Coating wastewater treatment system and method

Abstract

The invention belongs to the field of environmental engineering wastewater purification, and specifically relates to a coating wastewater treatment system and method. The coating wastewater treatmentsystem comprises an adjusting tank, a coagulation reaction sedimentation tank, a flocculation air flotation device, a neutral reaction tank, a water collecting tank, a hydroxyl solution generating system, a filtration adsorber and a clear water recycling tank which are connected with one another; a first dosing device is used for dosing for the coagulation reaction sedimentation tank, and a seconddosing device is used for dosing for the flocculation air flotation device. According to the coating wastewater treatment method provided by the invention, coating wastewater enters into the adjusting tank, the coagulation reaction sedimentation tank, the flocculation air flotation device, the neutral reaction tank, the water collecting tank, the hydroxyl solution generating system, the filtration adsorber and the clear water recycling tank in sequence to complete primary treatment process and deep treatment process on wastewater. The coating wastewater integral treatment equipment designed in the invention is thorough in treatment, free of secondary pollution and short in period, and the effluent quality meets wastewater recycling and up-to-standard discharge standards, so that the equipment is expected to be used for industrial treatment of coating wastewater.

Description

technical field [0001] The invention belongs to the field of environmental engineering wastewater purification, and in particular relates to a coating wastewater treatment system and method. Background technique [0002] Coating is the main part of the surface manufacturing process. It can effectively prevent rust and corrosion of construction machinery products, and beautify the appearance of the products. It has been widely used in household appliances, machine tools, machinery, electronics, automobiles, construction, aerospace and other fields. Applications. The painting process will produce a large amount of painting wastewater, mainly from the pre-treatment processes such as pre-degreasing, degreasing, surface adjustment, phosphating, passivation, etc.; Pollutants such as resins, surfactants, heavy metal ions, pigments, etc., especially electrophoresis wastewater and painting wastewater have complex components, high concentrations, and poor biochemical properties, whic...

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Problems solved by technology

[0006] The present invention is aimed at the presence of a large amount of heavy metals, petroleum, refractory organic matter and suspended matter in industrially produced coating wastewater, and aims to overcome the defects in the prior art, such as: the conventional process occupies a large area and the treatment cycle long, water quality can not meet the standard discharge and wastewater reuse, the present invention provides a new and efficient coating wastewater treatment system and method for the treatment of coating wastewater generated in the manufacturing industry by combining conventional physical and chemical methods with advanced oxidation technology

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