Electro-oxidation device and electro-oxidation system

Abstract

The utility model relates to the field of wastewater treatment, and discloses an electrooxidation device and an electrooxidation system.The electrooxidation device comprises a shell, a first connecting part is arranged on one side wall of the shell, a second connecting part is arranged on the other side wall of the shell, and the first connecting part is matched with the second connecting part; the first connecting part is provided with a first connecting conductor, the second connecting part is provided with a second connecting conductor, and when the first connecting part of one electrooxidation device is connected with the second connecting part of the other electrooxidation device, the corresponding first connecting conductor is in contact with the second connecting conductor, so that a communicated circuit is formed between the electrooxidation devices. According to the technical scheme, the first connecting conductors and the second connecting conductors among the plurality of electro-oxidation devices are sequentially contacted while the plurality of electro-oxidation devices are connected together, a communicated circuit is formed among the electro-oxidation devices, and the electro-oxidation device is simple to operate, small in occupied space and safer.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment, specifically to an electro-oxidation device and an electro-oxidation system. Background Technology

[0002] Electro-oxidation is a wastewater treatment method that involves the oxidation of organic pollutants in wastewater under the influence of an electric field, thereby achieving degradation. In actual production, the types of wastewater treated by electro-oxidation are diverse, and the wastewater volume, treatment time, and treatment potential vary depending on the production scenario. Therefore, a single electro-oxidation device cannot usually be used for all wastewater. To address this issue, existing technologies typically adjust the number of electro-oxidation devices based on the actual wastewater conditions and connect multiple devices together for wastewater treatment. However, connecting multiple devices requires sequentially connecting the anode and cathode plates of different devices using wires, which is time-consuming, labor-intensive, and exposes the wires, posing a safety hazard and consuming significant space. Utility Model Content

[0003] The purpose of this invention is to overcome the problems of existing technology where connecting multiple electro-oxidation devices together requires the use of wires to sequentially connect the anode and cathode terminals of different electro-oxidation devices, which is time-consuming and labor-intensive, and the exposed wires are unsafe and take up a lot of space.

[0004] To achieve the above objectives, this utility model provides an electro-oxidation device, including a housing, a first connecting portion on one side wall of the housing, and a second connecting portion on the other side wall of the housing. The first connecting portion and the second connecting portion are adapted to each other. A first connecting conductor is provided on the first connecting portion, and a second connecting conductor is provided on the second connecting portion. When the first connecting portion of one electro-oxidation device is connected to the second connecting portion of another electro-oxidation device, the corresponding first connecting conductor and the second connecting conductor come into contact to form a connected circuit between the electro-oxidation devices.

[0005] In some embodiments, the first connecting portion includes a groove disposed on one side wall of the housing, and a first connecting conductor is provided in the groove;

[0006] The second connection part includes a protrusion disposed on the opposite side wall of the housing, and a second connecting conductor disposed on the protrusion. The protrusion is capable of entering a groove in an adjacent housing to connect multiple housings, and the second connecting conductor on the protrusion contacts a first connecting conductor in an adjacent groove to form a connected circuit.

[0007] In some embodiments, both the groove and the protrusion are L-shaped. The vertical portion of the groove is located inside the horizontal portion, and the vertical portion of the protrusion is located outside the horizontal portion. The vertical portion of the groove is adapted to the vertical portion of the protrusion. The width of the horizontal portion of the groove is adapted to the width of the horizontal portion of the protrusion. The height of the horizontal portion of the groove is higher than the height of the horizontal portion of the protrusion, so that the protrusion can enter the groove.

[0008] In some embodiments, the first connecting conductor includes a first cathode conductor and a first anode conductor, and the second connecting conductor includes a second cathode conductor and a second anode conductor. When the bump enters the groove, the first cathode conductor contacts the second cathode conductor, and the first anode conductor contacts the second anode conductor.

[0009] In some embodiments, the electro-oxidation device further includes an electro-oxidation chamber protective shell located inside the outer shell. The electro-oxidation chamber protective shell is provided with conductive wires that pass through the wall of the electro-oxidation chamber protective shell and are connected to a first connecting conductor and a second connecting conductor.

