An electrolytic cell

Abstract

The application discloses an electrolytic cell, which comprises a cell body (1) with an electrode chamber (110), and a pair of electrode sheets (3) are arranged in the electrode chamber (110) at intervals, characterized in that the electrolytic cell further comprises a driving mechanism for driving the electrode sheets (3) to translate, so as to adjust the interval between the two electrode sheets (3). Compared with the prior art, the electrolytic cell can conveniently adjust the pH value of water.

Description

Technical Field

[0001] This invention relates to the field of electrolysis equipment technology, specifically to an electrolytic cell. Background Technology

[0002] An electrolytic cell consists of a cell body, an anode, and a cathode. Most electrolytic cells use an ion-exchange membrane (also called a diaphragm) to separate the anode and cathode chambers. Based on the type of electrolyte, they are classified into three categories: aqueous solution electrolytic cells, molten salt electrolytic cells, and non-aqueous solution electrolytic cells. When direct current passes through the electrolytic cell, an oxidation reaction occurs at the anode-solution interface, and a reduction reaction occurs at the cathode-solution interface, thus producing electrolyzed water.

[0003] For example, the Chinese invention patent with patent application number CN201810264395.4 (publication number CN108609693A) entitled "A Method for Preparing Acidic Water and Alkaline Water" uses the electrolysis of brine to form cations and anions, which move towards the two electrodes of the electrolysis. Hydrogen ions and highly reactive chlorine gas are generated from the anode. The chlorine gas dissolves in water to form hypochlorous acid and hydrochloric acid solutions as acidic water. Hydroxide ions and hydrogen gas are generated from the cathode to form sodium hydroxide solution as alkaline water.

[0004] The existing water electrolysis process has the following problems:

[0005] First, ion exchange membranes are unique polymer membranes containing ionic groups that selectively allow cations or anions in a solution to pass through. They have a certain degree of flexibility and, over time, can deform under the influence of air and water pressure, or even come into contact with the electrode plates and cause dry burning, affecting the water output and the lifespan of the electrolyzer. These problems are even more serious in small electrolyzers.

[0006] Secondly, during the electrolysis process, a large number of bubbles are generated on the anode and cathode plates. These bubbles accumulate on the electrode plates, ion exchange membranes, and water channels in the electrolytic cell, resulting in high voltage requirements and high energy consumption for the electrolysis system. They also reduce the effective electrolysis area, decrease the electrolysis reaction efficiency, lead to low pH of the effluent, and obstruct the smooth flow of water channels, making the pH value and voltage extremely unstable. The gas pressure will also exacerbate the deformation of the intermediate ion exchange membrane, especially in small electrolytic cells where the above problems are more serious.

[0007] Third, during electrolysis, the OH- generated at the cathode (negative electrode) - It will react with Ca in the water 2+ Mg 2+ The reaction produces scale, which deposits on the cathode and ion exchange membrane, affecting the electrolysis effect and the lifespan of the electrolytic cell.

[0008] Fourth, during the electrolysis process, ions need to pass through the ion exchange membrane from the anode chamber to the cathode chamber before the entire electrolysis reaction can proceed. However, during the electrolysis reaction, ions and products tend to accumulate around the electrode plates, which is not conducive to the diffusion and transfer of ions and the uniformity of products, thus affecting the electrolysis efficiency and pH stability.

[0009] Fifth, different usage scenarios require different pH values ​​for electrolyzed water. For example, moderate to heavy oil stain cleaning requires super-alkaline electrolyzed water with a pH > 12, while light oil stain cleaning can have a pH lowered to around 11. Drinking water requires weakly alkaline electrolyzed water (pH 8-8.5). Currently, large electrolyzers use multiple sets of electrodes for simultaneous electrolysis, and the electrode area is large, resulting in a large water flow rate. The pH value is generally adjusted by intelligently adjusting the water flow rate. For low-cost, small electrolyzer systems with only one pair of positive and negative electrodes and a small electrode area, the water flow rate is limited. An excessively low water flow rate is not conducive to user experience, so it is difficult to adjust the pH value by adjusting the water flow rate. Generally, the pH value is adjusted by disassembling and reassembling the electrolyzer and adjusting the electrode spacing to change the water path size and current. This method requires professional operation, cannot be adjusted online in real time, is not intelligent enough, and is not conducive to user experience. Summary of the Invention

[0010] The first technical problem to be solved by the present invention is to provide an electrolytic cell that can conveniently adjust the pH value of the effluent, in light of the current state of the prior art.

