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Production process for making high-strength corrugated paper from waste paper

A production process and technology of corrugated paper, applied in the field of papermaking, can solve the problems of large amount of chemicals, difficulty in sludge treatment, high cost of sludge treatment, etc., achieve easy secondary use, save energy and time for refining, and improve physical Effects of morphology and chemical structure

Active Publication Date: 2019-08-02
东莞顺裕纸业有限公司
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  • Abstract
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Problems solved by technology

[0003] At present, the recycling of corrugated paper from waste paper needs to go through a series of steps such as pulping, screening, purification, liquid removal, washing, concentration, heat dispersion, rubbing, flotation, deinking, and bleaching. Disadvantages such as large consumption, low fiber recovery rate, large amount of chemicals, low production efficiency, large sludge discharge, difficult sludge treatment and high sludge treatment cost

Method used

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  • Production process for making high-strength corrugated paper from waste paper
  • Production process for making high-strength corrugated paper from waste paper
  • Production process for making high-strength corrugated paper from waste paper

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Embodiment Construction

[0060] The following are only preferred embodiments of the present invention, and therefore do not limit the protection scope of the present invention.

[0061] A production process for reproducing high-strength corrugated paper from waste paper, comprising the following steps,

[0062] In the shredding step, the recovered waste paper is put into a shredder for shredding to obtain waste paper scraps. Preferably, the maximum diameter of the waste paper scraps does not exceed 0.5 cm;

[0063] In the drying step, the waste paper scraps are put into a multi-layer belt dryer for drying treatment, and the moisture content of the waste paper scraps is controlled to be less than 0.5%;

[0064] In the ultrasonic electrostatic separation step, the waste paper scraps that have passed the drying step are quantitatively put into the ultrasonic electrostatic separation device through the quantitative delivery device 4 for ultrasonic electrostatic separation treatment, wherein,

[0065] The...

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Abstract

The invention discloses a production process for making high-strength corrugated paper from waste paper. The production process comprises the following steps: crushing, drying, carrying out ultrasonicelectrostatic sorting, repulping, diverting, carrying out step-by-step low-concentration dreg removal, carrying out step-by-step low-concentration filter pressing, carrying out step-by-step high-concentration dreg removal, carrying out distributed high-concentration filter pressing, diluting, carrying out composite pretreatment of primary slurry, pulping, screening, carrying out pulp blending, making and molding paper, carrying out intensification, drying and squeezing wet paper, carrying out surface gluing, drying finished paper, and finally coiling, thereby obtaining a finished product of corrugated paper. Compared with the prior art, the production process is capable of implementing targeted physical sorting on a waste paper material before the step of repulping, damage of paper makingfibers and amounts of chemical reagents can be further reduced, the production process is environmentally friendly, the treatment cost of paper making wastes can be reduced, the production efficiencyis improved, and the production cost of companies can be lowered.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a production process for reproducing high-strength corrugated paper from waste paper. Background technique [0002] Pulping and papermaking technology in the world today is developing towards reducing pollution, saving energy, water resources and making full use of waste paper fibers. Among them, the production of corrugated paper with waste paper as raw material is the production item chosen by most paper factories. [0003] At present, the recycling of corrugated paper from waste paper needs to go through a series of steps such as pulping, screening, purification, liquid removal, washing, concentration, heat dispersion, rubbing, flotation, deinking, and bleaching. It has disadvantages such as large consumption, low fiber recovery rate, large amount of chemicals, low production efficiency, large sludge discharge, difficult sludge treatment and high sludge treatment cost. C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H11/14D21B1/02D21C5/00D21C5/02D21F11/12
CPCD21B1/02D21C5/005D21C5/022D21F11/12D21H11/14Y02W30/64
Inventor 刘伟锋赖耀康刘志锋
Owner 东莞顺裕纸业有限公司
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