A novel three-dimensional electrode structure for electrocatalytic treatment of water-polluted wastewater

Abstract

The utility model relates to the technical field of wastewater treatment, and discloses a novel three-dimensional electrode structure for electrocatalytic treatment of water-polluted wastewater, including: a plurality of anode groups and cathode groups arranged alternately and spaced apart; a frame group, which can be detachably loaded with anode groups and cathode groups; a power supply, wherein the positive and negative electrodes are electrically connected to the anode groups and cathode groups, respectively. The novel three-dimensional electrode structure for electrocatalytic treatment of water-polluted wastewater, the anode groups and cathode groups arranged alternately and spaced apart can produce a more uniform electric field distribution, which helps to improve the current efficiency between electrodes, thereby accelerating the degradation rate of pollutants, and can increase the electrode surface area in conjunction with the particle electrode structure, provide more active sites, help improve the mass transfer process of electrolytes and pollutants on the electrode surface, reduce the thickness of the diffusion layer, and improve the removal efficiency and rate of COD under the double-layer action based on the uniform electric field distribution and optimized mass transfer process, and help reduce energy consumption and reduce operating costs.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a novel three-dimensional electrode structure for electrocatalytically treating polluted wastewater. Background Art

[0002] Industrial wastewater is usually highly toxic, biodegradable and potentially carcinogenic. If it is not treated and discharged directly into the water, it will pollute the water environment and the ecological environment. The degradation of organic pollutants has become a major challenge facing the current environmental protection field.

[0003] In measuring the degree of water pollution, chemical oxygen demand (COD) is one of the important parameters for measuring the degradation of organic pollutants. Specifically, it refers to the total amount of oxygen consumed when the reducing substances in the water sample are oxidized under certain conditions. It reflects the content of organic matter in the water.

[0004] In order to degrade the chemical oxygen demand (COD) in wastewater, a larger aeration tank is usually required, and the wastewater needs to stay in the aeration tank for a longer time. With the increase in wastewater discharge and the reduction of the treatment and emission indicators of chemical oxygen demand (COD) (≤60mg / L), the original treatment unit can meet the requirements, but the chemical oxygen demand (COD) index after treatment by the aeration tank unit cannot meet the requirements, because the chemical oxygen demand (COD) in these wastewaters is mostly inorganic COD, which is difficult to degrade through aeration. The current methods for reducing chemical oxygen demand (COD) include wet catalytic oxidation, ozone oxidation, photocatalytic oxidation, activated carbon adsorption, ordinary electrocatalytic oxidation and other technologies. Although the technical indicators can meet the standards, the treatment efficiency is low and the operating costs are high.

[0005] Therefore, a new three-dimensional electrode structure for electrocatalytic treatment of water-polluted wastewater is proposed to solve the above-mentioned problems. Utility Model Content

[0006] 1. Technical issues to be solved

[0007] In view of the shortcomings of the prior art, the utility model provides a novel three-dimensional electrode structure for electrocatalytic treatment of water-polluted wastewater, which has the advantages of good treatment effect, etc., and solves the problem that the chemical oxygen demand (COD) index of the existing aeration tank unit treatment cannot meet the requirements, because the chemical oxygen demand (COD) in these wastewaters is mostly inorganic COD, which is difficult to degrade through aeration. The current methods for reducing chemical oxygen demand (COD) include wet catalytic oxidation, ozone oxidation, photocatalytic oxidation, activated carbon adsorption, ordinary electrocatalytic oxidation and other technologies. Although the technical indicators can meet the standards, the treatment efficiency is low and the operating costs are high.

[0008] (II) Technical solution

[0009] The utility model solves the above technical problems with the following technical solutions: A novel three-dimensional electrode structure for electrocatalytic treatment of water-polluted wastewater, comprising:

[0010] A plurality of anode groups and cathode groups arranged alternately and spaced apart;

[0011] A frame assembly, detachably loaded with an anode assembly and a cathode assembly;

[0012] A power source, wherein the positive and negative electrodes are electrically connected to the anode group and the cathode group respectively;

[0013] The anode group and the cathode group both include an electrode body, a particle electrode and an insulator. The particle electrode is filled in the insulator, and the electrode body is inserted in the particle electrode.

[0014] The beneficial effects of the utility model are:

[0015] The three-dimensional electrode structure of the new electrocatalytic treatment of polluted wastewater, the alternating and spaced anode and cathode groups, can produce a more uniform electric field distribution, which helps to improve the current efficiency between electrodes, thereby accelerating the degradation rate of pollutants. The particle electrode structure can increase the electrode surface area, provide more active sites, help improve the mass transfer process of electrolytes and pollutants on the electrode surface, and reduce the thickness of the diffusion layer. Based on the uniform electric field distribution and optimized mass transfer process, the double-layer effect improves the COD removal efficiency and rate, and helps to reduce energy consumption and operating costs. The detachable frame group allows the electrode group to be easily replaced or upgraded. This modular design facilitates system maintenance and expansion, and improves the flexibility and adaptability of the system.

