Electrochemical oxidation reduction reactor for sewage treatment

Abstract

The invention discloses an electrochemical oxidation reduction reactor for sewage treatment, and relates to the technical field of sewage, the electrochemical oxidation reduction reactor comprises a reaction tank and cathode plates mounted in the reaction tank, at least two groups of cathode plates are arranged in the reaction tank, the reaction tank is also provided with a scraper mechanism, the scraper mechanism comprises a rotating shaft, a scraper assembly and a driving part, the scraping plate assembly comprises a scraping plate body and a connecting piece, the scraping plate body is movably mounted on the rotating shaft through the connecting piece, and an adjustable gap is formed between the scraping surface of the scraping plate body and the surface of the negative plate. The problem that in the prior art, when sewage is treated through an electrochemical oxidation-reduction technology, a large amount of dirt is accumulated on a negative plate, and the sewage treatment efficiency is affected is solved. The device has the advantages that dirt on the cathode plate is automatically removed, a large amount of dirt is prevented from influencing the electrolytic reaction efficiency, the gap between the scraper and the cathode plate can be dynamically adjusted according to the dirt property, abrasion is reduced, the service life is prolonged and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage, and in particular to an electrochemical redox reactor for sewage treatment. Background Art

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

[0003] In the existing technology, when sewage is treated by electrochemical redox technology, a large amount of dirt will be attached to the cathode plate. The accumulation of dirt on the cathode plate will affect the efficiency of the electrolysis reaction because the current density distribution will be uneven, resulting in overload in some areas and side reactions such as hydrogen evolution corrosion. This will increase energy consumption, reduce current efficiency, and may also shorten the life of the electrode. In addition, the dirt may also block the flow of the electrolyte, affect the mass transfer efficiency, and lead to a decrease in the treatment effect.

[0004] In response to the above technical problems, the present invention discloses an electrochemical redox reactor for sewage treatment, which has the advantages of automatically removing dirt on the cathode plate and preventing a large amount of dirt from affecting the efficiency of the electrolysis reaction. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide an electrochemical redox reactor for sewage treatment to solve the technical problems in the existing technology that when sewage is treated by electrochemical redox technology, a large amount of dirt accumulates on the cathode plate, affecting the sewage treatment efficiency. The present invention has the advantages of automatically removing the dirt on the cathode plate and avoiding a large amount of dirt affecting the efficiency of the electrolysis reaction.

[0006] The present invention is achieved through the following technical solutions: The present invention discloses an electrochemical redox reactor for sewage treatment, comprising a reaction tank and a cathode plate installed inside the reaction tank, wherein at least two groups of cathode plates are arranged inside the reaction tank, and the cathode plates are arranged equidistantly in the longitudinal direction of the height of the reaction tank, and a scraper mechanism is provided inside the reaction tank; The scraper mechanism includes a rotating shaft, a scraper assembly and a driving member. The rotating shaft is provided inside the reaction tank, and the top and bottom ends of the rotating shaft are rotatably connected to the top wall and bottom wall of the reaction tank respectively. The top end of the rotating shaft extends above the top of the reaction tank and is driven by the driving member. The rotating shaft moves through the cathode plate. The surface of each cathode plate is provided with a scraper assembly, and one end of the scraper assembly is connected to the rotating shaft. The scraper assembly includes a scraper body and a connecting piece. The scraper body is movably mounted on the rotating shaft through the connecting piece. The scraping surface of the scraper body forms an adjustable gap with the surface of the cathode plate.

[0007] Furthermore, the connecting piece drives the longitudinal displacement of the scraper body according to the resistance encountered by the scraper body, thereby realizing dynamic adjustment of the gap between the scraping surface of the scraper body and the surface of the cathode plate.

[0008] Furthermore, the connecting member includes a fixed shaft, a connecting shaft, a limit block, a control shaft and a control part. An accommodating chamber is opened inside the rotating shaft for installing the connecting member. The fixed shaft is fixedly arranged at the bottom of the accommodating chamber. A connecting shaft is arranged above the fixed shaft, and the connecting shaft is rotatably arranged inside the accommodating chamber through a rotating connection mechanism. The facing sides of the connecting shaft and the fixed shaft are elastically connected by a torsion spring. A control shaft is arranged above the connecting shaft. The outer wall of the control shaft slides with the inner wall of the accommodating chamber, and the control shaft and the connecting shaft are limited in the circumferential direction by the plug-in fit of the limit block and the limit groove. One end of the scraper body is located inside the accommodating chamber and is fixedly connected to the outer wall of the control shaft. A control part is also arranged above the control shaft. The control part drives and controls the longitudinal displacement of the control shaft through the rotation of the control shaft. A spring is arranged between the control shaft and the connecting shaft for longitudinally supporting the control shaft.

[0009] Furthermore, a limit block is fixedly provided on the top of the connecting shaft, a limit slot is provided on the bottom of the control shaft, and the cross section of the limit block is set to a polygon, and the limit block is slidably inserted into the limit slot.

