Modularized carbon desorption device and carbon capture system
By setting up an intermediate partition plate in the carbon desorption device to form independent units and combining liquid circuits and circuit components, the technical problem of improving electrolytic efficiency of carbon desorption device arrangement is solved, and more efficient carbon dioxide desorption and cost reduction effects are achieved.
Patent Information
- Application Number
- CN202420509509.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-15
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-03-15
AI Technical Summary
The prior art has not clarified how to improve the electrolytic efficiency during the carbon desorption process through the arrangement of carbon desorption devices, resulting in low carbon dioxide desorption efficiency.
A modular carbon desorption device is designed, by setting up a middle spacer in the carbon desorption tank to form a plurality of independent carbon desorption units, and anode plate, cathode plate and anion exchange membrane are arranged in each unit to combine with the liquid circuit. Components and circuit components realize integrated liquid delivery and electrolysis processes, reducing heat loss and temperature instability.
The electrolytic efficiency of the carbon desorption process is improved, heat loss and material cost are reduced, site occupancy is reduced, and the solution temperature is stabilized through temperature difference and independent operating units.
Smart Images
Figure CN222219112U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of carbon dioxide recovery, and specifically relates to a modular carbon desorption device and a carbon capture system. Background Art
[0002] In order to achieve continuous carbon capture of carbon dioxide in flue gas, a Chinese invention patent with authorization announcement number CN113578025B (the previous case of the inventor of the present application) discloses a method and system for capturing carbon dioxide in flue gas, comprising the steps of: conveying flue gas containing carbon dioxide to an absorption device for absorbing carbon dioxide to obtain an absorption liquid and a purified gas; conveying the absorption liquid to the anode chamber of an electrolytic desorption device for desorption to obtain a gas-liquid mixture containing a metal / ammonia coordination compound and carbon dioxide; performing gas-liquid separation treatment on the gas-liquid mixture to obtain carbon dioxide gas and a separation liquid; conveying the separation liquid to the cathode chamber of the electrolytic desorption device, causing the separation liquid to undergo electrodeposition in the cathode chamber to obtain deposited metal and an ammonia-containing solution; conveying the ammonia-containing solution to the absorption device for absorbing carbon dioxide again.
[0003] In order to achieve intermittent carbon capture of carbon dioxide in flue gas, a Chinese invention patent application with publication number CN115970447A (a previous case of the inventor of the present application) discloses a carbon desorption method, comprising: performing a first electrolysis on a liquid content in a first chamber and a liquid content in a second chamber, the liquid content in the first chamber comprising one of a carbon absorption liquid and a decarbonization liquid, and the liquid content in the second chamber comprising the other of the carbon absorption liquid and the decarbonization liquid; adjusting the liquid content in the first chamber and / or the second chamber; performing a second electrolysis on the liquid content in the first chamber and the liquid content in the second chamber, the liquid content in the first chamber comprising one of a carbon absorption liquid and a desorption liquid, and the liquid content in the second chamber comprising the other of the carbon absorption liquid and the desorption liquid; during the first electrolysis and the second electrolysis, confining the liquid content in the first chamber and the second chamber in their respective chambers.
[0004] Although the above-mentioned prior art can achieve carbon dioxide capture in a continuous or intermittent manner, the Chinese invention patent with the authorization announcement number CN113578025B does not specify how to improve the electrolysis efficiency in the carbon desorption process by arranging the carbon desorption device (electrodesorption device). Although the Chinese invention patent application with the publication number CN115970447A shows multiple carbon desorption devices (see the attached drawings of its specification), it also does not specify how to improve the electrolysis efficiency in the carbon desorption process by arranging the carbon desorption devices.
[0005] In view of this, it is necessary to provide a modular carbon desorption device and a carbon capture system to solve or at least alleviate the technical defect in the above-mentioned prior art that it is not clear how to improve the electrolysis efficiency by arranging the carbon desorption device. Utility Model Content
[0006] The main purpose of the utility model is to provide a modular carbon desorption device and a carbon capture system, aiming to solve the technical problem in the above-mentioned prior art that it is not clear how to improve the electrolysis efficiency by arranging the carbon desorption device, thereby further improving the electrolysis efficiency of carbon dioxide in the carbon desorption process.
