Reuse treatment method for industrial wastewater from refrigerator compressor factory

Abstract

The invention relates to a reuse treatment method for industrial wastewater from a refrigerator compressor factory. Firstly, independently collected emulsified bath solution wastewater is acidified and demulsified, free oil and emulsified oil in the wastewater are eliminated, and then the wastewater is subjected to Fe<2+> / H2O2 oxidation, the effluent pH is 7-8, and then coagulant aid is added forcoagulation sedimentation, and organic matter, metal salt and SS are removed, so that emulsified bath solution water is obtained. Subsequently, the emulsified bath solution water and the independently collected rinsing wastewater are uniformly mixed according to the ratio of 1:20-30 to serve as the source water for micro filter membrane treatment; the source water is subjected to air floatation oil separation dephosphorization, coagulation and activated carbon adsorption to obtain water with the pH value of 9-10 under micro filtration, and then the water under micro filtration enters the micro filter membrane, so clean water is obtained; and the clean water and tap water are mixed according to the ratio of 1:1-2, are subjected to filtering by activated carbon and 5um precise filtration and enter a reverse osmosis membrane, and then pure water is obtained after desalination, and the pure water can be reused for production. With the reuse treatment method, the water quality of reused water is stable and can reach the standard of pure water used by enterprises for production, the water is reused for a product line, so that the wastewater discharge of the enterprises is greatly reduced, the use volume of tap water is saved, and remarkable economical and social benefits are achieved.

Description

technical field [0001] The invention relates to a recycling treatment method for industrial waste water of a refrigerator compressor factory. It belongs to the technical field of waste water reuse. technical background [0002] The manufacturing process of refrigerator compressors involves many processes including steel pickling and purification, mechanical cutting, metal phosphating, surface adjustment, electrophoretic spraying, metal heat treatment, electroplating, surface treatment, and cleaning. Each production and processing process often requires a large amount of tap water or pure water, ultrapure water to participate, and also produces a large amount of waste water. The wastewater produced by the manufacturing and processing of refrigerator compressors has different components due to different production processes. Among them, there are many waste water pollutants produced in the process of mechanical cutting, metal phosphating degreasing, electroplating, rust prev...

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Problems solved by technology

There is also no report on the reuse of wastewater from refrigerator compressor manufacturing enterprises for production

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