Electrocatalytic oxidation device for efficient treatment of low-substrate wastewater

Abstract

The application relates to the field of wastewater treatment, in particular to an electro-catalytic oxidation device for efficient treatment of low-substrate wastewater, which comprises a wastewater treatment bin, a water inlet and a water outlet are formed in the wastewater treatment bin; the internal space of the wastewater treatment bin comprises an electro-catalytic oxidation area and a mixing diffusion area; the electro-catalytic oxidation area and the mixing diffusion area are communicated; an electrode module is arranged in the electro-catalytic oxidation area; the electrode module comprises a plurality of electrode plates arranged in parallel, the electrode plates comprise a plurality of cathode plates and a plurality of anode plates; the cathode plates and the anode plates are fixedly connected with the wastewater treatment bin; channels are formed between adjacent cathode plates and anode plates; the channels are arranged towards the mixing diffusion area; a flow guide wheel is rotatably arranged in the mixing diffusion area; the flow guide wheel is connected with a power source to realize self-rotation and agitate the wastewater in the mixing diffusion area. The electro-catalytic oxidation device has a high upper limit of electro-catalytic oxidation efficiency and can effectively increase the wastewater treatment capacity.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment, and in particular to an electrocatalytic oxidation device for the efficient treatment of low-matrix wastewater. Background Technology

[0002] Electrocatalytic oxidation is an advanced oxidation technology that uses an electrode with catalytic properties as the anode to generate highly oxidizing hydroxyl radicals that degrade organic pollutants in wastewater, breaking them down into harmless H2O and CO. 2 Green technologies, because they do not produce secondary pollution, are now widely used in the industrial wastewater treatment industry.

[0003] Common electrocatalytic oxidation wastewater treatment processes mainly include a pretreatment stage, an electrocatalytic oxidation reaction, and post-treatment and separation. The pretreatment stage primarily involves adjusting the pH value to improve the efficiency of subsequent electrochemical reactions, while adding electrolytes to enhance the conductivity of the solution. The electrocatalytic oxidation reaction, including direct and indirect oxidation processes, requires adjusting key parameters such as voltage, current density, and reaction time based on pollutant concentrations. Post-treatment and separation typically employ methods such as flocculation sedimentation or flotation to remove precipitates generated during the reaction.

[0004] Among these operating parameters, current density is one of the key factors affecting the efficiency of electrocatalytic oxidation. Current density refers to the amount of current passing through a unit area and has a direct impact on the removal rate of pollutants. Generally, appropriately increasing the current density helps to improve the removal efficiency, thereby improving the overall treatment effect. However, if the current density is too high, it may lead to an imbalance in the redox reaction on the electrode surface, which will reduce the pollutant removal rate and electrocatalytic efficiency, and increase operating costs.

[0005] To address this issue, the invention patent with publication number CN119660895A specifically discloses an internal circulation rotary impact flow electrocatalytic device for treating organic wastewater. It forms an internal circulation impact flow in the swirling zone by coaxially reversing the inner and outer propeller blades, solving the problem of bubble adhesion on the electrode surface. Furthermore, the impact generates strong turbulence, reducing the reaction dead zone and enhancing mass transfer within the electrochemical degradation device, thereby achieving automated operation and efficient degradation.

[0006] However, the above-mentioned solutions have a limited number of electrode plates, resulting in a low upper limit for electrocatalytic oxidation efficiency, generally suitable for treating small amounts of wastewater. They are unsuitable for treating large volumes of wastewater. Furthermore, the internal and external propeller blade structure limits the increase in the number of electrode plates; if the number of electrode plates is too large, effective swirling flow is difficult to achieve with only two counter-rotating propeller blades. In summary, the existing technologies described above have a low upper limit for electrocatalytic oxidation efficiency, making them unsuitable for treating large volumes of wastewater. Summary of the Invention

