An electro-Fenton reaction-based catalytic oxidation sewage treatment device

Abstract

The present invention relates to the field of sewage treatment. Specifically, it relates to an electro-Fenton reaction catalytic oxidation sewage treatment device, which includes a treatment tank and an anode ring arranged at the top of the treatment tank. A plurality of arc-shaped cathode plates are circumferentially and equidistantly arranged at the bottom of the cathode ring. An anode column is coaxially arranged at the center of the cathode ring. A circular groove is arranged at the upper end of the anode column, and a plurality of air supply holes are arranged on the inner wall of the circular groove. A cleaning mechanism for cleaning the arc-shaped cathode plates and the anode column is arranged on the anode column. The cleaning mechanism includes a horizontal ring slidably arranged on the anode column and capable of reciprocating along its axis. A plurality of arc-shaped through grooves for the arc-shaped cathode plates to pass through are arranged on the horizontal ring. A mixing mechanism for mixing the electrolyzed substances on the arc-shaped cathode plates and the anode column is also arranged on the horizontal ring. The present invention can remove the adhered impurities, accelerate the reaction speed between the electrolyzed substances, and improve the sewage treatment efficiency.

Description

Technical Field

[0001] The present invention relates to the field of sewage treatment, and more particularly to an electro-Fenton reaction catalytic oxidation sewage treatment device. Background Art

[0002] Based on the Fenton process, the electro-Fenton process introduces a power supply and uses Fe2* and H,0, generated by electrochemistry as a continuous source of Fenton reagents. After they react, highly reactive hydroxyl radicals are generated, which directly oxidize non-biodegradable organic matter into carbon dioxide and water, so as to degrade organic matter, purify wastewater, and achieve the purpose of deep treatment and up-to-standard discharge.

[0003] Chinese Patent: CN221955876U discloses a device for catalytic oxidation of sewage based on electro-Fenton reaction, including an insulating barrel. Inside the insulating barrel, a stainless steel container is fixedly installed. Inside the stainless steel container, an insulating column is fixedly installed. On the top surface of the insulating column, a lead dioxide column is fixedly installed. On the outer side surface of the stainless steel container, a first water inlet pipe and a water outlet pipe are fixedly connected. On the left side surface of the first water inlet pipe, a water pump is fixedly connected. On the left side surface of the water pump, a second water inlet pipe is fixedly installed. On the top surface of the insulating barrel, a driving motor and an air pump are fixedly installed. On the output shaft of the driving motor, a rotating shaft is fixedly installed.

[0004] In this patent, under long-term electrolysis, impurities in the sewage will adhere to the barrel wall and the lead dioxide column, resulting in a relatively slow overflow of electrolytes. Moreover, the distance between the anode and the cathode is relatively far, and they cannot react with each other in time, resulting in poor electrolysis effect. Summary of the Invention

[0005] The main object of the present invention is to provide an electro-Fenton reaction catalytic oxidation sewage treatment device. Through the cooperation of a horizontal ring and a rotating ring, it can remove adhered impurities while accelerating the reaction rate between electrolytes and improving the sewage treatment efficiency.

[0006] To achieve the above object, the present invention provides an electro-Fenton reaction-based catalytic oxidation sewage treatment device, which includes a treatment tank, a cathode ring, an anode column, a cleaning mechanism and a mixing mechanism; a liquid inlet is provided at the top edge of the treatment tank, and a liquid outlet is provided on the outer wall of the top of the treatment tank; a circular perforation is provided at the center of the top of the treatment tank, the cathode ring is arranged in the circular perforation, and a plurality of arc-shaped cathode plates extending vertically downward are circumferentially and equidistantly arranged at the bottom of the cathode ring. An insulating ring is provided at the center of the top of the cathode ring. The anode column is arranged vertically inside the insulating ring. A circular groove is provided at the upper end of the anode column, and a plurality of air supply holes are circumferentially arranged along the axial direction on the inner wall of the circular groove; the cleaning mechanism is arranged on the anode column and is used for cleaning the arc-shaped cathode plates and the anode column; the cleaning mechanism includes a horizontal ring slidably arranged on the anode column and capable of reciprocating along its axis. A plurality of arc-shaped through grooves for allowing the arc-shaped cathode plates to pass through are circumferentially arranged on the horizontal ring; the mixing mechanism is arranged on the horizontal ring and can mix the electrolytes electrolyzed on the arc-shaped cathode plates and the anode column when the horizontal ring moves; the mixing mechanism includes two rotating rings arranged at the corresponding ends of the horizontal ring and capable of rotating as the horizontal ring moves. A first annular inclined portion is arranged on the inner wall of each rotating ring, and a second annular inclined portion corresponding to the first annular inclined portion is arranged at the center of both ends of the horizontal ring. The cross section of the first annular inclined portion and the corresponding second annular inclined portion is arranged in a V shape. A plurality of rectangular through grooves are circumferentially arranged on the horizontal ring, and a plurality of pushing plates are circumferentially arranged on the inner wall of each rotating ring.