[0010] In some embodiments, the protective shell of the electro-oxidation chamber is provided with an electro-oxidation chamber, and the conductive wires include cathode conductive wires and anode conductive wires. The cathode conductive wires and anode conductive wires are located outside the electro-oxidation chamber and are respectively connected to the cathode conductive plate and the anode conductive plate in the electro-oxidation chamber.

[0011] In some embodiments, the electro-oxidation chamber further includes a plurality of cathode plates and a plurality of anode plates. The cathode conductive plates and anode conductive plates are respectively disposed on opposite sides of the electro-oxidation chamber. The cathode plates and anode plates are respectively arranged perpendicularly along the length direction of the cathode conductive plates and anode conductive plates and are arranged alternately. The ends of the cathode plates and anode plates are respectively separated from the anode conductive plates and cathode conductive plates to allow liquid in the electro-oxidation chamber to pass through.

[0012] In some embodiments, the housing is provided with an inlet and an outlet, which are located on the side wall of the housing where the first and second connecting portions are not provided.

[0013] The second aspect of this utility model provides an electro-oxidation system, which includes a power source and a plurality of electro-oxidation devices. The electro-oxidation devices are connected to each other through a first connection part and a second connection part, and the power source is electrically connected to a first connection conductor or a second connection conductor.

[0014] In some embodiments, the electro-oxidation system further includes a connecting pipe, the two ends of which are respectively connected to the outlet and inlet of different electro-oxidation devices.

[0015] The above technical solution connects multiple electro-oxidation devices sequentially through a first connecting part and a second connecting part on the outer casing. A first connecting conductor and a second connecting conductor connected to the circuit of the electro-oxidation device are provided on the first connecting part and the second connecting part. While connecting multiple electro-oxidation devices together, the first connecting conductor and the second connecting conductor between the multiple electro-oxidation devices come into contact sequentially, forming a connected circuit between the electro-oxidation devices. The operation is simple, occupies little space, and is safer. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the electro-oxidation device disclosed in an embodiment of this utility model;

[0017] Figure 2 This is a schematic diagram of the connection and coordination of the electro-oxidation device disclosed in this embodiment of the utility model;

[0018] Figure 3 This is a schematic diagram of the connection between the electro-oxidation device and the power supply disclosed in this embodiment of the utility model;

[0019] Figure 4 This is a schematic diagram of the series connection of the electro-oxidation device disclosed in this embodiment of the utility model;

[0020] Figure 5 This is a schematic diagram of the parallel connection of the electro-oxidation device disclosed in this embodiment of the utility model;

[0021] Figure 6 This is a schematic diagram of the series-parallel hybrid connection of the electro-oxidation device disclosed in the embodiments of this utility model.

[0022] Explanation of reference numerals in the attached figures

[0023] 1. Electro-oxidation device; 11. Outer shell; 111. Groove; 112. Protrusion;

[0024] 113. First connecting conductor; 113a. First cathode conductor; 113b. First anode conductor; 114. Second connecting conductor; 114a. Second cathode conductor; 114b. Second anode conductor; 115. First insulator; 116. Second insulator;

[0025] 12. Protective shell for the electro-oxidation chamber; 121. Electro-oxidation chamber; 1211a. Cathode conductive plate; 1211b. Anode conductive plate; 1212a. Cathode plate; 1212b. Anode plate; 1213. Insulating plate;

[0026] 117. Inlet; 118. Outlet;

[0027] 122, Conductive wire; 122a, Cathode conductive wire; 122b, Anode conductive wire;

