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Method for comprehensive utilization of grass type stalk

A technology of grasses and straws, which is applied in the field of comprehensive utilization of grasses and straws, can solve the problems of not very significant economic benefits, excessive manpower and material resources, and limited amount of straws to be processed.

Active Publication Date: 2009-06-10
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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  • Method for comprehensive utilization of grass type stalk
  • Method for comprehensive utilization of grass type stalk
  • Method for comprehensive utilization of grass type stalk

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0158] (1) Immonium cooking

[0159] Add the cooking agent to the straw, in which the amount of ammonium sulfite is 9% of the dry raw material, the liquid ratio is 1:2, and the steam is introduced for heating. steam, continue to heat up to 165 DEG C, and keep the temperature for 60 minutes to obtain slurry with a concentration of 8%, and the hardness of the slurry is potassium permanganate value of 16.

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

[0161] The pulp enters from the inlet of the pulp press, extrudes the black liquor, and after the black liquor is extruded, the pulp is washed, and the extruded black liquor and the washed black liquor are combined to obtain a solid content of 15% and a Baume degree of 9. Dilute black liquor, pH 10.

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

[0163]Add lignin and humic acid to the dilute black liquor, and directly evaporate and dry to obtain fulvic acid fertilizer.

[0164] ...

Embodiment 2

[0170] (1) Cooking wheat straw by ammonium method and anthraquinone-caustic soda method respectively

[0171] The dipping solution is dipping the wheat straw to make the ratio of liquid reach 1:2. The dipping solution is kept at 85° C. under normal pressure and mixed for 10 minutes in a spiral dipping device. The dipping solution is sodium hydroxide solution with an absolute dry raw material content of 4%.

[0172] A cooking agent was added to a part of the wheat straw, in which the amount of ammonium sulfite was 13% of the dry raw material, and the liquid ratio was 1:4; steam was introduced for heating, and when the temperature was raised to 120 °C, the temperature was kept for 40 minutes, and the small Release steam, continue to heat up to 173° C., and keep the temperature for 90 minutes; a slurry with a concentration of 15% is obtained, and the hardness of the slurry is potassium permanganate value of 28.

[0173] Add cooking chemicals to another part of the wheat straw, wh...

Embodiment 3

[0179] (1) Cooking wheat straw by ammonium method and anthraquinone-caustic soda method respectively

[0180] Impregnating the wheat straw straw with the impregnating liquid to make the liquid ratio reach 1:4, heat preservation and mixing in a spiral impregnator at 95°C under normal pressure for 40 minutes, the impregnating liquid is sodium hydroxide solution with a dry raw material content of 4% and Baume A mixture of black liquor with a degree of 11.

[0181] A cooking agent was added to a part of the wheat straw, in which the amount of ammonium sulfite was 10% of the dry raw material, and the liquid ratio was 1:3; steam was introduced for heating, and the temperature was heated to 110 ° C for 30 minutes, and the small Release the steam, continue to heat up to 170 ° C, and keep the temperature for 80 minutes; obtain a slurry with a concentration of 9%, and the hardness of the slurry is potassium permanganate value of 18

[0182] Add cooking chemicals to another part of the ...

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Abstract

The invention relates to a comprehensive utilization method for grass straws. Firstly, cellulose in the straws is utilized to pulp to serve as a raw material of paper pulp; during the pulping, lignin is dissolved in a stewing liquor to become a main constituent of a solid in a black liquor; the lignin is fully refined through the stewing and has easy degradation, and crops are easy to absorb, so the black liquor becomes a good organic fertilizer; at the same time, a fulvic acid with considerable quantity can be formed under conditions of high temperature and high pressure during the pulping, so the black liquor can be prepared into a high-quality fulvic acid fertilizer; the aim of comprehensive utilization of the grass straws is achieved through the steps, and the good economic benefit can be obtained thanks to the fact that the paper pulp and the fulvic acid fertilizer are expensive.

Description

[0001] This application is a division of an application whose application number is 200710300209.X, the application date is December 5, 2007, and the invention-creation title is "a kind of pulp and black liquor prepared from grass raw materials, its preparation method and its application" Application. technical field [0002] The invention relates to a comprehensive utilization method of grass straw, belonging to the fields of papermaking and fertilizers. Background technique [0003] China is a big country in the cultivation of grass crops such as wheat and rice. Every harvest season, a large amount of straw is produced. The treatment and disposal of straw has also become a major concern in people's daily life. People have to burn a lot of straw, or put straw into the river to reduce a lot of straw pile pressure. [0004] The harm caused by straw burning and straw entering the river is huge. It directly affects our living environment and endangers our health. With the bu...

Claims

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Application Information

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Patent Type & Authority Applications(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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