A kind of cleaning device for ion exchange membrane in ion exchange membrane electrochemical water treatment

Abstract

The application relates to an ion membrane cleaning device for ion membrane electrochemical water treatment, which effectively solves the problems of complicated cleaning operation, incomplete cleaning and influence on continuous production of the existing ion membrane cleaning device; the technical solution comprises the following steps: the ion membrane cleaning device for ion membrane electrochemical water treatment can cover all areas on both sides of ion membrane structure and middle area electrode structure of the cleaning spray pipe, avoids cleaning dead angles, and significantly improves cleaning uniformity; the angle adjusting mechanism can flexibly adjust the water spraying angle of the cleaning spray pipe, has strong cleaning pertinence, and can make the pollutants fall off more completely and the cleaning effect better when the membrane surface is cleaned due to the water spraying at the inclined angle; meanwhile, the main water treatment unit and the standby water treatment unit can ensure continuous treatment of waste water without interruption when the membrane surface in one group is cleaned, improve the water treatment efficiency and the cleaning efficiency of the ion membrane, and ensure the stable operation of the water treatment system.

Description

Technical Field

[0001] This invention relates to the field of ion membrane cleaning devices, and more particularly to an ion membrane cleaning device for ion membrane electrochemical water treatment. Background Technology

[0002] With the rapid development of electrochemical technology, technologies such as electroadsorption are receiving increasing attention. Electroadsorption technology, also known as capacitive deionization technology or capacitive desalination technology, has been gradually applied in wastewater treatment, drinking water treatment, and material conversion due to its high efficiency, low energy consumption, and simple process. However, with the increasing demand for industrial wastewater treatment, traditional electrochemical water treatment technologies are facing multiple challenges.

[0003] In existing technologies, ion-exchange membrane electrochemical water treatment technology is widely used in the water treatment field. Its core is to achieve selective ion migration through ion-exchange membranes, thereby achieving separation or purification. However, during long-term operation, the surfaces of the ion-exchange membrane and electrode plates are prone to clogging due to pollutant deposition, scaling, or microbial growth, leading to decreased treatment efficiency and increased energy consumption. Traditional cleaning methods often involve shutdown disassembly and cleaning or static chemical soaking, which are cumbersome to operate, incomplete in cleaning, and affect continuous production. Although some online cleaning devices exist in existing technologies, they generally suffer from limited cleaning coverage, fixed spray angles, and inability to adapt to complex membrane structures, resulting in uneven cleaning effects. In addition, the need for coordinated treatment of multiple compartments within the electrolysis tank also places higher demands on the structural design of the cleaning device. Therefore, there is an urgent need for a cleaning device that can achieve efficient dynamic cleaning, precisely adjust the spray angle, and adapt to multi-compartment electrolysis tank structures to improve the cleaning efficiency of ion-exchange membranes and the overall operational stability of the water treatment system.

[0004] In view of the above, we provide an ion membrane cleaning device for ion membrane electrochemical water treatment to solve the above problems. Summary of the Invention

[0005] To address the above issues, this invention provides an ion-exchange membrane cleaning device for electrochemical water treatment. This device significantly improves cleaning uniformity, allows for flexible adjustment of the spray angle of the cleaning nozzle to adapt to the cleaning needs of membrane surfaces with varying degrees of fouling, enhances cleaning targeting, and prevents contaminants or scale generated during water treatment from clogging the nozzles of the cleaning nozzle. This ensures that the cleaning device and the water treatment system can operate normally and stably for extended periods, improving water treatment efficiency and ion-exchange membrane cleaning efficiency, and guaranteeing the stable operation of the water treatment system.

[0006] An ion membrane cleaning device for ion membrane electrochemical water treatment includes an electrolysis tank, a transverse moving frame, and an eccentric swing mechanism. The electrolysis tank is characterized by having a plurality of ion membrane structures equidistantly arranged inside and an electrode structure parallel to the ion membrane structures inside the electrolysis tank. The plurality of ion membrane structures divide the electrolysis tank into a plurality of independent anode and cathode regions.

[0007] The electrode structure includes a positive electrode plate and a negative electrode plate. The positive electrode plate is disposed in the anode region and the negative electrode plate is disposed in the cathode region. Several anode regions and cathode regions are alternately and alternately arranged.

[0008] The top of the electrolysis tank is provided with a transverse drive mechanism, and a transverse moving frame is drivenly connected to the moving part of the transverse drive mechanism. An eccentric swing mechanism is provided in the middle of the upper surface of the transverse moving frame, and a main pipe is provided at the bottom of the moving end of the eccentric swing mechanism. A rotating mechanism that can drive the main pipe to rotate is provided at the top of the main pipe, and several rotary joints are equidistantly connected to the lower surface. Several vertical cleaning spray pipes are connected to the bottom of the main pipe through the rotary joints. An angle adjustment mechanism that can drive the cleaning spray pipe to adjust the water spray angle is provided at the top of the cleaning spray pipe.