[0016] On the basis of the above technical solution, the present invention can also be improved as follows.

[0017] Furthermore, the frame group includes a plurality of frames, the frames are hollowed out, and the frames are made of plastic or metal treated with acid and alkali resistance.

[0018] Furthermore, the particle electrode is at least one of activated carbon and a catalyst, and the catalyst contains iron-based and aluminum-based or one of them.

[0019] Furthermore, the number of electrode bodies in one anode group and cathode group is at least one.

[0020] Furthermore, the electrode body is in a shape of a rod, a strip, a plate, or a comb.

[0021] Furthermore, the electrode body in the anode group is one of graphite, graphene, titanium-based oxide, ruthenium-iridium-titanium, and the electrode body in the cathode group is one of graphite, graphene, titanium-based oxide, ruthenium-iridium-titanium, and stainless steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 It is a structural schematic diagram of the electrode body of the utility model;

[0024] Figure 3 This is a schematic diagram of the frame structure of the utility model.

[0025] In the figure: 1, anode group; 2, cathode group; 3, frame group; 4, power supply; 5, electrode body; 6, particle electrode; 7, insulator; 8, frame. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the embodiment, Figure 1-3 A novel three-dimensional electrode structure for electrocatalytic treatment of water-polluted wastewater is provided, comprising:

[0028] A plurality of anode groups 1 and cathode groups 2 are arranged alternately and spaced apart;

[0029] The alternating arrangement of the anode group 1 and the cathode group 2 can produce a more uniform electric field distribution, which helps to improve the current efficiency between the electrodes, thereby accelerating the degradation rate of pollutants;

[0030] The anode group 1 and cathode group 2 arranged at intervals also help to reduce bubbles that may be formed during the electrolysis process, thereby preventing bubbles from hindering the transfer of substances between the electrodes.

[0031] Specifically, the uniform electric field distribution and optimized mass transfer process help reduce energy consumption, as the system can operate at a lower voltage while maintaining efficient pollutant degradation;

[0032] A frame assembly 3, detachably loaded with an anode assembly 1 and a cathode assembly 2;

[0033] The detachable frame group 3 allows the electrode group to be easily replaced or upgraded. This modular design facilitates maintenance and expansion, and improves flexibility and adaptability.

[0034] A power source 4, the positive and negative electrodes of which are electrically connected to the anode group 1 and the cathode group 2 respectively;

[0035] The anode group 1 and the cathode group 2 both include an electrode body 5 , a particle electrode 6 and an insulator 7 . The particle electrode 6 is filled in the insulator 7 , and the electrode body 5 is inserted in the particle electrode 6 .

[0036] Specifically, the above structure is connected through a power supply 4, and an electric field is formed between the anode group 1 and the cathode group 2. When power is on, an oxidation reaction occurs in the anode group to oxidize the organic pollutants into harmless substances; a reduction reaction occurs in the cathode group, which helps to reduce certain difficult-to-degrade organic matter and promote the pollutants in the wastewater to undergo an electrocatalytic reaction on the electrode surface. After the electrocatalytic oxidation-reduction reaction, the organic pollutants in the wastewater are degraded, thereby reducing COD.

[0037] The particle electrode 6 is filled in the insulator 7. This structure helps to improve the stability and mechanical strength of the entire electrode. At the same time, the insulator 7 can prevent the electrode material from directly contacting the reactants or products, which may be very important for some specific reaction systems.

[0038] In addition, multiple electrode bodies 5 are inserted into the particle electrode 6. This design can ensure good electrical contact between the electrode body and the particle electrode, and is also beneficial for heat transfer and material transmission, which is very beneficial for maintaining the stability of electrode performance and extending the life of the electrode.

[0039] Furthermore, the frame group 3 includes a plurality of frames 8, the frames 8 are hollowed out, and the frames 8 are made of plastic or metal treated with acid and alkali resistance;

[0040] The hollow frame group 3 allows wastewater to flow freely between the electrodes, which helps to evenly distribute the electrolyte and prevent local concentration gradients, thereby improving the electrochemical reaction efficiency of the entire system. The hollow design can also further promote the escape of bubbles that may be formed during the electrolysis process, avoid bubbles from hindering the material transfer between the electrodes, and reduce the mass transfer resistance.

[0041] Moreover, the hollow design and material selection of the frame 8 also help to reduce the weight of the structure. If the material is properly selected, the entire system can have good corrosion resistance and is suitable for treating wastewater of different properties, including acidic or alkaline wastewater, thereby facilitating the circulation of wastewater and improving the overall stability and lifespan.

