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Method for producing chemical fiber pomace with fiber as raw material

A plant fiber and chemical fiber pulp technology, which is applied in fiber raw material processing, cellulose pulp post-processing, raw material separation, etc., can solve the problems that pulp cannot meet the requirements of chemical fiber pulp, consume tree resources, and the environment, and achieve the goal of cooking The effect of shortening time, shortening time, and improving efficiency

Inactive Publication Date: 2007-06-06
湖南吉湘生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the pulp prepared by these methods cannot meet the requirements of chemical fiber pulp
Moreover, the plant fiber raw materials used are mainly trees, which consume a large amount of tree resources and cause a series of environmental problems.

Method used

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  • Method for producing chemical fiber pomace with fiber as raw material
  • Method for producing chemical fiber pomace with fiber as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The plant fiber raw material used is bamboo. The processing steps of the preparation method are as follows:

[0047] (1) Raw material processing: the bamboo is cut into a specified size;

[0048] (2) Lye pre-impregnation: fully mix the bamboo material with the lye, the amount of alkali in the lye is 8% of the absolute dry raw material in terms of NaOH. The liquid ratio is 1:3, the pre-impregnation time is 3 hours, and the temperature is 60°C;

[0049] (3) Extrude the raw materials: use a double-helix variable-pitch squeezer. The ratio of the average value of the forward helical pitch to the reverse helical pitch is 1.75, and the product obtained in step (2) enters from the feed inlet of the rubbing squeeze machine, and the discharge temperature of the slurry after rubbing is 100 ° C. The number of pulp machines connected in series is 3;

[0050] (4) Cooking the pulp after rubbing and extrusion: adopt oxygen-alkali method for cooking. The amount of alkali added in t...

Embodiment 2

[0058] The used plant fiber raw material is bamboo, and all the other conditions are the same as in Example 1. The difference is that the lye pre-soaking process is completed in the process of rubbing and squeezing in the present embodiment, and the liquid ratio is 1: 1. In the lye The amount of alkali is 12% of the absolute dry raw material in terms of NaOH; the ratio of the average value of the forward helical pitch to the reverse helical pitch is 1.8, the number of presses connected in series is 2, and the output of the slurry after rubbing and squeezing is 1.8. The temperature is 80°C, and the oxygen-alkali method is used for cooking. The amount of alkali added in the vertical steamer is 18% of the absolute dry pulp in terms of NaOH, and the liquid ratio is 1:2. 2 o 2 The dosage is 3% of the absolute-dry slurry, and the temperature is raised to 120°C for cooking and kept for 70 minutes. The quality of the prepared chemical fiber pulp fully meets the requirements of the fi...

Embodiment 3

[0060] Used plant fiber raw material is bamboo, and all the other conditions are identical with embodiment 2, in rubbing the pulp, liquid ratio 1: 4, the consumption of alkali in the described lye is 20% to absolute dry raw material in NaOH, forward spiral The ratio of the average value of the screw pitch to the reverse screw pitch is 1.5, the number of presses in series is 4, the discharge temperature of the slurry after rubbing is 140°C, and the alkali method is used for cooking, and the amount of alkali used is calculated by NaOH. Dry pulp 8%, cook and heat up to 160 ° C for 120 minutes. The quality of the prepared chemical fiber pulp fully meets the requirements of the first-class product in FZ / T51002-1998.

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Abstract

The present invention relates to a method for producing chemical fibre pulp by using plant fibre as raw material. Said method includes the following several steps: raw material treatment, making the treated raw material undergo the processes of rubbing and extruding, cooking, washing, removing sand and bleaching treatment. It is characterized by that in the preparation process of said chemical fibre pulp a screw extruding machine and a rubbing-extruding machine are adopted.

Description

technical field [0001] The invention relates to a preparation method for producing chemical fiber pulp by using plant fibers as raw materials, in particular to a preparation method for producing chemical fiber pulp by using a screw extrusion device. Background technique [0002] As a raw material for the textile industry, chemical fibers are growing day by day. Plant fiber pulp is an important raw material for the preparation of chemical fibers. Plant raw materials that can be used to prepare plant fiber pulp include cotton linters, bamboo, wood, hemp, and others such as bagasse and straw. The traditional method of preparing chemical fiber pulp generally needs to go through cooking, washing, acidification, dehydration and drying. Because the cooking process takes a long time, and a large amount of chemical agents need to be added during cooking, a large amount of black liquor is produced after cooking and washing, which seriously pollutes the environment. In order to avoi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C3/02D21B1/34D21C7/00D21C9/00
Inventor 宋德武郑书华岳福升李振峰孙同会薛振军范梅欣张焕志
Owner 湖南吉湘生物科技有限公司
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