Efficient electrocatalytic oxidation device for sewage treatment

Abstract

The invention discloses an efficient electrocatalytic oxidation device for sewage treatment, and particularly relates to the technical field of sewage treatment.The efficient electrocatalytic oxidation device is characterized in that a rotating disc rotates in a treatment box to drive a plurality of electrode sets which are annularly arranged to synchronously revolve and rotate along with the rotating disc, and meanwhile, each electrode set rotates; a disturbance-enhanced water flow environment is formed around the electrode group; the enhanced flow field can improve the mass transfer efficiency of sewage and the surfaces of the electrodes and reduce the polarization phenomenon of the electrodes, so that each electrode group is in an effective reaction state; according to the cleaning device, the self-rotating electrode sets are matched to make contact with the sliding cleaning outer ring, the electrode sets are scraped and rubbed along with movement of the rotating disc, the scraping and washing force is enhanced, oil stains, bubbles and fine impurities attached to the surfaces of the electrode sets are made to fall off more easily under the dual-rotation effect, and therefore the electrode sets are kept in the active state for a long time, and the electro-catalysis treatment efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a high-efficiency electrocatalytic oxidation device for wastewater treatment. Background Technology

[0002] With the rapid development of industrialization and urbanization, the amount of recalcitrant organic wastewater generated by industries such as chemical, pharmaceutical, printing and dyeing, coking, and landfill leachate is gradually increasing. This type of wastewater generally has characteristics such as complex composition, poor biodegradability, high color, strong toxicity, and high salt content. Traditional biological, coagulation-sedimentation, and physicochemical methods often suffer from low removal efficiency, long treatment cycles, and the potential for secondary pollution, making it difficult to meet increasingly stringent emission standards. Electrochemical oxidation technology, as a novel advanced oxidation method, has advantages such as strong oxidation capacity, mild reaction conditions, no chemical reagent addition, and ease of automation. This technology deeply oxidizes and mineralizes recalcitrant organic matter by generating strong oxide species such as hydroxyl radicals on the anode surface.

[0003] A search revealed that the invention patent with publication number CN117902691A discloses an electrocatalytic oxidation wastewater treatment device. The floating plate drives the fixed plate to rise and fall, and the fixed plate drives the cleaning component to rise and fall, so that the cleaning component can always be in contact with the surface of the wastewater, thereby cleaning the dirt on the surface of the wastewater and solving the problem of poor dirt cleaning effect.

[0004] When existing electrodes operate in wastewater environments for extended periods, they are easily covered by oil films, mud films, bubbles, and fine solid impurities, leading to decreased electrode surface activity and reduced reaction mass transfer efficiency. This results in severe electrode polarization, low electrocatalytic oxidation efficiency, long treatment cycles, and high maintenance frequency. Furthermore, due to the lack of an effective self-cleaning structure, electrode surface contamination is difficult to remove in a timely manner, requiring manual disassembly and cleaning after long-term operation, which affects the continuity and stability of the equipment. Summary of the Invention

[0005] The purpose of this invention is to provide a high-efficiency electrocatalytic oxidation device for wastewater treatment to solve the problems mentioned in the background art.

[0006] The main technical problem solved by this invention is: When existing electrodes are operated in wastewater environments for a long time, they are easily covered by oil films, mud films, bubbles and fine solid impurities, which leads to a decrease in electrode surface activity and a reduction in reaction mass transfer efficiency, resulting in severe electrode polarization and low electrocatalytic oxidation efficiency.

[0007] This invention can be achieved through the following technical solutions: A high-efficiency electrocatalytic oxidation device for wastewater treatment includes a treatment tank, an opening on the upper surface of the treatment tank, and a discharge port facing the opening on one side of the upper end of the treatment tank. A collection unit for pushing floating matter in wastewater is installed inside the opening, and an upper filter screen is installed below the opening. An electrolysis unit is rotatably located below the upper filter screen; The electrolysis unit includes a rotating disk rotatably mounted on the inner wall of the treatment tank. Several electrode groups for electrolyzing wastewater are rotatably mounted on the surface of the rotating disk. A stud is fixed on the middle surface of the rotating disk. A cleaning unit that contacts the several electrode groups is threaded onto the outside of the stud. The several electrode groups are arranged in a ring, and the center of the arrangement is consistent with the center of the rotating disk. The cleaning unit includes a central ring that is threadedly connected to a stud, and a cleaning outer ring is mounted on the outer wall of the central ring through a limiting plate. The outer surface of the cleaning outer ring is fitted to each rotating electrode assembly. The outer side of the electrode assembly is provided with a filtration unit that is fixed to the edge surface of the rotating disk; A lower filter screen is located directly below the rotating disk.

