New process for producing alkaline hydrogen peroxide mechanical pulp by double scrwe extruding method

A technology of twin-screw extrusion and hydrogen peroxide, which is applied in the direction of cellulose raw material pulping, pulp bleaching, pulp beating/refining methods, etc. , Unstable slurry concentration and other problems, to improve the final pulp quality, improve the extrusion tearing effect, and ensure the effect of refining quality
CN1587502AInactive Publication Date: 2005-03-02TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Publication Date
2005-03-02
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The present invention is improved double screw extruding pulp producing process of alkali hydrogen peroxide mechanical pulp (APMP). The technological process includes water washing spill, steam digestion, hot water or hot alkali pre-treatment, treating in the first screw extruding breaker beater, reaction in the first reaction compartment, treating in the second screw extruding breaker beater, reaction in the second reaction compartment, milling in the first high concentration mill, milling in the second high concentration mill, sieving and purification, concentration, pulping pond treatment and other steps. Compared with traditional APMP, the present invention has similar quality and the advantages of simplified technological process, saving in investment and power consumption, less water consumption and lower waste water treating load. The present invention is suitable for producing APMP with different timber material, bagasse, etc.
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Description

technical field

[0001] The invention relates to a pulping process of chemical mechanical pulp, in particular to a new pulping process of alkaline hydrogen peroxide mechanical pulp (APMP) by twin-screw extrusion. Background technique

[0002] Alkaline peroxide mechanical pulp (APMP) is a kind of chemomechanical pulp made from hardwood as the main raw material for pulping by extrusion, flaking, impregnation and refining. Its pulping process is developed on the basis of BCTMP pulp (bleached chemical thermomechanical pulp) pulping process, and brings together CTMP pulp (chemical thermomechanical pulp) and BCTMP pulp (bleached chemical thermomechanical pulp) in Based on the advantages of pulping process and production equipment, the pulping process of "combining pulping and bleaching into one, and completing the bleaching process while pulping" has been created. This pulping process has become the largest pulping process of APMP pulp. features. It has the advantages of less inv...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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