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Pulp making technology through performing biological enzyme softening lignin removal twice combined with mechanical method

A bio-enzyme and delignification technology, which is applied in the direction of using microorganism/enzyme cellulose treatment, cellulose pulp post-treatment, pulp bleaching, etc., can solve the problems of high energy consumption, air pollution, environmental pollution, etc., and achieve operability Strong, targeted, simple and effective effect

Active Publication Date: 2016-07-20
上海锴晨实业有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0010] Biological pulping is one of the technological directions of detergent pulp. The pulp prepared by biological pulping has long fiber, high pulping rate, strong dismantling resistance, and the cost per ton of pulp is much lower than that of chemical pulp and mechanical pulp. However, due to biological bacteria The conditions for the cultivation, selection and pulping process are too high, there are many problems such as large production fluctuations, uneven material handling, long processing time, and low production efficiency. Currently, biopulping is difficult to industrialize.
[0011] At present, my country's paper industry is facing three major problems, which will restrict the healthy development of the paper industry to a certain extent for a long time in the future, that is, the shortage of fiber raw materials, high energy consumption and serious environmental pollution. If the generated waste water and waste steam are not treated effectively and in time, it will bring huge environmental disasters
Thus the country adopts effective means to close a large number of substandard papermaking enterprises, but it also causes a surplus of straw as a raw material for papermaking. In the face of lack of convenient and effective new straw utilization technology, farmers burn straw and bring new even worse air pollution

Method used

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  • Pulp making technology through performing biological enzyme softening lignin removal twice combined with mechanical method

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Experimental program
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Effect test

Embodiment 1

[0035] A two-time bioenzyme softening delignification combined with a mechanical pulping process is carried out sequentially according to the following steps:

[0036] Step 1) Material preparation process 1: cutting, screening and washing of reed raw materials.

[0037] Step 2) The first biological enzyme softening presoaking process 2: fully mix the material, water, compound osmotic softener and compound biological enzyme preparation, react for 1 hour, the reaction temperature is 40°C, and the dosage of the compound osmotic softener is 5 kg / ton The amount of compound biological enzyme preparation is 3 kg / ton of material, and the mass ratio of water to material is 10:3.

[0038] Composite penetration softener is prepared from the following raw materials by weight percentage: sodium alkylsulfonate 5%, triethanolamine oleic acid soap 8%, nonylphenol polyoxyethylene (10) ether 5%, defoamer XD-4000.5% , stearic acid polyoxyethylene (6) ether 20%, polyoxyethylene (5) sorbitan soap...

Embodiment 2

[0050] A two-time bioenzyme softening delignification combined with a mechanical pulping process is carried out sequentially according to the following steps:

[0051] Step 1) Material preparation process: cutting, screening and washing of reed raw materials.

[0052] The material preparation process is as follows: the reed raw material is continuously fed into the grass cutting machine through the conveyor belt, cut into grass pieces, and the grass pieces and impurities are sent to the double cone dust collector by air or conveyor belt to remove the heavier impurities and separate the lighter ones. Impurities, the purified grass pieces are sent to the hydraulic grass cutter by the conveyor to tear the grass pieces, and the shredded grass material, together with water, passes through the sieve plate of the hydraulic grass cutter and is pumped from the bottom of the hydraulic grass cutter to the inclined spiral dehydration machine dehydration, and then through the double-cone d...

Embodiment 3

[0065] A two-time bioenzyme softening delignification combined with a mechanical pulping process is carried out sequentially according to the following steps:

[0066] Step 1) Material preparation process: cutting, screening and washing of reed raw materials.

[0067] The material preparation process is as follows: the reed raw materials are put into the hydraulic grass cutter, the whole grass stalk is broken and the grass leaves are shredded, and the shredded grass and water pass through the sieve plate of the hydraulic grass cutter from the bottom of the hydraulic grass cutter. It is pumped to the oblique screw dehydrator for dehydration, and then further dehydrated by the double-cone disc press to complete the material preparation. The dehydrated sewage is purified and removed for recycling; the rope is removed through the rope removal device installed above the hydraulic grass cutter, and heavy impurities are removed. The debris left on the sieve plate enters the debris ca...

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Abstract

The invention provides a pulp making technology through performing biological enzyme softening lignin removal twice combined with a mechanical method. The pulp making technology comprises the following steps: step 1) material preparation; step 2) biological enzyme softening preimpregnation for the first time; step 3) mechanical pulp making and thread separation; step 4) biological enzyme softening lignin removal and bleaching for the second time; step 5) fine purification of made pulp. According to the pulp making technology disclosed by the invention, a composite permeating softener and a composite biological enzyme preparation are used for performing the preimpregnation working procedure and the bleaching working procedure, and a new pulp making technology through biological enzyme softening lignin removal twice combined with the mechanical method is obtained. According to the pulp making technology disclosed by the invention, the conventional alkaline pulp making technology, the conventional mechanical pulp making technology and the biological pulp making technology which is in the process of exploration are changed, so that the defects of conventional pulp making technologies are overcome, the method is simple and effective, the pertinence is high, the maneuverability is high, high-temperature cooking is not needed in the lignin degradation process, hazardous substances such as caustic soda are not added, and black liquor is not produced.

Description

technical field [0001] The invention belongs to the technical field of pulping and papermaking, and in particular relates to a black liquor-free bio-enzyme combined mechanical pulping process. Background technique [0002] Paper is the most commonly used item in our daily life. Whether we are reading, reading newspapers, writing or drawing, we have to come into contact with paper. In the production of industry, agriculture and defense industry, paper is also inseparable. Today, it is simply unthinkable without paper. Paper is a powerful tool and material in exchanging ideas, disseminating culture, developing science and technology and production. Looking back at history, this important substance was invented by the working people of the Han nationality in ancient China. Papermaking, compass, gunpowder, and printing are known as the four great inventions of ancient Chinese science and technology, and they are outstanding contributions made by the Chinese people to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00D21C9/10D21C9/16
CPCD21C5/005D21C9/1063D21C9/163
Inventor 李树泉
Owner 上海锴晨实业有限公司
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