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Method for recycling water-based paint detergent 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., can solve the waste of available resources, high requirements for equipment materials, and secondary pollution of the environment and other issues to achieve the effect of saving labor, reducing processing difficulty, and reducing equipment requirements

Active Publication Date: 2014-12-24
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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  • Method for recycling water-based paint detergent waste liquid

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Embodiment 1

[0035] The invention discloses a method for recycling the waste liquid of a water-based paint cleaning agent. The waste liquid of the water-based paint cleaning agent is pretreated to classify it, and after removing foreign matter, additives A and B are added to carry out demulsification reaction to form paint residue Mixture with solution; after the demulsification reaction of the waste liquid is complete, it enters the filtration system for solid-liquid separation to completely separate the solution and paint residue; the paint residue is sent to the WRS-OR organic waste (resource) utilization system for harmless treatment ; The solution enters the disposal for solvent enrichment, so that a small part of the water is separated from most of the solvent mixture; the separated wastewater is discharged after wastewater treatment to reach the standard, and the solvent mixture enters the distillation treatment for solvent purification. Set the temperature and time to separate the sol...

Embodiment 2

[0037] As the best embodiment of the present invention, the steps are:

[0038] 1. Primary selection of waste liquid: remove impurities from the waste liquid of water-based paint cleaner, such as cleaning rags and other debris.

[0039] 2. Demulsification reaction:

[0040] 2.1 First, add additive A to the waste liquid of the water-based paint cleaning agent, stir evenly at room temperature, quickly and effectively demulsify the waste liquid, forming a mixture of paint residue and solution; add additive B after the solid-liquid mixture is completely separated to adjust the pH of the material .

[0041] 2.1.1 Function of Additive A: The stability of the dispersed particles of the waste liquid of paint cleaning agent is poor, and it is more sensitive to shearing force, heat and pH value. According to the quality of the waste liquid at room temperature: Additive A=100: (1.5~5) Compared with, it destroys the stability of dispersed particles, breaks the particles and separates them to for...

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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

[0001] Technical field [0002] The invention relates to the technical field of recovery and resource utilization of water-based paint cleaning agent waste liquid. Background technique [0003] In recent years, the state has gradually increased the environmental protection and resource utilization requirements of various industries, and vigorously advocated energy conservation, emission reduction, and green manufacturing. The coating industry is under great pressure to prevent and control volatile organic compounds (VOC), and it is urgent to reduce VOC emissions. [0004] With the "Twelfth Five-Year Plan for Air Pollution Joint Prevention and Control in Key Areas" was promulgated, the "Passenger Car Manufacturers and Product Access Management Rules" (2011 No. 37) was formally implemented on January 1, 2012, which stipulated Passenger car manufacturers must meet the "Access Conditions and Review Requirements for Passenger Car Manufacturers" (referred to as "Access Conditions"), whic...

Claims

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Application Information

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Patent Type & Authority Applications(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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