[0010] Furthermore, the control part includes a fixed disk, a protrusion and a push rod. The fixed disk is fixedly set on the top of the accommodating cavity. The bottom of the fixed disk is fixedly provided with a protrusion, and there are at least two protrusions and they are arranged in a circular array with the center of the fixed disk as the center. The bottom surface of the protrusion is set as an inclined surface. The top of the control shaft is fixedly provided with a push rod. 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 protrusion is on the movement trajectory of the push rod and the control shaft is longitudinally displaced through contact between the push rod and the protrusion.

[0011] Furthermore, a recess is provided on the outer wall of the accommodating cavity to allow the scraper body to make way.

[0012] Furthermore, the connecting shaft is arranged inside the accommodating cavity for unidirectional rotation through a rotating connecting mechanism. The rotating connecting mechanism realizes unidirectional rotation of the connecting shaft through the cooperation of the one-way teeth. A reset mechanism is also provided on the rotating shaft. The reset mechanism is used to periodically release the unidirectional lock of the connecting shaft by the rotating connecting mechanism.

[0013] Furthermore, the rotating connection mechanism includes an outer ring, an inner ring, a one-way tooth groove and a clamping block. The outer ring is arranged inside the annular groove and fixedly connected to the inner wall of the accommodating cavity. The inner ring is fixedly sleeved on the outer wall of the connecting shaft and is located in the inner ring of the outer ring. The inner wall of the inner ring of the outer ring is provided with a one-way tooth groove, and there are multiple one-way tooth grooves. The outer wall of the inner ring is movably plugged with a clamping block, and the clamping block is elastically supported by an elastic member. The clamping block is connected to a connecting rod, and the other end of the connecting rod is movably passed through the outer wall of the accommodating cavity and extends to the outside of the rotating shaft.

[0014] 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 an inclined surface. The control ring is used to squeeze the connecting rod and shrink toward the inside of the rotating shaft through the contact between the upper section of the inner ring inclined surface and the connecting rod when it moves upward. The movement of the connecting rod synchronously drives the block to shrink. 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 outside the reaction tank. The longitudinal movement of the fixed rod is controlled by the electric push rod.

[0015] The present invention has the following advantages: (1) The present invention drives the scraper body to move by rotating the shaft, thereby scraping off the dirt on the surface of the cathode plate, avoiding the accumulation of a large amount of dirt that affects the electrolysis efficiency, and automatically scraping off the dirt, 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 adjustment of the gap is triggered by the resistance encountered by the scraper body when scraping the dirt. Therefore, when scraping dirt of different properties, the gap between the scraper body and the cathode plate can be adaptively adjusted. For stubborn dirt, the scraper body can be lowered to reduce the gap between it and the cathode plate, increase the pressure per unit area, and thus improve the dirt peeling strength. When the dirt adhesion is small, the pressure of the scraper can be reduced, that is, the gap between the scraping surface of the scraper and the cathode plate surface is increased, thereby reducing the contact area and reducing the wear of the scraper and the cathode plate, and significantly improving the service life of the equipment relative to a fixed gap.

[0016] (2) The present invention sets a rotating connection mechanism to lock the height of the scraper body in stages through the rotating connection mechanism, so that the scraper body is locked in height through the rotating connection mechanism after displacement, and the unlocking is set to start at a time, so that after the cathode plate is descaled for many times, the rotating connection mechanism is automatically unlocked, so that the scraper body returns to its initial height, thereby ensuring that the scraper remains stable during the cleaning process, avoiding the cleaning effect affected by the change in the gap, and at the same time reducing the mechanical wear caused by frequent adjustments, and avoiding fatigue damage to the spring support system caused by repeated changes in the gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the internal structure of the reaction tank of the present invention; Figure 3 It is a schematic diagram of the rotating shaft structure of the present invention; Figure 4 This is a schematic diagram of the internal structure of the accommodating cavity of the present invention; Figure 5 For the present invention Figure 3 A schematic diagram of the partially enlarged structure at point B; Figure 6 It is a schematic diagram of the structure of the connector of the present invention; Figure 7 This is a schematic diagram of the front structure of the connecting shaft and the fixed shaft of the present invention; Figure 8 Schematic diagram of the control unit structure of the present invention; Figure 9 For the present invention Figure 6 A schematic diagram of the local enlarged structure at E; Figure 10 It is a schematic diagram of the limiting groove structure of the present invention; Figure 11 For the present invention Figure 4 A schematic diagram of the local enlarged structure at D; Figure 12 For the present invention Figure 3 A schematic diagram of the partially enlarged structure at point C; Figure 13 This is a schematic cross-sectional view of the control ring structure of the present invention; Figure 14 For the present invention Figure 2 Schematic diagram of the local enlarged structure at point A.

