Three-phase reactor used for Fenton reaction

Abstract

The invention discloses a three-phase reactor used for a Fenton reaction. The reactor comprises a reactor main body which is provided with a flow guiding cylinder therein; an air guiding device at the bottom therein; an air inlet at the bottom wall thereof, the air inlet being connected with an air pump; a water inlet at a bottom sidewall thereof; and a water outlet at an upper part thereof. The three-phase reactor used for processing wastewater can improve contact efficiency of a catalyst and an oxidant, and thus improve mineralization value of organic matters in the wastewater, and has advantages of small generating amount of iron filings and low catalyst consumption amount. According to the invention, removal rate of CODcr of the wastewater is more than 77 %, a CODcr concentration of the outlet water can be reduced to about 110 mg / L, removal rate of chroma is more than 95 % and the chroma of the outlet water is about 50.

Description

technical field [0001] The invention relates to a waste water treatment device, in particular to a device for Fenton oxidation reaction in waste water treatment. Background technique [0002] At present, with the rapid development of my country's industry, a large amount of industrial sewage, especially industrial sewage containing high concentrations of refractory organic matter, has brought great pressure to the water environment. For these wastewaters, the commonly used treatment methods are mainly physical methods such as coagulation sedimentation and air flotation plus some conventional biological treatment methods such as activated sludge method. These conventional methods have certain effects in the treatment of medium and low concentration organic sewage, but these methods have the disadvantages of large amount of chemicals used, low efficiency of pollutant removal, high comprehensive use cost, etc., and it is difficult to meet my country's industrial wastewater disc...

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Problems solved by technology

[0004] Compared with the traditional reaction system, the existing solid-liquid two-phase reactor Fenton reaction system can indeed improve the reaction efficiency and reduce the output of iron sludge, but due to the potential external diffusion effect, there is a limit to the mineralization of organic matter, especially for the production of Wastewater containing refractory polymer organic matter such as pulp and paper, it is difficult to completely oxidize and remove the organic matter directly

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