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Method for producing corrugated base paper pulp by utilizing scrap materials of fibre board

A technology of corrugated base paper and leftover waste, which is applied in the field of pulp and papermaking, which can solve the problems of inability to realize clean and efficient utilization of fiberboard leftovers, large fiber damage, and large amount of chemicals, so as to reduce ineffective consumption, reduce damage, and use less Effect

Inactive Publication Date: 2012-09-19
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Purely mechanical pulping, although there is a high pulping yield, but due to the greater damage to the fiber during the refining process, the strength of the pulp is poor, and the pulp can only be used for the production of C-grade container boards; The use of semi-chemical pulping, due to the large amount of chemicals used, the pulping yield is low, only about 60%, and the pollution in the pulping process is relatively serious, which cannot realize the clean and efficient utilization of fiberboard scraps

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Fiberboard scraps are crushed and evenly soaked in hot water for 4 hours; the soaked fiberboard scraps are steamed at a steam pressure of 0.2-0.3Mpa for 10 minutes, and then screw-extruded. Add sodium hydroxide solution with a concentration of 30% by mass at the back of the press, and the dosage is 3% (for absolute dry materials). Using the high-concentration mixing effect of the extrusion screw, the chemical solution and the crude fiber are evenly mixed, and at the same time Using the heat energy generated by high-concentration extrusion mixing, the material and liquid medicine enter the subsequent impregnator at a higher temperature to complete the chemical reaction. The reaction conditions are: the temperature is 85 o C, the time is 30 minutes; the fiber material that has completed the chemical reaction is subjected to high-consistency refining with a disc refiner, and the pulp fibers after grinding are subjected to delamination treatment. Adding 50% of the slurry to...

Embodiment 2

[0040] Fiberboard scraps are crushed and evenly soaked in hot water for 4 hours; the soaked fiberboard scraps are steamed at a steam pressure of 0.2-0.3Mpa for 30 minutes, and then screw extruded. The concentration of sodium hydroxide solution at the back of the press is 30%, and the dosage is 5% of the total mass of the dry material. Using the high-concentration mixing effect of the extrusion screw, the chemical solution and the crude fiber are evenly mixed, and at the same time, the high-concentration The heat energy generated by extrusion and mixing makes the material and liquid medicine enter the subsequent impregnator at a higher temperature to complete the chemical reaction. The reaction conditions are: the temperature is 90 o C, the time is 60 minutes; the fiber material that has completed the chemical reaction is subjected to high-consistency refining with a disc refiner, and the pulp fibers after grinding are subjected to delamination treatment. Adding 50% of the slur...

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Abstract

The invention discloses a method for producing corrugated base paper pulp by utilizing scrap materials of a fibre board. The method comprises the main steps of: preparing, soaking, steaming, spirally extruding, chemically processing, grinding, eliminating, washing and purifying materials. A majority of free formaldehyde in the raw material is removed and recycled possibly in a pulping process; a little of chemical solution is added from the rear part of a twin screw extruder, and the liquid medicine is uniformly mixed with the fibre and then subjected to mild chemical reaction by utilizing high-concentration mixing action of an extruder and heat energy generated in extruding and mixing processes, so that the high pulping yield is kept, the damage to the fibre in a grinding process is alleviated, the excellent physical strength of the pulp fibre is ensured, and the pollution load in the pulping process is reduced at the same time.

Description

technical field [0001] The invention belongs to the technical field of pulping and papermaking, and in particular relates to a method for producing pulp for corrugated base paper by fiberboard edge waste. Background technique [0002] Fiberboard is a man-made panel produced with wood fibers such as wood residues, wood processing residues, and small-diameter wood from artificial fast-growing industrial raw material forests as the main raw materials. my country's fiberboard production has experienced nearly 30 years of development, and it is one of the important components of my country's forestry industry. With the continuous expansion of the application range of fiberboard, fiberboard is widely used in many industries and fields such as construction industry, furniture, laminate flooring, audio equipment, decoration and decoration, packaging and automobile industry in my country. my country's fiberboard production provides basic material guarantee for the development of fur...

Claims

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Application Information

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IPC IPC(8): D21B1/32D21C5/02
CPCY02W30/64
Inventor 邓拥军房桂干韩善明焦健丁来保盘爱享梁芳敏李红斌施英乔沈葵忠李萍
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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