Book and cultural paper pulping method

Abstract

The invention discloses a book and cultural paper pulping method which comprises a pulping step and a pulp mixing step. The book and cultural paper pulping method specifically comprises the following steps: (1) pulping: (a) preparing waste paper deinking pulp, namely pulping waste paper, coarsely screening for removing impurities, carrying out flotation deinking for removing ink particles, and entering a heat dispersion system after passing through a heavy impurity deslagging system and a primary multi-stage fine screening system, so that the sizes of large ink, dust and adhesives are reduced and the concentration reaches 28-32%; enabling the heat-dispersed pulp to enter a bleaching tower for oxidation bleaching; entering a rear flotation deinking system after bleaching, and separating the ink particles in the pulp; carrying out reductive bleaching to remove colored substances in the pulp until the concentration reaches 10%; mixing the pulp in a pulp storage tower; (b) preparing wood pulp, namely pulping a wood pulp block through a hydrapulper until the concentration is 4%-5%, enabling the pulp to enter an unloading pulp pool until the concentration reaches 3.5%, processing the pulp through a high-concentration grit catcher, processing the pulp through a disc mill and then entering the slurry pool for mixing; and (2) mixing pulp, namely mixing the pulp from the waste paper deinking pulp and the wood pulp at a ratio of 70%-80% to 20%-30% (v / v), and fully mixing until the concentration reaches 3.5%.

Description

technical field [0001] The invention relates to a pulp preparation method, in particular to a pulping method for cultural paper for books and periodicals. Background technique [0002] Book cultural paper is mainly used for offset printing of various publications, such as books, magazines, documents, etc., and is a kind commonly used in our daily life. At present, the raw material of cultural paper for books and periodicals in the prior art is all wood pulp or wood pulp plus straw pulp. The former has high cost and greatly destroys forest resources, and the whiteness of the produced product is too high, which can reach 95 to 105 degrees. According to scientific testing, the whiter the paper, the stronger the light reflected under the fluorescent lamp, and the more harmful it is to people's vision health, so there is a hidden danger of affecting people's vision; the latter is not only expensive, but also the waste water and waste residue produced by straw pulp are seriously p...

AI Technical Summary

Problems solved by technology

At present, the raw material of cultural paper for books and periodicals in the prior art is all wood pulp or wood pulp plus straw pulp. The former has high cost and greatly destroys forest resources, and the whiteness of the produced product is too high, which can reach 95 to 105 degrees. According to scientific testing, the whiter the paper, the stronger the light reflected under the fluorescent lamp, and the more harmful it is to people's vision health, so there is a hidden danger of affecting people's vision; the latter is not only expensive, but also the waste water and waste residue produced by straw pulp are seriously polluted

Images