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 easy operation, low cost and stable performance. Effect

Inactive Publication Date: 2011-09-14
HUBEI BAOTA PAPER
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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Embodiment Construction

[0049] Such as figure 1 , A waste paper deinking pulping method, including the following steps:

[0050] 1) The process of pulping with a high-concentration hydraulic pulper; after manual sorting, the waste paper is hoisted into the high-consistency hydraulic pulper by a hanging basket, added with hot water and chemical auxiliary materials, and then gently crushed and discharged Enter 1# pulp pond.

[0051] 2) Steps to remove impurities with a high-concentration cleaner and a low-frequency vibrating frame hole screen; the slurry in the 1# slurry tank is pumped into the high-concentration cleaner, and the tailings enter the sand tray, sinking heavy impurities such as staples Then return to 1# slurry tank to form a loop. Most of the slurry enters the low-frequency vibrating frame-type perforated screen, after sieving out impurities such as plastic filaments, enters the 2# slurry tank.

[0052] 3) Steps to remove impurities with a multi-stage multi-stage low-concentration heavy-weight...

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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 utilizing a 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 processing, 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 country's sustainable development strategy. However, waste paper contains a large number of various ink particles, stickies, other impurities, etc., which seriously affect the whiteness, dustiness, printability and production stability of the paper, greatly reducing the quality of the product and affecting the economy. Benefits and promotion and utilization. [0003] The main form of the waste paper deinking process commonly used in the world is: a pulping process with multi-stage thermal dispersion, multi-stage flotation, and multi-stage bleaching. The idea is to disperse part of the ink particles and stickies in the waste paper pulp. Just make it invisible to the naked eye. Because these processes require the use o...

Claims

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Application Information

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