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Technology for preparing ryegrass slurry by pharmaceutical soak without boiling

A technology without cooking and wheat straw, which is applied in the pulping of cellulose raw materials, textiles, papermaking, papermaking, etc., can solve the problems of papermaking pollution of the environment at night, and achieve the effects of low wastewater treatment cost, reduced alkali consumption, and simple pulping process

Inactive Publication Date: 2007-06-13
刘长如 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the serious pollution of the environment in the dark night of papermaking and the problem that it cannot be completely cured, the present invention provides a pulping process of soaking wheat straw without cooking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] 1. Wheat straw pulping process

[0019] 1. Crushing and dispersing of wheat straw

[0020] The wheat straw after impurity removal is generally 3-5 cm. At this time, the wheat straw has softened, and the joints of the wheat straw have not been damaged, which is not good for soaking. The length of the joints exceeds one centimeter and cannot be soaked thoroughly. If soaked, the resulting The pulp has high hardness, too many fiber bundles are retained, and unfavorable miscellaneous cell groups such as high hemicellulose content remain in the pulp, which has a great impact on the output of the paper machine. After soaking and paper machine output production experiments, the decontaminated wheat straw must be thawed so as to meet the soaking requirements.

[0021] For the debonding of wheat straw, it is mainly to fully decompose the wheat straw knots, so that the breaking rate of wheat straw knots can reach more than 95%, so that good quality pulp can be obtained.

[0022]...

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PUM

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Abstract

The present invention is one digestion-free wheat straw-soaking pulp making process. The present invention treats wheat straw and similar papermaking material with the soaking chemical comprising sulfur 20-50 weight portions, magnesium carbonate 10-30 weight portions, aluminum hydroxide 10-30 weight portions and magnesia 30-60 weight portions. During soaking, the material consists of wheat straw in 100 weight portions, sodium hydroxide 5-15 weight portions, hydrogen peroxide 1-5 weight portions, the soaking chemical 0.1-1 weight portions and water 60-85 weight portions. Compared with traditional digesting pulp making process, the present invention has simple technological process, low production cost, high pulp quality, no waste water exhaust, high pulp yield and other advantages.

Description

1. Technical field [0001] The invention relates to the technical field of papermaking, in particular to a pulping process of soaking wheat straw without cooking. 2. Technical background [0002] my country is rich in wheat straw resources and has a long history of using wheat straw to make paper. At present, there are two types of wheat straw cooking equipment: steam ball intermittent cooking and horizontal tube continuous steaming. Law. Generally, the sulfate method is not used, and the final by-product of the process is colloidal black liquor, which accounts for more than 80% of the total papermaking pollution. At present, black liquor, the pollution source of wheat straw pulping, is still a major problem in the field of environmental protection in the world. [0003] The traditional ball steaming pulping method generally adopts high alkali and high temperature pulping method. In the process of wheat straw balling, although the wheat straw has been dedusted and screened,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C3/00
Inventor 刘长如袁海霞
Owner 刘长如
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