Bdd electrode, catalytic oxidation apparatus, and bdd electrode processing method

Abstract

The application discloses a BDD electrode, a catalytic oxidation device and a BDD electrode processing method, and the BDD electrode comprises an electrode plate body, a clamping strip assembly arranged around the periphery of the electrode plate body, the clamping strip assembly comprises a conductive clamping strip and a sealing clamping strip, and the clamping strip assembly comprises at least one conductive clamping strip; a conductive layer is arranged between the clamping strip assembly and the electrode plate body and is used for connecting the clamping strip assembly and the electrode plate body; a conductive mesh is installed in the conductive layer; a sealing layer is used for sealing the connecting position of the clamping strip assembly and the electrode plate body; and a conductive sheet is connected with the conductive clamping strip. A plurality of BDD electrodes are arranged in parallel and connected to form a negative electrode of the catalytic oxidation device, and a plurality of titanium plates are arranged in parallel and connected to form a positive electrode of the catalytic oxidation device. According to the BDD electrode, assembly difficulty is low, current distribution is uniform, sealing performance is good, packaging is simple, and processing cost can be effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of wastewater electrocatalytic oxidation treatment technology, and particularly to a BDD electrode, catalytic oxidation equipment, and a BDD electrode processing method. Background Technology

[0002] Boron-doped diamond (BDD) electrodes are prepared by in-situ growth of boron-doped diamond films on a substrate using chemical vapor deposition. These electrodes exhibit extremely high oxygen evolution potential, excellent electrocatalytic activity, and electrochemical stability. As one of the most promising technologies for treating hazardous wastewater, BDD electrodes can efficiently mineralize organic pollutants directly on the electrode surface simply by applying an electric current. Simultaneously, they can indirectly oxidize pollutants in water by generating strong oxidants such as oxygen atoms, ozone, and hydroxyl radicals through water electrolysis.

[0003] BDD electrodes are mainly divided into metal-based and non-metal-based. Metal-based BDD electrodes, represented by niobium, suffer from high production costs, easy corrosion, and easy diamond film detachment, which seriously affect the large-scale application of niobium-based BDD electrodes. Non-metal-based BDD electrodes, represented by silicon-based electrodes, are currently the only BDD electrodes with large-scale engineering applications. They have advantages such as low production costs, corrosion resistance, and stable diamond films, but they also have problems such as uneven current distribution, poor sealing, and high assembly difficulty, which leads to packaging difficulties. Summary of the Invention

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a BDD electrode that is easy to assemble, has uniform current distribution, good sealing performance, and simple packaging, which can effectively reduce processing costs.

[0005] The present invention also proposes a catalytic oxidation device having the above-mentioned BDD electrode and a method for processing the BDD electrode.

[0006] A BDD electrode according to a first aspect embodiment of the present invention includes:

[0007] Electrode body;

[0008] A retaining strip assembly is disposed around the outer periphery of the electrode plate body; the retaining strip assembly includes a conductive retaining strip and a sealing retaining strip, and the retaining strip assembly includes at least one of the conductive retaining strips;

[0009] A conductive layer is disposed between the card strip assembly and the electrode plate body for connecting the card strip assembly and the electrode plate body; a conductive mesh is installed within the conductive layer.

[0010] A sealing layer is used to seal the connection between the card strip assembly and the electrode body;

[0011] A conductive sheet is connected to the conductive strip.

[0012] The BDD electrode according to embodiments of the present invention has at least the following beneficial effects:

[0013] By providing a conductive layer on the outer periphery of the electrode body and then connecting the conductive sheet to the conductive strip, the outer periphery of the electrode body becomes conductive, effectively increasing the conductive area of ​​the electrode body. This improves the conductivity and stability of the electrode body, thereby reducing the operating voltage and operating cost when using the BDD electrode of this embodiment to electrolyze wastewater. By providing a sealing layer at the connection between the electrode body and the strip assembly, the stability of the connection between the strip assembly and the electrode body is enhanced, while also preventing corrosive liquids and gases from entering the conductive layer and corroding it. The installation method of the strip assembly is simple, effectively reducing assembly difficulty and thus reducing processing costs.