[0008] A further technical improvement of the present invention is that: a toothed disc is fixed inside the processing box, a cross is installed at the center of the toothed disc, the center of the cross is fixed to the middle surface of the rotating disc, and gears that mesh with the inner side of the toothed disc are installed at the four ends of the cross; the electrode group corresponding to the gear is rotatably arranged. A drive rod driven by an external forward and reverse motor is fixed in the middle of the cross.

[0009] A further technical improvement of the present invention is that a limiting rod that slides with the limiting plate is installed on the front side of the inside of the processing box, and the end of the limiting rod is provided with a blocking protrusion that does not contact the rotating disk.

[0010] A further technical improvement of the present invention is that: the filtration unit includes two outer ring blocks, and a plurality of connecting plates for supporting the sieve are installed between the two outer ring blocks. The inner wall of the connecting plate is arc-shaped and its inner arc surface is flush with the inner arc surface of the outer ring block. The inner side of the outer ring block is provided with an installation ring cavity into which the edge of the sieve mesh enters, and both ends of the connecting plate are provided with installation bolts for fixing the sieve mesh.

[0011] A further technical improvement of the present invention is that: the screening screen is provided with screening sections in four directions, and the diameter of the screen holes in each screening section decreases sequentially; The outer side of the sieve is flush with the outer wall of the two outer ring blocks, and the outer wall of the sieve is respectively attached to the upper filter screen and the lower filter screen.

[0012] A further technical improvement of the present invention is that: a drive frame is horizontally slidably installed below the opening, an arc plate is fixed at the end of the drive frame, and a pin for clearing the sieve holes of the sieve section is fixed on the inner wall of the arc plate.

[0013] A further technical improvement of the present invention is that the collection unit includes a material-dispensing plate that is rotatably disposed in the opening, and a counterweight percolation disc that moves vertically is provided on one side of the material-dispensing plate. The bottom surface of the inner cavity of the counterweight percolation plate is inclined downward toward the side away from the feed plate.

[0014] A further technical improvement of the present invention is that: a support is provided above the opening, and a traction steel wire driven by a winch is installed on the lower surface of the inner top plate of the support, and the end of the traction steel wire is fixed to the upper edge of the counterweight percolation disc; The counterweight percolation plate has a groove on one side and percolation holes on its bottom surface, and a lifting guide that slides along the inner wall of the support is fixed to the upper edge of the counterweight percolation plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The rotation of the rotating disk inside the treatment tank drives several circularly arranged electrode groups to revolve and rotate synchronously with the disk. At the same time, each electrode group rotates on its own, creating a water flow environment with enhanced disturbance around the electrode group. The enhanced flow field can improve the mass transfer efficiency between wastewater and the electrode surface, reduce electrode polarization, and keep each electrode group in an effective reaction state. In conjunction with the contact between the rotating electrode group and the sliding cleaning outer ring, the rotating disk scrapes and rubs each electrode group, enhancing the scraping force. This makes it easier for oil, bubbles, and fine impurities attached to the surface of each electrode group to fall off under the dual rotation action, thereby keeping each electrode group in an active state for a long time and improving the electrocatalytic treatment efficiency. 2. The basic frame of the filtration unit is composed of two outer ring blocks. The screen is arranged in a ring shape and installed between the two outer ring blocks. The edge of the screen is embedded in the mounting ring cavity inside the outer ring block. The screen is then locked by bolts set at both ends of the connecting plate to ensure that the entire filtration unit still has a solid structure under rotation and water flow impact. 3. By setting up a collection unit, a rotating material-pushing plate pushes lightweight floating objects such as branches, plastic sheets, and grass leaves floating on the water surface to one side of the counterweight percolation plate, allowing them to smoothly enter through the slotted side and concentrate at the lower point, reducing the obstruction caused by accumulation at the edge, making the collection of debris more thorough. The pushed debris smoothly enters the counterweight percolation plate, while the wastewater carried back returns to the opening through the seepage holes, allowing the wastewater and small particulate impurities accumulated in the plate to seep out. The winch tightens the traction steel wire, driving the counterweight percolation plate to rise and leave the opening, making it convenient to remove and clean the floating debris. Attached Figure Description

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the internal structure of the processing box of the present invention; Figure 2 This is a schematic diagram of the external structure of the present invention; Figure 3 For the present invention Figure 1 A magnified view of a section at point A in the middle; Figure 4 This is a schematic diagram of the three-dimensional mounting structure of the electrode assembly and the cleaning outer ring of the present invention; Figure 5 This is a three-dimensional structural diagram of the outer ring block of the present invention.

