Paper-making technique employing bio-fermentation pulping method instead of chemical pulping technique

Abstract

The invention discloses a paper making craft which replaces the chemical pulp making with biological fermentation pulp making, comprising process sections of pulp making and paper making. The procedures can be described as follows: (1) material preparation: fiber plants are grinded; (2) dissociation of the fiber: the grinded fiber plants are sterilized through steaming and boiling; after being cooled, mould that can decompose cellulose and lignin is added in; then the mixture is evenly stirred and put into a fermentation tank to be fermented; when the fiber plants are dissociated fluffy, the paper pulp is made. Since a plurality of chemical treating procedures are avoided due to the spare of chemical source materials, more than twenty procedures in previous paper making process are reduced into only several procedures, therefore, the paper making procedures are greatly simplified and a large amount of producing materials and energy is saved; thus the paper making craft has the advantages of greatly reduced production cost, source-saving and energy-saving effects.

Description

technical field [0001] The invention relates to a papermaking process, in particular to an environment-friendly, high-efficiency and low-cost papermaking process in which the chemical pulping process is replaced by a biological fermentation pulping process. Background technique [0002] The existing papermaking process includes pulping, papermaking, surface sizing, processing and other process sections. Among them, pulping and papermaking are the basic processes of paper structure in the papermaking process, and surface sizing and processing belong to the deep processing of papermaking. process. [0003] The pulping section includes: raw material selection→cooking and separating fibers→washing→bleaching→washing and screening→concentrating or making pulp into flakes→reserving for later use; [0004] The papermaking section includes: loose pulp → impurity removal → fine pulp → beating → preparation of various additives → mixing of paper stock → flow of paper stock → head box ...

AI Technical Summary

Problems solved by technology

[0006] (1) Pollution of the environment: A large amount of alkaline wastewater (black liquor) will be produced during the production process. If it is directly discharged into nature, it will cause serious environmental pollution such as water pollution and soil compaction. This makes the paper industry a polluting industry

[0007] (2) Corrosion equipment: the above method will consume a large amount of acid, alkali, and salt, and the strong acid and strong alkali used will corrode production equipment such as steaming balls

[0008] (3) High energy consumption: due to the use of strong acid and strong alkali to treat pulping raw materials and repeated washing with a large amount of water after the bleaching stage, it consumes both electricity and water

[0009] (4) Increased production cost: In order to reduce pollution, the black liquor needs to be recycled. Not only the investment in recycling equipment is large, but also the operating cost of pollution control equipment is high, resulting in an increase in production cost

[0010] (5) The utilization rate is low: the utilization rate of the raw materials processed by the prior art is 40-45%

[0011] (6) Long production time: due to many production processes, it takes a long time

In the pulping process of papermaking, people have begun to apply biological fermentation to improve the pollution problem, but the existing biological fermentation papermaking method is usually an improvement of the chemical method, and cannot completely cancel the existing chemical pulping process. Therefore, there is still a lot of room for development in terms of environmental protection, production efficiency and production cost.

Images