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Method for preparing straw pulp with high yield by oxidation kneading and equipment used therefor

A high-yield, straw technology, applied in the direction of pretreatment with oxygen-generating compounds, finely split raw material pretreatment, digesters, etc., can solve the problems of low pulp yield, environmental pollution, difficult water treatment, etc. Scientific and reasonable, guarantee the effect of strength

Inactive Publication Date: 2008-04-16
朱晓平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is that a large amount of hemicellulose is lost in the process, a large amount of water, electricity, heat and other energy sources are consumed, and the pulp yield is low.
In addition, due to the high content of silicon and lignin in the wastewater, the evaporation tube in the alkali recovery system is easy to block, so the water treatment is difficult, causing environmental pollution

Method used

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  • Method for preparing straw pulp with high yield by oxidation kneading and equipment used therefor
  • Method for preparing straw pulp with high yield by oxidation kneading and equipment used therefor
  • Method for preparing straw pulp with high yield by oxidation kneading and equipment used therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] As shown in Fig. 1, firstly, the straw is cut off and dust-removed, and then input into the feed port 2 of the oxygen soaker 1 . The various components of agricultural straw are composed of cellulose, hemicellulose, lignin and miscellaneous cells. Its characteristics are due to the short growth period of straw, loose mesh structure, poor compactness, and lignin is easily oxidized. Then prepare the auxiliaries. The auxiliary agent is formed by mixing the following components according to weight percentage: 4% sodium hydroxide, 5% hydrogen peroxide, 2% sodium silicate, 0.01% magnesium sulfate, and 0.3% grafted starch. Then dilute the prepared auxiliary agent with water, heat it to 70°C, spray it into the material, stir the auxiliary agent and the material evenly, and input it into the oxygen soaker 1. A large number of conveyor belts 3 arranged horizontally are arranged in the oxygen soaker 1 , and the conveyor belts 3 are driven by power rollers 4 to move circularly. ...

Embodiment 2

[0021] A method for processing high-yield straw pulp by an oxidation kneading machine, which includes the following processing steps: first, cutting the straw and feeding it into an oxygen soaker 1 for oxygen soaking; second, preparing an oxygen soaking auxiliary agent, which contains 3% sodium hydroxide, 3% hydrogen peroxide, 3% sodium silicate, 0.005% magnesium sulfate and 0.1% grafted starch; thirdly, after diluting the prepared additives with water, dilute the prepared When the above-mentioned auxiliary agent is heated to 60°C, it is sprayed into the material, and then the above-mentioned auxiliary agent and the material are stirred evenly and then input into the oxygen soaker 1 for reaction; fourthly, the material after oxygen soaking is input into the rubbing machine 8 for longitudinal separation into filaments ; The fifth, after kneading, the material is input into the oxygen decomposer 10 for oxygen decomposition.

[0022] The reaction temperature in the oxygen soaker ...

Embodiment 3

[0026] A method for processing high-yield straw pulp by an oxidation kneading machine, which includes the following processing steps: first, cutting the straw and feeding it into an oxygen soaker 1 for oxygen soaking; second, preparing an oxygen soaking auxiliary agent, which contains 5% sodium hydroxide, 6% hydrogen peroxide, 5% sodium silicate, 0.015% magnesium sulfate and 0.5% grafted starch; thirdly, after diluting the prepared auxiliary agent with water, dilute the prepared When the additives are heated to 80°C, they are sprayed into the materials, and then the additives and the materials are stirred evenly and then input into the oxygen immersion device 1 for reaction; fourth, the materials after oxygen immersion are input into the kneading machine 8 for longitudinal separation into filaments ; The fifth, after kneading, the material is input into the oxygen decomposer 10 for oxygen decomposition.

[0027] The reaction temperature in the oxygen soaker 1 is 80° C., and th...

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Abstract

The invention discloses a method of oxidation rubbing high yield making straw pulp and equipment thereof, comprising the following process steps: firstly, straw is input into a feeding port (2) after being cut off and dust removed; secondly, promoter is prepared; thirdly, after the prepared promoter is diluted by water, material is injected when heated to 60-80 degree centigrade, then 2-4 percent of the total weight of the promoter and the material are stirred uniformly and input into an oxygen impregnating machine (1) for reacting; fourthly, the material after being oxygen impregnated is input into a rubbing machine (8) through a first feed screw (7) for vertically separating into wires; fifthly, the rubbed material is input into an oxygen dissolving machine (11) for oxygen dissolving. Processing equipment used by the method is orderly combined by the oxygen impregnating machine (1), the feed screw (7), the rubbing machine (8), a second feed screw (7), a hoist (10) and the oxygen dissolving machine (11). The invention can reserve most lignin, parenchyma cell and hemicellulose, has high pulp yield, and reduces environmental pollution.

Description

technical field [0001] The invention relates to a processing method of straw pulp and the equipment used therefor, in particular to a method and equipment for oxidizing and rubbing high-yield straw pulp under weakly alkaline conditions. Background technique [0002] At present, in the known pulping and papermaking industry using straw raw materials, a high-temperature and high-pressure cooking method is generally used to remove lignin and miscellaneous cells to obtain monocellulose, which is then processed into chemical pulp and semi-chemical pulp through filament separation, washing and rinsing. Its disadvantage is that a large amount of hemicellulose is lost in the process, a large amount of water, electricity, heat and other energy sources are consumed, and the pulp yield is low. In addition, due to the high content of silicon and lignin in the waste water, the evaporation pipe in the alkali recovery system is easy to block, so the water treatment is difficult and causes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C1/08D21C1/10D21C7/00
Inventor 朱晓平
Owner 朱晓平
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