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Method for wastepaper deinking and pulping

A technology for deinking and pulping waste paper, which is used in the processing of waste paper, paper making, paper recycling, etc. It can solve the problems of low paper whiteness, high water consumption and high dustiness, and achieve high opening ratio, low operating costs, low cost effect

Inactive Publication Date: 2012-08-22
HUBEI BAOTA PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the cost of this process is low, it consumes a lot of water, the whiteness of the paper is low, the dust is high, and the pollution is serious.

Method used

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  • Method for wastepaper deinking and pulping
  • Method for wastepaper deinking and pulping
  • Method for wastepaper deinking and pulping

Examples

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Effect test

Embodiment Construction

[0049] Such as figure 1 Among them, a waste paper deinking pulping method comprises the following steps:

[0050] 1) The step of pulping with a high-consistency hydraulic pulper; after manual selection, the waste paper is hoisted by a crane and put into the high-consistency hydraulic pulper. After adding hot water and chemical auxiliary materials, it is gently crushed and put into Enter 1# slurry pool.

[0051] 2) The step of removing impurities with high-consistency slag remover and low-frequency vibrating frame-type hole screen; the slurry in the 1# slurry tank is pumped into the high-concentration slag remover, and the tailings enter the settling pan to sink heavy impurities such as staples Back to the 1# slurry tank to form a loop. Most of the slurry enters the low-frequency vibrating frame hole screen, and after screening out impurities such as plastic filaments, it enters the 2# slurry pool.

[0052] 3) Steps to remove impurities with multi-stage multi-stage low-concent...

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Abstract

The invention relates to a method for wastepaper deinking and pulping, comprising the following steps of: (1) pulping by utilizing a high consistency aquapulper; (2) removing impurities by utilizing a high consistency slag remover and a low frequency vibrating frame type hole sieve; (3) removing the impurities by utilizing a multilevel multistage low consistency heavy slag remover, a multilevel multistage gooey removing machine and a low frequency vibrating frame type slot sieve; (4) removing the impurities by utilizing a multilevel flotation cell; and (5) removing the impurities by utilizinga gravity type rotary screen concentrator and a high speed pulp washer. By means of the steps, wastepaper deinking and pulping can be realized with lesser equipment investment and lower energy consumption. The method provided by the invention integrates the combination of the equipment and the processes and has the advantages that the requirements of the wastepaper deinking and pulping and the paper purification are completely satisfied; the equipment investment is greatly saved; the power consumption is reduced; the operation cost is saved; and the purposes of high efficiency, high quality, low consumption, economy and applicability are achieved.

Description

technical field [0001] The invention relates to the field of waste paper pulp treatment, in particular to a waste paper deinking pulping method with low energy consumption and low cost. Background technique [0002] Waste paper recycling is an important part of the national sustainable development strategy. However, waste paper contains a large number of various ink particles, stickies, and other impurities, which seriously affect the whiteness, dustiness, printability and production stability of the paper, greatly reduce the quality of the product, and affect the economy. benefits and promotional use. [0003] The main form of waste paper deinking process commonly used in the world is: a pulping process with multi-stage heat dispersion, multi-stage flotation, and multi-stage bleaching. The idea is to disperse a part of ink particles and stickies in waste paper pulp , making it invisible to the naked eye. Because these processes require the use of a large number of high-e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C5/02D21D5/06
CPCY02W30/64
Inventor 王晓华
Owner HUBEI BAOTA PAPER
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