Biological accumulation pulping method

Abstract

The invention relates to a biological accumulation pulping method. The biological accumulation pulping method is characterized in that the biological accumulation pulping method comprises the following steps: cutting a pulping raw material into sections with the lengths of 4-5cm; carrying out screening and dust removal on the cut raw material; inputting the raw materials subjected to dust removal into a container; adding an aqueous solution of 0.5-0.6 potassium hydroxide according to the mass ratio of solid to liquid being 1:6; soaking the raw materials at the temperature of over 65DEG C and normal pressure for over 2 hours to enable the raw materials to quick absorb water and swell; inputting the swollen raw materials into an extrusion machine for removing water and rolling threads, wherein the thickness of the threads is 0.8-1.5mm; conveying the materials into a biological bacterial suspension pool, soaking the materials for over ten minutes, fishing and leaching; conveying the leached materials to a degradation pool for stacking fermentation; degrading lignin; sealing the upper end of the degradation pool with a plastic film and preserving moisture and temperature; controlling the temperature in the pool between 35 and 40DEG C and maintaining the temperature for 10-15 days; and pulping. The biological accumulation pulping method has the advantages of simple process, smooth flow, strong practicability, energy economization, water economization, and zero discharge and zero pollution in the pulping industry.

Description

Technical field: [0001] The invention relates to a bioaccumulation pulping method, which belongs to the technical field of paper pulping. Background technique: [0002] In the papermaking industry, it can be divided into two parts: pulping and papermaking. Pulping is the front end of papermaking. First, the process and technology of decomposing raw materials into pulp, and then making pulp into paper through a paper machine. [0003] In the traditional pulping process and technology, pulping production seriously pollutes the environment. It is a process of decomposing lignin under high temperature, high pressure and high alkali conditions to obtain cellulose. High temperature and high pressure reach 170-180℃, high energy consumption; large water consumption, about 100 tons per ton of pulp; high alkali (caustic soda) up to 26-40%, and various other chemicals, react with lignin at high temperature , generate a large amount of black liquor, which is the chief culprit of pollu...

AI Technical Summary

Problems solved by technology

[0005] At present, the main problem in pulping production is the waste liquid polluting the environment. The pollution can be reduced through the current feasible environmental protection new technology and equipment, but the pollution cannot be eliminated, only the pollution can be reduced

Only part of the caustic soda can be recovered through large-scale environmental protection equipment, but the production cost of the enterprise is increased, the profit is greatly reduced, the profit is meager, and even a loss

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