Electrochemical sewage treatment device

Abstract

The utility model discloses an electrochemical sewage treatment device which is characterized in that a water inlet and a water outlet are diagonally arranged, and runners are communicated and separated, so that sewage flowing in from the water inlet finally flows according to a path of a first runner, a third runner, an electrolytic runner, a fourth runner, a second runner and the water outlet; therefore, the stroke of sewage flowing from the water inlet to the water outlet and the borne resistance are basically the same, so that the sewage flowing into the accommodating space from the water inlet can flow through each electrolysis flow channel at basically the same flow speed and flow direction, and each flow of sewage can obtain a larger-area electrochemical reaction effect; and the overall flow direction of the sewage is basically vertical to the moving direction of ions between the electrode plates, so that the sewage is subjected to a more uniform electrochemical treatment effect, the retention time of the sewage in the accommodating space can be greatly reduced, the sewage treatment efficiency and quality are improved, and the electric energy and the treatment cost are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an electrochemical sewage treatment device. Background Art

[0002] In recent years, the rapid development of domestic industry has inevitably generated a large amount of industrial sewage and wastewater (such as industrial sewage and wastewater from chemical polishing, electroplating, anodizing, cleaning, dyeing, degreasing, grinding, PCB circuits, etc.), which must be treated to meet the emission standards before they can be discharged. Otherwise, it will cause serious damage to the surrounding groundwater, soil, surface water or other receiving water environments.

[0003] Currently, the sewage treatment processes widely used in the market mainly include traditional chemical treatment, biochemical treatment and other methods. Using traditional chemical treatment, biochemical treatment and other methods to treat sewage requires the construction of a large amount of infrastructure (including but not limited to collection tanks, regulating tanks, reaction tanks, biochemical tanks, etc.), which occupies a large amount of space and has high construction costs. In addition, the chemical treatment process requires the addition of a large amount of various corresponding chemical raw materials and / or reagents, resulting in high operating and treatment costs. At the same time, the large amount of added chemical raw materials reacts chemically with the components in the sewage and undergoes neutralization reactions, generating a large amount of solid sediment, which will cause secondary pollution. If the solid sediment is further biochemically treated, the operating costs will be even higher and the operation will be very cumbersome.

[0004] Of course, the existing technology also has electrochemical sewage treatment processes (such as electrolytic oxidation, electrolytic reduction, electrocoagulation, electroflocculation, etc.) for industrial sewage treatment. These processes do not have the defects of the above-mentioned traditional chemical treatment, biochemical treatment and other methods, and have the advantages of small initial investment, high degree of automation, low sewage operation and treatment costs, and no secondary pollution. The current electrochemical sewage treatment process adopts a one-stop one-time treatment, that is, a DC power supply is connected to an electrode plate tank for electrochemical sewage treatment. However, the design of the tank body, electrode plate, water inlet, water outlet and flow channel is unreasonable, resulting in large differences in the time that sewage is electrochemically treated in the electrode plate tank, and it is easy for some sewage to be discharged from the outlet without electrochemical treatment, making it difficult for the treated sewage to meet the environmental protection standards as a whole. For this reason, the existing electrochemical sewage treatment process is basically not widely recognized by people, and its market share is extremely low, almost zero. Utility Model Content

[0005] The main purpose of the utility model is to provide an electrochemical sewage treatment device, aiming to improve the treatment efficiency and quality of industrial sewage and reduce the treatment cost.

