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Simple and convenient method for improving performance of on-line recycling membrane closed system for rinsing wastewater of tin-plating

A closed-system and resource-based technology is applied in the field of improving the performance of the closed system of the membrane method for on-line recycling of tin-plating rinsing wastewater, which can solve the problems of secondary pollution of waste liquid and the need to stop for cleaning, saving economic costs and preventing the formation of complex pollution. , the effect of improving performance

Inactive Publication Date: 2016-12-14
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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  • Simple and convenient method for improving performance of on-line recycling membrane closed system for rinsing wastewater of tin-plating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Amino trimethylene phosphonate sodium crystals are added to the regulating tank in the closed system of tin plating rinse wastewater online resource recycling membrane method. After the addition, the concentration on the thick side of the film in the system is 1.0 ppm. The complex physical and chemical polymerization process of the four components of phenolsulfonic acid, dihydroxydiphenyl sulfone and sodium butylphenylphenolsulfonate, especially breaks the core role of phenolsulfonic acid, prevents the formation of inorganic and organic compound pollution, and maintains a high level for a long time The membrane flux can improve the performance of the closed system of membrane method for online recycling of tin-plating rinsing wastewater, and reduce the economical operation cost.

[0027] Implementation effect of this embodiment:

[0028] 1. The additive sodium aminotrimethylene phosphonate can inhibit the complex physical and chemical polymerization process of the four ...

Embodiment 2

[0033]Amino trimethylene phosphonate sodium solution is added to the electroplating tank in the closed system of tin plating rinse wastewater online resource recycling membrane method. After adding, the concentration on the film thick side in the system is 50.0ppm. The complex physical and chemical polymerization process of the four components of phenolsulfonic acid, dihydroxydiphenyl sulfone and sodium butylphenylphenolsulfonate, especially breaks the core role of phenolsulfonic acid, prevents the formation of inorganic and organic compound pollution, and maintains a high level for a long time The membrane flux can improve the performance of the closed system of membrane method for online recycling of tin-plating rinsing wastewater, and reduce the economical operation cost.

[0034] Implementation effect of this embodiment:

[0035] 1. The additive sodium aminotrimethylene phosphonate can inhibit the complex physical and chemical polymerization process of the four components ...

Embodiment 3

[0040] Amino trimethylene phosphonate sodium solution is added to the regulating tank in the closed system of tin plating rinse wastewater online resource recycling membrane method. After the addition, the concentration on the film thick side in the system is 100.0ppm. The complex physical and chemical polymerization process of the four components of phenolsulfonic acid, dihydroxydiphenyl sulfone and sodium butylphenylphenolsulfonate, especially breaks the core role of phenolsulfonic acid, prevents the formation of inorganic and organic compound pollution, and maintains a high level for a long time The membrane flux can improve the performance of the closed system of membrane method for online recycling of tin-plating rinsing wastewater, and reduce the economical operation cost.

[0041] Implementation effect of this embodiment:

[0042] 1. The additive sodium aminotrimethylene phosphonate can inhibit the complex physical and chemical polymerization process of the four compone...

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Abstract

The invention relates to a simple and convenient method for improving the performance of an on-line recycling membrane closed system for rinsing wastewater of tin-plating. The method comprises the step of adding a proper amount of sodium aminotrimethylene phosphonate to the on-line recycling membrane closed system, so that the concentration of sodium aminotrimethylene phosphonate on the thick side of a membrane in the system is 1.0 to 100 ppm. Compared with the prior art, the method provided by the invention has the advantages that the performance of the on-line recycling membrane closed system is greatly improved, the cost is reduced, the operation can be continuous, secondary pollution is avoided, and the like.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a simple and convenient method for improving the performance of a membrane closure system for on-line recycling of tin-plating rinsing 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. Tin plating is a major type of plating in my country, and the corresponding tin-plating rinsing wastewater is also a large amount of electroplating rinsing wastewater. In addition to heavy metal pollutants containing tin ions, it also contains a considerable amount of organic compounds such as additives and brighteners. These chemical substances will inevitably cause serious harm to human health ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/08C02F9/10C02F103/16
CPCB01D65/08C02F1/001C02F1/048C02F1/08C02F1/441C02F1/442C02F9/00C02F2103/16C02F2303/14
Inventor 靳强
Owner SHANGHAI JIAO TONG UNIV
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