[0009] Preferably, the mesh electrode structure is made of lead dioxide anode material, and each of the ion membrane structures has a mesh electrode structure attached to it by bolts on both sides, and all of the mesh electrode structures are electrically connected to the positive electrode of an external power source.

[0010] Preferably, the transverse drive mechanism includes a third drive motor, a lead screw, and a guide rod. The lead screw is splined to the output shaft of the third drive motor and rotatably connected to one side of the top of the electrolysis tank. The guide rod is fixedly connected to the other side of the top of the electrolysis tank and is horizontally parallel to the lead screw. The two ends of the transverse moving frame are respectively driven to the outside of the lead screw and sleeved to the outside of the guide rod. The eccentric swing mechanism includes a first drive motor, a rotating rod, a swing rod, and a horizontal hanger. The first drive motor is fixedly installed in the middle of the upper surface of the transverse moving frame. The rotating rod is splined to the drive shaft of the first drive motor, and the swing rod is rotatably connected to the bottom of the side of the rotating rod. The horizontal hanger is rotatably connected to the bottom end of the swing rod, and the main pipe is horizontally inserted inside the horizontal hanger.

[0011] Preferably, the rotating mechanism includes a second drive motor and a spur gear. A first spur gear is fixedly connected to the outside of the main pipe. The spur gear is connected to the output shaft of the second drive motor via a spline and is laterally rotatably connected inside the horizontal hanger. The spur gear meshes with the first spur gear on the main pipe. The second drive motor is fixedly installed at the end of the horizontal hanger.

[0012] Preferably, the ion membrane structure includes an ion membrane mounting frame and a cation membrane. The cation membrane is vertically fixed inside the ion membrane mounting frame, and the ion membrane mounting frame is vertically fixedly connected to the inside of the electrolysis tank. The number of ion membrane structures is five, and the five ion membrane structures are equidistantly fixed inside the electrolysis tank.

[0013] Preferably, the angle adjustment mechanism includes a fixed frame, an electric push rod, a rack and pinion, and a transmission gear. The fixed frame is fixedly connected to the bottom of the main pipe, and several cleaning nozzles vertically penetrate the fixed frame. A second spur gear is fixedly connected to the outer surface of each cleaning nozzle inside the fixed frame. The rack and pinion is fixedly connected to the movable end of the electric push rod and horizontally penetrates the inside of the fixed frame. The concave part of the rack and pinion meshes with the corresponding second spur gear through the transmission gear, and the convex part meshes directly with the corresponding second spur gear. The fixed rod part of the electric push rod is fixedly installed on the side of the fixed frame.

[0014] Preferably, the cleaning nozzles are vertically and equidistantly arranged on both sides, and there are ten cleaning nozzles in total. The ten cleaning nozzles are divided into five groups, and the five groups of cleaning nozzles are respectively arranged on both sides of the five cation membranes. The nozzles on both sides of each cleaning nozzle correspond to the adjacent positive plate (or negative plate) and cation membrane, respectively.

[0015] Preferably, the anode region includes a first anode region, a second anode region, and a third anode region, and the cathode region includes a first cathode region, a second cathode region, and a third cathode region. The first anode region and the first cathode region are close to each other. The second anode region is located on the side of the first cathode region away from the first anode region. The second cathode region is located on the side of the second anode region away from the first cathode region. The third anode region is located on the side of the second cathode region away from the second anode region. The third cathode region is located on the side of the third anode region away from the second cathode region.

[0016] Preferably, a first water inlet pipe is fixedly connected to the top of one side of the electrolysis tank near the first anode area and the first cathode area, communicating with the interior of the first water inlet pipe. A connecting pipe is fixedly connected to the bottom of the electrolysis tank on the side away from the first water inlet pipe. There are two connecting pipes, one of which connects the first anode area and the second anode area to each other, and the other connecting pipe connects the first cathode area and the second cathode area to each other. The first anode area, the first cathode area, the second anode area, and the second cathode area constitute an independent main water treatment unit. A second water inlet pipe is fixedly connected to the top of the electrolysis tank on the side away from the first water inlet pipe and near the third anode area and the third cathode area, communicating with the interior of the third anode area and the third cathode area. The third anode area and the third cathode area constitute an independent backup water treatment unit.

[0017] Preferably, the top of the electrolysis tank near the first inlet pipe is fixedly connected with four outlet pipes. The four outlet pipes correspond to and communicate with the second anode area, the second cathode area, the third anode area, and the third cathode area, respectively. There are three positive electrode plates and three negative electrode plates. The three positive electrode plates are vertically fixed in the first anode area, the second anode area, and the third anode area, respectively. The three negative electrode plates are vertically fixed in the first cathode area, the second cathode area, and the third cathode area, respectively.

