A modular electrocatalytic oxidation wastewater treatment system

Abstract

The present invention relates to a modular electrocatalytic oxidation sewage treatment system, comprising a catalytic oxidation tank, which has a water inlet, a water outlet and an internal structural support frame, wherein a plurality of installation units are arranged in the frame; an electrocatalytic oxidation device, which is provided with a plurality of groups and respectively installed in each of the installation units, wherein each group of electrocatalytic oxidation devices comprises a shell and at least one pair of electrolytic baskets, wherein each electrolytic basket is filled with a catalyst, and the catalyst is in free contact with the sewage entering the electrolytic basket, wherein each electrolytic basket is respectively connected with an anode and a cathode, and each shell is provided with a water exchange hole; an anode electrode sheet, which is respectively electrically connected to the anode of each electrolytic basket; and a cathode electrode sheet, which is respectively electrically connected to the cathode of each electrolytic basket. Advantages: It can realize the modularization and combination of electrocatalytic oxidation sewage treatment technology and process, improve the treatment efficiency and the adaptability to the changes of sewage composition and flow rate, greatly simplify the operation and maintenance process and reduce the operation and maintenance cost.

Description

Technical Field

[0001] The invention relates to sewage treatment technology, and in particular to a modular electrocatalytic oxidation sewage treatment system. Background Art

[0002] At present, the representative sewage treatment technologies include biochemical technology and membrane technology. Although electrocatalytic oxidation technology and ozone oxidation technology have been tried in some sewage treatment, the treatment effect cannot meet the requirements for some sewage sources, and the operating cost is beyond the acceptable range.

[0003] The advantage of the currently widely used biochemical sewage treatment technology is that for certain sewage that can be biochemically treated, the operating costs can be relatively low, but there are at least the following problems that are difficult to avoid: 1) It is often necessary to build a sewage treatment pool with a large volume or area; 2) The required biochemical reaction time is relatively long; 3) For some pollution sources that cannot be decomposed by microorganisms, that is, non-BOD pollutants, such as printing and dyeing sewage, industrial sewage, coking sewage, etc., biochemical technology generally cannot meet the treatment requirements. If combined with other technologies, the treatment cost is often too high for enterprises to bear.

[0004] Membrane technology can achieve a certain degree of miniaturization, but it often has many shortcomings. For example, the operating cost is high, and in addition to the purified water after the membrane, the membrane treatment technology cannot directly separate pollutants from the sewage. It can only play a role of concentration before the membrane, and it cannot independently complete sewage treatment.

[0005] At present, the oxidation efficiency of ordinary electrocatalytic oxidation wastewater treatment technology is not high. Similarly, the investment and operation costs of ozone oxidation method are very high, and the treatment effect is not ideal.

[0006] A new technology based on efficient electrocatalytic oxidation has achieved efficient micro-active oxygen generation and oxidation reaction by using special catalysts and other technologies. It can directly oxidize and decompose pollutants and separate the decomposed pollutants from water to achieve the goals of reducing COD, BOD, and removing phosphorus and nitrogen. This technology has a wide range of adaptability to pollutants, but its disadvantage is that the equipment for electrocatalytic oxidation is complex, difficult to design, install and maintain, and it is difficult to achieve large-scale industrial application of this type of sewage treatment technology. The modular design and construction technology of electrocatalytic oxidation solves this problem well. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a modular electrocatalytic oxidation wastewater treatment system, which can effectively overcome the technical defects of existing electrocatalytic oxidation applications.

[0008] The technical solution of the present invention to solve the above technical problems is as follows: a modular electrocatalytic oxidation sewage treatment system, comprising a catalytic oxidation tank, the catalytic oxidation tank having a water inlet and a water outlet, a structural support frame arranged inside the catalytic oxidation tank, a plurality of uniformly or regularly distributed installation units arranged inside the structural support frame; an electrocatalytic oxidation device, the electrocatalytic oxidation device is provided with a plurality of groups, and is respectively installed in each of the above installation units in a one-to-one correspondence, each group of the electrocatalytic oxidation devices comprises a shell and at least one pair of electrolytic baskets, each of the above electrolytic baskets is filled with a catalyst, the catalyst freely contacts with sewage entering the inside of the electrolytic basket through the mesh holes on the above electrolytic basket, one of the pair of electrolytic baskets is connected to an anode, the other is connected to a cathode, and each of the shells is provided with a water exchange hole; an anode electrode sheet, the anode electrode sheet is respectively electrically connected to the anode of each of the above electrolytic baskets; a cathode electrode sheet, the cathode electrode sheet is respectively electrically connected to the cathode of each of the above electrolytic baskets.