[0028] 2. Power supply; 3. Connecting pipes. Detailed Implementation

[0029] In this invention, unless otherwise stated, directional terms such as "up," "down," "left," "right," "inner," and "outer" are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] To address the problems of existing technologies where connecting multiple electro-oxidation devices requires sequentially connecting the anode and cathode terminals of unconnected devices with wires, which is time-consuming, labor-intensive, unsafe due to exposed wires, and space-consuming, this invention provides an electro-oxidation device, such as... Figure 1 As shown, the electro-oxidation device includes a housing 11, which is made of an insulating material, specifically polytetrafluoroethylene (PTFE) or other non-conductive polymer materials. A first connecting portion is provided on one side wall of the housing 11, and a second connecting portion is provided on the other side wall. The first and second connecting portions are adapted to each other, allowing multiple electro-oxidation devices 1 to be sequentially connected together via the first and second connecting portions on the side walls. A first connecting conductor 113 is provided on the first connecting portion, and a second connecting conductor 114 is provided on the second connecting portion. When the first connecting portion of one electro-oxidation device 1 connects to the second connecting portion of another electro-oxidation device 1, the first connecting conductor 113 and the second connecting conductor 114 respectively come into contact, forming a connected circuit between the electro-oxidation devices 1. The above technical solution connects multiple electro-oxidation devices together through the first and second connecting parts on the outer casing 11. A first connecting conductor 113 and a second connecting conductor 114 are provided on the first and second connecting parts. While connecting multiple electro-oxidation devices together, the first connecting conductor 113 and the second connecting conductor 114 of the multiple electro-oxidation devices come into contact in sequence, forming a connected circuit between the electro-oxidation devices 1. The operation is simple and convenient, occupies little space, and is safer.

[0031] In some embodiments, such as Figure 1-2As shown, the first connecting portion includes a groove 111, which is disposed on one side wall of the housing 11. The side wall is recessed inward to form the groove 111, and a first connecting conductor 113 is disposed in the recess of the groove 111. The second connecting portion includes a protrusion 112, which is disposed on the opposite side wall of the housing 11. A second connecting conductor 114 is disposed on the protrusion 112. The protrusion 112 can enter the groove 111 of an adjacent housing 11 to connect multiple housings 11. When the protrusion 112 enters the groove 111, the second connecting conductor 114 on the protrusion 112 contacts the first connecting conductor 113 in the adjacent groove 111, forming a connected circuit. Figure 1-2 The groove 111 and protrusion 112 are disposed on opposite sidewalls of the housing 11, so that when multiple electro-oxidation devices 1 are connected together, they are arranged in a straight line. Alternatively, the groove 111 and protrusion 112 can be disposed on adjacent sidewalls of the housing 11, so that when multiple electro-oxidation devices 1 are connected together, they are arranged in a zigzag line. Or, a combination of both can be used, arranging multiple electro-oxidation devices 1 according to the actual placement space. Furthermore, the first connecting part and the second connecting part can also adopt other structures, such as both being configured as mutually cooperating grooves and protrusions protruding from the sidewalls of the housing 11; or directly disposing of the first connecting conductor 113 and the second connecting conductor 114 on the sidewalls of the housing 11, with the sidewalls of different electro-oxidation devices 1 pressed tightly together to form a connected circuit.

[0032] In some embodiments, such as Figure 1-2 As shown, both the groove 111 and the protrusion 112 are L-shaped. The vertical portion of the groove 111 is located inside the horizontal portion, and the vertical portion of the protrusion 112 is located outside the horizontal portion. The vertical portions of the groove 111 and the protrusion 112 are adapted to each other, and the width of the horizontal portion of the groove 111 is adapted to the width of the horizontal portion of the protrusion 112. To allow the protrusion 112 to smoothly enter the groove 111, the height of the horizontal portion of the groove 111 is set higher than the height of the horizontal portion of the protrusion 112. When connecting the two electro-oxidation devices 1 together, one of the electro-oxidation devices 1 is lifted, allowing its protrusion 112 to enter the groove 111 of the other electro-oxidation device 1. The sidewalls of the two electro-oxidation devices 1 will fit tightly together, completing the connection. The shapes of the groove 111 and the protrusion 112 allow the electro-oxidation devices 1 to fit together more tightly, reducing the space occupied and ensuring a firm connection that is not easily separated. The groove 111 and the protrusion 112 can also be other shapes, such as setting the protrusion 112 as a protrusion with multiple continuous protrusions, and the groove 111 as a corresponding recess. The protrusion 112 and the groove 111 fit into each other, making the connection between the electro-oxidation devices 1 more secure.

