Waste paper deinking and stickies control technique

Abstract

The invention relates to a waste paper deinking and stickies control technique which comprises the steps of crushing pulp, high concentration deslagging, coarse screening, fine screening, primary flotation, thermal dispersion, whitening, post-flotation, washing and filtering, wherein 1) adding soap deinking agent KLS-100 in the crushing pulp process; adding the soap deinking agent KLS-100 and polyethers surface active agent PA300 mixed deinking agent in the processes of primary flotation and post-flotation; and 2) in the washing process, adding optimyze 525 bio-enzyme, simultaneously adding resin dispersing agent B2281 while using the bio-enzyme, and controlling the pH value of sizing agent to be 7.0-7.5 in the adding process. The technique is used for waste paper deinking pulp, obviously improves the deinking efficiency, leads the whiteness of the deinking pulp to be increased to 74% ISO from 70% ISO, and reduces the length of printing ink stickies stuck on a paper machine scraper to be 5cm from 30cm, thus obviously reducing the times of cutting off paper of the paper machine, and improving the quality of the paper and the operating efficiency of the paper machine.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and in particular relates to a waste paper deinking and sticky substance control process. Background technique [0002] With the improvement of people's awareness of environmental protection, in order to protect forest resources, more and more attention has been paid to the recycling of waste paper. The key to utilizing waste paper is to solve the problem of waste paper deinking and sticky matter obstacles, especially with the development of printing technology, there are many types of printing inks, among which the use of water-based inks and laser printing inks increases the deinking of waste paper Difficulty, the traditional method of using a soap deinking agent for deinking is difficult to meet the deinking quality of the above-mentioned waste paper. In addition, because waste paper contains more sticky substances such as adhesives, hot melt adhesives, tapes, etc., the produced deinked p...

AI Technical Summary

Problems solved by technology

The key to utilizing waste paper is to solve the problems of waste paper deinking and stickies, especially with the development of printing technology, there are many types of printing inks, among which the use of water-based inks and laser printing inks increases the deinking of waste paper Difficulty, the traditional deinking method using a soap deinking agent is difficult to meet the deinking quality of the above waste paper

In addition, because waste paper contains more adhesives, hot melt adhesives, tapes and other viscous substances, the produced deinked pulp contains more stickies, which increases the difficulty of making deinked pulp for paper machines.