[0042] Furthermore, the particle electrode 6 is at least one of activated carbon or a catalyst, the catalyst contains iron-based and aluminum-based or one of them, and the activated carbon and the catalyst are mixed or filled in layers in the insulator 7;

[0043] The use of the particle electrode 6 not only increases the surface area, but also helps to improve the mass transfer process of electrolytes and pollutants on the electrode surface, reduces the thickness of the diffusion layer, and accelerates the reaction rate. The selection of activated carbon or iron-based and aluminum-based catalysts can improve the catalytic activity and electron transfer efficiency of the electrode, which helps to degrade harmful substances in wastewater.

[0044] Further, the electrode body in the anode group 1 is one of graphite, graphene, titanium-based oxide, and ruthenium-iridium-titanium, and the electrode body in the cathode group 2 is one of graphite, graphene, titanium-based oxide, ruthenium-iridium-titanium, and stainless steel;

[0045] The materials of the anode group 1 and the cathode group 2 can be selected based on their electrochemical stability, conductivity and catalytic performance;

[0046] Specifically, the structural design of the present application is applicable to a variety of wastewater treatment scenarios. Whether it is industrial wastewater or domestic wastewater, it can adapt to different treatment requirements by adjusting the electrode material and catalyst type. It can be applied to organic wastewater of different concentrations and types. By adjusting the electrode material and catalyst type, it can adapt to different COD degradation requirements;

[0047] Furthermore, the number of electrode bodies 5 in an anode group 1 and a cathode group 2 is at least one;

[0048] Further, the shape of the electrode body 5 is one of a rod, a strip, a plate and a comb;

[0049] The diversified shape design of the electrode body 5 can help optimize the electric field distribution between the electrodes and improve the processing efficiency.

[0050] Working principle:

[0051] Wastewater flows through the alternately arranged anode group 1 and cathode group 2. When the power supply 4 is energized, the electrode body 5 in the anode group 1 undergoes an oxidation reaction to oxidize the organic pollutants into harmless substances, and the electrode body 5 in the cathode group 2 undergoes a reduction reaction, which helps to reduce certain difficult-to-degrade organic matter. When the wastewater flows through the electrode body 5, it will flow through the particle electrode 6 located inside it. Due to the increase in the surface area of ​​the electrode, more active sites are provided to enhance the electrochemical reaction generated by the flow of wastewater. When the wastewater flows through multiple spaced anode groups 1 and cathode groups 2, the uniform electric field distribution formed therein further accelerates the degradation process of pollutants in the wastewater. After the electrocatalytic oxidation-reduction reaction, the organic pollutants in the wastewater are degraded, the COD is reduced, and the wastewater is discharged.

[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel three-dimensional electrode structure for electrocatalytic treatment of polluted wastewater, characterized in that: include: A plurality of anode groups (1) and cathode groups (2) arranged alternately and spaced apart; A frame assembly (3) detachably loaded with an anode assembly (1) and a cathode assembly (2); A power source (4), the positive and negative electrodes of which are respectively electrically connected to the anode group (1) and the cathode group (2); The anode group (1) and the cathode group (2) both comprise an electrode body (5), a particle electrode (6) and an insulator (7); the particle electrode (6) is filled in the insulator (7), and the electrode body (5) is inserted in the particle electrode (6).

2. A novel three-dimensional electrode structure for electrocatalytic treatment of polluted wastewater according to claim 1, characterized in that: The frame group (3) comprises a plurality of frames (8), the frames (8) are hollowed out, and the frames (8) are made of plastic or metal treated with acid and alkali resistance.

3. The novel three-dimensional electrode structure for electrocatalytic treatment of polluted wastewater according to claim 1 is characterized by: The particle electrode (6) is at least one of activated carbon and a catalyst, and the catalyst contains an iron base and an aluminum base or one of them.

4. A novel three-dimensional electrode structure for electrocatalytic treatment of polluted wastewater according to claim 1, characterized in that: The number of electrode bodies (5) in one anode group (1) and cathode group (2) is at least one.

5. A novel three-dimensional electrode structure for electrocatalytic treatment of polluted wastewater according to claim 1, characterized in that: The shape of the electrode body (5) is one of a rod, a strip, a plate and a comb.

6. A novel three-dimensional electrode structure for electrocatalytic treatment of polluted wastewater according to claim 1, characterized in that: The electrode body in the anode group (1) is one of graphite, graphene, titanium-based oxide, and ruthenium-iridium-titanium, and the electrode body in the cathode group (2) is one of graphite, graphene, titanium-based oxide, ruthenium-iridium-titanium, and stainless steel.

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