[0011] The second technical problem to be solved by the present invention is to provide an electrolytic cell that can avoid dry burning caused by the diaphragm contacting the electrode sheet.

[0012] The third technical problem to be solved by the present invention is to provide an electrolytic cell that can accelerate the exhaust of gas.

[0013] The fourth technical problem to be solved by the present invention is to provide an electrolytic cell that can inhibit scale deposition.

[0014] The fifth technical problem to be solved by the present invention is to provide an electrolyzer capable of accelerating ion transfer.

[0015] The sixth technical problem to be solved by the present invention is to provide an electrolytic cell that can realize the function of diaphragm support.

[0016] The seventh technical problem to be solved by the present invention is to provide an electrolytic cell that can achieve the function of scraping and descaling.

[0017] The technical solution adopted by the present invention to solve the first technical problem mentioned above is: an electrolytic cell, including a cell body with an electrode chamber, wherein a pair of electrode plates arranged at intervals are provided in the electrode chamber, characterized in that: it further includes a driving mechanism for driving the electrode plates to translate, so as to adjust the distance between the two electrode plates.

[0018] To further address the second, third, fourth, and fifth technical problems mentioned above, a diaphragm is provided inside the tank, which divides the inner cavity of the tank into at least two electrode chambers. Two electrode plates are respectively disposed in the two electrode chambers, and at least one electrode chamber is provided with an insulating mesh for separating adjacent diaphragms and electrode plates.

[0019] To enhance the turbulence effect, the insulating mesh has at least one surface with an undulating wave structure along its length. This allows water, ions, and bubbles to pass through the mesh from all directions, accelerating ion transfer and increasing the turbulence effect.

[0020] Preferably, the waveform structure is a triangular wave or a sine wave.

[0021] In order to achieve the scraping and descaling function, the peaks or troughs of the insulating mesh are formed with scraping parts that can rub against adjacent diaphragms or electrode plates.

[0022] To create dynamic turbulence, the insulating mesh is an elastic element that can stretch and contract along its length. Because the insulating mesh has spring-like free-movement characteristics, it can stretch and contract freely under the action of water flow, accelerating the bursting and expulsion of air bubbles and promoting turbulence, thereby improving electrolysis efficiency and stability, and to some extent inhibiting scale deposition.

[0023] To enable the insulating mesh to stretch and contract along its length, the insulating mesh has a foldable wave structure.

[0024] To facilitate the processing of the insulating mesh, the insulating mesh includes at least two unit strips arranged sequentially along its length. Each unit strip has multiple mesh openings for fluid to pass through. The odd-numbered unit strip in the arrangement direction is designated as the first unit strip, and the even-numbered unit strip in the arrangement direction is designated as the second unit strip. The first side of the preceding first unit strip is connected to the first side of the following second unit strip, and the second side of the preceding second unit strip is connected to the second side of the following first unit strip. Adjacent unit strips have an included angle and can be opened and closed relative to each other.

[0025] To facilitate scraping of the diaphragm or electrode sheet, the folded edge between two adjacent unit strips is formed with a scraping part that can rub against the adjacent diaphragm or electrode sheet.

[0026] To further address the sixth and seventh technical problems mentioned above, a drive mechanism is also included for moving the end of the insulating mesh along the extension direction of the insulating mesh, so as to adjust the extension degree of the insulating mesh, so that the electrolytic cell has at least two states:

[0027] In the first state, both the electrode sheet and the diaphragm are far away from the scraping portion of the insulating mesh;

[0028] In the second state, at least one of the electrode sheet and the diaphragm is in contact with the scraping portion of the insulating mesh.

[0029] In order to maximize the use of water flow to provide force for the expansion and contraction of the insulating mesh, the expansion and contraction direction of the insulating mesh is basically consistent with the flow direction of water in the electrode chamber, so that the scraping part of the insulating mesh in the second state can make frictional contact with the adjacent diaphragm or electrode plate under the action of water flow.

[0030] To simplify the drive mechanism, the insulating mesh and electrode plates share the same drive mechanism. This reduces the need for a separate drive mechanism, simplifying the structure; furthermore, it eliminates the need for an additional control system to coordinate the movement of the insulating mesh and electrode plates.

