Method for preparing bleached chemi-mechanical pulp for culture paper making by using cotton wood to process remainder

Abstract

The invention discloses a method for preparing bleached chemi-mechanical pulp fore culture paper making by using cotton wood to process remainder, which belongs to the field of pulp refining for making paper. The method mainly comprises presteaming, double screw extrusion, chemical impregnation, high-consistency pulp refining by a double-screw fiberizer, adding medicament in the pulp refining process, high-consistency stay, middle-consistency pulp refining and other steps. The pulp refining process adopts single-section double-screw extrusion and single-section alkaline hydrogen peroxide impregnation, has simple process flow and compact equipment, completely adopts home equipment and saves the investment. The chemi-mechanical pulp prepared by processing cotton wood remainder through the method has the characteristics of high bulk, strength, whiteness and the like, and is suitable for pulp to be used for paper making of medium-high grade culture paper. The method achieves the cleannessand high-efficiency utilization of the remainder of the cotton wood processing factories, and is suitable for medium-small paper making enterprises for producing culture paper dependent on outsourcing goods.

Description

Method for preparing bleached mechanical pulp for cultural paper compounding by using poplar wood processing residue technical field The invention belongs to the technical field of chemical-mechanical pulping, and in particular relates to a process for preparing bleached mechanical pulp for cultural paper compounding by utilizing poplar wood processing residues. Background technique my country is a big producer and consumer of paper and cardboard, ranking second in the world in terms of production and consumption of paper and cardboard. However, my country is a country that is seriously deficient in lignocellulosic resources. For a long time, due to the shortage of wood pulp, the quality of paper, cardboard and paper products in my country has been low, and structural contradictions have been prominent. Products have to rely heavily on imports, and a large amount of commercial wood pulp must be imported from abroad every year. Since 2002, my country's wood pulp imports hav...

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to overcome the defects of low raw material utilization rate and serious pollution in the pulping technology of poplar wood processing residues in the existing technology, and provide a kind of bleached mechanical pulp for making cultural paper by using poplar wood processing residues. The method is to fully adopt domestic equipment to realize the method of cleanly and efficiently producing bleached mechanical pulp for cultural paper blending by using poplar wood processing residues