Method for enhancing nickel plating rinsing wastewater on-line recycling membrane process closed system efficiency

A closed system and resource recovery technology, which is applied in the field of improving the efficiency of the closed system of the membrane method for online recycling of nickel-plating rinsing wastewater. It can solve the problems of secondary pollution of waste liquid and the need to stop for cleaning, so as to save economic costs and prevent the formation of compound pollution. , The effect of reducing economic operating costs

Inactive Publication Date: 2016-12-21
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 enhancing nickel plating rinsing wastewater on-line recycling membrane process closed system efficiency

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Phosphine-based polycarboxylate crystals are added to the regulating tank in the closed system of nickel-plating rinsing wastewater on-line resource recycling membrane method. After the addition, the concentration on the thick side of the reverse osmosis membrane in the system is 1.0ppm. By inhibiting the nickel sulfate in the nickel plating solution, The complex physical and chemical polymerization process of the four components of boric acid, saccharin and sodium lauryl sulfate, especially breaks the core role of boric acid, prevents the formation of inorganic and organic compound pollution, maintains high membrane flux for a long time, and improves nickel plating rinse wastewater The performance of the closed system of the membrane method is resourced online, and the economical operation cost is reduced.

[0027] Implementation effect of this embodiment:

[0028] 1. The additive phosphine-based sodium polycarboxylate can inhibit the complex physical and chemical poly...

Embodiment 2

[0033] Add phosphine-based polycarboxylate solution to the electroplating tank in the closed system of nickel-plating rinse wastewater online recycling membrane method. After adding, the concentration on the thick side of the reverse osmosis membrane in the system is 50.0ppm. By inhibiting the nickel sulfate in the nickel plating solution, The complex physical and chemical polymerization process of the four components of boric acid, saccharin and sodium lauryl sulfate, especially breaks the core role of boric acid, prevents the formation of inorganic and organic compound pollution, maintains high membrane flux for a long time, and improves nickel plating rinse wastewater The performance of the closed system of the membrane method is resourced online, and the economical operation cost is reduced.

[0034] Implementation effect of this embodiment:

[0035]1. The additive phosphine-based sodium polycarboxylate can inhibit the complex physical and chemical polymerization process o...

Embodiment 3

[0040] Add phosphinopolycarboxylate sodium solution to the regulating tank in the closed system of nickel plating rinsing wastewater online recycling membrane method. After adding, the concentration on the thick side of the reverse osmosis membrane in the system is 100.0ppm. By inhibiting nickel sulfate, The complex physical and chemical polymerization process of the four components of boric acid, saccharin and sodium lauryl sulfate, especially breaks the core role of boric acid, prevents the formation of inorganic and organic compound pollution, maintains high membrane flux for a long time, and improves nickel plating rinse wastewater The performance of the closed system of the membrane method is resourced online, and the economical operation cost is reduced.

[0041] Implementation effect of this embodiment:

[0042] 1. The additive phosphine-based sodium polycarboxylate can inhibit the complex physical and chemical polymerization process of the four components of nickel sul...

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Abstract

The invention relates to a method for enhancing nickel plating rinsing wastewater on-line recycling membrane process closed system efficiency. According to the method, sodium phosphinopolycarboxylate is added into the nickel plating rinsing wastewater on-line recycling membrane process closed system, wherein the addition concentration is 1.0-100ppm of the membrane concentrated side in the system. Compared with the prior art, the method greatly improves the properties of the nickel plating 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 efficiency of a closed system of a membrane method for online recycling of nickel-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. Nickel plating is a major type of plating in my country, and the corresponding nickel plating rinsing wastewater is also a large amount of electroplating rinsing wastewater. In addition to heavy metal pollutants containing nickel 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 a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F103/16
CPCC02F1/001C02F1/08C02F1/441C02F1/442C02F9/00C02F2103/16C02F2303/14
Inventor 靳强
Owner SHANGHAI JIAO TONG UNIV
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