Method for preparing all cotton stalk cellulose by adopting mechanical-active oxygen method

Abstract

The invention relates to a method for preparing all cotton stalk cellulose for construction, paper making and other applications by taking cotton stalks as raw materials and adopting a mechanical-active oxygen method. The method comprises the following steps: tearing, crushing and kneading the cotton stalks the impurities of which are removed into a velvet shape, adding impregnation liquid for pre-oxidation and stirring the mixture; grinding and defibering, grinding and concentrating the materials subjected to the grinding and defibering, simultaneously adding active oxygen defibrination bleaching liquid for bleaching; carrying out pressurizing turbulence final bleaching on high-concentration pulp subjected to grinding concentration and bleaching and preparing all cotton stalk cellulose pulp for making paper; and concentrating, filtering, dewatering or drying the all cotton stalk cellulose pulp to obtain the all cotton stalk cellulose for construction and other industries. The method has high pulp yield, effectively eliminates barky and rotten patches of the all cotton stalk cellulose, ,is free from distillation, cannot generate pulping black liquid seriously polluting the ecological environment and has the characteristics of good whiteness, obvious energy-saving effect, simple process, convenient operation, little investment, low cost and the like.

Description

1. Technical field [0001] The invention relates to a method for preparing cotton stalk fibers by using cotton stalks as raw materials and applying a "mechanical-active oxidation method". Specifically, cotton stalks are used as raw materials to produce fibers for construction, papermaking and other uses by "mechanical-activated oxidation method". The method is also applicable to using other gramineous plant stalks, reed stalks, bamboo, shrubs, etc. as raw materials to produce the fibrous substances for the above-mentioned purposes. 2. Background technology [0002] Forest is an important ecological resource of the earth. In addition to preventing soil erosion and regulating climate, it is also responsible for absorbing carbon dioxide and releasing oxygen. However, the world's forest resources are currently growing at an annual rate of 700×10 8 m 2 Forest resources are used to produce wood pulp and paper, which is one of the important reasons for the accelerated decline of ...

AI Technical Summary

Problems solved by technology

[0008] It is precisely because the characteristic of cotton stalks is that the bast and stems are integrated, and the stiff spots and rot spots on the bast are not easy to separate. For a long time, it has not been possible to produce all-cotton stalk fiber pulp that is used to make paper and replace wood fiber pulp.

In recent years, although there are very few enterprises that use cotton stalks as raw materials to produce cotton stalk fiber pulp that can be used for papermaking, they have the following disadvantages: 1. The process is complex, requiring a lot of equipment and large investment; 2. High energy consumption, there are still environmental pollution problems; 3. Can not produce white cotton stalk fiber pulp, that is to say, it cannot be used for the production of white paper

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