Method of producing bleached chemi-mechanical pulp from Eucalyptus sheets

Abstract

The invention discloses a method of producing bleached chemi-mechanical pulp from Eucalyptus sheets. The method includes the steps of preparing raw material, extruding the raw material for dewatering, namely using a single-screw extruder to extrude and dewater the Eucalyptus sheets so as to obtain multi-gap loose thread-like sponge capable of absorbing chemicals, and performing in order impregnate-bleaching, high-concentration pressurized grinding, post-grinding full mixing and bleaching of fiber bundles and liquid medicine, secondary high-concentration pressurized grinding and impurity removal so as to obtain high-whiteness high-bulkiness pulp. The method is simpler, good in producing effect and energy saving and environment friendly.

Description

technical field

[0001] The invention belongs to the technical field of chemical mechanical pulping, in particular to a method for preparing bleached mechanical pulp by using eucalyptus chips. Background technique

[0002] my country is a big country in the production and consumption of paper and cardboard, and the production and consumption of paper and cardboard both rank first in the world. The paper industry is one of the basic industries of the national economy, which is closely related to social and economic development and people's lives. It is an internationally recognized "never-failing" evergreen industry. With the rapid development of my country's economy, the demand for paper and paper products is increasing rapidly. According to the statistics of the Food and Agriculture Organization of the United Nations (FAO), the per capita consumption of paper and paper products in my country was only 16.8kg in 1980, increased to 32.8kg in 2000, and reached about 73kg in 201...

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