[0018] The beneficial effects of the above technical solution are as follows:

[0019] This ion-exchange membrane cleaning device for electrochemical water treatment utilizes a mesh electrode structure to maintain an acidic environment on both sides of the membrane structure, effectively preventing scaling and extending its service life without cleaning. When cleaning is required, a lateral drive mechanism moves multiple cleaning nozzles laterally along the electrolysis tank, combined with an eccentric oscillating mechanism that swings the nozzles up and down. This ensures the cleaning nozzles cover the entire area of ​​the membrane structure and the electrode structure in the central region, eliminating cleaning dead zones and significantly improving cleaning uniformity. An angle adjustment mechanism allows for flexible adjustment of the spray angle to accommodate membranes with varying degrees of fouling. To meet the needs of membrane cleaning, this device enhances the targeted nature of cleaning and allows for more thorough removal of contaminants due to the angled water spray, resulting in better cleaning performance. When cleaning of the membrane surface and electrode structure is not required, the cleaning nozzle can be retracted to a horizontal position via a rotating mechanism, preventing it from contacting wastewater. This prevents contaminants or scale generated during water treatment from clogging the nozzle, ensuring the long-term normal and stable operation of the cleaning device and water treatment system. Furthermore, the use of a main water treatment unit and a backup water treatment unit allows for continuous wastewater treatment without interruption while one unit is cleaning the membrane surface, improving water treatment efficiency and ion membrane cleaning efficiency, and ensuring the stable operation of the water treatment system. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the electrode structure of the present invention in a disassembled state;

[0022] Figure 3 This is a schematic diagram showing the disassembled state of the cation membrane and mesh electrode structure of the present invention;

[0023] Figure 4 This is a schematic diagram showing the connection state of the cation membrane and the mesh electrode structure of the present invention;

[0024] Figure 5This is a schematic diagram of the first water inlet pipe and water outlet pipe of the present invention;

[0025] Figure 6 This is a schematic diagram of the lateral drive mechanism of the present invention;

[0026] Figure 7 This is a schematic diagram of the eccentric swing mechanism of the present invention;

[0027] Figure 8 This is a schematic diagram of the angle adjustment mechanism of the present invention;

[0028] Figure 9 This is a schematic diagram of the disassembled state of the rotating mechanism of the present invention;

[0029] Figure 10 This is a schematic diagram of the angle adjustment mechanism of the present invention in its disassembled state;

[0030] Figure 11 This is a schematic diagram of the side cross-sectional state of the present invention;

[0031] Figure 12 This is a top view schematic diagram of the present invention;

[0032] Figure 13 This is a frontal cross-sectional view of the present invention.

[0033] In the diagram: 1. Electrolysis tank; 2. Lateral moving frame; 3. Anode area; 301. First anode area; 302. Second anode area; 303. Third anode area; 4. Cathode area; 401. First cathode area; 402. Second cathode area; 403. Third cathode area; 5. Positive electrode plate; 6. Negative electrode plate; 7. Main pipe; 8. Rotary joint; 9. Cleaning nozzle; 10. First water inlet pipe; 11. Connecting pipe; 12. Second water inlet pipe; 13. Water outlet pipe; 14. First drive motor; 15. Rotating rod; 16. 17. Swing rod; 18. Horizontal hanger; 19. Second drive motor; 20. Spur gear rod; 21. First spur gear; 22. Fixed frame; 23. Electric push rod; 24. Bow-shaped rack; 25. Transmission gear; 26. Second spur gear; 27. Ion membrane mounting frame; 28. Cation membrane; 29. ​​Drain pipe; 30. Inclined plate; 31. Third drive motor; 32. Lead screw; 33. Guide rod; 34. Hot air blower; 35. Temperature sensor; 36. Limiting frame; 37. Limiting baffle; 38. Mesh electrode structure. Detailed Implementation

[0034] The foregoing and other technical contents, features and effects of the present invention are described in conjunction with the appendix below. Figures 1 to 13 As will be clearly shown in the detailed description of the embodiments, all structural contents mentioned in the following embodiments are with reference to the accompanying drawings.

[0035] This embodiment provides an ion-exchange membrane cleaning device for ion-exchange membrane electrochemical water treatment, as shown in the attached figure. Figure 1-13 As shown, the system includes an electrolysis tank 1, a transverse moving frame 2, and an eccentric swing mechanism. A protective cover is fixedly connected to the top of the electrolysis tank 1, and an exhaust pipe can be connected to the protective cover to centrally discharge the gases generated during electrochemical treatment. This prevents the direct discharge of gases, avoiding harm to workers and preventing air pollution. A hot air blower 33 and a temperature sensor 34 can also be installed on the top side of the electrolysis tank 1. When the temperature sensor 34 detects that the temperature inside the electrolysis tank 1 is low, potentially causing water to freeze on the side wall, the hot air blower 33 can be controlled by the control unit. Hot air is blown into the interior of electrolysis tank 1 to prevent ice formation inside the tank and ensure normal water treatment. Several ion exchange membrane structures are equidistantly arranged inside electrolysis tank 1. Each ion exchange membrane structure includes an ion exchange membrane mounting frame 26 and a cation exchange membrane 27. The cation exchange membrane 27 only allows cations to pass through and isolates anions, thus achieving electrochemical separation. The cation exchange membrane 27 is vertically fixed inside the ion exchange membrane mounting frame 26, which is vertically fixedly connected to the interior of electrolysis tank 1. There are five ion exchange membrane structures, which are equidistantly fixed inside electrolysis tank 1.

