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Pulping system for high-humidity-strength waste cardboard paper

A technology for cardboard paper and pulping, applied in pulp beating/refining methods, papermaking, paper recycling, etc., can solve the problems of unfavorable production cost savings, difficult dissociation of fibers, and low utilization rate of raw materials, so as to reduce grinding Reduce pulp energy consumption, improve swelling degree, and save production cost

Pending Publication Date: 2018-07-24
NINE DRAGONS PAPER TAICANG LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the presence of heavy sizing on the paper surface of high-wet strength containerboard, it is difficult to dissociate the fibers during the pulping and disintegration process, and the disintegration effect is poor, so that the high-quality fibers are lost together with the slurry, resulting in low raw material utilization and low production efficiency. The pulp yield is low, which is not conducive to the saving of production costs

Method used

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  • Pulping system for high-humidity-strength waste cardboard paper
  • Pulping system for high-humidity-strength waste cardboard paper
  • Pulping system for high-humidity-strength waste cardboard paper

Examples

Experimental program
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Embodiment

[0028] Such as image 3 As shown, the general waste paper box enters the continuous pulper for pulping to form a slurry; the slurry then enters the high-concentration slag remover to remove the coarse slag in the slurry, and then enters the first pressure screen for screening. Remove relatively small impurities, and then enter the grading screen forebay; the slurry enters the grading sieve from the grading sieve forebay, and the slurry is classified, and the slurry after grading through the grading sieve enters different fiber pools, and different fiber pools The pulp in the pulp enters the post-treatment system, and after being processed by the post-treatment system, the pulp that can be used for papermaking is formed. The high-humidity waste containerboard is pulped by a separate pulping system and then enters the grading screen pool, and the subsequent process is the same as that of ordinary containerboard.

[0029] Wherein, the continuous pulper is a kind of hydraulic pul...

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Abstract

The invention relates to a pulping system for high-humidity-strength waste cardboard paper. The pulping system comprises a continuous pulp shredder, a high-concentration slag separator, a first pressure screen, a classifying screen forebay, a classifying screen, a fiber tank, a post-treatment system and an independent pulp shredding system, the continuous pulp shredder, the high-concentration slagseparator, the first pressure screen, the classifying screen forebay, the classifying screen, the fiber tank and the post-treatment system are sequentially connected, and the independent pulp shredding system is used for shredding the high-humidity-strength waste cardboard paper and conveying the shredded pulp into the classifying screen forebay. The independent pulp shredding system is additionally arranged in the pulping system, solves the problem of difficulty in defibering the high-humidity-strength waste cardboard paper and improves pulping efficiency and pulping yield when the high-humidity-strength waste cardboard paper serves as raw materials to pulp, the utilization rate of the raw materials is increased, and production cost is saved.

Description

technical field [0001] The invention relates to the technical field of pulping and papermaking, in particular to a pulping system for high wet strength waste container board paper. Background technique [0002] As an important raw material for waste paper recycling, waste containerboard not only has good fiber quality, but also has low ash content and high paper strength. Among them, the high wet strength waste containerboard refers to the waste containerboard that still maintains a dry strength of more than 15% and can resist cracking or dissociation when the waste containerboard is damp or soaked in water. Due to the presence of heavy sizing on the paper surface of high-wet strength containerboard, it is difficult to dissociate the fibers during the pulping and disintegration process, and the disintegration effect is poor, so that the high-quality fibers are lost together with the slurry, resulting in low raw material utilization and low production efficiency. The pulp yi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/32D21B1/34D21D5/00D21D1/30
CPCD21B1/32D21B1/345D21D1/30D21D5/00Y02W30/64
Inventor 王夫亮韩冲杨文恒
Owner NINE DRAGONS PAPER TAICANG LTD
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