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A combined pulping method

A technology for pulping and biological pulping, which is applied in pulp beating/refining methods, pulping with inorganic alkalis, pulping with cellulose raw materials, etc. Good pulp performance and less environmental pollution

Inactive Publication Date: 2011-12-07
CHINA NAT PULP & PAPER RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since bioengineering itself is still in the early stages of development, the technology itself is immature. Although biotechnology has been put into production and application in some fields, the current application cost of biotechnology in various fields is too high. Biotechnology is beyond reach

Method used

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Embodiment 1

[0026] The raw material of this embodiment is the bark tree bark. The raw materials are cut into 2-4cm knots, squeezed and torn, and soaked in the biological fluid of 10% white rot fungi, 4% brown rot fungi, and 6% soft rot fungi. The soaking conditions are temperature 40°C, concentration 15%, Time 68 hours. The raw materials after biological immersion are directly concentrated and soaked in chemical liquid. The composition of chemical liquid is 80% of magnesium hydroxide, 5% of sodium hydroxide, 5% of potassium hydroxide, 10% of hydrogen peroxide, and the dosage of chemical liquid is 6%. , the treatment conditions are temperature 110°C, concentration 15%, time 30min. Finally, it is treated with a disc refiner. The refining temperature is 60°C, the concentration is 30%, and the pulp yield is 55%. After the pulp is washed, the paper is made. The paper whiteness is 50% ISO, the paper breaking length is 3.5km, and the tear index is 3mN. m 2 / g.

Embodiment 2

[0028] The raw material of this embodiment is peeled poplar. The raw material is chipped, squeezed and torn, and the raw material is soaked in a biological solution of 6% white rot fungi, 5% brown rot fungi, and 8% soft rot fungi. The soaking conditions are temperature 40°C, concentration 12%, and time 72 hours. The raw materials after biological soaking are directly concentrated and then soaked in chemical liquid. The composition of chemical liquid is 65% magnesium hydroxide, 10% sodium hydroxide, 7% potassium hydroxide, 18% hydrogen peroxide, and the dosage of chemical liquid is 8%. , the treatment conditions are temperature 120°C, concentration 25%, time 30min. Finally, it is treated with a disc refiner, the refining temperature is 35°C, the refining concentration is 35%, and the pulp yield is 68%. After the pulp is washed, the paper is made, the paper whiteness is 46% ISO, the fracture length is 4.4km, and the tear index 3.5mN·m 2 / g.

Embodiment 3

[0030] The raw material of this embodiment is peeled eucalyptus. The raw material is chipped, squeezed and torn, and soaked in a biological solution of 10% white rot fungi, 5% brown rot fungi, and 8% soft rot fungi. The soaking conditions are temperature 38°C, concentration 12%, and time 96 hours. The raw materials after biological immersion are directly concentrated and then soaked in chemical liquid. The composition of chemical liquid is 50% magnesium hydroxide, 20% sodium hydroxide, 10% potassium hydroxide, 20% hydrogen peroxide, and 10% chemical liquid. , the treatment conditions are temperature 120°C, concentration 20%, time 30min. Finally, use a disc refiner to refine the pulp, the refining temperature is 85°C, the refining concentration is 30%, and the pulp yield is 65%. After the pulp is washed, the paper is made, the paper whiteness is 40% ISO, the paper fracture length is 4.2km, and the tear index 4.0mN·m 2 / g.

[0031] From above Example 1, Example 2 and Example ...

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Abstract

A combined pulping method, using bamboo wood as raw material. The present invention relates to a combined pulping method, in particular to a biological, chemical and mechanical combined pulping method, which belongs to the technical field of pulping and papermaking, especially biochemical and mechanical Combined pulping technology. The present invention combines the current advanced biotechnology, mature chemical pulping technology and high-efficiency mechanical pulping technology through organic integration, comprehensively utilizes the advantages of the above technologies, conducts targeted combination, and develops a new pulping method. The method of the invention reduces the pollution of the pulping industry and improves the economic benefits of the pulping industry. The combined pulping method has strong raw material adaptability, good pulping performance, and good pulp is suitable for compounding various papers.

Description

technical field [0001] The invention relates to a combined pulping method, in particular to a biological, chemical and mechanical combined pulping method, which belongs to the technical field of pulping and papermaking, in particular to the biochemical and mechanical combined pulping technology. Background technique [0002] The pollution of the pulp and paper industry has become one of the main pollution areas in our country. The traditional chemical pulping technology produces pulp cooking black liquor, which has a foul smell and has a serious impact on the surrounding air. Moreover, the black liquor itself is difficult to handle and the processing cost is high. If it is directly discharged, it will seriously pollute the environment. At present, the best treatment method for pulping black liquor is combustion treatment, but this treatment method requires huge investment and high energy consumption. In the traditional pulping and papermaking process, it usually takes dozen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C3/02D21C3/22D21D1/00
Inventor 陈彬薛崇昀田超聂怡张凯穆军贺文明吕卫军
Owner CHINA NAT PULP & PAPER RES INST CO LTD
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