[0007] This application provides an electrocatalytic oxidation device for the efficient treatment of low-matrix wastewater, which has a high upper limit of electrocatalytic oxidation efficiency and can effectively increase the wastewater treatment capacity. The technical solution adopted is as follows: An electrocatalytic oxidation device for efficient treatment of low-matrix wastewater includes: The wastewater treatment chamber is equipped with an inlet and an outlet; the internal space of the wastewater treatment chamber includes an electrocatalytic oxidation zone and a mixing and diffusion zone; the electrocatalytic oxidation zone and the mixing and diffusion zone are connected. An electrode module is located within the electrocatalytic oxidation zone. The electrode module includes multiple electrode plates arranged in parallel, each electrode plate comprising multiple cathode plates and multiple anode plates, which are alternately distributed. Both the cathode plates and anode plates are fixedly connected to the wastewater treatment chamber. A channel is formed between adjacent cathode plates and anode plates, and the channel is oriented towards the mixing and diffusion zone. A guide wheel is rotatably positioned within the mixing and diffusion zone; the guide wheel is connected to a power source to achieve autonomous rotation and agitate the wastewater in the mixing and diffusion zone.

[0008] By adopting the above technical solution, wastewater enters the wastewater treatment chamber through the inlet and fills the entire internal space of the chamber. The electrode module electrocatalytically oxidizes the organic matter in the wastewater, converting it into water and carbon dioxide. As the electrocatalytic oxidation proceeds, the organic matter content inside the electrode module gradually decreases, while the organic matter content in the wastewater in the mixing and diffusion zone is relatively high. To ensure that the organic matter content inside the electrode module remains stable, thereby guaranteeing the electrocatalytic oxidation rate, the guide wheel rotates to agitate the wastewater in the mixing and diffusion zone, increasing the diffusion rate of organic matter. This allows the organic matter in the mixing and diffusion zone to quickly diffuse into the electrocatalytic oxidation zone, enhancing mass transfer and further improving the electrocatalytic oxidation efficiency. Furthermore, since this application uses a combination of multiple anode and cathode plates, the number of anode and cathode plates is unlimited, effectively increasing the wastewater treatment capacity and making it particularly suitable for treating low-matrix wastewater.

[0009] Preferably, there are two electrocatalytic oxidation zones, and the mixing and diffusion zone is located between the two electrocatalytic oxidation zones; there are also two sets of electrode modules, which are located in different electrocatalytic oxidation zones; the guide wheel is located between the two sets of electrode modules.

[0010] By adopting the above technical solution, setting up two electrocatalytic oxidation zones and two sets of electrode modules can increase the number of electrode plates and improve the electrocatalytic oxidation efficiency to adapt to large-scale wastewater treatment. Placing the mixing and diffusion zone between the two electrocatalytic oxidation zones and the guide wheel between the two sets of electrode modules allows the wastewater to be fully mixed and diffused in the mixing and diffusion zone after electrolysis in the two electrocatalytic oxidation zones, further improving the wastewater treatment effect.

[0011] Preferably, the two sets of electrode modules and one flow guide wheel constitute an electrocatalytic oxidation unit, and multiple electrocatalytic oxidation units are arranged in parallel in the wastewater treatment chamber.

[0012] By adopting the above technical solution, multiple electrocatalytic oxidation units consisting of two sets of electrode modules and a guide wheel are set up in parallel in the wastewater treatment chamber. This can increase the number of electrode plates and channels, improve the overall electrocatalytic oxidation efficiency, and is suitable for the treatment of large amounts of low-matrix wastewater. In addition, the guide wheel can agitate the wastewater in the mixing and diffusion zone, promote the mixing and diffusion of wastewater, and further improve the treatment effect.

[0013] Preferably, the electrode modules in two adjacent electrocatalytic oxidation units are spaced apart; the guide wheels in two adjacent electrocatalytic oxidation units rotate in opposite directions.

[0014] By adopting the above technical solution, multiple electrocatalytic oxidation units are arranged in parallel in the wastewater treatment chamber. The electrode modules in two adjacent electrocatalytic oxidation units are spaced apart and the guide wheels rotate in opposite directions, which creates a complex water flow in the mixing and diffusion zone, promotes the diffusion of organic matter in the wastewater, improves the electrocatalytic oxidation efficiency, and thus enhances the treatment effect on low-matrix wastewater.

