Electrochemical water treatment device based on BDD electrode assembly

Abstract

The utility model discloses an electrochemical water treatment device based on a BDD electrode assembly, which belongs to the technical field of water treatment, and comprises a water treatment electrode assembly, a pressure-bearing shell and a water conservancy uniform distribution guide cylinder, the water treatment electrode assembly consists of a cathode plate, an anode plate, a conductive through bolt, a binding post and a flange upper cover plate, the pressure-bearing shell is composed of cathode and anode side guide plates, a water outlet and a main body water treatment device body; the water conservancy uniform distribution guide cylinder is composed of a water inlet and a plurality of water distribution baffles; according to the utility model, the number of the membrane shells can be selected according to process parameters, and serial or parallel configuration is realized through pipeline connection, so that the membrane shells are integrated into efficient and collaborative integrated equipment, and the membrane shells have the remarkable advantages of high mass transfer efficiency, easiness in maintenance and capability of being flexibly adjusted when meeting different process requirements and actual operation conditions; the number of the anode plates and the number of the cathode plates can be selected according to process parameters, and different numbers of the anode plates and the cathode plates can be set for bearing different voltage and current requirements.

Description

Technical Field

[0001] This utility model belongs to the field of water treatment technology, and in particular relates to an electrochemical water treatment device based on a BDD electrode assembly. Background Technology

[0002] Electrochemical treatment has a high degradation capacity, which can directly break the chemical bonds of organic matter and convert it into harmless or low-toxicity small molecules such as carbon dioxide and water. The core of electrochemical water treatment technology lies in the preparation and application of electrode materials. Among them, boron-doped diamond thin film electrode (BDD) has a high oxygen evolution potential and has many advantages such as strong oxidation capacity, fast reaction speed and high treatment efficiency, showing broad application potential.

[0003] However, current reaction devices still face challenges such as low electrolysis efficiency, incomplete electrolysis, and complex system structure. Therefore, how to improve the mass transfer efficiency and reduce operating costs in the internal reaction process of the reactor based on BDD special anode materials has gradually become a research hotspot. Developing high mass transfer BDD electro-oxidation reaction equipment is imperative and is the key to promoting the development of the field of electrochemical treatment.

[0004] Based on this, the present invention designs an electrochemical water treatment device based on a BDD electrode assembly to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to address the problems of low electrolysis efficiency, insufficient electrolysis, and complex system structure in current reaction devices, and to propose an electrochemical water treatment device based on BDD electrode components.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An electrochemical water treatment device based on a BDD electrode assembly includes a water treatment electrode assembly, a pressure-bearing shell, and a hydraulically distributed flow guide tube. The water treatment electrode assembly consists of anode and cathode plates, conductive plugs, terminals, and a flange cover plate. The flange cover plate has an external square plug on its top. The pressure-bearing shell consists of anode and cathode side flow guide plates, an outlet, and a main water treatment body. The hydraulically distributed flow guide tube consists of an inlet and multiple water distribution baffles. The outlet can be either top-mounted or side-mounted, with the top-mounted outlet having a bottom-in, top-out structure to remove bubbles generated during the electrolysis process.

[0008] As a further description of the above technical solution:

[0009] The cathode and anode plates include multiple cathode plates and anode plates, wherein two cathode plates are respectively disposed at both ends of the sewage treatment module, and the remaining cathode plates and multiple anode plates are arranged alternately.

[0010] As a further description of the above technical solution:

[0011] Both the cathode plate and the anode plate have a trapezoidal extension on their upper part, and circular holes are provided on the trapezoidal extension. Two adjacent anode plates and cathode plates are electrically connected by two circular holes through conductive plugs.

[0012] As a further description of the above technical solution:

[0013] The dimensions of the anode plate and the cathode plate are 300 mm × 82 mm, or other various dimensions. The substrate of the anode plate is selected from niobium-based or tantalum-based metal substrates or silicon-based substrates, and the substrate of the cathode plate is selected from titanium-based substrates. The thickness of the substrate ranges from 0.5 to 2 mm.