[0018] Figure: 1, reaction tank; 2, cathode plate; 3, water inlet pipe; 4, drain pipe; 5, scraper mechanism; 6, clearance hole; 7, accommodating chamber; 8, clearance groove; 9, elastic group; 10, limit block; 11, annular groove; 12, chassis; 13, rotating connection mechanism; 14, limit groove; 15, slide; 16, slider; 17, elastic member; 18, reset mechanism; 19, connecting rod; 20, connecting sleeve; 501, rotating shaft; 502, scraper assembly; 5 03. Driving part; 521. Scraper body; 522. Connecting part; 5221. Fixed shaft; 5222. Connecting shaft; 5223. Control shaft; 5224. Control part; 2241. Fixed disk; 2242. Bump; 2243. Push rod; 131. Outer ring; 132. Inner ring; 133. One-way tooth groove; 134. Block; 181. Control ring; 182. Fixed rod; 183. Electric push rod; 901. Torsion spring; 902. Spring. DETAILED DESCRIPTION

[0019] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented based on the technical solution of the present invention, and a detailed implementation method and specific operation process are given. However, the scope of protection of the present invention is not limited to the following embodiment. In the description of the present invention, words indicating directions or positional relationships such as "front", "rear", "left", and "right" 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 direction, be constructed and operated in a specific direction. Therefore, it should not be understood as a limitation on the present invention.

[0020] The embodiment discloses an electrochemical redox reactor for sewage treatment, such as Figures 1-14 As shown, it includes a reaction tank 1 and a cathode plate 2 installed inside the reaction tank 1, as shown in FIG. Figure 1-Figure 2 As shown, a water inlet pipe 3 for water inlet is provided on the top of the reaction tank 1, and a drain pipe 4 for water discharge is provided on the bottom thereof.

[0021] Specifically, at least two groups of cathode plates 2 are arranged inside the reaction tank 1, and multiple groups of cathode plates 2 are arranged equidistantly in the longitudinal direction of the height direction of the reaction tank 1. In addition, a gap is provided between an 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, and 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 through a mounting seat.

[0022] When sewage is treated, an oxidation-reduction reaction will occur when the cathode plate 2 is energized, causing ions in the water to deposit on the electrode surface to form dirt. The accumulation of dirt will affect the electrolysis efficiency.

[0023] In order to remove the dirt on the cathode plate 2 and avoid the accumulation of too much dirt on the cathode plate 2 and affecting the electrolysis efficiency, a scraper mechanism 5 is provided inside the reaction tank 1 for scraping 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 the dirt on the cathode plate 2 to avoid the accumulation of too much dirt and affecting the electrolysis efficiency.

[0024] like Figure 2-Figure 5As shown, the scraper mechanism 5 includes a rotating shaft 501, a scraper assembly 502 and a driving member 503, wherein the rotating shaft 501 is provided inside the reaction tank 1 along the height direction of the reaction tank 1, the rotating shaft 501 is longitudinally provided inside the reaction tank 1, and the top and bottom ends of the rotating shaft 501 are rotatably connected to the top wall and bottom wall of the reaction tank 1 respectively, and the top end of the rotating shaft 501 extends above the top of the reaction tank 1, and a driving member 503 is installed above the reaction tank 1, and the driving member 503 is provided as a driving motor assembly, and the output end of the driving motor assembly is connected to the rotating shaft 50 1 is connected to one end above the reaction tank 1, so that the driving member 503 can drive the rotating shaft 501 to rotate. It should be noted that a clearance hole 6 is opened at the center of each group of cathode plates 2, so as to make way for the rotating shaft 501. The rotating shaft 501 is movably inserted into the clearance hole 6. A scraper assembly 502 is provided on the surface of each group of cathode plates 2, and one end of the scraper assembly 502 is connected to the rotating shaft 501, so that the rotation of the rotating shaft 501 can drive the scraper assembly 502 to scrape dirt from the surface of the cathode plate 2.

[0025] 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, so that the dirt on the surface of the cathode plate 2 can be scraped more comprehensively.

[0026] When scraping the dirt on the cathode plate 2 with a scraper, for some stubborn dirt, the scraper needs to increase 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 peeling strength. When the dirt adhesion is weak, the scraper pressure 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. In the prior art, the gap between the scraper and the cathode plate 2 is generally a fixed value, and in order to effectively scrape off the dirt, in actual work, the gap between the scraper and the cathode plate 2 is generally set to a minimum value, but this will increase the friction between the scraper and the cathode plate 2. During long-term work, the wear of the scraper and the cathode plate 2 will undoubtedly increase, thereby reducing the service life of the equipment.

[0027] In order to reduce the wear rate of the scraper and the cathode plate 2, in this embodiment, as shown in FIG. Figure 2-Figure 7As 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 be adaptively adjusted according to the nature of the dirt. Further, 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, thereby scraping off some dirt with low adhesion. When dealing with stubborn dirt, such as inorganic salt crystal dirt, it is necessary to increase the applied pressure of the scraper assembly 502. According to the resistance encountered by the scraper assembly 502, the scraper assembly 502 is lowered, 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 peeling strength.

