Coal chemical wastewater treatment device and process

Abstract

The invention relates to a coal chemical wastewater treatment device and process, belonging to the technical field of wastewater treatment. The device is sequentially provided with a flocculation reaction-sedimentation tank, a catalytic ozonation device, a biological activated carbon filter tank, an ultrafiltration unit and a reverse osmosis unit which communicate with each other along a water inlet direction, wherein the flocculation reaction-sedimentation tank adopts an integrated structure and is coupled with a dosing system connected with the flocculation reaction-sedimentation tank; the ozone catalytic oxidation device is coupled with the biological activated carbon filter tank; and the flocculation reaction-sedimentation tank is provided with image recognition equipment, and the image recognition equipment is used for recognizing and comparing floc in the flocculation reaction-sedimentation tank and feeding a result back to a chemical adding system to control a chemical adding amount. The device and the process in the invention solves the technical problem of blockage of a biological membrane in a membrane element caused by membrane element pollution due to inaccurate chemical dosage during flocculation and precipitation reaction in traditional devices and processes, reduce the dosage of ozone and bactericide, and prolong the service life of activated carbon.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and relates to a coal chemical wastewater treatment device and process. Background technique [0002] With the increasing national environmental protection standards and stricter environmental requirements, the importance of wastewater reuse has become increasingly prominent. The components of coal chemical wastewater vary with the processing technology, mainly including coal gas wastewater, coal oil wastewater, coal coke wastewater, coal methanol, and olefin wastewater. However, they all contain aromatic compounds and heterocyclic compounds. The composition of the wastewater is complex and the concentration of pollutants is high. The toxic substances of phenol and cyanide in the wastewater inhibit the activity of microorganisms. The biodegradability of the wastewater is poor and it is not easy to biodegrade. The biochemical water pollutants are mainly refractory macromolecular orga...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide a coal chemical wastewater treatment device and process to solve the technical problems of inaccurate dosage of chemicals during flocculation and precipitation reactions in traditional devices and processes, polluting membrane elements and membrane element biofilm clogging, And reduce the input of ozone and fungicides, prolong the service life of activated carbon

Images