[0036] Each ion exchange membrane structure has a mesh electrode structure 37 fixedly installed on both sides to prevent scaling on the surface of the membrane structure. The mesh electrode structure 37 is made of lead dioxide anode material, and each ion exchange membrane structure has a mesh electrode structure 37 fixedly installed on both sides by bolts. Multiple mesh electrode structures 37 are electrically connected to the positive terminal of an external power supply. The sides of the mesh electrode structure 37 have large mesh gaps, which will not block cations from passing through the cation exchange membrane 27, nor will they affect the rinsing of the cation exchange membrane 27 by the rinsing nozzle 9. When the water treatment device is treating wastewater, the mesh electrode structures 37 are all energized and connected to the positive terminal of the power supply, thereby enabling an oxidation reaction to occur around the mesh electrode structure 37 on both sides of each cation exchange membrane 27, generating H2O. + This ensures that both sides of the cation exchange membrane 27 are always in an acidic environment, effectively reducing scaling on the surface of the cation exchange membrane 27 and greatly reducing the risk of clogging. This allows the water treatment device to operate for a longer period of time without cleaning the cation exchange membrane 27, thus improving water treatment efficiency.

[0037] The electrolytic cell 1 is equipped with an electrode structure parallel to the ion membrane structure. Several ion membrane structures divide the electrolytic cell 1 into several independent anode regions 3 and cathode regions 4. The anode region 3 includes a first anode region 301, a second anode region 302, and a third anode region 303. The cathode region 4 includes a first cathode region 401, a second cathode region 402, and a third cathode region 403. The first anode region 301 and the first cathode region 401 are close to each other. The second anode region 302 is located on the side of the first cathode region 401 away from the first anode region 301. The second cathode region 402 is located on the side of the second anode region 302 away from the first cathode region 401. The third anode region 303 is located on the side of the second cathode region 402 away from the second anode region 302. The third cathode region 403 is located on the side of the third anode region 303 away from the second cathode region 402.

[0038] On one side of the electrolytic tank 1, near the top of the first anode region 301 and the first cathode region 401, a first water inlet pipe 10 is fixedly connected to the top, communicating with the interior of the pipe. On the bottom of the electrolytic tank 1, away from the first water inlet pipe 10, a connecting pipe 11 is fixedly connected. There are two connecting pipes 11, one of which connects the first anode region 301 and the second anode region 302, and the other connecting pipe 11 connects the first cathode region 401 and the second cathode region 402. The first anode region 301, the first cathode region 401, and the second... The anode region 302 and the second cathode region 402 form an independent main water treatment unit. A water circulation path is formed by a first inlet pipe 10 and two connecting pipes 11 at the bottom. Wastewater enters the first anode region 301 and the first cathode region 401 from the two first inlet pipes 10. Water in the first anode region 301 and the first cathode region 401 flows into the second anode region 302 and the second cathode region 402 through the connecting pipes 11. This portion of water first passes through the positive and negative electrode plates 5 in the first anode region 301 and the first cathode region 401. The wastewater undergoes electrochemical treatment 6, followed by secondary electrochemical treatment via the positive and negative electrode plates 5 and 6 in the second anode region 302 and the second cathode region 402. This extends the electrochemical treatment path and time, resulting in more thorough wastewater treatment. Since only the tops of the second anode region 302 and the second cathode region 402 have outlet pipes 13, after electrochemical treatment, the water in the main water treatment unit can only be discharged from the outlet pipe 13 at the top of the second anode region 302. Water in the first cathode area 401 and the second cathode area 402 can only be discharged from the outlet pipe 13 at the top of the second cathode area 402, so that the wastewater undergoes more thorough electrochemical treatment; the top of the electrolysis tank 1 on the side away from the first inlet pipe 10 and close to the third anode area 303 and the third cathode area 403 are fixedly connected to the second inlet pipe 12, which communicates with the interior of the tank. The third anode area 303 and the third cathode area 403 form an independent backup water treatment unit, which is independently supplied with water through the second inlet pipe 12 and can be switched to use when the main unit is under maintenance.