[0007] To achieve the above object, the utility model provides a modular carbon desorption device, comprising a carbon desorption assembly and a liquid circuit assembly; the carbon desorption assembly comprises at least one carbon desorption tank, a cover body is installed on the top of the carbon desorption tank; at least one middle partition is provided in the carbon desorption tank, and the carbon desorption tank is divided into a plurality of carbon desorption units by the at least one middle partition;
[0008] The carbon desorption unit is provided with an anode plate, a cathode plate and an anion exchange membrane, and the anode plate and the cathode plate in the same carbon desorption unit are separated by the anion exchange membrane to form an anode chamber and a cathode chamber in the same carbon desorption unit;
[0009] The liquid circuit assembly includes an anode chamber liquid inlet pipe, an anode chamber liquid outlet pipe, a cathode chamber liquid inlet pipe and a cathode chamber liquid outlet pipe; the liquid inlet of the anode chamber is connected to the anode chamber liquid inlet pipe, the liquid outlet of the anode chamber is connected to the anode chamber liquid outlet pipe, the liquid inlet of the cathode chamber is connected to the cathode chamber liquid inlet pipe, and the liquid outlet of the cathode chamber is connected to the cathode chamber liquid outlet pipe.
[0010] Furthermore, a gas collecting port is provided at the top or upper portion of the anode chamber; the modular carbon desorption device also includes a gas collecting pipeline, and the gas collecting pipeline is connected to the gas collecting port.
[0011] Furthermore, the drain port of the anode chamber is located at the lower part or bottom of the anode chamber, and the drain port of the anode chamber is connected to the anode chamber outlet pipe; the drain port of the cathode chamber is located at the lower part or bottom of the cathode chamber, and the drain port of the cathode chamber is connected to the cathode chamber outlet pipe.
[0012] Furthermore, the liquid circuit assembly also includes an anode chamber circulation pipeline and a cathode chamber circulation pipeline, the liquid inlet end and the liquid outlet end of the anode chamber circulation pipeline are both connected to the same anode chamber, and the liquid inlet end and the liquid outlet end of the cathode chamber circulation pipeline are both connected to the same cathode chamber.
[0013] Furthermore, the modular carbon desorption device also includes a desorption liquid transfer tank; the anode chamber liquid outlet pipe and the liquid inlet of the desorption liquid transfer tank are connected, and the cathode chamber liquid inlet pipe and the liquid outlet of the desorption liquid transfer tank are connected.
[0014] Furthermore, the liquid outlet of the anode chamber is located at the upper part of the anode chamber, and the liquid outlet of the cathode chamber is located at the upper part of the cathode chamber.
[0015] Furthermore, the modular carbon desorption device also includes a gas-liquid separation mechanism, the liquid inlet of the gas-liquid separation mechanism is connected to the anode chamber liquid outlet pipeline, and the liquid outlet of the gas-liquid separation mechanism is connected to the cathode chamber liquid inlet pipeline.
[0016] Furthermore, the liquid inlet of the anode chamber is located at the lower part of the anode chamber, and the liquid inlet of the cathode chamber is located at the lower part of the cathode chamber; and the liquid inlet and liquid outlet in the same anode chamber are arranged opposite to each other, and the liquid inlet and liquid outlet in the same cathode chamber are arranged opposite to each other.
[0017] Furthermore, the carbon desorption units in the carbon desorption tank are arranged in sequence along the same direction;
[0018] The modular carbon desorption device also includes a circuit component, which includes an anode conductive row and a cathode conductive row; each of the anode plates in the carbon desorption cell is electrically connected to the same anode conductive row, and each of the cathode plates in the carbon desorption cell is electrically connected to the same cathode conductive row.