[0018] In the diagram: 1. Processing box; 2. Opening; 3. Support; 4. Drainage outlet; 5. Traction wire; 7. Drive frame; 8. Arc plate; 9. Pin; 10. Lower filter screen; 11. Electrode assembly; 12. Rotating disc; 13. Upper filter screen; 14. Cleaning outer ring; 15. Central ring; 16. Stud; 17. Limiting rod; 18. Gear disc; 19. Gear; 20. Cross; 21. Drive rod; 22. Outer ring block; 23. Lifting guide; 24. Counterweight percolation disc; 25. Material feeding plate; 26. Connecting plate; 27. Mounting bolt. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0020] Please see Figures 1-5 As shown, the present invention provides a high-efficiency electrocatalytic oxidation device for wastewater treatment, including a treatment tank 1, an opening 2 on the upper surface of the treatment tank 1, and a sewage outlet 4 facing the opening 2 on one side of the upper end of the treatment tank 1. A collection unit for pushing floating wastewater is installed inside the opening 2, and an upper filter screen 13 is installed below the opening 2. An electrolysis unit is rotatably located below the upper filter screen 13; The electrolysis unit includes a rotating disk 12 rotatably mounted on the inner wall of the treatment tank 1. Several electrode groups 11 for electrolyzing wastewater are rotatably mounted on the surface of the rotating disk 12. A stud 16 is fixed on the middle surface of the rotating disk 12. A cleaning unit that contacts the several electrode groups 11 is threaded onto the outside of the stud 16. The several electrode groups 11 are arranged in a ring, and the center of the arrangement is consistent with the center of the rotating disk 12. The cleaning unit includes a central ring 15 that is threadedly connected to a stud 16. A cleaning outer ring 14 is mounted on the outer wall of the central ring 15 through a limiting plate. The outer surface of the cleaning outer ring 14 is fitted to each rotating electrode assembly 11. A filtration unit is provided on the outer side of the electrode assembly 11 and fixed to the edge surface of the rotating disk 12; A lower filter screen 10 is located directly below the rotating disk 12.

[0021] During operation, wastewater enters the opening 2 from the drain 4 on the upper side of the treatment tank 1. The collection unit moves and collects light floating objects such as branches, weeds, and plastic sheets floating on the water surface, thus separating floating impurities from wastewater. Floating impurities can be automatically moved and discharged before entering the electrolysis zone to avoid the deposition of large debris affecting the normal reaction of the electrodes. The wastewater remaining in the water is filtered by the upper filter screen 13 and then enters the electrolysis zone. The rotation of the rotating disk 12 inside the treatment tank 1 causes several circularly arranged electrode groups 11 to revolve and rotate synchronously with the rotating disk 12. At the same time, each electrode group 11 rotates on its own, creating a water flow environment with enhanced disturbance around the electrode group 11. This improves mass transfer efficiency, reduces electrode polarization, and thus significantly enhances electrocatalytic oxidation efficiency. The enhanced flow field can improve the mass transfer efficiency between wastewater and the electrode surface, reduce electrode polarization, and keep each electrode group 11 in an effective reaction state. Under the dual motion of revolution and rotation, each electrode group 11 carries out electrocatalytic oxidation reaction in the sewage, which breaks down, electrolyzes and oxidizes the large organic molecules, flocculents and some solid debris in the sewage, decomposing them into smaller particles or small molecule pollutants. Simultaneously, the stud 16 drives the rotating disk 12 to rotate, meaning the cleaning unit works synchronously. Under the action of the thread of the stud 16, the central ring 15 drives the cleaning outer ring 14 to make relative sliding contact with the surface of each electrode group 11. Through the limiting action of the limiting plate, continuous scraping and self-cleaning of the electrode surface is achieved. At the same time, the self-rotating electrode group 11 contacts the sliding cleaning outer ring 14, and with the movement of the rotating disk 12, it scrapes and rubs each electrode group 11, enhancing the scraping force. This makes it easier for oil stains, bubbles and fine impurities attached to the surface of each electrode group 11 to fall off under the dual rotation action, thereby keeping each electrode group 11 in an active state for a long time, improving the electrocatalytic treatment efficiency, extending the life and reducing the frequency of manual maintenance. The filtration unit rotates with the rotating disk 12 and forms a filtration structure with the upper filter screen 13. When the sewage flows through this area, it is filtered by different pore sizes and the suspended solids of different particle sizes are intercepted in sequence. This prevents large particles from entering the electrolysis zone and reduces the risk of filter screen clogging, thereby ensuring the continuous and stable operation of the device. The treated water flows from bottom to top through the electrode area and falls into the lower filter screen 10 at the bottom of the rotating disk 12. It undergoes secondary filtration through the lower filter screen 10, forming a continuous circulation treatment in the treatment tank 1.