[0007] Preferably, a plurality of disturbing plates are circumferentially arranged on the outer wall of each rotating ring. The length direction of the disturbing plates is tangent to the outer wall of the corresponding arc-shaped cathode plate. A strip-shaped guiding groove is arranged on one side of each disturbing plate close to the outer wall of the corresponding rotating ring. A plurality of communication ports communicating with the strip-shaped guiding grooves are circumferentially arranged on the inner wall of each rotating ring, and the communication ports are located between the corresponding pushing plates and the disturbing plates.

[0008] Preferably, two threaded rods capable of rotating in a mirror image manner are arranged at the top of the treatment tank. Two threaded holes cooperating with the threaded rods are circumferentially arranged on each horizontal ring. The threaded rods are threadedly connected to the corresponding threaded holes. Two strip-shaped grooves are arranged in a mirror image manner on the outer wall of each threaded rod. A plurality of gear teeth are circumferentially arranged on the inner wall of each rotating ring. Two outer gear rings capable of rotating are arranged at both ends of the horizontal ring. The outer gear rings are sleeved on the corresponding threaded rods and mesh with the gear teeth on the inner wall of the corresponding rotating ring. Two clamping blocks are arranged in a mirror image manner on the inner wall of each outer gear ring, and the clamping blocks are slidably arranged in the corresponding strip-shaped grooves.

[0009] Preferably, a driving mechanism for driving the two threaded rods to rotate synchronously is further arranged at the top of the treatment tank.

[0010] Preferably, the driving mechanism includes an internal gear ring and a C-shaped plate; the internal gear ring is rotatably arranged at the center of the top of the treatment tank, the upper end of each threaded rod extends out of the treatment tank and is provided with a synchronous gear, and both synchronous gear are meshed with the internal gear ring. The C-shaped plate is arranged at the center of the top of the treatment tank, and a driving motor for driving any one of the synchronous gears to rotate is arranged on the C-shaped plate.

[0011] Preferably, an air pump for conveying gas into the circular groove is further arranged on the C-shaped plate.

[0012] Preferably, a cleaning port is arranged on the outer wall of the bottom of the treatment tank.

[0013] The beneficial effects of this application compared with the prior art are as follows:

[0014] 1. Through the cooperation of the horizontal ring and the threaded rod in this application, as the threaded rod rotates, the horizontal ring can move back and forth along its axis, so as to clean the impurities adhered to the arc-shaped cathode plate and the anode column, avoid the accumulation of impurities on their surfaces, enable the electrolytes to contact each other, and ensure the synthesis efficiency of the electrolytes.

[0015] 2. Through the cooperation of the first annular inclined part and the second annular inclined part in this application, during the movement of the horizontal ring, the electrolytes on the anode column can move along the second annular inclined part onto the horizontal ring, and the electrolytes on each arc-shaped cathode plate can move along the first annular inclined part onto the horizontal ring, so as to produce the composite faster and improve the sewage treatment efficiency.

[0016] 3. Through the cooperation of the rotating ring and the external gear ring in this application, as the two threaded rods rotate, the horizontal ring moves back and forth along its axis. The external gear rings arranged at both ends of the horizontal ring can rotate as the threaded rod rotates, so that the rotating rings at both ends of the horizontal ring can rotate synchronously. The disturbing plates arranged on the outer wall of the rotating ring can not only disturb the sewage in the treatment tank, but also the sewage can enter the inside of the rotating ring through the circulation port along the strip-shaped guiding grooves on the disturbing plates, so as to impact the composite electrolyzed by the anode column and the arc-shaped cathode plate, make the composite disperse more evenly into the inside of the treatment tank, and thus improve the sewage treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention, making other features, objects, and advantages of the present invention more obvious. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 is a perspective view of the present invention;

[0019] Figure 2 is Figure 1Partial enlarged view at position A in

[0020] Figure 3 is the front view of the present invention;

[0021] Figure 4 is Figure 3 a plane cross-sectional view along the direction of B - B;

[0022] Figure 5 is a partial three-dimensional Figure 1 ;

[0023] Figure 6 is a partial three-dimensional Figure 2 ;

[0024] Figure 7 is Figure 6 the partial enlarged view at position C in

[0025] Figure 8 is the three-dimensional view of the horizontal ring in the present invention.

