Low-ink pulping method through waste paper recycling

Abstract

The invention discloses a low-ink pulping method through waste paper recycling. The method includes the following steps that 1, waster paper is collected, and beating is conducted to obtain shredded paper sheets; 2, the shredded paper sheets are subjected to micro-fermentation treatment; the shredded paper sheets obtained after micro-fermentation treatment are soaked and subjected to floating selection and ink removal; 4, after sediment is washed and impurities are removed, dehydration treatment is conducted; 5, materials obtained after dehydration are subjected to high-pressure steam-cooking and sterilization and softening; 6, the materials obtained after steaming and softening are subjected to extrusion impregnation and kneading homogenization; 7, digestion, fiber separation and defibering are conducted in sequence; 8, after purification and concentration, the final materials are stored for standby application. When the waste paper high in fiber quality is recycled for pulping, a good ink removal effect can be obtained through mutual complementation and synergistic interaction of pre-micro-fermentation treatment, post-micro-fermentation treatment and subsequent working sections.

Description

technical field [0001] The invention belongs to the field of pulping, and in particular relates to a pulping method. Background technique [0002] Traditional pulping refers to the production process of using chemical methods, mechanical methods or a combination of both to dissociate plant fiber raw materials into natural or bleached pulp. The commonly used process is to crush the plant fiber raw materials, cook, wash, screen, bleach, purify, and dry the pulp. [0003] Pulp prepared by various methods is used to prepare paper products in human life. However, since pulp raw materials are mostly prepared from natural organic materials, due to the impact of resources, environment and many other aspects, raw material shortages, energy crises and environmental problems Problems such as pollution are becoming more and more prominent, thus posing huge tests and challenges to limited natural resources. [0004] Reusing waste paper for resource reuse for pulping not only greatly al...

AI Technical Summary

Problems solved by technology

[0005] However, some high-quality waste paper, such as magazines, has excellent fiber quality, but there are problems such as special printing methods, special printing ink components, and large ink particles that are difficult to separate from the fibers, because the deinking effect is not ideal. It can only be discarded for reuse or downgraded for reuse, which greatly restricts the application and development of waste paper reuse for pulping