An electrochemical oxidation-reduction reactor for wastewater treatment

Abstract

This invention discloses an electrochemical oxidation-reduction reactor for wastewater treatment, relating to the field of wastewater technology. It includes a reaction tank and cathode plates installed inside the tank, with at least two sets of cathode plates disposed within the tank. A scraper mechanism is also provided, comprising a rotating shaft, a scraper assembly, and a drive component. The scraper assembly includes a scraper body and a connecting component. The scraper body is movably mounted on the rotating shaft via the connecting component. The scraping surface of the scraper body forms an adjustable gap with the surface of the cathode plate. This invention addresses the problem in existing technologies where the accumulation of large amounts of fouling on the cathode plate during wastewater treatment using electrochemical oxidation-reduction technology affects wastewater treatment efficiency. This invention offers advantages such as automatically removing fouling from the cathode plate, preventing large amounts of fouling from affecting the efficiency of the electrolytic reaction, and dynamically adjusting the gap between the scraper and the cathode plate according to the nature of the fouling, reducing wear and increasing service life.

Description

Technical Field

[0001] This invention relates to the field of wastewater technology, and in particular to an electrochemical oxidation-reduction reactor for wastewater treatment. Background Technology

[0002] In the field of wastewater treatment, electrochemical oxidation-reduction technology is a highly efficient and environmentally friendly wastewater treatment method. Its core principle is to drive the oxidation-reduction reaction on the electrode surface through an electric field, converting organic pollutants into harmless substances and recovering valuable metals.

[0003] In existing technologies, when treating wastewater using electrochemical oxidation-reduction technology, a large amount of fouling adheres to the cathode plate. The accumulation of fouling on the cathode plate affects the efficiency of the electrolysis reaction because the current density distribution becomes uneven, leading to overload in some areas and generating side reactions such as hydrogen evolution corrosion. This increases energy consumption, reduces current efficiency, and may also shorten electrode life. In addition, fouling may also block the flow of electrolyte, affecting mass transfer efficiency and resulting in a decrease in treatment effect.

[0004] To address the above technical problems, this invention discloses an electrochemical oxidation-reduction reactor for wastewater treatment. This invention has advantages such as automatically removing dirt from the cathode plate and avoiding the impact of large amounts of dirt on the efficiency of the electrolysis reaction. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an electrochemical oxidation-reduction reactor for wastewater treatment. This invention addresses the technical problem that, in the prior art, a large amount of fouling accumulates on the cathode plate when treating wastewater using electrochemical oxidation-reduction technology, which affects the wastewater treatment efficiency. This invention has the advantages of automatically removing fouling from the cathode plate and avoiding the impact of a large amount of fouling on the efficiency of the electrolysis reaction.

[0006] The present invention is achieved through the following technical solution: The present invention discloses an electrochemical oxidation-reduction reactor for wastewater treatment, including a reaction tank and a cathode plate installed inside the reaction tank, and at least two sets of cathode plates are provided inside the reaction tank. The cathode plates are arranged longitudinally at equal intervals along the height direction of the reaction tank, and a scraper mechanism is provided inside the reaction tank.

[0007] The scraper mechanism includes a rotating shaft, a scraper assembly, and a driving component. The rotating shaft is installed inside the reaction vessel, and the top and bottom ends of the rotating shaft are rotatably connected to the top and bottom walls of the reaction vessel, respectively. The top end of the rotating shaft extends to the top of the reaction vessel and is driven by the driving component. The rotating shaft moves through the cathode plate. Each cathode plate is provided with a scraper assembly on its surface, and one end of the scraper assembly is connected to the rotating shaft.

[0008] The scraper assembly includes a scraper body and a connector. The scraper body is movably mounted on the rotating shaft via the connector. The scraping surface of the scraper body forms an adjustable gap with the surface of the cathode plate.

[0009] Furthermore, the connecting component dynamically adjusts the gap between the scraping surface of the scraper body and the cathode plate surface by driving the longitudinal displacement of the scraper body based on the resistance experienced by the scraper body.

[0010] Furthermore, the connector includes a fixed shaft, a connecting shaft, a limiting block, a control shaft, and a control unit. The rotating shaft has an internal cavity for mounting the connector. The fixed shaft is fixedly positioned at the bottom of the cavity. The connecting shaft is positioned above the fixed shaft and is rotatably mounted inside the cavity via a rotating connecting mechanism. The opposing sides of the connecting shaft and the fixed shaft are elastically connected by a torsion spring. The control shaft is positioned above the connecting shaft, with its outer wall slidingly engaging with the inner wall of the cavity. The control shaft and the connecting shaft are circumferentially limited by the insertion and engagement of the limiting block and the limiting groove. One end of the scraper body located inside the cavity is fixedly connected to the outer wall of the control shaft. A control unit is also positioned above the control shaft. The control unit drives the longitudinal displacement of the control shaft by rotating it. A spring is provided between the control shaft and the connecting shaft to provide longitudinal support for the control shaft.

[0011] Furthermore, a limit block is fixedly installed at the top of the connecting shaft, and a limit groove is opened at the bottom of the control shaft. The cross-section of the limit block is set as a polygon, and the limit block is slidably inserted into the limit groove.

