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A kind of production method of environment-friendly and energy-saving household paper wood pulp

A technology for tissue paper, environmental protection and energy saving, which is applied in pulp bleaching, cellulose pulp post-treatment, papermaking, etc., can solve the problems affecting the development of tissue paper industry, such as hard bamboo fiber and dense fiber structure, and improve cooking efficiency. Uniformity, good swelling force, effect of reducing impurity content

Active Publication Date: 2016-05-18
ANHUI BILUN DOMESTIC PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the development of my country's household paper industry, domestic enterprises mostly use cotton pulp as the raw material for tissue paper production. However, due to the constraints of planting area and growth cycle, this raw material is increasingly in short supply, which has seriously affected the development of my country's household paper industry. develop
For this reason, very few enterprises try to use bamboo pulp as the production raw material of household paper, and have achieved preliminary success, as the patent No. is CN02112175.3, and the invention patent named "bamboo pulp denaturation production process" discloses a The production process of bamboo pulp, but the average length of bamboo fiber is lower than that of paper-making wood fiber, and because of its high ash content and high pentose content, bamboo fiber is hard, thick-walled, narrow cell cavity, dense fiber tissue, There are problems such as air in the cells, which makes production difficult, requires a lot of raw materials, and costs high, so it has not been widely used

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for producing environmentally friendly and energy-saving household paper wood pulp, comprising the steps of:

[0027] (1) Material preparation: After stacking the paper-making grade wood pulp boards on the conveyor, they are fed to the hydraulic pulper by belt conveyor as required, and then sent to the press for extrusion and dehydration after being sprayed with alkali and dispersed by the agitator;

[0028] (2) Enzyme treatment: add enzyme to the extruded and dehydrated slurry, the treatment temperature is 40°C, the treatment time is 1h, the concentration of the slurry is 5%, and the pH is 6.5;

[0029] (3) Cooking: The pulp after enzyme treatment is cooked by kraft cooking process; among them, the amount of caustic soda accounts for 14% of the dry pulp, the degree of sulfidation is 26%, the liquor ratio is 1:2, and the heating time is 80min. The holding time is 60min, the holding temperature is 160°C, and the kappa number of the slurry after cooking is 40;

...

Embodiment 2

[0036] A method for producing environmentally friendly and energy-saving household paper wood pulp, comprising the steps of:

[0037] (1) Material preparation: After stacking the paper-making grade wood pulp boards on the conveyor, they are fed to the hydraulic pulper by belt conveyor as required, and then sent to the press for extrusion and dehydration after being sprayed with alkali and dispersed by the agitator;

[0038] (2) Enzyme treatment: add enzyme to the extruded and dehydrated slurry, the treatment temperature is 45°C, the treatment time is 1.5h, the concentration of the slurry is 8%, and the pH is 7;

[0039] (3) Cooking: The pulp after enzyme treatment is cooked by kraft cooking process; among them, the amount of caustic soda accounts for 15% of the dry pulp, the degree of sulfidation is 27%, the liquor ratio is 1:2.5, and the heating time is 85min. The holding time is 75min, the holding temperature is 165°C, and the kappa number of the slurry after cooking is 50;

...

Embodiment 3

[0046] A method for producing environmentally friendly and energy-saving household paper wood pulp, comprising the steps of:

[0047] (1) Material preparation: After stacking the paper-making grade wood pulp boards on the conveyor, they are fed to the hydraulic pulper by belt conveyor as required, and then sent to the press for extrusion and dehydration after being sprayed with alkali and dispersed by the agitator;

[0048] (2) Enzyme treatment: Add enzyme to the extruded and dehydrated slurry, the treatment temperature is 50°C, the treatment time is 2h, the concentration of the slurry is 10%, and the pH is 7.5;

[0049] (3) Cooking: The pulp after enzyme treatment is cooked by kraft cooking process; among them, the amount of caustic soda accounts for 16% of the absolute dry pulp, the degree of sulfidation is 28%, the liquor ratio is 1:3, and the heating time is 90min. The holding time is 90min, the holding temperature is 170°C, and the kappa number of the slurry after cooking...

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Abstract

The invention relates to the technical field of living paper, particularly to a production method for an environment-friendly and energy-saving living paper wood pulp. The production method comprises the following steps: (1) material preparation; (2), enzyme treatment: adding enzymes in pulp which is extruded and dehydrated for treatment, wherein the treatment temperature is 40-60 DEG C, the treatment time is 1-2 hours, the concentration of the pulp is 5-15%, and pH is 6.5-7.5; (3) cooking: cooking the pulp which is treated by using the enzymes by a sulfate method cooking technology; (4), chlorination: chloridizing the cooked pulp; (5), oxygen delignification treatment: performing oxygen delignification treatment on the chloridized pulp, and removing 40-60% of lignin, wherein the kappa number of the pulp after the oxygen delignification is performed is 20-30; (6), acid treatment: adding pulp subjected to oxygen delignification in hydrochloric acid for acid treatment for 30-50 minutes. The method disclosed by the invention is simple in technology, and easy to operate; the produced wood pulp conforms to the production requirement of the living paper, and the method is energy-saving and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of household paper, in particular to an environment-friendly and energy-saving production method of household paper wood pulp. Background technique [0002] With the development of my country's household paper industry, domestic enterprises mostly use cotton pulp as the raw material for tissue paper production. However, due to the constraints of planting area and growth cycle, this raw material is increasingly in short supply, which has seriously affected the development of my country's household paper industry. develop. For this reason, very few enterprises try to use bamboo pulp as the production raw material of household paper, and have achieved preliminary success, as the patent No. is CN02112175.3, and the invention patent named "bamboo pulp denaturation production process" discloses a The production process of bamboo pulp, but the average length of bamboo fiber is lower than that of paper-making wood f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C5/00D21C3/22
CPCD21B1/34D21C1/00D21C3/22D21C9/1068D21C9/12
Inventor 许亦南豆正红方立权陈云峰
Owner ANHUI BILUN DOMESTIC PAPER CO LTD
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