[0022] See Figure 4 As shown, a toothed disc 18 is fixed inside the processing box 1. A cross 20 is installed at the center of the toothed disc 18. The center of the cross 20 is fixed to the middle surface of the rotating disc 12. Gears 19 that mesh with the inner side of the toothed disc 18 are installed at the four ends of the cross 20. The electrode group 11 corresponding to the gear 19 is rotatably set. A drive rod 21 driven by an external forward and reverse motor is fixed in the middle of the cross 20.

[0023] When the drive rod 21 rotates, it drives the cross 20 and the stud 16 to rotate together. The cross 20 and the rotating disk 12 always move synchronously. At this time, the gear 19 meshes with the gear disk 18 to achieve rotation, which in turn causes several electrode groups 11 to rotate and revolve with the rotating disk 12. When the electrode assembly 11 undergoes double-swirl motion in the wastewater, it will form a local flow field with enhanced disturbance, which will increase the mass transfer rate around each electrode assembly 11. Pollutants in the wastewater will be continuously renewed to the electrode surface, and the pollutants will continue to contact the electrode surface, thereby enhancing the electrocatalytic oxidation effect. After each electrode assembly 11 completes electrolytic chain breaking, oxidation and debris crushing in the wastewater, the treated water will continue to enter the lower filter screen 10 to complete secondary filtration, realizing a continuous and stable wastewater treatment process.

[0024] See Figure 4 As shown, a limiting rod 17 is installed on the front side of the inside of the processing box 1, which is slidably disposed with the limiting plate. The end of the limiting rod 17 is provided with a blocking protrusion, which does not contact the rotating disk 12.

[0025] The limiting rod 17 forms a guiding support for the limiting plate under sliding engagement, and the blocking protrusion acts as a mechanical limiting joint to limit the movement range of the limiting plate and prevent the limiting plate and the cleaning outer ring 14 from excessively shifting during rotational disturbance.

[0026] See Figure 5 As shown, the filtration unit includes two outer ring blocks 22, and a plurality of connecting plates 26 for supporting the sieve are installed between the two outer ring blocks 22. The inner wall of the connecting plate 26 is arc-shaped and its inner arc surface is flush with the inner arc surface of the outer ring block 22. The inner side of the outer ring block 22 is provided with an installation ring cavity into which the edge of the screen enters, and both ends of the connecting plate 26 are provided with installation bolts 27 for fixing the screen. The screening screen has four screening zones in each direction, and the diameter of the screen holes in each screening zone decreases sequentially. The outer side of the sieve is flush with the outer wall of the two outer ring blocks 22, and the outer wall of the sieve is attached to the upper filter screen 13 and the lower filter screen 10 respectively, so that the entire filtration unit forms a continuous annular bearing surface, ensuring that the sieve maintains a stable arc structure after installation.

[0027] The basic frame of the filtration unit is formed by two outer ring blocks 22. The screen is formed into a ring and installed between the two outer ring blocks 22. The edge of the screen is embedded in the mounting ring cavity inside the outer ring block 22. The screen is then locked by bolts set at both ends of the connecting plate 26 to ensure that the entire filtration unit still has a solid structure under rotation and water flow impact. Initially, the uppermost screening section of the screen mesh is aligned with the upper filter screen 13, allowing wastewater from the upper filter screen 13 to seamlessly enter the screening section of the screen mesh. After flowing down from the upper filter screen 13, the wastewater directly enters the corresponding screening section of the screen mesh. Since the screen hole diameters of the four screening sections of the screen mesh decrease sequentially, the suspended particles in the wastewater undergo a step-by-step screening process from large aperture to small aperture when flowing through the screen mesh. As the rotating disc 12 rotates, the next directional screening section is aligned with the upper filter screen 13 again, and the entire filter system continues to complete a new round of multi-stage screening, avoiding dead corners or local blockages between different directional screening sections of sewage.

