A hydrogen peroxide production apparatus

Abstract

The utility model relates to chemical preparation technical field discloses a hydrogen peroxide production device, include: power supply, first cover plate subassembly, air diffusion electrode and second cover plate subassembly that set up in sequence, first cover plate subassembly with second cover plate subassembly pass through sealing piece cooperation, first cover plate subassembly with second cover plate subassembly all with power supply electricity is connected, inject electrolyte between first cover plate subassembly with air diffusion electrode. Set up like this, be favorable to simplifying the device structure, reduce cost.

Description

Technical Field

[0001] This utility model relates to the field of chemical preparation technology, and in particular to a hydrogen peroxide production apparatus. Background Technology

[0002] Hydrogen peroxide solution is an important chemical in various industrial applications, including chemical synthesis, pulp and paper making, textile bleaching, cleaning and etching, environmental protection, and consumer health applications. As a highly efficient, harmless, and residue-free oxidant, it is widely used in water sterilization and disinfection as well as in the treatment of organic pollutants. Currently, hydrogen peroxide for industrial applications is mainly produced by electrolysis or the anthraquinone process.

[0003] Compared with the traditional anthraquinone method, the electrochemical synthesis method has the advantages of being greener, more efficient, and more environmentally friendly. However, the equipment used for generating low-concentration hydrogen peroxide in traditional electrochemical methods is complex, bulky, and costly to operate, making it unsuitable for use in public places, homes, and other similar settings. Utility Model Content

[0004] The purpose of this invention is to provide a hydrogen peroxide production device that simplifies the device structure and reduces costs.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] A hydrogen peroxide production apparatus includes: a power source, a first cover plate assembly, an air diffusion electrode, and a second cover plate assembly arranged sequentially, wherein the first cover plate assembly and the second cover plate assembly are fitted together by a sealing element; both the first cover plate assembly and the second cover plate assembly are electrically connected to the power source; and an electrolyte is injected between the first cover plate assembly and the air diffusion electrode.

[0007] Preferably, the first cover plate assembly includes a first cover plate body and an anode, the anode being fixed on the first cover plate body and disposed facing the second cover plate assembly; the second cover plate assembly includes a second cover plate body and a cathode, the cathode being fixed on the second cover plate body and disposed facing the first cover plate assembly; the first cover plate body and the second cover plate body are engaged by the sealing member.

[0008] Preferably, the sealing element is a sealing ring.

[0009] Preferably, the first cover plate body is provided with a solution inlet and a solution outlet.

[0010] Preferably, a flow channel is provided on the inner side of the first cover plate body.

[0011] Preferably, the flow channel is a serpentine flow channel.

[0012] Preferably, the second cover plate body is provided with a through hole for transmitting air.

[0013] Preferably, there are multiple through holes arranged in an array; the diameter of each through hole is 2 mm.

[0014] Preferably, the electrolyte is an aqueous solution of Na2SO4.

[0015] Preferably, the air diffusion electrode is supported by a stainless steel substrate; a diffusion layer is provided on the side of the air diffusion electrode facing the anode, and a catalyst layer is provided on the side of the air diffusion electrode facing the cathode; the diffusion layer and the catalyst layer are respectively obtained by sintering carbon powder and polytetrafluoroethylene in different mass ratios.

[0016] According to the above description, the present invention discloses the following technical effects:

[0017] This utility model provides a hydrogen peroxide production device, which is made by connecting a first cover plate assembly and a second cover plate assembly through a sealing element; both the first cover plate assembly and the second cover plate assembly are electrically connected to a power source; an electrolyte is injected between the first cover plate assembly and the air diffusion electrode; the first cover plate assembly and the second cover plate assembly are connected through a sealing element; and the air diffusion electrode is set between the first cover plate assembly and the second cover plate assembly, thus reducing the need for a diaphragm. This arrangement helps to simplify the device structure and reduce costs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of an explosion of a hydrogen peroxide production apparatus provided in the embodiments of this specification;

[0020] Wherein, 1-first cover plate body; 2-solution inlet; 3-solution outlet; 4-air diffusion electrode; 5-second cover plate body; 6-power supply. Detailed Implementation

[0021] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figure 1 As shown in the embodiment of this specification, a hydrogen peroxide production apparatus is provided, including: a power supply 6, a first cover plate assembly, an air diffusion electrode 4, and a second cover plate assembly arranged sequentially. The first and second cover plate assemblies are fitted together by a sealing element, such as by screws, to achieve a detachable connection between the first and second cover plate assemblies via the sealing element. Both the first and second cover plate assemblies are electrically connected to the power supply 6. Electrolyte is injected between the first cover plate assembly and the air diffusion electrode 4. By using the sealing element to fit the first and second cover plate assemblies together, and placing the air diffusion electrode 4 between the first and second cover plate assemblies, the requirement for a diaphragm is reduced. This arrangement simplifies the apparatus structure and reduces costs.

