A method for purifying and treating wastewater from coal chemical industry

Abstract

The invention belongs to the technical field of environmental protection, and specifically relates to a method for purifying and treating coal chemical wastewater. The method adopts a wastewater treatment system, and the wastewater treatment system includes a treatment box and a medicine box; it also includes No. 1 stirring unit, No. 2 stirring unit and Drug nozzle; the No. 1 stirring unit is used for dissolving the flocculant into the wastewater at low speed; the No. 2 stirring unit is used for dissolving the flocculant into the wastewater at high speed; the drug nozzle is used for spraying the flocculant into the treatment tank . In the low-speed stirring, the No. 1 stirring unit and the No. 2 stirring unit are complementary to stir, on the one hand, the collision area between the flocculant and the impurities in the wastewater is increased, thereby accelerating the dissolution efficiency of the flocculant and the wastewater, thereby improving the purification of the wastewater Efficiency; on the other hand, the flocculant is sprayed into the treatment tank reasonably according to the needs, so that the flocculant and the wastewater are dissolved, avoiding the waste of the flocculant, thereby improving the utilization rate of resources.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, in particular to a method for purifying and treating coal chemical wastewater. Background technique [0002] Water resources are an important material basis for the survival and development of human society. With the development of modern industry, the problem of water pollution is becoming more and more serious, especially industrial sewage due to its high concentration of organic matter, high toxicity, complex composition and difficult treatment has become the focus of social attention. [0003] Wastewater refers to the general term for water discharged from residents' activities and runoff rainwater. It includes other useless water such as domestic sewage, industrial wastewater, and primary rainwater flowing into drainage pipes and channels, and generally refers to water that is not used or has no value in use. The concentration of wastewater pollutants is high, and the orga...

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Problems solved by technology

[0007] In order to make up for the deficiencies of the prior art and aim at the problem of insufficient stirring in the original scheme, the present invention proposes a method for purifying coal chemical wastewater. The method adopts a wastewater treatment system. Unit, in the low-speed stirring, the No. 1 stirring unit and the No. 2 stirring unit are complementary to stir. On the one hand, the collision area between the flocculant and the impurities in the wastewater is increased, thereby accelerating the dissolution efficiency of the flocculant and wastewater, thereby improving the waste water. Purification efficiency; on the other hand, the flocculant is sprayed into the treatment tank reasonably according to the needs, so that the flocculant and wastewater can be dissolved, avoiding the waste of flocculant, thereby improving the utilization rate of resources

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