A kind of method of regeneration and utilization of water-based paint cleaning agent waste liquid

Abstract

The invention discloses a method for recycling water-based paint detergent waste liquid. The method comprises the following steps: pre-treating the water-based paint detergent waste liquid, sorting, removing foreign matters, adding an additive A and an additive B, and producing demulsification reaction to form a mixture of paint slag and a solution; after the waste liquid is completely subjected to the demulsification reaction, feeding the waste liquid into a filtering system, performing solid-liquid separation, and completely separating the solution from the paint slag; performing harmless treatment on the paint slag; performing solvent accumulation on the solution, and separating a small part of water from most of a solvent mixture; treating the separated wastewater, discharging by standard, performing solvent purification on the solvent mixture, treating the separated wastewater and discharging by standard. According to the method, valuable ingredients in the waste liquid can be recycled and the rest wastewater is treated as conventional wastewater; the wastewater treatment difficulty is greatly lowered; the method is safe and environment-friendly.

Description

technical field

[0001] The invention relates to the technical field of recovery and resource utilization of aqueous paint cleaning agent waste liquid. Background technique

[0002] In recent years, the state has gradually increased the requirements for environmental protection and resource utilization in various industries, and vigorously advocated energy conservation, emission reduction, and green manufacturing. The pressure on the prevention and control of volatile organic compounds (VOC) in the coatings industry is huge, and it is imminent to reduce VOC emissions.

[0003] With the promulgation of the “Twelfth Five-Year Plan for Joint Prevention and Control of Air Pollution in Key Areas”, the “Access Management Rules for Passenger Vehicle Manufacturers and Products” (2011 No. 37) was officially implemented on January 1, 2012, which stipulates that Passenger car manufacturers must meet the "Access Conditions and Review Requirements for Passenger Car Manufacturers" (referr...

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