Physical waste paper deinking technology

The technology of deinking and physical method of waste paper is applied in the field of pulping and papermaking, which can solve the problems of polluting the environment, high cost, consumption of chemicals and heat energy, etc., and achieves low pulping cost, high pulp yield and good whiteness. Effect

Inactive Publication Date: 2013-06-05
刘长如 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional waste paper deinking technology and process have entered a dead end at the beginning, not only consuming a lot of chemicals and heat energy, but also producing waste water that is not easy to treat, complicated water treatment, high cost, and pollutes the environment.

Method used

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Examples

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Embodiment

[0019] A physical method of waste paper deinking process, taking several comprehensive waste papers such as various book papers, electrostatic copy papers, and double-sided printed thick ink propaganda newspapers as examples:

[0020] 1) Tearing: Use a shredder to tear up waste paper such as books, and tear it into pieces of different sizes. At this time, the ink on the waste paper has been cracked under the action of force.

[0021] 2) Deflagging: Use the transmission screw to send the shredded waste paper into the deflaking machine. The mechanism of the deflaking machine is to effectively decompose the shredded waste paper into semi-fibers or fibers. The ink on the waste paper is broken into tiny powders under the action of force, and most of them have fallen off from the fibers along with the paper-making filler.

[0022] 3) Refining: The decomposed semi-fiber and fiber raw materials fall into the pulp well, add water to stir, and send them to the refiner with a pulp pump....

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PUM

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Abstract

The invention relates to a physical waste paper deinking technology. The technology comprises the following steps: 1, shredding: shredding waste paper with a shredder to form fragments; 2, fluffing: fluffing the waste paper fragments by a fluffer to form semi-fibers or fibers; 3, defibrination: defibering the fluffed semi-fibers or fibers by a defibrination machine to form single fibers; 4, washing: washing fiber raw materials; and 5, water precipitation reuse: allowing washing water to flow to a precipitating pool and naturally settle to form clear water, and reusing the clear water in above defibrination and washing operations. The technology allows the clean and effective deinking process of various books, newspaper, double-sided thick-ink posters, static duplicating paper and the like to be completed through a physical method without various chemicals comprising a deinking agent, an enzyme or the like, the deinking degree reaches 98%, and the paper pulp obtained after washing has a good whiteness and a high yield; and the pulp preparation cost is low, the washing water can naturally settle to form the clear water without adding any water treatment medicines, and the water reuse has no influences on deinking, so sewage-free discharge is completely reached.

Description

technical field [0001] The invention relates to a waste paper deinking process by a physical method, which belongs to the field of pulp and paper making. Background technique [0002] my country is a big paper-making country and also the largest importer of waste paper. However, the traditional waste paper deinking technology and process has entered a dead end at the beginning. It not only consumes a lot of chemicals and heat energy, but also produces waste water that is not easy to treat. The water treatment is complicated and costly, and it still pollutes the environment. In order to save money on water treatment, some enterprises put it into the river after simple treatment, polluting the water body of the earth. Contents of the invention [0003] The purpose of the present invention is to provide a physical method for deinking waste paper without chemicals and heat energy, without carbon emission, low cost and clean pulping. [0004] Technical solution of the present...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/02
CPCY02W30/64
Inventor 刘长如闫喜军
Owner 刘长如
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