[0009] The beneficial effects of the present invention are: reasonable structural design, capable of realizing arbitrary modular combination and expansion, improving the sewage treatment efficiency of electrocatalytic oxidation, improving the adaptability of sewage treatment technology of electrocatalytic oxidation (such as changes in influent water quality and influent volume), and can greatly simplify operation and maintenance operations and reduce operating costs.

[0010] Based on the above technical solution, the present invention can also be improved as follows.

[0011] Furthermore, the plurality of the above-mentioned installation units are distributed in a rectangular array.

[0012] The beneficial effect of adopting the above further scheme is that the layout is simple and reasonable, and it is convenient to use multiple groups of electrocatalytic oxidation devices in combination.

[0013] Furthermore, the shell is a rectangular parallelepiped shell.

[0014] The beneficial effect of adopting the above further solution is that the shape is regular, which is conducive to multiple groups of modular distribution.

[0015] Furthermore, in the same row of the electrocatalytic oxidation devices, the upper end of each of the shells is provided with an anode connector and a cathode connector corresponding one-to-one to and electrically connected to the anode and cathode therein, and the lower end of each of the shells is provided with an anode interface and a cathode interface corresponding one-to-one to and electrically connected to the anode and cathode therein, respectively. The anode connector and the cathode connector on the lower shells are respectively and correspondingly inserted into the anode interface and the cathode interface on the upper adjacent shells, and are electrically connected to each other, and the anode connector and the cathode connector on the uppermost shell are respectively and electrically connected to the anode electrode sheet and the cathode electrode sheet.

[0016] The beneficial effect of adopting the above further solution is that the design can realize the rapid installation, combination and expansion between the anodes and cathodes of each column of multiple groups of electrocatalytic oxidation devices.

[0017] Furthermore, the structural support frame defines a plurality of rows of mutually independent and closed electrocatalytic oxidation compartments through partitions installed thereon in the upper and lower directions. The upper and lower ends of each row of the electrocatalytic oxidation compartments are respectively provided with a water inlet and a drain outlet connected to the interior of the catalytic oxidation tank. The plurality of groups of the electrocatalytic oxidation devices in each row are respectively distributed in the electrocatalytic oxidation compartments in each row in a one-to-one correspondence. The upper and lower ends of the shell of each electrocatalytic oxidation device are respectively provided with the water exchange holes. Two adjacent shells are connected through the water exchange holes adjacent to each other. In the same row, two adjacent electrolytic baskets connected to the anode and the electrolytic baskets connected to the cathode are respectively connected through connecting pipes penetrating the corresponding shells of the two.

[0018] The beneficial effect of adopting the above further scheme is that the design can expand the series combination of multiple groups of electrocatalytic oxidation devices in each column, and make the sewage treatment flow along a specific flow path between the multiple groups of electrocatalytic oxidation devices in each column, ultimately achieving effective treatment of sewage.

[0019] Furthermore, water flow guide nozzles are installed at the water inlet and the drain outlet at the upper and lower ends of each row of the electrocatalytic oxidation compartments.

[0020] The beneficial effect of adopting the above further solution is that the design of the water flow guide nozzle can keep the water in the electrocatalytic oxidation device module in a stable or turbulent or rotating form, which is conducive to the good flow of sewage.

[0021] Furthermore, the structural support frame defines a plurality of mutually independent and closed quasi-electrocatalytic oxidation barriers through partitions installed horizontally thereon, and each layer of the quasi-electrocatalytic oxidation barriers is respectively provided with a water inlet and a drain outlet connected to the interior of the catalytic oxidation tank, and the plurality of groups of the electrocatalytic oxidation devices in each layer are connected in series in the quasi-electrocatalytic oxidation barriers of the corresponding layer in the order of spatial positions, and the shell of each of the electrocatalytic oxidation devices is respectively provided with the water exchange holes on both sides of the series connection direction, and two adjacent shells are connected through the water exchange holes close to each other, and in the same layer, two adjacent electrolytic baskets connected to the anode and the electrolytic baskets connected to the cathode are respectively connected through connecting pipes penetrating the corresponding shells of the two.