[0012] Furthermore, the control unit includes a fixed plate, protrusions, and push rods. The fixed plate is fixedly mounted on the top of the receiving cavity. A protrusion is fixedly mounted on the bottom of the fixed plate, and at least two protrusions are arranged in a circular array with the center of the fixed plate as the center. The bottom surface of the protrusions is set as an inclined surface. A push rod is fixedly mounted on the top of the control shaft. The number of push rods is the same as the number of protrusions and they are arranged in a circular array with the center of the control shaft as the center. When the control shaft rotates, the protrusions are on the movement trajectory of the push rods, and the longitudinal displacement of the control shaft is caused by the contact between the push rods and the protrusions.

[0013] Furthermore, the outer wall of the receiving cavity is provided with a clearance groove to allow the scraper body to make way.

[0014] Furthermore, the connecting shaft is unidirectionally mounted inside the receiving cavity via a rotating connecting mechanism. The rotating connecting mechanism achieves unidirectional rotation of the connecting shaft through the engagement of unidirectional teeth. A reset mechanism is also provided on the rotating shaft, which is used to periodically release the unidirectional locking of the connecting shaft by the rotating connecting mechanism.

[0015] Furthermore, the rotating connection mechanism includes an outer ring, an inner ring, a one-way toothed groove, and a locking block. The outer ring is disposed inside the annular groove and is fixedly connected to the inner wall of the receiving cavity. The inner ring is fixedly sleeved on the outer wall of the connecting shaft and is located inside the outer ring. The inner wall of the outer ring is provided with a one-way toothed groove, and multiple one-way toothed grooves are provided. The outer wall of the inner ring is movably inserted with a locking block, and the locking block is elastically supported by an elastic element. The locking block is connected to a connecting rod, and the other end of the connecting rod movably extends through the outer wall of the receiving cavity to the outside of the rotating shaft.

[0016] Furthermore, the reset mechanism includes a control ring, a fixed rod, and an electric push rod. The control ring is slidably sleeved on the outside of the rotating shaft, and the upper section of the inner ring of the control ring is inclined. When the control ring moves upward, it contacts the connecting rod through the inclined surface of the upper section of the inner ring, causing the connecting rod to be squeezed and retract toward the inside of the rotating shaft. The movement of the connecting rod synchronously drives the locking block to retract. The control rings on the rotating shaft are connected to each other through the fixed rod. The bottom end of the fixed rod extends to the bottom of the outside of the reaction vessel. The longitudinal movement of the fixed rod is controlled by the electric push rod.

[0017] The present invention has the following advantages:

[0018] (1) The present invention drives the scraper body to move by rotating the shaft, thereby scraping off the dirt on the cathode plate surface, avoiding the accumulation of a large amount of dirt and affecting the electrolysis efficiency. At the same time, the dirt is automatically scraped off, making the dirt scraping work more convenient. In addition, the gap between the scraper body and the cathode plate is set to a dynamic adjustment mode, and the gap adjustment is triggered by the resistance encountered by the scraper body when scraping dirt. This allows the gap between the scraper body and the cathode plate to be adjusted adaptively when scraping dirt of different properties. For stubborn dirt, the scraper body can be lowered to reduce the gap between it and the cathode plate, increasing the pressure per unit area, thereby improving the dirt peeling strength. When the dirt adhesion is small, the pressure of the scraper can be reduced, that is, the gap between the scraper scraping surface and the cathode plate surface can be increased, thereby reducing the contact area and reducing the wear of the scraper and the cathode plate. Compared with a fixed gap, the service life of the equipment is significantly improved.

[0019] (2) The present invention sets up a rotating connection mechanism to lock the height of the scraper body in stages, so that the height of the scraper body is locked after displacement by the rotating connection mechanism. The unlocking is set to start at a time, so that after multiple cathode plate descalings can be completed, the rotating connection mechanism will automatically unlock, so that the scraper body will return to the initial height. This ensures that the scraper remains stable during the cleaning process, avoids the cleaning effect affected by the gap change, and reduces mechanical wear caused by frequent adjustments, and avoids fatigue damage to the spring support system caused by repeated gap changes. Attached Figure Description

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

[0021] Figure 2 This is a schematic diagram of the internal structure of the reaction vessel of the present invention;

[0022] Figure 3 This is a schematic diagram of the rotating shaft structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the internal structure of the receiving cavity of the present invention;

[0024] Figure 5 For the present invention Figure 3 A magnified schematic diagram of the structure at point B;

[0025] Figure 6 This is a schematic diagram of the connector structure of the present invention;

[0026] Figure 7 This is a front structural diagram of the connecting shaft and the fixed shaft of the present invention;

[0027] Figure 8 This is a schematic diagram of the control unit structure of the present invention;

[0028] Figure 9 For the present invention Figure 6 A magnified schematic diagram of the structure at point E;

[0029] Figure 10 This is a schematic diagram of the limiting groove structure of the present invention;

[0030] Figure 11 For the present invention Figure 4 A magnified schematic diagram of the structure at point D;

[0031] Figure 12 For the present invention Figure 3 A magnified schematic diagram of the structure at point C;

[0032] Figure 13 This is a schematic cross-sectional view of the control ring structure of the present invention;

[0033] Figure 14 For the present invention Figure 2 A magnified schematic diagram of the structure at point A.

