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OCC line residual pulp efficient recycling production method

A production method and slurry technology, applied in pulp beating/refining method, pulp dehydration, using microorganisms/enzymatic cellulose treatment, etc., can solve the problem that tailings cannot be effectively recovered, and achieve advanced process methods and equipment, tons Reduced pulp power consumption and high yield

Active Publication Date: 2017-01-04
LIANSHENG PAPER IND LONGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] For this reason, it is necessary to provide a high-efficiency recovery production method for OCC line slurry, which is used to solve the problem that a large amount of tailings in large paper mills cannot be effectively recovered

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] In this embodiment, a production method for efficient recovery of OCC line slurry comprises the following steps:

[0047] Low concentration tailings collection and transportation:

[0048] Pump the low-concentration tailings from the low-concentration heavy tailings collection tank at the end of the OCC line machine to the post-grinding tank with a slurry pump;

[0049] Fine screening tailings collection and transportation:

[0050] Pump the tailings from the fine screening tailings collection tank at the end of the OCC line machine to the slurry treatment line with a slurry pump;

[0051] Trench white water total slag collection and transportation:

[0052] The white water of the OCC line machine is recycled through the inclined screen of the sewage treatment plant, and the recovered slurry is thickened and then pumped to the slurry treatment line;

[0053] In the collection and transportation of the total slag discharge of the trench white water, after the total tr...

Embodiment 2

[0077] The difference between this embodiment and Embodiment 1 is:

[0078] Trench white water total slag collection and transportation:

[0079] The white water of the OCC line machine is recycled through the inclined screen of the sewage treatment plant, and the recovered slurry is thickened and then pumped to the slurry treatment line;

[0080] In the collection and transportation of the total slag discharge of the trench white water, after the total trench white water of the OCC line machine is recycled through the inclined screen of the sewage treatment plant, the recovered slurry is subjected to biological treatment. The specific steps of the biological treatment are:

[0081] Adjust the pH value of the recovered slurry to 11, adjust the temperature to 30°C, add preset weights of biological bacteria and biocatalysts to the recovered slurry, the biological bacteria are Bacillus, and the treatment time is 4 hours. Bacillus is used here for aquatic water purification, and ...

Embodiment 3

[0089] The difference between this embodiment and Embodiment 1 is:

[0090] Trench white water total slag collection and transportation:

[0091] The white water of the OCC line machine is recycled through the inclined screen of the sewage treatment plant, and the recovered slurry is thickened and then pumped to the slurry treatment line;

[0092] In the collection and transportation of the total slag discharge of the trench white water, after the total trench white water of the OCC line machine is recycled through the inclined screen of the sewage treatment plant, the recovered slurry is subjected to biological treatment. The specific steps of the biological treatment are:

[0093] Adjust the pH value of the recovered slurry to 12, adjust the temperature to 45°C, add preset weights of biological bacteria and biocatalysts to the recovered slurry, the biological bacteria are Bacillus, and the treatment time is 2 hours. Bacillus is used here for aquatic water purification, and ...

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Abstract

The invention relates to an OCC line residual pulp efficient recycling production method. The method comprises the steps of low-concentration tailing collecting and conveying, finely-screened tailing collecting and conveying, trench off-machine water total discharged residue collecting and conveying, tailing concentration, tailing pulp grinding, tailing mixing, diluting and concentration regulating, medium-concentration sand removing, fine screening, multi-tray concentration, pulp grinding and pulp storage. The step of trench off-machine water total discharged residue collecting and conveying specifically comprises the steps that total trench off-machine water of OCC line machines is recycled through an inclined screen of a wastewater treating plant, and recycled residual pulp is pumped into a residual pulp treating line after the concentration is regulated. Compared with the prior art, by means of development and application of key processes such as tailing collecting, concentration, re-grinding, diluting, sand removing, fine screening, concentration and fine pulp obtaining and key equipment improvement, fibers and recyclable fine fibers in tailings and filler are efficiently recycled, and the residue pulp treatment line is large in treatment amount and high in yield.

Description

technical field [0001] The invention relates to the technical field of pulping and papermaking production, in particular to a production method for efficiently recycling OCC line slurry. Background technique [0002] The output of a single production base of a modern large-scale packaging paper production enterprise is increasing. Every day, the OCC line produces a large amount of tailings at the end of the low-concentration slag remover, tailings at the end of the fine screen, and total slag discharged from the trench white water. Production example: The final tailings of these three items produced by the 5000T daily papermaking base are 350 tons dry per day, including about 170 tons of tailings at the end of the low-concentration slag remover, and the total discharge of tailings at the end of fine screening and trench white water About 180 tons. After the ash content of the tailing slag at the end of the five-stage slag remover group in the traditional process reaches 55-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21D1/30D21C9/18D21D5/18D21D5/02D21C5/00
CPCD21C5/005D21C9/18D21D1/30D21D1/303D21D5/02D21D5/18
Inventor 王贵敏陈光军覃本春李浩
Owner LIANSHENG PAPER IND LONGHAI
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