Production method and application of complex enzyme liquid for chemi-mechanical pulping

Abstract

The invention discloses a production method of a complex enzyme liquid for chemi-mechanical pulping. The production method is characterized by comprising the following steps: weighing various component enzymes, mixing and compounding the various component enzymes in a compounding tank, preventing corrosion, inspecting, packaging and storing in a storeroom at 5 DEG C, wherein the various component enzymes comprise alkaline pectinase, xylanase, mannose and ligninase. The application of the complex enzyme liquid in chemi-mechanical pulping is realized as follows: before steaming paper-making raw materials, adding the complex enzyme liquid to the paper-making raw materials through a metering pump, uniformly mixing the complex enzyme liquid with the paper-making raw materials for enzymatic hydrolysis under enzymatic treatment conditions that the temperature is 40-60 DEG C and enzymatic hydrolysis duration is 30-240 minutes; after the enzymatic hydrolysis, performing following processes as normal. The production method, through coupling synergistic effect of multiple enzymes of the complex enzyme liquid in chemi-mechanical pulping, can be used for improving the whiteness of pulp by 2-5% and reducing the pulp yellowing under a condition of guaranteeing high yield and low cost of pulping; the production method can be used for reducing the dosage of chemical raw materials by 20-30% and reducing the pulp grinding energy consumption by 18-30%; meanwhile, the production method can be used for reducing pollution and improving the pulp quality.

Description

technical field [0001] The invention relates to a pulping of papermaking raw materials, in particular to a chemical mechanical pulping method of papermaking raw materials, in particular to a production method and application of a compound enzyme liquid for chemical mechanical pulping. Background technique [0002] Chemithermomechanical pulp (CTMP or BCTMP) technology has developed rapidly since the first production line was built in the 1970s, and APP / APMP and PRC were successively developed in the late 1980s and 1990s. In the late 1980s, Scott Paper invented this process for the first time, and called the pulp made by this process Alkaline Hydrogen Peroxide Pulp (APP). Andritz later developed its own process and patented it under the name Alkaline Hydroperoxide Mechanical Pulp. Both are essentially the same. The existing APP / APMP factory adds a hydrogen peroxide bleaching tower behind the refiner, forming a hybrid process that combines APP / APMP and BCTMP, that is, P-RCAPM...

AI Technical Summary

Problems solved by technology

[0006] The above-mentioned patented method is only a bleaching method for chemical-mechanical pulp, and cannot solve the problems of high energy consumption and serious equipment wear in the process of chemical-mechanical pulping, and only uses an enzyme preparation of xylanase, an enzyme preparation Although the use of the enzyme is helpful for pulp bleaching and preventing pulp yellowing, it cannot solve other factors that cause pulp yellowing due to the single type of enzyme and the limitation of the specificity of the enzyme preparation.