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Method for preparing chemical-mechanical pulp for fluting medium by using fresh empty fruit bunches

A technology for corrugated base paper and chemical machinery, which is applied in pulp beating/refining method, non-woody plant/crop pulp, papermaking, etc. problems such as low yield, to achieve the effect of clean and efficient comprehensive utilization, reduction of chemical consumption, and simple pulping process

Active Publication Date: 2013-05-15
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

For example, the patented empty palm fruit bunch methods with application numbers 01126541.8 and 200510050391.9 respectively adopt wet preparation and chemical pulping. During the pulping process, the water consumption and chemical consumption are large, and the pulping yield is low. Heavy pollution; the patents with application numbers 02145021.8 and 200510034091.1 respectively disclose pulping by blasting method. This method requires high-temperature and high-pressure resistant equipment, which requires large investment and energy consumption, and continuous production cannot be realized; application numbers are 200910021404.8 and 200810187589.5 respectively The mechanical pulping method disclosed in the patent of 2010, in which the fruit bunches are directly washed to remove oil, and the whole pulping process does not consider the removal of high-content non-fibrous components in the raw material, and the water consumption required for pulping is large, because there is no Targeted removal of residual fruit particles and high content of non-fibrous components contained in EFB raw materials will result in pulp with high content of non-fibrous fine components, which will inevitably lead to poor drainage and papermaking performance of pulp
Therefore, the use of EFB to produce paper pulp with qualified papermaking performance still has disadvantages such as high fiber impurity content.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The fresh empty palm fruit bunches are sent to the extruder with spikes through the belt conveyor, and the empty palm fruit bunches are squeezed and torn by the different speed ratios of the spikes, and then sent to the machine through the roller conveyor with a height difference. Drum slicer, cut EFB fibers into 3-5cm long and short materials, use the high-speed centrifugal force of the drum slicer to use palm fiber with residual fruit particles as fuel for biomass boilers, and use compression ratio for materials with less impurities Extruded by a 4:1 screw extruder to remove the moisture and residual oil in the fresh empty palm fruit bunches, and then sent to a vibrating sieve for screening to remove the non-fibrous skin that fell off the fiber surface during the screw extrusion process , the purified palm fiber is sent to the raw material bin of the pulping workshop; the material in the bin is sent to the straw washing machine through the belt conveyor for hot water w...

Embodiment 2

[0044] The fresh empty palm fruit bunches are sent to the extruder with spikes through the belt conveyor, and the empty palm fruit bunches are squeezed and torn by the different speed ratios of the spikes, and then sent to the machine through the roller conveyor with a height difference. Drum slicer, cut EFB fibers into 3-5cm long and short materials, use the high-speed centrifugal force of the drum slicer to use palm fiber with residual fruit particles as fuel for biomass boilers, and use compression ratio for materials with less impurities Extruded by a 4:1 screw extruder to remove the moisture and residual oil in the fresh empty palm fruit bunches, and then sent to a vibrating sieve for screening to remove the non-fibrous skin that fell off the fiber surface during the screw extrusion process , the purified palm fiber is sent to the raw material bin of the pulping workshop; the material in the bin is sent to the straw washing machine through the belt conveyor for hot water w...

Embodiment 3

[0046] The fresh empty palm fruit bunches are sent to the extruder with spikes through the belt conveyor, and the empty palm fruit bunches are squeezed and torn by the different speed ratios of the spikes, and then sent to the machine through the roller conveyor with a height difference. Drum slicer, cut EFB fibers into 3-5cm long and short materials, use the high-speed centrifugal force of the drum slicer to use palm fiber with residual fruit particles as fuel for biomass boilers, and use compression ratio for materials with less impurities Extruded by a 4:1 screw extruder to remove the moisture and residual oil in the fresh empty palm fruit bunches, and then sent to a vibrating sieve for screening to remove the non-fibrous skin that fell off the fiber surface during the screw extrusion process , the purified palm fiber is sent to the raw material bin of the pulping workshop; the material in the bin is sent to the straw washing machine through the belt conveyor for hot water w...

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Abstract

The method discloses a method for preparing chemical-mechanical pulp for fluting medium by using fresh empty fruit bunches, mainly aiming at the characteristics that the water content of the fresh empty fruit bunches is high, hard impurities such as residual palm fruit granules, sands and the like are carried in the fruit bunches and the palm silk surfaces of the empty fruit bunches contain more non-fiber surfaces; and on the basis of the technology process and the equipment configuration, the processing steps of granule removing, slicing, extruding, washing with water, pre-steaming, chemical soaking, pulping, washing and the like are performed gradually to materials. Before the pulp is formed, the non-fiber parts such as non-fiber surfaces with higher content on the fiber surface and the carried palm fruit granules in the EFP (empty fruit bunches) fiber raw materials are effectively removed as much as possible in the whole process and are used. The dosage of chemical product needed in the pulping process and the pollution load generated by pulping are effectively reduced, the paper pulp prepared by refining the palm fibers has the advantages of less dust, high strength and the like and is suitable for blending of the fluting medium; and by adopting the method, the clean and high-efficiency comprehensive utilization of the EFP raw materials in pulping and paper making is achieved.

Description

technical field [0001] The invention belongs to the technical field of pulping and papermaking, and in particular relates to a method for preparing chemical mechanical pulp for corrugated base paper by utilizing fresh empty palm fruit bunches. Background technique [0002] As an important economic crop in Southeast Asian tropical regions such as Malaysia and Indonesia, oil palm trees have a huge output of fiber raw materials as by-products. According to statistics, in the above-mentioned countries, the output of empty fruit bunches (EFB, empty fruit bunches) only reaches 40 million tons per year after the palm fruit is removed for oil extraction. Due to the high temperature and high air humidity in tropical areas, the fresh empty palm fruit bunches have a high moisture content (70%-75%), and the fiber surface is rich in non-fibrous skin (about 20%), which is not easy to store and easy to mold; in addition, There are also about 8-10% of palm fruit particles and silt left. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/12D21B1/02D21B1/06D21B1/34D21C1/02D21D1/20
Inventor 房桂干邓拥军盘爱享韩善明焦健丁来保李红斌梁芳敏沈葵忠施英乔李萍
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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