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Processing method of paper machine wet end off-machine water

A treatment method and white water technology, applied in the wet end of paper machine, papermaking, papermaking and other directions, can solve the problems of increasing the amount of pulp and affecting the papermaking rate, and achieve the effects of improving the papermaking rate, improving the use efficiency and improving the running performance.

Inactive Publication Date: 2014-12-03
东莞市深联造纸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing technology does not use an effective method to add cationic additives, so that the anions in the white water cannot be effectively treated, resulting in an increase in the amount of sludge, thereby affecting the copying rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A treatment method for papermaking wet end white water, it comprises the following treatment steps:

[0039] a. Measure the amount of negative charges in the white water in the wet end of papermaking with a particle charge tester;

[0040] b. Determine the amount of liquid aluminum sulfate additive added according to the amount of negative charge. The added liquid aluminum sulfate additive can make the pH value of the white water in the wet end 7. Among them, the liquid aluminum sulfate additive consists of 75 parts of water, solid sulfuric acid Composed of 20 parts of aluminum, 1 part of hydrotalcite powder, 0.2 part of oxidized polyethylene, 1 part of cetyltrimethylammonium bromide, and 1 part of dodecyldimethylbenzylammonium bromide.

[0041] Using the wet end white water treated by the method of this embodiment can increase the papermaking rate by 20%.

Embodiment 2

[0043] A treatment method for papermaking wet end white water, it comprises the following treatment steps:

[0044] a. Measure the amount of negative charges in the white water in the wet end of papermaking with a particle charge tester;

[0045] b. Determine the amount of liquid aluminum sulfate additive added according to the amount of negative charge. The added liquid aluminum sulfate additive can make the pH value of the white water in the wet end 6. Among them, the liquid aluminum sulfate additive consists of 80 parts of water, solid sulfuric acid 25 parts of aluminum, 5 parts of hydrotalcite powder, 0.6 parts of polyethylene oxide, 2 parts of cetyltrimethylammonium bromide, and 2 parts of dodecyldimethylbenzyl ammonium bromide.

[0046] Using the wet end white water treated by the method of this embodiment can increase the papermaking rate by 22%.

Embodiment 3

[0048] A treatment method for papermaking wet end white water, it comprises the following treatment steps:

[0049] a. Measure the amount of negative charges in the white water in the wet end of papermaking with a particle charge tester;

[0050] b. Determine the amount of liquid aluminum sulfate additive added according to the amount of negative charge. The added liquid aluminum sulfate additive can make the pH value of the white water in the wet end 7. Among them, the liquid aluminum sulfate additive consists of 80 parts of water, solid sulfuric acid 25 parts of aluminum, 5 parts of hydrotalcite powder, 0.6 parts of oxidized polyethylene, 3 parts of cetyltrimethylammonium bromide, and 3 parts of dodecyldimethylbenzyl ammonium bromide.

[0051] Using the wet end white water treated by the method of this embodiment can increase the papermaking rate by 25%.

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PUM

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Abstract

The invention belongs to the technical field of papermaking off-machine water and particularly relates to a processing method of paper machine wet end off-machine water. The processing method includes the steps of a, determining quantity of negative charge in the paper machine wet end off-machine water; b, adding cationic auxiliary according to the quantity of the negative charge. By measuring surface charge of the paper machine wet end off-machine water to detect chemical change of a wet end, addition of chemicals at the wet end is guided effectively and timely, running performance of a paper machine is improved, and service efficiency of the wet end chemicals is improved. The cationic auxiliary is added for neutralization after anions of the wet end off-machine water are measured, and accordingly papermaking rate is increased.

Description

technical field [0001] The invention belongs to the technical field of papermaking white water treatment, and in particular relates to a treatment method for papermaking wet end white water. Background technique [0002] The number of negative charges contained in waste paper pulp is much greater than that of original pulp, mainly because waste paper has a high content of fine fibers, and waste paper pulp contains a large amount of anionic garbage with complex components, and most of the dissolved and colloidal substances are anionic Call it anionic "junk". The surface charge of various particles in the wet end of papermaking and the amount of soluble charged substances determine their aggregation state, which is the key factor for functional additives to exert their effectiveness. [0003] The prior art does not use an effective method to add cationic additives, so that the anions in the white water cannot be effectively treated, resulting in an increase in the amount of s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21F1/66
Inventor 张高远邱玉雄卢奇斌
Owner 东莞市深联造纸有限公司