[0033] In some embodiments, such as Figure 1-2As shown, the first connecting conductor 113 includes a first cathode conductor 113a and a first anode conductor 113b, and the second connecting conductor 114 includes a second cathode conductor 114a and a second anode conductor 114b. When the protrusion 112 enters the groove 111, the first cathode conductor 113a contacts the second cathode conductor 114a, and the first anode conductor 113b contacts the second anode conductor 114b, forming a connected circuit between the electro-oxidation devices 1. To prevent the first cathode conductor 113a and the first anode conductor 113b from contacting each other, and the second cathode conductor 114a and the second anode conductor 114b from contacting each other, a first insulator 115 is provided between the first cathode conductor 113a and the first anode conductor 113b, and a second insulator 116 is provided between the second cathode conductor 114a and the second anode conductor 114b. Figure 1-2 In the process, the first cathode conductor 113a and the first anode conductor 113b are disposed on the inner wall of the vertical portion of the groove 111, arranged at intervals in the vertical direction. The second cathode conductor 114a and the second anode conductor 114b are disposed on the outer side of the vertical portion of the protrusion 112, arranged at intervals in the vertical direction. When the protrusion 112 enters the groove 111, the first cathode conductor 113a contacts the second cathode conductor 114a, and the first anode conductor 113b contacts the second anode conductor 114b, forming a connected circuit between the two parts of the electro-oxidation device 1. Alternatively, the first connecting conductor 113 and the second connecting conductor 114 can be disposed at other positions in the groove 111 and the protrusion 112, as long as it is ensured that after the protrusion 112 enters the groove 111, the first cathode conductor 113a contacts the second cathode conductor 114a, and the first anode conductor 113b contacts the second anode conductor 114b.

[0034] In some embodiments, such as Figure 1 As shown, the electro-oxidation device 1 also includes an electro-oxidation chamber protective shell 12, which is located inside the outer shell 11. The outer wall of the electro-oxidation chamber protective shell 12 is made of insulating material. A conductive wire 122 is provided inside the electro-oxidation chamber protective shell 12. The conductive wire 122 passes through the wall of the electro-oxidation chamber protective shell 12 and is connected to the first connecting conductor 113 and the second connecting conductor 114, forming a connected circuit between the outer shell 11 and the electro-oxidation chamber protective shell 12.

[0035] In some embodiments, such as Figure 1As shown, the electro-oxidation chamber 121 is housed within the protective shell 12 of the electro-oxidation chamber. The conductive wires 122 include a cathode conductive wire 122a and an anode conductive wire 122b. The cathode conductive wire 122a and the anode conductive wire 122b are located outside the electro-oxidation chamber 121, specifically between the outer wall of the protective shell 12 and the electro-oxidation chamber 121, and are separated by an insulating material. The cathode conductive wire 122a and the anode conductive wire 122b are respectively connected to the cathode conductive plate 1211a and the anode conductive plate 1211b in the electro-oxidation chamber 121, supplying power to the electro-oxidation reaction in the electro-oxidation chamber 121.

[0036] In some embodiments, such as Figure 1 As shown, the electro-oxidation chamber 121 also includes multiple cathode plates 1212a and multiple anode plates 1212b. Cathode conductive plates 1211a and anode conductive plates 1211b are respectively disposed on opposite sides of the electro-oxidation chamber 121, separated at both ends by an insulating plate 1213. The cathode plates 1212a and anode plates 1212b are arranged perpendicularly to their respective lengths and alternately, ensuring sufficient contact between the introduced wastewater and the cathode plates 1212a and anode plates 1212b, thereby improving wastewater treatment efficiency. Spacing is provided between the ends of the cathode plates 1212a and anode plates 1212b and the anode conductive plates 1211b and 1211a, respectively, forming a flow channel through which the liquid in the electro-oxidation chamber 121 passes. Since this utility model aims to treat multiple types of wastewater with the same equipment, the cathode plate 1212a is made of TA2 or stainless steel, and the anode plate 1212b is made of materials such as BDD electrode, precious metal electrode (Ir, Ru), graphite electrode or shape-stabilized anode (DSA) to slow down the corrosion rate of the electrode materials by the wastewater, extend the service life of the electrode materials, and reduce the occurrence of side reactions.

