a first cathode cylinder body and a second cathode cylinder body, the first cathode cylinder body, the cathode plate, and the second cathode cylinder body are sequentially stacked in the first direction, and the cathode chamber is divided into a first cathode area and a second cathode area by the cathode plate in the first direction; the cathode chamber is provided with the cathode liquid inlet and the cathode liquid outlet in the first cathode area and the second cathode area for electrodeposition.

[0014] Further, the first anode cylinder body, the second anode cylinder body, the first cathode cylinder body, and the second cathode cylinder body are provided with sealing assemblies at both ends in the first direction.

[0015] Further, the anode liquid outlet comprises an anode overflow port and / or an anode liquid discharge port, and the cathode liquid outlet comprises a cathode overflow port and / or a cathode liquid discharge port; the anode overflow port and the cathode overflow port are both arranged in the upper part of the groove body, and the anode overflow port is lower than the arrangement position of the exhaust port; the anode liquid discharge port and the cathode liquid discharge port are both arranged in the bottom of the groove body.

[0016] Further, the anode liquid inlet and the cathode liquid inlet are arranged in the bottom of the groove body.

[0017] The anode liquid inlet is provided with a liquid dispersing assembly, and / or the upper portion of the anode liquid inlet is provided with a liquid dispersing assembly; the cathode liquid inlet is provided with a liquid dispersing assembly, and / or the upper portion of the cathode liquid inlet is provided with a liquid dispersing assembly.

[0018] Further, the liquid dispersing assembly comprises a liquid dispersing pipe or a liquid dispersing plate.

[0019] When the liquid dispersing assembly comprises the liquid dispersing pipe, the anode liquid inlet and the cathode liquid inlet are each provided with the liquid dispersing pipe and are in communication with the bottom end of the liquid dispersing pipe; the liquid dispersing pipe is located inside the tank body, and the top end of the liquid dispersing pipe is in a sealed state.

[0020] The liquid dispersing pipe has a first side wall, a second side wall, a third side wall and a fourth side wall, the first side wall faces the anion exchange membrane; the first side wall and the second side wall are oppositely arranged, the third side wall and the fourth side wall are oppositely arranged, and the third side wall and the fourth side wall are located between the first side wall and the second side wall; the first side wall, the third side wall and the fourth side wall are each provided with a first liquid dispersing hole.

[0021] When the liquid dispersing assembly comprises the liquid dispersing plate, the upper portion of the anode liquid inlet and the cathode liquid inlet is each provided with the liquid dispersing plate, and the two sides of the liquid dispersing plate in the first direction form a side flow channel.

[0022] Further, when the liquid dispersing assembly comprises the liquid dispersing pipe, the second side wall is not provided with the first liquid dispersing hole.

[0023] When the liquid dispersing assembly comprises the liquid dispersing plate, a plurality of second liquid dispersing holes are formed in the liquid dispersing plate.

[0024] The utility model further provides a kind of carbon capture system, the carbon capture system includes carbon absorption device and as above described any described carbon desorption device;The anode liquid inlet of the carbon desorption device is in communication with the carbon absorption device.

[0025] Compared with prior art, the utility model at least has the following advantages:

[0026] The utility model discloses a carbon desorption device, which can increase the effective operation area of the carbon desorption device, alleviate defects such as the existence of many defect points at the edge of the electrode plate, the existence of material transmission dead angles in the inner cavity of the groove body, uneven metal dissolution and deposition, and low CO2 desorption and carbon absorbent regeneration efficiency in the corner area, and specifically, the circular design in the utility model makes the effective area relatively large, occupies more compact space, and helps to improve the carbon desorption efficiency per unit volume, thereby improving the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the structure shown in these drawings without creative labor.

[0028] Figure 1 It is a structure schematic view of the carbon desorption device in an embodiment of the utility model.

[0029] Figure 2 It is a partial structure schematic view of the first anode cylinder in an embodiment of the utility model.

