Waste paper pulping fine screening tailing treatment technology

A technology for processing and fine-screening tailings, applied in fiber raw material processing, textile and papermaking, etc., can solve the problems of waste of resources, low efficiency, large amount of waste paper pulping and slag discharge, etc., to ensure the purification effect and bonding strength. reduced effect

Inactive Publication Date: 2019-10-15
SHANYING INT HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problems of large amount of slag discharge, low efficiency and waste of resources in waste paper pulping in the prior art, the present invention provides a waste paper pulping fine screen tailings treatment process, which includes the following steps:

Method used

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  • Waste paper pulping fine screening tailing treatment technology

Examples

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Effect test

Embodiment 1

[0040] (1) Send the waste paper pulping tailings into the transition tank 1, adjust the concentration to 1%, and then pass through a section of fine sieve with a pressure screen with a sieve gap of 0.1mm to obtain a section of good pulp and a section of tailings, and a section of good pulp enters the removal The slag remover is further screened and purified, the pulp concentration of the slag remover is 0.8%, and the pulp feed pressure is 200kPa;

[0041] (2) One section of fine pulp passes through the medium concentration standpipe 1, wherein the incoming pulp concentration is 2%, and the outgoing pulp concentration is 0.8%, and one section of tailing pulp is sent to the second stage fine screen with a sieve gap of 0.1mm to obtain the second stage of fine pulp and Second stage tail slurry;

[0042] (3) The second-stage good pulp is returned to the first-stage fine screen for further processing; the second-stage tailing pulp is sent to the last stage fine screen with a sieve g...

Embodiment 2

[0046] (1) Send the waste paper pulping tailings into the transition tank 1, adjust the concentration to 3%, and then pass through a section of fine sieve with a pressure screen with a sieve gap of 0.15mm to obtain a section of good pulp and a section of tailings, and a section of good pulp enters the removal The slag remover is further screened and purified with a pulp concentration of 1.2% and a pulp feed pressure of 350kPa;

[0047] (2) One section of good pulp passes through the medium concentration standpipe 1, wherein the incoming pulp concentration is 4%, and the outgoing pulp concentration is 1.2%, and one section of tailing pulp is sent to the second stage fine screen with a sieve gap of 0.15 mm to obtain the second stage good pulp and Second stage tail slurry;

[0048] (3) The second-stage good pulp is returned to the first-stage fine screen for further processing; the second-stage tailing pulp is sent to the final stage fine screen with a sieve gap of 0.2 mm to obta...

Embodiment 3

[0052] (1) Send the waste paper pulping tailings into the transition tank 1, adjust the concentration to 1%, and then pass through a section of fine sieve with a pressure screen with a sieve gap of 0.1mm to obtain a section of good pulp and a section of tailings, and a section of good pulp enters the removal The slag remover is further screened and purified with a pulp concentration of 1% and a pulp feed pressure of 300kPa;

[0053] (2) One section of fine pulp passes through the medium concentration standpipe 1, wherein the incoming pulp concentration is 3%, and the outgoing pulp concentration is 0.81%, and one section of tailing pulp is sent to the second stage fine screen with a sieve gap of 0.15 mm to obtain the second stage of good pulp and Second stage tail slurry;

[0054] (3) The second-stage good pulp returns to the first-stage fine screen for further processing; the second-stage tailing pulp is sent to the final stage fine screen with a sieve gap of 0.25mm to obtain ...

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Abstract

The invention relates to the fields of pulping and papermaking, and concretely relates to a waste paper pulping fine screening tailing treatment technology. The technology comprises the following steps: (1) waste paper pulping fine screening tailings are fed into a transition tank 1, and then goes through a primary fine screen to obtain a primary good pulp and a primary tail pulp, and the primarygood pulp enters a residue remover; (2) the primary good pulp goes through a medium-consistency stand tube 1, and the primary tail pulp is fed into a secondary fine screen to obtain a secondary good pulp and a secondary tail pulp; (3) the secondary good pulp returns to the primary fine screen, and the secondary tail pulp is fed into an end fine screen to obtain a third good pulp and a third tail pulp; (4) the third good pulp returns to the secondary fine screen, the third tail slurry is fed into a transition tank 2, and then is sequentially processed by a fluffer, a medium-consistency stand tube 2 and a flotation tank to obtain a fourth good pulp and residues; and (5) the fourth good pulp returns to the transition tank 1 and is processed, and the residues are fed into a waste tank. The technology can reduce the residue discharge amount of the waste paper pulping fine screening section by 10-20% on the basis of ensuring the quality of the pulp.

Description

technical field [0001] The invention relates to the field of pulping and papermaking, in particular to a waste paper pulping fine screen tailings treatment process. Background technique [0002] Due to the different types of paper and cardboard produced, the process requirements of waste paper pulping are different, but in a word, the process of waste paper pulping mainly includes waste paper shredding, purification, screening, concentration, dispersion and other processes. The screening process is divided into a coarse screening section and a fine screening section. The coarse screening section only discharges a small amount of recyclable fiber, but in order to meet the process requirements of the papermaking section, the amount of recyclable fiber in the slag discharge of the fine screening section accounts for 0.8-1.5% of the processing capacity. , accounting for 1-2% of the cost of copying. As an indispensable equipment in the fine screening section of waste paper pulpi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21D5/06D21D5/18D21D5/16
CPCD21D5/06D21D5/16D21D5/18
Inventor 陈学萍张先荣宋杰查胜刘召强
Owner SHANYING INT HLDG CO LTD
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