Electro-adsorption unit, electro-adsorption module and purification equipment

Abstract

The utility model relates to an electro-adsorption unit, an electro-adsorption module and purification equipment, the electro-adsorption unit comprises an electrode plate, a water flow guide plate, an electrode liquid guide plate and an ion exchange membrane, and the inner walls of the two sides of the water flow guide plate in the width direction of the water flow guide plate protrude to form a plurality of first guide parts extending in the opposite directions; all the first flow guide parts on the inner wall of each side are arranged at intervals in the length direction of the water flow guide plate, and all the first flow guide parts on the inner wall of one side are arranged in a staggered mode relative to all the first flow guide parts on the inner wall of the other side. All the first flow guide parts on the inner walls of the two sides and the inner wall of the water flow guide plate jointly define a first flow passing channel extending in a zigzag mode. The first overflowing channel can prolong the flowing path of the to-be-purified water flow in the first overflowing cavity, so that the desorption time of the to-be-purified water flow is prolonged, and the purification effect is effectively improved.

Description

Technical Field

[0001] This application relates to the field of purification equipment technology, and in particular to an electro-adsorption unit, an electro-adsorption module, and a purification device. Background Technology

[0002] Currently, my country suffers from severe water pollution. As the source of life, water is a basic guarantee for physical health. Judging from the current market situation, various water purification devices reflect the strong demand of the public for water purification products.

[0003] With the development of electrochemical technology, electroadsorption desalination technology has received increasing attention. Electroadsorption technology utilizes the electroadsorption capacity of capacitors to remove salt ions from water, thus obtaining fresh water. Compared to other technologies, electroadsorption technology not only has high energy efficiency but also does not pollute the environment, achieving energy-saving and environmentally friendly results. Therefore, electroadsorption technology is widely used in water purification devices.

[0004] In existing technologies, water purification devices using electroadsorption technology typically employ flowing electrodes to desorb salt ions for continuous desalination. However, their adsorption effect is relatively poor, and they are only suitable for relatively simple water treatment scenarios, making it difficult to handle different water treatment conditions. Utility Model Content

[0005] Therefore, it is necessary to provide an electro-adsorption unit, an electro-adsorption module, and a purification device to address the above problems.

[0006] An electro-adsorption unit includes an electrode plate, a water flow guide plate, an electrode liquid guide plate, and an ion exchange membrane. An ion exchange membrane is sealed on each side of the water flow guide plate along its thickness direction. An electrode liquid guide plate is sealed on the side of each of the two ion exchange membranes away from the water flow guide plate. An electrode plate is sealed on the side of each of the two electrode liquid guide plates away from the ion exchange membranes.

[0007] The water flow guide plate has a first flow cavity extending through its own thickness, and the water flow guide plate has a first inlet and a first outlet communicating with the first flow cavity at both ends along its own length. Several first guide portions extending in opposite directions are formed on the inner walls of both sides of the water flow guide plate along its own width. All the first guide portions on the inner walls of each side are spaced apart along the length of the water flow guide plate, and all the first guide portions on one side of the inner wall are offset relative to all the first guide portions on the other side of the inner wall. All the first guide portions on both sides of the inner walls and the inner walls of the water flow guide plate together form a tortuous and extending first flow channel.

[0008] In one embodiment, the water flow guide plate is constructed with a first mounting port and a second mounting port communicating with the first flow cavity on both sides along its thickness direction; the peripheral edge of the first mounting port is recessed to form a first mounting groove communicating with the first flow cavity, and the bottom wall of the first mounting groove is used for sealing and mating with one of the ion exchange membranes; the peripheral edge of the second mounting port is recessed to form a second mounting groove communicating with the first flow cavity, and the bottom wall of the second mounting groove is used for sealing and mating with another of the ion exchange membranes.

[0009] In one embodiment, a first seal is further included, which is sealed between the ion exchange membrane and the bottom wall of the first mounting tank, and between the ion exchange membrane and the bottom wall of the second mounting tank.

