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Pulping system and pulping method for environment-friendly mechanical pulp and chemical mechanical pulp of non-woody crops

A technology of chemical machinery and crops, applied in pulping of cellulose raw materials, textile and papermaking, separation of raw materials, etc., can solve the problems of poor biodegradability, large discharge of intermediate waste liquid, difficult conversion treatment, etc., and achieve remarkable results

Active Publication Date: 2011-11-02
刚荣环保科技(上海)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN101880977A discloses a chemical mechanical pulping production method using Pinus sylvestris sylvestris, white pine, and poplar as raw materials. However, the above method cannot achieve the technical purpose of high yield, physical strength meeting the index requirements, high bleaching degree, and clean pulping, and it is even more difficult to produce high bleaching degree and medium and high-grade finished pulp
The characteristics and tissue composition of crop and grass fibers are very different from those of wood fibers. The raw materials of crops and grass fibers have the characteristics of dark color, large ash content, high silicon content, and many non-fibrous components such as miscellaneous cells. These are used in pulping Processes, especially the alkaline pulping process, are unfavorable factors. The high-alkaline process method removes ash, lignin and other components, and produces a large amount of sewage that is difficult to convert and treat to pollute the environment. Water consumption and alkalinity in the process, etc. Drug consumption is higher
In addition, high-alkali cooking must be equipped with washing, screening, dehydration and pulping processes in the middle, and the cooking and bleaching processes need to be carried out independently, the discharge of black liquor and intermediate waste liquid is large, the loss of fibers is also large, and the yield of pulp is low. The concentration of suspended matter and organic matter in sewage is high, the color is deep, its acidity or alkalinity is high, and its biodegradability is poor, which brings great pollution pressure to the environment

Method used

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  • Pulping system and pulping method for environment-friendly mechanical pulp and chemical mechanical pulp of non-woody crops

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Using straw as raw material to make mechanical natural color paste

[0052] The raw materials are cut by the knife-roller grass cutter 1 and enter the hammer wire dust collector 2. The waste slag that is screened out is sent to the waste residue biomass gasification comprehensive reuse system by the collection and transportation equipment, and the raw materials are sent to the waste residue biomass gasification comprehensive reuse system through the transportation equipment 3. In the multi-roller sand and gravel metal collector of the immersion washer 4, the raw materials are pre-washed by the action of multi-roller paddles and water flow, and the washing water temperature is 75°C, and the large sandstone or metal sundries entrained in the raw materials are removed. The specific heavy foreign matter is removed, falling into the bottom slag collection tank and discharged out of the machine regularly, and the material flows into the hydraulic prepreg machine as the immersi...

Embodiment 2

[0056] Bleached pulp made from wheat straw or straw

[0057] The raw materials are cut by the knife-roller grass cutter 1, and then enter the hammer wire dust collector 2. The waste slag that is screened out is sent to the biomass gasification comprehensive reuse system by the collection and transportation equipment, and the raw materials are sent into the biomass gasification comprehensive reuse system through the transportation equipment 3. In the multi-roller sand and gravel metal collector as the dipping washer 4, the raw materials are pre-washed through the action of the multi-roller paddle and water flow, and the pre-soaking agent is added to the washing water. The pre-soaking agent contains JFC0.05%, Sodium dodecylbenzenesulfonate 0.05% and sodium hydroxide 0.3%, liquid ratio 1:20, washing water temperature 75°C, accelerate penetration, swell raw material fibers, and remove large sandstone or metal debris entrained in raw materials Equally large foreign matters are remo...

Embodiment 3

[0062] Making Bleached Pulp Using Bagasse as Raw Material

[0063]The raw material has become slag-like during the sugar making process, so the raw material is directly sent to the hammer wire dust collector 2 for pitting treatment through the belt conveyor, and the screened sugarcane pith and slag are sent to the waste slag production line by the collection and transportation equipment. Material gasification system, the raw material is sent to the multi-roller sand and gravel metal collector as the impregnated washer 4 through the conveying equipment 3, and the raw material is pre-washed by the action of the multi-roller paddle and water flow, and the pre-soaked water is added to the washing water The agent contains: JFC 0.05%, sodium dodecylbenzene sulfonate 0.05% and sodium hydroxide 0.5%, the liquid ratio is 1:20, the washing water temperature is 75°C, and the large sandstone or metal debris entrained in the raw materials The foreign matters of equal proportion are removed...

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Abstract

The invention provides a pulping system for environment-friendly mechanical pulp and mechanical chemical pulp of non-woody crops, which comprises a cutting machine, a hammer filament duster, an impregnating washer, an I-section cracking impregnator, an II-section cracking impregnator, an I-section storage reaction bin, an II-section storage reaction bin, a high-concentration impregnating millstone mill, an III-section storage reaction bin and a pulping machine and screening, purification and concentration equipment in a subsequent process, wherein a steaming spiral conveyer, the I-section storage reaction bin, the II-section storage reaction bin and the III-section storage reaction bin are provided with steam injecting pipelines, and liquid medicine injecting pipelines are also arranged at the impregnating washer, the cracking tail end of the I-section cracking impregnator, the cracking tail end of the II-section cracking impregnator and the input position of the high-concentration impregnating millstone mill. A pulping method comprises the following steps of: preparing raw materials, performing pre-steaming spiral conveying, connecting two physical filamentation treatment sections in series, performing high-concentration disc impregnating filamentation treatment, and performing high-concentration pulping, screening, purifying and dehydrating to obtain commercial pulp. The technical scheme has the technical advantages of high yield, no pollution, low energy consumption and the like.

Description

technical field [0001] The application of the present invention relates to the pulping system of mechanical pulp and chemical mechanical pulp and the pulping process method thereof. The pulping effect is more significant, and it can also be used in processing industries such as pulping and manufacturing tobacco sheets. Background technique [0002] my country is a big country in the production and consumption of paper and cardboard, but there is a serious shortage of wood resources, and the pulping technology of annual non-woody crops such as straw and rice straw, which are rich in resources, as fiber raw materials has serious environmental pollution and low pulp quality. Therefore, it has to rely on a large amount of imported foreign commodity pulp for a long time. With the strengthening of the global awareness of ecological environment protection, the import price of wood and its products is getting higher and higher. In addition, the dependence on imported pulp and its pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C3/00D21B1/34
Inventor 李刚荣李军
Owner 刚荣环保科技(上海)有限公司
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