[0034] In the diagram: 1. Reaction vessel; 2. Cathode plate; 3. Inlet pipe; 4. Drain pipe; 5. Scraper mechanism; 6. Clearance hole; 7. Receiving cavity; 8. Clearance groove; 9. Elastic assembly; 10. Limiting block; 11. Annular groove; 12. Chassis; 13. Rotary connection mechanism; 14. Limiting groove; 15. Slide groove; 16. Sliding block; 17. Elastic element; 18. Reset mechanism; 19. Connecting rod; 20. Connecting sleeve shaft; 501. Rotating shaft; 502. Scraper assembly; 5 03. Driving component; 521. Scraper body; 522. Connecting component; 5221. Fixed shaft; 5222. Connecting shaft; 5223. Control shaft; 5224. Control unit; 2241. Fixed plate; 2242. Protrusion; 2243. Push rod; 131. Outer ring; 132. Inner ring; 133. One-way toothed groove; 134. Locking block; 181. Control ring; 182. Fixed rod; 183. Electric push rod; 901. Torsion spring; 902. Spring. Detailed Implementation

[0035] The embodiments of the present invention are described in detail below. These embodiments are implemented based on the technical solution of the present invention, and provide detailed implementation methods and specific operation processes. However, the scope of protection of the present invention is not limited to the following embodiments. In the description of the present invention, words such as "front", "rear", "left", and "right" that indicate orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0036] The embodiments disclose an electrochemical oxidation-reduction reactor for wastewater treatment, such as Figures 1-14 As shown, it includes a reaction vessel 1 and a cathode plate 2 installed inside the reaction vessel 1, as follows: Figures 1-2 As shown, the top of the reaction vessel 1 is also equipped with a water inlet pipe 3 for water intake, while the bottom is equipped with a drain pipe 4 for drainage.

[0037] Specifically, at least two sets of cathode plates 2 are provided inside the reaction tank 1, and multiple sets of cathode plates 2 are arranged longitudinally at equal intervals along the height direction of the reaction tank 1. In addition, a notch is provided between the outer circumferential edge of the cathode plate 2 and the inner wall of the reaction tank 1, so that the sewage inside the reaction tank 1 can flow. The outer diameter of the cathode plate 2 is set to be smaller than the inner diameter of the reaction tank 1, and the cathode plate 2 is installed inside the reaction tank 1 by a mounting base.

[0038] When wastewater is treated, an oxidation-reduction reaction occurs when the cathode plate 2 is energized, which causes ions in the water to deposit on the electrode surface and form scale. The accumulation of scale will affect the electrolysis efficiency.

[0039] In order to remove the dirt on the cathode plate 2 and avoid the accumulation of dirt on the cathode plate 2 which would affect the electrolysis efficiency, a scraper mechanism 5 is provided inside the reaction vessel 1 to scrape off the dirt on the cathode plate 2. When a lot of dirt accumulates on the surface of the cathode plate 2, the scraper mechanism 5 can be used to scrape off the dirt on the cathode plate 2 to avoid the accumulation of dirt which would affect the electrolysis efficiency.

[0040] like Figures 2-5 As shown, the scraper mechanism 5 includes a rotating shaft 501, a scraper assembly 502, and a drive component 503. The rotating shaft 501 is arranged longitudinally inside the reaction vessel 1 along its height direction. The top and bottom ends of the rotating shaft 501 are rotatably connected to the top and bottom walls of the reaction vessel 1, respectively. The top end of the rotating shaft 501 extends above the top of the reaction vessel 1. The drive component 503 is installed above the reaction vessel 1. The drive component 503 is a drive motor assembly, and the output end of the drive motor assembly is connected to the rotating shaft 501. The drive unit 503 is located at the top of the reaction vessel 1 and is connected to the drive shaft 501 so that the drive unit 503 can drive the shaft 501 to rotate. It should be noted that a clearance hole 6 is provided at the center of each set of cathode plates 2 to allow the shaft 501 to move. The shaft 501 is movably inserted into the clearance hole 6. Each set of cathode plates 2 is provided with a scraper assembly 502 on its surface, and one end of the scraper assembly 502 is connected to the shaft 501 so that the rotation of the shaft 501 can drive the scraper assembly 502 to scrape off dirt from the surface of the cathode plate 2.

[0041] It should be noted that in this embodiment, the rotating shaft 501 can be configured to be assembled from multiple short shafts, and the length of the scraper assembly 502 is greater than the radius of the cathode plate 2, so that when the rotating shaft 501 rotates, the scraper assembly 502 can cover the cathode plate 2, making the removal of dirt on the surface of the cathode plate 2 more comprehensive.

[0042] When scraping the dirt on the cathode plate 2 with a scraper, for some stubborn dirt, the scraper needs to increase the pressure, that is, to reduce the gap between the scraping surface of the scraper and the surface of the cathode plate 2 to increase the pressure per unit area, thereby improving the dirt removal strength. When the dirt adhesion is small, the pressure of the scraper can be reduced, that is, to increase the gap between the scraping surface of the scraper and the surface of the cathode plate 2, thereby reducing the contact area and reducing the wear of the scraper and the cathode plate 2.

[0043] In existing technologies, the gap between the scraper and the cathode plate 2 is generally a fixed value. In order to effectively remove dirt, the gap between the scraper and the cathode plate 2 is generally set to the minimum value in actual operation. However, this will increase the friction between the scraper and the cathode plate 2. In long-term operation, this will undoubtedly increase the wear of the scraper and the cathode plate 2, thereby reducing the service life of the equipment.

