New pulping process of chemical mechanical pulp (CEMP) employing oil palm EFB high concentration extrusion displacement method

Abstract

The invention provides a new pulping process of chemical mechanical pulp (CEMP) employing oil palm EFB high concentration extrusion displacement method and the invention relates to a pulping process of CEMP, in particular to a pulping process of alkaline hydrogen peroxide mechanical pulp (CEMP) employing oil palm EFB high concentration extrusion displacement method. The invention adopts the following technical scheme: the process flow of the pulping process comprises the following procedures: water washing palm fibre, vapor-steaming, pretreating with hot water or hot alkali, sending to a double-screw extrusion kneader 1, sending to a reaction cabin 1, sending to a double-screw extrusion refiner 2, sending to a reaction pipe 2, high concentration grinding in first section, medium concentration grinding in second section, sending to a latency chest, screening and cleaning, sending to a thickener and a slurry-forming pool and the like; a double-screw extrusion kneader is used to completethe pulping process and the pulping and bleaching liquid medicines are separately poured in the double-screw extrusion kneader 1 and the double-screw extrusion refiner 2. By using the pulping processof the invention, the device investment can be reduced by about 40% compared with the prior art and the pulping process can save about 20% of energy, thus reducing the production cost. High concentration treatment is used to treat fiber materials so as to reduce the dosage of water for pulping and the wastewater treatment load and benefit the environment protection.

Description

Technical field: [0001] The invention relates to a pulping process of chemical mechanical pulp, in particular to a pulping process of oil palm EFB high-consistency extrusion displacement alkaline hydrogen peroxide mechanical pulp (CEMP). Background technique: [0002] At present, foreign pulping technologies are mainly alkaline method, ammonium sulfite method, neutral sodium sulfite method and semi-chemical method. Most of the raw materials for pulping are wood and a small amount of straw pulp. These traditional papermaking and pulping technologies have a large amount of black liquor discharged during the cooking process, which has caused serious environmental pollution. However, the current transformation of papermaking and pulping technology is centered on the treatment of black liquor. Therefore, it is necessary to equip The alkali recovery system and sewage treatment equipment require a large investment in equipment, which brings investment burdens to enterprises and in...

AI Technical Summary

Problems solved by technology

However, the existing APMP pulping process cannot achieve the desired effect due to the extrusion and tearing of the fiber raw material due to the selected single-screw extruding deflaker, which leads to the impregnation of the fiber raw material in the pulping solution. The defect that the treatment cannot achieve the required effect, and at the same time, the impregnator often brings the pulping liquid into the reaction chamber, which leads to the instability of the slurry concentration in the reaction chamber and affects the quality of the subsequent refining section.

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