[0014] The anode plate is a double-sided coated electrode. The electrode coating material on the anode plate is boron-doped diamond, and the thickness of the electrode coating material is 1-20 μm. The maximum current density is 500 Ma / cm². 2 The cathode plate is an electrode made of uncoated titanium-based metal material.

[0015] As a further description of the above technical solution:

[0016] The two terminals located at the positive and negative poles are fastened to the flange cover plate by hexagonal nuts. A flat washer, a spacer sleeve, a sealing ring, and an insulating washer are sequentially placed between the hexagonal nut and the flange cover plate for isolation and sealing.

[0017] As a further description of the above technical solution:

[0018] The anode and cathode plates are provided with hexagonal head bolt holes A at the top, middle and bottom. Multiple cathode plates and multiple anode plates are connected by multiple hexagonal head bolts through multiple hexagonal head bolt holes A. This is used to fix and combine multiple anode plates and multiple cathode plates to form an integral water treatment electrode module, and to ensure that the distance between the anode and cathode is about 2mm.

[0019] As a further description of the above technical solution:

[0020] Multiple water distribution baffles are arranged in different forms inside the water inlet. The arrangement of the multiple water distribution baffles includes square openings with square holes, round openings with square holes, and large square openings with small square holes inside. The water inlet is sealed and isolated from the main water treatment unit by flange gaskets and sealing strips.

[0021] As a further description of the above technical solution:

[0022] The anode plate and cathode plate are provided with threaded holes B at the top, bottom and two trisections. The water treatment electrode module is connected to the pressure-bearing shell by multiple hexagonal head bolts through multiple hexagonal head bolt holes B.

[0023] As a further description of the above technical solution:

[0024] The pressure-bearing outer shell is a stainless steel shell or a cylindrical shell made of fiber-wound fiberglass, and the inner lining of the pressure-bearing outer shell is made of polyvinyl chloride (PVC).

[0025] As a further description of the above technical solution:

[0026] The pressure-bearing housing, the water treatment electrode assembly, and the hydraulic uniformly distributed guide tube are all connected and locked by flanges. The insertion ports of the water treatment electrode assembly and the pressure-bearing housing are both outer circles and inner squares.

[0027] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0028] This invention is flexible, allowing the selection of the number of membrane shells based on process parameters, and enabling series or parallel configurations through pipeline connections, thereby integrating them into a highly efficient and collaborative integrated device. It has significant advantages such as high mass transfer efficiency, easy maintenance, and the ability to be flexibly adjusted to meet different process requirements and actual operating conditions. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the assembly structure of an electrochemical water treatment device based on a BDD electrode assembly proposed in this utility model.

[0030] Figure 2 This is a side view of an electrochemical water treatment device based on a BDD electrode assembly proposed in this utility model.

[0031] Figure 3 This is a schematic diagram of the connection between the anode plate and the cathode plate in an electrochemical water treatment device based on a BDD electrode assembly proposed in this utility model.

[0032] Figure 4 This is a cross-sectional schematic diagram of an electrochemical water treatment device based on a BDD electrode assembly proposed in this utility model.

[0033] Figure 5 This is a top view of the structure of an electrochemical water treatment device based on a BDD electrode assembly proposed in this utility model.

[0034] Figure 6 This is a schematic diagram of the structure of an electrochemical water treatment device based on a BDD electrode assembly with different placement and outlet arrangement forms proposed in this utility model.

[0035] Figure 7 This is a schematic diagram of the series-parallel integration of an electrochemical water treatment device based on a BDD electrode assembly proposed in this utility model.

[0036] Figure 8 This is a schematic diagram of the flow guide plate arrangement in an electrochemical water treatment device based on a BDD electrode assembly proposed in this utility model.