[0044] To reduce the wear rate between the scraper and the cathode plate 2, in this embodiment, as follows: Figures 2-7 As shown, the gap between the scraper assembly 502 and the cathode plate 2 is set to a dynamic adjustment mode. Specifically, the gap between the scraper assembly 502 and the cathode plate 2 is set to adaptively adjust according to the nature of the dirt. In other words, under normal conditions, the gap between the scraping surface of the scraper assembly 502 and the surface of the cathode plate 2 is the maximum gap, which can scrape away some dirt with weak adhesion. However, when dealing with stubborn dirt, such as inorganic salt crystal dirt, it is necessary to increase the pressure applied by the scraper assembly 502. The resistance encountered by the scraper assembly 502 causes the scraper assembly 502 to descend, thereby reducing the gap between the scraping surface of the scraper assembly 502 and the surface of the cathode plate 2, so as to increase the applied pressure of the scraper assembly 502 and improve the dirt removal strength.

[0045] Specifically, in this embodiment, the scraper assembly 502 includes a scraper body 521 and a connector 522. The scraper body 521 is laterally disposed on one side of the rotating shaft 501, and its bottom surface is used as the scraping surface. The scraper body 521 is positioned above the cathode plate 2 and is perpendicular to the rotating shaft 501. The scraper body 521 is movably connected to the rotating shaft 501 via the connector 522, allowing it to move in both circular and longitudinal directions. By setting the elastic group 9, the scraper body 521 is elastically supported in both circumferential and longitudinal movements. When the scraper body 521 moves on the surface of the cathode plate 2 with the rotation of the rotating shaft 501, the scraper body 521 will come into contact with dirt and be obstructed by the dirt. As a result, the scraper body 521 will be compressed by the resistance. The initial pre-compression of the elastic group 9 corresponds to the maximum gap that the scraping surface of the scraper body 521 avoids with the cathode plate 2. When the resistance increases, the compression of the elastic group 9 increases, which drives the scraper body 521 to descend and reduce the gap.

[0046] Furthermore, a receiving cavity 7 is provided inside the rotating shaft 501, and the receiving cavity 7 is configured as a hole opened along the axial direction of the rotating shaft 501 and concentric with the rotating shaft 501. The connecting member 522 is provided inside the receiving cavity 7. The number of receiving cavities 7 corresponds to the number of cathode plates 2. In other words, each connecting member 522 of the scraper body 521 corresponds to one receiving cavity 7. The outer wall of the receiving cavity 7 is provided with a relief groove 8. One end of the scraper body 521 passes through the relief groove 8 and is inserted into the receiving cavity 7 and connected to the connecting member 522.

[0047] The elastic assembly 9 includes a torsion spring 901 and a spring 902. The torsion spring 901 provides elastic support for the circumferential rotation of the scraper body 521, while the spring 902 provides elastic support for the longitudinal movement of the scraper body 521.

[0048] More specifically, such as Figure 4, Figure 6 , Figure 7 , Figure 8 and 9 As shown, the connector 522 includes a fixed shaft 5221, a connecting shaft 5222, a control shaft 5223, and a control unit 5224. The fixed shaft 5221 is fixedly disposed at the bottom of the receiving cavity 7 and is fixedly connected to the bottom wall of the receiving cavity 7 and is concentrically disposed with the rotating shaft 501. The connecting shaft 5222 is rotatably disposed above the fixed shaft 5221. A central shaft is fixedly disposed at the bottom of the connecting shaft 5222 and the bottom end of the central shaft is rotatably connected to the fixed shaft 5221. In addition, the connecting shaft 5222 is also rotatably disposed inside the receiving cavity 7 through a rotating connecting mechanism 13. It should be noted that the connecting shaft 5222 can only rotate circumferentially inside the receiving cavity 7 and cannot move longitudinally.

[0049] The opposing sides of the connecting shaft 5222 and the fixed shaft 5221 are elastically connected by a torsion spring 901. A control shaft 5223 is provided above the connecting shaft 5222. The control shaft 5223 is concentric with the rotating shaft 501. The outer wall of the control shaft 5223 is in contact with and slides against the inner wall of the receiving cavity 7. In addition, the control shaft 5223 and the connecting shaft 5222 are circumferentially limited by the insertion and engagement of the limiting block 10 and the limiting groove 14, so that the control shaft 5223 and the connecting shaft 5222 rotate synchronously.

[0050] like Figure 9 and Figure 10 As shown, a limiting block 10 is fixedly installed at the top center of the connecting shaft 5222, and a limiting groove 14 that mates with the limiting block 10 is opened at the bottom of the control shaft 5223. The cross-section of the limiting block 10 is polygonal, specifically quadrilateral in this embodiment. The limiting block 10 is slidably inserted into the limiting groove 14, thereby allowing the control shaft 5223 and the connecting shaft 5222 to rotate synchronously, and the control shaft 5223 can also move longitudinally above the connecting shaft 5222. Figure 4 , Figure 6 , Figure 7 , Figure 8 As shown, one end of the scraper body 521 located inside the receiving cavity 7 is fixedly connected to the outer wall of the control shaft 5223. A control unit 5224 is also provided above the control shaft 5223. When the scraper body 521 deflects, the control shaft 5223 rotates, and the control unit 5224 controls the control shaft 5223 to move downward, thereby causing the scraper body 521 to move downward, adjusting the gap between the scraping surface of the scraper body 521 and the surface of the cathode plate 2, thereby adjusting the pressure of the scraper body 521.

[0051] In addition, a spring 902 is provided between the control shaft 5223 and the connecting shaft 5222. The spring 902 is used to provide longitudinal support for the control shaft 5223, and thus provide longitudinal elastic support for the scraper body 521. The torsion spring 901 is specifically configured to rebound the connecting shaft 5222 in the direction of rotation of the rotating shaft 501. In other words, the torsion spring 901 causes the scraper body 521 to rebound in the direction of scraper movement when the rotating shaft 501 rotates.