[0039] Four outlet pipes 13 are fixedly connected to the top of the electrolysis tank 1 near the first inlet pipe 10. The four outlet pipes 13 correspond to and are connected to the second anode area 302, the second cathode area 402, the third anode area 303 and the third cathode area 403 respectively. The main water treatment unit and the backup water treatment unit discharge the treated water through the outlet pipes 13 at the top. Six drain pipes 28 are fixedly connected to the bottom of the electrolysis tank 1 near the outlet pipes 13. The six drain pipes 28 are connected to the interior of the first anode area 301, the first cathode area 401, the second anode area 302, the second cathode area 402, the third anode area 303 and the third cathode area 403 respectively. An inclined plate 29 is fixedly connected to the bottom of the electrolysis tank 1. The inclined plate 29 is inclined toward the drain pipe 28, so that the sediment generated during water treatment in the electrolysis tank 1 accumulates on the drain pipe 28 side, thereby facilitating the discharge of the bottom sediment.

[0040] The electrode structure includes a positive electrode plate 5 and a negative electrode plate 6. The positive electrode plate 5 is disposed in the anode region 3, and the negative electrode plate 6 is disposed in the cathode region 4. Both the positive electrode plate 5 and the negative electrode plate 6 are fixedly installed inside the electrolysis tank 1 by a motor support frame. The motor support frame can be electrically connected to an external circuit, allowing the positive electrode plate 5 and the negative electrode plate 6 to be energized. After the positive electrode plate 5 and the negative electrode plate 6 are energized, an electric field is formed that drives ion migration, thereby enabling cations in the anode region 3 to move through the cation membrane 27 into the cathode region 4. Several anode regions 3 and cathode regions 4 are arranged alternately. There are three positive electrode plates 5 and three negative electrode plates 6. The three positive electrode plates 5 are vertically fixedly installed in the first... Within the first anode region 301, the second anode region 302, and the third anode region 303, three negative electrode plates 6 are vertically fixed within the first cathode region 401, the second cathode region 402, and the third cathode region 403, respectively, ensuring independent electrochemical reactions in each region. The water in the anode region 3 undergoes an oxidation reaction after energization of the electrode structure, while the water in the cathode region 4 undergoes a reduction reaction, thus increasing the acidity of the anode region and the alkalinity of the cathode region. Cations in the anode region 3 migrate through the cation exchange membrane 27 into the cathode region 4, while anions are isolated by the cation exchange membrane 27. Simultaneously, metal cations entering the cathode region 4 react with OH groups within the cathode region 4. ﹣ Ions undergo chemical reactions to form metal hydroxide precipitates, such as

[0041] Ca 2+ +2OH ﹣ →Ca(OH)2↓

[0042] Mg 2+ +2OH ﹣ →Mg(OH)2↓

[0043] The resulting precipitate accumulates on the inclined plate 29 and can be discharged through the drain pipe 28, thus treating and recycling the wastewater through electrochemical water treatment. Secondly, if the wastewater contains heavy metal ions, the reduction reaction occurring in the cathode region 4 will also reduce the heavy metal ions (such as Cu). 2+ Ni 2+ wait):

[0044] Cu 2+ +2e ﹣ →Cu↓

[0045] Ni 2+ +2e ﹣ →Ni↓

[0046] Metallic elements (Cu, Ni, etc.) will deposit on the surface of the negative electrode plate 6, and the surface can be cleaned by cleaning nozzle 9.

[0047] The top of the electrolysis tank 1 is equipped with a transverse drive mechanism, and the transverse moving frame 2 is drivenly connected to the moving part of the transverse drive mechanism. Limiting frames 35 are fixedly installed inside the electrolysis tank 1 near both ends of the lead screw 31. A limiting baffle 36 is fixedly connected to the bottom of the transverse moving frame 2 at the corresponding position of the limiting frame 35. When the transverse moving frame 2 moves to its end limit position, the limiting baffle 36 abuts against the limiting frame 35, thereby limiting the position of the transverse moving frame 2 and preventing the cleaning nozzle 9 from colliding with the inner wall of the electrolysis tank 1. The transverse drive mechanism includes a third drive motor 30, a lead screw 31, and a guide rod 32. The lead screw 31 is connected to the output shaft of the third drive motor 30 via a spline and is rotatably connected to the electrolysis tank. On one side of the top of the electrolysis tank 1, a bearing seat is fixedly connected to the side of the side near the lead screw 31, and the lead screw 31 is rotatably connected in the bearing seat. A mounting bracket is fixedly connected to the end of the bearing seat, and the third drive motor 30 is fixedly mounted on the mounting bracket. The guide rod 32 is fixedly connected to the other side of the top of the electrolysis tank 1 and is set horizontally parallel to the lead screw 31. The two ends of the transverse moving frame 2 are respectively driven to the outside of the lead screw 31 and sleeved on the outside of the guide rod 32. The third drive motor 30 drives the lead screw 31 to rotate, which can drive the transverse moving frame 2 to move back and forth along the direction of the guide rod 32, thereby driving several cleaning nozzles 9 to move back and forth along the direction of the cation membrane 27, which facilitates the overall cleaning of the cation membrane 27.