[0010] In one embodiment, a second flow cavity is formed within the electrode liquid guide plate, extending through its own thickness direction. The electrode liquid guide plate has a second inlet and a second outlet at both ends along its own length direction, which communicate with the second flow cavity. Several opposing second guide portions are formed protruding from the inner walls of both sides of the electrode liquid guide plate along its own width direction. All the second guide portions on each side of the inner wall are spaced apart along the length direction of the electrode liquid guide plate. All the second guide portions on one side of the inner wall are staggered relative to all the second guide portions on the other side of the inner wall. All the second guide portions on both sides of the inner wall and the inner walls of the electrode liquid guide plate together form a tortuous second flow channel.

[0011] In one embodiment, the electrode liquid guide plate has a third mounting port and a fourth mounting port on both sides along its thickness direction, which communicate with the second flow cavity; the peripheral edge of the third mounting port is recessed to form a third mounting groove that communicates with the second flow cavity, and the bottom wall of the third mounting groove is used for sealing and mating with the ion exchange membrane; the peripheral edge of the fourth mounting port is recessed to form a fourth mounting groove that communicates with the second flow cavity, and the bottom wall of the fourth mounting groove is used for sealing and mating with the electrode plate.

[0012] In one embodiment, a second seal is further included, which is sealed between the ion exchange membrane and the bottom wall of the third mounting tank, and between the electrode plate and the bottom wall of the third mounting tank.

[0013] In one embodiment, the two ion exchange membranes are an anion exchange membrane and a cation exchange membrane, respectively.

[0014] An electro-adsorption module includes at least one electro-adsorption unit as described in the foregoing embodiment, wherein each of the electro-adsorption units is stacked sequentially to jointly constitute the electro-adsorption module.

[0015] In two adjacent electroadsorption units, the two electroadsorption units share the same electrode plate on the side closest to each other.

[0016] In one embodiment, a protective plate is also included, with the protective plate being attached to both opposite sides of the electroadsorption module along the stacking direction.

[0017] A purification device includes the electro-adsorption module as described in the foregoing embodiments.

[0018] The aforementioned electro-adsorption unit, electro-adsorption module, and purification equipment include an electro-adsorption unit comprising an electrode plate, a water flow guide plate, an electrode liquid guide plate, and ion exchange membranes. An ion exchange membrane is sealed on each side of the water flow guide plate along its thickness direction. An electrode liquid guide plate is sealed on the side of each ion exchange membrane facing away from the water flow guide plate, and an electrode plate is sealed on the side of each electrode liquid guide plate facing away from the ion exchange membranes. A first flow cavity is formed within the water flow guide plate, extending along its thickness direction. A first inlet and a first outlet communicating with the first flow cavity are respectively opened at both ends of the water flow guide plate along its length direction. The water flow guide plate has several protruding, opposing first guide sections on its inner walls along its width. All the first guide sections on each inner wall are spaced apart along the length of the water flow guide plate, and are staggered relative to the first guide sections on the other inner wall. These first guide sections on both inner walls, together with the inner walls of the water flow guide plate, form a tortuous first flow channel. When the water to be purified is introduced through the first inlet of the water flow guide plate, it enters the first flow cavity. The first guide sections guide the flow direction of the water to be purified within the first flow cavity, allowing it to flow along the first flow channel and finally exit from the first outlet of the water flow guide plate. In this way, the first flow channel extends the flow path of the water to be purified within the first flow cavity, thereby increasing the desorption time and effectively improving the purification effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the exploded structure of the electroadsorption module in this application.

[0020] Figure 2 This is a schematic diagram of the electroadsorption module in this application.

[0021] Figure 3 This is a schematic diagram of the water flow guide plate in this application from a first-view perspective.

[0022] Figure 4 This is a schematic diagram of the water flow guide plate in this application from a second perspective.

[0023] Figure 5 This is a cross-sectional structural diagram of the water flow guide plate in this application.

[0024] Figure 6 This is a schematic diagram of the electrode liquid guide plate in this application from a first-view perspective.

[0025] Figure 7 This is a schematic diagram of the electrode liquid guide plate in this application from a second perspective.