[0028] Specifically, in this embodiment, the scraper assembly 502 is configured to include a scraper body 521 and a connecting member 522, wherein the scraper body 521 is horizontally arranged on one side of the rotating shaft 501, the bottom surface of the scraper body 521 is configured as a scraping surface, the scraper body 521 is above the cathode plate 2, and the scraper body 521 and the rotating shaft 501 are arranged perpendicular to each other, and the scraper body 521 is movably connected to the rotating shaft 501 through the connecting member 522, and the scraper body 521 can perform circular motion and longitudinal motion through the connecting member 522. In addition, By setting the elastic group 9, the scraper body 521 has elastic support in both the circumferential and longitudinal movements. When the scraper body 521 moves on the surface of the cathode plate 2 as the rotating shaft 501 rotates, the scraper body 521 will come into contact with the dirt and be hindered by the dirt. Then, the scraper body 521 will be compressed by the elastic group 9 due to the resistance. The initial pre-compression amount of the elastic group 9 corresponds to the maximum gap to be avoided between the scraping surface of the scraper body 521 and the cathode plate 2. When the resistance increases, the compression amount of the elastic group 9 increases, driving the scraper body 521 to descend and narrow the gap.

[0029] Furthermore, a accommodating chamber 7 is opened inside the rotating shaft 501, and the accommodating chamber 7 is set as a hole opened along the axial direction of the rotating shaft 501 and concentric with the rotating shaft 501, and the connecting piece 522 is set inside the accommodating chamber 7. The number of accommodating chambers 7 corresponds to the number of cathode plates 2. In other words, the connecting piece 522 of each scraper body 521 corresponds to one accommodating chamber 7, and a clearance groove 8 is opened on the outer wall of the accommodating chamber 7. One end of the scraper body 521 is inserted into the accommodating chamber 7 through the clearance groove 8 and connected to the connecting piece 522.

[0030] The elastic group 9 includes a torsion spring 901 and a spring 902 , wherein the torsion spring 901 is used to elastically support the circumferential rotation of the scraper body 521 , and the spring 902 is used to elastically support the longitudinal movement of the scraper body 521 .

[0031] More specifically, Figure 4 、 Figure 6 、 Figure 7 、 Figure 8 and 9 As shown, the connecting member 522 includes a fixed shaft 5221, a connecting shaft 5222, a control shaft 5223 and a control portion 5224, wherein the fixed shaft 5221 is fixedly arranged at the bottom of the accommodating chamber 7, the fixed shaft 5221 is fixedly connected to the bottom wall of the accommodating chamber 7 and is concentrically arranged with the rotating shaft 501, and a connecting shaft 5222 is rotatably arranged above the fixed shaft 5221, a central shaft is fixedly arranged at the bottom of the connecting shaft 5222, and the bottom end of the central shaft is rotatably connected to the fixed shaft 5221, and the connecting shaft 5222 is also rotatably arranged inside the accommodating chamber 7 through the rotating connection mechanism 13. It should be noted that the connecting shaft 5222 can only rotate circumferentially inside the accommodating chamber 7 and cannot move longitudinally; The connecting shaft 5222 and the fixed shaft 5221 are elastically connected on their facing sides 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, and the outer wall of the control shaft 5223 is in contact with and slidably fits the inner wall of the accommodating cavity 7. In addition, the control shaft 5223 and the connecting shaft 5222 are limited in the circumferential direction by the plug-in fit of the limiting block 10 and the limiting groove 14, so that the control shaft 5223 and the connecting shaft 5222 rotate synchronously. like Figure 9 and Figure 10 As shown, a limit block 10 is fixedly provided at the top center of the connecting shaft 5222, and a limit groove 14 is provided at the bottom of the control shaft 5223 to cooperate with the limit block 10, and the cross section of the limit block 10 is set to be polygonal. In this embodiment, it is specifically set to be a quadrilateral. The limit block 10 is slidably inserted into the interior of the limit groove 14, so that the control shaft 5223 and the connecting shaft 5222 can rotate synchronously, and the control shaft 5223 can also move longitudinally above the connecting shaft 5222, as shown in FIG. Figure 4 、 Figure 6 、 Figure 7 、 Figure 8 As shown, one end of the scraper body 521 located inside the accommodating chamber 7 is fixedly connected to the outer wall of the control shaft 5223, and a control unit 5224 is also provided above the control shaft 5223. When the scraper body 521 is deflected, the control shaft 5223 is rotated, and the control unit 5224 controls the control shaft 5223 to move downward, thereby moving the scraper body 521 downward, adjusting the gap between the scraping surface of the scraper body 521 and the surface of the cathode plate 2, and then adjusting the pressure of the scraper body 521.

