Electrolytic and catalytic oxidation reaction device and processing method based fluidized bed

Abstract

The invention relates to electrolytic and catalytic oxidation reaction device and treating method based on a fluidized bed. The processing method fully utilizes higher electrical conductivity of waste water with salt, and organically integrates electrolytic oxidation, catalytic oxidation and the fluidized bed into a whole. Various organic pollutants in wastewater are deeply oxidized under the catalysis of free radicals and catalyst particles which are produced by the electrolysis of a electrode under the three-dimensional catalysis of an anode, a cathode, catalyst particles and the like, and thus, the organics which are difficult to biodegrade can be removed from wastewater to a deep extent. The reaction device and the method can be used for treating wastewater with low salt concentration, such as wastewater from circulating water plants and power stations of oil refining enterprises, chemical enterprises, and the like and tail water of wastewater reverse osmosis desalting systems, and the wastewater treated by the device and the system meets the requirement of direct discharge, or can be used as high quality source water for double-membrane law deep desalination recycling. In addition, compared with the traditional three-phase fluidized bed, the device and method is easier to operate and control in soli-liquid-gas three seperation.

Description

technical field [0001] The invention relates to a fluidized bed electrolytic catalytic oxidation reaction device and treatment method, which is used for the treatment of salty sewage in oil refining, chemical industry and other enterprises, especially for circulating water station sewage, power station sewage and waste water with relatively low pollutant content Reverse osmosis desalination tail water treatment. Background technique [0002] In oil refining, chemical industry and other industries, there is usually a kind of salty wastewater called "assumed clean water", such as sewage from circulating water field, acid-base wastewater discharged from ion exchange resin regeneration in chemical water station, sewage from steam boiler, etc. Circulating water sewage occupies the vast majority. "Assumed clean water" because of its relatively low pollutant content, such as COD ≤ 60mg / L, petroleum ≤ 5mg / L, NH 3 -N≤10mg / L, most of them have not been treated in sewage treatment pl...

AI Technical Summary

Problems solved by technology

There are currently two main problems with this treatment method: the first is that the organic pollutants in the source water cannot be effectively controlled, and it is easy to cause pollution of the ultrafiltration membrane and reverse osmosis membrane, which makes the treatment process unable to run for a long time; the second is that The concentration of COD in the wastewater of reverse osmosis concentrate is high, which cannot meet the discharge requirements of water quality standards

[0007] Based on the above analysis, in the current situation of a high proportion of sewage reuse and increasingly stringent drainage control standards, there are no effective treatment measures for low-concentration saline wastewater such as circulating water sewage from petrochemical enterprises and tail water from sewage reverse osmosis desalination treatment.

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