[0028] See Figure 1 As shown, a drive frame 7 is horizontally slidably installed below the opening 2. An arc plate 8 is fixed to the end of the drive frame 7. A pin 9 for clearing the sieve holes of the sieve section is fixed to the inner wall of the arc plate 8.

[0029] After prolonged operation, some screening sections may experience localized blockages due to the large amount of suspended solids trapped in the screen. The drive frame 7 moves toward the screen, causing the pins 9 on the inner wall of the arc plate 8 to extend into the screen hole of the screening section, intermittently pressing and clearing the screen hole. When the pins 9 contact the screen hole, they generate a slight pushing force on the blocked impurities, causing the fine solid particles, hair or flocculent matter attached to the hole wall to be pushed out of the screen hole and fall off with the water flow, thereby restoring the permeability of the screening section.

[0030] See Figure 3 As shown, the collection unit includes a material-pushing plate 25 that is rotatably disposed in the opening 2, and a counterweight percolation plate 24 that moves vertically is provided on one side of the material-pushing plate 25. The bottom surface of the inner cavity of the counterweight percolation plate 24 is inclined downward toward the side away from the material feeding plate 25; A support 3 is provided above the opening 2. A traction steel wire 5 driven by a winch is installed on the lower surface of the top plate inside the support 3. The end of the traction steel wire 5 is fixed to the upper edge of the counterweight percolation plate 24. A groove is cut on one side of the counterweight percolation plate 24 and percolation holes are provided on its bottom surface. A lifting guide 23 that slides along the inner wall of the support 3 is fixed to the upper edge of the counterweight percolation plate 24.

[0031] The rotating feed plate 25 pushes lightweight floating objects such as branches, plastic sheets, and grass leaves floating on the water surface to one side of the counterweight percolation plate 24, allowing them to smoothly enter through the slotted side and concentrate at the lower point, reducing the obstruction caused by accumulation at the edge, making the collection of debris more thorough. The pushed debris smoothly enters the counterweight percolation plate 24, while the wastewater carried back returns to the opening 2 through the seepage holes, allowing the wastewater and small particle impurities accumulated in the plate to seep out, leaving only the larger floating debris. Then, the winch tightens the traction steel wire 5, causing the counterweight percolation plate 24 to rise and leave the opening 2, making it easier to remove and clean the floating debris.

[0032] In use, the rotating disk 12 inside the treatment tank 1 drives several circularly arranged electrode groups 11 to revolve and rotate synchronously with the rotating disk 12. At the same time, each electrode group 11 rotates on its own, creating a water flow environment with enhanced disturbance around the electrode group 11. The enhanced flow field can improve the mass transfer efficiency between wastewater and the electrode surface, reduce electrode polarization, and keep each electrode group 11 in an effective reaction state. In conjunction with the contact between the rotating electrode group 11 and the sliding cleaning outer ring 14, the rotating disk 12 scrapes and rubs each electrode group 11, enhancing the scraping force. This makes it easier for oil stains, bubbles, and fine impurities attached to the surface of each electrode group 11 to fall off under the dual rotation action, thereby keeping each electrode group 11 in an active state for a long time and improving the electrocatalytic treatment efficiency. The basic frame of the filtration unit is formed by two outer ring blocks 22. The screen is formed into a ring and installed between the two outer ring blocks 22. The edge of the screen is embedded in the mounting ring cavity inside the outer ring block 22. The screen is then locked by bolts set at both ends of the connecting plate 26 to ensure that the entire filtration unit still has a solid structure under rotation and water flow impact. By setting up a collection unit, the rotating material-pushing plate 25 pushes lightweight floating objects such as branches, plastic sheets, and grass leaves floating on the water surface to one side of the counterweight percolation plate 24, allowing them to smoothly enter through the slotted side and concentrate at the lower point, reducing the obstruction caused by accumulation at the edge, making the collection of debris more thorough. The pushed debris smoothly enters the counterweight percolation plate 24, while the wastewater carried back returns to the opening 2 through the seepage holes, allowing the wastewater and small particulate impurities accumulated in the plate to seep out. The winch tightens the traction steel wire 5, driving the counterweight percolation plate 24 to rise and leave the opening 2, making it convenient to remove and clean the floating debris.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A high-efficiency electrocatalytic oxidation device for wastewater treatment, comprising a treatment tank (1), characterized in that: The upper surface of the treatment box (1) is provided with an opening (2), and a sewage outlet (4) is provided on one side of the upper end of the treatment box (1) facing the opening (2). A collection unit for pushing floating sewage material is installed inside the opening (2), and an upper filter screen (13) is installed below the opening (2). An electrolysis unit is rotatably provided below the upper filter screen (13); The electrolysis unit includes a rotating disk (12) rotatably mounted on the inner wall of the treatment tank (1). Several electrode groups (11) for electrolyzing wastewater are rotatably mounted on the surface of the rotating disk (12). A stud (16) is fixed on the middle surface of the rotating disk (12). A cleaning unit that contacts several electrode groups (11) is threaded onto the outside of the stud (16). Several electrode groups (11) are arranged in a ring, and the center of the arrangement is consistent with the center of the rotating disk (12). The cleaning unit includes a central ring (15) threadedly connected to a stud (16), and a cleaning outer ring (14) is mounted on the outer wall of the central ring (15) by a limiting plate. The outer surface of the cleaning outer ring (14) is fitted to each rotating electrode assembly (11). The outer side of the electrode group (11) is provided with a filtration unit that is fixed to the edge surface of the rotating disk (12); A lower filter screen (10) is provided directly below the rotating disk (12).