[0006] To achieve the above-mentioned purpose, the present invention proposes an electrochemical sewage treatment device, comprising a container, wherein the interior of the container is hollow and defines a storage space for accommodating sewage, an electrode group that can be electrically connected to an external power supply is provided in the storage space, and a side wall of the container is provided with a water inlet and a water outlet connected to the storage space, the electrode group comprises a plurality of parallel electrode plates, a filter grid is provided in the storage space, the filter grid divides the storage space into an electrolysis zone and a precipitation zone located below the electrolysis zone, the bottom end of each electrode plate is connected to the filter grid, and the interval between two adjacent electrode plates forms an electrolysis flow channel, the side wall of the container opposite to the plate surface of the first electrode plate is a first box wall, and the interval between the first box wall and the first electrode plate forms a first flow channel, the water inlet It is located at a position on the first box wall corresponding to the lower part of the first electrode plate; the side wall of the container opposite to the plate surface of the tail electrode plate is the second box wall, and the gap between the second box wall and the tail electrode plate forms a second flow channel, and the water outlet is located at a position on the second box wall corresponding to the upper part of the tail electrode plate; the side wall of the container opposite to one side end of all electrode plates is the third box wall, and the gap between the third box wall and all electrode plates forms a third flow channel connected to the first flow channel and the electrolysis flow channel, and the path of the third flow channel to the water outlet through the second flow channel is blocked; the side wall of the container opposite to the other side end of all electrode plates is the fourth box wall, and the gap between the fourth box wall and all electrode plates forms a fourth flow channel connected to the second flow channel and the electrolysis flow channel, and the path of the first flow channel from the water inlet to the fourth flow channel is blocked.

[0007] The technical solution of the utility model is to arrange a filter grid in the accommodating space to divide the accommodating space into an electrolysis zone and a precipitation zone located below the electrolysis zone, connect the bottom ends of multiple electrode plates arranged in parallel with the filter grid, and form an electrolysis flow channel between two adjacent electrode plates; the first flow channel is formed by the gap between the first box wall and the first electrode plate, and the water inlet is arranged at a position of the first box wall corresponding to the lower part of the first electrode plate, the second flow channel is formed by the gap between the second box wall and the tail electrode plate, and the water outlet is arranged at a position of the second box wall corresponding to the upper part of the tail electrode plate, so that the water inlet and the water outlet are arranged diagonally; the third flow channel formed by the gap between the third box wall and one end wall of all the electrode plates is connected to the first flow channel and the electrolysis flow channel, and the path of the third flow channel to the water outlet through the second flow channel is blocked; at the same time, the fourth flow channel formed by the gap between the fourth box wall and the other side end of all the electrode plates is connected to the second flow channel and the electrolysis flow channel, and the path of the first flow channel from the water inlet to the fourth flow channel is blocked. Ultimately, the sewage flowing in through the water inlet flows along the path of the first flow channel-the third flow channel-the electrolysis flow channel-the fourth flow channel-the second flow channel-the water outlet, so that the distance traveled by the sewage from the water inlet to the water outlet and the resistance it endures are basically the same, so that the sewage flowing into the holding space from the water inlet can flow through each electrolysis flow channel at basically the same flow rate and direction, so that each stream of sewage can obtain the electrochemical reaction effect over a larger area, and can ensure that the overall flow direction of the sewage is basically perpendicular to the movement direction of ions between the electrode plates, so that the sewage can obtain a more uniform electrochemical treatment effect, and can greatly reduce the residence time of the sewage in the holding space, improve the efficiency and quality of sewage treatment, and save electricity and treatment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a three-dimensional schematic diagram of the present invention from one angle;

[0009] Figure 2 A three-dimensional schematic diagram of another angle of the utility model

[0010] Figure 3 It is a side view of the utility model;

[0011] Figure 4 for Figure 3 Cross-sectional view along AA direction;

[0012] Figure 5 Schematic diagram of the cover and electrode assembly

[0013] Figure 6 This is the usage status diagram of this practical model;

[0014] Figure 7 for Figure 4 Cross-sectional view along direction BB. DETAILED DESCRIPTION

[0015] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0017] In addition, if there are descriptions involving "first" or "second" in the embodiments of the present invention, the descriptions of "first" or "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0018] The utility model provides an electrochemical sewage treatment device.