[0019] The present invention also provides a carbon capture system, the carbon capture system comprising a carbon absorption device and a modular carbon desorption device as described above;
[0020] The carbon absorption device has a carbon absorption liquid discharge port and a liquid receiving port for absorption. The carbon absorption liquid discharge port is connected to the anode chamber liquid inlet pipeline, and the liquid receiving port for absorption is connected to the cathode chamber liquid outlet pipeline.
[0021] Compared with the prior art, the utility model has at least the following advantages:
[0022] The utility model can reduce the heat loss during the carbon desorption process and improve the electrolysis efficiency during the carbon desorption process. Specifically, the utility model sets at least one middle partition in the carbon desorption tank, thereby forming a plurality of carbon desorption units adjacent to each other in sequence; and the carbon desorption unit is provided with an anode plate, an anion exchange membrane and a cathode plate, so that each carbon desorption unit can perform carbon desorption relatively independently. In this way, while ensuring the normal development of carbon desorption, the heat dissipation area is reduced and the heat loss of the solution is reduced; and the temperature difference between the carbon desorption units can be compensated, so that the temperature change of the solution in each carbon desorption unit is more stable, thereby improving the electrolysis efficiency.
[0023] In addition, the utility model can carry out integrated liquid transportation and discharge in each anode chamber and each cathode chamber by arranging the anode chamber liquid inlet pipe, the anode chamber liquid outlet pipe, the cathode chamber liquid inlet pipe and the cathode chamber liquid outlet pipe, thereby ensuring the operation of the carbon desorption device and avoiding the situation where the pipeline is complicated or cannot be operated effectively due to the arrangement of multiple carbon desorption units; since the utility model integrates multiple carbon desorption units into the same carbon desorption tank, the utility model also reduces the site occupation area and material costs, and reduces the transportation paths of circuits and liquid circuits. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0025] Figure 1 This is a schematic structural diagram of a modular carbon desorption device in one embodiment of the utility model;
[0026] Figure 2 This is a schematic structural diagram of a carbon desorption tank in one embodiment of the utility model;
[0027] Figure 3 It is a schematic diagram of the relative relationship between the carbon desorption tank and the circuit components in one embodiment of the utility model.
[0028] Figure numerals: 1, carbon desorption tank; 2, middle partition; 3, carbon desorption unit; 4, anode plate; 5, cathode plate; 6, anion exchange membrane; 7, anode chamber liquid inlet pipe; 8, anode chamber liquid outlet pipe; 9, cathode chamber liquid inlet pipe; 10, cathode chamber liquid outlet pipe; 11, anode conductive bar; 12, cathode conductive bar.
[0029] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0030] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0031] Furthermore, the technical solutions between the various implementation modes of the present invention may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in the field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0032] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number and order of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.
[0033] The "carbon capture" involved in the present utility model includes carbon absorption and carbon desorption. Carbon absorption means that after carbon dioxide is absorbed by the liquid to be absorbed (containing carbon adsorbent) in the carbon absorption device, a carbon absorption liquid (carbon adsorbent and carbon dioxide are coordinated and combined) is generated. Carbon desorption means that the carbon absorption liquid undergoes an electrolytic desorption reaction in the anode chamber of the carbon desorption device, thereby releasing carbon dioxide in the anode chamber and converting it into a desorption liquid (carbon adsorbent and metal ions are coordinated and combined); at the same time, the desorption liquid (which may be derived from the electrolysis before the anode chamber) undergoes an electrodeposition reaction in the cathode chamber to obtain a liquid to be absorbed. The "carbon" involved in the present utility model refers to carbon dioxide. Since the present utility model involves liquid transportation, in order to achieve liquid transportation, those skilled in the art may selectively set a delivery pump in the corresponding pipeline.
[0034] It should be pointed out that, taking the Chinese invention patent application with publication number CN115970447A as an example, each carbon desorption device tank is relatively independent, which not only increases the site area, but also causes the heat loss in the carbon dioxide desorption process to be faster, resulting in a decrease in the electrolysis efficiency of carbon dioxide desorption, affecting the capture of carbon dioxide; in addition, when the carbon desorption device is intermittently operated, since the electrode reaction is limited by concentration polarization, the rate is low, the overpotential is high, and the energy consumption is high, it is usually necessary to configure a pipeline for solution circulation in each chamber, but the circulation of the solution will accelerate the heat dissipation, thereby resulting in a decrease in the electrolysis efficiency in the carbon dioxide desorption process.