[0052] It should be noted that, as Figure 5 As shown, the height and width of the clearance groove 8 are both greater than the height and width of the scraper body 521, so that the scraper body 521 has space to move downward and rotate. In the initial state, the top surface of the scraper body 521 is in contact with the top wall of the clearance groove 8, thereby limiting the maximum height of the scraper body 521. The forward surface of the scraper body 521 during the scraping movement is in contact with the corresponding inner wall of the clearance groove 8.

[0053] Specifically, such as Figure 6 and Figure 8 As shown, the control unit 5224 includes a fixed disk 2241, a protrusion 2242, and a push rod 2243. The fixed disk 2241 is disposed on the top of the receiving cavity 7, and its top wall is fixedly connected to the top wall of the receiving cavity 7. The fixed disk 2241 is concentrically arranged with the rotating shaft 501. A protrusion 2242 is fixedly disposed on the bottom of the fixed disk 2241, and at least two protrusions 2242 are provided. In this embodiment, three protrusions 2242 are specifically provided. The three protrusions 2242 are respectively disposed on the lower end face of the fixed disk 2241 near the outer circumferential edge, and are arranged in a circular array with the center of the fixed disk 2241 as the center. In a top view, the protrusions 2242 appear arc-shaped and are concentrically arranged with the fixed disk 2241. This can be understood as the three... The protrusions 2242 form a ring and are concentrically arranged with the fixed disk 2241. The top of the control shaft 5223 is fixedly provided with a push rod 2243, and the number of push rods 2243 is the same as the number of protrusions 2242. In addition, the push rods 2243 are arranged in a ring array with the center of the control shaft 5223 as the center. The distance between the push rod 2243 and the center of the rotating shaft 501 is the same as the distance between the protrusions 2242 and the center of the rotating shaft 501. The top of the push rod 2243 is in contact with the bottom surface of the fixed disk 2241. When the control shaft 5223 rotates, the protrusions 2242 are on the movement trajectory of the push rods 2243. In other words, when the control shaft 5223 rotates, the push rods 2243 rotate accordingly. The push rods 2243 can move from the bottom surface of the fixed disk 2241 to the bottom surface of the protrusions 2242.

[0054] More specifically, the bottom surface of the protrusion 2242 is set as an inclined surface, and the inclined surface is specifically set to extend downward from a point on the bottom surface of the fixed disk 2241 and extend circumferentially along the circumference of the fixed disk 2241. The edge of the inclined surface smoothly transitions with the bottom surface of the fixed disk 2241, while the side wall of the protrusion 2242 is a straight surface. The protrusion 2242 is specifically in the shape of a right triangle. In the initial state, the top of the push rod 2243 is in contact with the bottom surface of the fixed disk 2241. As the control shaft 5223 rotates, the push rod 2243 can be guided by the inclined surface of the protrusion 2242 on the bottom surface of the fixed disk 2241 to descend, thereby driving the control shaft 5223 to descend, thus realizing the downward movement of the scraper body 521.

[0055] It should be noted that the inclined surface of the bottom surface of the protrusion 2242 is set such that when the scraper body 521 moves in the opposite direction to the rotation of the rotating shaft 501, the control shaft 5223 drives the push rod 2243 to move and moves downward through the inclined surface at the bottom of the protrusion 2242. In addition, in this embodiment, the top of the push rod 2243 is set as a spherical surface, and the contact surfaces of the push rod 2243 and the protrusion 2242 can be provided with a wear-resistant coating.

[0056] Therefore, through the above configuration, when scraping away dirt, the rotation of the rotating shaft 501 causes the internal fixed shaft 5221 to rotate. The fixed shaft 5221 and the connecting shaft 5222 are supported by a torsion spring 901. The connecting shaft 5222 rotates synchronously with the rotating shaft 501. Therefore, the control shaft 5223 drives the scraper body 521 to rotate synchronously. When the scraper body 521 comes into contact with dirt, the scraper body 521 is obstructed by the dirt, and the scraper body 521 moves in the opposite direction to the direction of movement of the rotating shaft 501. During the scraping motion, the scraper body 521 rotates synchronously, causing the control shaft 5223 to rotate synchronously. The control shaft 5223 then drives the connecting shaft 5222 to rotate synchronously, compressing the torsion spring 901. Here, the degree of dirt adhesion is directly proportional to the resistance experienced by the scraper body 521. That is, the greater the dirt adhesion, the greater the resistance experienced by the scraper body 521 during scraping. This resistance is manifested in the torsion spring 901; in other words, the more difficult the dirt is to remove, the greater the compression of the torsion spring 901. At this time, the control shaft... The larger the rotation angle of 5223, the greater the travel of the push rod 2243 on the inclined surface at the bottom of the protrusion 2242. Therefore, through the arrangement of the protrusion 2242 and the push rod 2243, when the control shaft 5223 rotates, the greater the rotation angle of the control shaft 5223, the greater the travel distance of the push rod 2243 on the inclined surface at the bottom of the protrusion 2242. The inclined surface design makes the downward movement of the push rod 2243 gradual; the greater the rotation angle of the control shaft 5223, the greater its downward movement distance, which in turn drives the scraper body 521 downward, adjusting the gap between the scraper body 521 and the surface of the cathode plate 2, improving the scraping efficiency. The pressure applied to the plate body 521 increases the dirt removal strength, thereby allowing the gap between the scraper body 521 and the surface of the cathode plate 2 to be adaptively adjusted according to the adhesion of the dirt. Only when dealing with stubborn dirt will the scraper body 521 lower its displacement to reduce the gap with the surface of the cathode plate 2. When dealing with dirt with weak adhesion, the scraper body 521 and the surface of the cathode plate 2 maintain a slightly larger gap. In this way, the relatively fixed gap can significantly reduce the wear of the scraper body 521 and the cathode plate 2 and improve the service life.