[0014] According to some embodiments of the present invention, the conductive strip is made of metal and the sealing strip is made of plastic.

[0015] According to some embodiments of the present invention, the conductive strip is provided with a first slot for the electrode body to be embedded, the width of the first slot being greater than the thickness of the electrode body;

[0016] And / or, the sealing strip is provided with a second slot for the electrode body to be embedded, the width of the second slot being greater than the thickness of the electrode body.

[0017] According to some embodiments of the present invention, the conductive layer is formed by curing conductive adhesive; the conductive adhesive contains a conductive material, which is one or more of graphite powder, copper powder, and silver powder.

[0018] According to some embodiments of the present invention, the conductive mesh is a copper mesh, and the mesh size of the conductive mesh is 30 to 150 mesh.

[0019] According to some embodiments of the present invention, the sealing layer is formed by curing one or more of glass glue, epoxy resin, and UV adhesive.

[0020] According to some embodiments of the present invention, the card strip assembly further includes a transition card strip, which is disposed at the connection between the conductive card strip and the sealing card strip, and at the connection between the conductive card strip and the sealing card strip.

[0021] According to some embodiments of the present invention, the transition strip and the sealing strip are made of the same material, and the thickness of the transition strip is greater than the thickness of the sealing strip.

[0022] According to a second aspect of the present invention, a catalytic oxidation apparatus includes an anode assembly and a cathode assembly. The anode assembly includes a plurality of the aforementioned BDD electrodes, and the cathode assembly includes a plurality of titanium plates. The plurality of BDD electrodes and the plurality of titanium plates are arranged alternately. The catalytic oxidation apparatus of this embodiment has low manufacturing difficulty and cost, and good conductivity and stability, making it easy for mass production. Furthermore, since the catalytic oxidation apparatus includes the aforementioned BDD electrodes, it possesses at least all the beneficial effects of BDD electrodes.

[0023] A BDD electrode processing method according to a third aspect of the present invention, for processing the above-mentioned BDD electrode, includes the following steps:

[0024] Conductive adhesive is evenly brushed onto the outer periphery of the electrode plate body;

[0025] Cover the conductive adhesive with a copper mesh;

[0026] Install the card strip assembly onto the electrode plate body, ensuring that the card strip assembly covers the copper mesh inside;

[0027] Apply sealant to the connection between the electrode plate body and the card strip assembly;

[0028] The conductive adhesive and the sealant are cured to form the conductive layer and the sealing layer;

[0029] Connect the conductive sheet and the conductive strip.

[0030] The BDD electrode processing method according to the present invention has fewer processing steps, lower processing difficulty, and is easy to mass-produce at low cost.

[0031] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0033] Figure 1 This is a front view of the BDD electrode according to a first aspect embodiment of the present invention;

[0034] Figure 2 for Figure 1 Schematic diagram of the structure in the AA direction;

[0035] Figure 3 This is a schematic diagram of the structure of a catalytic oxidation device according to a second aspect embodiment of the present invention.

[0036] Icon labels:

[0037] Electrode body 100;

[0038] Card strip assembly 200, conductive card strip 210, sealing card strip 220, transition card strip 230;

[0039] Conductive layer 300, conductive mesh 310;

[0040] Sealing layer 400;

[0041] Conductive sheet 500;

[0042] Titanium plate 600. Detailed Implementation

[0043] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0044] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0045] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or the order in which the indicated technical features are presented.

[0046] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0047] Reference Figures 1 to 2The BDD electrode of the first aspect of the present invention includes an electrode body 100, a retaining strip assembly 200, and a conductive sheet 500. The electrode body 100 is rectangular, and the retaining strip assembly 200 is arranged around the electrode body 100, that is, the retaining strip assembly 200 completely covers the outer periphery of the electrode body 100. The conductive sheet 500 is connected to the retaining strip assembly 200 and is used to connect to an external power source. Specifically, the retaining strip assembly 200 includes a conductive retaining strip 210 and a sealing retaining strip 220. The conductive retaining strip 210 is made of metal, preferably titanium in this embodiment; the sealing retaining strip 220 is integrally molded from plastic, and the material is one or more of PVC, PP, PPR, PE, and PTFE. The retaining strip assembly 200 includes at least one conductive retaining strip 210. In this embodiment, the retaining strip assembly 200 has only one conductive retaining strip 210 for connection with the conductive sheet 500.

