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Paper-making deinking sewage treatment method

A sewage treatment method and treatment method technology, which is applied in the direction of flotation water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problem of high treatment cost, and achieve the effects of reducing treatment cost, reducing impurities, and reducing turbidity

Inactive Publication Date: 2008-03-26
SHENZHEN SANLIXING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the selection of coagulants, especially organic fixatives, which are strongly electropositive organic compounds, requires relatively high processing costs.

Method used

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  • Paper-making deinking sewage treatment method
  • Paper-making deinking sewage treatment method
  • Paper-making deinking sewage treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take a sample of deinked sewage and stir it with a multi-connected mixer in the factory laboratory. Add bentonite to the sewage first, and then add anionic polyacrylamide. The total amount of bentonite in the sewage is 50ppm, and the anionic polyacrylamide in the sewage The total amount added is 3ppm. Observe the size of the flocs and the sinking speed under stirring conditions, and measure the turbidity of the treated water at the same time. The measurement results are shown in Table 1.

Embodiment 2

[0024] Except that the total amount of bentonite added in the sewage is 100ppm, all the other are the same as in Example 1.

Embodiment 3

[0026] Take a sample of deinked sewage and stir it with a multi-connected mixer in the factory laboratory. First add montmorillonite to the sewage, and then add anionic polyacrylamide. The total amount of montmorillonite added to the sewage is 60ppm, and the anionic polypropylene The total amount of amides added to sewage is 3ppm. Observe the size of the flocs and the sinking speed under stirring conditions, and measure the turbidity of the treated water at the same time. The measurement results are shown in Table 1.

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Abstract

The deinking waste water treating process for papermaking includes the first adding expandable clay in 1-200 ppm and water soluble polymer in 1-20 ppm into the deinking waste water and the subsequent treating the deinking waste water in deinking waste water treating apparatus. The process has high deinking waste water treating effect, low cost and no need of altering the technological conditions of deinkng alkali process.

Description

technical field [0001] The invention belongs to a sewage treatment method, in particular to a papermaking deinking sewage treatment method. Background technique [0002] Waste paper is an important raw material for papermaking. Because most waste paper is printed with ink, the ink must be removed from the fibers when it is recycled, and then removed by flotation, bleaching and washing. Otherwise, small ink spots will appear on the surface of the paper produced from waste paper, which will affect the appearance of the paper. Deinking of waste paper is an important process in the manufacture of cultural paper, newsprint, household paper and packaging board. [0003] The widely used waste paper deinking technology is alkaline deinking. When deinking, a series of chemicals such as sodium hydroxide are added to the waste paper pulp to promote the ink to peel off from the fiber surface under alkaline conditions, and separate from the fiber during flotation and washing, and rema...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/24
Inventor 刘军钛汤衡军
Owner SHENZHEN SANLIXING IND
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