Pulping technique for straw fibre

Abstract

The invention discloses grass series fiber pulping technology. It includes preprocessing, once and secondary steam boiling. Its advantages are that it can reduce environment pollution that the discharged black liquor can be reduced by 50% per ton; silicon content can be reduced by 50%; water can be saved by 50%; the formed slurry has light color, high brightness, low hardness, high strength, easypulping and bleaching.

Description

Grass fiber pulping process This application is Chinese patent application 200510090868.6, the original application date was August 18, 2005, the original application number: 200510090868.6, and the invention name of the original application: divisional application of grass fiber pulping process. technical field The invention relates to a pulping process of grass fiber raw materials, which belongs to the technical field of papermaking industry. Background technique As we all know, whether grass fiber raw materials can become paper-making raw materials for the sustainable development of human beings is a problem of concern to all countries in the world. Compared with wood fiber raw materials, it has many disadvantages, such as its harvesting, transportation, and storage require a lot of labor, the collection radius of raw materials is small, the quality of paper is poor, and environmental problems are serious. After analysis, the reasons are as follows: the collection an...

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Problems solved by technology

3. Due to the high content of silicon and carbohydrates in the raw materials, the viscosity of the black liquor is high and the recovery is difficult

4. Grass fibers (now) contain a large number of miscellaneous cells, which pose a series of hazards to papermaking

Therefore, there is no feasible pulping process of grass fiber in my country at present, and we should start from the basic national conditions of our country as soon as possible to develop a kind of pulping process that can not only improve the quality of straw pulp, but also reduce the amount of waste liquid treatment and waste water. The grass pulping process, which is difficult for liquid treatment, is a major problem in the current papermaking technology