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A method for comprehensive utilization of grass straw

A grass and straw technology is applied in the field of comprehensive utilization of grass and straw, which can solve the problems of limited amount of processing straw, occupation of too much manpower and material resources, and insignificant economic benefits.

Active Publication Date: 2011-12-28
SHANDONG FUYIN PAPER & ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the above-mentioned methods require too much manpower and material resources, the amount of straw to be processed is limited, and the economic benefits are not very significant.

Method used

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  • A method for comprehensive utilization of grass straw
  • A method for comprehensive utilization of grass straw
  • A method for comprehensive utilization of grass straw

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0158] (1) Ammonium cooking method

[0159] Add cooking agents to rice straw, wherein the amount of ammonium sulfite is 9% of the absolute dry raw material, and the liquid ratio is 1:2. Steam is added for heating. When the temperature is raised to 100°C, it is kept for 20 minutes. steam, continue to heat up to 165°C, and keep warm for 60 minutes to obtain a slurry with a concentration of 8%, and the hardness of the slurry is a potassium permanganate value of 16.

[0160] (2) Post-treatment of high hardness pulp to obtain dilute black liquor

[0161] Pulp enters from the entrance of the pulping machine, extrudes the black liquor, after extruding the black liquor, washes the pulp, merges the extruded black liquor and the black liquor of pulp washing to obtain a solid content of 15%, and a Baume degree of 9. Dilute black liquor, pH 10.

[0162] (3) Add auxiliary materials and dry in the black liquor

[0163]Add lignin and humic acid to dilute black liquor, evaporate and dry di...

Embodiment 2

[0170] (1) The wheat straw is cooked by the ammonium method and the anthraquinone-caustic soda method respectively

[0171] Soak the wheat straw with the impregnating solution so that the liquid ratio reaches 1:2, keep warm and mix in a spiral impregnator at 85°C for 10 minutes under normal pressure, and the impregnating solution is 4% sodium hydroxide solution.

[0172] Add cooking agents to a part of wheat straw, wherein the amount of ammonium sulfite is 13% of the absolute dry raw material, and the liquid ratio is 1:4; steam is passed into it for heating, and when the temperature is raised to 120°C, it is kept for 40 minutes, and small Release steam, continue to heat up to 173° C., and keep warm for 90 minutes; the obtained concentration is 15% slurry, and the hardness of the slurry is a potassium permanganate value of 28.

[0173] Add cooking agent in another part of wheat straw, wherein the amount of alkali used is 9% of the absolute dry raw material amount in terms of so...

Embodiment 3

[0179] (1) The wheat straw is cooked by the ammonium method and the anthraquinone-caustic soda method respectively

[0180] Soak the wheat straw with the impregnating solution, so that the liquid ratio reaches 1:4, keep warm and mix in a spiral impregnator at 95°C for 40 minutes under normal pressure, and the impregnating solution is 4% sodium hydroxide solution and Baume A mixture of black liquor with a degree of 11.

[0181] Add cooking chemicals to a part of wheat straw, wherein the amount of ammonium sulfite is 10% of the absolute dry raw material, and the liquid ratio is 1:3; steam is passed into it for heating, and when the temperature is raised to 110°C, it is kept for 30 minutes, and then small Let off steam, continue to heat up to 170°C, and keep warm for 80 minutes; obtain a slurry with a concentration of 9%, and the hardness of the slurry is a potassium permanganate value of 18

[0182] Add cooking agent in another part of wheat straw, wherein the amount of alkali ...

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Abstract

The invention relates to a method for comprehensive utilization of grass straw. Firstly, the cellulose in the straw is used for pulping as a raw material for paper pulp. During the pulping process, lignin is dissolved in the cooking liquid and becomes the solid content of the black liquor. The main component, because the lignin is fully refined after cooking, it is easy to degrade, and the crops are easy to absorb, and it becomes a good organic fertilizer. At the same time, a considerable amount of fulvic acid can be formed under high temperature and high pressure during the pulping process, so black The liquid can be made into high-quality fulvic acid fertilizer. Through the above steps, the purpose of comprehensive utilization of grass straw can be achieved, and the pulp and fulvic acid fertilizer are expensive, and good economic benefits can be obtained.

Description

[0001] This application is a divisional case of an application with the application number 200710300209.X, the application date is December 5, 2007, and the invention name is "a pulp and black liquor prepared from grass raw materials, its preparation method and its application" Apply. technical field [0002] The invention relates to a comprehensive utilization method of grass straw, which belongs to the field of papermaking and fertilizer. Background technique [0003] China is a large planting country of wheat, rice and other grass crops. Every harvest season, a large amount of straw is produced. The treatment and disposal of straw has become the main concern of people in daily life. People have to burn a lot of stalks or put the stalks into the river to reduce the pressure of a lot of stalks. [0004] The harm caused by straw burning and straw entering the river is enormous. It directly affects our living environment and endangers our health. With the burning of straw,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C3/00D21H11/12D21C11/00D21C3/14D21C3/02D21H17/05D21H17/64D21H17/66D21C7/00C05F7/02
Inventor 李洪法宋明信杨吉慧郭良进
Owner SHANDONG FUYIN PAPER & ENVIRONMENTAL PROTECTION TECH
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