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Low pressure herbal material blasting pulp making process

A raw material, low pressure technology, applied in the field of pulping, to achieve the effects of low energy consumption, high whiteness and high yield in refining

Inactive Publication Date: 2005-03-30
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, a large amount of foreign exchange is consumed to buy imported pulpboard and waste paper; on the other hand, during the harvest season, the fields are full of thick smoke, and precious fiber resources are burned in vain into air pollutants.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] Take sisal as an example:

[0029] ——Raw material pretreatment: Add the following dosage of drugs to grass raw materials (the dosage of drugs is calculated relative to the absolute dry weight of raw materials): Sodium hydroxide 5%

[0030] Sodium sulfite dosage 6%

[0031] JFC Penetrant 0.1%

[0032] Stir at room temperature for 2 hours;

[0033] ——Middle and low pressure treatment: put the pretreated material into the explosion tank, and treat it at 200°C and 1.8mpa pressure for 3 minutes;

[0034] ——Spraying: the raw material is blasted and sprayed into the receiving container instantly;

[0035] ——2 stage refining

[0036] ——Beating: beating degree 50°SR

[0037] Obtain the pulp properties as follows: breaking length 7.5KM, yield 90%, whiteness 45%, tear index 7.26mN.m 2 / g, burst index 3.17kPa.m 2 / g.

[0038] The waste from sisal processing is used in this way, and its pulp can be used to produce high-performance paper or board. T...

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Abstract

The low pressure herbal raw material blasting and pulp making process includes raw material pre-treatment of adding alkali, sodium sulfide and assistant to herbal raw material with stirring at normal temperature to 90 deg.c high temperature and high pressure treatment of the material in a blast tank at 110-210 deg.c and 0.5-1.9 MPa for 1-15 min; and blowing to blast the material instantaneously to a receiving container. The herbal pulp thus produced has strength equivalent to that of chemical pulp and the present invention has high yield, low power consumption, low cost and high pulp whiteness.

Description

technical field [0001] The invention relates to pulping technology in the field of papermaking. In more detail, it is a low-pressure explosion pulping method for grass raw materials. Background technique [0002] Grass raw materials are important fiber resources in my country. Straw pulp is the main raw material of pulp in my country at present. However, most of the pulping of grass raw materials adopts chemical methods, and a large amount of pollutants are discharged every year. It is very difficult technically and economically to treat waste liquid from chemical pulping of grass raw materials. Therefore, due to environmental protection requirements and profit reasons, a large number of grass raw material paper mills have been closed or are on the verge of closing. [0003] The paper industry is currently facing a very embarrassing situation. On the one hand, it consumes a lot of foreign exchange to buy imported pulpboard and waste paper; on the other hand, during the h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C3/02
Inventor 胡键黄干强詹怀宇郑炽嵩刘焕彬
Owner SOUTH CHINA UNIV OF TECH