[0031] In order to simultaneously achieve the extension and retraction of the insulating mesh and the translation of the electrode sheet, the drive mechanism has at least two power output ends with mutually perpendicular output directions.

[0032] To simplify the structure of the drive mechanism, the drive mechanism includes:

[0033] At least one set of linkage assemblies, each linkage assembly including a first linkage and a second linkage, the first ends of the first linkage and the second linkage are hinged together by a first pin, and the second end of each first linkage is hinged to the groove by a second pin;

[0034] The driving component has a telescopic rod that can extend and retract along the moving direction of the electrode sheet, and the second end of the second connecting rod is hinged to the end of the telescopic rod by a third pin.

[0035] The electrode sheet is located on the telescopic rod, and the unit strip at the head of the insulating mesh is located on the first pin.

[0036] To facilitate power supply and stable movement of the electrode plates, each electrode chamber is provided with a conductive plate arranged substantially perpendicular to the electrode plate. The first end of the electrode plate is confined to the telescopic rod, and the second end of the electrode plate is provided with a guide plate that is in close contact with the conductive plate and can slide along the extension direction of the conductive plate.

[0037] To facilitate the free movement of the insulating mesh, the free ends of the unit strips located at the tail of the insulating mesh are freely suspended.

[0038] To facilitate the installation of the drive mechanism and prevent the electrolyte from affecting the service life of the drive component, the connecting rod assembly is located in the electrode chamber, and the drive component is installed on the outside of the tank. The telescopic rod of the drive component extends into the electrode chamber through the side wall of the tank.

[0039] To facilitate the supply of raw materials and the discharge of electrolyzed water, each electrode chamber is provided with an inlet and an outlet that communicate with the electrode chamber in the corresponding tank section.

[0040] Compared with the prior art, the advantages of the present invention are as follows:

[0041] (1) The electrode plate is moved by the driving mechanism, and the distance between the electrode plate and the diaphragm can be adjusted, so as to facilitate the adjustment of the pH value of the effluent.

[0042] (2) By separating adjacent diaphragms and electrode plates with an insulating mesh, on the one hand, the insulating mesh can effectively prevent the diaphragm from contacting the electrode plate and causing dry burning; on the other hand, the water flow can form local micro-turbulence during the process of passing through the mesh, which can accelerate the exhaust, inhibit scale deposition, and accelerate ion transfer.

[0043] (2) The insulating mesh is designed as a waveform structure with different mesh orientations so that water flow, ions, bubbles, etc. can pass through the mesh from all directions, which can accelerate ion transfer and increase the turbulence effect.

[0044] (3) Because the insulating mesh has the free movement characteristics of a spring, it can move freely under the action of water flow, which will accelerate the bursting and discharge of bubbles and promote turbulence, improve electrolysis efficiency and stability, and inhibit scale deposition to a certain extent.

[0045] (4) The insulating mesh is extended and retracted by the drive mechanism, which cooperates with the translational electrode plate to realize the switching between two working states: In the first state, the electrode plate and the diaphragm are far away from the insulating mesh, and the insulating mesh can move freely under the action of water flow, forming dynamic turbulence; In the second state, the electrode plate and the diaphragm are in contact with the insulating mesh. On the one hand, the diaphragm can be stably supported, and on the other hand, the surface of the electrode plate and the diaphragm can be scraped and descaled. Attached Figure Description

[0046] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the electrolytic cell of the present invention in its first state;

[0047] Figure 2 for Figure 1 3D exploded view of the electrolytic cell;

[0048] Figure 3 for Figure 2 A magnified view of a portion of the insulating mesh;

[0049] Figure 4 for Figure 2 A three-dimensional structural diagram of the central drive mechanism;

[0050] Figure 5 for Figure 1 Longitudinal sectional view of the electrolytic cell;

[0051] Figure 6 for Figure 5 Enlarged view of Part I;

[0052] Figure 7 for Figure 5 Longitudinal sectional view of the electrolytic cell after it has switched to the second state;

[0053] Figure 8 for Figure 7 Enlarged view of Part II. Detailed Implementation

[0054] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0055] like Figures 1 to 8 The diagram shows a preferred embodiment of the electrolytic cell of the present invention. The electrolytic cell includes a cell body 1, a diaphragm 2, electrode plates 3, an insulating mesh 4, and a driving mechanism 5. The electrolytic cell in this embodiment is a single-diaphragm electrolytic cell, but it can also be designed as a double-diaphragm electrolytic cell as needed.