[0037] Legend:

[0038] 1. Flange cover plate; 2. Terminal block; 3. Anode and cathode plates; 4. Conductive plug; 5. Trapezoidal extension; 6. Water outlet; 7. Main water treatment unit; 8. Hydraulic distribution guide tube; 9. Hexagonal nut; 10. Flat washer; 11. Isolation sleeve; 12. Sealing ring; 13. Insulating washer; 14. Flange gasket; 15. Sealing strip; 16. External square plug; 17. Hexagonal head bolt; 18. Water distribution baffle. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0040] like Figure 1 As shown, an electrochemical water treatment device based on a BDD electrode assembly includes a water treatment electrode assembly, a pressure-bearing shell, and a hydraulically distributed flow guide tube 8. The water treatment electrode assembly consists of anode and cathode plates 3, conductive plugs 4, terminals 2, and flange cover plates 1. The pressure-bearing shell consists of anode and cathode side flow guide plates, an outlet 6, and a main water treatment body 7. The hydraulically distributed flow guide tube 8 consists of an inlet and multiple water distribution baffles 18. The outlet 6 can be either an upper outlet or a side outlet of the reactor. The upper outlet type is a bottom-in, top-out structure used to remove bubbles generated during the electrolysis process.

[0041] like Figure 3 As shown, specifically, the anode and cathode plates 3 include multiple cathode plates and anode plates, with two cathode plates respectively set at both ends of the sewage treatment module, and the remaining cathode plates and multiple anode plates arranged alternately. The number of anode plates and cathode plates can be flexibly set according to different treatment efficiencies.

[0042] Specifically, a trapezoidal extension 5 is provided on the upper part of both the cathode plate and the anode plate. A circular hole is provided on the trapezoidal extension 5. Two adjacent anode plates and cathode plates are electrically connected through two circular holes via a conductive plug 4.

[0043] like Figure 3 As shown, specifically, the dimensions of the anode plate and the cathode plate are 300 mm × 82 mm, or other dimensions. The substrate of the anode plate is selected from niobium-based or tantalum-based metal substrates or silicon-based substrates, and the substrate of the cathode plate is selected from titanium-based substrates. The thickness of the substrate ranges from 0.5 to 2 mm.

[0044] The anode plate is a double-sided coated electrode, and the electrode coating material on the anode plate is boron-doped diamond. The thickness of the electrode coating material is 1-20 μm, and the maximum current density is 500 Ma / cm2. The cathode plate is an uncoated titanium-based metal electrode.

[0045] like Figure 2 and Figure 4 As shown, specifically, the two terminals 2 located at the positive and negative poles are fastened to the flange cover plate 1 by hexagonal nuts 9. A flat washer 10, a separating sleeve 11, a sealing ring 12, and an insulating washer 13 are sequentially arranged between the hexagonal nut 9 and the flange cover plate 1 for isolation and sealing.

[0046] Specifically, hexagonal head bolt holes 17A are provided on the upper, middle and lower parts of the anode plate and the cathode plate. Multiple cathode plates and multiple anode plates are connected by multiple hexagonal head bolts 17 through multiple hexagonal head bolt holes 17A, which are used to fix and combine multiple anode plates and multiple cathode plates to form an integrated water treatment electrode module.

[0047] like Figure 2 As shown, specifically, multiple water distribution baffles 18 are arranged in different forms inside the water inlet. The arrangement of the multiple water distribution baffles 18 includes square openings with square holes, round holes with square holes, and large square holes with small square holes inside. The water inlet is sealed and isolated from the main water processor body 7 by flange sealing gaskets 14 and sealing strips 15.

[0048] like Figure 2 and Figure 4 As shown, specifically, threaded holes B are provided at the top, bottom, and two trisections of the anode and cathode plates. The water treatment electrode module is connected to the pressure-bearing shell through multiple hexagonal head bolts 17 through holes B.

[0049] Specifically, the pressure-bearing outer shell is a cylindrical shell made of stainless steel or fiber-wound fiberglass, and the inner lining of the pressure-bearing outer shell is made of polyvinyl chloride (PVC).

[0050] like Figure 2 As shown, specifically, the pressure-bearing shell, the water treatment electrode assembly, and the hydraulic uniformly distributed guide cylinder 8 are all connected and locked by flanges. The insertion ports of the water treatment electrode assembly and the pressure-bearing shell are both outer circles and inner squares to better fix the water treatment electrode assembly. The water treatment electrode assembly is inserted into the pressure-bearing shell to form a complete electrochemical treatment device.