[0057] Additionally, in this embodiment, as Figure 4 , Figure 6 , Figure 8 , Figure 9 and Figure 11As shown, the rotating connection mechanism 13 is configured as a one-way connection, so that the rotating connection between the connecting shaft 5222 and the receiving cavity 7 is unidirectional. Specifically, when the scraper body 521 is subjected to resistance, causing the connecting shaft 5222 to rotate, it cannot return to its original rotation. This limits the rotation of the connecting shaft 5222. Correspondingly, the downward movement height through the control unit 5224 is also limited. This allows the scraper body 521 to maintain a fixed gap after the gap changes, ensuring that the scraper remains stable during the cleaning process. This avoids affecting the cleaning effect due to gap changes, while reducing mechanical wear caused by frequent adjustments and preventing fatigue damage to the spring support system caused by repeated gap changes.

[0058] In addition, in this embodiment, the rotating connection mechanism 13 is configured such that after the rotating shaft 501 rotates at least two times and the scraper body 521 scrapes the cathode plate 2 at least twice, the rotating connection mechanism 13 can automatically unlock and release the one-way limit on the connecting shaft 5222. For example, in this embodiment, it is specifically configured that after the rotating shaft 501 rotates two times and the scraper body 521 scrapes the cathode plate 2 twice, the one-way lock of the rotating connection mechanism 13 on the connecting shaft 5222 can be unlocked, so that the connecting shaft 5222 rebounds and rotates to reset under the action of the torsion spring 901, thereby resetting the height of the control shaft 5223 and restoring the gap of the scraper body 521 to its initial state.

[0059] Specifically, such as Figure 4 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 11As shown, an annular groove 11 is formed on the outer wall of the connecting shaft 5222. The annular groove 11 is used to install the rotating connecting mechanism 13. The rotating connecting mechanism 13 includes an outer ring 131, an inner ring 132, a one-way toothed groove 133, and a locking block 134. The outer ring 131 is disposed inside the annular groove 11, and the outer circumference of the outer ring 131 is fixedly connected to the inner wall of the receiving cavity 7. The inner ring 132 is disposed inside the outer ring 131. The inner ring 132 is located inside the annular groove 11 and is fixedly sleeved on the outer wall of the connecting shaft 5222. The inner ring 132 is concentric with the outer ring 131 and concentric with the connecting shaft 5222. The inner wall of the inner ring of the outer ring 131 is provided with a one-way toothed groove 133, and multiple one-way toothed grooves 133 are provided, with the outer ring 131 as the center of the multiple one-way toothed grooves 133. The inner ring array is configured such that one side of the inner wall of the unidirectional tooth groove 133 is a straight wall, while the other side is an inclined surface. A locking block 134 is movably inserted into the outer wall of the inner ring 132, and the locking block 134 is elastically supported by an elastic element 17. The locking block 134 is inserted into the unidirectional tooth groove 133. Through the elastic support of the locking block 134 and the unidirectional tooth groove 133, the connecting shaft 5222 can rotate in one direction. When the scraper body 521 encounters resistance, the connecting shaft 5222 rotates, and the locking block 134 on the connecting shaft 5222 can retract through the inclined surface of the unidirectional tooth groove 133. Conversely, through the straight wall on the other side of the unidirectional tooth groove 133, the locking block 134 cannot retract, thus locking the connecting shaft 5222 in one direction.

[0060] In order to unlock the one-way locking of the rotating connection mechanism 13, such as Figure 11 As shown, a groove 15 is provided inside the inner ring 132 near the outer circumference of the inner ring 132. A slider 16 is slidably disposed inside the groove 15. A locking block 134 is fixedly disposed at one end of the slider 16 facing the outer circumference of the inner ring 132. One end of the locking block 134 extends through the outer wall of the groove 15 to the outside of the inner ring 132 and inserts into the one-way toothed groove 133. An elastic element 17 is provided at the other end of the locking block 134 for elastic support, thereby allowing the locking block 134 to slide and be supported by the elastic element 17. Additionally, as shown... Figure 9 As shown, a connecting rod 19 is fixedly provided on the top of the slider 16, and the other end of the connecting rod 19 extends through the outer wall of the receiving cavity 7 to the outside of the rotating shaft 501.

[0061] like Figure 3 and Figure 12 As shown, a reset mechanism 18 is also provided. The reset mechanism 18 is used to unlock the one-way lock of the rotating connection mechanism 13 on the connecting shaft 5222 when the rotating shaft 501 is timed. It should be noted that the timing is controlled so that the rotating shaft 501 completes at least two rotations to unlock the rotating connection mechanism 13, thereby resetting the scraper body 521.