[0056] The trough 1 is formed by assembling two covers 11 together with fasteners. The two covers 11 surround each other to form a closed inner cavity. Two annular sealing gaskets 12 are sandwiched between the two opposite end faces of the two covers 11. Conductive sheets 13 are horizontally arranged on the top wall inside the covers 11. Each conductive sheet 13 has a conductive post 131 at its top. The conductive post 131 passes upward through the corresponding cover 11 and is exposed on the top wall of the cover 11. The conductive posts 131 of the front and rear conductive sheets 13 are used to electrically connect to the negative and positive terminals of the external power supply, respectively.

[0057] The diaphragm 2 is a cation exchange membrane, vertically arranged in the inner cavity of the tank 1, with its periphery sandwiched between the two annular sealing gaskets 12. There is one diaphragm 2, which divides the inner cavity of the tank 1 into two electrode chambers 110. The electrode chamber 110 located between the front cover 11 and the diaphragm 2 is designated as cathode chamber 110a, and the electrode chamber 110 located between the rear cover 11 and the diaphragm 2 is designated as anode chamber 110b. Each cover 11 has an inlet 111 and an outlet 112 communicating with the corresponding electrode chamber 110, respectively. Therefore, the water in each electrode chamber 110 flows from bottom to top.

[0058] There is a pair of electrode plates 3, referred to as cathode plate 3a and anode plate 3b respectively. The cathode plate 3a is arranged in a basically vertical position at the front of the cathode chamber 110a, and the anode plate 3b is arranged in a basically vertical position at the rear of the anode chamber 110b. Each electrode plate 3 has a basically horizontally arranged guide plate 31 at its top end. The guide plate 31 is in close contact with the bottom surface of the conductive plate 13 to achieve electrical connection and can slide in the front-back direction.

[0059] There are two insulating meshes 4, which correspond one-to-one with the two electrode chambers 110 mentioned above. They are located in the corresponding electrode chambers 110 and are used to separate the adjacent diaphragms 2 and electrode sheets 3.

[0060] In this embodiment, the insulating mesh 4 has a foldable triangular wave structure along its length. Specifically, the insulating mesh 4 is composed of at least two unit strips 41 arranged sequentially along its length. Each unit strip 41 has multiple mesh holes 411 arranged in a matrix to allow fluid to pass through. The porosity of the insulating mesh 4 is 50%. The odd-numbered unit strip 41 in the arrangement direction is designated as the first unit strip 41a, and the even-numbered unit strip 41 in the arrangement direction is designated as the second unit strip 41b. The first side of the preceding first unit strip 41a is connected to the first side of the following second unit strip 41b, and the second side of the preceding second unit strip 41b is connected to the second side of the following first unit strip 41a.

[0061] The aforementioned insulating mesh 4 has the following functions: First, the insulating mesh 4 separates the diaphragm 2 and the electrode plate 3, which can effectively prevent the diaphragm 2 from contacting the electrode plate 3 and causing dry burning; Second, the water flow can form local micro-turbulence during the process of passing through the mesh 411, which can accelerate the exhaust, inhibit scale deposition, and accelerate ion transfer; Third, for the triangular wave structure insulating mesh 4, the mesh 411 has different directions, so that water flow, ions, bubbles, etc. can pass through the mesh 411 from all directions, which can accelerate ion transfer and increase the turbulence effect; Fourth, the folded edge between two adjacent unit strips 41 forms a scraping part 410 that can rub against the adjacent diaphragm 2 or electrode plate 3, thereby realizing scraping and descaling.

[0062] In this embodiment, the insulating mesh 4 is made of a food-grade material that is resistant to high and low temperatures, strong acids and alkalis, and has good insulation properties, preferably food-grade Teflon. Adjacent unit strips 41 have an included angle and can open and close relative to each other. Therefore, the insulating mesh 4 as a whole is an elastic element that can stretch and contract along its length. The thickness of the insulating mesh 4 is denoted as H, and H changes accordingly during the stretching and contraction of the insulating mesh 4. Because the insulating mesh 4 has a spring-like free-movement characteristic, it can stretch and contract under the action of water flow, accelerating the bursting and discharge of air bubbles and promoting turbulence, thereby improving electrolysis efficiency and stability, and to a certain extent inhibiting scale deposition.

