Membrane electrode electrolysis ozone generator and preparation process thereof

Abstract

The invention provides a membrane electrode electrolysis ozone generator and a preparation process thereof. The membrane electrode electrolysis ozone generator comprises a positive ion exchange membrane, a cathode structure and an anode structure, wherein the cathode structure and the anode structure are respectively arranged at two sides of the positive ion exchange membrane. The membrane electrode electrolysis ozone generator is characterized in that a sealing ring is arranged on a cathode flow guide-fastening plate; a cathode micropore plate is put into the sealing ring to be tightly attached to the cathode flow guide-fastening plate; a cathode catalyst is put into the sealing ring to be attached to the cathode micropore plate; the cathode structure, the positive ion exchange membrane and the anode structure are fastened into a whole by fastening elements. The cathode catalyst is a cathode catalyst particle layer formed by Ti2O3 particles or Ti2O3 particle and isolate particle mixtures; the material cost of the cathode catalyst of the membrane electrode electrolysis ozone generator is reduced. After the tight pressing by force, the contact of the fastened cathode catalyst particle layer and the positive ion exchange membrane is more uniform; the problem of current distribution nonuniformity of the membrane electrode electrolysis ozone generator is solved; the service life ofthe membrane electrode electrolysis ozone generator is effectively prolonged.

Description

technical field [0001] The invention belongs to the technical field of electrochemical preparation of ozone, and relates to a cathode catalyst structure and a process of a membrane electrode electrolytic ozone generator, in particular to a membrane electrode electrolytic ozone generator and a preparation process thereof. Background technique [0002] Ozone has been used by humans for more than 100 years, and it will be used more widely and deeply in the future. [0003] There are several ways to artificially prepare ozone. Generally, there are two types of methods used in practice: the high-voltage corona method using air or oxygen as raw material, and the electrochemical electrolysis method using deionized water as raw material. [0004] The membrane electrode electrolytic ozone generator is a specific product of the electrochemical electrolysis method. [0005] The membrane electrode electrolytic ozone generator uses deionized water as raw material, the cathode electrolys...

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Problems solved by technology

[0024] 1. The cathode catalyst uses precious metal platinum, which has high material cost. The preparation of platinum carbon powder into an "independent" diaphragm is manual operation, and the consistency of the diaphragm quality is difficult to control; the process of self-made carbon-supported platinum catalyst is complicated

[0025] 2. In more than ten years of long-term production and practice, it was found that the cation exchange membrane partially "breaks down", and the service life of the generator is relatively short, generally 3000-5000 hours

Due to the above shortcomings, the membrane electrode area of ​​the existing membrane electrode electrolysis ozone generator is also difficult to reach 16cm 2 Above, so that the product specifications and application range of the membrane electrode electrolytic ozone generator are affected

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