[0051] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. An electrochemical water treatment device based on BDD electrode assembly, comprising a water treatment electrode assembly, a pressure shell and a water uniform distribution guide cylinder (8), characterized in that, The water treatment electrode assembly is composed of anode and cathode plates (3), conductive through pins (4), terminal posts (2) and flange upper cover plates (1), the top of the flange upper cover plate (1) is provided with an outer square screw block (16), the anode and cathode plates (3) include a plurality of cathode plates and anode plates, the pressure-bearing shell is composed of anode and cathode side flow guide plates, water outlets (6) and main water treatment device bodies (7), the water distribution guide cylinder (8) is composed of a water inlet and a plurality of water distribution baffles (18), and the plurality of water distribution baffles (18) are arranged in different forms in the water inlet.

2. An electrochemical water treatment device based on a BDD electrode assembly according to claim 1, characterized in that, Two of the cathode plates of the anode and cathode plates (3) are arranged at two ends of the sewage treatment module respectively, and the remaining cathode plates and anode plates are arranged in an interlaced manner.

3. An electrochemical water treatment device based on a BDD electrode assembly according to claim 2, characterized in that, The upper parts of the cathode plates and anode plates are provided with trapezoidal extensions (5), circular holes are formed in the trapezoidal extensions (5), and two adjacent anode plates and cathode plates are electrically connected through the conductive through pins (4) by using the two circular holes.

4. An electrochemical water treatment device based on a BDD electrode assembly according to claim 3, characterized in that, The base materials of the anode plates are selected from niobium-based or tantalum-based metal base materials or silicon-based materials, and the base materials of the cathode plates are selected from titanium-based materials, and the thickness of the base materials ranges from 0.5 to 2 mm. The anode plate is a double-sided coated electrode, the electrode coating material on the anode plate is boron-doped diamond, the thickness of the electrode coating material is 1-20 μm, and the current density is up to 500 Ma / cm 2 The cathode plate is a non-coated titanium-based metal material electrode.

5. An electrochemical water treatment device based on a BDD electrode assembly according to claim 4, characterized in that, The two terminal posts (2) between the positive electrode and the negative electrode and the flange upper cover plate (1) are fastened and connected through a hexagonal nut (9), and the hexagonal nut (9) and the flange upper cover plate (1) are sequentially provided with a flat washer (10), a spacer sleeve (11), a sealing ring (12) and an insulating washer (13) for isolation and sealing.

6. An electrochemical water treatment device based on a BDD electrode assembly according to claim 5, characterized in that, The upper, middle and lower parts of the anode plates and cathode plates are provided with hexagonal head bolt (17) holes A, a plurality of hexagonal head bolts (17) are used to connect a plurality of hexagonal head bolt (17) holes A between a plurality of cathode plates and a plurality of anode plates, so as to fix and combine the plurality of anode plates and the plurality of cathode plates to form an integrated water treatment electrode module, and the distance between the anode and the cathode is about 2 mm.

7. An electrochemical water treatment device based on a BDD electrode assembly according to claim 6, characterized in that, The arrangement forms of the plurality of water distribution baffles (18) include square holes, round holes, large square holes and small square holes in large square holes, and the water inlet and the main water treatment device body (7) are sealed and isolated by the flange sealing gasket (14) and the sealing rubber strip (15) near the water inlet.

8. An electrochemical water treatment device based on a BDD electrode assembly according to claim 7, characterized in that, The upper, bottom and two trisections of the anode plates and cathode plates are provided with threaded holes B, and the water treatment electrode module is connected with the pressure-bearing shell by using a plurality of hexagonal head bolts (17) through a plurality of hexagonal head bolts (17) holes B.

9. An electrochemical water treatment device based on a BDD electrode assembly according to claim 8, characterized in that, The pressure-bearing shell is a cylindrical shell made of stainless steel or fiber-wound glass steel, and the pressure-bearing shell is lined with an inner lining layer made of polyvinyl chloride (PVC).

10. An electrochemical water treatment device based on a BDD electrode assembly according to claim 9, characterized in that, The pressure-bearing shell, the water treatment electrode assembly and the water distribution guide cylinder (8) are connected and locked by flanges, and the sockets of the water treatment electrode assembly and the pressure-bearing shell are outer circles with square shapes.

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