Bio-environmental pulping method for plant raw materials

Abstract

The invention provides a bio-environmental pulping method for plant raw materials. The method comprises the following steps: preparation of a composite bio-enzyme, enzymatic impregnation, metering, mixing, defibration, addition of the medium-temperature alkaline composite bio-enzyme, an enzymatic hydrolysis reaction, slurrying, latency fine grinding, and screening for obtaining an original color finished pulp; or scouring modification, oxygen bleaching, latency fine grinding, and screening for obtaining a bleached finished pulp. The bio-environmental pulping method achieves the purpose of applying a bio-enzyme enzymatic hydrolysis process with mild process conditions to obtain the high-quality papermaking pulp, and solves the technical problems of difficulty in treatment of agricultural straws and a papermaking pulping waste liquid, low yield and high cost.

Description

technical field [0001] This patent application relates to a pulping method for preparing high-quality fiber pulp by using fibrous natural plant biomass as the initial raw material, including various types of wood, crop straw, etc. Background technique [0002] Natural biomass plants are used as the initial raw material for the pulping production of paper fiber pulp, and the chemical cooking pulping method is still mostly used to obtain high-quality pulp. The chemical cooking method is characterized by the use of high temperature, high pressure, and high alkali process conditions to separate and obtain fiber components by cooking and softening raw materials. However, the chemical cooking pulping method is used for the pulping production of non-woody biomass raw materials, including non-woody biomass raw materials such as straw plants, rice and wheat straw, etc., due to the content of non-fiber components such as silicon in the non-woody biomass raw materials Large, resulting...

AI Technical Summary

Problems solved by technology

However, the chemical cooking pulping method is used for the pulping production of non-woody biomass raw materials, including non-woody biomass raw materials such as straw plants, rice and wheat straw, etc., due to the content of non-fiber components such as silicon in the non-woody biomass raw materials Large, resulting in high viscosity of pulping waste liquid, poor filterability, high energy consumption, and high environmental pollution pressure. Even if the waste liquid is recovered and treated by lime alkali and other methods, the high content of silicon in the waste liquid will significantly reduce the activity of lime and its usability. Poor fluidity, resulting in difficulty in transportation, fouling and blockage of the conveying pipe, is a major technical problem for the smooth operation of the production line

At present, although a variety of semi-chemical pulping methods and mechanical pulping methods have emerged, although these preparation methods have their own characteristics and effects, and have relatively mild pulping process conditions, they still face long production cycles, There are many technical problems such as large fiber loss, and the performance is uneven in terms of medicinal dosage, process complexity, energy consumption, investment cost and pulp quality, which is not satisfactory

Images