[0030] Figure 3 It is a partial structure schematic view of the first anode cylinder in an embodiment of the utility model.

[0031] Figure 4 It is a partial structure schematic view of the first anode cylinder in an embodiment of the utility model.

[0032] Figure 5 It is a structure schematic view of the anode assembly in an embodiment of the utility model.

[0033] Reference signs: 1, anode chamber; 2, anode assembly; 3, anode plate; 4, anode conducting part; 5, cathode chamber; 6, cathode assembly; 7, anion exchange membrane; 8, first anode cylinder; 9, second anode cylinder; 10, first cathode cylinder; 11, second cathode cylinder; 12, end cover; 13, sealing groove; 14, anode liquid inlet; 15, anode overflow port; 16, anode liquid outlet; 17, exhaust port; 18, cathode overflow port; 19, anode liquid inlet pipe; 20, anode overflow pipe; 21, exhaust pipe; 22, cathode liquid inlet pipe; 23, cathode overflow pipe; 24, liquid distribution pipe; 25, liquid distribution plate; 26, first liquid distribution hole; 27, second liquid distribution hole.

[0034] The realization, functional features and advantages of the utility model will be further described in combination with the embodiments with reference to the drawings. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0036] It should be noted that all the directional indications (such as up, down, etc.) in the embodiments of the utility model are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0037] In addition, the description of "first", "second" and the like in the utility model is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one feature.

[0038] Moreover, the technical solutions of the various embodiments of the utility model can be combined with each other, but it must be based on the realization by those skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0039] Reference Figures 1-5For better understanding, the utility model provides a kind of carbon desorption device based on circular chamber, the carbon desorption device includes electrolytic cell, the electrolytic cell has tank body, anode assembly 2, cathode assembly 6, anion exchange membrane 7;Anode chamber 1 and cathode chamber 5 are formed in the tank body, the anode chamber 1 and the cathode chamber 5 are separated by the anion exchange membrane 7 and are arranged in the first direction.The first direction is the length direction of the tank body;In working condition, the first direction can be transverse.

[0040] As a preferred embodiment of the utility model, the anode chamber 1 and the cathode chamber 5 are all multiple;The anode chamber 1 and the cathode chamber 5 are alternately arranged, and the anode chamber 1 and the cathode chamber 5 are both provided with the anion exchange membrane 7 and are separated by the anion exchange membrane 7, so as to present the state of modularization membrane isolation;As a specific embodiment, the chamber at both ends of the tank body is the cathode chamber 5.

[0041] The anode chamber 1 and the cathode chamber 5 are both circular in the chamber section (chamber section is inner section) in the second direction (the second direction is perpendicular to the first direction);In working condition, the second direction is longitudinal;Specifically, the anode chamber 1 and the cathode chamber 5 are both cylindrical chambers, and the section of the tank body in the second direction is circular.

[0042] As the description of the anode assembly 2, the anode assembly 2 includes anode plate 3;The anode plate 3 has anode working part, and the anode working part is located in the anode chamber 1;Specifically, in the utility model, the part of the anode plate 3 in the anode chamber 1 is the anode working part.In practical application, the anode assembly 2 further includes anode conductive part 4, and the anode conductive part 4 is electrically connected with the anode plate 3 and can be integrally formed;In some embodiments, the anode plate 3 further includes anode fixed part, and the anode fixed part surrounds the anode working part and is integrally formed with the anode working part.

[0043] Corresponding to the anode assembly 2, the cathode assembly 6 includes cathode plate;The cathode plate has cathode working part, and the cathode working part is located in the cathode chamber 5;Specifically, in the utility model, the part of the cathode plate in the cathode chamber 5 is the cathode working part.In practical application, the cathode assembly 6 further includes cathode conductive part, and the cathode conductive part is electrically connected with the cathode plate and can be integrally formed;In some embodiments, the cathode plate further includes cathode fixed part, and the cathode fixed part surrounds the cathode working part and is integrally formed with the cathode working part.

