Ozone generator for use in membrane electrode electrolysis

Abstract

The invention discloses an ozone generator for use in membrane electrode electrolysis, which comprises a proton exchange membrane (2), an anode catalyst layer (3), an anode microporous plate (4), a deflector (5) and a cathode structure (1). The electrolyzing ozone generator is characterized in that: the ozone generator is provided with a frame body (6); a frame body seal groove (11) is arranged in the frame body (6); a sealing device (7) is arranged in the frame body seal groove (11); and the frame body (6) and the cathode structure (1) are tightly fixed through screws (9), so that the sealing device (7) is in close contact and seal with the proton exchange membrane (2), the anode catalyst layer (3) and the frame body (6) completely. The electrolyzing ozone generator has simple structure, low cost and excellent sealing performance, is easy to implement industrial-scale production, ensures that the electrolyzing ozone generator can maintain the excellent sealing property after running for a long time, so that the electrolyzing ozone generator generates stable ozone generating capacity to achieve the stable performance.

Description

Technical field: [0001] The invention relates to a membrane electrode electrolytic ozone generator using pure water as a raw material, belonging to the technical field of electrolytic ozone generators. Background technique: [0002] At present, the electrolytic ozone generator with pure water as raw material has various structures, for example: the utility model name of the patent No. ZL200520113829.9 proposed by the inventor to the Chinese Patent Office is "an anode structure of an electrolytic ozone generator" utility model patents. There is also a Chinese patent application No. 97122126.X, the invention patent of which is called "electrolytic ozone generator". [0003] Above-mentioned structure has following shortcoming: [0004] 1. Ozone is extremely oxidative and corrosive. During operation, the large-volume sealing device is in direct contact with ozone. Because of its large surface area, it is more likely to be oxidized and corroded by ozone. After a long period of ...

AI Technical Summary

Problems solved by technology

[0004] 1. Ozone is extremely oxidative and corrosive. During operation, the large-volume sealing device is in direct contact with ozone. Because of its large surface area, it is more likely to be oxidized and corroded by ozone. After a long period of operation, the physical characteristics of the sealing device will change. Aging, the sealing performance decreases, and then the seal fails, causing the gas produced and raw water to leak

[0005] 2. Using multiple sealing devices to seal, not only increases the cost or complicates the operation process, but also cannot completely avoid being oxidized and corroded by ozone no matter how small the contact area with ozone is, resulting in seal failure

[0006] 3. After a long period of operation, the sealing device made of silicone rubber cannot resist the oxidation and corrosion of high-concentration ozone, and will harden and lose elasticity due to rapid aging, resulting in seal failure

[0007] 4. After fastening, the fastening force simultaneously provides the two pressures required for the sealing device to deform and seal and the anode catalyst layer to compress the proton exchange membrane, because the force required to deform and seal the sealing device and the anode catalyst layer compress the proton exchange The force required by the membrane is not the same, which will cause the other side to be too large or too small, which will affect the sealing performance or the pressing force between the anode catalyst layer and the proton exchange membrane, resulting in unstable performance of the membrane electrode electrolytic ozone generator. The reduction in ozone production

[0008] 5. After running, the thickness of the anode catalyst layer will gradually become thinner, and after the thickness becomes thinner, the fastening pressure plate cannot continue to provide sufficient pressure, nor can it quickly compensate for the pressure lost due to the thinner thickness, directly using The anode structure of the electrolytic ozone generator is loose, and the pressing force between the anode catalyst layer and the proton exchange membrane is insufficient, which reduces the ozone production of the membrane electrode electrolytic ozone generator

[0009] 6. Conventional cathode structures include cathode fixing plates, anti-corrosion sheets, frames, deflectors, sealing devices, anode microporous plates, cathode catalyst layers, etc. Therefore, there are many types of parts, which increase the complexity of production and assembly, thereby affecting product reliability. lead to higher production costs

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