[0023] The first cover plate assembly includes a first cover plate body 1 and an anode, the anode being fixed on the first cover plate body 1 and facing the second cover plate assembly; the second cover plate assembly includes a second cover plate body 5 and a cathode, the cathode being fixed on the second cover plate body 5 and facing the first cover plate assembly; the first cover plate body 1 and the second cover plate body 5 are fitted together by a sealing element.

[0024] The preferred sealing element is a sealing ring, which can be a standard part or made by making it from materials such as rubber, depending on actual needs; other sealing elements widely used in existing technologies can also be used.

[0025] The first cover plate body 1 is provided with a solution inlet 2 and a solution outlet 3. The solution inlet 2 is used to fill in the electrolyte, and the solution outlet 3 is used to output the hydrogen peroxide solution.

[0026] The inner side of the first cover plate body 1 is provided with a flow channel; the flow channel is formed by parallel strip-shaped protrusions spaced apart; the flow channel is serpentine in shape, which helps to reduce the flow resistance of the fluid flowing into the inner side and regulate the flow path of the fluid.

[0027] The second cover plate body 5 is provided with through holes for air transmission, allowing air to diffuse gradient towards the surface of the catalyst layer. At the surface of the catalyst layer, a two-electron oxygen reduction reaction is triggered, generating hydrogen peroxide which migrates to the electrolyte bulk. The cathode reaction is: O2 + 2(H+) + +e - →H2O2.

[0028] A water oxidation reaction occurs simultaneously at the anode, using the electrolyte in the first cover plate body 1 as the reactant to generate oxygen. The anode reaction is as follows:

[0029] H2O→0.5O2+2(H+e - ).

[0030] The number of through holes is multiple, and the multiple through holes are arranged in an array, which is conducive to gas diffusion and forms an efficient gas diffusion interface; the diameter of the through holes is preferably 2mm.

[0031] The electrolyte is an aqueous solution of Na2SO4, and the concentration of the Na2SO4 aqueous solution is preferably 50 mmol / L.

[0032] The air diffusion electrode 4 is supported by a stainless steel substrate. A diffusion layer is provided on the anode-facing side of the air diffusion electrode 4, and a catalyst layer is provided on the cathode-facing side. The diffusion layer and the catalyst layer are obtained by sintering carbon powder and polytetrafluoroethylene in different mass ratios, preferably 1:3.3 and 1.5:1 respectively. The sintering temperature is 300–400℃. The air diffusion electrode 4 has a square structure with a thickness of approximately 0.6 mm and a preferred size of 7*7 cm.

[0033] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple; relevant parts can be referred to the method section.

[0034] This document uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. Furthermore, those skilled in the art will recognize that, based on the ideas of this utility model, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A hydrogen peroxide production apparatus, characterized in that, include: The system comprises a power supply, a first cover plate assembly, an air diffusion electrode, and a second cover plate assembly arranged sequentially. The first cover plate assembly and the second cover plate assembly are fitted together by a sealing element. Both the first cover plate assembly and the second cover plate assembly are electrically connected to the power supply. An electrolyte is injected between the first cover plate assembly and the air diffusion electrode. The first cover plate assembly includes a first cover plate body and an anode, the anode being fixed on the first cover plate body and disposed facing the second cover plate assembly; the second cover plate assembly includes a second cover plate body and a cathode, the cathode being fixed on the second cover plate body and disposed facing the first cover plate assembly; the first cover plate body and the second cover plate body are engaged by the sealing element.

2. The hydrogen peroxide production apparatus according to claim 1, characterized in that, The sealing element is a sealing ring.

3. The hydrogen peroxide production apparatus according to claim 1, characterized in that, The first cover plate body is provided with a solution inlet and a solution outlet.

4. The hydrogen peroxide production apparatus according to claim 3, characterized in that, The inner side of the first cover plate body is provided with a flow channel.

5. The hydrogen peroxide production apparatus according to claim 4, characterized in that, The flow channel is serpentine in shape.

6. The hydrogen peroxide production apparatus according to claim 1, characterized in that, The second cover plate body is provided with a through hole for transmitting air.

7. The hydrogen peroxide production apparatus according to claim 6, characterized in that, The number of through holes is multiple, and the multiple through holes are arranged in an array; the diameter of the through holes is 2mm.

8. The hydrogen peroxide production apparatus according to claim 1, characterized in that, The electrolyte is an aqueous solution of Na2SO4.

9. The hydrogen peroxide production apparatus according to claim 1, characterized in that, The air diffusion electrode is supported by a stainless steel substrate; a diffusion layer is provided on the side of the air diffusion electrode facing the anode, and a catalyst layer is provided on the side of the air diffusion electrode facing the cathode.

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