[0026] Figure 8 This is a cross-sectional structural diagram of the electrode liquid guide plate in this application.

[0027] Figure Labels

[0028] Electroadsorption module 100;

[0029] Electroadsorption unit 200;

[0030] Electrode plate 20; cation exchange membrane 21; anion exchange membrane 22; first sealing element 23; second sealing element 24;

[0031] Flow guide plate 25; first flow cavity 251; first flow channel 252; first guide section 253; first inlet 254; first outlet 255; first mounting port 256; second mounting port 257; first mounting groove 258; second mounting groove 259;

[0032] Electrode liquid guide plate 26; second flow cavity 261; second flow channel 262; second guide part 263; second inlet 264; second outlet 265; third mounting port 266; fourth mounting port 267; third mounting groove 268; fourth mounting groove 269;

[0033] Protection board 300. Detailed Implementation

[0034] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0035] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0036] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0040] Currently, my country suffers from severe water pollution. As the source of life, water is a basic guarantee for physical health. Judging from the current market situation, various water purification devices reflect the strong demand of the public for water purification products.

[0041] With the development of electrochemical technology, electroadsorption desalination technology has received increasing attention. Electroadsorption technology utilizes the electroadsorption capacity of capacitors to remove salt ions from water, thus obtaining fresh water. Compared to other technologies, electroadsorption technology not only has high energy efficiency but also does not pollute the environment, achieving energy-saving and environmentally friendly results. Therefore, electroadsorption technology is widely used in water purification devices.

[0042] In existing technologies, water purification devices using electroadsorption technology typically employ flowing electrodes to desorb salt ions for continuous desalination. However, their adsorption effect is relatively poor, and they are only suitable for relatively simple water treatment scenarios, making it difficult to handle different water treatment conditions.

[0043] Based on the above considerations, in order to solve the above problems, please refer to [link / reference needed]. Figure 1 and Figure 2 One or more embodiments of this application provide a purification device, which includes an electro-adsorption module 100. The electro-adsorption module 100 includes at least one electro-adsorption unit 200, with the units 200 stacked sequentially to collectively constitute the electro-adsorption module 100. Thus, users can select to connect the electro-adsorption units 200 in parallel or in series according to actual needs to adjust the purification efficiency and effect of the electro-adsorption module 100, making it flexible and applicable to various water treatment conditions to meet user requirements.

[0044] Furthermore, the electro-adsorption unit 200 creatively adds a flow guide in the first flow cavity 251 of the water flow guide plate 25 to extend the flow path of the water to be purified in the first flow cavity 251, thereby increasing the desorption time of the water to be purified and effectively improving the purification effect.

[0045] Specifically, please see Figure 1 and Figure 2The electro-adsorption unit 200 includes an electrode plate 20, a water flow guide plate 25, an electrode liquid guide plate 26, and an ion exchange membrane. An ion exchange membrane is sealed on both sides of the water flow guide plate 25 along its thickness direction. An electrode liquid guide plate 26 is sealed on the side of each ion exchange membrane away from the water flow guide plate 25. An electrode plate 20 is sealed on the side of each electrode liquid guide plate 26 away from the ion exchange membrane.

[0046] It is understood that electrode liquid is introduced into the electrode liquid guide plate 26, and the electrode plates 20 and ion exchange membranes on both sides of the electrode liquid guide plate 26 can seal the electrode liquid guide plate 26 to prevent electrode liquid leakage. Water to be purified is introduced into the water flow guide plate 25, and the ion exchange membranes on both sides of the water flow guide plate 25 can seal the water flow guide plate 25 to prevent water to be purified from leaking.

[0047] During the specific operation of the electro-adsorption unit 200, current is passed through the two electrode plates 20. The two electrode plates 20 can conduct current and ionize the electrode liquid in the two electrode liquid guide plates 26 respectively, thereby adsorbing ions in the water to be purified in the water flow guide plate 25, thus realizing sewage purification.