[0015] Preferably, the wastewater treatment chamber has a bottom and a top, and the two electrocatalytic oxidation zones are respectively located at the bottom and top of the wastewater treatment chamber; the inlet is located at the bottom of the wastewater treatment chamber, and the outlet is located at the top of the wastewater treatment chamber. The electrode module located at the bottom of the wastewater treatment chamber has both arc-shaped cathode and anode plates; the electrode module located at the top of the wastewater treatment chamber has both straight cathode and anode plates.

[0016] By adopting the above technical solution, since organic matter is more easily diffused downwards under the influence of gravity, the arc-shaped plate arrangement helps to increase the reaction area. The straight plate arrangement, on the other hand, helps to reduce resistance, thus facilitating the diffusion of organic matter. This layout makes full use of the space in the wastewater treatment chamber, combining the characteristics of the arc-shaped and straight plate electrodes to achieve efficient and continuous wastewater treatment.

[0017] Preferably, the wastewater treatment chamber has a first template and a second template, which are respectively located on opposite sides of the wastewater treatment chamber and serve as two side walls of the wastewater treatment chamber. One electrocatalytic oxidation zone is located at the first template, and the other electrocatalytic oxidation zone is located at the second template; the cathode plate and the anode plate are both arranged along the direction from the first template to the second template; one set of electrode modules is set close to the first template, and the cathode plate and the anode plate in the electrode module abut against the sidewall of the first template; another set of electrode modules is set close to the second template, and the cathode plate and the anode plate in the electrode module abut against the sidewall of the second template.

[0018] By adopting the above technical solution, the two electrocatalytic oxidation zones are located on both sides of the mixing diffusion zone, which enables the organic matter in the mixing diffusion zone to diffuse in both directions. On the one hand, this ensures the diffusion efficiency of the organic matter, and on the other hand, it can effectively increase the number of electrode modules, thereby improving the wastewater treatment efficiency.

[0019] Preferably, both the first template and the second template have multiple buffer slots arranged in parallel; two adjacent channels on the electrode module are connected to the same buffer slot, and these two adjacent channels are connected through the buffer slot.

[0020] By adopting the above technical solution, multiple parallel buffer tanks are opened on the first and second templates, and adjacent channels of the electrode module are connected to the same buffer tank. This allows wastewater to enter the buffer tank after flowing through the channels, balancing the water pressure and uniformizing the water flow velocity. Furthermore, under the action of the buffer tanks on the first and second templates, the wastewater inside the electrolysis module will flow back and forth, accelerating turbulence and reducing the concentration gradient of organic matter, thereby ensuring the efficiency of electrocatalytic oxidation.

[0021] Preferably, the electrode module has a concave groove-shaped area on the side facing the guide wheel.

[0022] By adopting the above technical solution, the guide wheel in the mixing and diffusion zone rotates autonomously to agitate the wastewater and promote mixing; the electrode module is provided with a concave groove-shaped area on the side facing the guide wheel, which facilitates the diffusion of organic matter into the electrode module and enhances the mass transfer effect.

[0023] Preferably, a first through hole and a second through hole are provided on the side wall of the wastewater treatment chamber; a first electrical contact plate and a second electrical contact plate are provided on the outside of the wastewater treatment chamber; The cathode plate is provided with a first conductive connector, which passes through a first through hole and is electrically connected to the first electrode plate. A second conductive connector is provided on the anode plate. The second conductive connector passes through the second through hole and is electrically connected to the second junction plate.

[0024] By adopting the above technical solution, a first through hole and a second through hole are opened on the side wall of the wastewater treatment chamber, and a first electrical contact plate and a second electrical contact plate are set on the outside. The cathode plate is provided with a first conductive connector that passes through the first through hole and is electrically connected to the first electrical contact plate, and the anode plate is provided with a second conductive connector that passes through the second through hole and is electrically connected to the second electrical contact plate. This can realize the effective electrical connection between the cathode plate and the anode plate and the external power supply, ensure the normal operation of the electrode module, and thus ensure that the device can perform electrocatalytic oxidation treatment of low matrix wastewater.