[0048] An eccentric swing mechanism is provided in the middle of the upper surface of the transverse moving frame 2, and a main pipe 7 is provided at the bottom of the movable end of the eccentric swing mechanism. The main pipe 7 is connected to the external water channel. The eccentric swing mechanism includes a first drive motor 14, a rotating rod 15, a swing rod 16, and a horizontal hanger 17. The first drive motor 14 is fixedly installed in the middle of the upper surface of the transverse moving frame 2. The rotating rod 15 is connected to the drive shaft of the first drive motor 14 through a spline, and the swing rod 16 is rotatably connected to the bottom of the side of the rotating rod 15. The horizontal hanger 17 is rotatably connected to the bottom end of the swing rod 16, and the main pipe 7 is horizontally inserted inside the horizontal hanger 17. When the first drive motor 14 drives the rotating rod 15 to rotate, the rotating rod 15 can drive the swing rod 16 to make eccentric movements, thereby driving the bottom horizontal hanger 17 and its cleaning nozzle 9 to move up and down reciprocally, so that the nozzles on the cleaning nozzle 9 can clean the two sides of the cation membrane 27 in an up-and-down moving manner, making the cleaning more thorough.

[0049] The top of the main pipe 7 is equipped with a rotating mechanism that can drive it to rotate. The rotating mechanism includes a second drive motor 18 and a spur gear 19. A first spur gear 20 is fixedly connected to the outside of the main pipe 7. The spur gear 19 is connected to the output shaft of the second drive motor 18 via a spline and is laterally rotatably connected to the inside of the horizontal hanger 17. The spur gear 19 meshes with the first spur gear 20 on the main pipe 7. The second drive motor 18 is fixedly installed at the end of the horizontal hanger 17. When the second drive motor 18 drives the spur gear 19 to rotate, it can drive the main pipe 7 to rotate through the first spur gear 20. The fixed frame 21 is fixedly connected to the main pipe 7, and the cleaning nozzle 9 is inserted into the fixed frame 21. Therefore, when the main pipe 7 rotates 90 degrees, it can drive all the cleaning nozzles 9 to swing horizontally, thereby fixing them in a horizontal state and at the top of the electrolysis tank 1. They do not come into contact with the water in the electrolysis tank 1, which can prevent the precipitates generated during electrochemical treatment from clogging the nozzles of the cleaning nozzles 9 and extend the service life of the cleaning nozzles 9.

[0050] The lower surface of the main pipe 7 is equidistantly connected to several rotary joints 8. The bottom end of the main pipe 7 is connected to several vertical cleaning nozzles 9 via the rotary joints 8. The rotary joints 8 ensure that the cleaning nozzles 9 can rotate normally without leakage at the connection point. Ten cleaning nozzles 9 are vertically and equidistantly positioned on both sides of each nozzle 9. These ten nozzles are divided into five groups, each group positioned on either side of one of the five cation membranes 27. Two cleaning nozzles 9 within the same anode region 3 or cathode region 4 are positioned on either side of the corresponding positive electrode plate 5 or negative electrode plate 6. The nozzles on both sides of each cleaning nozzle 9 are... The nozzles correspond to the adjacent positive electrode plate 5 (or negative electrode plate 6) and cation membrane 27 respectively. When it is necessary to clean the cation membrane 27 and the electrode structure, the water in the area to be cleaned is first discharged from the drain pipe 28 and the water intake is stopped, so that both sides of the cation membrane 27 are in a waterless environment. At the same time, the cleaning nozzle 9 is rotated to a vertical state by the rotating mechanism, and then water is introduced into the main pipe 7 through the external pipeline. With the help of the lateral drive mechanism and the eccentric swing mechanism, the two sides of the cation membrane 27 and the electrode structure in the middle area, as well as the side of the farthest positive electrode plate 5 and negative electrode plate 6 that are close to each other, are thoroughly cleaned.

[0051] The top of the cleaning nozzle 9 is equipped with an angle adjustment mechanism that can adjust the spray angle. The angle adjustment mechanism includes a fixed frame 21, an electric push rod 22, a rack and pinion 23, and a transmission gear 24. The fixed frame 21 is fixedly connected to the bottom of the main pipe 7, and several cleaning nozzles 9 vertically pass through the fixed frame 21. The outer surface of several cleaning nozzles 9, inside the fixed frame 21, is fixedly connected to a second spur gear 25. The rack and pinion 23 is fixedly connected to the end of the movable rod of the electric push rod 22 and horizontally passes through the inside of the fixed frame 21. The concave part of the rack and pinion 23 interacts with the corresponding second spur gear through the transmission gear 24. The wheel 25 meshes and the protruding part directly meshes with the corresponding second spur gear 25. The fixed rod part of the electric push rod 22 is fixedly installed on the side of the fixed frame 21. When the movable rod of the electric push rod 22 pushes the bow-shaped rack 23 to move laterally, the protruding part of the bow-shaped rack 23 drives the corresponding cleaning nozzle 9 to rotate clockwise through the second spur gear 25, while the concave part of the bow-shaped rack 23 drives the corresponding cleaning nozzle 9 to rotate counterclockwise through the transmission gear 24. This enables the cleaning nozzles 9 on both sides of the cation membrane 27 to rotate synchronously in opposite directions, so that the nozzles are all sprayed at the same part on both sides of the cation membrane 27.

