Apparatus for preparing refined cotton from cotton linter by bleaching

Abstract

The invention relates to the field of the preparation of refined cotton, and discloses an apparatus for preparing refined cotton from a cotton linter by bleaching. The apparatus comprises a stock impurity removal device, a cyclone separator, a press master, a presser, a crusher and a bleaching device, wherein the stock impurity removal device, the cyclone separator, the press master, the presser, the crusher and the bleaching device are arranged in sequence along a material trend; the bleaching device comprises a high-concentration mixer and a continuous oxygen bleacher which are arranged in sequence along the material trend. According to the apparatus for preparing the refined cotton from the cotton linter by the bleaching, the one-time pulping in a joint bleaching manner through adopting the high-concentration mixer and the continuous oxygen bleacher is achieved; a decoction process in the preparation process of the refined cotton is avoided; the production cost of the refined cotton is greatly decreased.

Description

technical field [0001] The invention relates to the field of refined cotton preparation, in particular to an equipment for preparing refined cotton by bleaching cotton linters. Background technique [0002] Cotton linter refers to the part of fiber that remains outside the cotton seed husk after binding cotton. The length of cotton linters is shorter than that of lint fibers, and its length is usually only 10 to 50 wt% of lint. It is mainly used in military industry, chemical industry, papermaking and cellulose derivatives. As a high-quality paper fiber raw material, it is mainly used in the production of household paper, banknote paper and paper for special technical purposes. [0003] The cellulose content of cotton linters exceeds 90wt%, and there are not many non-cellulose impurities. However, many foreign impurities are mixed in the process of production, processing, transportation, etc., which brings great difficulties to pulping. Therefore, the purpose of cotton li...

AI Technical Summary

Problems solved by technology

At the same time, under the conditions of high temperature and high pressure, the cellulose decomposes severely, resulting in a serious decrease in the degree of polymerization of cotton fibers and a low pulping yield.

On the other hand, currently cotton linters are generally bleached with chlorine. The bleaching process produces highly toxic chlorine-containing organic compounds, causing serious harm to human health and the ecological environment.

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