[0048] Please see in this application. Figures 3 to 5 The water flow guide plate 25 has a first flow cavity 251 extending through its own thickness direction, and the water flow guide plate 25 has a first inlet 254 and a first outlet 255 communicating with the first flow cavity 251 at both ends along its own length direction. Several first guide portions 253 protrude from the inner walls of both sides of the water flow guide plate 25 along its own width direction. All the first guide portions 253 on each inner wall are spaced apart along the length direction of the water flow guide plate 25, and all the first guide portions 253 on one inner wall are staggered relative to all the first guide portions 253 on the other inner wall. All the first guide portions 253 on both inner walls and the inner walls of the water flow guide plate 25 together form a tortuous first flow channel 252.

[0049] Understandably, after the water to be purified is introduced through the first inlet 254 of the water flow guide plate 25, the water will enter the first flow cavity 251. The first guide section 253 can guide the flow direction of the water to be purified within the first flow cavity 251, so that the water to be purified flows along the first flow channel 252 and finally exits from the first outlet 255 of the water flow guide plate 25. In this way, the first flow channel 252 can extend the flow path of the water to be purified within the first flow cavity 251, thereby increasing the desorption time of the water to be purified and effectively improving the purification effect.

[0050] Further, please see Figure 1The two ion exchange membranes are anion exchange membrane 22 and cation exchange membrane 21.

[0051] In some embodiments, see Figures 3 to 5 The water flow guide plate 25 has a first mounting port 256 and a second mounting port 257 on both sides along its thickness direction, which communicate with the first flow cavity 251. The peripheral edge of the first mounting port 256 has a recessed first mounting groove 258 communicating with the first flow cavity 251, and the bottom wall of the first mounting groove 258 is used for sealing and mating with an ion exchange membrane. The peripheral edge of the second mounting port 257 has a recessed second mounting groove 259 communicating with the first flow cavity 251, and the bottom wall of the second mounting groove 259 is used for sealing and mating with another ion exchange membrane.

[0052] Understandably, the ion exchange membrane is assembled within the first mounting groove 258 and sealed to the water flow guide plate 25. This helps improve the stability of the ion exchange membrane assembly.

[0053] In some embodiments, see Figures 3 to 5 The electro-adsorption unit 200 also includes a first sealing element 23, which is sealed between the ion exchange membrane and the bottom wall of the first mounting tank 258, and between the ion exchange membrane and the bottom wall of the second mounting tank 259.

[0054] Understandably, the first seal 23 can further improve the sealing effect between the ion exchange membrane and the water flow guide plate 25 to prevent leakage of the water to be purified.

[0055] In some embodiments, see Figures 6 to 8 The electrode liquid guide plate 26 has a second flow cavity 261 extending through its thickness direction. The electrode liquid guide plate 26 has a second inlet 264 and a second outlet 265 at both ends along its length direction, communicating with the second flow cavity 261. Several opposing second guide portions 263 protrude from the inner walls of both sides of the electrode liquid guide plate 26 along its width direction. All the second guide portions 263 on each inner wall are spaced apart along the length direction of the electrode liquid guide plate 26, and are staggered relative to the second guide portions 263 on the other inner wall. All the second guide portions 263 on both inner walls, together with the inner walls of the electrode liquid guide plate 26, form a tortuous second flow channel 262.

[0056] Understandably, after the electrode liquid is introduced through the second inlet 264 of the electrode liquid guide plate 26, it enters the second flow chamber 261. The second guide section 263 guides the flow direction of the electrode liquid within the second flow chamber 261, allowing it to flow along the second flow channel 262 and finally exit from the second outlet 265 of the electrode liquid guide plate 26. Thus, the second flow channel 262 extends the flow path of the electrode liquid within the second flow chamber 261, increasing the ionization time and improving the ionization effect, thereby enhancing the adsorption and purification effect.

[0057] In some embodiments, see Figures 6 to 8 The electrode liquid guide plate 26 has a third mounting port 266 and a fourth mounting port 267 formed on both sides along its thickness direction, which communicate with the second flow cavity 261. The peripheral edge of the third mounting port 266 is recessed to form a third mounting groove 268 communicating with the second flow cavity 261, and the bottom wall of the third mounting groove 268 is used for sealing and mating with the ion exchange membrane. The peripheral edge of the fourth mounting port 267 is recessed to form a fourth mounting groove 269 communicating with the second flow cavity 261, and the bottom wall of the fourth mounting groove 269 is used for sealing and mating with the electrode plate 20.