[0052] When cleaning the cation exchange membrane 27 and the electrode structure, the nozzle of the cleaning nozzle 9 is first aligned perpendicularly with the cation exchange membrane 27 and the electrode structure for reciprocating cleaning. Then, the angle between the nozzle of the cleaning nozzle 9 near the cation exchange membrane 27 and the side of the cation exchange membrane 27 is adjusted to between 30 and 60 degrees using the angle adjustment mechanism. The cleaning nozzle 9 is then driven by the lateral drive mechanism to reciprocate along the outside of the cation exchange membrane 27. When the direction of movement of the cleaning nozzle 9 is the same as the direction of the nozzle on its side near the cation exchange membrane 27, The water sprayed from the nozzle can be tilted to rinse the side of the cation membrane 27, which is similar to the principle of using a shovel to remove dust from the ground. The tilted water rinses the side of the cation membrane 27, which can more thoroughly clean the impurities on the side of the cation membrane 27, thereby further improving the cleaning effect on the cation membrane 27. Similarly, when the moving direction of the cleaning nozzle 9 is the same as the direction of the nozzle on the side of its side closest to the electrode structure, the water sprayed from the nozzle can be tilted to rinse the side of the electrode structure, which can also more thoroughly clean the impurities on the side of the electrode structure.

[0053] The above description is only for illustrating the present invention and should be understood as not being limited to the above embodiments. Various modifications that conform to the spirit of the present invention are within the protection scope of the present invention.

Claims

1. An ion-exchange membrane cleaning device for ion-exchange membrane electrochemical water treatment, comprising an electrolysis tank (1), a transverse moving frame (2), and an eccentric swing mechanism, characterized in that, The electrolysis tank (1) has several ion membrane structures arranged at equal intervals inside, and an electrode structure parallel to the ion membrane structure is arranged inside the electrolysis tank (1). Each ion membrane structure has a mesh electrode structure (37) fixedly installed on both sides to prevent scaling on the surface of the ion membrane structure. The several ion membrane structures divide the electrolysis tank (1) into several independent anode areas (3) and cathode areas (4). The electrode structure includes a positive electrode plate (5) and a negative electrode plate (6). The positive electrode plate (5) is disposed in the anode region (3) and the negative electrode plate (6) is disposed in the cathode region (4). Several anode regions (3) and cathode regions (4) are arranged alternately. The top of the electrolysis tank (1) is provided with a transverse drive mechanism and the transverse moving frame (2) is connected to the moving part of the transverse drive mechanism. The middle of the upper surface of the transverse moving frame (2) is provided with an eccentric swing mechanism and the bottom of the moving end of the eccentric swing mechanism is provided with a main pipe (7). The top of the main pipe (7) is provided with a rotating mechanism that can drive it to rotate and the lower surface is equidistantly connected with several rotary joints (8). The bottom end of the main pipe (7) is connected to several vertical cleaning nozzles (9) through the rotary joints (8). The top of the cleaning nozzle (9) is provided with an angle adjustment mechanism that can drive it to adjust the water spray angle.

2. The ion-exchange membrane cleaning device for ion-exchange membrane electrochemical water treatment according to claim 1, characterized in that, The mesh electrode structure (37) is made of lead dioxide anode material, and each of the ion membrane structures is fixedly mounted with a mesh electrode structure (37) attached to it by bolts on both sides. All of the mesh electrode structures (37) are electrically connected to the positive electrode of an external power source.

3. The ion-exchange membrane cleaning device for ion-exchange membrane electrochemical water treatment according to claim 1, characterized in that, The transverse drive mechanism includes a third drive motor (30), a lead screw (31), and a guide rod (32). The lead screw (31) is splined to the output shaft of the third drive motor (30) and rotatably connected to one side of the top of the electrolytic tank (1). The guide rod (32) is fixedly connected to the other side of the top of the electrolytic tank (1) and is horizontally parallel to the lead screw (31). The two ends of the transverse moving frame (2) are respectively driven to the outside of the lead screw (31) and sleeved on the outside of the guide rod (32). The eccentric swing mechanism... The structure includes a first drive motor (14), a rotating rod (15), a swing rod (16), and a horizontal hanger (17). The first drive motor (14) is fixedly installed in the middle of the upper surface of the transverse moving frame (2). The rotating rod (15) is connected to the drive shaft of the first drive motor (14) by a spline, and the swing rod (16) is rotatably connected to the bottom of the side of the rotating rod (15). The horizontal hanger (17) is rotatably connected to the bottom end of the swing rod (16), and the main pipe (7) is horizontally inserted inside the horizontal hanger (17).