[0025] Preferably, an installation groove is provided on the outer wall of the wastewater treatment chamber, and a cover plate is provided at the opening of the installation groove. The cover plate is detachably connected to the wastewater treatment chamber. The first and second electrical contact plates are both located inside the installation groove. A sealing element is provided in both the first and second through holes.

[0026] By adopting the above technical solution, the installation slot can protect the first and second electrical contact plates. The detachable cover facilitates the inspection and maintenance of the first and second electrical contact plates. The sealing elements in the first and second through holes can prevent wastewater leakage and ensure the sealing and safety of the device. Combined with the wastewater treatment chamber, an inlet and an outlet are set up. The interior is equipped with an electrocatalytic oxidation zone and a mixing diffusion zone. The electrocatalytic oxidation zone is equipped with an electrode module containing multiple alternating cathode plates and anode plates forming a channel. The mixing diffusion zone is equipped with a self-rotating guide wheel and other structures to achieve efficient treatment of low-matrix wastewater.

[0027] In summary, the present invention has at least one of the following beneficial technical effects: 1. The electrode module electrocatalytically oxidizes organic matter in wastewater, converting it into water and carbon dioxide. The rotating guide wheel agitates the wastewater within the mixing and diffusion zone, increasing the diffusion rate of organic matter. This allows the organic matter in the mixing and diffusion zone to rapidly diffuse into the electrocatalytic oxidation zone, enhancing mass transfer and further improving the electrocatalytic oxidation efficiency. Furthermore, since this application employs a combination of multiple anode and cathode plates, the number of anode and cathode plates is unlimited, effectively increasing wastewater treatment capacity and making it particularly suitable for treating low-matrix wastewater. 2. Each electrocatalytic oxidation unit contains two electrode modules. In addition, the wastewater treatment chamber in this application can accommodate multiple electrocatalytic oxidation units, thereby effectively increasing the number of anode and cathode plates, increasing the electrocatalytic oxidation reaction area, and improving wastewater treatment efficiency. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the electrocatalytic oxidation device in the embodiments of this application, viewed from above. Figure 2 This is a schematic diagram of the overall structure of the electrocatalytic oxidation device in the embodiments of this application, viewed from below. Figure 3 This is an exploded structural diagram of the electrocatalytic oxidation device in the embodiments of this application from a top view, and is mainly used to show the connection relationship of the cathode plate, the first conductive connector, and the first electrode plate; Figure 4 This is an exploded structural diagram of the electrocatalytic oxidation device in the embodiments of this application from a top view, and is mainly used to show the connection relationship of the anode plate, the second conductive connector, and the second electrode plate; Figure 5 This is a schematic diagram of the electrocatalytic oxidation unit in the embodiments of this application.

[0029] The attached diagram is labeled as follows: 1. Wastewater treatment chamber; 11. Main body; 111. First through hole; 112. Second through hole; 113. Mounting groove; 12. First template; 13. Second template; 14. Inlet; 15. Outlet; 16. Vent; 17. Buffer groove; 18. Groove edge; 19. Cover plate; 2. Electrode module; 21. Cathode plate; 22. Anode plate; 23. First conductive connector; 24. Second conductive connector; 3. Guide wheel; 31. Central rotating shaft; 32. Blade; 4. First electrode plate; 5. Second electrode plate. Detailed Implementation

[0030] The following will be combined with the appendix Figures 1 to 5 The technical solutions in the embodiments of the present invention are further described in detail below. The described embodiments are only possible technical implementations of the present invention, but are not limited thereto. Those skilled in the art can certainly combine the embodiments of the present invention to obtain other embodiments without creative effort, which are also within the protection scope of the present invention.