[0044] The utility model discloses, the cross section of anode working part and cathode working part in second direction is circular, anode working part and cathode working part can be specifically round cake shape, in some specific embodiments, the cross section of anode plate 3 and cathode plate in second direction is circular, and anode plate 3 and cathode plate are round cake shape.

[0045] As the description of the tank, the tank includes an anode cylinder segment and a cathode cylinder segment, that is, the tank is stacked by cylinder segments. The anode chamber 1 is formed in the anode cylinder segment, and the cathode chamber 5 is formed in the cathode cylinder segment; the anode cylinder segment, the anion exchange membrane 7, and the cathode cylinder segment are sequentially stacked in the first direction (the starting end is not limited and can be the anode cylinder segment or the cathode cylinder segment), and end covers 12 are arranged at both ends of the tank in the first direction. Specifically, both ends of the anode chamber 1 are closed by the anion exchange membrane 7, or are closed by the anion exchange membrane 7 and the end cover 12 respectively; both ends of the cathode chamber 5 are closed by the anion exchange membrane 7, or are closed by the anion exchange membrane 7 and the end cover 12 respectively.

[0046] In order to realize the stacked installation and fixation of the electrode plate, the anode cylinder segment includes a first anode cylinder body 8 and a second anode cylinder body 9, both of which are cylindrical; the first anode cylinder body 8, the anode plate 3, and the second anode cylinder body 9 are sequentially stacked in the first direction, and the anode chamber 1 is divided into a first anode region and a second anode region by the anode plate 3 in the first direction. At this time, the anode plate 3 has an anode working part and an anode fixing part, the anode working part and the anode chamber 1 are just matched and located inside the anode chamber 1 (since the cavity cross section of the anode chamber 1 is circular, the anode working part is also circular after stacked installation), and the anode fixing part surrounds the anode working part, is integrally formed with the anode working part, and is used for stacked fixation.

[0047] Corresponding to the anode cylinder segment, the cathode cylinder segment comprises a first cathode cylinder 10 and a second cathode cylinder 11, both of which are cylindrical; the first cathode cylinder 10, the cathode plate, the second cathode cylinder 11 are sequentially stacked in the first direction, and the cathode chamber 5 is divided into a first cathode area and a second cathode area by the cathode plate in the first direction. At this time, the cathode plate has a cathode working part and a cathode fixed part, the cathode working part and the cathode chamber 5 just match and are inside the cathode chamber 5 (since the cavity section of the cathode chamber 5 is circular, after stacked installation, the cathode working part is also circular), and the cathode fixed part surrounds the cathode working part and is integrally formed with the cathode working part and used for stacking and fixing.

[0048] Specifically, in the carbon desorption device, the first cathode cylinder 10, the cathode plate, the second cathode cylinder 11, the anion exchange membrane 7, the first anode cylinder 8, the anode plate 3, and the second anode cylinder 9 are stacked; through the stacked arrangement, the heat dissipation area of the unit cell can be reduced, thereby reducing the heat dissipation amount of the solution; the double-sided working of the electrode plate is promoted, the utilization rate of the electrode plate is improved, and the desorption efficiency is increased; in addition, the regular stacked arrangement is beneficial to the arrangement of auxiliary facilities and facilitates the automatic management.

[0049] It should be understood that when the anode chamber 1 is divided into the first anode area and the second anode area by the anode plate 3 in the first direction, the anode plate 3 is usually slightly larger than the cross-sectional size of the anode chamber 1; when the cathode chamber 5 is divided into the first cathode area and the second cathode area by the cathode plate in the first direction, the cathode plate is usually slightly larger than the cross-sectional size of the cathode chamber 5. In the utility model, after the anode plate 3 is stacked and installed, it is clamped by the first anode cylinder 8 and the second anode cylinder 9, the outer edge of the anode plate 3 is not exposed to the solution in all anode chambers 1, the anode working part inside the anode chamber 1 is circular, the edge has no sharp corners, and the edge has few defects; after the cathode plate is stacked and installed, it is clamped by the first cathode cylinder 10 and the second cathode cylinder 11, the outer edge of the cathode plate is not exposed to the solution in all cathode chambers 5, the cathode working part inside the cathode chamber 5 is circular, the edge has no sharp corners, and the edge has few defects.

