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Compound decolorizing flocculant and preparation method thereof

A technology of decolorizing flocculant and polyaluminium chloride, which is applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sewage treatment, etc. It can solve the problems of high treatment cost, complicated treatment process and unsatisfactory decolorization effect, etc. problem, to achieve the effect of low operating cost, high decolorization efficiency and good flocculation effect

Inactive Publication Date: 2018-06-01
新疆水处理工程技术研究中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the treatment of printing and dyeing wastewater has become the top priority of research. Among them, flocculation and decolorization are very important steps in the treatment of printing and dyeing wastewater. At present, activated carbon, activated clay, polyiron, polyaluminum, etc. Decolorization and flocculation treatment, but the treatment cost of the first two is high and the treatment process is complicated, while the latter two have good flocculation effect but unsatisfactory decolorization effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A composite decolorizing flocculant, comprising the following raw materials in percentage by weight: polyaluminum chloride 10%, ferric chloride 1%, polydimethyldiallyl ammonium chloride 25%, dicyandiamide formaldehyde resin 15%, and the balance is deionized water.

[0020] The preparation method of the composite decolorizing flocculant that the present invention proposes, method step is as follows:

[0021] S1: First add 1 / 2 amount of deionized water into the reaction vessel, then add polyaluminum chloride and ferric chloride into the reaction vessel, stir and mix;

[0022] S2: Add polydimethyldiallylammonium chloride to the reactor of S1, stir and mix;

[0023] S3: Add dicyandiamide formaldehyde resin into the reactor of S2, and add the remaining amount of deionized water while stirring, and mix well to obtain a composite decolorizing flocculant.

[0024] The stirring conditions in S1 are: temperature 20°C, stirring speed 600r / min, stirring time 10min.

[0025] Stir...

Embodiment 2

[0029] A composite decolorizing flocculant, comprising the following raw materials in percentage by weight: polyaluminum chloride 15%, ferric chloride 3%, polydimethyl diallyl ammonium chloride 30%, dicyandiamide formaldehyde resin 20%, and the balance is deionized water.

[0030] The preparation method of the composite decolorizing flocculant that the present invention proposes, method step is as follows:

[0031] S1: First add 1 / 2 amount of deionized water into the reaction vessel, then add polyaluminum chloride and ferric chloride into the reaction vessel, stir and mix;

[0032] S2: Add polydimethyldiallylammonium chloride to the reactor of S1, stir and mix;

[0033] S3: Add dicyandiamide formaldehyde resin into the reactor of S2, and add the remaining amount of deionized water while stirring, and mix well to obtain a composite decolorizing flocculant.

[0034] The stirring conditions in S1 are: temperature 20°C, stirring speed 600r / min, stirring time 10min.

[0035] Sti...

Embodiment 3

[0039] A composite decolorizing flocculant, comprising the following raw materials in percentage by weight: polyaluminum chloride 12%, ferric chloride 2%, polydimethyl diallyl ammonium chloride 28%, dicyandiamide formaldehyde resin 18%, and the balance is deionized water.

[0040] The preparation method of the composite decolorizing flocculant that the present invention proposes, method step is as follows:

[0041] S1: First add 1 / 2 amount of deionized water into the reaction vessel, then add polyaluminum chloride and ferric chloride into the reaction vessel, stir and mix;

[0042] S2: Add polydimethyldiallylammonium chloride to the reactor of S1, stir and mix;

[0043] S3: Add dicyandiamide formaldehyde resin into the reactor of S2, and add the remaining amount of deionized water while stirring, and mix well to obtain a composite decolorizing flocculant.

[0044] The stirring conditions in S1 are: temperature 20°C, stirring speed 600r / min, stirring time 10min.

[0045] Sti...

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PUM

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Abstract

The invention discloses a compound decolorizing flocculant and a preparation method thereof. The compound decolorizing flocculant is prepared from the following raw materials by weight percent: 10-15%of polyaluminum chloride, 1-3% of ferric chloride, 25-30% of poly dimethyl diallyl ammonium chloride, 15-20% of dicyandiamide formaldehyde resin and the balance of deionized water. The compound decolorizing flocculant is prepared by combining inorganic and organic matters, has the characteristics of being high in decoloration efficiency and good in flocculation effect, and also has the characteristics of being lower in investment cost, low in operating cost, low in effluent chroma, and the like; after printing and dyeing wastewater is treated by means of the compound decolorizing flocculant,the effluent can reach the A-level standard requirements of chroma being lower than 30 times and suspended solids being less than 20mg / L.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a composite decolorizing flocculant 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, with 6-7×10 8 Tons of printing and dyeing wastewater are discharged into the water environment. Printing and dyeing wastewater has the characteristics of large chroma, high organic matter content and large changes in water temperature, water volume, water quality and pH value. The massive discharge of printing and dyeing wastewater has become one of the important factors threatening the safety of my country's water environment. Therefore, the treatment of printing and dyeing wastewater has become the top priority of research. Among them, flocculation and decolorization are very important steps in the treatment of printing and dyeing wastewater. At present, act...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/56
CPCC02F1/5236C02F1/56
Inventor 徐进峰曾凡付王刚
Owner 新疆水处理工程技术研究中心有限公司
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