4. The ion-exchange membrane cleaning device for ion-exchange membrane electrochemical water treatment according to claim 3, characterized in that, The rotating mechanism includes a second drive motor (18) and a spur gear (19). A first spur gear (20) is fixedly connected to the outside of the main pipe (7). The spur gear (19) is connected to the output shaft of the second drive motor (18) by a spline and is laterally rotatably connected to the inside of the horizontal hanger (17). The spur gear (19) meshes with the first spur gear (20) on the main pipe (7). The second drive motor (18) is fixedly installed at the end of the horizontal hanger (17).

5. The ion-exchange membrane cleaning device for ion-exchange membrane electrochemical water treatment according to claim 4, characterized in that, The angle adjustment mechanism includes a fixed frame (21), an electric push rod (22), a bow-shaped rack (23), and a transmission gear (24). The fixed frame (21) is fixedly connected to the bottom of the main pipe (7), and several cleaning nozzles (9) are vertically penetrating the fixed frame (21). The outer surfaces of several cleaning nozzles (9) inside the fixed frame (21) are fixedly connected to a second spur gear (25). The bow-shaped rack (23) is fixedly connected to the movable rod end of the electric push rod (22) and horizontally penetrates the inside of the fixed frame (21). The concave part of the bow-shaped rack (23) meshes with the corresponding second spur gear (25) through the transmission gear (24), and the convex part directly meshes with the corresponding second spur gear (25). The fixed rod part of the electric push rod (22) is fixedly installed on the side of the fixed frame (21).

6. The ion-exchange membrane cleaning device for ion-exchange membrane electrochemical water treatment according to claim 1, characterized in that, The ion membrane structure includes an ion membrane mounting frame (26) and a cation membrane (27). The cation membrane (27) is vertically fixed inside the ion membrane mounting frame (26), and the ion membrane mounting frame (26) is vertically fixed inside the electrolytic tank (1). The number of ion membrane structures is five, and the five ion membrane structures are equidistantly fixed inside the electrolytic tank (1).

7. The ion-exchange membrane cleaning device for ion-exchange membrane electrochemical water treatment according to claim 6, characterized in that, The cleaning nozzle (9) has nozzles vertically spaced at equal intervals on both sides, and there are ten cleaning nozzles (9). The ten cleaning nozzles (9) are divided into five groups, and the five groups of cleaning nozzles (9) are respectively set on both sides of the five cation membranes (27). The nozzles on both sides of each cleaning nozzle (9) correspond to the adjacent positive electrode plate (5) (or negative electrode plate (6)) and cation membrane (27).

8. The ion-exchange membrane cleaning device for ion-exchange membrane electrochemical water treatment according to claim 1, characterized in that, The anode region (3) includes a first anode region (301), a second anode region (302), and a third anode region (303). The cathode region (4) includes a first cathode region (401), a second cathode region (402), and a third cathode region (403). The first anode region (301) and the first cathode region (401) are close to each other. The second anode region (302) is located on the side of the first cathode region (401) away from the first anode region (301). The second cathode region (402) is located on the side of the second anode region (302) away from the first cathode region (401). The third anode region (303) is located on the side of the second cathode region (402) away from the second anode region (302). The third cathode region (403) is located on the side of the third anode region (303) away from the second cathode region (402).

9. The ion-exchange membrane cleaning device for ion-exchange membrane electrochemical water treatment according to claim 8, characterized in that, The electrolytic tank (1) has a first water inlet pipe (10) fixedly connected to the top of both the first anode region (301) and the first cathode region (401) on one side. A connecting pipe (11) is fixedly connected to the bottom of the electrolytic tank (1) on the side away from the first water inlet pipe (10). There are two connecting pipes (11), one of which connects the first anode region (301) and the second anode region (302) to each other, and the other connecting pipe connects the first cathode region (401) and the second cathode region (401). The zones (402) are interconnected. The first anode zone (301), the first cathode zone (401), the second anode zone (302), and the second cathode zone (402) form an independent main water treatment unit. The top of the electrolysis tank (1) away from the first inlet pipe (10) and close to the third anode zone (303) and the third cathode zone (403) are fixedly connected to the second inlet pipe (12) which communicates with the inside. The third anode zone (303) and the third cathode zone (403) form an independent standby water treatment unit.

10. The ion-exchange membrane cleaning device for ion-exchange membrane electrochemical water treatment according to claim 9, characterized in that, The electrolysis tank (1) has four outlet pipes (13) fixedly connected to the top of the side near the first inlet pipe (10). The four outlet pipes (13) correspond to the second anode area (302), the second cathode area (402), the third anode area (303), and the third cathode area (403) and are connected to their interiors. The positive electrode plate (5) and the negative electrode plate (6) are three in number. The three positive electrode plates (5) are vertically fixed in the first anode area (301), the second anode area (302), and the third anode area (303), respectively. The three negative electrode plates (6) are vertically fixed in the first cathode area (401), the second cathode area (402), and the third cathode area (403), respectively.

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