[0063] In this embodiment, the length direction of the insulating mesh 4 is vertical, which is basically consistent with the flow direction of the water in the electrode chamber 110. The water flowing from bottom to top can conveniently provide the insulating mesh 4, which has a triangular wave structure in the vertical direction, with the force of its expansion and contraction.

[0064] There are a pair of drive mechanisms 5, which correspond one-to-one with the electrode chambers 110. Each drive mechanism 5 includes a connecting rod assembly 51 and a drive element 52.

[0065] Specifically, the connecting rod assembly 51 is located in the corresponding electrode chamber 110, and there are two sets of them, which are arranged symmetrically with respect to the horizontal plane. Each connecting rod assembly 51 includes a first connecting rod 511 and a second connecting rod 512. The first ends of the first connecting rod 511 and the second connecting rod 512 are hinged to each other by a first pin 513, and the second end of each first connecting rod 511 is hinged to the corresponding annular sealing gasket 12 by a second pin 514.

[0066] The driving component 52 is an electric push rod, which is installed on the outside of the corresponding cover 11. It has a telescopic rod 521 that can extend and retract in the front-back direction. The telescopic rod 521 passes through the cover 11 and extends into the corresponding electrode chamber 110. It is sealed with the corresponding cover 11 by a sealing ring 522. The second end of the second connecting rod 512 is hinged to the end of the telescopic rod 521 by a third pin 515. A plug-in seat 5211 is provided near the end of the telescopic rod 521.

[0067] The bottom edge of the electrode sheet 3 is inserted into the plug socket 5211. The unit strip 41 at the head of the insulating mesh 4 is hooked to the outer periphery of the first pin 513 located above by the mounting part 412. The free end of the unit strip 41 at the tail of the insulating mesh 4 is suspended in the air.

[0068] In this way, when the drive unit 52 is activated, the telescopic rod 521 is extended and retracted. On the one hand, it can drive the electrode plate 3 to move synchronously in the front and back direction, adjusting the distance between the electrode plate 3 and the diaphragm 2, thereby achieving pH adjustment. On the other hand, it can drive the bottom end of the insulating mesh 4 to move in the extension and retraction direction of the insulating mesh 4, thereby adjusting the extension and retraction degree of the insulating mesh 4. At the same time, it can drive the insulating mesh 4 to move in the front and back direction, forming dynamic turbulence.

[0069] Driven by the aforementioned drive mechanism 5, the electrolytic cell has at least the following two states:

[0070] In the first state, such as Figure 5 and Figure 6 As shown, both the electrode sheet 3 and the diaphragm 2 are far away from the scraping part 410 of the insulating mesh 4, so that the insulating mesh 4 can expand and contract and move freely under the action of water flow;

[0071] In the second state, such as Figure 7 and Figure 8 As shown, both the electrode plate 3 and the diaphragm 2 are in contact with the scraping part 410 of the insulating mesh 4. In this way, on the one hand, the diaphragm 2 can be stably supported, and on the other hand, the scraping part 410 of the insulating mesh 4 can rub against the adjacent diaphragm 2 or electrode plate 3 under the action of water flow, so as to realize the scraping and descaling function on the surface of the electrode plate 3 and the diaphragm 2.

[0072] The working principle of this embodiment is as follows: During operation, the electrolyte enters the electrode chamber 110 through the inlet 111. A reduction reaction occurs at the interface between the cathode plate 3a and the solution, and an oxidation reaction occurs at the interface between the anode plate 3b and the solution to produce electrolyzed water. The electrode plate 3 can be driven to move by the drive mechanism 5 to adjust the distance between the electrode plate 3 and the diaphragm 2, thereby achieving pH adjustment.

[0073] (1) During conventional electrolysis, the electrolytic cell can be adjusted to the desired position via the drive mechanism 5. Figure 5 and Figure 6 In the first state shown, both the electrode plate 3 and the diaphragm 2 are far away from the scraping part 410 of the insulating mesh 4. In this way, during the electrolysis process, the insulating mesh 4 can expand and contract and move freely under the action of water flow. On the one hand, the insulating mesh 4 is separated between the diaphragm 2 and the electrode plate 3, which can effectively prevent the diaphragm 2 from contacting the electrode plate 3 and causing dry burning. On the other hand, the mesh 411 of the insulating mesh 4 forms local micro-turbulence, and the movement of the insulating mesh 4 forms dynamic turbulence, which can accelerate the exhaust, inhibit scale deposition, and accelerate ion transfer.