[0031] Reference Figures 1 to 3 The electrocatalytic oxidation device for efficient treatment of low-matrix wastewater provided in this application includes a wastewater treatment chamber 1, an electrode module 2, and a guide wheel 3. The wastewater treatment chamber 1 has an inlet 14 and an outlet 15. An electrocatalytic oxidation zone and a mixing diffusion zone are connected inside the wastewater treatment chamber 1. The electrode module 2 is located in the electrocatalytic oxidation zone, and the guide wheel 3 is rotatably positioned in the mixing diffusion zone. Wastewater enters the wastewater treatment chamber 1 through the inlet 14 and fills the entire internal space of the wastewater treatment chamber 1. Simultaneously, the wastewater enters the electrode module 2, where it electrocatalytically oxidizes the organic matter in the wastewater, converting it into water and carbon dioxide. As the electrocatalytic oxidation proceeds, the organic matter content inside the electrode module 2 gradually decreases, while the organic matter content in the wastewater in the mixing diffusion zone is relatively high. To ensure a stable organic matter content inside the electrode module 2 and thus maintain the electrocatalytic oxidation rate, the guide wheel 3 rotates, agitating the wastewater in the mixing diffusion zone and increasing the diffusion rate of organic matter, thereby allowing the organic matter in the mixing diffusion zone to rapidly diffuse into the electrocatalytic oxidation zone.

[0032] Reference Figure 3 and Figure 4 Specifically, the wastewater treatment chamber 1 includes a main body 11, a first template 12, and a second template 13. The main body 11 is a square frame with four side walls. The top and bottom of the main body 11 are continuous. The first template 12 is located at the top of the main body 11, and the second template 13 is located at the bottom of the main body 11. Both the first template 12 and the second template 13 can be fixedly connected to the main body 11 with bolts. Regardless of the connection method, it is sufficient to achieve a stable connection between the first template 12, the second template 13, and the main body 11, while ensuring that the first template 12 and the second template 13 are detachable to facilitate maintenance of the internal structure of the wastewater treatment chamber 1.

[0033] In this embodiment, the inlet 14 is located on the second template 13, and the outlet 15 is located on the first template 12. Wastewater enters from the bottom of the wastewater treatment chamber 1, is treated, and then discharged from the top of the wastewater treatment chamber 1. As one specific implementation of this embodiment, the outlet 15 and the inlet 14 can also be located on the side wall of the main body 11, as long as the requirements for water inlet and outlet are met.

[0034] Reference Figure 5 Inside the wastewater treatment chamber 1, there are two electrocatalytic oxidation zones and one mixing diffusion zone, distributed from bottom to top as follows: electrocatalytic oxidation zone, mixing diffusion zone, and electrocatalytic oxidation zone, with the mixing diffusion zone located between the two electrocatalytic oxidation zones. Each electrocatalytic oxidation zone contains a set of electrode modules 2. This forms a structure consisting of two electrode modules 2 and a guide wheel 3, with the guide wheel 3 positioned between the two electrode modules 2.

[0035] Two electrode modules 2 are provided, one located at the top of the wastewater treatment chamber 1 and the other at the bottom of the wastewater treatment chamber 1. The top of the electrode module 2 located at the top of the wastewater treatment chamber 1 abuts against the first template 12, while the bottom of the electrode module 2 located at the bottom of the wastewater treatment chamber 1 abuts against the second template 13.

[0036] Each electrode module 2 includes multiple cathode plates 21 and multiple anode plates 22, which are alternately distributed with gaps between them, thereby forming channels between adjacent cathode plates 21 and anode plates 22, in which wastewater fills. Each anode plate 22 and cathode plate 21 is arranged vertically, thereby forming a vertical channel to facilitate the rapid diffusion of organic matter into the channel through a mixing and diffusion zone.

[0037] Reference Figure 5Multiple buffer grooves 17 are formed on the sidewalls of the first template 12 and the second template 13 facing the electrode module 2. Specifically, the buffer grooves 17 on the first template 12 are arranged in parallel, with groove edges 18 between each pair of buffer grooves 17; that is, the multiple buffer grooves 17 and multiple groove edges 18 are alternately distributed on the first template 12. The electrode module 2, which abuts against the first template 12, has multiple anode plates 22 corresponding one-to-one with multiple groove edges 18, with the upper end of the anode plate 22 abutting against the groove edge 18, and the upper end of the anode plate 22 facing the middle of the buffer groove 17. Thus, the tops of two adjacent channels are connected through the connecting buffer groove 17.