[0035] To improve the electrolysis efficiency during carbon desorption, see Figure 1-3 As shown, the utility model provides a modular carbon desorption device, including a carbon desorption assembly and a liquid circuit assembly; the carbon desorption assembly includes at least one carbon desorption tank 1, and a cover is installed on the top of the carbon desorption tank 1. At least one middle partition 2 is provided in the carbon desorption tank 1, and the carbon desorption tank 1 is divided into a plurality of carbon desorption units 3 by the at least one middle partition 2.
[0036] It should be noted that in industrial practice, there may be multiple carbon desorption tanks 1, and each of the carbon desorption tanks 1 is divided into multiple carbon desorption units 3 by at least one intermediate partition 2; that is, the intermediate partition 2 is sealed and connected to the inner wall of the carbon desorption tank 1 and the bottom surface of the cover at the same time. Among them, the carbon desorption units 3 in the same carbon desorption tank 1 can be arranged in sequence along the same direction; specifically, the carbon desorption units 3 in the same carbon desorption tank 1 can be arranged in sequence along the length direction of the carbon desorption tank 1.
[0037] The utility model converts the carbon desorption device into a plurality of mutually separated carbon desorption units 3, thereby ensuring the independent operation of the carbon desorption units 3, reducing the heat loss in the carbon desorption process, and making temperature compensation between the carbon desorption units 3, so that the temperature change of the solution in each carbon desorption unit 3 is more stable, thereby avoiding the reduction of electrolysis efficiency; moreover, accommodating the plurality of carbon desorption units 3 in the same electrolytic cell can also reduce the occupied area of the site.
[0038] As an explanation of the carbon desorption unit 3, the carbon desorption unit 3 is provided with an anode plate 4, a cathode plate 5 and an anion exchange membrane 6, and the anode plate 4 and the cathode plate 5 both contain transition metal elements, which are metal elements that can be combined with an adsorbent, and specifically can include or be one or more of zinc, copper, nickel, and silver; the anode plate 4 and the cathode plate 5 in the same carbon desorption unit 3 are separated by the anion exchange membrane 6 to form an anode chamber and a cathode chamber in the same carbon desorption unit 3, and the anode chamber and the cathode chamber are separated by the anion exchange membrane 6. In the same carbon desorption tank 1, the anode plate 4 and the cathode plate 5 can be arranged alternately.
[0039] It should be understood that the anode chamber is filled with carbon absorption liquid, and the carbon absorption liquid can come from a carbon absorption device, and the carbon absorption device can be a carbon absorption tower; the carbon absorption liquid is a liquid obtained after the absorption liquid absorbs carbon dioxide, and the absorption liquid contains a carbon adsorbent, and the carbon adsorbent can include or be one or more of inorganic ammonia NH3 and organic amines; in the carbon absorption liquid, the carbon adsorbent and carbon dioxide are coordinated and combined; when the carbon absorption liquid is electrolyzed in the anode chamber, the transition metal elements released in the anode plate 4 will coordinate and combine with the carbon adsorbent in the carbon absorption liquid, so that the carbon dioxide gas in the carbon absorption liquid can be released.
[0040] After the electrolysis of the carbon absorption liquid in the anode chamber is completed, the carbon absorption liquid will be converted into a desorption liquid due to the desorption and release of carbon dioxide; in the desorption liquid, the carbon adsorbent and the transition metal element are coordinated and combined. The cathode chamber is filled with a desorption liquid; since the electrolysis of the anode chamber and the cathode chamber is carried out simultaneously, the desorption liquid in the cathode chamber is usually generated by the anode chamber during the last electrolysis; when the desorption liquid is electrolyzed in the cathode chamber, the transition metal element in the desorption liquid will be electrodeposited, thereby depositing the transition metal element on the cathode plate 5, and obtaining the liquid to be absorbed containing the carbon adsorbent.