[0050] As a further description of the groove body, both ends of the first anode cylinder 8, the second anode cylinder 9, the first cathode cylinder 10 and the second cathode cylinder 11 in the first direction are provided with sealing assemblies; specifically, both ends of the first anode cylinder 8, the second anode cylinder 9, the first cathode cylinder 10 and the second cathode cylinder 11 in the first direction are provided with sealing grooves 13, and sealing rings can be sleeved in the sealing grooves 13, so that the sealing state of the anode chamber 1 and the cathode chamber 5 can be ensured when being stacked and fixed.

[0051] In order to realize the entry and exit of liquid and the collection of carbon dioxide gas in the anode chamber 1 and the cathode chamber 5, the anode chamber 1 is provided with an anode liquid inlet 14, an anode liquid outlet and an exhaust port 17; and the cathode chamber 5 is provided with a cathode liquid inlet and a cathode liquid outlet. Since the anode chamber 1 and the cathode chamber 5 may be subjected to polarity exchange in actual production, the cathode chamber 5 can also be provided with the exhaust port 17, so that the desorbed carbon dioxide can be discharged and collected after the cathode chamber 5 is converted into the anode chamber 1.

[0052] When the anode chamber 1 is divided into the first anode region and the second anode region, the anode chamber 1 is provided with the anode liquid inlet 14, the anode liquid outlet and the exhaust port 17 in the first anode region and the second anode region for electrolysis. When the cathode chamber 5 is divided into the first cathode region and the second cathode region, the cathode chamber 5 is provided with the cathode liquid inlet and the cathode liquid outlet in the first cathode region and the second cathode region for electrodeposition; in order to ensure the operation after polarity exchange in the production process, the cathode chamber 5 can also be provided with the exhaust port 17 in the first cathode region and the second cathode region for electrodeposition, so that it can normally exhaust after being converted into the first anode region and the second anode region for electrolysis. In the utility model, the electrolysis refers to that the carbon absorbent in the carbon absorption liquid releases carbon dioxide in the anode chamber 1 and combines with metal ions from the anode plate 3; the first anode region and the second anode region for electrolysis are regions in the anode chamber 1 that can perform the electrolysis. The electrodeposition refers to that the metal ions combined with the carbon absorbent are deposited on the cathode plate of the cathode chamber to obtain the to-be-absorbed liquid containing the carbon absorbent, so as to realize the regeneration of the carbon absorbent; the first cathode region and the second cathode region for electrodeposition are regions in the cathode chamber 5 that can perform the electrodeposition.

[0053] The carbon desorption device can further comprise an anode liquid inlet pipe 19, an anode liquid outlet pipe, an exhaust pipe 21, a cathode liquid inlet pipe 22, and a cathode liquid outlet pipe; the anode liquid inlet pipe 19 is in communication with the anode chamber 1 through the anode liquid inlet 14, the anode liquid outlet pipe is in communication with the anode chamber 1 through the anode liquid outlet, and the exhaust pipe 21 is in communication with the anode chamber 1 through the exhaust port 17; the cathode liquid inlet pipe 22 is in communication with the cathode chamber 5 through the cathode liquid inlet, and the cathode liquid outlet pipe is in communication with the cathode chamber 5 through the cathode liquid outlet.

