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Environmental pulping system and pulping method for annual non-woody biomass fiber pulp

A non-woody, biomass technology, applied in pulp beating/refining method, non-woody plant/crop pulp, fiber raw material processing, etc. Deep and other problems, to achieve the effect of superior environmental performance

Inactive Publication Date: 2017-02-22
刚荣环保科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The current dominant technical method of pulping is the production process of pulping by alkaline cooking. Compared with wood fiber in terms of characteristics and tissue composition, crop and grass fibers have the characteristics of a large proportion of non-fiber components, including large ash content, High silicon content and many miscellaneous cells lead to deep color. These characteristics are the most unfavorable factors in the whole pulping process, especially in the alkaline pulping process. The high alkali method removes ash, lignin and other components, and at the same time it will A large amount of sewage that is difficult to transform and use is produced, and the environmental pollution pressure is very high, and the consumption of water and alkaline chemicals in the whole process is relatively large; the high-alkali cooking method must be equipped with washing, screening, dehydration, etc. Steps, the cooking and bleaching processes are generally carried out independently, the discharge of black liquor and intermediate wastewater is large, the content of suspended solids and organic matter in the discharged sewage is high, the color is deep, and it is obviously acidic or alkaline, which is difficult to biochemically transform, and the process is complicated and costly. High pressure, high environmental protection pressure, high fiber loss and low pulp yield
[0005] To sum up, when faced with annual non-woody crop straw or straw raw materials whose characteristics are far different from lignocellulosic raw materials, technicians still use leading technical means to remove non-fibrous components in raw materials in order to obtain qualified finished pulp products , but the technical road is full of difficulties and the technological development is difficult, resulting in the inability to use the resource-rich annual non-woody crop straw or straw raw materials in a reasonable, efficient and environmentally friendly way

Method used

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  • Environmental pulping system and pulping method for annual non-woody biomass fiber pulp
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  • Environmental pulping system and pulping method for annual non-woody biomass fiber pulp

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Effect test

Embodiment 1

[0041] Use straw as raw material to make density board fiber pulp, packaging paper mold container fiber pulp or corrugated base paper fiber pulp.

[0042] The straw is cut by the hay cutter and sprayed into the cyclone screening machine, and the non-raw materials such as waste slag and stones screened out are sent to the quantitative bin 5 by the screw conveyor 1, and the dryness is adjusted by adding water to make the dryness range within 30 -70%, the material is evenly and quantitatively sent to the extruding and fibrillating device part 8 by the dosing machine 6 and the feeding screw 7 connected in series, and the dense fiber of the material is The tissue structure is instantly cracked and softened under the action of high temperature and high pressure that is accompanied by physical machinery, and the biomass in it is rubbed into filamentous fiber bundles, and the fiber bundles are fully softened in the extruding and fibrillating device section 8 ; Thereafter, the feeding ...

Embodiment 2

[0044] Wheat straw is used as raw material to make paper mold tableware fiber pulp, packaging paper mold container fiber pulp, and high-grade uncolored paper fiber pulp.

[0045] The raw materials are cut by the hay cutter and sprayed into the cyclone screening machine, screened and purified. The materials are sent to the impurity-removing and washing machine 2 through the screw conveyor 1, and the material fibers are swelled by the action of multi-roller fins and water flow, and Remove large sandstones, metal sundries and other heavy foreign matter entrained in the material, and discharge them out of the machine at regular intervals from the slag collection tank at the bottom. After washing, the material flows to the flat vibrating screen 3 under the action of water flow, and the raw material is conveyed by high-frequency vibration To the dehydration feeding screw conveyor 4, the dehydrated material is discharged from the sieve hole, and after sedimentation and filtration, it ...

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Abstract

The application of the invention provides an environmental pulping system and pulping method for annual non-woody biomass fiber pulp. The pulping system, according to technology line, comprises a raw material processing device part, a squeezing and fibrillating device part, a multistage series connection plate grinding and fibrillating device part and a washing and dewatering device part; the pulping system is formed by the device parts and conveyers among the device parts for connecting materials; the pulping method implemented by the pulping system comprises following steps: raw material is subjected to raw material processing, squeezing and fibrillating, plate grinding, fibrillating, screening, purifying and cleaning to finally obtain pulp product. The technical scheme has the technical advantages of environmental protection, high quality, high pulp yield and low fiber loss; the pulp of the invention can replace unbleached kraft pulp in cardboard and paper production of density board and packaging products; the production cost is obviously reduced.

Description

technical field [0001] The application of the present invention relates to a fiber pulping method using plant fiber raw materials and a pulping system, in particular to a manufacturing method and a pulping system for preparing fiber pulp products using straw or stalks of annual plants as raw materials. Background technique [0002] my country is a big producer and consumer of density boards, cardboard in packaging products, and paper products. The raw materials used for these products have long been wood. Faced with the increasingly scarce timber resources, although we intend to study the pulping technology of annual non-woody crops such as straw and straw, which are extremely rich in resources, due to the characteristics of annual non-woody crops, the technical problems and the complexity of the problems, Many technicians are discouraged, and the disclosed related pulping technology has complex means, many process conditions and high requirements, low pulp quality, and more...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/30D21D1/30D21D5/02D21H11/12
CPCD21B1/30D21D1/303D21D5/02D21H11/12
Inventor 李军李杰
Owner 刚荣环保科技(上海)有限公司