Selecting technology during preparing grass material

A process and raw material technology, applied in the direction of raw material separation, sieving, solid separation, etc., can solve the problems of pulp macular and pulp prone to macular, and achieve the effect of less dust spots and improved paper quality

Active Publication Date: 2008-01-09
SHANDONG FUYIN PAPER & ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, it is impossible to remove the packaging tape in the grass slices obtained after preparing the materials. Due to the existence of grass knots, the grass slices obtained by the preparation method of the prior art are then cooked and pulped to obtain Pulp is prone to macula, and for the existing technology, after cooking, it is necessary to remove impurities such as grass knots through screening or other measures, so that the macular phenomenon of the prepared pulp

Method used

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  • Selecting technology during preparing grass material
  • Selecting technology during preparing grass material
  • Selecting technology during preparing grass material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]Referring to Fig. 1, get 5 tons of straws with a moisture content of 10%-22% and a length of 300-350mm, slice them, cut them into grass slices with a length of 20-80mm and knead their knots, slice and The grass flakes obtained after kneading are transported into the cyclone separator for dust removal, and the dust, grass clippings, and ears with low density in the grass flakes are extracted from the separator, and the grass flakes are not drawn out due to their large weight, and then conveyed Screening in the cylinder sieve, the impurity content in the grass slices entering the cylinder sieve is 18%, the cylinder sieve is placed inclined relative to the horizontal ground, and the inclination between the horizontal plane is 6°, the sieve of the inner screen basket on the cylinder sieve The hole is a square screen hole, the side length is 30×30mm, and the rotation speed is 10 rpm. The screen hole of the outer screen basket on the cylindrical screen is a round hole, and the ...

Embodiment 2

[0040] Referring to Figure 1, take 5 tons of wheat straw with a moisture content of less than 10%, slice it and knead it, cut it into small sections with a length of 20--50 mm, and require that the wheat straw can be kneaded, and the wheat straw slices obtained after slicing are transported into the Dust removal is carried out in the cyclone separator. The dust, grass clippings and ears with low density in the grass slices are extracted from the separator. The wheat straw slices will not be drawn out due to their large weight, and then they are transported to the cylinder screen for screening. The impurity content in the wheat straw flakes entering the cylinder sieve is 20%. The cylinder sieve is placed obliquely relative to the horizontal ground, with an inclination of 8° between the horizontal plane. The sieve holes of the inner sieve basket on the cylinder sieve of the cylinder sieve are square The sieve hole is 30×30mm, and the sieve hole of the outer screen basket of the c...

Embodiment 3

[0042] Take cotton stalks with a moisture content below 18% and slice them into small sections with a length of 20 mm. The cotton stalks obtained after slicing are transported into a cyclone separator for dust removal. The dust, grass clippings, The ear is drawn out from the separator, the cotton stalk will not be drawn out because of its large weight, and then it is transported to the cylinder screen for screening. The impurity content in the cotton stalk entering the cylinder screen is 22%, and the cylinder screen is relatively It is placed on a horizontal ground with an inclination of 10° to the horizontal plane. The dust-removed grass slices first enter the inner screen basket 2 of the cylindrical screen. The speed of the inner screen basket is 12 rpm, and the speed of the outer screen basket is maintained at 20. rpm, when the cylinder sieve rotates around the shaft, the grass flakes pass through the inner screen basket of the cylinder sieve and enter the outer screen baske...

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Abstract

The present invention provides grass material sieving process, which includes the following steps: 1. cutting grass material excluding reed into 20-80 mm long chopped pieces and dedusting; 2. sieving; and 3. storing the sieved grass material in material storing storehouse. The grass material sieving process can eliminate most of grass knots likely to form yellow spot in the made paper, and this can reduce the alkali consumption in the papermaking process.

Description

technical field [0001] The invention relates to a screening process in the preparation process of grass raw materials. Background technique [0002] The existing grass raw material preparation process generally includes three main processes of slicing, screening and dust removal. Some factories try their best to remove the roots, ears, leaves, moldy and rotten parts of the grass as much as possible before slicing. The purpose of slicing is to cut the grass raw material. The processed grass raw material can be continuously fed into the grass cutter and cut into grass slices, and then the grass slices and their impurities are sent to the screening machine by the belt conveyor for screening. Some screenings are generally carried out in cylinder sieves and / or flat screens. On cylinders and / or flat screens, grains and grass knots pass through 12mm sieve holes and fall to the bottom. Dust, grass clippings, etc. are relatively light. The material then escapes from the top of the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B07B1/18B07B1/46D21B1/06
Inventor 宋明信李洪法陈松涛宋建军江春甫杨吉慧
Owner SHANDONG FUYIN PAPER & ENVIRONMENTAL PROTECTION TECH
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