[0048] It can be inferred that the number of conductive strips 210 can be determined according to the shape of the electrode body 100. For example, if the electrode body 100 is hexagonal, then an additional conductive strip 210 can be added as needed.

[0049] In an embodiment of the present invention, a conductive layer 300 is provided between the electrode plate body 100 and the card strip assembly 200, and a sealing layer 400 is provided at the connection between the card strip assembly 200 and the electrode plate body 100. Specifically, refer to... Figure 1 , Figure 2 As shown, the conductive layer 300 is formed by curing conductive adhesive; the conductive adhesive can be fluid or semi-fluid, and contains conductive materials, which are one or more of graphite powder, copper powder, and silver powder, preferably a semi-fluid conductive adhesive containing copper powder; the sealing layer 400 is formed by curing one or more of glass glue, epoxy resin, and UV glue. The conductive strip 210 has a first slot for embedding the electrode body 100, and the sealing strip 220 has a second slot for embedding the electrode body 100. The conductive adhesive is applied into the first and second slots, and the sealing adhesive is applied to the outside of the first and second slots.

[0050] In embodiments of the present invention, the width of the first slot is greater than the thickness of the electrode body 100; and / or, the width of the second slot is greater than the thickness of the electrode body 100. In this embodiment, the widths of both the first and second slots are greater than the thickness of the electrode body 100, so that the electrode body 100 can be inserted into the first and second slots; both the first and second slots are strip-shaped grooves. Specifically, the thickness of the conductive strip 210 is preferably 0.5mm to 1mm, more preferably 1mm; the width of the first slot is preferably 2mm to 4mm greater than the thickness of the electrode body 100, more preferably 3mm; the width of the two side walls of the first slot is preferably 5mm to 15mm, more preferably 10mm. Similarly, the thickness of the sealing strip 220 is preferably 0.5mm to 1mm, more preferably 1mm; the width of the second slot is preferably 2mm to 4mm greater than the thickness of the electrode body 100, more preferably 3mm; the width of the two side walls of the second slot is preferably 5mm to 15mm, more preferably 10mm.

[0051] In an embodiment of the present invention, the card strip assembly 200 further includes a transition card strip 230, which is disposed at the connection points of the conductive card strip 210 and the sealing card strip 220, and at the connection points of the conductive card strip 210 and the sealing card strip 220. Specifically, in this embodiment, since there is only one conductive card strip 210, the transition card strip 230 only needs to be disposed at the connection points of the conductive card strip 210 and the sealing card strip 220, and at the connection points of the sealing card strip 220, i.e., referring to... Figure 1 As shown, transition strips 230 are disposed at the four corners of the electrode body 100. The transition strips 230 are preferably made of PTFE material, and in order to improve the protection effect on the electrode body 100, the thickness of the transition strips 230 is preferably 1.5mm to 2.5mm.

[0052] In the embodiments of the present invention, the substrate of the electrode body 100 is one or more of monocrystalline silicon, polycrystalline silicon, silicon carbide monocrystalline, silicon carbide ceramic, silicon nitride monocrystalline, and silicon nitride ceramic, preferably polycrystalline silicon; the outer surface of the electrode body 100 can be one or more of flat plate, mesh plate, porous plate, and foam board, preferably flat plate.