[0019] In the embodiment of the present utility model, Figures 1 to 7As shown, the electrochemical sewage treatment device includes a container 1. The container 1 has a hollow interior defining a storage space 10 for accommodating sewage. The storage space 10 is provided with an electrode group 2 that can be electrically connected to an external power source 4. During operation, the electrode group 2 is partially immersed in the sewage. When the electrode group 2 is energized, the sewage can be electrochemically treated to purify the water quality. The side wall of the container 1 is provided with a water inlet 11 and a water outlet 12 that communicate with the storage space 10. The electrode group 2 includes multiple parallel electrode plates 21. When energized, the polarities of adjacent electrode plates 21 are opposite. It should be noted that the term "parallel" here can be completely parallel or approximately parallel, that is, a small angle between the electrode plates 21 is allowed, for example, an angle of 0 to 30 degrees. A filter screen 16 is provided in the accommodation space 10, dividing the accommodation space 10 into an electrolysis zone 101 and a sedimentation zone 102 located below the electrolysis zone 101. The bottom of each electrode plate 21 is connected to the filter screen 16, and the water inlet 11, water outlet 12, and electrode assembly 2 are located above the filter screen 16. Electrochemically generated floccules and / or particulate matter contained in the sewage can pass through the filter screen and enter the sedimentation zone 102 where they are precipitated, significantly reducing the amount of floccules and / or particulate matter contained in the sewage in the electrolysis zone 101. This improves the efficiency and effectiveness of the electrochemical treatment of sewage by the electrode assembly 2 and increases the utilization rate of electrical energy. Furthermore, this prevents the accumulation of floccules and / or particulate matter contained in the sewage between the electrode plates 21, which could cause a short circuit in the electrode assembly 2. The gaps between any two adjacent electrode plates 21 form an electrolysis flow channel 210. The side wall of the container 1 opposite to the plate surface of the first electrode plate 21 is the first box wall 1-1. The gap between the first box wall 1-1 and the first electrode plate 21 forms a first flow channel 211. The water inlet 11 is located at a position on the first box wall 1-1 corresponding to the lower part of the first electrode plate 21. The side wall of the container 1 opposite to the plate surface of the tail electrode plate 21 is the second box wall 1-2, and the gap between the second box wall 1-2 and the tail electrode plate 21 forms a second flow channel 212. The water outlet 12 is arranged at a position of the second box wall 1-2 corresponding to the upper part of the tail electrode plate 21, so that the water inlet 11 and the water outlet are arranged diagonally; the side wall of the container 1 opposite to one side end of all the electrode plates 21 is the third box wall 1-3, and the gap between the third box wall 1-3 and all the electrode plates 21 forms a third flow channel 213 connected to the first flow channel 211 and the electrolysis flow channel 210, and the path of the third flow channel 213 to the water outlet 12 through the second flow channel 212 is blocked, so that the sewage flowing from the first flow channel 211 into the third flow channel 212 can only flow into the electrolysis flow channel 210, and cannot flow to the water outlet 12 through the second flow channel.The side wall of the container 1 opposite to the other side end of all the electrode plates 21 is the fourth box wall 1-4. The gap between the fourth box wall 1-4 and all the electrode plates 21 forms a fourth flow channel 214 connected to the second flow channel 212 and the electrolysis flow channel 210, and the path of the first flow channel 211 from the water inlet 11 to the fourth flow channel 214 is blocked, so that the sewage flowing into the first flow channel 211 through the water inlet 11 can only flow into the third flow channel 213 through the first flow channel 211, and cannot flow directly from the first flow channel 211 to the water outlet 12 through the fourth flow channel 214. Finally, the sewage flowing in through the water inlet 11 flows along the path of the first flow channel 211-the third flow channel 213-the electrolysis flow channel 210-the fourth flow channel 214-the second flow channel 212-the water outlet 12. This flow path can make the distance and resistance of the sewage flowing from the water inlet 11 to the water outlet 12 basically the same, so that the sewage flowing into the holding space from the water inlet 11 can flow through each electrolysis flow channel 210 at basically the same flow rate and direction, so that each stream of sewage can obtain the electrochemical reaction effect in a larger area, and can ensure that the overall flow direction of the sewage is basically perpendicular to the movement direction of ions between the electrode plates, so that the sewage can obtain a more uniform electrochemical treatment effect, and can greatly reduce the residence time of the sewage in the holding space, improve the efficiency and quality of sewage treatment, and save electricity and treatment costs.

[0020] It should be noted that the above-mentioned first and last plates are defined according to the arrangement order of the electrode plates 21 in the accommodation space, wherein the electrode plate 21 with the plate surface opposite to the water inlet is the first electrode plate, and the electrode plate 21 farthest from the water inlet 11 is the last electrode plate.

