Production method for preparing chemimechanical pulp by synergy of biological enzyme and alkali

A production method and biological enzyme technology, applied in the field of pulping and papermaking, can solve the problems of low utilization efficiency of biological enzymes, high pulping resistance, low pulp strength, etc. The effect of high pulp strength

A production method and biological enzyme technology, applied in the field of pulping and papermaking, can solve the problems of low utilization efficiency of biological enzymes, high pulping resistance, low pulp strength, etc. The effect of high pulp strength

CN110656525AInactive Publication Date: 2020-01-07山东晨鸣纸业集团股份有限公司
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  • Production method for preparing chemimechanical pulp by synergy of biological enzyme and alkali
  • Production method for preparing chemimechanical pulp by synergy of biological enzyme and alkali
  • Production method for preparing chemimechanical pulp by synergy of biological enzyme and alkali

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Effect test

Embodiment 1

[0042] Example 1 A production method for the synergistic preparation of chemical mechanical pulp by biological enzyme and alkali

[0043] (1) Raw material pretreatment: Add poplar wood chips to pulp washing water for soaking and softening, add pulp washing water to wet the wood chips in the feeding tank by spraying, the temperature is 50-70 ° C, and the treatment time is 30 minutes;

[0044] The pulp washing water is the waste water obtained in the press dehydration step of the process, the pH is 9-10, and the content of hydrogen peroxide is 0.8-0.9%;

[0045] (2) Biological enzyme treatment: put the pretreated wood chips into the alkaline biological enzyme storage tank for treatment, the treatment temperature is 40°C, and the treatment time is 60 minutes. at 40%;

[0046]The alkaline biological compound enzyme, by weight ratio, comprises: 40% xylanase, 40% cellulase, 20% pectinase;

[0047] (3) Pre-steaming: In the pre-steaming chamber, add NaOH with a concentration of 30% ...

Embodiment 2

[0063] Embodiment 2 A kind of production method of bio-enzyme and alkali synergistically preparing chemical mechanical pulp

[0064] (1) Raw material pretreatment: Add poplar wood chips to pulp washing water for soaking and softening, add pulp washing water to wet the wood chips in the feeding tank by spraying, the temperature is 55°C, and the processing time is 35 minutes;

[0065] The pulp washing water is the waste water obtained in the press dehydration step of the process, the pH is 9.2, and the content of hydrogen peroxide is 0.85%;

[0066] (2) Biological enzyme treatment: the pretreated wood chips enter the alkaline biological enzyme storage tank for treatment, the treatment temperature is 35°C, and the treatment time is 70 minutes. After adding water and washing, they enter the thickening tank and dehydrate through inclined spirals to control the water content of the wood chips by 40%. ;

[0067] The alkaline biological compound enzyme, by weight ratio, comprises: 40...

Embodiment 3

[0094] Embodiment 3 A kind of production method of synergistically preparing chemical mechanical pulp with biological enzyme and alkali

[0095] (1) Raw material pretreatment: Add poplar wood chips into pulp washing water for soaking and softening, add pulp washing water to wet the wood chips in the feeding tank by spraying, the temperature is 70°C, and the treatment time is 35 minutes;

[0096] The pulp washing water is the waste water obtained in the press dehydration step of the process, with a pH of 9.9, and wherein the content of hydrogen peroxide is 0.9%;

[0097] (2) Biological enzyme treatment: the pretreated wood chips enter the alkaline biological enzyme storage tank for treatment, the treatment temperature is 40°C, and the treatment time is 60 minutes. %;

[0098] The alkaline biological compound enzyme, by weight ratio, consists of: 40% xylanase, 35% cellulase, 25% pectinase;

[0099] (3) Pre-steaming: In the pre-steaming chamber, add NaOH solution with a mass conc...

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Abstract

The invention provides a production method for preparing chemimechanical pulp through synergy of a biological enzyme and an alkali. The production method specifically comprises the steps of raw material pretreatment, biological enzyme treatment, primary extrusion defibering, secondary extrusion defibering, liquid medicine dipping, and bleaching. Wastewater generated by the process is adopted for pretreatment of wood chips, biological enzyme treatment is combined, so that residual chemicals are fully utilized, the wastewater discharge is reduced, the consumption of sodium hydroxide and peroxides in the subsequent bleaching process is greatly reduced, and the method has dual significance of environmental protection and reality. The chemimechanical pulp prepared by the production process is good in pulping quality, pulp ISO whiteness reaches 82.97-85.36, pulp tearing index reaches 4.24-4.35 N.mm < 2 > / g, tensile strength reaches 27.8-29.1 N.m / g, and pulp fibers are firmly combined.

Description

technical field [0001] The invention belongs to the field of pulping and papermaking, and in particular relates to a production method for synergistically preparing chemical mechanical pulp with biological enzymes and alkalis. Background technique [0002] With the rapid development of my country's papermaking industry and the rapid growth of total paper output, the insufficient supply of papermaking raw materials has become an important factor restricting the development of my country's papermaking industry. With the further growth of our country's economy and the continuous improvement of people's living standards, people's demand for paper products is also increasing. Only relying on high-quality wood raw materials is far from being able to meet market demand. [0003] Chemical-mechanical pulp has the advantages of high bulk and good stiffness. At the same time, its high fiber content makes it have unique properties, making chemical-mechanical pulp more and more widely us...

Claims

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Application Information

Patent Timeline
07 Jan 2020
Publication
CN110656525A
IPC
D21C5/00; D21C3/02; D21C3/26; D21C3/22; D21B1/16; D21C9/16; D21C9/10; D21H11/02
CPC
D21C5/005; D21C3/02; D21C3/26; D21C3/222; D21B1/16; D21C9/163; D21C9/1042; D21C9/1052
Inventors
吉兴香; 陈洪国