Low pressure herbal material blasting pulp making process

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 normaltemperature 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...

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.