[0021] The number of electrode plates 21 can be determined according to processing requirements, for example, 2 to 100, preferably 10 to 30, to balance processing effect, efficiency, and equipment cost control. More preferably, 15 to 25, for example, 18, 19, 20, 21, or 22, can be used.

[0022] Further, if Figure 1 、 Figure 2 、 Figure 4 As shown, the outlet 12 is close to or opposite to the fourth flow channel 214, preferably opposite to each other, which can reduce the resistance of sewage when flowing from the fourth flow channel 214 to the outlet 12, making the sewage flow more smoothly; the water inlet 11 is close to or opposite to the third flow channel 213, preferably opposite to each other, so that the water inlet 11 and the water outlet 12 form a three-dimensional diagonal design, which can reduce the resistance of sewage when flowing from the water inlet 11 to the third flow channel 213, making the sewage flow more smoothly, so that the sewage flowing into the water inlet 11 can flow evenly and stably to the outlet 12, and the sewage treatment effect is better. It should be noted that the principle of electrochemical treatment of sewage when the electrode plate 21 is energized is well known to those skilled in the art and will not be described in detail here.

[0023] It is understood that the container 1 can have various embodiments, such as a rectangular parallelepiped, cylindrical, prismatic, or irregular box-shaped structure. In some embodiments of the present invention, the container 1 is preferably a rectangular parallelepiped box-shaped structure. The accommodating space can be rectangular parallelepiped, cylindrical, or octagonal, preferably rectangular parallelepiped.

[0024] Further, if Figure 2 、 Figure 4 and Figure 6 As shown, a mud outlet 13 for communicating with the outside is formed at the bottom of the sedimentation area 102, and sludge formed by flocculants and / or particles brought by sewage in the sedimentation area 102 can be discharged regularly or irregularly through the mud outlet 13.

[0025] Specifically, if Figure 4 As shown, the sedimentation area 102 is in the shape of a trapezoid with a larger top and a smaller bottom, or the sedimentation area 102 is horizontally divided into multiple trapezoidal areas with a larger top and a smaller bottom, so as to better concentrate the sludge in a smaller bottom area, thereby better discharging the sludge. The number of the mud discharge ports 13 can be one or more. When there are multiple, two are preferably used. They are spaced apart along the length direction of the bottom wall of the sedimentation area 102 to facilitate the discharge of sludge. The mud discharge port 13 is connected to the external sludge collection area through a mud discharge pipe 131 to discharge the sludge regularly or irregularly. If necessary, a valve (not shown) can be provided at the mud discharge port 13 to better control the discharge of sludge. The sludge entering the sludge collection area can be subsequently processed. The specific method of collecting it can adopt existing technology, which will not be described here.

[0026] In the embodiment of the present utility model, Figure 7 As shown, a first block 200 is provided in a first region from the first flow channel 211 corresponding to the water inlet 11 to the fourth flow channel 214 corresponding to the other side of the first electrode plate 21, blocking the path of the first flow channel 211 from the water inlet 11 to the fourth flow channel 214. The first block 200 may occupy the entire first region or only a portion of the first region. A second block 100 is provided in a second region from the third flow channel 213 corresponding to the one side of the tail electrode plate 21 to the second flow channel 212 corresponding to the water outlet 12, blocking the path of the third flow channel 213 through the second flow channel 212 to the water outlet 12. The second block 100 may occupy the entire second region or only a portion of the second region. It is understood that the first block 200 and the second block 100 are generally made of an insulating material or coated with an insulating material. The bottom ends of the first block 200 and the second block 100 are connected to the filter screen 16, and the top ends are exposed above the sewage surface.