[0062] like Figure 3 , Figure 12 , Figure 13 and Figure 14 As shown, the reset mechanism 18 includes a control ring 181, a fixed rod 182, and an electric push rod 183. The control ring 181 is slidably sleeved on the outside of the rotating shaft 501, and the upper section of the inner ring of the control ring 181 is an inclined surface. Under normal conditions, the control ring 181 is located below the connecting rod 19. When it is necessary to restore the scraper body 521 to its initial gap, the control ring 181 is raised. The inclined surface of the upper section of the inner ring of the control ring 181 contacts and guides one end of the connecting rod 19, causing the end of the connecting rod 19 located outside the rotating shaft 501 to be squeezed towards the inside of the rotating shaft 501, thereby causing it to contract. When the connecting rod 19 contracts, it drives the slider 16 to move, causing the slider 16 to move and drive the locking block 134 to contract into the groove 15. After the locking block 134 is no longer limited, the connecting shaft 5222 can be reset and rotated by the action of the torsion spring 901, thereby restoring the scraper body 521 to its initial gap. After the connecting shaft 5222 is reset, the control ring 181 descends and resets.

[0063] The control rings 181 on the rotating shaft 501 are all connected to each other by the fixed rods 182. The bottom end of the fixed rods 182 extends to the bottom of the outside of the reaction vessel 1, and the longitudinal movement of the fixed rods 182 is controlled by the electric push rod 183. In this embodiment, the electric push rod 183 can be started at a time, so that after the rotating shaft 501 rotates a fixed number of times, the electric push rod 183 starts to drive the control rings 181 to perform a reciprocating motion. The electric push rod 183 causes the control rings 181 to rise, thereby releasing the one-way locking of the rotating connection mechanism 13, so that the connecting shaft 5222 resets and rotates, and drives the gap between the scraping surface of the scraper body 521 and the surface of the cathode plate 2 to return to the initial gap. When scraping again, the scraper body 521 can adaptively adjust its height again according to the resistance it receives.

[0064] It should be noted that a connecting sleeve 20 is fixedly sleeved at the bottom of the rotating shaft 501, and the connecting sleeve 20 is rotatably connected to the bottom of the reaction vessel 1. The fixing rod 182 extends through the connecting sleeve 20 to the bottom of the reaction vessel 1. A chassis 12 is fixedly connected to one end of the fixing rod 182 located outside the reaction vessel 1, and the telescopic shaft of the electric push rod 183 is rotatably connected to the chassis 12, thereby preventing the rotation of the rotating shaft 501 and the fixing rod 182 from causing the electric push rod 183 to rotate.

[0065] The principle of this invention is as follows: When scraping away dirt, the drive component 503 causes the rotating shaft 501 to rotate. The rotation of the rotating shaft 501 causes the internal connecting shaft 5222 to rotate synchronously. The control shaft 5223 rotates synchronously and drives the scraper body 521 to rotate synchronously. When the scraper body 521 comes into contact with dirt, it is obstructed by the dirt and moves in the opposite direction to the rotation of the rotating shaft 501. This movement of the scraper body 521 drives the control shaft 5223 to move forward. When the control shaft 5223 rotates synchronously, it drives the connecting shaft 5222 to rotate synchronously and compress the torsion spring 901. Through the arrangement of the protrusion 2242 and the push rod 2243, as the control shaft 5223 rotates, the greater the rotation angle of the control shaft 5223, the greater the travel distance of the push rod 2243 on the inclined surface at the bottom of the protrusion 2242. The inclined surface design makes the downward movement of the push rod 2243 gradual; the greater the rotation angle of the control shaft 5223, the greater its downward distance, thereby driving the scraper body 521 downward. The gap between the scraper body 521 and the surface of the cathode plate 2 is adjusted to increase the applied pressure of the scraper body 521 and improve the dirt removal strength. This allows the gap between the scraper body 521 and the surface of the cathode plate 2 to be adaptively adjusted according to the adhesion of the dirt. The electric push rod 183 is activated periodically, so that after the scraper body 521 has scraped the cathode plate 2 a fixed number of times, the electric push rod 183 is activated, causing the control ring 181 to rise via the fixing rod 182. This is achieved by adjusting the upper section of the inner ring of the control ring 181. The inclined plane guides the connecting rod 19 so that the end outside the rotating shaft 501 is retracted towards the inside of the rotating shaft 501, thereby causing the slider 16 to move and drive the locking block 134 to retract into the slide groove 15. After the locking block 134 is no longer in place, the connecting shaft 5222 can be reset and rotated by the action of the torsion spring 901, thereby causing the scraper body 521 to automatically restore the initial gap. This ensures that each time dirt is scraped, the scraper body 521 adjusts the gap according to the nature of the dirt and automatically restores the initial gap after scraping for a fixed time.

