Wheat-straw biological clean pulping technology by black liquor bacterizing treatment

A technology of wheat straw and process, which is applied in the direction of fiber raw material treatment, cellulose raw material pulping, textile and paper making, etc., can solve the problems of large pollution and high COD production, reduce processing and operating costs, and improve pulp quality and improve The effect of ring crush strength

Inactive Publication Date: 2007-03-21
山东贵和显星纸业有限公司
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a bio-clean pulping process of wheat straw treated by bacteria treatment of black liquor, which can completely solve the problems of high COD production and heavy pollution in wheat straw pulping, and meet the index requirements of A-grade corrugated base paper

Method used

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  • Wheat-straw biological clean pulping technology by black liquor bacterizing treatment

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Embodiment Construction

[0017] Firstly, the raw material of wheat straw (straw class) is cut short, and the length of the straw is 2-3cm, and then dust is removed by horns to remove heavy impurities and prevent subsequent equipment from being damaged. The short-cut wheat straw raw material enters the prepreg machine, and at the same time, adds biological liquid according to a certain liquid ratio, and puts it into steaming balls; material. Run dry for 15 minutes; once the boost pressure rises to 0.2MPa; the pressure inside the steam ball must be reduced to zero when the steam is released; the second boost time is 40 minutes, rising to 0.6MPa; after 120 minutes of heat preservation, pour the material. After cooking, the slurry is processed through a squeezer and a high-consistency mill, and then enters a fine grinding and screening system. The black liquor from the pulping machine enters the biochemical bacteria pool.

[0018] At the beginning of the process, the original biological strains of metha...

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Abstract

The present invention relates to a wheat straw cleaner biopulping process. Its main technique is characterized by that firstly, the wheat straw raw material is cooked by using original bacterial liquor as cooking liquor, then the cooked stock can be passed through a pulp-extruding machine to make pulp liquor separation and the obtained black liquor can be fed into a biological bacterial pool and mixed with the described original bacterial liquor so as to form a biological liquor which can be used as cooking liquor of wheat straw raw material and form closed circulation. Said invention also provides the concrete preparation method of original biological bacterial liquor by using methanogen, saccharomycetes and white rottera as original biological bacterial seed.

Description

technical field [0001] The invention belongs to the biological pulping technology utilizing wheat straw. Background technique [0002] As the country's requirements for environmental protection become more and more stringent, environmental protection has become a major policy of the country. Wood pulping is relatively less polluting, but my country does not have rich forest resources. Although my country has rich wheat straw resources, wheat straw pulping has a lot of pollution . Today, although many enterprises use alkali recovery, alkali pulping cannot fundamentally solve pollution. Biopulping is an effective way to solve the pollution problem of wheat straw pulping at the present stage, but now the biopulping of some enterprises cannot avoid the addition of alkali and other cooking chemicals. The processing method without adding chemical products cannot meet the requirements of A-grade corrugated base paper due to poor pulp quality. The black liquor and mid-stage wastew...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C3/22C12S3/08
Inventor 徐书栋
Owner 山东贵和显星纸业有限公司
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