[0027] It is understandable that when the present invention is working, there is generally a certain distance between the surface of the sewage in the receiving space 10 and the top wall of the receiving space 10. During the electrochemical treatment process, the sewage generally produces foam, which floats on the surface of the sewage and needs to be cleaned regularly or irregularly. Figure 1 、 Figure 6 As shown, an air inlet 14 can be provided on one side wall of the container 1 (such as the first box wall 1-1) at a position above the water surface of the sewage, and a foam discharge port 15 can be provided on the other side wall of the container 1 (such as the second box wall 1-2) at a position above the water surface of the sewage. Blowing air inward at the air inlet 14 can cause the foam on the water surface to move toward the foam discharge port 15 and eventually be discharged through the foam discharge port 15. Specifically, in this embodiment, the air inlet 14 can be connected to an external high-pressure air source (such as an air pump, not shown) through a pipe (not shown), and the foam discharge port 15 is connected to a foam collection area (not shown) through a pipe. When the high-pressure air source is in operation, air is blown through the air inlet 14 into the space above the water surface of the accommodating space 10, causing the foam to eventually flow through the foam discharge port 15 to the foam collection area.

[0028] Understandably, if Figure 1 、 Figure 4 As shown, the container 1 comprises a trough 1A with an open top and a cover 1B that seals the open top of trough 1A. The trough 1A and cover 1B enclose the accommodating space 10. The trough 1A and cover 1B are made of, or coated with, insulating material. The electrode assembly 2 is mounted on the cover 1B or mounted on the trough 1A via an insulating bracket (not shown), with the bottom surface supported by a filter screen 16. To facilitate electrical connection between the electrode assembly 2 and the power source 4, the electrode assembly 2 is mounted on the cover 1B with its upper end extending outward from the cover 1B.

[0029] The external power supply 4 can be a DC power supply or a high-frequency pulse power supply, etc., preferably a high-frequency pulse power supply. The use of a high-frequency pulse power supply can periodically change the polarity of the electrode plate 21, which greatly alleviates the passivation phenomenon of the electrode plate 21, thereby reducing the surface cleaning work of the electrode plate 21 caused by the passivation of the electrode plate 21, and can improve the chemical oxidation effect of the electrode plate 21 on sewage.

[0030] It is understood that the current and voltage between the electrode plates 21 (obtained by connecting the electrode plates 21 in series and in parallel, which is conventional technology), the spacing, and the material of the electrode plates 21 can be set according to actual conditions (e.g., based on basic sewage data). Basic sewage data can be obtained by sampling and testing based on its type.

[0031] For example, assuming that the conductivity of sewage is extremely high and the pH is low (less than 2), the spacing between the electrode plates 21 needs to be set larger, and the current and voltage need to be set smaller to prevent the power supply 4 from being instantly overloaded. And because the pH is low, the material of the electrode plates 21 can be selected from aluminum to avoid the corrosion of the iron electrode plates 21 due to the acidity of the sewage, and to shorten the service life of the electrode plates 21. As the sewage is continuously electrolytically oxidized, the pH value in the water will gradually increase. For the container 1 where the pH of the sewage reaches a certain value, the electrode plates 21 therein can be iron electrode plates 21. The effects of the iron electrode plates 21 and the aluminum electrode plates 21 are different. When choosing, it is necessary to select according to the test data of the sewage and give full play to their respective advantages.

[0032] Furthermore, in some embodiments of the present invention, Figure 4 、 Figure 6 As shown, it also includes a water quality sensor 3, which is arranged in the accommodating space 10 and can monitor the water quality of the sewage. The monitoring parameters depend on the type of sewage, including but not limited to monitoring at least one of the water quality parameters such as pH value, COD, conductivity, etc. in the sewage, and the water quality sensor 3 and the power supply 4 are electrically connected to the control system 5. The control system 5 can adjust parameters such as voltage and current between the electrode plates 21 according to the water quality parameters feedback from the water quality sensor 3 to better chemically treat the sewage.