[0038] Reference Figure 5 Similarly, for the second template 13, multiple buffer grooves 17 and multiple groove edges 18 are also alternately distributed, and the electrode module 2 that abuts against the second template 13 has its lower end of the cathode plate 21 abutting against the groove edge 18, while the lower end of the anode plate 22 faces the middle of the buffer groove 17.

[0039] Since the guide wheel 3 will inevitably disturb the wastewater in the channel when it rotates, the buffer tank 17 is set up to facilitate the flow of wastewater in the two adjacent channels. However, under this flow action, the wastewater will not circulate in the two channels, but only achieve water pressure balance in the two channels, which is conducive to the diffusion of organic matter.

[0040] Reference Figure 5 Furthermore, the length of the anode and cathode plates 22 gradually increases from the middle to both sides of the electrode module 2, thereby forming a concave groove-shaped region on the side of the electrode module 2 facing the guide wheel 3. The groove-shaped regions of the upper and lower electrode modules 2 together constitute a circular region, which coincides with the mixing and diffusion region. The guide wheel 3 is located within this circular region to facilitate the diffusion of organic matter from the mixing and diffusion region into the channel.

[0041] Furthermore, in this embodiment, the cathode plate 21 and anode plate 22 in the electrode module 2 located at the first template 12 are configured as straight plates; and the cathode plate 21 and anode plate 22 in the electrode module 2 located at the second template 13 are configured as arc-shaped plates. Since organic matter is more easily diffused downwards under the influence of gravity, the arc-shaped plates are beneficial for increasing the reaction area. The straight plates, on the other hand, are beneficial for reducing resistance, thereby facilitating the diffusion of organic matter.

[0042] Reference Figure 1 and Figure 2In addition, the first template 12 and the second template 13 are provided with several vent holes 16, which are connected to the buffer tank and are used to discharge trace amounts of carbon dioxide gas generated by electrocatalytic oxidation. The diameter of the vent holes 16 needs to be controlled within a certain range, for example, between 0.01mm and 0.05mm, to meet the exhaust requirements and ensure that wastewater cannot flow out of the vent holes on its own.

[0043] Reference Figure 3 and Figure 4 The main body 11 has a first through hole 111 and a second through hole 112 on its two opposite sidewalls. A first conductive connector 23 is provided on the cathode plate 21, passing through the first through hole 111. A second conductive connector 24 is provided on the anode plate 22, passing through the second through hole 112. A sealing element, such as a sealing ring, is provided in both the first through hole 111 and the second through hole 112, thereby achieving a waterproof seal for the gaps. The structural form of the sealing element is not limited, as long as it achieves a waterproof seal. In addition to sealing rings, sealant can also be used.

[0044] Reference Figure 3 and Figure 4 Furthermore, the lengths of the cathode plate 21 and the anode plate 22 are the same as the distance between the opposite side walls of the main body 11, which ensures that both ends of the cathode plate 21 and the anode plate 22 are in close contact with the main body 11. Simultaneously, the insertion and engagement of the first conductive connector 23 with the first through hole 111 limits the cathode plate 21, thereby achieving fixation; the engagement of the second conductive connector 24 with the second through hole 112 limits the anode plate 22, thereby achieving fixation.

[0045] Mounting grooves 113 are provided on the side wall of the main body portion 11 where the first through hole 111 is located and the side wall of the main body portion 11 where the second through hole 112 is located. The mounting groove 113 corresponding to the first through hole 111 is called the first mounting groove 113, and the mounting groove 113 corresponding to the second through hole 112 is called the second mounting groove 113. The first through hole 111 is located on the inner wall of the first mounting groove 113, and the second through hole 112 is located on the inner wall of the second mounting groove 113. This allows the first conductive connector 23 to extend into the first mounting groove 113, and the second conductive connector 24 to extend into the second mounting groove 113.