[0066] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An electrochemical oxidation-reduction reactor for wastewater treatment, comprising a reaction vessel (1) and cathode plates (2) installed inside the reaction vessel (1), wherein at least two sets of cathode plates (2) are provided inside the reaction vessel (1), and the cathode plates (2) are arranged longitudinally at equal intervals along the height direction of the reaction vessel (1), characterized in that, The reaction vessel (1) is equipped with a scraper mechanism (5); The scraper mechanism (5) includes a rotating shaft (501), a scraper assembly (502), and a driving component (503). The rotating shaft (501) is provided inside the reaction tank (1), and the top and bottom ends of the rotating shaft (501) are rotatably connected to the top and bottom walls of the reaction tank (1), respectively. The top end of the rotating shaft (501) extends to the top of the reaction tank (1) and is driven by the driving component (503). The rotating shaft (501) moves through the cathode plate (2). Each cathode plate (2) is provided with a scraper assembly (502) on its surface. One end of the scraper assembly (502) is connected to the rotating shaft (501). The scraper assembly (502) includes a scraper body (521) and a connector (522). The scraper body (521) is movably mounted on the rotating shaft (501) via the connector (522). The scraping surface of the scraper body (521) forms an adjustable gap with the surface of the cathode plate (2). The connecting member (522) dynamically adjusts the gap between the scraping surface of the scraping body (521) and the surface of the cathode plate (2) by driving the longitudinal displacement of the scraping body (521) based on the resistance received by the scraping body (521). The connector (522) includes a fixed shaft (5221), a connecting shaft (5222), a limiting block (10), a control shaft (5223), and a control unit (5224). The rotating shaft (501) has an internal cavity (7) for mounting the connector (522). The fixed shaft (5221) is fixedly disposed at the bottom of the cavity (7). The connecting shaft (5222) is disposed above the fixed shaft (5221), and the connecting shaft (5222) is rotatably disposed inside the cavity (7) via a rotating connecting mechanism (13). The opposing sides of the connecting shaft (5222) and the fixed shaft (5221) are elastically connected by a torsion spring (901). The control shaft (5224) is disposed above the connecting shaft (5222). 23), the outer wall of the control shaft (5223) slides with the inner wall of the receiving cavity (7), and the control shaft (5223) and the connecting shaft (5222) are limited in the circumferential direction by the insertion of the limiting block (10) and the limiting groove (14). The scraper body (521) is fixedly connected to the outer wall of the control shaft (5223) at one end inside the receiving cavity (7). A control part (5224) is also provided above the control shaft (5223). The control part (5224) drives the longitudinal displacement of the control shaft (5223) by the rotation of the control shaft (5223). A spring (902) is provided between the control shaft (5223) and the connecting shaft (5222) to provide longitudinal support for the control shaft (5223).

2. The electrochemical oxidation-reduction reactor for wastewater treatment as described in claim 1, characterized in that, A limiting block (10) is fixedly provided at the top of the connecting shaft (5222), and a limiting groove (14) is opened at the bottom of the control shaft (5223). The cross section of the limiting block (10) is set as a polygon, and the limiting block (10) is slidably inserted into the limiting groove (14).

3. The electrochemical oxidation-reduction reactor for wastewater treatment as described in claim 2, characterized in that, The control unit (5224) includes a fixed disk (2241), a protrusion (2242), and a push rod (2243). The fixed disk (2241) is fixedly disposed on the top of the receiving cavity (7). A protrusion (2242) is fixedly disposed on the bottom of the fixed disk (2241), and at least two protrusions (2242) are arranged in a circular array with the center of the fixed disk (2241) as the center. The bottom surface of the protrusion (2242) is set as an inclined surface. The control shaft A top rod (2243) is fixedly installed on the top of (5223). The number of top rods (2243) is the same as the number of protrusions (2242), and they are arranged in a circular array with the center of the control shaft (5223) as the center. When the control shaft (5223) rotates, the protrusions (2242) are on the movement trajectory of the top rods (2243), and the control shaft (5223) is longitudinally displaced through the contact between the top rods (2243) and the protrusions (2242).

4. The electrochemical oxidation-reduction reactor for wastewater treatment as described in claim 3, characterized in that, The outer wall of the receiving cavity (7) is provided with a clearance groove (8) to allow the scraper body (521) to make way.

5. The electrochemical oxidation-reduction reactor for wastewater treatment as described in claim 4, characterized in that, The connecting shaft (5222) is unidirectionally rotated inside the receiving cavity (7) by a rotating connecting mechanism (13). The rotating connecting mechanism (13) enables the unidirectional rotation of the connecting shaft (5222) through the engagement of unidirectional teeth. A reset mechanism (18) is also provided on the rotating shaft (501). The reset mechanism (18) is used to periodically release the unidirectional locking of the connecting shaft (5222) by the rotating connecting mechanism (13).

6. The electrochemical oxidation-reduction reactor for wastewater treatment as described in claim 5, characterized in that, The rotating connection mechanism (13) includes an outer ring (131), an inner ring (132), a one-way toothed groove (133), and a locking block (134). The outer ring (131) is disposed inside the annular groove (11) and is fixedly connected to the inner wall of the receiving cavity (7). The inner ring (132) is fixedly sleeved on the outer wall of the connecting shaft (5222) and is located in the inner ring of the outer ring (131). The inner wall of the inner ring of the outer ring (131) is provided with a one-way toothed groove (133), and there are multiple one-way toothed grooves (133). The outer wall of the inner ring (132) is movably inserted with a locking block (134), and the locking block (134) is elastically supported by an elastic element (17). The locking block (134) is connected to a connecting rod (19), and the other end of the connecting rod (19) moves through the outer wall of the receiving cavity (7) and extends to the outside of the rotating shaft (501).

7. The electrochemical oxidation-reduction reactor for wastewater treatment as described in claim 6, characterized in that, The reset mechanism (18) includes a control ring (181), a fixed rod (182), and an electric push rod (183). The control ring (181) is slidably sleeved on the outside of the rotating shaft (501), and the upper section of the inner ring of the control ring (181) is inclined. When the control ring (181) moves upward, it contacts the connecting rod (19) through the inclined surface of the upper section of the inner ring, so that the connecting rod (19) is squeezed and retracts towards the inside of the rotating shaft (501). The movement of the connecting rod (19) synchronously drives the locking block (134) to retract. The control rings (181) on the rotating shaft (501) are connected to each other through the fixed rod (182). The bottom end of the fixed rod (182) extends to the bottom outside the reaction vessel (1). The longitudinal movement of the fixed rod (182) is controlled by the electric push rod (183).

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