[0074] In addition, the insulating mesh 4 can be repeatedly extended and retracted by the drive mechanism 5 to enhance the turbulence effect;

[0075] (2) When descaling is required, the electrolytic cell can be adjusted to the desired position via the drive mechanism 5. Figure 7 and Figure 8 In the second state shown, both the electrode plate 3 and the diaphragm 2 are in contact with the scraping part 410 of the insulating mesh 4. In this way, on the one hand, the diaphragm 2 can be stably supported, and on the other hand, the scraping part 410 of the insulating mesh 4 can rub against the adjacent diaphragm 2 or electrode plate 3 under the action of water flow, so as to realize the scraping and descaling function of the surface of the electrode plate 3 and the diaphragm 2.

[0076] It should be noted that, for the electrolytic cell described above, since the thickness of the insulating mesh 4 changes only slightly during the expansion and contraction process, it is difficult to simultaneously ensure the free movement of the insulating mesh 4 in the first state and its support and scraping / descaling functions in the second state by relying solely on the movement of the insulating mesh 4. In this embodiment, the translational movement of the electrode plate 3 is combined with the expansion and contraction movement of the insulating mesh 4. On the one hand, this ensures that there is sufficient free space between the insulating mesh 4 and the electrode plate 3 in the first state for the insulating mesh 4 to move freely. On the other hand, it ensures that the switching between the two states can be achieved with a relatively short travel distance.

[0077] The advantages of this invention are as follows:

[0078] (1) By adding an insulating mesh 4 between the diaphragm 2 and the electrode 3, the diaphragm 2 is supported and isolated for protection. The insulating mesh 4 is designed as a dynamic insulating mesh with a triangular wave structure. The dynamic turbulence formed by the movement of the insulating mesh 4, the local turbulence formed by the mesh of the insulating mesh 4, and the scraping effect formed by the contact with the wall surface during movement greatly accelerate the discharge of air bubbles in the electrode 3, the diaphragm 2 and the water circuit of the electrolytic cell. Compared with the currently commonly used method of designing an exhaust port on the electrolytic cell, which requires additional sealing design and other auxiliary exhaust design, this accelerated exhaust method has a better exhaust effect, a simpler structure, and controllable cost, making it very suitable for small electrolytic cells.

[0079] (2) The dynamic turbulence formed by the movement of the insulating mesh 4 and the local turbulence formed by the mesh of the insulating mesh 4 are used to prevent scale deposition. The scraping action formed by the contact wall surface further plays a descaling role. Compared with the commonly used positive and negative electrode switching descaling method, it does not require the positive and negative electrodes to have a catalytic coating that can participate in the positive electrode reaction and frequent positive and negative electrode switching. It has lower cost, simpler structure, lower requirements for electrical control, and guaranteed electrode life.

[0080] (3) By utilizing the dynamic turbulence formed by the movement of the insulating mesh 4 and the local turbulence formed by the mesh openings of the insulating mesh 4, the diffusion and transfer of ions are accelerated, thereby improving the pH value and stability of the effluent.

[0081] (4) Without increasing additional costs, a single structure can simultaneously fix the diaphragm 2, adjust the spacing between the electrode plates 3 and the diaphragm 2, and solve the problem that small electrolyzers cannot adjust the pH by adjusting the flow rate due to the limited outflow of water. They need to disassemble and adjust the electrode spacing to adjust the pH. This provides a better user experience and simultaneously enhances the movement of the insulating mesh 4, accelerates the exhaust and ion diffusion and transfer, and improves the descaling effect.

Claims

1. An electrolytic cell comprising a cell body (1) having an electrode chamber (110), wherein a pair of spaced-apart electrode plates (3) are disposed within the electrode chamber (110), characterized in that: It also includes a drive mechanism for translating the electrode sheet (3) to adjust the distance between the two electrode sheets (3); The tank (1) is provided with a diaphragm (2) which divides the inner cavity of the tank (1) into at least two electrode chambers (110). Two electrode plates (3) are respectively disposed in the two electrode chambers (110). At least one of the electrode chambers (110) is provided with an insulating mesh (4) for separating adjacent diaphragms (2) and electrode plates (3).

2. The electrolytic cell according to claim 1, characterized in that: The insulating mesh (4) has at least one surface with an undulating waveform structure along its length.