[0033] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention specification and drawings, or direct / indirect application in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. An electrochemical sewage treatment device, comprising a container (1), wherein the container (1) is hollow and defines a receiving space (10) for receiving sewage, wherein an electrode group (2) electrically connected to an external power source (4) is arranged in the receiving space (10), and a water inlet (11) and a water outlet (12) connected to the receiving space (10) are arranged on the side wall of the container (1), wherein the device is characterized in that: The electrode group (2) comprises a plurality of electrode plates (21) arranged in parallel, a filter grid (16) is arranged in the accommodation space (10), the filter grid (16) divides the accommodation space (10) into an electrolysis area (101) and a precipitation area (102) located below the electrolysis area (101), the bottom end of each electrode plate (21) is connected to the filter grid (16), and the interval between two adjacent electrode plates (21) forms an electrolysis flow channel (210), and the container ( 1) the side wall opposite to the plate surface of the first electrode plate (21) is a first box wall (1-1), the interval between the first box wall (1-1) and the first electrode plate (21) forms a first flow channel (211), the water inlet (11) is arranged at a position of the first box wall (1-1) corresponding to the lower part of the first electrode plate (21); the side wall of the container (1) opposite to the plate surface of the tail electrode plate (21) is a second box wall (1-2), the second box wall (1-2) and the tail electrode plate (21) are spaced apart from each other to form a first flow channel (211), and the water inlet (11) is arranged at a position of the first box wall (1-1) corresponding to the lower part of the first electrode plate (21); ) are spaced apart to form a second flow channel (212), and the water outlet (12) is arranged at a position of the second box wall (1-2) corresponding to the upper part of the tail electrode plate (21); the side wall of the container (1) opposite to one side end of all the electrode plates (21) is a third box wall (1-3), and the space between the third box wall (1-3) and all the electrode plates (21) forms a third flow channel (213) connected to the first flow channel (211) and the electrolysis flow channel (210), and the third flow channel (213) passes through The path from the second flow channel (212) to the water outlet (12) is blocked; the side wall of the container (1) opposite to the other side end of all the electrode plates (21) is a fourth box wall (1-4); the gap between the fourth box wall (1-4) and all the electrode plates (21) forms a fourth flow channel (214) connected to the second flow channel (212) and the electrolysis flow channel (210); and the path from the first flow channel (211) to the fourth flow channel (214) from the water inlet (11) is blocked.

2. The electrochemical sewage treatment device according to claim 1, characterized in that: A first stopper (200) is provided in a first area from the first flow channel (211) corresponding to the water inlet (11) to the fourth flow channel (214) corresponding to the other side end of the first electrode plate (21), and a second stopper (100) is provided in a second area from the third flow channel (213) corresponding to the one side end of the tail electrode plate (21) to the second flow channel (212) corresponding to the water outlet (12).

3. The electrochemical sewage treatment device according to claim 1, characterized in that: The bottom of the sedimentation area (102) is formed with a mud discharge port (13) for connecting to the outside.

4. The electrochemical sewage treatment device according to claim 3, characterized in that: The precipitation area (102) is in a trapezoidal shape that is larger at the top and smaller at the bottom, or the precipitation area (102) is horizontally divided into a plurality of trapezoidal areas that are larger at the top and smaller at the bottom.

5. The electrochemical sewage treatment device according to claim 4, characterized in that: The number of the mud discharge port (13) is one or more.

6. The electrochemical sewage treatment device according to claim 1, characterized in that: The water outlet (12) is close to or opposite to the fourth flow channel (214), and the water inlet (11) is close to or opposite to the third flow channel (213).

7. The electrochemical sewage treatment device according to claim 1, characterized in that: An air inlet (14) is provided on one side wall of the container (1) at a position above the water surface of the sewage, and a foam discharge port (15) is provided on the other side wall of the container (1) at a position above the water surface of the sewage.

8. The electrochemical sewage treatment device according to claim 1, characterized in that: The container (1) comprises a trough body (1A) with an open top and a cover body (1B) which can close the top of the trough body (1A), wherein the trough body (1A) and the cover body (1B) enclose the containing space (10), and the electrode group (2) is mounted on the cover body (1B) or mounted on the trough body (1A) via an insulating bracket.

9. The electrochemical sewage treatment device according to claim 8, characterized in that: The electrode group (2) is mounted on the cover body (1B) and the upper end thereof extends out of the cover body (1B).

10. The electrochemical sewage treatment device according to any one of claims 1 to 9, characterized in that: It also includes a water quality sensor (3), which is arranged in the accommodating space (10) and is electrically connected to an external control system (5) so as to monitor the water quality of the sewage.

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