[0022] The beneficial effect of adopting the above further scheme is that the design can expand the series combination of multiple groups of electrocatalytic oxidation devices on each layer, and make the sewage treatment flow along different and specific flow paths between the multiple groups of electrocatalytic oxidation devices on each layer, ultimately achieving effective sewage treatment.

[0023] Furthermore, each of the above-mentioned electrocatalytic oxidation barrier layers is equipped with a water flow guide nozzle at the water inlet and outlet.

[0024] The beneficial effect of adopting the above further solution is that the design of the water flow guide nozzle can keep the water in the electrocatalytic oxidation device module in a stable or turbulent or rotating form, which is conducive to the good flow of sewage.

[0025] Furthermore, water flow guide nozzles are respectively installed at the water inlet and the outlet of each layer of the above-mentioned electrocatalytic oxidation barrier.

[0026] The beneficial effect of adopting the above further solution is that the arrangement is reasonable, which is conducive to the rapid installation and connection of the anode and the cathode, as well as possible subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of the modular electrocatalytic oxidation sewage treatment system of the present invention.

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0029] 1. Catalytic oxidation tank, 2. Structural support frame, 3. Electrocatalytic oxidation device, 4. Anode electrode sheet, 5. Cathode electrode sheet. DETAILED DESCRIPTION

[0030] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0031] Embodiment: As shown in the figure, the modular electrocatalytic oxidation sewage treatment system of this embodiment comprises a catalytic oxidation pool 1, wherein the catalytic oxidation pool 1 has a water inlet and a water outlet, wherein a structural support frame 2 is provided inside the catalytic oxidation pool 1, wherein a plurality of evenly distributed installation units are provided inside the structural support frame 2; an electrocatalytic oxidation device 3, wherein the electrocatalytic oxidation device 3 is provided in a plurality of groups and is installed in each of the installation units one by one, wherein each group of the electrocatalytic oxidation devices 3 comprises a shell 31 and at least one pair of electrolytic baskets 32, wherein each of the electrolytic baskets 32 is filled with a catalyst, wherein the catalyst is in free contact with sewage entering the electrolytic basket 32 ​​through the mesh holes on the electrolytic basket 32, wherein one of the electrolytic baskets 32 is connected to an anode, and the other electrolytic basket 32 ​​is connected to a cathode, and each of the shells 31 is provided with a water exchange hole; an anode electrode sheet 4, wherein the anode electrode sheet 4 is electrically connected to the anode of each of the electrolytic baskets 32; and a cathode electrode sheet 5, wherein the cathode electrode sheet 5 is electrically connected to the cathode of each of the electrolytic baskets 32.

[0032] When used in combination, multiple groups of the above-mentioned electrocatalytic oxidation devices 3 can be freely combined and spliced ​​through design and installation, that is, they can be connected in series or in parallel. Specifically, multiple baffles are detachably arranged in the structural support frame 2, so that a sewage flow path is formed between the multiple groups of electrocatalytic oxidation devices 3 connected in series, and it is ensured that the water exchange holes of the shell 31 of the electrocatalytic oxidation device 3 located at the upstream beginning (the first one in series) and the downstream end (the last one in series) are respectively connected to the sewage entering the catalytic oxidation tank 1. When connected in parallel, multiple baffles or valves are detachably arranged in the structural support frame 2, so that each sewage flow after parallel connection constitutes a separate sewage treatment channel, and each path can be connected in series by multiple groups of electrocatalytic oxidation devices 3, and it is ensured that the water exchange holes of the shell 31 of the electrocatalytic oxidation device 3 located at the upstream beginning (the first one in series) and the downstream end (the last one in series) are respectively connected to the sewage entering the catalytic oxidation tank 1, thereby completing the integrated, regular and modular splicing of the treatment system.

[0033] As a preferred embodiment, the plurality of mounting units are distributed in a rectangular array, and, optimally, the housing 31 is a rectangular parallelepiped housing.