[0046] Reference Figure 3 and Figure 4Furthermore, a first electrical contact plate 4 is disposed in the first mounting groove 113, and a second electrical contact plate 5 is disposed in the second mounting groove 113. Both the first electrical contact plate 4 and the second electrical contact plate 5 are connected to the main body 11 by bolts. The first conductive connector 23 contacts the first electrical contact plate 4, and the second conductive connector 24 contacts the second electrical contact plate 5. The first electrical contact plate 4 and the second electrical contact plate 5 can be connected to a power source, thereby enabling the anode and cathode plates 22 to be energized.

[0047] Both the first mounting slot 113 and the second mounting slot 113 are equipped with cover plates 19, and the cover plates 19 are detachably connected to the main body 11 by bolts.

[0048] Reference Figure 5 Furthermore, the guide wheel 3 has a central rotating shaft 31 and multiple blades 32. The central rotating shaft 31 is rotatably connected to the main body 11 of the wastewater treatment chamber 1. The end of the central rotating shaft 31 extends to the outside of the wastewater treatment chamber 1 and can be connected to a drive source, such as a motor, to realize the rotation of the guide wheel 3, thereby agitating the wastewater in the mixing and diffusion zone, thereby accelerating the diffusion of organic matter to the electrocatalytic oxidation zone.

[0049] In this application, two electrode modules 2 and a guide wheel 3 constitute an electrocatalytic oxidation unit. Multiple sets of these electrocatalytic oxidation units can be installed inside the wastewater treatment chamber 1, arranged side-by-side. The specific number can be determined based on the wastewater treatment capacity and the internal space of the wastewater treatment chamber 1. In this embodiment, there are two electrocatalytic oxidation units, spaced apart. The guide wheels 3 in adjacent electrocatalytic oxidation units rotate in opposite directions, and the two sets of electrocatalytic oxidation units operate independently.

[0050] The implementation principle of the electrocatalytic oxidation device in this embodiment is as follows: wastewater enters the wastewater treatment chamber 1 through the inlet 14 and fills the wastewater treatment chamber 1; the electrode module 2 is energized, and under the action of the cathode plate 21 and the anode plate 22, the organic matter in the wastewater decomposes into carbon dioxide and water. Furthermore, as electrolysis proceeds, the content of organic matter in the wastewater within the electrocatalytic oxidation zone gradually decreases.

[0051] As electrolysis proceeds, the guide wheel 3 rotates under the drive of an external power source (motor) at a speed of 100-500 rpm, agitating the wastewater in the mixing and diffusion zone. This accelerates the diffusion of organic matter from the mixing and diffusion zone into the electrocatalytic oxidation zone, thereby improving mass transfer and ensuring the efficiency of electrocatalytic oxidation.

[0052] Meanwhile, under the action of the guide wheel 3, the wastewater in the mixing and diffusion zone will flow into the electrolysis module, colliding with the wastewater inside the electrolysis module to generate turbulence. Furthermore, under the action of the buffer tank 17 on the first template 12 and the second template 13, the wastewater inside the electrolysis module will flow back and forth, accelerating the turbulence and reducing the concentration gradient of organic matter, thereby ensuring the efficiency of electrocatalytic oxidation.

[0053] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An electrocatalytic oxidation device for efficient treatment of low-matrix wastewater, characterized in that, include: Wastewater treatment chamber (1), which is provided with an inlet (14) and an outlet (15); the internal space of the wastewater treatment chamber (1) includes an electrocatalytic oxidation zone and a mixing diffusion zone; the electrocatalytic oxidation zone and the mixing diffusion zone are connected. An electrode module (2) is located within the electrocatalytic oxidation zone. The electrode module (2) includes multiple electrode plates arranged in parallel, each electrode plate including multiple cathode plates (21) and multiple anode plates (22), which are alternately distributed. Both the cathode plates (21) and anode plates (22) are fixedly connected to the wastewater treatment chamber (1). A channel is formed between adjacent cathode plates (21) and anode plates (22). The channel is oriented towards the mixing and diffusion zone. The guide wheel (3) is rotatably set in the mixing and diffusion zone; the guide wheel (3) is connected to a power source to achieve autonomous rotation and agitate the wastewater in the mixing and diffusion zone; The electrocatalytic oxidation zone is provided in two places, and the mixed diffusion zone is located between the two electrocatalytic oxidation zones; the electrode module (2) is also provided in two sets, and is located in different electrocatalytic oxidation zones respectively; the guide wheel (3) is located between the two sets of electrode modules (2); The wastewater treatment chamber (1) has a bottom and a top, and the two electrocatalytic oxidation zones are respectively located at the bottom and top of the wastewater treatment chamber (1); the inlet (14) is located at the bottom of the wastewater treatment chamber (1), and the outlet (15) is located at the top of the wastewater treatment chamber (1); The electrode module (2) located at the bottom of the wastewater treatment chamber (1) has an arc-shaped cathode plate (21) and an anode plate (22) in the electrode module (2); the electrode module (2) located at the top of the wastewater treatment chamber (1) has a straight cathode plate (21) and an anode plate (22) in the electrode module (2).