[0032] 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 to the control shaft 5223, and thereby provide longitudinal elastic support to the scraper body 521. The torsion spring 901 is specifically configured to rebound the connecting shaft 5222 toward the rotation direction of the rotating shaft 501. In other words, the torsion spring 901 rebounds the scraper in the direction of movement when the scraper body 521 rotates toward the rotating shaft 501.

[0033] It should be noted that if Figure 5 As shown, the height and width of the give way 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, and in the initial state, the top surface of the scraper body 521 contacts the top wall of the give way groove 8, thereby limiting the maximum height of the scraper body 521, and the forward surface of the scraper body 521 during the scraping movement is in contact with the corresponding inner wall of the give way groove 8.

[0034] Specifically, such as Figure 6 and Figure 8 As shown, the control part 5224 includes a fixed disk 2241, a protrusion 2242 and a push rod 2243, wherein the fixed disk 2241 is arranged at the top of the accommodating cavity 7, and the top wall of the fixed disk 2241 is fixedly connected to the top wall of the accommodating cavity 7, and the fixed disk 2241 is concentrically arranged with the rotating shaft 501, and a protrusion 2242 is fixedly arranged at the bottom of the fixed disk 2241, and there are at least two protrusions 2242. In this embodiment, there are specifically three protrusions 2242, and the three protrusions 2242 are respectively arranged at positions close to the outer circumferential edge of the lower end surface of the fixed disk 2241, and the three protrusions 2242 are arranged in a ring array with the center of the fixed disk 2241 as the center. The protrusion 2242 is arc-shaped in a top view and is concentrically arranged with the fixed disk 2241. It can be understood that the three The protrusions 2242 form a ring and are arranged concentrically with the fixed disk 2241, and a push rod 2243 is fixedly provided on the top of the control shaft 5223, and the number of the push rods 2243 is the same as the number of the 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, and the distance between the push rod 2243 and the center of the rotating shaft 501 is the same as the distance between the protrusion 2242 and the center of the rotating shaft 501. The top of the push rod 2243 contacts the bottom surface of the fixed disk 2241. When the control shaft 5223 rotates, the protrusion 2242 is on the movement trajectory of the push rod 2243. In other words, when the control shaft 5223 rotates, the push rod 2243 rotates accordingly, and the push rod 2243 can move from the bottom surface of the fixed disk 2241 to the bottom surface of the protrusion 2242. More specifically, the bottom surface of the protrusion 2242 is set as a slope, and the slope 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 at the same time, and the edge of the slope is smoothly transitioned to the bottom surface of the fixed disk 2241, and the side wall of the protrusion 2242 is a straight surface. The protrusion 2242 is specifically in the shape of a right-angled triangle. In the initial state, the top of the push rod 2243 contacts the bottom surface of the fixed disk 2241. As the control shaft 5223 rotates, the push rod 2243 can be guided by the slope of the protrusion 2242 on the bottom surface of the fixed disk 2241 to make it descend, thereby driving the control shaft 5223 to descend, thereby realizing the downward movement of the scraper body 521.

[0035] It should be noted that the inclined direction of the bottom surface of the protrusion 2242 is set so that when the scraper body 521 moves in the opposite direction of the rotation of the rotating shaft 501, the control shaft 5223 drives the top rod 2243 to move and move downward through the inclined guide at the bottom of the protrusion 2242. In addition, in this embodiment, the top of the top rod 2243 is set to a spherical surface, and the contact surfaces of the top rod 2243 and the protrusion 2242 can be provided with a wear-resistant coating.

[0036] Therefore, through the above arrangement, when scraping dirt, the rotating shaft 501 rotates to rotate the internal fixed shaft 5221, and the fixed shaft 5221 and the connecting shaft 5222 are supported by the torsion spring 901, and the connecting shaft 5222 will rotate synchronously with the rotating shaft 501, so the control shaft 5223 will drive the scraper body 521 to rotate synchronously. When the scraper body 521 comes into contact with the dirt, the scraper body 521 is hindered by the dirt, and the scraper body 521 will move in the direction opposite to the movement direction of the rotating shaft 501. The movement of the scraper body 521 will drive the control shaft 5223 to rotate synchronously, and the control shaft 5223 will drive the connecting shaft 5222 to rotate synchronously and compress the torsion spring 901. Here, the degree of dirt adhesion is proportional to the resistance encountered by the scraper body 521, that is, the greater the dirt adhesion, the greater the resistance encountered by the scraper body 521 when scraping. At this time, the resistance of the dirt will be reflected on the torsion spring 901. In other words, the more difficult the dirt is to peel off, the greater the compression degree of the torsion spring 901 will be. At this time, the control shaft 5223 will drive the connecting shaft 5222 to rotate synchronously and compress the torsion spring 901. The greater the angle of rotation of 5223, the greater the distance of downward movement of the push rod 2243 will be, and thus the scraper body 521 will be driven downward to adjust the gap between the scraper body 521 and the surface of the cathode plate 2, thereby improving the scraping effect. The pressure applied by the plate body 521 increases the dirt peeling strength, so that the gap between the scraper body 521 and the surface of the cathode plate 2 can be adaptively adjusted according to the adhesion of the dirt. Only when dealing with stubborn dirt, the scraper body 521 will move down to reduce the gap with the surface of the cathode plate 2. When dealing with dirt with less adhesion, the scraper body 521 maintains a slightly larger gap with the surface of the cathode plate 2. Therefore, the relatively fixed gap can significantly reduce the degree of wear between the scraper body 521 and the cathode plate 2, thereby increasing the service life.

