Recycling method of coating water-based colored paint waste solvent

A waste solvent and color paint technology, which is applied in the field of recycling waste solvents for vehicles, can solve problems such as potential safety hazards in painting workshops, reduce hazardous waste treatment costs and raw material costs, excellent cleaning capabilities, and achieve hazardous waste reduction effect

Pending Publication Date: 2020-06-19
天津净润环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Waste paint cleaning agent is regarded as hazardous waste, and its storage and transportation bring great safety hazards to the painting workshop

Method used

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  • Recycling method of coating water-based colored paint waste solvent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The settled paint waste solvent is added to the reaction kettle R101, and then the flocculant aqueous solution is added to the reaction kettle R101, wherein the flocculant aqueous solution is a mixed aqueous solution of polysilicic acid and polysilicate iron with a mass concentration of 2%, and the flocculant aqueous solution and the waste solvent The mass ratio of the suspension is 0.1:4, and after being fully stirred, it is transported to the filter FT101 by the suspension delivery pump P101. The filter FT101 filters out the solid impurities after flocculation, and the clear liquid enters the clear liquid tank V101. The clear liquid delivery pump P102 transports the clear liquid to the primary adsorption tower T101 filled with activated carbon and the secondary adsorption tower T102 filled with ion exchange resin in sequence, and then enters the mother liquor tank V102. The mother liquor delivery pump P103 transports the materials in the mother liquor tank V102 to the...

Embodiment 2

[0030] The settled paint waste solvent is added to the reaction kettle R101, and then the flocculant aqueous solution is added to the reaction kettle R101, wherein the flocculant aqueous solution is a mixed aqueous solution of sodium polyacrylate and anionic polyacrylamide with a mass concentration of 0.02%, and the flocculant aqueous solution is mixed with the waste The mass ratio of the solvent is 1.5:4, and after being fully stirred, it is transported to the filter FT101 by the suspension delivery pump P101. The filter FT101 filters out the solid impurities after flocculation, and the clear liquid enters the clear liquid tank V101. The clear liquid delivery pump P102 transports the clear liquid to the primary adsorption tower T101 filled with activated carbon and the secondary adsorption tower T102 filled with ion exchange resin in sequence, and then enters the mother liquor tank V102. The mother liquor delivery pump P103 transports the materials in the mother liquor tank V...

Embodiment 3

[0032] The settled paint waste solvent is added to the reaction kettle R101, and then the flocculant aqueous solution is added to the reaction kettle R101, wherein the flocculant aqueous solution is a cationic polyacrylamide aqueous solution with a mass concentration of 1%, and the mass ratio of the flocculant aqueous solution to the waste solvent is The ratio is 0.5:4. After fully stirring, it is sent to the filter FT101 by the suspension pump P101. The filter FT101 filters out the solid impurities after flocculation, and the clear liquid enters the clear liquid tank V101. The clear liquid delivery pump P102 transports the clear liquid to the primary adsorption tower T101 filled with activated carbon and the secondary adsorption tower T102 filled with ion exchange resin in sequence, and then enters the mother liquor tank V102. The mother liquor delivery pump P103 transports the materials in the mother liquor tank V102 to the membrane separation device MS101. The membrane sepa...

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PUM

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Abstract

The invention discloses a recycling method of a coating water-based colored paint waste solvent. The method comprises the following steps: adding a colored paint waste solvent into a reaction kettle (R101), adding a flocculant water solution into the reaction kettle (R101), sufficiently stirring, conveying to a filter (FT101), filtering out flocculated solid impurities, and feeding the clear liquid into a clear liquid tank (V101); sequentially conveying the clear liquid in the clear liquid tank (V101) to a primary adsorption tower (T101) and a secondary adsorption tower (T102), feeding the treated material into a mother liquid tank (V102), then feeding into a membrane separation device (MS101), filtering, extracting the filtrate obtained after filtering as a recovered solvent, and returning the recycled solvent to the mother liquid tank (V102). According to the invention, the recovery rate of the effective component in the colored paint waste solvent is greater than or equal to 85%, the hazardous waste decrement is greater than or equal to 85%, and the recovered solvent can be used for on-site robot color-changing cleaning and other related cleaning after a small amount of primarycolor paint cleaning agent is supplemented.

Description

technical field [0001] The invention relates to a method for recycling waste solvents for vehicles, in particular to a method for recycling waste solvents for painting water-based color paints. Background technique [0002] The water-based paint cleaning agent in the automobile painting workshop is mainly used for cleaning when the paint robot changes colors. After use, the fresh paint cleaning agent is mixed with paint components (water, resin, color paste, etc.) as waste paint cleaning agent and stored in hazardous waste tanks, and then outsourced to hazardous waste manufacturers as hazardous waste for disposal. Waste paint cleaning agent is regarded as hazardous waste, and its storage and transportation bring great safety hazards to painting workshops. The waste paint cleaner contains all the active ingredients of the paint cleaner, so as long as the active ingredients in the waste paint cleaner are recycled, it is not only in line with the national green development str...

Claims

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Application Information

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IPC IPC(8): C08J11/02
CPCC08J11/02
Inventor 何永超张鹏
Owner 天津净润环保科技有限公司
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