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Method for adding double-component retention and drainage aid in corrugated paper production process

A technology for retention and drainage aids and production process, which is applied in the process of pulp raw material addition, retention aid addition, inorganic compound addition, etc. It can solve the problems of high COD content in white water under the screen, low retention rate of pulp filler, and drainage problems. Poor performance and other problems, to achieve the effect of reducing COD content, improving water filtration performance, and increasing retention rate

Inactive Publication Date: 2015-12-02
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, a single retention and drainage aid is used in the traditional corrugated paper production process. The treatment effect is either low retention rate or poor drainage performance, resulting in low retention rate of fine components and fillers in the pulp, and white water under the screen. High COD content

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) It is the slurry that the mass concentration is 0.8% that the pulp that will get back from paper mill and white water are adjusted. Dissolve 0.1 g of cationic polyacrylamide (CPAM) in 100 ml of deionized water and stir evenly to obtain a CPAM solution with a concentration of 1 g / L.

[0021] (2) Measure 1L of slurry with a mass concentration of 0.8% and add it to a dynamic water filter. At room temperature, stir evenly at a speed of 700r / min, then add 12ml of CPAM solution with a concentration of 1g / L, and stir for 15s Measure the retention rate of the fine components of the slurry, take the filtrate and pack it in a mineral water bottle, and measure the COD content of the filtrate with a microwave sealed digestion COD method rapid tester.

[0022] The above measured results are shown in Table 1.

Embodiment 2

[0024] (1) It is the slurry that the mass concentration is 0.8% that the pulp that will get back from paper mill and white water are adjusted. Weigh 20g of modified bentonite and dissolve it in 200ml of deionized water, stir evenly to obtain a modified bentonite solution with a concentration of 100g / L.

[0025] (2) Take 1L of slurry with a mass concentration of 0.8% and add it to a dynamic water filter. At room temperature, stir evenly at a speed of 700r / min, add 4ml of bentonite solution with a concentration of 100g / L, and measure after stirring for 15s The fine components of the slurry and the retention rate of the filler, the filtrate was packed in a mineral water bottle, and the COD content of the filtrate was measured by a microwave sealed digestion COD method rapid tester.

[0026] The above measured results are shown in Table 1.

Embodiment 3

[0028] (1) It is the slurry that the mass concentration is 0.8% that the pulp that will get back from paper mill and white water are adjusted. Dissolve 0.1 g of cationic polyacrylamide (CPAM) in 100 ml of deionized water and stir evenly to obtain a CPAM solution with a concentration of 1 g / L. Weigh 20g of modified bentonite and dissolve it in 200ml of deionized water, stir evenly to obtain a modified bentonite solution with a concentration of 100g / L.

[0029] (2) Measure 1L of mass concentration of 0.8% slurry and add it to the dynamic water filter. Under room temperature, after stirring at a speed of 700r / min, 12ml of the CPAM solution with a concentration of 1g / L is stirred for 15s, and then Add 4ml of bentonite solution with a concentration of 100g / L, stir for 15s, and measure the fine components and filler retention rate of the slurry. The filtrate is packed in a mineral water bottle, and the COD content of the filtrate is measured by a microwave sealed digestion COD metho...

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Abstract

The invention discloses a method for adding a double-component retention and drainage aid in a corrugated paper production process. The method comprises the following steps: 1, preparing an aqueous cationic polyacrylamide solution with the concentration of 1g / L and an aqueous modified bentonite solution with the concentration of 100g / L; and 2, placing a paper pulp with the mass concentration of 0.8% in a dynamic drainage jar, uniformly stirring at room temperature under a rotating speed of 700-800r / min, adding 12-14ml of the aqueous cationic polyacrylamide solution to every liter of the paper pulp, stirring for 15s, adding 4-8ml of the aqueous modified bentonite solution to every liter of the paper pulp, and stirring for 15s. The method adopting a double-component retention and drainage aiding system improves the retention rate of fine components and a filler, improves the water drainage performance of the pulp, substantially reduces the COD content of tray water, and plays a great role in realization of closed circulation and zero discharge of papermaking industry white water.

Description

technical field [0001] The invention belongs to the technical field of retention and drainage aids in the papermaking industry, and in particular relates to a method for adding dual retention and drainage aids in the production process of corrugated paper. Background technique [0002] With the vigorous development of the paper industry, more problems have been exposed in the production of the paper industry, mainly including the shortage of raw materials, energy and environmental pollution. In the paper production process, with the increase of the speed of the paper machine, the amount of secondary fiber recycling will also increase, and the white water circulation rate will also be higher, but this makes the wet end system of the paper machine less sensitive to fine components and other additives. The retention rate and the water filtration performance of the pulp will decrease accordingly, and the pulp fibers will be seriously lost with the white water, which will increas...

Claims

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Application Information

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IPC IPC(8): D21H23/04D21H21/10D21H17/56D21H17/68
Inventor 杜莹莹容贤健卫威王汉成黄显南
Owner GUANGXI UNIV