[0026] The reference numerals in the above figures are as follows:

[0027] 1 - treatment tank; 11 - liquid inlet; 12 - liquid outlet; 13 - circular perforation; 14 - threaded rod; 141 - strip-shaped groove; 142 - synchronous gear; 15 - cleaning port;

[0028] 2 - cathode ring; 21 - arc-shaped cathode plate; 22 - insulating ring;

[0029] 3 - anode column; 31 - circular groove; 32 - air supply hole;

[0030] 4 - cleaning mechanism; 41 - horizontal ring; 42 - arc-shaped through groove; 43 - second annular inclined part; 44 - rectangular through slot; 45 - threaded hole; 46 - external tooth ring; 461 - clamping block;

[0031] 5 - mixing mechanism; 51 - rotating ring; 52 - first annular inclined part; 53 - pushing plate; 54 - disturbing plate; 541 - strip-shaped guiding groove; 55 - circulation port; 56 - teeth;

[0032] 6 - driving mechanism; 61 - internal tooth ring; 62 - C-shaped plate; 621 - driving motor; 622 - air pump. Detailed implementation mode

[0033] To enable those skilled in the art to better understand the solution of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0034] See Figures 1 to 8 As shown, a sewage treatment device based on electro-Fenton reaction catalytic oxidation includes a treatment tank 1, a cathode ring 2, an anode column 3, a cleaning mechanism 4, and a mixing mechanism 5; a liquid inlet 11 is provided at the top edge of the treatment tank 1, and a liquid outlet 12 is provided on the outer wall of the top of the treatment tank 1; a circular perforation 13 is provided at the center of the top of the treatment tank 1, the cathode ring 2 is arranged in the circular perforation 13, and a plurality of arc-shaped cathode plates 21 extending vertically downward are circumferentially and equidistantly arranged at the bottom of the cathode ring 2. An insulating ring 22 is provided at the center of the top of the cathode ring 2. The anode column 3 is arranged vertically inside the insulating ring 22. A circular groove 31 is provided at the upper end of the anode column 3, and a plurality of air supply holes 32 are circumferentially arranged along the axial direction on the inner wall of the circular groove 31; the cleaning mechanism 4 is arranged on the anode column 3 and is used to clean the arc-shaped cathode plates 21 and the anode column 3; the cleaning mechanism 4 includes a horizontal ring 41 slidably arranged on the anode column 3 and capable of reciprocating along its axis. A plurality of arc-shaped through grooves 42 for the arc-shaped cathode plates 21 to pass through are circumferentially arranged on the horizontal ring 41; the mixing mechanism 5 is arranged on the horizontal ring 41 and can mix the electrolytes electrolyzed on the arc-shaped cathode plates 21 and the anode column 3 when the horizontal ring 41 moves; the mixing mechanism 5 includes two rotating rings 51 arranged at the corresponding ends of the horizontal ring 41 and capable of rotating as the horizontal ring 41 moves. A first annular inclined portion 52 is provided on the inner wall of each rotating ring 51, and a second annular inclined portion 43 corresponding to the first annular inclined portion 52 is provided at the center of both ends of the horizontal ring 41. The cross-section of the first annular inclined portion 52 and the corresponding second annular inclined portion 43 is arranged in a V shape. A plurality of rectangular through grooves 44 are circumferentially arranged on the horizontal ring 41, and a plurality of push plates 53 are circumferentially arranged on the inner wall of each rotating ring 51.

[0035] Sewage to be treated is conveyed into the interior of the treatment tank 1 through the liquid inlet 11, and the cathode ring 2 and the anode column 3 are electrified. The anode column 3 is located at the center of the cathode ring 2. Subsequently, gas is conveyed into the circular groove 31 through the opening at the upper end of the anode column 3, and the gas can overflow from the circular groove 31 along a plurality of air holes 32. The air inlet holes correspond to the corresponding arc-shaped cathode plates 21 one by one, so that a plurality of arc-shaped cathode plates 21 can contact the gas, thereby performing corresponding electrolysis. Moreover, the concave surfaces of the arc-shaped cathode plates 21 all face the outer wall direction of the anode column 3, so that while the gas can be blocked, the gas can be dispersed to both sides, enabling the gas to contact and react with the two adjacent arc-shaped cathode plates 21, thereby slowing down the gas flow rate and improving the electrolysis efficiency of the arc-shaped cathode plates 21; during this process, electrolysis also occurs on the anode column 3. After the two act on each other, highly active hydroxyl radicals are generated, which have strong flocculation, complexation, and adsorption effects, thereby degrading the sewage accordingly.

