Method for improving performance of galvanizing rinsing wastewater on-line recycling membrane-process closed system

A closed system and recycling technology, which is applied in the field of improving the performance of the closed system of the membrane method for online resource recycling of galvanized rinsing wastewater, can solve the problems of parking for cleaning, secondary pollution of waste liquid, etc., to prevent the formation of compound pollution and save economic costs , The effect of reducing the cost of economic operation

Inactive Publication Date: 2017-01-04
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, the chemical cleaning method has the following disadvantages: it needs to stop for cleaning; every time it needs to add cleaning agent; after cleaning, the waste liquid will cause secondary pollution

Method used

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  • Method for improving performance of galvanizing rinsing wastewater on-line recycling membrane-process closed system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add polyepoxysodium sodium succinate crystals to the regulating tank in the closed system of membrane method for on-line recycling of galvanized rinse wastewater. The complex physical and chemical polymerization process of the five components of acid, thiourea, surfactant, and AB-type polyamide brightener, especially breaks the core role of citric acid and thiourea, prevents the formation of inorganic and organic compound pollution, and maintains a high level for a long time Membrane flux, improving the performance of the closed system of membrane method for online recycling of galvanized rinsing wastewater, and reducing economic operating costs.

[0027] Implementation effect of this embodiment:

[0028] 1. The additive sodium polyepoxysuccinate can inhibit the complex physical and chemical polymerization process of the five components of zinc chloride, citric acid, thiourea, surfactant, and AB polyamide brightener in the galvanizing solution, especially breaking the c...

Embodiment 2

[0033] Add sodium polyepoxysuccinate solution to the electroplating tank in the closed system of galvanizing rinse wastewater online recycling membrane method. After adding, the concentration on the thick side of the film in the system is 25.0ppm. The complex physical and chemical polymerization process of the five components of acid, thiourea, surfactant, and AB-type polyamide brightener, especially breaks the core role of citric acid and thiourea, prevents the formation of inorganic and organic compound pollution, and maintains a high level for a long time Membrane flux, improving the performance of the closed system of membrane method for online recycling of galvanized rinsing wastewater, and reducing economic operating costs.

[0034] Implementation effect of this embodiment:

[0035] 1. The additive sodium polyepoxysuccinate can inhibit the complex physical and chemical polymerization process of the five components of zinc chloride, citric acid, thiourea, surfactant, and AB...

Embodiment 3

[0040] Add sodium polyepoxysuccinate solution to the regulating tank in the closed system of galvanized rinse wastewater on-line recycling membrane method. After adding, the concentration on the thick side of the film in the system is 50.0ppm. The complex physical and chemical polymerization process of the five components of acid, thiourea, surfactant, and AB-type polyamide brightener, especially breaks the core role of citric acid and thiourea, prevents the formation of inorganic and organic compound pollution, and maintains a high level for a long time Membrane flux, improving the performance of the closed system of membrane method for online recycling of galvanized rinsing wastewater, and reducing economic operating costs.

[0041] Implementation effect of this embodiment:

[0042] 1. The additive sodium polyepoxysuccinate can inhibit the complex physical and chemical polymerization process of the five components of zinc chloride, citric acid, thiourea, surfactant, and AB p...

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Abstract

The invention relates to a method for improving performance of a galvanizing rinsing wastewater on-line recycling membrane-process closed system. According to the method, sodium polyepoxysuccinate is added into the galvanizing rinsing wastewater on-line recycling membrane-process closed system, wherein the addition concentration is 0.5-50ppm of the membrane concentrated side in the system. Compared with the prior art, the method greatly improves the performance of the galvanizing rinsing wastewater on-line recycling membrane-process closed system, lowers the cost, can be continuously carried out, and does not form secondary pollution.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a method for improving the performance of a closed system of a membrane method for on-line recycling of galvanized rinse wastewater. Background technique [0002] Electroplating is an important process link in the manufacturing industry, and the composition of the discharged wastewater is complex. The average annual discharge of electroplating wastewater in my country is as high as 4 billion tons, of which rinsing wastewater accounts for 80%, about 3.2 billion tons. Galvanizing is a main type of plating in my country, and the corresponding galvanizing rinse wastewater is also a large amount of electroplating rinse wastewater. In addition to heavy metal pollutants containing zinc ions, it also contains a considerable amount of organic compounds such as additives and brighteners. When these chemical substances enter the environment, they will inevitably cause serious harm t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10B01D65/02B01D65/08C02F103/16
CPCC02F9/00B01D65/02B01D65/08B01D2321/168C02F1/001C02F1/048C02F1/441C02F1/442C02F2103/16C02F2303/14
Inventor 靳强
Owner SHANGHAI JIAO TONG UNIV
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