Flowing light discharge plasma oxygenized sulfite

Abstract

The present invention discloses one industrial method of oxidizing four-valent sulfide with non-thermal plasma in the co-existence of OH, H, O, N and other high chemical activity free radicals. High voltage power source is applied to the discharge system of streamer discharge plasma reactor to form the streamer discharge plasma reaction area while sulfite solution is fed into the reaction area, and the four-valent sulfur is oxidized into six-valent sulfur during the streamer discharge oxidizing process. Meanwhile, atomizing mode, bubbling mode or high specific surface area electrode is used to increase the gas-liquid mass transfer interface and raise the mass transfer efficiency. Compared with conventional method, the present invention has high oxidization rate, low power consumption, short processing time, small covered area, less ammonia leakage and other advantages.

Description

Technical field:

[0001] The invention relates to the technical field of plasma chemical industry, in particular to the technical field of oxidizing tetravalent sulfides in liquid or slurry by relying on streamer discharge to generate non-thermal plasma to oxidize the tetravalent sulfide in an oxygen-containing gas environment. Background technique:

[0002] As everyone knows, conventional treatment methods for oxidizing tetravalent sulfur solutions, such as current GE, Bischof and NKK companies, all use compressed air liquid phase bubbling (without discharge catalysis). This method has a large reactor and a long reaction time. In terms of application, it has its considerable limitations. Invention content:

[0003] The object of the present invention is to provide an industrial treatment technology for oxidizing tetravalent sulfides with small reactor, short reaction time, and the application of streamer discharge plasma under the condition of multi-phase coexistence. [...

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