[0058] It is understandable that the electrode plate 20 and the ion exchange membrane, on the side facing away from the water flow guide plate 25, are respectively assembled in the first mounting grooves 258 on opposite sides of the electrode liquid guide plate 26, and are both sealed and fitted with the electrode liquid guide plate 26. This helps to improve the stability of the assembly of the ion exchange membrane and the electrode plate 20.

[0059] In some embodiments, see Figures 6 to 8 The electro-adsorption unit 200 also includes a second sealing member 24, which is sealed between the ion exchange membrane and the bottom wall of the third mounting tank 268, and between the electrode plate 20 and the bottom wall of the third mounting tank 268.

[0060] Understandably, the second seal 24 can further improve the sealing effect between the ion exchange membrane and the water flow guide plate 25, and between the electrode plate 20 and the electrode liquid guide plate 26, so as to prevent electrode liquid leakage.

[0061] Some electroadsorption modules 100 include at least one electroadsorption unit 200, see [link to relevant documentation]. Figure 1 and Figure 2 In an embodiment where each electroadsorption unit 200 is stacked sequentially to form an electroadsorption module 100, in two adjacent electroadsorption units 200, the side of the two electroadsorption units 200 that is close to each other shares the same electrode plate 20.

[0062] It is understood that the electroadsorption unit 200 has a stacked structure, which sequentially includes an electrode plate 20, an electrode liquid guide plate 26, an ion exchange membrane, a water flow guide plate 25, an ion exchange membrane, an electrode liquid guide plate 26, and an electrode plate 20. Therefore, when multiple electroadsorption units 200 are stacked sequentially to form the electroadsorption module 100, the side of two adjacent electroadsorption units 200 that is close to each other is the electrode plate 20. By sharing the same electrode plate 20 on the side of two electroadsorption units 200 that are close to each other, this application can avoid functional duplication and save costs.

[0063] It should also be noted that users can select to connect each electroadsorption unit 200 in parallel or in series according to actual needs to adjust the purification efficiency and purification effect of the electroadsorption module 100. It is flexible in use and can be used in a variety of water treatment conditions to meet user requirements.

[0064] Specifically, this embodiment is written with the example of an electroadsorption module 100 having two electroadsorption units 200, and the two electroadsorption units 200 are defined as the first electroadsorption unit and the second electroadsorption unit.

[0065] When the first electroadsorption unit and the second electroadsorption unit are connected in series, the first outlet 255 of the water flow guide plate in the first electroadsorption unit is connected to the first inlet 264 of the water flow guide plate in the second electroadsorption unit. After undergoing the first purification treatment in the first electroadsorption unit, the water to be purified flows into the second electroadsorption unit, where it undergoes a second purification treatment. In this way, by connecting the electroadsorption units 200 in series, the electroadsorption module 100 can achieve multiple purification treatments for the water to be purified, thereby effectively improving the purification effect of the water.

[0066] When the first electroadsorption unit and the second electroadsorption unit are connected in parallel, the water to be purified can flow into the first electroadsorption unit and the second electroadsorption unit respectively, and be purified respectively. In this way, by connecting the electroadsorption units 200 in parallel, the electroadsorption module 100 can simultaneously purify multiple streams of water to be purified, so as to ensure the purification efficiency of the electroadsorption module 100.

[0067] Further, please see Figure 1 and Figure 2 The electro-adsorption module 100 also includes a protective plate 300, and the electro-adsorption module 100 is equipped with protective plates 300 on both opposite sides along the stacking direction.

[0068] Understandably, the electro-adsorption module 100 also has a stacked structure, which includes a protective plate 300, multiple electro-adsorption units 200, and the protective plate 300 in sequence. The protective plate 300 can protect the electro-adsorption units 200 to extend the service life of the product.