[0037] In addition, in this embodiment, Figure 4 、 Figure 6 、 Figure 8 、 Figure 9 and Figure 11As shown, the rotating connection mechanism 13 is set to a one-way connection, so that the rotation connection between the connecting shaft 5222 and the accommodating chamber 7 is a one-way rotation. Specifically, it is set so that when the scraper body 521 encounters resistance, the connecting shaft 5222 cannot be reset after rotation, so that the connecting shaft 5222 is limited after rotation, and accordingly, the height of the downward movement through the control part 5224 will also be limited, so that the scraper body 521 can maintain a fixed gap after the gap changes, ensuring that the scraper remains stable during the cleaning process, avoiding the cleaning effect affected by the gap change, and at the same time reducing the mechanical wear caused by frequent adjustments, and avoiding fatigue damage to the spring support system caused by repeated changes in the gap.

[0038] In addition, in the present embodiment, the rotating connection mechanism 13 is further configured so that after each rotation of the rotating shaft 501 at least two circles and the scraper body 521 subsequently 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 the present embodiment, it is specifically configured that after the rotating shaft 501 rotates two circles and the scraper body 521 scrapes the cathode plate 2 twice, the one-way lock of the connecting shaft 5222 by the rotating connection mechanism 13 can be unlocked, so that the connecting shaft 5222 rebounds and rotates under the action of the torsion spring 901 to reset, thereby resetting the height of the control shaft 5223 and restoring the gap of the scraper body 521 to its initial state.

[0039] Specifically, such as Figure 4 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 and Figure 11As shown, an annular groove 11 is provided on the outer wall of the connecting shaft 5222, and the interior of the annular groove 11 is used to install a rotating connection mechanism 13, which includes an outer ring 131, an inner ring 132, a one-way tooth groove 133 and a clamping block 134, wherein the outer ring 131 is arranged inside the annular groove 11, and the outer circumferential outer wall of the outer ring 131 is fixedly connected to the inner wall of the accommodating cavity 7, and the inner ring 132 is arranged on the inner ring of the outer ring 131, the inner ring 132 is located inside the annular groove 11 and fixedly sleeved on the outer wall of the connecting shaft 5222, and the inner ring 132 is concentrically arranged with the outer ring 131 and concentrically arranged with the connecting shaft 5222, and the inner ring 132 is provided with a one-way tooth groove 133 on the inner wall of the inner ring of the outer ring 131, and a plurality of one-way tooth grooves 133 are provided, and the plurality of one-way tooth grooves 133 are centered with the center of the outer ring 131. A core ring array is arranged, the inner wall of one side of the one-way tooth groove 133 is a straight wall, and the inner wall of the other side is a slope. In addition, a block 134 is movably inserted into the outer wall of the inner ring 132, and the block 134 is elastically supported by the elastic member 17, and the block 134 is inserted into the inside of the one-way tooth groove 133, through the elastically supported block 134 and the setting of the one-way tooth groove 133, thereby realizing the one-way rotation of the connecting shaft 5222, so that when the scraper body 521 is subjected to resistance, the connecting shaft 5222 rotates, and the block 134 on the connecting shaft 5222 can be retracted by the slope guide of the one-way tooth groove 133, and on the contrary, through the straight wall on the other side of the one-way tooth groove 133, the block 134 cannot be retracted, thereby locking the connecting shaft 5222 in one direction.

[0040] In order to unlock the one-way locking of the rotating connecting mechanism 13, as shown in FIG. Figure 11 As shown, a sliding groove 15 is provided inside the inner ring 132 and close to the outer wall of the outer circumference. A slider 16 is slidably provided inside the sliding groove 15. A clamping block 134 is fixedly provided at one end of the slider 16 facing the outer wall of the outer circumference of the inner ring 132. One end of the clamping block 134 passes through the outer wall of the sliding groove 15 and extends to the outside of the inner ring 132 to be inserted into the one-way tooth groove 133. An elastic member 17 is provided at the other end of the clamping block 134 for elastic support, so that the clamping block 134 is slidably inserted and supported by the elastic member 17. 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 movably passes through the outer wall of the accommodating cavity 7 and extends to the outside of the rotating shaft 501 .

