Method for preparing unbleached paper for dining table from crop straw by adopting biological enzyme and alkaline pulping

A technology of crop straw and alkaline pulping, applied in the field of papermaking, to achieve the effects of saving production costs, realizing comprehensive utilization, and saving manpower and material resources

Inactive Publication Date: 2016-10-12
NINGXIA ZIJINGHUA PAPER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, only bio-enzyme technology is used to produce corrugated base paper, and no process method has been found to combine bio-enzyme pretreatment with alkaline pulping and use oxygen delignification process to produce natural table paper

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0031] The specific embodiment of the technical solution of the present invention is two parts of biological enzyme pretreatment and alkaline pulping:

[0032] 1. Biological enzyme pretreatment.

[0033] 1.1 Wet preparation:

[0034] The crop stalks purchased from farmers are transported to the grass cutter and cut into 15-30mm long pieces. After being dedusted by the claw dust collector, they are transported by a belt conveyor and washed by a water washing machine and a hydraulic grass washing machine. After dehydration, until next process.

[0035] 1.2 Biological enzyme pretreatment:

[0036] The washed and dehydrated flakes that have been prepared are transported to the biological enzyme pretreatment bin by the belt conveyor, and the washed crop straw is subjected to biological enzyme pretreatment according to the pretreatment process, and the biological enzyme pretreated crop straw enters the single-screw extrusion Extruding machine, the dryness of the extruded crop str...

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Abstract

The invention relates to a method for producing uncolored table paper by pulping agricultural crop straws by biological enzyme and alkali method, belonging to the technical field of papermaking. The method includes two parts: bio-enzyme pretreatment of crop stalks and alkaline pulping and papermaking, wherein the bio-enzyme pre-treatment includes wet material preparation, bio-enzyme pre-treatment and extrusion treatment. Alkali pulping and papermaking include: batch cooking, coarse stock countercurrent washing, screening and purification washing, pulp refining, and papermaking. The living paper produced by the invention is uncolored table paper, and after countercurrent washing of coarse pulp, oxygen delignification is carried out to further remove lignin, so as to meet the conditions for producing uncolored living paper pulp. No bleaching process is required in the production process, which saves manpower, material resources and production costs, and no absorbable organic chlorine is produced, which is more environmentally friendly and healthier.

Description

technical field [0001] The invention belongs to the technical field of papermaking, in particular to a method for producing uncolored table paper by pulping biological enzymes and alkaline crop straws. Background technique [0002] There are many provinces and regions rich in straw raw materials in my country. In terms of quantity, non-wood fiber (including crop straw, rice straw, reed, and corn straw) resources are relatively rich. At present, the planting area of ​​straw crops in Ningxia Sichuan has reached 12.024 million mu, which can produce nearly 1.3 million tons of crop straw. The cooking process in today's paper mills is the process of leaching and removing lignin with chemicals. The general chemical pulping method not only needs to use various chemicals, but also has high cost and high energy consumption. However, the use of biological enzymes to degrade lignin and pretreat crop straws is simple and has no pollution to the environment. It degrades the lignin of cro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00D21C3/02D21H11/12
CPCD21C5/005D21C3/026D21H11/12
Inventor 冯福德杨淑芬杨洁徐广川
Owner NINGXIA ZIJINGHUA PAPER IND
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