[0041] As an illustration of the liquid circuit assembly, the liquid circuit assembly includes an anode chamber liquid inlet pipe 7, an anode chamber liquid outlet pipe 8, a cathode chamber liquid inlet pipe 9 and a cathode chamber liquid outlet pipe 10. The liquid inlet of the anode chamber is connected to the anode chamber liquid inlet pipe 7, the liquid outlet of the anode chamber is connected to the anode chamber liquid outlet pipe 8, the liquid inlet of the cathode chamber is connected to the cathode chamber liquid inlet pipe 9, and the liquid outlet of the cathode chamber is connected to the cathode chamber liquid outlet pipe 10. Specifically, each of the anode chambers in the same electrolytic cell can be connected to the same anode chamber liquid inlet pipe 7, each of the anode chambers in the same electrolytic cell can be connected to the same anode chamber liquid outlet pipe 8, each of the cathode chambers in the same electrolytic cell can be connected to the same cathode chamber liquid inlet pipe 9, and each of the cathode chambers in the same electrolytic cell can be connected to the same cathode chamber liquid outlet pipe 10.
[0042] Exemplarily, when the polarity of the anode chamber and the cathode chamber does not change, the anode chamber liquid inlet pipe 7 is used to transport the carbon absorption liquid to the anode chamber, the anode chamber liquid outlet pipe 8 is used to discharge the desorption liquid generated in the anode chamber, the cathode chamber liquid inlet pipe 9 is used to transport the desorption liquid to the cathode chamber, and the cathode chamber liquid outlet pipe 10 is used to discharge the liquid to be absorbed generated in the cathode.
[0043] It should be emphasized that, as an illustration of the above technical solution, in the field, the carbon desorption device can be operated intermittently or continuously; when the intermittent operation mode is adopted, the technical personnel in this field know that there will be a corresponding gas collecting port in the anode chamber to discharge and collect the carbon dioxide gas generated in the anode chamber during the intermittent operation; when the continuous operation mode is adopted, the carbon dioxide gas needs to be discharged together with the desorption liquid, so the gas collecting port can be selectively not set.
[0044] As an explanation of the intermittent type, in order to make the carbon desorption device more suitable for the intermittent operation mode, the top or upper part of the anode chamber is provided with the gas collecting port, and the gas collecting port can usually be opened on the cover body; the modular carbon desorption device also includes a gas collecting pipe, and the gas collecting pipe and the gas collecting port are connected to collect the carbon dioxide gas released by desorption in the anode chamber.
[0045] In order to facilitate the drainage operation of the anode chamber and the cathode chamber after the electrolysis is completed, the anode chamber and the cathode chamber may not only have a liquid inlet and a liquid outlet, but also have a liquid drain; when the carbon desorption device is in intermittent operation, the liquid drain may also be equivalent to the liquid outlet of the anode chamber and the cathode chamber. The liquid drain of the anode chamber is located at the lower part or bottom of the anode chamber, preferably at the bottom; the liquid drain of the cathode chamber is located at the lower part or bottom of the cathode chamber, preferably at the bottom; the solution in the anode chamber and the cathode chamber can be emptied through the liquid drain; the liquid drain of the anode chamber can be connected to the anode chamber liquid outlet pipe, and the liquid drain of the cathode chamber can be connected to the cathode chamber liquid outlet pipe. When the carbon desorption device is in intermittent operation, there is no specific requirement for the liquid inlet of the anode chamber and the cathode chamber; as a conventional option, the liquid inlet of the anode chamber can be located at the upper part or lower part of the anode chamber, and the liquid inlet of the cathode chamber can be located at the upper part and lower part of the cathode chamber.