[0069] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An electroadsorption unit, characterized in that, The device includes an electrode plate, a water flow guide plate, an electrode liquid guide plate, and an ion exchange membrane. An ion exchange membrane is sealed on each side of the water flow guide plate along its thickness direction. An electrode liquid guide plate is sealed on the side of each of the two ion exchange membranes away from the water flow guide plate. An electrode plate is sealed on the side of each of the two electrode liquid guide plates away from the ion exchange membranes. The water flow guide plate has a first flow cavity extending through its own thickness, and the water flow guide plate has a first inlet and a first outlet communicating with the first flow cavity at both ends along its own length. Several first guide portions extending in opposite directions are formed on the inner walls of both sides of the water flow guide plate along its own width. All the first guide portions on the inner walls of each side are spaced apart along the length of the water flow guide plate, and all the first guide portions on one side of the inner wall are offset relative to all the first guide portions on the other side of the inner wall. All the first guide portions on both sides of the inner walls and the inner walls of the water flow guide plate together form a tortuous and extending first flow channel.

2. The electroadsorption unit according to claim 1, characterized in that, The water flow guide plate has a first mounting port and a second mounting port on both sides along its thickness direction, which are connected to the first flow cavity. The peripheral edge of the first mounting port is recessed to form a first mounting groove that is connected to the first flow cavity, and the bottom wall of the first mounting groove is used to seal and mate with one of the ion exchange membranes. The peripheral edge of the second mounting port is recessed to form a second mounting groove that is connected to the first flow cavity, and the bottom wall of the second mounting groove is used to seal and mate with another of the ion exchange membranes.

3. The electroadsorption unit according to claim 2, characterized in that, It also includes a first sealing element, which is sealed between the ion exchange membrane and the bottom wall of the first mounting tank, and between the ion exchange membrane and the bottom wall of the second mounting tank.

4. The electroadsorption unit according to claim 1, characterized in that, The electrode liquid guide plate has a second flow cavity extending through its own thickness, and the electrode liquid guide plate has a second inlet and a second outlet communicating with the second flow cavity at both ends along its own length. The electrode liquid guide plate has several opposing second guide portions protruding from the inner walls on both sides along its own width. All the second guide portions on the inner walls on each side are spaced apart along the length of the electrode liquid guide plate, and all the second guide portions on one side of the inner wall are offset relative to all the second guide portions on the other side of the inner wall. All the second guide portions on both sides of the inner walls and the inner walls of the electrode liquid guide plate together form a tortuous second flow channel.

5. The electroadsorption unit according to claim 4, characterized in that, The electrode liquid guide plate has a third mounting port and a fourth mounting port on both sides along its thickness direction, which are connected to the second flow cavity. The peripheral edge of the third mounting port is recessed to form a third mounting groove that is connected to the second flow cavity, and the bottom wall of the third mounting groove is used to seal and mate with the ion exchange membrane. The peripheral edge of the fourth mounting port is recessed to form a fourth mounting groove that is connected to the second flow cavity, and the bottom wall of the fourth mounting groove is used to seal and mate with the electrode plate.

6. The electroadsorption unit according to claim 5, characterized in that, It also includes a second sealing element, which is sealed between the ion exchange membrane and the bottom wall of the third mounting tank, and between the electrode plate and the bottom wall of the third mounting tank.

7. The electroadsorption unit according to any one of claims 1 to 6, characterized in that, The two ion exchange membranes are an anion exchange membrane and a cation exchange membrane, respectively.

8. An electroadsorption module, characterized in that, It includes at least one electroadsorption unit as described in any one of claims 1 to 7, wherein each of the electroadsorption units is stacked sequentially to jointly constitute the electroadsorption module; In two adjacent electroadsorption units, the two electroadsorption units share the same electrode plate on the side closest to each other.

9. The electroadsorption module according to claim 8, characterized in that, It also includes protective plates, which are attached to opposite sides of the electroadsorption module along the stacking direction.

10. A purification device, characterized in that, Includes the electroadsorption module as described in any one of claims 8 to 9.

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