[0037] In some embodiments, such as Figure 1 and Figure 4-6 As shown, the outer casing 11 is provided with an inlet 117 and an outlet 118. To allow water to enter and exit without affecting the connection of the electro-oxidation device 1, the inlet 117 and outlet 118 are located on the side wall of the outer casing 11 where the first and second connecting parts are not located. Preferably, the inlet 117 and outlet 118 are located on the same side wall to facilitate connecting the outlets 118 and inlets 117 of different electro-oxidation devices 1. The inlet 117 and outlet 118 communicate with the electro-oxidation chamber 121, as shown... Figure 1As shown, to facilitate the connection between the outlet 118 and the inlet 117 of another electro-oxidation device 1, the inlet 117 and the outlet 118 are located on the same side wall of the outer casing 11. The inlet 117 is located at the bottom left side of the side wall of the electro-oxidation chamber 121, and the outlet 118 is located at the top right side of the side wall of the electro-oxidation chamber 121. The cathode plate 1212a and the anode plate 1212b are also arranged alternately in the vertical direction, and the lowest point of the outlet 118 is higher than the highest point of the anode plate 1212b, so that the anode plate 1212b can exert maximum efficiency. After the wastewater enters the electro-oxidation chamber 121 through the inlet 117, it fills the small electro-oxidation chambers separated by the electrode plates from left to right due to gravity. When the liquid level reaches the lowest point of the outlet 118, it flows out. The gaseous products and solid products generated by the electro-oxidation reaction are also discharged from the outlet 118 along with the liquid. The arrangement of the cathode plate 1212a and anode plate 1212b and the positions of the inlet 117 and outlet 118 are not limited to these. The cathode plate 1212a and anode plate 1212b can also be arranged alternately in the horizontal direction, and the positions of the inlet 117 and outlet 118 can be adjusted accordingly, as long as the wastewater is in full contact with the cathode plate 1212a and anode plate 1212b.

[0038] This invention also provides an electro-oxidation system, such as Figure 3 As shown, the electro-oxidation system includes a power supply 2 and multiple electro-oxidation devices 1 as described above. The electro-oxidation devices 1 are connected to each other through a first connection part and a second connection part. The power supply 2 is electrically connected to the first connecting conductor 113 or the second connecting conductor 114. When the power supply 2 is turned on, it supplies power to the adjacent electro-oxidation device 1, thus simultaneously supplying power to multiple electro-oxidation devices 1. Figure 3 The document describes one embodiment of connecting the power supply 2 to the electro-oxidation device 1. In this embodiment, a protrusion is provided on the side wall of the power supply 2, which contacts the first connecting conductor 113 of the electro-oxidation device 1. This effectively reduces the floor space required. An insulating protective cover can be placed over the protrusion 112 at the very end of the electro-oxidation device 1 to isolate it from the outside environment, ensuring safety. Alternatively, the power supply 2 can have a groove and connect to the second connecting conductor 114 of the electro-oxidation device 1. In this case, the first connecting conductor 113 at the very end of the electro-oxidation device 1 is placed in the groove 111, making it less likely to come into contact and further enhancing safety. Of course, the power supply 2 can also use other structures to connect to the electro-oxidation device 1, as long as the power supply 2 can provide power to the electro-oxidation device 1.

[0039] In some embodiments, such as Figure 4 and Figure 6As shown, the electro-oxidation system also includes a connecting pipe 3, with its two ends connected to the outlet 118 and inlet 117 of different electro-oxidation devices 1, respectively, allowing multiple electro-oxidation devices 1 to be connected in series or parallel. The connecting pipe 3 is matched with the electro-oxidation device 1 and has a fixed size, which facilitates the modification and disassembly of the wiring. The connecting pipe 3 can be made of different materials depending on the nature of the wastewater; for example, TA2 or Hastelloy pipes are used for high-chlorine wastewater, 316L stainless steel pipes are used for high-sulfide wastewater, and PVC or HDPE pipes are used for radioactive wastewater.

[0040] Depending on the nature of the wastewater, different connection methods can be used between the connecting pipe 3 and the electro-oxidation device 1 to connect multiple electro-oxidation devices 1 in series or in parallel.