[0054] In a specific arrangement, the anode liquid outlet comprises an anode overflow port 15 and / or an anode liquid discharge port 16, and the cathode liquid outlet comprises a cathode overflow port 18 and / or a cathode liquid discharge port; the anode overflow port 15 is arranged at the upper portion of the anode chamber 1, and the cathode overflow port 18 is arranged at the upper portion of the cathode chamber 5; the anode overflow port 15 is arranged lower than the exhaust port 17, and in general, the anode overflow port 15 and the cathode overflow port 18 are both arranged lower than the exhaust port 17; the anode liquid discharge port 16 is arranged at the bottom of the anode chamber 1, and the cathode liquid discharge port is arranged at the bottom of the cathode chamber 5; at this time, the anode liquid outlet pipe comprises an anode overflow pipe 20 and an anode liquid discharge pipe, and the cathode liquid outlet pipe comprises a cathode overflow pipe 23 and a cathode liquid discharge pipe; the anode overflow pipe 20 is in communication with the anode overflow port 15, and the anode liquid discharge pipe is in communication with the anode liquid discharge port 16; the cathode overflow pipe 23 is in communication with the anode overflow port 15, and the cathode liquid discharge pipe is in communication with the cathode liquid discharge port.

[0055] The exhaust port 17 is arranged at the top or upper portion of the anode chamber 1, and can also be arranged at the top or upper portion of the cathode chamber 5; the anode liquid inlet port 14 is arranged at the bottom of the anode chamber 1, and the cathode liquid inlet port is arranged at the bottom of the cathode chamber 5.

[0056] In the utility model, the anode liquid inlet port 14 is used for conveying carbon absorption liquid into the anode chamber 1, and the cathode liquid inlet port is used for conveying desorption liquid into the cathode chamber 5; by arranging the anode overflow port 15 and the cathode overflow port 18 at the upper portions of the anode chamber 1 and the cathode chamber 5, the utility model can overflow and discharge liquid in the working state; the anode overflow port 15 of the utility model is lower than the exhaust port 17, so that an air chamber is formed between the liquid surface and the exhaust port 17; by arranging the liquid discharge port at the bottom, the utility model is convenient for cleaning and maintenance.

[0057] To disperse the carbon absorbent entering the anode chamber 1, the anode inlet 14 is provided with a liquid dispersing component, and / or a liquid dispersing component is provided above the anode inlet 14; to disperse the desorption liquid entering the cathode chamber 5, the cathode inlet is provided with a liquid dispersing component, and / or a liquid dispersing component is provided above the cathode inlet. Further, the liquid dispersing component includes a dispersing pipe 24 or a dispersing plate 25.

[0058] See Figure 2 For illustrative purposes, the liquid dispersing assembly includes or may include the dispersing pipe 24. Both the anode inlet 14 and the cathode inlet are each provided with the dispersing pipe 24, and both are connected to the bottom end of the dispersing pipe 24. The dispersing pipe 24 is located inside the tank, and its top end is sealed. The dispersing pipe 24 has a first sidewall, a second sidewall, a third sidewall, and a fourth sidewall. The first sidewall faces the anion exchange membrane 7, and the first and second sidewalls are opposite each other. The third and fourth sidewalls are opposite each other, and both are located between the first and second sidewalls. Each of the first, third, and fourth sidewalls has a first dispersing hole 26.

[0059] In actual operation, the carbon absorbent flows into the dispersing pipe 24 from the anode inlet 14, and then flows out from the first sidewall, the third sidewall, and the fourth sidewall of the dispersing pipe 24; preferably, the second sidewall does not have the first dispersing hole 26. In some embodiments, in the anode chamber 1, the second sidewall faces the anode plate 3; in the cathode chamber 5, the second sidewall faces the cathode plate; the absence of the first dispersing hole 26 on the second sidewall can reduce the scouring of the electrode plate by the liquid; at this time, the top of the dispersing pipe 24 is closed, and the first dispersing hole 26 is opened on the three sidewalls other than the second sidewall (only the direction facing the electrode plate does not have a liquid hole). While dispersing the liquid, it can reduce the scouring of the electrode plate by the liquid on the one hand, and allow the liquid to scouring the ion exchange membrane on the other hand, avoiding the accumulation of substances on the membrane and causing blockage.

