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Method for preparing natural color bamboo pulp

A technology of natural bamboo pulp and bamboo, applied in pulp beating/refining method, textile and papermaking, raw material separation and other directions, can solve the problems of difficult biochemical water in the middle section, high cost, large investment, etc., and achieve cost saving and simple process flow , the effect of good fiber quality

Inactive Publication Date: 2016-01-20
XINJIANG GUOLIYUAN INVESTMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional alkali method and sulfate method are used for pulping, and alkali recovery equipment must be installed, which requires a large investment and high cost, and the middle water is difficult to biochemically

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Bamboo slices are sent to a rotary cutter, cut into sections with a length of 40-50mm and a diameter of 2-3mm, and then use a cylindrical sieve to remove impurities and fines, and set aside;

[0019] (2) After the material section is metered by the screw, it is sent to the continuous steamer with a belt conveyor. According to the absolute dry material section per ton, add 2-2.5% potassium hydroxide, 1.5-1.8% sodium sulfite and 1.5-2% Sodium tripolyphosphate, at 135-140°C, the ratio of solid to liquid is 1:4.5, cook for 115-120min;

[0020] (3) After the pulp obtained by cooking is dehydrated by screw, it is sent to a twin-screw refiner for rubbing and separating to obtain coarse pulp, and then washed to obtain natural bamboo pulp.

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Abstract

The invention discloses a method for preparing natural color bamboo pulp. The method comprises the following steps: using a rotary cutter to cut bamboo in material sections in length of 40-50 mm and diameter of 2-3 mm; sending the material sections into a digester, counting for dry weight of the material sections, adding 2-2.5% potassium hydroxide, 1.5-1.8% sodium sulfite, and 1.5-2% sodium tripolyphosphate, at temperature of 135-140 DEG C, cooking for 115-120 min, then, sending the material sections into a double-screw grinder to grind and divide, to obtain coarse pulp, then washing to obtain natural color bamboo pulp. The method is high in pulping yield, and ratio of BOD to COD of a mid-stage effluent is high, and the mid-stage effluent is readily biodegradable.

Description

technical field [0001] The invention relates to a method for preparing uncolored bamboo pulp. Background technique [0002] China is one of the origins and distribution centers of bamboo plants in the world. It is the country with the richest bamboo resources in the world. It has more than 500 species of bamboo plants in 22 genera. The bamboo forest area is 5.2 million hm2, accounting for nearly 1 / 4 of the world's total bamboo forest area. , is the country with the most abundant bamboo resources, known as the "Kingdom of Bamboo". At present, the natural bamboo forest area in the country is about more than 5 million hectares, and more than 4.5 million tons of various bamboo materials can be felled every year, providing a large amount of raw materials for my country's industrial and agricultural production. The bamboo industry in the traditional sense is characterized by low technological content and low added value. The traditional soda and kraft pulping must be equipped wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/06D21C5/00D21D1/20
Inventor 腾铁生张跃平
Owner XINJIANG GUOLIYUAN INVESTMENT
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