Physical waste paper deinking technology

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...

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.