[0041] like Figure 3 As shown, for low-volume, low-concentration wastewater, the wastewater can often meet the discharge standards after staying in the electro-oxidation device 1 for a short time. Therefore, only one electro-oxidation device 1 is needed to treat the wastewater, and the power supply 2 can be connected to one electro-oxidation device 1.

[0042] like Figure 4 As shown, for low-volume, high-concentration wastewater, the wastewater often remains in the electro-oxidation unit 1 for a long time before meeting discharge standards. Therefore, multiple electro-oxidation units 1 need to be connected in series to treat the wastewater. The power supply 2 is connected to the electro-oxidation unit 1, and multiple electro-oxidation units 1 are connected together sequentially through the first and second connecting parts. Connecting pipes 3 are sequentially connected to the outlet 118 and inlet 117 of two adjacent electro-oxidation units 1, thus connecting multiple electro-oxidation units 1 in series. The wastewater to be treated enters from the inlet 117 of the first electro-oxidation unit 1, passes through the connecting pipes 3 sequentially through multiple electro-oxidation units 1, and flows out from the outlet 118 of the last electro-oxidation unit 1, completing the wastewater treatment. The number of electro-oxidation units 1 connected in series can be selected according to treatment needs to balance treatment time and energy consumption and reduce treatment costs.

[0043] like Figure 5 As shown, for high-volume, low-concentration wastewater, the wastewater often only needs a short residence time in the electro-oxidation unit 1 to meet discharge standards. However, due to the large volume of wastewater to be treated, multiple electro-oxidation units 1 can be connected in parallel, and wastewater can be simultaneously introduced into the inlet 117 of multiple electro-oxidation units 1. This allows the same batch of wastewater to enter different electro-oxidation units 1 at the same time, reducing the wastewater treatment time. Depending on the wastewater volume, the number of parallel electro-oxidation units 1 can be adjusted to balance treatment time and energy consumption, thereby reducing wastewater treatment costs.

[0044] like Figure 6As shown, for high-volume and high-concentration wastewater, the wastewater often stays in the electro-oxidation device 1 for a long time before it can meet the discharge standards. In addition, the volume of water to be treated is large. The electro-oxidation device 1 can be connected in series first and then in parallel. At the same time, the residence time of the wastewater in the electro-oxidation device 1 can be extended and the volume of wastewater to be treated by the electro-oxidation device can be increased. According to the wastewater volume and wastewater properties, the number of electro-oxidation devices 1 connected in series and in parallel can be adjusted to balance the treatment time and energy consumption, thereby reducing the wastewater treatment cost.

[0045] The connection methods of the electro-oxidation device 1 are not limited to the series, parallel, or series-to-parallel connections mentioned above. For some wastewaters with unclear properties, experiments are needed to determine the treatment parameters. In this case, different numbers of electro-oxidation devices 1 can be connected in series first, and then the series branches of different numbers of electro-oxidation devices 1 can be connected in parallel to observe the treatment effects of different branches, thereby screening out the optimal treatment method for the wastewater. For another type of wastewater with large volume and complex composition, multi-step treatment is often required. For example, for large-volume, high-ammonia-nitrogen acidic wastewater, the COD can be degraded to the standard first, and then the pH of the wastewater can be adjusted for continued electro-oxidation. This can be achieved by first connecting different electro-oxidation devices 1 in parallel according to the treatment volume to degrade the wastewater COD, then concentrating them into one pipeline to adjust the pH before connecting another electro-oxidation device 1 in parallel pipeline for subsequent ammonia-nitrogen degradation.

[0046] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. An electro-oxidation device (1), characterized in that, The device includes a housing (11), on one side wall of which a first connecting portion is provided, and on the other side wall of which a second connecting portion is provided. The first connecting portion and the second connecting portion are adapted to each other. A first connecting conductor (113) is provided on the first connecting portion, and a second connecting conductor (114) is provided on the second connecting portion. When the first connecting portion of one electro-oxidation device (1) is connected to the second connecting portion of another electro-oxidation device (1), the corresponding first connecting conductor (113) and the second connecting conductor (114) come into contact to form a connected circuit between the electro-oxidation devices (1).