[0046] In order to promote the flow of solution in the anode chamber and the cathode chamber, the liquid path assembly may further include an anode chamber circulation pipe and a cathode chamber circulation pipe, the liquid inlet end and the liquid outlet end of the anode chamber circulation pipe are both connected to the same anode chamber, and the liquid inlet end and the liquid outlet end of the cathode chamber circulation pipe are both connected to the same cathode chamber; the anode chamber circulation pipe and the cathode chamber circulation pipe may be equipped with a delivery pump.
[0047] In order to allow the desorption liquid generated in the anode chamber to be intermittently transported to the cathode chamber, the modular carbon desorption device may further include a desorption liquid transfer tank; the anode chamber liquid outlet pipe 8 is connected to the liquid inlet of the desorption liquid transfer tank, and the cathode chamber liquid inlet pipe 9 is connected to the liquid outlet of the desorption liquid transfer tank. Generally, the carbon desorption device may further include a transfer tank for the liquid to be absorbed, so as to timely discharge the liquid to be absorbed generated in the cathode chamber; therefore, the cathode chamber liquid outlet pipe 10 may be connected to the liquid inlet of the transfer tank for the liquid to be absorbed.
[0048] In order to ensure the current supply in the anode chamber and the cathode chamber, see Figure 1 and Figure 3As shown, the modular carbon desorption device may further include a circuit assembly, the circuit assembly including an anode conductive bar 11 and a cathode conductive bar 12; each of the anode plates 4 in the carbon desorption tank 1 is electrically connected to the same anode conductive bar 11, and each of the cathode plates 5 in the carbon desorption tank 1 is electrically connected to the same cathode conductive bar 12. Of course, the anode conductive bar 11 and the cathode conductive bar 12 need to be electrically connected to a power source.
[0049] In the present invention, a cycle process of the intermittent working mode can be:
[0050] The carbon absorption liquid is provided to each anode chamber of the electrolytic cell from the anode chamber liquid inlet pipe 7, and the desorption liquid is provided to each cathode chamber of the electrolytic cell from the cathode chamber liquid inlet pipe 9. Then, the first electrolysis is performed on each anode chamber and each cathode chamber at the same time; during the electrolysis process, the carbon dioxide gas generated in the anode chamber is collected from the gas collecting port; after the electrolysis is completed, the carbon absorption liquid in the anode chamber is converted into the desorption liquid, and the desorption liquid in the cathode chamber is converted into the liquid to be absorbed.
[0051] The desorption liquid generated in the anode chamber is transported to the desorption liquid transfer tank through the anode chamber outlet pipe 8, and the liquid to be absorbed generated in the cathode chamber is discharged through the cathode chamber outlet pipe 10 (can be discharged to the liquid to be absorbed transfer tank).
[0052] The carbon absorption liquid is continuously provided to each anode chamber of the electrolytic cell from the anode chamber liquid inlet pipe 7, and the desorption liquid in the desorption liquid transfer tank is transported to each cathode chamber of the electrolytic cell from the cathode chamber liquid inlet pipe 9. Then, the second electrolysis is performed on each anode chamber and each cathode chamber at the same time; during the electrolysis process, the carbon dioxide gas generated in the anode chamber is collected from the gas collecting port; after the electrolysis is completed, the carbon absorption liquid in the anode chamber is converted into the desorption liquid, and the desorption liquid in the cathode chamber (derived from the carbon absorption liquid in the previous electrolysis) is converted into the liquid to be absorbed.
[0053] The desorption liquid generated in the anode chamber is transported to the desorption liquid transfer tank through the anode chamber outlet pipe 8, and the liquid to be absorbed generated in the cathode chamber is discharged through the cathode chamber outlet pipe 10 (can be discharged to the liquid to be absorbed transfer tank), thereby completing an intermittent cycle process of converting the carbon absorption liquid into the liquid to be absorbed.
[0054] As an illustration of the continuous type, in order to make the carbon desorption device more suitable for the continuous operation mode, the liquid outlet of the anode chamber is located at the upper part of the anode chamber, and the liquid outlet of the cathode chamber is located at the upper part of the cathode chamber, thereby ensuring that the liquid in the anode chamber and the cathode chamber overflows at the upper part, and realizing the continuous outflow of the liquid in the anode chamber and the cathode chamber during the overflow process.
