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Printing and dyeing wastewater flocculation decolorizing agent and preparation method thereof

A printing and dyeing wastewater and decolorizing agent technology, applied in chemical instruments and methods, textile industry wastewater treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problems of difficult storage, poor stability, decolorization effect and COD removal rate Poor and other problems, to achieve good stability, high decolorization rate, decolorization effect and good flocculation effect

Inactive Publication Date: 2016-05-04
SUZHOU FAST INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many flocculants on the market, the flocculation effect is good, but the decolorization effect and COD removal rate are still not good
At the same time, the stability is not very good, and it is not easy to store

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A flocculation and decolorizing agent for printing and dyeing wastewater, comprising in parts by weight: 20 parts of sodium silicate, 0.5 part of deacetylated chitin, 0.5 part of aluminum sulfate, 0.5 part of dicyandiamide, 0.1 part of sodium chloride, 1 part of sodium hypochlorite, wood 0.1 part of plain element, 0.1 part of sodium trichloroisocyanurate, 0.1 part of dodecyl dimethyl benzyl ammonium chloride, 0.2 part of concentrated sulfuric acid, and 25 parts of water.

[0018] The preparation method of the above-mentioned printing and dyeing wastewater flocculation decolorizer is as follows: first mix and stir sodium silicate and 15 parts of water at room temperature to obtain a sodium silicate solution; then slowly add the mixed solution of concentrated sulfuric acid and 2 parts of water, and stir while adding Blue liquid; mix aluminum sulfate with 3 parts of water, slowly add into the light blue liquid, then add sodium trichloroisocyanurate liquid, stir for 2 hours ...

Embodiment 2

[0020] A flocculating and decolorizing agent for printing and dyeing wastewater, comprising in parts by weight: 25 parts of sodium silicate, 0.7 parts of deacetylated chitin, 0.8 parts of aluminum sulfate, 0.7 parts of dicyandiamide, 0.15 parts of sodium chloride, 1.5 parts of sodium hypochlorite, wood 0.15 parts of plain element, 0.15 parts of sodium trichloroisocyanurate, 0.15 parts of dodecyl dimethyl benzyl ammonium chloride, 0.3 parts of concentrated sulfuric acid, and 30 parts of water.

[0021] The preparation method of the above-mentioned printing and dyeing wastewater flocculation decolorizer is as follows: first mix and stir sodium silicate and 17 parts of water at room temperature to obtain a sodium silicate solution; then slowly add the mixed solution of concentrated sulfuric acid and 4 parts of water, and stir while adding Blue liquid; mix aluminum sulfate with 4 parts of water, slowly add into the light blue liquid, then add sodium trichloroisocyanurate liquid, st...

Embodiment 3

[0023] A flocculation and decolorization agent for printing and dyeing wastewater, comprising in parts by weight: 30 parts of sodium silicate, 1 part of deacetylated chitin, 1 part of aluminum sulfate, 1 part of dicyandiamide, 0.2 parts of sodium chloride, 2 parts of sodium hypochlorite, wood 0.2 parts of plain element, 0.2 parts of sodium trichloroisocyanurate, 0.2 parts of dodecyl dimethyl benzyl ammonium chloride, 0.4 parts of concentrated sulfuric acid, and 35 parts of water.

[0024] The preparation method of the above-mentioned printing and dyeing wastewater flocculation decolorizer is as follows: first mix and stir sodium silicate and 20 parts of water at room temperature to obtain sodium silicate solution; then slowly add the mixed solution of concentrated sulfuric acid and 5 parts of water, and stir while adding Blue liquid; mix aluminum sulfate with 5 parts of water, slowly add into the light blue liquid, then add sodium trichloroisocyanurate liquid, stir for 3 hours ...

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Abstract

The invention provides a printing and dyeing wastewater flocculation decolorizing agent and a preparation method thereof. The flocculation decolorizing agent is prepared from sodium silicate, deacetylated chitin, aluminum sulfate, dicyandiamide, sodium chloride, sodium hypochlorite, lignin, symclosene, dodecyl dimethyl benzyl ammonium chloride, concentrated sulfuric acid and water. The preparation method comprises the steps that firstly, the sodium silicate and the water are mixed and stirred at room temperature to obtain a sodium silicate solution; then, the mixed solution of the concentrated sulfuric acid and water is slowly added, and light blue liquid is obtained through adding while stirring; the aluminum sulfate is mixed with water, the light blue liquid is slowly added, then the symclosene liquid is added, stirring is performed for 2.5 hours, standing is performed for 24 hours, and then a solution is obtained; the residual components are mixed and added into the solution, and stirring continues to obtain the flocculation decolorizing agent. The flocculation decolorizing agent is high in decolourization ratio, good in decolourization effect, good in flocculation effect and high in stability. In addition, the printing and dyeing wastewater flocculation decolorizing agent is simple in production process and is suitable for industrial production.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a flocculation decolorizer for printing and dyeing wastewater and a preparation method thereof. Background technique [0002] The wastewater discharge of my country's printing and dyeing industry ranks second in the industrial sector, and the annual discharge is as high as 6.5×10 8 It is one of the key polluting industries in my country. Printing and dyeing wastewater refers to the industrial wastewater produced by textile printing and dyeing factories mainly processing cotton, hemp, chemical fibers and their blended products. It is one of the industrial wastewater that is difficult to treat. , water quality changes and so on. A large amount of printing and dyeing wastewater has entered my country's water environment, which has become one of the important factors threatening the safety of my country's water environment. Therefore, the treatment of printing and dyeing wastew...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/54C02F1/56C02F103/30
CPCC02F1/5236C02F1/5245C02F1/5263C02F1/54C02F1/56C02F2103/30
Inventor 彭孝茹
Owner SUZHOU FAST INFORMATION TECH CO LTD
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