[0060] See Figures 3-4 To illustrate further, the liquid dispersing assembly includes or is the dispersing plate 25. The dispersing plate 25 is installed above both the anode inlet 14 and the cathode inlet, and the dispersing plate 25 has side flow channels on both sides in the first direction to facilitate the lateral dispersion of liquid flow in the chamber. Lateral dispersion can reduce the upward flow velocity of the liquid, and the liquid changes its flow direction after passing through the obstruction. The multi-directional flow makes it easier to agitate the liquid in the tank, so that the material is evenly distributed.

[0061] In a specific operation, after the carbon absorption liquid flows into the anode chamber 1 from the bottom, it is blocked by the liquid dispersion plate 25, and then dispersed in the anode chamber 1 from both sides of the liquid dispersion plate 25. In a specific arrangement, the liquid dispersion plate 25 is only slightly higher than the anode liquid inlet 14, and the liquid dispersion plate 25 is only used to disperse the liquid flow, without affecting the operation of the electrolysis. In a specific operation, after the desorption liquid flows into the cathode chamber 5 from the bottom, it is blocked by the liquid dispersion plate 25, and then dispersed in the cathode chamber 5 from both sides of the liquid dispersion plate 25. In a specific arrangement, the liquid dispersion plate 25 is only slightly higher than the cathode liquid inlet, and the liquid dispersion plate 25 is only used to disperse the liquid flow, without affecting the operation of the electrodeposition. Based on the design of the liquid dispersion plate 25, a plurality of second liquid dispersion holes 27 can be formed in the liquid dispersion plate 25, and the liquid dispersion holes are vertically arranged, so that the liquid flow is dispersed in the vertical direction on the basis of the lateral flow dispersion.

[0062] As a further illustration, in order to enhance the effect of liquid dispersion, and to avoid the pipe mouth water flow carrying the deposited sediment, the anode liquid inlet pipe 19 can slightly extend into the anode chamber 1 from the anode liquid inlet 14 and be located below the liquid dispersion plate 25; the cathode liquid inlet pipe 22 can slightly extend into the cathode chamber 5 from the cathode liquid inlet and be located below the liquid dispersion plate 25.

[0063] It should be noted that in the prior art, the inlet liquid flow also excessively flushes the electrode, resulting in poor electrode dissolution and deposition effect; in the present application, by arranging the liquid dispersion assembly, specifically arranging the liquid dispersion pipe 24 or the liquid dispersion plate 25, the liquid flow is dispersed, which can avoid excessive flushing of the electrode by the inlet liquid flow, thereby avoiding the dissolution of the electrode and the poor deposition effect. The present application can also change the direction of the inlet liquid flow, such as from one direction to multiple directions, and from vertical to horizontal. The multi-directional water flow is beneficial to driving the overall solution flow and promoting the uniform distribution of electrolytes in the solution, thereby improving the electrolysis efficiency. In addition, in the prior art, the bottom liquid flow is easy to carry the sediment (such as anode mud), which is attached to the anion exchange membrane 7 under the action of the electric field, affecting the transmission performance of the anion membrane, thereby affecting the electrochemical desorption efficiency. The present application can also prevent the bottom liquid flow from carrying the sediment (such as anode mud), and avoid its attachment to the anion exchange membrane 7 under the action of the electric field; specifically, the arrangement of the liquid dispersion pipe 24 (top closed) or the liquid dispersion plate 25 greatly reduces the vertical water flow rate, which is beneficial to the deposition of insoluble substances; in addition, the slightly extended bottom liquid inlet pipe effectively avoids the pipe mouth water flow carrying the already deposited sediment, further avoids the sediment from being attached to the membrane under the action of the electric field, thereby avoiding the electrolysis efficiency from being reduced due to the obstruction of the anion channel. Of course, in order to pursue the simplicity of product manufacturing, and to avoid the shielding of the electric potential line, the liquid dispersion pipe 24 or the liquid dispersion plate 25 can also not be arranged.