[0055] Since the carbon absorption liquid is converted into the desorption liquid after electrolysis in the anode chamber and carbon dioxide is produced; therefore, the desorption liquid will be accompanied by desorbed carbon dioxide. In order to separate the carbon dioxide in the desorption liquid, the modular carbon desorption device may also include a gas-liquid separation mechanism, the liquid inlet of the gas-liquid separation mechanism is connected to the anode chamber liquid outlet pipe 8, and the liquid outlet of the gas-liquid separation mechanism is connected to the cathode chamber liquid inlet pipe 9; the gas-liquid separation mechanism may include a flash tank. The desorption liquid in the anode chamber enters the gas-liquid separation mechanism through the anode chamber liquid outlet pipe 8 to perform gas-liquid separation, and obtains carbon dioxide gas and the desorption liquid after the carbon dioxide gas is separated; then the desorption liquid is transported to the cathode chamber through the cathode chamber liquid inlet pipe 9.
[0056] In order to extend the liquid flow path in the anode chamber and the cathode chamber and promote the full progress of the electrolysis reaction, the liquid inlet of the anode chamber is located at the lower part of the anode chamber, and the liquid inlet of the cathode chamber is located at the lower part of the cathode chamber; and the liquid inlet and liquid outlet in the same anode chamber are arranged oppositely, and the liquid inlet and liquid outlet in the same cathode chamber are arranged oppositely; the opposite arrangement here can also be understood as the relative arrangement of the side walls where the liquid inlet and liquid outlet are located. In addition, when the operation is stopped, in order to fully discharge the liquid in the anode chamber and the cathode chamber, a drain port can be opened at the bottom of the anode chamber and the cathode chamber.
[0057] In the utility model, a cycle process of the continuous working mode can be: the carbon absorption liquid is provided to each anode chamber of the electrolytic cell from the anode chamber liquid inlet pipe 7, and the carbon absorption liquid is converted into the desorption liquid (mixed with carbon dioxide) through electrolysis in each anode chamber.
[0058] During the electrolysis process, the desorption liquid in each anode chamber is transported to the gas-liquid separation mechanism through the anode chamber liquid outlet channel for gas-liquid separation to obtain carbon dioxide gas and the desorption liquid after the carbon dioxide gas is separated.
[0059] Then, the desorbed liquid after gas-liquid separation is transported from the cathode chamber liquid inlet pipe 9 to each cathode chamber for further electrolysis, and the desorbed liquid is converted into the liquid to be absorbed in each cathode chamber through electrolysis; during the electrolysis process, the liquid to be absorbed in each cathode chamber is discharged through the cathode chamber discharge channel. Note: In the continuous working mode, electrolysis is continuously performed, and the anode chamber and the cathode chamber continuously flow in and out of the liquid.
[0060] The present invention also provides a carbon capture system, which includes a carbon absorption device and a modular carbon desorption device as described above, so as to absorb carbon dioxide in flue gas and efficiently desorb the absorbed carbon dioxide gas from the modular carbon desorption device.
[0061] Specifically, the carbon absorption device generally includes a carbon absorption tower, the carbon absorption device has a carbon absorption liquid discharge port and a liquid receiving port to be absorbed, and of course, the carbon absorption device also has a flue gas inlet and a gas discharge port. In order to make the carbon absorption device and the modular carbon desorption device form a liquid circuit circulation, the carbon absorption liquid discharge port is connected to the anode chamber liquid inlet pipe 7, and the liquid receiving port to be absorbed is connected to the cathode chamber liquid outlet pipe 10.
[0062] The above technical solutions of the present invention are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.