[0034] During assembly, in the same row of the electrocatalytic oxidation devices 3, the upper end of each of the shells 31 is provided with an anode connector 33 and a cathode connector 34 corresponding to and electrically connected to the anode and cathode therein, and the lower end of each of the shells 31 is provided with an anode interface and a cathode interface corresponding to and electrically connected to the anode and cathode therein, respectively. The anode connector 33 and the cathode connector 34 on the lower shell 31 are respectively inserted into the anode interface and the cathode interface on the upper adjacent shell 31 correspondingly, and are electrically connected to each other. The anode connector 33 and the cathode connector 34 on the uppermost shell 31 are respectively electrically connected to the anode electrode sheet 4 and the cathode electrode sheet 5. This design facilitates the mutual connection between the anodes and the cathodes in multiple groups of electrocatalytic oxidation devices 3, simplifies the connection arrangement scheme of the anode and the cathode, reduces the arrangement difficulty, and is very convenient for the rapid disassembly and assembly of two upper and lower adjacent electrocatalytic oxidation devices 3.

[0035] Of course, the multiple groups of electrocatalytic oxidation devices 3 may also be distributed in a cylindrical array, or other regular array distribution patterns, and are not limited to a rectangular array arrangement.

[0036] Taking a rectangular array as an example, the combination of multiple groups of electrocatalytic oxidation devices 3 has the following multiple modes:

[0037] The structural support frame 2 is defined by partitions installed thereon from top to bottom to define multiple columns of mutually independent and closed electrocatalytic oxidation compartments, and the upper and lower ends of each column of the electrocatalytic oxidation compartments are respectively provided with a water inlet and a drain connected to the inside of the catalytic oxidation tank 1, and the multiple groups of the electrocatalytic oxidation devices 3 in each column are respectively distributed in each column of the electrocatalytic oxidation compartments in a one-to-one correspondence, and the upper and lower ends of the shell 31 of each electrocatalytic oxidation device 3 are respectively provided with the water exchange holes, and two adjacent shells 31 are connected to each other through the water exchange holes close to each other. In the same column, the upper and lower adjacent two electrolytic baskets 32 connected to the anode and the electrolytic baskets 32 connected to the cathode are respectively connected through connecting pipes penetrating the corresponding shells 31 of the two, wherein the lower end area of ​​the lowest electrocatalytic oxidation device 3 is a non-enclosed structure, and maintains communication with the catalytic oxidation tank 1 as a whole, that is, it is connected to the sewage inside the catalytic oxidation tank 1;

[0038] Among them, water flow guide nozzles are installed at the water inlet and drain outlet at the upper and lower ends of each row of the above-mentioned electrocatalytic oxidation compartments. The design of the water flow guide nozzles can enable the water to maintain a stable, turbulent or rotating form in the electrocatalytic oxidation device module, which is conducive to the good flow of sewage.

[0039] It should be noted that the connection between the two upper and lower adjacent electrolytic baskets 32 can facilitate the replenishment or replacement of the internal catalyst between multiple groups of electrolytic baskets 32 connected in series in the same row.

[0040] The structural support frame 2 is defined by a partition installed horizontally thereon to define a plurality of mutually independent and closed quasi-electrocatalytic oxidation barriers, each of which is provided with a water inlet and a drain connected to the interior of the catalytic oxidation tank 1, and a plurality of groups of the electrocatalytic oxidation devices 3 of each layer are connected in series in the spatial position sequence in the quasi-electrocatalytic oxidation barrier of the corresponding layer (specifically: the shells 31 of the plurality of electrocatalytic oxidation devices 3 of each layer are connected in series in a linear spatial position distribution sequence, and the linear spatial position may be a circuitous route), and each of the electrocatalytic oxidation devices 3 is connected in series in the spatial position sequence in the corresponding layer. The shell 31 is provided with the water exchange holes on both sides of the series direction, and the two adjacent shells 31 are connected to each other through the water exchange holes close to each other. In the same layer, the two adjacent electrolysis baskets 32 connected to the anode and the electrolysis baskets 32 connected to the cathode are connected through the connecting pipes penetrating the corresponding shells 31 of the two. Among the multiple groups of shells 31 connected in water (connected in series) in the same group of electrocatalytic oxidation interlayers, the first and last shells 31 are connected to the catalytic oxidation tank 1 as a whole, that is, connected to the sewage inside the catalytic oxidation tank 1;

[0041] Among them, water flow guide nozzles are respectively installed at the water inlet and the drain outlet of each layer of the above-mentioned electrocatalytic oxidation interlayer. This design can expand the combination of multiple groups of electrocatalytic oxidation devices 3 in series on each layer, and make the sewage treatment between the multiple groups of electrocatalytic oxidation devices 3 on each layer flow along different and specific flows, ultimately meeting the effective treatment of sewage.

