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Non-wood raw material clean pulping method

A raw material and pulping technology, applied in pulp beating/refining method, raw material separation, fiber raw material treatment, etc., can solve the problems of difficult recycling of waste liquid, large water consumption, low pulping rate, etc., and achieve recycling , Reduce water consumption and reduce environmental pollution

Inactive Publication Date: 2013-08-14
王新军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the existing problems of low pulping rate, large water consumption, low whiteness and difficult recycling of waste liquid in the pulping of non-wood raw materials, the present invention provides a clean pulping method for non-wood raw materials

Method used

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Experimental program
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specific Embodiment approach

[0015] The specific implementation of the pulping process provided by the invention is as follows:

[0016] (1) Raw material pretreatment: Before chemical mechanical pulping of non-woody raw materials, pulping agents are directly added to hot water to achieve the effect of penetrating and softening non-woody raw materials. The pulping agents are special agents for pretreatment, raw materials and aqueous solutions The liquid ratio is 1:6, the temperature is 60-80°C, and the pretreatment time is 30-40min.

[0017] (2) Kneading and splitting: the raw materials are pretreated and dehydrated and then enter the double-helix kneading machine. The double-helix kneading machine uses compression force and shear force to make the raw material fibrous and split the cells longitudinally (axially) without fragments. These forces It can generate enough heat to soften lignin and create good conditions for smooth fiber separation. Since the temperature is much lower than the vitrification tra...

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Abstract

The invention provides a non-wood raw material clean pulping method. Main agents used in the invention comprise a bio-enzyme, an alkaline salt, a surfactant-1, a surfactant-2, an oxidant and the like. The non-wood raw material pulping method comprises a step 1 of raw material pretreatment, a step 2 of kneading devillicate, a step 3 of pulping dipping, a step 4 of defibering pulping; a step 5 of pulp refining, a step 6 of enhanced bleaching, a step 7 of screening, and a step 8 of wastewater reuse, wherein the above pulping agents are used in the step 1 and the step 3. The pulping agents provided in the invention are utilized to pulp non-wood raw materials, and the non-wood raw materials mainly comprise cotton stalks, Caragana microphylla, Salix cheilophila, bamboos, reeds and the like. Compared with traditional alkaline pulping methods, the pulping method provided by the invention has the advantages of substantial yield increase, great whiteness increase, realization of recycling the pulping agents, reduction of the consumption of chemical agents, and reduction of the environmental pollution.

Description

technical field [0001] The invention belongs to the field of pulping and papermaking, and is particularly suitable for papermaking and pulping of non-wood raw materials such as cotton stalks, caragana, salix, bamboo, straw and reeds. Background technique [0002] As people's demand for paper continues to increase, the problems of raw material shortage, energy shortage and environmental pollution that restrict the development of the paper industry have become more prominent. Due to limited wood resources, non-wood raw materials such as cotton stalks, caragana, salix, bamboo, straw, and reed have become important papermaking raw materials. The traditional wheat straw soda chemical pulping process includes high temperature and high pressure caustic soda cooking, black liquor extraction, washing, sieving, bleaching and other steps. This process requires a large amount of water and is not easy to recycle waste liquid, resulting in serious environmental pollution problems. . Peo...

Claims

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Application Information

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IPC IPC(8): D21C1/00D21C1/10D21C5/00D21B1/34D21D1/20D21C9/16
Inventor 王新军
Owner 王新军
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