[0053] In an embodiment of the present invention, a conductive mesh 310 is installed within the conductive layer 300. The conductive mesh 310 is a copper mesh with a mesh size of 30 to 150. Specifically, the copper mesh is preferably a single, seamless copper mesh, and the width of the conductive mesh 310 is greater than the thickness of the electrode body 100, that is, the width of the conductive mesh 310 extends 2 mm to 10 mm towards the thickness of the electrode body 100 on both sides; more preferably, the copper mesh has a mesh size of 50, and the width of the conductive mesh 310 extends 3 mm to 7 mm towards the thickness of the electrode body 100 on both sides.

[0054] According to the BDD electrode of the present invention, by providing a conductive layer 300 on the outer periphery of the electrode body 100 and then connecting the conductive sheet 500 to the conductive strip 210, the outer periphery of the electrode body 100 can be made conductive, effectively increasing the conductive area of ​​the electrode body 100, thereby improving the conductivity and stability of the electrode body 100, and thus reducing the operating voltage and operating cost when using the BDD electrode of this embodiment to electrolyze wastewater; by providing a sealing layer 400 at the connection between the electrode body 100 and the strip assembly 200, the stability of the connection between the strip assembly 200 and the electrode body 100 can be enhanced, and corrosive liquids and gases can be prevented from entering the conductive layer 300 and corroding the conductive layer 300; the installation method of the strip assembly 200 is simple, which can effectively reduce the assembly difficulty and thus reduce the processing cost.

[0055] Reference Figure 3 As shown, the catalytic oxidation device according to the second aspect of the present invention includes an anode assembly and a cathode assembly. The anode assembly includes a plurality of the aforementioned BDD electrodes, and the cathode assembly includes a plurality of titanium plates 600. The plurality of BDD electrodes and the plurality of titanium plates 600 are arranged alternately or in parallel. The conductive sheets 500 of the plurality of BDD electrodes are electrically connected through titanium-clad copper conductive rods, and the plurality of titanium plates 600 are also electrically connected through titanium-clad copper conductive rods. The catalytic oxidation device of this embodiment has low manufacturing difficulty and cost, and good conductivity and stability, making it easy for mass production. Furthermore, since the catalytic oxidation device includes the aforementioned BDD electrodes, it possesses at least all the beneficial effects of BDD electrodes, which will not be elaborated upon here.

[0056] It should be noted that the catalytic oxidation equipment in this embodiment is mainly used for wastewater treatment, and the catalytic oxidation equipment in this embodiment includes not only the aforementioned anode and cathode components, but also other auxiliary structures such as the electrocatalytic oxidation tank and cover plate, which are not limited in this embodiment. Furthermore, the number of titanium plates 600 in the cathode component is one more than the number of BDD electrodes.

[0057] A BDD electrode processing method according to a third aspect of the present invention, used for processing the above-mentioned BDD electrode, includes the following steps:

[0058] S1. Apply conductive adhesive evenly to the outer periphery of the electrode body 100. Specifically, place the electrode body 100 on the assembly platform and apply anti-scratch stickers to the non-assembly areas on both sides of the electrode body 100. Apply conductive adhesive of a set width and thickness to the outer periphery of the electrode body 100 with a glue gun, and then use a toothed scraper to smooth the conductive adhesive and scrape off the excess conductive adhesive to make the thickness of the conductive adhesive uniform at all positions on the outer periphery of the electrode body 100.

[0059] S2. Cover the conductive adhesive with a copper mesh; specifically, use a special molding tool to press the conductive mesh 310 into a shape that fits the electrode plate body 100, then install the conductive mesh 310, and use a pressure strip to help the conductive mesh 310 and the conductive adhesive fit tightly together.

[0060] S3. Install the clip assembly 200 onto the electrode plate body 100, ensuring that the clip assembly 200 completely covers the copper mesh. Specifically, first, inject conductive adhesive of uniform thickness into the first and second clip slots, and then install the conductive clip 210, sealing clip 220, and transition clip 230. After installing the clip assembly 200, install positioning strips on the electrode plate body 100 to assist in fixing the clip assembly 200, and at the same time, use special equipment to press the clip assembly 200 and the electrode plate body 100 together.