Claims
1. A modular carbon desorption device, characterized in that: The invention comprises a carbon desorption assembly and a liquid path assembly; the carbon desorption assembly comprises at least one carbon desorption tank, and a cover is installed on the top of the carbon desorption tank; at least one intermediate partition is provided in the carbon desorption tank, and the carbon desorption tank is divided into a plurality of carbon desorption units by the at least one intermediate partition; The carbon desorption unit is provided with an anode plate, a cathode plate and an anion exchange membrane, and the anode plate and the cathode plate in the same carbon desorption unit are separated by the anion exchange membrane to form an anode chamber and a cathode chamber in the same carbon desorption unit; The liquid circuit assembly includes an anode chamber liquid inlet pipe, an anode chamber liquid outlet pipe, a cathode chamber liquid inlet pipe and a cathode chamber liquid outlet pipe; the liquid inlet of the anode chamber is connected to the anode chamber liquid inlet pipe, the liquid outlet of the anode chamber is connected to the anode chamber liquid outlet pipe, the liquid inlet of the cathode chamber is connected to the cathode chamber liquid inlet pipe, and the liquid outlet of the cathode chamber is connected to the cathode chamber liquid outlet pipe.
2. The modular carbon desorption device according to claim 1, characterized in that A gas collecting port is provided at the top or upper portion of the anode chamber; the modular carbon desorption device further comprises a gas collecting pipeline, and the gas collecting pipeline is connected to the gas collecting port.
3. The modular carbon desorption device according to claim 1, characterized in that The drain port of the anode chamber is located at the lower part or bottom of the anode chamber, and the drain port of the anode chamber is connected to the anode chamber outlet pipe; the drain port of the cathode chamber is located at the lower part or bottom of the cathode chamber, and the drain port of the cathode chamber is connected to the cathode chamber outlet pipe.
4. The modular carbon desorption device according to claim 1, characterized in that The liquid circuit assembly also includes an anode chamber circulation pipeline and a cathode chamber circulation pipeline. The liquid inlet and liquid outlet of the anode chamber circulation pipeline are both connected to the same anode chamber, and the liquid inlet and liquid outlet of the cathode chamber circulation pipeline are both connected to the same cathode chamber.
5. The modular carbon desorption device according to claim 1, characterized in that The modular carbon desorption device also includes a desorption liquid transfer tank; the anode chamber liquid outlet pipeline is connected to the liquid inlet of the desorption liquid transfer tank, and the cathode chamber liquid inlet pipeline is connected to the liquid outlet of the desorption liquid transfer tank.
6. The modular carbon desorption device according to claim 1, characterized in that The liquid outlet of the anode chamber is located at the upper part of the anode chamber, and the liquid outlet of the cathode chamber is located at the upper part of the cathode chamber.
7. The modular carbon desorption device according to claim 6, characterized in that The modular carbon desorption device also includes a gas-liquid separation mechanism, the liquid inlet of the gas-liquid separation mechanism is connected to the anode chamber liquid outlet pipeline, and the liquid outlet of the gas-liquid separation mechanism is connected to the cathode chamber liquid inlet pipeline.
8. The modular carbon desorption device according to claim 6, characterized in that The liquid inlet of the anode chamber is located at the lower part of the anode chamber, and the liquid inlet of the cathode chamber is located at the lower part of the cathode chamber; and the liquid inlet and liquid outlet in the same anode chamber are arranged opposite to each other, and the liquid inlet and liquid outlet in the same cathode chamber are arranged opposite to each other.
9. The modular carbon desorption device according to any one of claims 1 to 8, characterized in that: The carbon desorption units in the carbon desorption tank are arranged in sequence along the same direction; The modular carbon desorption device also includes a circuit component, which includes an anode conductive row and a cathode conductive row; each of the anode plates in the carbon desorption cell is electrically connected to the same anode conductive row, and each of the cathode plates in the carbon desorption cell is electrically connected to the same cathode conductive row.
10. A carbon capture system, characterized in that: The carbon capture system comprises a carbon absorption device and a modular carbon desorption device as claimed in any one of claims 1 to 9; The carbon absorption device has a carbon absorption liquid discharge port and a liquid receiving port for absorption. The carbon absorption liquid discharge port is connected to the anode chamber liquid inlet pipeline, and the liquid receiving port for absorption is connected to the cathode chamber liquid outlet pipeline.