[0064] The utility model also provides a kind of carbon capture system, the carbon capture system includes carbon absorption device and as above any described carbon desorption device;The anode liquid inlet 14 of the carbon desorption device and the carbon absorption device are communicated and are arranged.

[0065] In the utility model, the operation mode of carbon capture system and carbon desorption device is basically same with prior operation mode, carbon absorption is usually carried out in the carbon absorption device, and the carbon absorption device mainly includes carbon absorption tower, carbon dioxide is absorbed by to-be-absorbed liquid in carbon absorption tower, to-be-absorbed liquid contains carbon absorbent, and carbon absorbent can be organic amine or inorganic ammonia;During carbon absorption, carbon absorbent in to-be-absorbed liquid combines with the carbon dioxide passed in, and is converted into carbon absorption liquid, so as to complete the absorption of carbon dioxide.Carbon desorption is usually carried out in the carbon desorption device, and carbon absorption liquid is transported from the carbon absorption device to the anode chamber 1, and electrolytic desorption occurs in the anode chamber 1;During electrolytic desorption, carbon absorbent releases carbon dioxide, and combines with metal ions from the anode plate 3 to obtain desorption liquid.Desorption liquid is transported from the anode chamber 1 to the cathode chamber 5, and electrodepositing occurs in the cathode chamber 5;During electrodepositing, metal ions combined with carbon absorbent are deposited on the cathode plate to obtain to-be-absorbed liquid containing carbon absorbent, so as to realize the regeneration of carbon absorbent;Then, to-be-absorbed liquid is transported to the carbon absorption device for carbon absorption again.

[0066] It should be noted that, since the cross section of the anode chamber 1 and the cathode chamber 5 in the utility model is circular, and the working part of the anode plate 3 and the cathode plate is also circular, the effective operation area of the carbon desorption device can be increased, and technical defects such as more defect points existing at the edge of the electrode plate, material transmission dead angle existing in the inner cavity of the tank, uneven metal dissolution and deposition, and low CO2 desorption and carbon absorbent regeneration efficiency at the edge area can be alleviated.The utility model can seal and fix the electrolytic tank through the fixing part after stacking installation, or pressurize and fix the electrolytic tank through the way of providing external pressure, such as hydraulic system, pneumatic system or mechanical gear pressure system.The utility model adds the liquid scattering assembly, which can avoid excessive flushing of the electrode plate and increase the dispersibility of effective substances in the liquid.

[0067] In the above technical solution of the utility model, the above is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by using the contents of the utility model specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection range of the utility model.

Claims

1. A carbon desorption apparatus based on a circular chamber, characterized by, The carbon desorption device comprises an electrolytic cell, the electrolytic cell has a cell body, an anode assembly, a cathode assembly, and an anion exchange film; an anode chamber and a cathode chamber are formed in the cell body, and the anode chamber and the cathode chamber are arranged in a first direction and are separated by the anion exchange film; The chamber cross sections of the anode chamber and the cathode chamber in a second direction are circular, the second direction is arranged perpendicularly to the first direction; the anode chamber is provided with an anode liquid inlet, an anode liquid outlet, and an exhaust port; and the cathode chamber is provided with a cathode liquid inlet and a cathode liquid outlet. The anode assembly comprises an anode plate, the anode plate has an anode working part, and the anode working part is located in the anode chamber; the cathode assembly comprises a cathode plate, the cathode plate has a cathode working part, and the cathode working part is located in the cathode chamber; the cross sections of the anode working part and the cathode working part in the second direction are circular.

2. The circular chamber based carbon desorption apparatus of claim 1, wherein, The anode chamber and the cathode chamber are multiple; and the anode chamber and the cathode chamber are arranged alternately.

3. The circular chamber based carbon desorption apparatus of claim 1, wherein, The cell body comprises an anode cylinder segment and a cathode cylinder segment, the anode chamber is formed in the anode cylinder segment, and the cathode chamber is formed in the cathode cylinder segment; the anode cylinder segment, the anion exchange film, and the cathode cylinder segment are arranged in the first direction in sequence, and end covers are arranged at both ends of the cell body in the first direction.

