A preparation method of polymer composite flocculant for printing and dyeing sewage

A composite flocculant, printing and dyeing sewage technology, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of high operator requirements, high cost, low efficiency, etc. Good processing effect and good combination effect

Active Publication Date: 2022-04-15
佛山市弘峻水处理设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There are many treatment processes for printing and dyeing wastewater. The most representative one is the traditional method of direct chemical treatment. This method has a low recycling rate, and the discharged treated wastewater still contains a large amount of harmful substances, and the cost is high and the efficiency is low; The second is to use the plasma exchange method. This method has high requirements for operators. As far as the current textile industry is concerned, it is necessary to increase the investment in high-level talents in this regard. After the wastewater is treated, it is still in a state of eutrophication.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of a polymer composite flocculant for printing and dyeing sewage, comprising the following steps:

[0026] A, put sodium carboxymethyl cellulose into the reactor, then add sodium chloride solution and stir to form a constant temperature water bath reaction system;

[0027] B, adding vinyl polyamine, internal initiator and crosslinking agent into the reaction kettle, stirring and reacting at constant temperature for 6.5 hours, and standing at constant temperature for 2.5 hours to obtain a viscous liquid;

[0028] C, open the reaction kettle, add acrylamide, carry out a constant temperature heating reaction under nitrogen conditions for 4 hours, and at the same time add the lye of the external initiator dropwise, stir for 2.5 hours after the reaction, and let stand for cooling;

[0029] D. On the basis of step C, add an activator, and after stirring evenly, slowly add an amino acid solution with a mass ratio of 2.2%, stir in a constant temperature wat...

Embodiment 2

[0040] A preparation method of a polymer composite flocculant for printing and dyeing sewage, comprising the following steps:

[0041] A, put sodium carboxymethyl cellulose into the reactor, then add sodium chloride solution and stir to form a constant temperature water bath reaction system;

[0042] B, adding vinyl polyamine, internal initiator and cross-linking agent into the reaction kettle, stirring and reacting at constant temperature for 8 hours, and standing at constant temperature for 2 hours to obtain a viscous liquid;

[0043] C, open the reaction kettle, add acrylamide, carry out a constant temperature heating reaction under nitrogen conditions for 5 hours, and add the lye of the external initiator dropwise at the same time, stir for 1 hour after the reaction, and let stand for cooling;

[0044] D. On the basis of step C, add an activator, and after stirring evenly, slowly add an amino acid solution with a mass ratio of 2.7%, and stir in a constant temperature water...

Embodiment 3

[0055] A preparation method of a polymer composite flocculant for printing and dyeing sewage, comprising the following steps:

[0056] A, put sodium carboxymethyl cellulose into the reactor, then add sodium chloride solution and stir to form a constant temperature water bath reaction system;

[0057] B, adding vinyl polyamine, internal initiator and cross-linking agent into the reaction kettle, stirring and reacting at constant temperature for 6 hours, and standing at constant temperature for 4 hours to obtain a viscous liquid;

[0058] C, open the reaction kettle, add acrylamide, carry out a constant temperature heating reaction under nitrogen conditions for 3 hours, and at the same time add the lye of the external initiator dropwise, stir for 3 hours after the reaction, and let stand to cool;

[0059] D. On the basis of step C, add an activator, and after stirring evenly, slowly add an amino acid solution with a mass ratio of 1.8%, and stir in a constant temperature water ba...

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PUM

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Abstract

The invention discloses a preparation method of a polymer composite flocculant used for printing and dyeing sewage. Carboxymethyl cellulose sodium is used as the main raw material, and acrylamide branch chains are formed while being aminated under vinyl polyamine conditions. After the activator, amino acids are used to modify the polymer. When the polymer flocculant is used, it has a good combination with aluminum hydroxide gel, which is conducive to the sedimentation of organic matter; and adding a compound enzyme treatment agent can make the sewage Large molecules such as proteins in the gel are decomposed into small molecules, which are more easily adsorbed by the gel. The polymer composite flocculant of the present invention not only has a good treatment effect on printing and dyeing sewage, but also does not cause secondary pollution during the preparation process and use process, and is safe and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a preparation method of a polymer composite flocculant used for printing and dyeing sewage. Background technique [0002] The advantages of inorganic flocculants are that they are relatively economical and easy to use; however, they are used in large quantities, have low flocculation effects, and have the disadvantages of high cost and strong corrosiveness. Organic polymer flocculants are a new type of wastewater treatment agent developed in the late 1960s. Compared with traditional flocculants, it can double the efficiency and lower the price, so it has a tendency to gradually become the mainstream agent. In addition to the stable product quality, the production of organic polymeric flocculants has accounted for 30-60% of the total output of flocculants. Certain natural macromolecular organic compounds such as polysaccharides with more carboxyl groups and starch with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34C02F103/30
CPCC02F3/342C02F2103/30
Inventor 张永利欧阳永中
Owner 佛山市弘峻水处理设备有限公司
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