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Method and system for treating waste solvent of water-based paint

A treatment method and a treatment system technology, applied in the field of water-based paint waste solvent treatment, can solve the problems of numerous steps and slow operation, and achieve the effects of reducing COD, improving efficiency and maintenance costs

Active Publication Date: 2021-06-11
FAW VOLKSWAGEN AUTOMOTIVE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing treatment methods have many steps and slow operation. Therefore, a simple treatment of the waste solvent can be done to greatly reduce the substances that do not belong to the conventional treatment (paint waste) in the waste solvent before treatment.

Method used

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  • Method and system for treating waste solvent of water-based paint
  • Method and system for treating waste solvent of water-based paint
  • Method and system for treating waste solvent of water-based paint

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Embodiment Construction

[0029] In order to further elaborate the technical means and effects that the present invention adopts for reaching the intended invention purpose, below in conjunction with the accompanying drawings and preferred embodiments, the specific implementation, structure, features and effects of the present invention are described in detail as follows:

[0030] A treatment method for water-based paint waste solvent, comprising the following steps:

[0031] S1. Collect and store, collect and store the waste solvent obtained after using the water-based paint cleaning agent;

[0032] S2, salting out, transporting the stored waste liquid to a salting out device, and obtaining a supernatant and a lower layer of precipitation through salting out;

[0033] S3, filtering, transporting the supernatant to the filter for filtering.

[0034] This scheme directly precipitates the polymer resin, pigment and filler in the water-based paint waste liquid by salting out, and it is extremely convenie...

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PUM

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Abstract

The present application discloses a treatment method for waste solvent of water-based paint, comprising the following steps: collecting and storing, collecting and storing the waste solvent obtained after using a water-based paint cleaning agent; salting out, and transporting the stored waste liquid to a salting-out device , to obtain the supernatant and the lower precipitate by salting out; filter, and transport the supernatant to the filter for filtration. Wherein, the salting-out agent is calcium chloride and the addition of calcium chloride is 5% of the waste solvent. This solution directly precipitates the polymer resin in the water-based paint waste liquid by salting out, and then performs filtration and other treatments to recycle the waste water or discharge it to the outside.

Description

technical field [0001] The invention relates to the field of painting wastewater treatment, in particular to a method and system for treating waste solvent of water-based paint. Background technique [0002] The modern automobile industry uses a large number of spraying robots in the painting process. In order to ensure the quality of spraying, it is necessary to clean the paint pipeline repeatedly during the process of spraying water-based paint by robots, thus generating a large amount of waste solvents. Water-based paints are generally used in the automotive industry for intermediate coatings and base paints, and water-based paint cleaners include low-VOC cleaners (such as those produced by Z+G) and ordinary cleaners (such as those produced by AXALTA). The invention is applicable to the waste solvent produced by the low-VOC cleaning agent. The existing treatment methods have many steps and slow operation. Therefore, a simple treatment of the waste solvent can be done to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52
CPCC02F1/5236C02F1/5281
Inventor 崔明通刘本发成洪涛陈正广朱士峰刘品言牛洪嵩
Owner FAW VOLKSWAGEN AUTOMOTIVE CO LTD
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