[0036] However, during the electrolysis process, since impurities in the sewage may adhere to the arc-shaped cathode plates 21 and the anode column 3, this will cause the electrolyzed products to be unable to be released, thus affecting the sewage treatment efficiency; based on this situation, a horizontal ring 41 is slidably arranged on the anode column 3. During the electro-Fenton reaction process, the horizontal ring 41 can move slowly back and forth along the axis of the anode column 3, enabling the horizontal ring 41 to contact the anode column 3 and a plurality of arc-shaped cathode plates 21, thereby reciprocally cleaning the impurities adhering to them, thus ensuring the electrolysis effect.

[0037] Secondly, due to the extremely large volume inside the treatment tank 1, during the electrolysis process, the electrolytes on the arc-shaped cathode plate 21 and the anode column 3 are relatively dispersed, resulting in an overly long reaction time between the two. To enable better contact between the electrolytes on the arc-shaped cathode plate 21 and the anode column 3, rotating rings 51 capable of rotation are provided at both ends of the horizontal ring 41. The rotating rings 51 can perform corresponding forward and reverse rotations as the horizontal ring 41 moves back and forth. Since the cross-sections of the first annular inclined portion 52 and the corresponding second annular inclined portion 43 are arranged in a V-shape, the electrolytes on the anode column 3 can move along the second annular inclined portion 43 onto the horizontal ring 41, and the electrolytes on each arc-shaped cathode plate 21 can move along the first annular inclined portion onto the horizontal ring 41. Moreover, a plurality of pushing plates 53 are circumferentially arranged on the inner wall of each rotating ring 51. One side of each pushing plate 53 along the length direction is tangent to the outer wall of the corresponding arc-shaped cathode plate 21. When the horizontal ring 41 moves upward, the rotating ring 51 at the upper end rotates. During the rotation of the rotating ring 51, the pushing plate 53 can gather the electrolytes on the arc-shaped cathode plate 21, making the electrolytes on the arc-shaped cathode plate 21 closer to the electrolytes on the anode column 3, thereby improving the reaction effect. Secondly, by circumferentially arranging a plurality of rectangular through grooves 44 on the horizontal ring 41, the generated products can move through the plurality of rectangular through grooves 44 to the lower end of the horizontal ring 41. At this time, the rotating ring 51 at the lower end also rotates, and the pushing plate 53 of the lower rotating ring 51 can disrupt the generated products, enabling them to be evenly dispersed inside the treatment tank 1, thereby improving the sewage treatment effect. Similarly, when the horizontal ring 41 moves downward, it can also perform a concentrated reaction on the electrolytes in its moving direction. After the treatment is completed, the sewage is discharged through the liquid outlet 12, thus realizing the continuous treatment of the sewage.

[0038] See Figures 5 to 8 As shown, a plurality of disrupting plates 54 are circumferentially arranged on the outer wall of each rotating ring 51. The length direction of the disrupting plates 54 is tangent to the outer wall of the corresponding arc-shaped cathode plate 21. A strip-shaped guiding groove 541 is provided on one side of each disrupting plate 54 close to the outer wall of the corresponding rotating ring 51. A plurality of through ports 55 communicating with the strip-shaped guiding grooves 541 are circumferentially arranged on the inner wall of each rotating ring 51. The through ports 55 are located between the corresponding pushing plates 53 and the disrupting plates 54.

[0039] In order to better treat sewage, through the disturbing plate 54 provided on the outer wall of the rotating ring 51, when the horizontal ring 41 moves, the rotating ring 51 at the front end of the moving direction rotates. When the rotating ring 51 rotates, the disturbing plate 54 can stir the sewage inside the treatment tank 1, so that the electrolytic reactants of the shaped cathode plate and the anode column 3 can better treat the sewage. At this time, the rotating ring 51 at the rear end rotates, so as to guide the sewage, so that the sewage can enter the interior of the rotating ring 51 at the rear end along the inclined disturbing plate 54 through the strip-shaped guiding groove 541 and the circulation port 55, thereby impacting the composite electrolyzed by the anode column 3 and the arc-shaped cathode plate 21, so that the composite can be more evenly dispersed into the treatment tank 1, thereby improving the sewage treatment efficiency. Secondly, the corresponding disturbing plates 54 on the two rotating rings 51 are perpendicular to each other. During the synchronous rotation of the two rotating rings 51, the disturbing plate 54 can better stir the sewage.

