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

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...

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.