2. The electro-oxidation device (1) according to claim 1, characterized in that, The first connecting part includes a groove (111), the groove (111) is disposed on one side wall of the outer shell (11), and the first connecting conductor (113) is disposed in the groove (111); The second connection portion includes a protrusion (112) disposed on the opposite side wall of the housing (11), and a second connecting conductor (114) disposed on the protrusion (112). The protrusion (112) is capable of entering the groove (111) of the adjacent housing (11) to connect the plurality of housings (11), and the second connecting conductor (114) on the protrusion (112) contacts the first connecting conductor (113) in the adjacent groove (111) to form a connecting circuit.

3. The electro-oxidation device (1) according to claim 2, characterized in that, Both the groove (111) and the protrusion (112) are L-shaped. The vertical part of the groove (111) is located inside the horizontal part, and the vertical part of the protrusion (112) is located outside the horizontal part. The vertical part of the groove (111) is adapted to the vertical part of the protrusion (112). The width of the horizontal part of the groove (111) is adapted to the width of the horizontal part of the protrusion (112). The height of the horizontal part of the groove (111) is higher than the height of the horizontal part of the protrusion (112) so that the protrusion (112) can enter the groove (111).

4. The electro-oxidation device (1) according to claim 2, characterized in that, The first connecting conductor (113) includes a first cathode conductor (113a) and a first anode conductor (113b), and the second connecting conductor (114) includes a second cathode conductor (114a) and a second anode conductor (114b). When the protrusion (112) enters the groove (111), the first cathode conductor (113a) contacts the second cathode conductor (114a), and the first anode conductor (113b) contacts the second anode conductor (114b).

5. The electro-oxidation apparatus (1) according to claim 1, characterized in that, The electro-oxidation device (1) further includes an electro-oxidation chamber protective shell (12), which is located inside the outer shell (11). The electro-oxidation chamber protective shell (12) is provided with a conductive wire (122), which passes through the wall of the electro-oxidation chamber protective shell (12) and is connected to the first connecting conductor (113) and the second connecting conductor (114).

6. The electro-oxidation apparatus (1) according to claim 5, characterized in that, The protective shell (12) of the electro-oxidation chamber is provided with an electro-oxidation chamber (121). The conductive wire (122) includes a cathode conductive wire (122a) and an anode conductive wire (122b). The cathode conductive wire (122a) and the anode conductive wire (122b) are located outside the electro-oxidation chamber (121) and are respectively connected to the cathode conductive plate (1211a) and the anode conductive plate (1211b) in the electro-oxidation chamber (121).

7. The electro-oxidation apparatus (1) according to claim 6, characterized in that, The electro-oxidation chamber (121) further includes a plurality of cathode plates (1212a) and a plurality of anode plates (1212b). The cathode conductive plates (1211a) and the anode conductive plates (1211b) are respectively disposed on opposite sides of the electro-oxidation chamber (121). The cathode plates (1212a) and the anode plates (1212b) are respectively arranged perpendicularly to the length direction of the cathode conductive plates (1211a) and the anode conductive plates (1211b) and are arranged alternately. The ends of the cathode plates (1212a) and the anode plates (1212b) are respectively separated from the anode conductive plates (1211b) and the cathode conductive plates (1211a) to allow liquid in the electro-oxidation chamber (121) to pass through.

8. The electro-oxidation apparatus (1) according to any one of claims 1-7, characterized in that, The outer casing (11) is provided with an inlet (117) and an outlet (118), which are located on the side wall of the outer casing (11) where the first connecting part and the second connecting part are not provided.

9. An electro-oxidation system, characterized in that, The electro-oxidation system includes a power source (2) and a plurality of electro-oxidation devices (1) according to any one of claims 1-8, wherein the electro-oxidation devices (1) are connected to each other via the first connection portion and the second connection portion, and the power source (2) is electrically connected to the first connection conductor (113) or the second connection conductor (114).

10. The electro-oxidation system according to claim 9, characterized in that, The electro-oxidation system also includes a connecting pipe (3), the two ends of which are respectively connected to the outlet (118) and inlet (117) of the different electro-oxidation devices (1).

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