[0042] 3) In the same row of the electrocatalytic oxidation devices 3, the water exchange holes are provided at the upper and lower ends of the shells 31, and the water exchange holes at the lower end of the shells 31 located above are water-circuit connected (connected in series) with the water exchange holes at the upper end of the shells 31 located below, and water exchange holes are also provided on the side walls of all the shells 31 close to each other in each layer, so that the two are water-circuit connected in the same layer. Specifically, in the multiple shells 31 of each layer, the sides of two adjacent shells 31 close to each other are provided with water exchange holes, and the water exchange holes close to each other are connected to each other.

[0043] It should be particularly noted that the flow direction of sewage inside the multiple groups of electrocatalytic oxidation devices 3 can be adjusted by connecting the shells 31 of each group of electrocatalytic oxidation devices 3 and the connection sequence. Accordingly, partitions are arbitrarily set on the structural support frame 2 according to the flow direction of sewage and the connection relationship between the multiple groups of shells 31, so as to form the required sewage treatment path, and finally the multiple groups of electrocatalytic oxidation devices 3 can be arbitrarily reconstructed in the form of series or parallel connection to meet the requirements for sewage treatment volume and sewage composition changes.

[0044] As a preferred implementation, the anode electrode sheet 4 and the cathode electrode sheet 5 are respectively mounted on the upper end of the catalytic oxidation tank 1, and are reasonably arranged to facilitate the connection of the anode electrode sheet 4 and the cathode electrode sheet 5 to the anode and the cathode respectively.

[0045] One or more monitoring components or sampling points for detecting flow rate, temperature, water pressure, COD, BOD, pH value, total nitrogen, total phosphorus or turbidity / suspended solids can be set at the water inlet and outlet of the catalytic oxidation tank 1 and / or any detection position inside the tank. Combined with the collection of the above information and the working power or voltage and current of the electrodes inside a single or multiple electrocatalytic oxidation devices 3, the operating status of the entire electrocatalytic oxidation system can be monitored.

[0046] The whole system has the following advantages:

[0047] 1) A unified or standardized modular electrocatalytic oxidation device 3 can easily form large-scale mass production and standardized installation, avoiding complex, messy, and complicated installation and testing processes, and can greatly improve construction quality and reduce errors and scrap rates;

[0048] 2) In the whole system, each module is easy to detect and repair. For damaged units, it is only necessary to simply replace the damaged units with good spare units on site, and multiple groups of electrolytic baskets in each column are connected, which can facilitate the subsequent replenishment and replacement of catalysts, and overall reduce the cost of operation and maintenance;

[0049] 3) When in use, the number of electrocatalytic oxidation devices 31 and the series-parallel assembly form can be increased or decreased as needed, so that the efficiency of sewage treatment is greatly improved or, when the treatment requirements are met, the operating costs are reduced and the sewage treatment efficiency of electrocatalytic oxidation is improved;