[0061] S4. Apply sealant to the connection between the electrode body 100 and the locking strip assembly 200. Specifically, after waiting for the set time, use a special caulking gun to apply sealant to the gap between the electrode body 100 and the locking strip assembly 200, and remove the positioning strip at the same time.

[0062] S5. Curing conductive adhesive and sealant to form conductive layer 300 and sealing layer 400; specifically, the electrode plate body 100 with sealant and conductive adhesive applied is placed in a special curing box and left for a set time until the conductive adhesive and sealant are cured. Then the cured electrode plate is stored in a special foam storage box.

[0063] S6. Connect the conductive sheet 500 and the conductive strip 210; specifically, the conductive sheet 500 and the conductive strip 210 are preferably welded; place the cured electrode body 100 on the operating table, and then weld the conductive sheet 500 to the middle position on the side of the conductive strip 210 away from the electrode body 100.

[0064] The BDD electrode processing method according to the present invention has fewer processing steps, lower processing difficulty, and is easy to mass-produce at low cost.

[0065] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0066] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A BDD electrode, characterized by, The application relates to a BDD electrode, which comprises the following components: a polar plate body; a clamping strip assembly arranged around the outer periphery of the polar plate body, wherein the clamping strip assembly comprises a conductive clamping strip and a sealing clamping strip, and the clamping strip assembly comprises at least one conductive clamping strip; a conductive layer arranged between the clamping strip assembly and the polar plate body, which is used for connecting the clamping strip assembly and the polar plate body, wherein the conductive layer is formed by curing conductive glue, and a conductive mesh is arranged in the conductive layer; a sealing layer used for sealing the joint of the clamping strip assembly and the polar plate body; a conductive sheet connected with the conductive clamping strip.

2. The BDD electrode according to claim 1, characterized by: The conductive clamping strip is made of metal, and the sealing clamping strip is made of plastic.

3. The BDD electrode according to claim 1, characterized by: The conductive clamping strip is provided with a first clamping groove for embedding the polar plate body, and the width of the first clamping groove is greater than the thickness of the polar plate body. The sealing clamping strip is provided with a second clamping groove for embedding the polar plate body, and the width of the second clamping groove is greater than the thickness of the polar plate body.

4. The BDD electrode according to claim 1, characterized by: The conductive glue comprises conductive materials, and the conductive materials are one or more of graphite powder, copper powder and silver powder.

5. The BDD electrode according to claim 1, characterized by: The conductive mesh is a red copper mesh, and the mesh number of the red copper mesh is 30-150.

6. The BDD electrode according to claim 1, characterized by: The sealing layer is formed by curing one or more of glass glue, epoxy resin and UV glue.

7. The BDD electrode according to claim 1, characterized by: The clamping strip assembly further comprises a transition clamping strip arranged at the joint of the conductive clamping strip and the sealing clamping strip, the joint of the conductive clamping strip and the conductive clamping strip, and the joint of the sealing clamping strip and the sealing clamping strip.

8. The BDD electrode according to claim 7, characterized by: The transition clamping strip and the sealing clamping strip are made of the same material, and the thickness of the transition clamping strip is greater than that of the sealing clamping strip.

9. A catalytic oxidation apparatus characterized by comprising: The application further relates to a BDD electrode assembly, which comprises an anode assembly and a cathode assembly, wherein the anode assembly comprises a plurality of BDD electrodes according to any one of claims 1-8, and the cathode assembly comprises a plurality of titanium plates, and the plurality of BDD electrodes and the plurality of titanium plates are arranged alternately.

10. A method for processing a BDD electrode for use in the BDD electrode according to claim 5, characterized by, The application further relates to a BDD electrode manufacturing method, which comprises the following steps: uniformly brushing conductive glue on the outer periphery of the polar plate body; covering a red copper mesh on the conductive glue; arranging the clamping strip assembly on the polar plate body, and ensuring that the clamping strip assembly covers the red copper mesh; punching sealing glue into the joint of the polar plate body and the clamping strip assembly; curing the conductive glue and the sealing glue to form the conductive layer and the sealing layer; connecting the conductive sheet and the conductive clamping strip.

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