3. The electrolytic cell according to claim 2, characterized in that: The waveform structure described is a triangular wave or a sine wave.

4. The electrolytic cell according to claim 3, characterized in that: The insulating mesh (4) has a scraping part (410) formed at the crest or trough that can rub against the adjacent diaphragm (2) or electrode sheet (3).

5. The electrolytic cell according to claim 1, characterized in that: The insulating mesh (4) is an elastic element that can stretch and contract along its length.

6. The electrolytic cell according to claim 5, characterized in that: The insulating mesh (4) has a foldable waveform structure.

7. The electrolytic cell according to claim 6, characterized in that: The insulating mesh (4) includes at least two unit strips (41) arranged sequentially along its length. Each unit strip (41) has multiple mesh holes (411) for fluid to pass through. The odd-numbered unit strip (41) in the arrangement direction is designated as the first unit strip (41a), and the even-numbered unit strip (41) in the arrangement direction is designated as the second unit strip (41b). The first side of the first unit strip (41a) is connected to the first side of the second unit strip (41b), and the second side of the second unit strip (41b) is connected to the second side of the first unit strip (41a). Adjacent unit strips (41) have an included angle and can be opened and closed relative to each other.

8. The electrolytic cell according to claim 7, characterized in that: The folded edge between two adjacent unit strips (41) forms a scraping part (410) that can rub against the adjacent diaphragm (2) or electrode sheet (3).

9. The electrolytic cell according to claim 8, characterized in that: It also includes a drive mechanism for moving the end of the insulating mesh (4) along the extension direction of the insulating mesh (4) to adjust the extension degree of the insulating mesh (4) so ​​that the electrolytic cell has at least two states: In the first state, both the electrode sheet (3) and the diaphragm (2) are far away from the scraping portion (410) of the insulating mesh (4); In the second state, at least one of the electrode sheet (3) and the diaphragm (2) is in contact with the scraping portion (410) of the insulating mesh (4).

10. The electrolytic cell according to claim 9, characterized in that: The extension and retraction direction of the insulating mesh (4) is consistent with the flow direction of the water in the electrode chamber (110), so that the scraping part (410) of the insulating mesh (4) in the second state can rub against the adjacent diaphragm (2) or electrode sheet (3) under the action of the water flow.

11. The electrolytic cell according to claim 10, characterized in that: The insulating mesh (4) and the electrode sheet (3) share the same driving mechanism (5).

12. The electrolytic cell according to claim 11, characterized in that: The drive mechanism (5) has at least two power output ends with mutually perpendicular output directions.

13. The electrolytic cell according to claim 12, characterized in that: The drive mechanism (5) includes: At least one set of linkage assemblies (51), each linkage assembly (51) includes a first link (511) and a second link (512), the first ends of the first link (511) and the second link (512) are hinged together by a first pin (513), and the second end of each first link (511) is hinged to the groove (1) by a second pin (514); The drive unit (52) has a telescopic rod (521) that can extend and retract along the moving direction of the electrode sheet (3), and the second end of the second connecting rod (512) is hinged to the end of the telescopic rod (521) by a third pin (515); The electrode sheet (3) is located on the telescopic rod (521), and the unit strip (41) at the head of the insulating mesh (4) is located on the first pin (513).

14. The electrolytic cell according to claim 13, characterized in that: Each of the electrode chambers (110) is provided with a conductive sheet (13) arranged perpendicular to the electrode sheet (3). The first end of the electrode sheet (3) is limited to the telescopic rod (521), and the second end of the electrode sheet (3) is provided with a guide sheet (31). The guide sheet (31) is in close contact with the conductive sheet (13) and can slide along the extension direction of the conductive sheet (13).

15. The electrolytic cell according to claim 13, characterized in that: The free ends of the unit strips (41) located at the tail of the insulating mesh (4) are freely suspended.

16. The electrolytic cell according to claim 13, characterized in that: The connecting rod assembly (51) is located inside the electrode chamber (110), and the driving member (52) is installed on the outside of the groove (1). The telescopic rod (521) of the driving member (52) extends through the side wall of the groove (1) into the electrode chamber (110).

17. The electrolytic cell according to any one of claims 1 to 16, characterized in that: Each electrode chamber (110) has a liquid inlet (111) and a liquid outlet (112) communicating with the electrode chamber (110) in the corresponding tank (1).

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