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

A water-based paint and cleaning agent technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. problems, to achieve the effect of reducing processing difficulty, saving labor, and running clean and smooth

Active Publication Date: 2016-04-27
CHENGDU YUANYONG TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although liquid waste can be completely treated after incineration, it causes a waste of available resources, and the process requirements are strict, and the requirements for equipment materials are high. secondary pollution

Method used

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

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Embodiment 1

[0034] The invention discloses a method for recycling waste water-based paint cleaning agent. The water-based paint cleaning agent waste liquid is pretreated to classify it, remove foreign matter, add additive A and additive B, and carry out demulsification reaction to form paint slag The mixture with the solution; the waste liquid enters the filtration system after the demulsification reaction is complete, and the solid-liquid separation is carried out to completely separate the solution and the paint residue; the paint residue is sent to the WRS-OR organic waste (recycling) utilization system for harmless treatment ;The solution enters the disposal for solvent enrichment, so that a small part of water is separated from most of the solvent mixture; the separated wastewater is discharged up to the standard after wastewater treatment, and the solvent mixture enters the distillation device for solvent purification, and the temperature and time are set to separate the solvent from ...

Embodiment 2

[0036]As the best implementation mode of the present invention, its steps are:

[0037] 1. Primary selection of waste liquid: remove impurities in the waste liquid of water-based paint cleaning agent, such as cleaning rags and other sundries.

[0038] 2. Demulsification reaction:

[0039] 2.1 First add additive A to the waste liquid of water-based paint cleaning agent, stir evenly at room temperature, quickly and effectively demulsify the waste liquid, and form a mixture of paint slag and solution; add additive B after the solid and liquid are clearly mixed to adjust the pH of the material .

[0040] 2.1.1 Function of Additive A: The dispersed particles of paint cleaning agent waste liquid have poor stability and are sensitive to shear force, heat, and pH value. At room temperature, according to the mass of waste liquid: Additive A=100: (1.5~5) Ratio, destroying the stability of the dispersed particles, demulsifying the particles to form an irreversible floc, so that the res...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C07C41/46C07C43/13
Inventor 肖菊花刘剑陶中林刘源陈俊何洪卢小冬
Owner CHENGDU YUANYONG TECH DEV
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