Ultrasonic high-strength mechanical pulping method

Abstract

The invention relates to an ultrasonic high-strength mechanical-chemical pulp preparation method which can solve the problems of low pulp quality, low production efficiency and high cost. The method comprises the steps that wood sheets are cleaned, softened via ultrasonic pretreatment and dehydrated, and then enter a section of twin screw extrusion fluffer to be made into wood wool or small wood strips; the wood wool or small wood strips are sent into a second section of twin screw extrusion fluffer to be fluffed into wood fiber bundles; the wood fiber bundles are sent to an ultrasonic reaction bin for ultrasonic reaction treatment so that the wood fiber bundles are changed into wood pulp; the wood pulp is sent to a pulp washer for washing and purifying; waste water is sent to a waste water treatment system for discharge; the purified wood pulp is extruded and compressed by a thickener to form wet pulp with a mass concentration of 10%. The method remarkably improves the extrusion and tearing effect in a subsequent stage and the final pulp forming quality; a high-consistency bleaching power and a high-consistency disc mill are not needed and cooperative pulp treatment of ultrasonic waves and oxygen is employed, so that the technological process is simplified, the investment is saved, the quality of pulp is improved, the production cost is reduced, and the economic and social benefit are huge.

Description

technical field [0001] The invention belongs to the technical field of papermaking and pulping, and relates to a pulping method, in particular to an ultrasonic high-strength mechanical pulping method. Background technique [0002] Alkaline hydrogen peroxide mechanical pulp is a kind of chemical mechanical pulp made from hardwood as the main pulping raw material by extrusion, flaking, impregnation and refining. Its pulping process is developed on the basis of the pulping process of bleached chemical thermomechanical pulp. It combines the advantages of the pulping process and production equipment of chemical thermomechanical pulp and bleached chemical thermomechanical pulp. The pulping process of "combining pulping and bleaching at the same time into one" has become the biggest feature of the alkaline hydrogen peroxide mechanical pulping process. It has the advantages of less investment in equipment, small floor space, compact process flow, low production energy consumption, ...

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Problems solved by technology

[0006] In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to provide an ultrasonic high-strength mechanical pulping method, which can effectively solve the problems of poor pulp quality, low production efficiency and high cost

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