2. The high-efficiency electrocatalytic oxidation device for wastewater treatment according to claim 1, characterized in that, The processing box (1) has a toothed disc (18) fixed inside. A cross (20) is installed at the center of the toothed disc (18). The center of the cross (20) is fixed to the middle surface of the rotating disc (12). Gears (19) that mesh with the inner side of the toothed disc (18) are installed at the four ends of the cross (20). The electrode group (11) corresponding to the gear (19) is rotatably set. The cross (20) has a drive rod (21) fixed in the middle, driven by an external forward and reverse motor.

3. The high-efficiency electrocatalytic oxidation device for wastewater treatment according to claim 1, characterized in that, The processing box (1) is equipped with a limiting rod (17) that slides with the limiting plate on the front side of the interior. The end of the limiting rod (17) is provided with a blocking protrusion that does not contact the rotating disk (12).

4. The high-efficiency electrocatalytic oxidation device for wastewater treatment according to claim 1, characterized in that, The filtration unit includes two outer ring blocks (22), and a plurality of connecting plates (26) for supporting the sieve are installed between the two outer ring blocks (22). The inner wall of the connecting plate (26) is arc-shaped and its inner arc surface is flush with the inner arc surface of the outer ring block (22). The inner side of the outer ring block (22) is provided with an installation ring cavity into which the edge of the sieve screen enters, and both ends of the connecting plate (26) are provided with installation bolts (27) for fixing the sieve screen.

5. The high-efficiency electrocatalytic oxidation device for wastewater treatment according to claim 4, characterized in that, The screening screen has four screening zones in each direction, and the diameter of the screen holes in each screening zone decreases sequentially. The outer side of the sieve is flush with the outer wall of the two outer ring blocks (22), and the outer wall of the sieve is attached to the upper filter screen (13) and the lower filter screen (10) respectively.

6. The high-efficiency electrocatalytic oxidation device for wastewater treatment according to claim 1, characterized in that, A drive frame (7) is horizontally slidably installed below the opening (2). An arc plate (8) is fixed at the end of the drive frame (7). A pin (9) for clearing the sieve holes of the sieve section is fixed on the inner wall of the arc plate (8).

7. The high-efficiency electrocatalytic oxidation device for wastewater treatment according to claim 1, characterized in that, The collection unit includes a material-dispensing plate (25) that is rotatably disposed in the opening (2), and a counterweight percolation plate (24) that moves vertically is provided on one side of the material-dispensing plate (25). The bottom surface of the inner cavity of the counterweight percolation plate (24) is inclined downward toward the side away from the feed plate (25).

8. The high-efficiency electrocatalytic oxidation device for wastewater treatment according to claim 1, characterized in that, A bracket (3) is provided above the opening (2), and a traction steel wire (5) driven by a winch is installed on the lower surface of the inner top plate of the bracket (3). The end of the traction steel wire (5) is fixed to the upper edge of the counterweight permeation disc (24). The counterweight percolation plate (24) has a groove on one side and percolation holes on its bottom surface, and the upper edge of the counterweight percolation plate (24) is fixed with a lifting guide (23) that slides along the inner wall of the support (3).

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