4. The circular chamber based carbon desorption apparatus of claim 3, wherein, The anode cylinder segment comprises a first anode cylinder body and a second anode cylinder body, the first anode cylinder body, the anode plate, and the second anode cylinder body are arranged in the first direction in sequence, the anode chamber is divided into a first anode area and a second anode area in the first direction by the anode plate, and the anode chamber is provided with the anode liquid inlet, the anode liquid outlet, and the exhaust port in the first anode area and the second anode area for electrolytic desorption; The cathode cylinder segment comprises a first cathode cylinder body and a second cathode cylinder body, the first cathode cylinder body, the cathode plate, and the second cathode cylinder body are arranged in the first direction in sequence, the cathode chamber is divided into a first cathode area and a second cathode area in the first direction by the cathode plate, and the cathode chamber is provided with the cathode liquid inlet and the cathode liquid outlet in the first cathode area and the second cathode area for electrodeposition.

5. The circular chamber based carbon desorption apparatus of claim 4, wherein, Sealing assemblies are arranged at both ends of the first anode cylinder body, the second anode cylinder body, the first cathode cylinder body, and the second cathode cylinder body in the first direction.

6. The circular chamber based carbon desorption apparatus of claim 1, wherein, The anode liquid outlet comprises an anode overflow port and / or an anode liquid discharge port, the cathode liquid outlet comprises a cathode overflow port and / or a cathode liquid discharge port, the anode overflow port and the cathode overflow port are arranged at the upper part of the cell body, the anode overflow port is arranged lower than the exhaust port, and the anode liquid discharge port and the cathode liquid discharge port are arranged at the bottom of the cell body.

7. The circular chamber based carbon desorption apparatus according to any one of claims 1 to 6, wherein The anode liquid inlet and the cathode liquid inlet are arranged at the bottom of the cell body; The anode liquid inlet is provided with a liquid dispersing assembly, and / or a liquid dispersing assembly is arranged above the anode liquid inlet; the cathode liquid inlet is provided with a liquid dispersing assembly, and / or a liquid dispersing assembly is arranged above the cathode liquid inlet.

8. The circular chamber based carbon desorption apparatus of claim 7, wherein, The liquid dispersing assembly comprises a liquid dispersing pipe or a liquid dispersing plate; When the liquid dispersing assembly comprises the liquid dispersing pipe, the anode liquid inlet and the cathode liquid inlet are each provided with the liquid dispersing pipe and are in communication with the bottom end of the liquid dispersing pipe; the liquid dispersing pipe is located inside the tank body, and the top end of the liquid dispersing pipe is in a sealed state; The liquid dispersing pipe has a first side wall, a second side wall, a third side wall and a fourth side wall; the first side wall is towards the anion exchange membrane; the first side wall and the second side wall are oppositely arranged, the third side wall and the fourth side wall are oppositely arranged, and the third side wall and the fourth side wall are located between the first side wall and the second side wall; the first side wall, the third side wall and the fourth side wall are each provided with a first liquid dispersing hole; When the liquid dispersing assembly comprises the liquid dispersing plate, the liquid dispersing plate is installed above the anode liquid inlet and the cathode liquid inlet, and side flow channels are formed on both sides of the liquid dispersing plate in the first direction.

9. The circular chamber based carbon desorption apparatus of claim 8, wherein, When the liquid dispersing assembly comprises the liquid dispersing pipe, the second side wall is not provided with the first liquid dispersing hole; When the liquid dispersing assembly comprises the liquid dispersing plate, a plurality of second liquid dispersing holes are formed on the liquid dispersing plate.

10. A carbon capture system characterized by, The carbon capture system comprises a carbon absorbing device and a carbon desorbing device according to any one of claims 1-9; the anode liquid inlet of the carbon desorbing device is in communication with the carbon absorbing device.

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