[0041] like Figure 3 and Figure 12 As shown, a reset mechanism 18 is further provided. The reset mechanism 18 is used to unlock the one-way locking of the connecting shaft 5222 by the rotating connecting mechanism 13 at a timing on the rotating shaft 501. It should be noted that the timing is controlled so that the rotating shaft 501 completes at least two rotations to unlock the rotating connecting mechanism 13, thereby resetting the scraper body 521. 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 circumstances, the control ring 181 is located below the connecting rod 19. When it is necessary to restore the initial gap of the scraper body 521, the control ring 181 is controlled to rise. 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 so that the end of the connecting rod 19 located outside the rotating shaft 501 is squeezed toward the inside of the rotating shaft 501, thereby causing it to shrink. When the connecting rod 19 shrinks, it drives the slider 16 to move, so that the slider 16 moves and drives the block 134 to shrink into the inside of the slide groove 15. After the limit of the block 134 is lost, the connecting shaft 5222 can be reset and rotated by the action of the torsion spring 901, thereby restoring the initial gap of the scraper body 521. After the connecting shaft 5222 is reset, the control ring 181 descends and resets.

[0042] 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 of the outside of the reaction tank 1, and the longitudinal movement of the fixed rod 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 ring 181 to perform a reciprocating motion. The electric push rod 183 causes the control ring 181 to rise, thereby releasing the one-way lock 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 restore the initial gap. When scraping again, the scraper body 521 can adaptively adjust the height again according to the resistance encountered.

[0043] It should be noted that a connecting sleeve 20 is fixedly sleeved on the bottom of the rotating shaft 501, and the connecting sleeve 20 is rotatably connected to the bottom of the reaction tank 1. The fixed rod 182 passes through the connecting sleeve 20 and extends to the bottom of the reaction tank 1. The chassis 12 is fixedly connected to one end of the fixed rod 182 located outside the reaction tank 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 fixed rod 182 from driving the electric push rod 183 to rotate.

[0044] The principle of the present invention is as follows: when scraping dirt, the present invention rotates the shaft 501 through the driving member 503, and the rotation of the shaft 501 causes the internal connecting shaft 5222 to rotate synchronously, and the control shaft 5223 rotates synchronously and drives the scraper body 521 to rotate synchronously. When the scraper body 521 comes into contact with the dirt, the scraper body 521 is hindered by the dirt, and the scraper body 521 moves in the direction opposite to the movement direction of the shaft 501. The movement of the scraper body 521 drives the control shaft 5223 to rotate. The control shaft 5223 drives the connecting shaft 5222 to rotate synchronously and compress the torsion spring 901. Through the setting 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 movement stroke of the push rod 2243 on the inclined surface at the bottom of the protrusion 2242. Through the setting of the inclined surface, the downward movement of the push rod 2243 is progressive. The greater the rotation angle of the control shaft 5223, the greater the downward movement distance, thereby driving the scraper body 521 to move downward. , adjust the gap between the scraper body 521 and the surface of the cathode plate 2, increase the pressure applied by the scraper body 521, and improve the dirt peeling strength, so that the gap between the scraper body 521 and the surface of the cathode plate 2 can be adaptively adjusted according to the adhesion of the dirt, and by making the electric push rod 183 start at a time, so that after the scraper body 521 scrapes the cathode plate 2 for a fixed number of times, the electric push rod 183 starts to make the control ring 181 rise through the fixed rod 182, and the upper section of the inner ring of the control ring 181 is moved upward. The inclined surface guides the connecting rod 19 so that one end outside the rotating shaft 501 is retracted toward the inside of the rotating shaft 501, thereby causing the slider 16 to move and drive the block 134 to retract into the inside of the slide groove 15. After losing the limit of the block 134, the connecting shaft 5222 can be reset and rotated through the action of the torsion spring 901, thereby causing the scraper body 521 to automatically restore the initial gap. Each time the dirt is scraped, the scraper body 521 completes the gap adjustment according to the nature of the dirt, and automatically restores the initial gap after scraping for a fixed time.

[0045] 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 embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An electrochemical redox reactor for sewage treatment, comprising a reaction tank (1) and a cathode plate (2) installed inside the reaction tank (1), wherein at least two groups of cathode plates (2) are arranged inside the reaction tank (1), and the cathode plates (2) are arranged equidistantly in the longitudinal direction of the height of the reaction tank (1), characterized in that: A scraper mechanism (5) is provided in the reaction tank (1); The scraper mechanism (5) comprises a rotating shaft (501), a scraper assembly (502) and a driving member (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 wall and bottom wall of the reaction tank (1), respectively; the top end of the rotating shaft (501) extends to above the top of the reaction tank (1) and is driven by the driving member (503); and the rotating shaft (501) moves through the cathode plate (2); a scraper assembly (502) is provided on the surface of each cathode plate (2), and one end of the scraper assembly (502) is connected to the rotating shaft (501); The scraper assembly (502) comprises a scraper body (521) and a connecting piece (522). The scraper body (521) is movably mounted on the rotating shaft (501) via the connecting piece (522). The scraping surface of the scraper body (521) forms an adjustable gap with the surface of the cathode plate (2).