[0040] See Figures 4 to 7 As shown, two threaded rods 14 that can rotate are mirror-image arranged at the top of the treatment tank 1. Two threaded holes 45 that cooperate with the threaded rods 14 are circumferentially arranged on each horizontal ring 41. The threaded rods 14 are threadedly connected to the corresponding threaded holes 45. Two strip-shaped grooves 141 are mirror-image arranged on the outer wall of each threaded rod 14. A plurality of teeth 56 are circumferentially arranged on the inner wall of each rotating ring 51. Two outer toothed rings 46 that can rotate are arranged at both ends of the horizontal ring 41. The outer toothed rings 46 are sleeved on the corresponding threaded rods 14 and mesh with the teeth 56 on the inner wall of the corresponding rotating ring 51. Two blocks 461 are mirror-image arranged on the inner wall of each outer toothed ring 46. The blocks 461 can slide in the corresponding strip-shaped grooves 141.

[0041] The threaded rod 14 is located between the inner wall of the corresponding rotating ring 51 and the outer wall of the cathode ring 2. As the two threaded rods 14 rotate, the threaded rods 14 mesh with the threaded holes 45 on the horizontal ring 41, so that the horizontal ring 41 can move back and forth along its axis. During this process, by rotating the two outer toothed rings 46 arranged at both ends of the horizontal ring 41, with the cooperation of the blocks 461, it can rotate correspondingly as the threaded rod 14 rotates. The outer toothed rings 46 mesh with the teeth 56 on the inner wall of the corresponding rotating ring 51, so that the rotating rings 51 at both ends of the horizontal ring 41 can rotate synchronously. While stirring the sewage, the sewage can impact the composite electrolyzed by the anode column 3 and the arc-shaped cathode plate 21 along the strip-shaped guiding groove 541 and the circulation port 55, so that the composite can be mixed with the sewage faster.

[0042] See Figure 2 、 Figures 5 to 7As shown in the figure, a driving mechanism 6 for driving two threaded rods 14 to rotate synchronously is further provided at the top of the treatment tank 1; the driving mechanism 6 includes an internal gear ring 61 and a C-shaped plate 62; the internal gear ring 61 is rotatably arranged at the center of the top of the treatment tank 1, the upper end of each threaded rod 14 extends out of the treatment tank 1 and is provided with a synchronous gear 142, and the two synchronous gears 142 are both meshed with the internal gear ring 61. The C-shaped plate 62 is arranged at the center of the top of the treatment tank 1, and a driving motor 621 for driving any one of the synchronous gears 142 to rotate is arranged on the C-shaped plate 62.

[0043] By driving the driving motor 621 to drive any one of the synchronous gears 142 to rotate, as the corresponding synchronous gear 142 rotates, the synchronous gear 142 is transmitted through the internal gear ring 61, so that the two threaded rods 14 can rotate synchronously. While ensuring the stability of the movement of the horizontal ring 41, the two rotating rings 51 can also rotate synchronously, so as to stir the sewage.

[0044] See Figure 2 As shown in the figure, an air pump 622 for conveying gas into the circular groove 31 is further arranged on the C-shaped plate 62.

[0045] In order to ensure the continuous conveyance of gas, the air pump 622 continuously conveys gas into the circular groove 31 of the anode column 3, so as to ensure that the arc-shaped cathode plate 21 has enough oxygen for reaction, and the continuously conveyed gas can push the sewage entering the circular groove 31, so as to avoid sewage remaining inside the circular groove 31.

[0046] See Figure 1 As shown in the figure, a cleaning port 15 is arranged on the outer wall of the bottom of the treatment tank 1.

[0047] By providing the cleaning port 15, when there is too much accumulation inside the treatment tank 1, the staff can conveniently clean the inside of the treatment tank 1 through the cleaning port 15, so as to ensure the sewage treatment effect.