2. The electrocatalytic oxidation device for high-efficiency treatment of low-matrix wastewater according to claim 1, characterized in that, Two sets of electrode modules (2) and a guide wheel (3) constitute an electrocatalytic oxidation unit. Multiple electrocatalytic oxidation units are arranged in parallel in the wastewater treatment chamber (1).

3. The electrocatalytic oxidation device for high-efficiency treatment of low-matrix wastewater according to claim 2, characterized in that, The electrode modules (2) in two adjacent electrocatalytic oxidation units are spaced apart; the guide wheels (3) in two adjacent electrocatalytic oxidation units rotate in opposite directions.

4. The electrocatalytic oxidation device for high-efficiency treatment of low-matrix wastewater according to claim 1, characterized in that, The wastewater treatment chamber (1) has a first template (12) and a second template (13), which are respectively located on opposite sides of the wastewater treatment chamber (1) and serve as two side walls of the wastewater treatment chamber (1); One of the electrocatalytic oxidation zones is located at the first template (12), and the other electrocatalytic oxidation zone is located at the second template (13); the cathode plate (21) and the anode plate (22) are both arranged along the direction from the first template (12) to the second template (13); one set of electrode modules (2) is set close to the first template (12), and the cathode plate (21) and the anode plate (22) in the electrode module (2) are both in contact with the side wall of the first template (12); another set of electrode modules (2) is set close to the second template (13), and the cathode plate (21) and the anode plate (22) in the electrode module (2) are both in contact with the side wall of the second template (13).

5. The electrocatalytic oxidation device for high-efficiency treatment of low-matrix wastewater according to claim 4, characterized in that, Multiple buffer slots (17) are provided on both the first template (12) and the second template (13), and the multiple buffer slots (17) are arranged in parallel; two adjacent channels on the electrode module (2) are connected to the same buffer slot (17), and these two adjacent channels are connected through the buffer slot (17).

6. The electrocatalytic oxidation device for high-efficiency treatment of low-matrix wastewater according to claim 1, characterized in that, The electrode module (2) has a concave groove-shaped area on the side facing the guide wheel (3).

7. The electrocatalytic oxidation device for high-efficiency treatment of low-matrix wastewater according to claim 1, characterized in that, The wastewater treatment chamber (1) has a first through hole (111) and a second through hole (112) on its side wall; a first electrical contact plate (4) and a second electrical contact plate (5) are provided on the outside of the wastewater treatment chamber (1). The cathode plate (21) is provided with a first conductive connector (23), which passes through the first through hole (111) and is electrically connected to the first junction plate (4). The anode plate (22) is provided with a second conductive connector (24), which passes through the second through hole (112) and is electrically connected to the second junction plate (5).

8. The electrocatalytic oxidation device for high-efficiency treatment of low-matrix wastewater according to claim 7, characterized in that, The wastewater treatment chamber (1) has an installation groove (113) on its outer wall. The groove opening of the installation groove (113) is equipped with a cover plate (19), which is detachably connected to the wastewater treatment chamber (1). The first power board (4) and the second power board (5) are both located inside the installation groove (113). The first through hole (111) and the second through hole (112) are both equipped with sealing elements.

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