2. An electrochemical redox reactor for sewage treatment according to claim 1, characterized in that: The connecting member (522) drives the scraper body (521) to longitudinally displace according to the resistance experienced by the scraper body (521), thereby dynamically adjusting the gap between the scraping surface of the scraper body (521) and the surface of the cathode plate (2).

3. An electrochemical redox reactor for sewage treatment according to claim 2, characterized in that: The connecting member (522) comprises a fixed shaft (5221), a connecting shaft (5222), a limit block (10), a control shaft (5223) and a control portion (5224). An accommodating chamber (7) is provided inside the rotating shaft (501) for installing the connecting member (522). The fixed shaft (5221) is fixedly arranged at the bottom of the accommodating chamber (7). A connecting shaft (5222) is provided above the fixed shaft (5221). The connecting shaft (5222) is rotatably arranged inside the accommodating chamber (7) via a rotating connecting mechanism (13). The facing surfaces of the connecting shaft (5222) and the fixed shaft (5221) are elastically connected via a torsion spring (901). A control shaft (5223) is provided above the connecting shaft (5222). 23), the outer wall of the control shaft (5223) is slidably engaged with the inner wall of the accommodating cavity (7), and the control shaft (5223) and the connecting shaft (5222) are limited in the circumferential direction by the plug-in engagement of the limit block (10) and the limit groove (14), one end of the scraper body (521) located inside the accommodating cavity (7) is fixedly connected to the outer wall of the control shaft (5223), and a control portion (5224) is further provided above the control shaft (5223), and the control portion (5224) drives and controls the longitudinal displacement of the control shaft (5223) by rotating the control shaft (5223), and a spring (902) is provided between the control shaft (5223) and the connecting shaft (5222) for longitudinally supporting the control shaft (5223).

4. An electrochemical redox reactor for sewage treatment according to claim 3, characterized in that: A limit block (10) is fixedly provided on the top of the connecting shaft (5222), a limit slot (14) is provided on the bottom of the control shaft (5223), and the cross section of the limit block (10) is set to a polygon, and the limit block (10) is slidably inserted into the limit slot (14).

5. An electrochemical redox reactor for sewage treatment according to claim 4, characterized in that: The control part (5224) includes a fixed disk (2241), a protrusion (2242) and a push rod (2243), wherein the fixed disk (2241) is fixedly arranged on the top of the accommodating cavity (7), and a protrusion (2242) is fixedly arranged on the bottom of the fixed disk (2241), and at least two protrusions (2242) are provided and 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, and the control shaft A push rod (2243) is fixedly provided on the top of (5223), and the number of the push rods (2243) is the same as the number of the protrusions (2242) and is arranged in a circular array with the center of the control shaft (5223) as the center. When the control shaft (5223) rotates, the protrusion (2242) is on the movement trajectory of the push rod (2243) and the control shaft (5223) is longitudinally displaced through the contact between the push rod (2243) and the protrusion (2242).

6. An electrochemical redox reactor for sewage treatment according to claim 5, characterized in that: The outer wall of the accommodating cavity (7) is provided with a clearance groove (8) for making way for the scraper body (521).

7. An electrochemical redox reactor for sewage treatment according to claim 6, characterized in that: The connecting shaft (5222) is arranged inside the accommodating chamber (7) to rotate in one direction via a rotating connecting mechanism (13). The rotating connecting mechanism (13) realizes the one-way rotation of the connecting shaft (5222) through the cooperation of one-way teeth. A reset mechanism (18) is also provided on the rotating shaft (501). The reset mechanism (18) is used to periodically release the one-way locking of the connecting shaft (5222) by the rotating connecting mechanism (13).

8. An electrochemical redox reactor for sewage treatment according to claim 7, characterized in that: The rotating connection mechanism (13) comprises an outer ring (131), an inner ring (132), a one-way tooth groove (133) and a clamping block (134). The outer ring (131) is arranged inside the annular groove (11) and fixedly connected to the inner wall of the accommodating 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 tooth groove (133), and a plurality of one-way tooth grooves (133) are provided. The outer wall of the inner ring (132) is movably plugged with a clamping block (134), and the clamping block (134) is elastically supported by an elastic member (17). The clamping block (134) is connected to a connecting rod (19), and the other end of the connecting rod (19) movably passes through the outer wall of the accommodating cavity (7) and extends to the outside of the rotating shaft (501).

9. An electrochemical redox reactor for sewage treatment according to claim 8, 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 an inclined surface. The control ring (181) is used to squeeze the connecting rod (19) and shrink toward the inside of the rotating shaft (501) through the contact between the upper section of the inner ring and the connecting rod (19) when the control ring (181) moves upward. The movement of the connecting rod (19) synchronously drives the block (134) to shrink. 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 tank (1). The longitudinal movement of the fixed rod (182) is controlled by the electric push rod (183).

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