[0050] 4) When in use, the number of electrocatalytic oxidation units can be easily reduced or expanded according to the source or degree of pollution of the sewage, including increasing or decreasing in different forms of series and parallel connection. When in series connection, multi-level deep treatment can be completed, and when in parallel connection, multiple sewage can be treated simultaneously to improve the treatment capacity. Therefore, the modular design and technology have excellent adaptability.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A modular electrocatalytic oxidation wastewater treatment system, characterized in that: include: A catalytic oxidation tank (1), the catalytic oxidation tank (1) having a water inlet and a water outlet, a structural support frame (2) being provided inside the catalytic oxidation tank (1), and a plurality of evenly or regularly distributed installation units being provided inside the structural support frame (2); An electrocatalytic oxidation device (3), wherein the electrocatalytic oxidation device (3) is provided in a plurality of groups and is installed in each of the installation units in a one-to-one correspondence, each group of the electrocatalytic oxidation device (3) comprises a housing (31) and at least one pair of electrolytic baskets (32), each of the electrolytic baskets (32) is filled with a catalyst, and the catalyst freely contacts the sewage entering the electrolytic basket (32) through the mesh holes on the electrolytic basket (32), one of the electrolytic baskets (32) is connected to an anode, and the other electrolytic basket (32) is connected to a cathode, and each of the housings (31) is provided with a water exchange hole; an anode electrode sheet (4), wherein the anode electrode sheet (4) is electrically connected to the anode of each electrolysis basket (32); A cathode electrode sheet (5), wherein the cathode electrode sheet (5) is electrically connected to the cathode of each electrolysis basket (32); The plurality of installation units are arranged in a rectangular array; in the same row of the electrocatalytic oxidation devices (3), the upper end of each shell (31) is provided with an anode connector (33) and a cathode connector (34) which correspond one-to-one to the anode and cathode therein and are electrically connected, and the lower end of each shell (31) is provided with an anode interface and a cathode interface which correspond one-to-one to the anode and cathode therein and are electrically connected, and the anode connector (33) and the cathode connector (34) on the lower shell (31) are respectively inserted one-to-one into the anode interface and the cathode interface on the upper adjacent shell (31), The anode connector (33) and the cathode connector (34) on the uppermost shell (31) are electrically connected to the anode electrode sheet (4) and the cathode electrode sheet (5), respectively; the structural support frame (2) defines a plurality of mutually independent and closed electrocatalytic oxidation compartments through partitions installed thereon in an upper and lower direction; the upper and lower ends of each column of the electrocatalytic oxidation compartments are respectively provided with a water inlet and a water outlet connected to the interior of the catalytic oxidation tank (1); the plurality of groups of the electrocatalytic oxidation devices (3) in each column are respectively distributed in each column of the electrocatalytic oxidation compartments in a one-to-one correspondence; and each electrocatalytic oxidation compartment is provided with a plurality of electrocatalytic oxidation devices (3) in a one-to-one correspondence. The water exchange holes are respectively provided at the upper and lower ends of the shell (31) of the chemical device (3); the two adjacent shells (31) are connected through the water exchange holes close to each other; in the same row, the electrolysis baskets (32) connected to the anode and the electrolysis baskets (32) connected to the cathode in the two adjacent shells are respectively connected through connecting pipes penetrating the corresponding shells (31); the structural support frame (2) is defined by a partition plate installed horizontally thereon to form a plurality of mutually independent and closed quasi-electrocatalytic oxidation partitions, and each layer of the quasi-electrocatalytic oxidation partition is respectively provided with a catalytic oxidation partition having a plurality of holes connected thereto; The pool (1) has a water inlet and a water outlet connected to each other, and the multiple groups of the electrocatalytic oxidation devices (3) in each layer are connected in series in the electrocatalytic oxidation-like interlayer of the corresponding layer in a spatial position sequence, and the shell (31) of each electrocatalytic oxidation device (3) is provided with the water exchange holes on both sides of the series connection direction, and two adjacent shells (31) are connected through the water exchange holes close to each other, and in the same layer, two adjacent electrolytic baskets (32) connected to the anode and the electrolytic baskets (32) connected to the cathode are connected through connecting pipes penetrating the corresponding shells (31) of the two.

2. A modular electrocatalytic oxidation wastewater treatment system according to claim 1, characterized in that: The housing (31) is a rectangular parallelepiped housing.

3. A modular electrocatalytic oxidation wastewater treatment system according to claim 1, characterized in that: Water flow guide nozzles are installed at the water inlets and the drain outlets at the upper and lower ends of each row of the electrocatalytic oxidation compartments.

4. A modular electrocatalytic oxidation wastewater treatment system according to claim 1, characterized in that: The water inlet and the water outlet of each layer of the electrocatalytic oxidation barrier are respectively provided with water flow guide nozzles.

5. A modular electrocatalytic oxidation wastewater treatment system according to claim 1 or 2, characterized in that: The anode electrode sheet (4) and the cathode electrode sheet (5) are respectively mounted on the upper end of the catalytic oxidation tank (1).

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