[0048] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. An electro-Fenton reaction-based catalytic oxidation sewage treatment device, characterized in that It includes a treatment tank, a cathode ring, an anode column, a cleaning mechanism and a mixing mechanism; A liquid inlet is arranged at the top edge of the treatment tank, and a liquid outlet is arranged on the outer wall of the top of the treatment tank; A circular perforation is arranged at the center of the top of the treatment tank. The cathode ring is arranged in the circular perforation. A plurality of arc-shaped cathode plates extending vertically downward are circumferentially and equidistantly arranged at the bottom of the cathode ring. An insulating ring is arranged at the center of the top of the cathode ring. The anode column is arranged vertically inside the insulating ring. A circular groove is arranged at the upper end of the anode column. A plurality of air supply holes are circumferentially arranged along the axial direction on the inner wall of the circular groove; The cleaning mechanism is arranged on the anode column and is used for cleaning the arc-shaped cathode plates and the anode column; the cleaning mechanism includes a horizontal ring slidably arranged on the anode column and capable of moving back and forth along its axis. A plurality of arc-shaped through grooves for allowing the arc-shaped cathode plates to pass through are circumferentially arranged on the horizontal ring; The mixing mechanism is arranged on the horizontal ring and can mix the electrolytes electrolyzed on the arc-shaped cathode plates and the anode column when the horizontal ring moves; the mixing mechanism includes two rotating rings arranged at the corresponding ends of the horizontal ring and capable of rotating as the horizontal ring moves. A first annular inclined part is arranged on the inner wall of each rotating ring. Second annular inclined parts corresponding to the first annular inclined parts are arranged at the centers of both ends of the horizontal ring. The cross section of the first annular inclined part and the corresponding second annular inclined part is arranged in a V shape. A plurality of rectangular through grooves are circumferentially arranged on the horizontal ring. A plurality of pushing plates are circumferentially arranged on the inner wall of each rotating ring.

2. The sewage treatment device based on electro-Fenton reaction catalytic oxidation according to claim 1, characterized in that, A plurality of disturbing plates are circumferentially arranged on the outer wall of each rotating ring. The length direction of the disturbing plates is tangent to the outer wall of the corresponding arc-shaped cathode plate. A strip-shaped guiding groove is arranged on one side of each disturbing plate close to the outer wall of the corresponding rotating ring. A plurality of flow ports communicating with the strip-shaped guiding grooves are circumferentially arranged on the inner wall of each rotating ring. The flow ports are located between the corresponding pushing plates and the disturbing plates.

3. A sewage treatment device based on electro-Fenton reaction catalytic oxidation according to claim 1, characterized in that, Two threaded rods capable of rotating in a mirror image are arranged at the top of the treatment tank. Two threaded holes cooperating with the threaded rods are circumferentially arranged on each horizontal ring. The threaded rods are threadedly connected to the corresponding threaded holes. Two strip-shaped grooves are arranged on the outer wall of each threaded rod in a mirror image. A plurality of gear teeth are circumferentially arranged on the inner wall of each rotating ring. Two outer gear rings capable of rotating are arranged at both ends of the horizontal ring. The outer gear rings are sleeved on the corresponding threaded rods and meshed with the gear teeth on the inner wall of the corresponding rotating ring. Two clamping blocks are arranged on the inner wall of each outer gear ring in a mirror image. The clamping blocks are slidably arranged in the corresponding strip-shaped grooves.

4. A sewage treatment device based on electro-Fenton reaction catalytic oxidation according to claim 3, characterized in that, A driving mechanism for driving the two threaded rods to rotate synchronously is also arranged at the top of the treatment tank.

5. The sewage treatment device based on electro-Fenton reaction catalytic oxidation according to claim 4, wherein The driving mechanism includes an internal gear ring and a C-shaped plate; The internal gear ring is rotatably arranged at the center of the top of the treatment tank. The upper end of each threaded rod extends out of the treatment tank and is provided with a synchronous gear. The two synchronous gears are both meshed with the internal gear ring. The C-shaped plate is arranged at the center of the top of the treatment tank. A driving motor for driving any one of the synchronous gears to rotate is arranged on the C-shaped plate.

6. The catalytic oxidation sewage treatment device based on the electro-Fenton reaction according to claim 5, characterized in that, An air pump for conveying gas into the circular groove is also arranged on the C-shaped plate.

7. A sewage treatment device based on electro-Fenton reaction catalytic oxidation according to claim 1, characterized in that A cleaning port is arranged on the outer wall of the bottom of the treatment tank.

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