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Broussonetia white bast biological pulping method

A technology of biological pulping and glazing, which is applied in pulping of cellulose raw materials, textiles and papermaking, papermaking, etc., can solve the problems of high pollution load, failure to achieve low hardness and fiber separation point, long processing cycle, etc., and achieve Effects of low waste water pollution load and shortened biological treatment time

Inactive Publication Date: 2008-04-09
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the defects existing in the prior art, the purpose of the present invention is to provide a kind of biological pulping technology for the bast fibers of the eucalyptus glabra, which overcomes the high chemical dosage and high temperature of the existing chemical pulping technology. The defects of high pressure and high pollution load can overcome the defects of long processing period brought about by the use of biotechnology in raw material processing, and the defects of low hardness and fiber separation point cannot be achieved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Use a slitting machine to cut the Guangyechu white skin into 30mm skin segments, and the pass rate is required to reach 85% or more;

[0016] (2) In the soaking tank, soak in hot water at 60°C for 30 minutes at a liquid ratio of 1:6.

[0017] (3) Use a fiber decomposing machine (special equipment for papermaking) to decompose the bark of Guangye into needle-like fiber bundles.

[0018] (4) The decomposed fiber bundles of the glabra bark are sent to the bioreactor, and cold water is added, the liquid ratio is controlled to be 1:20, and the temperature is 30°C. Anaerobic Bacillus was added at 3%.

[0019] (5) The materials in the bioreactor are slowly circulated under the action of a stirrer or a circulating pump to keep the concentration of the materials in the reactor uniform and keep the reaction temperature at 30°C.

[0020] (6) After 24 hours of inoculation, add nutrients. Make urea and dipotassium hydrogen phosphate into 10% solution respectively, then add urea acco...

Embodiment 2

[0024] (1) Use a slitting machine to cut the Guangyechu white skin into 30mm skin segments, and the pass rate is required to reach 85% or more;

[0025] (2) In the soaking tank, soak in hot water at 60°C for 40 minutes at a liquid ratio of 1:7.

[0026] (3) Use a fiber decomposing machine (special equipment for papermaking) to decompose the bark of Guangye into needle-like fiber bundles.

[0027] (4) The decomposed fiber bundles of the gladiolus bark are sent to the bioreactor, and cold water is added, the liquid ratio is controlled to be 1:16, and the temperature is 28°C. Anaerobic Bacillus was added at 3%.

[0028] (5) The materials in the bioreactor are slowly circulated under the action of a stirrer or a circulating pump to keep the concentration of the materials in the reactor uniform and the reaction temperature to be 28°C.

[0029] (6) After 24 hours of inoculation, add nutrients. Mix urea and dipotassium hydrogen phosphate to a concentration of 10%, the addition amount is:...

Embodiment 3

[0033] (1) Use a slitting machine to cut the Guangyechu white skin into 30mm skin segments, and the pass rate is required to reach 85% or more;

[0034] (2) In the soaking tank, soak in hot water at 60°C for 30 minutes at a liquid ratio of 1:8.

[0035] (3) Use a fiber decomposing machine (special equipment for papermaking) to decompose the bark of Guangye into needle-like fiber bundles.

[0036] (4) The deconstructed Guangye mulberry fiber bundle is sent to the bioreactor, and cold water is added to control the liquid ratio at 1:25 and the temperature at 32°C. Anaerobic Bacillus was added at 3%.

[0037] (5) The materials in the bioreactor are slowly circulated under the action of a stirrer or a circulating pump to keep the concentration of the materials in the reactor uniform and keep the reaction temperature at 32°C.

[0038] (6) After 24 hours of inoculation, add nutrients. Mix urea and dipotassium hydrogen phosphate to a concentration of 10%, the addition amount is: urea 1.5%...

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Abstract

A glabrous leaf paper mulberry white skin pulping method is to immerse glabrous leaf paper mulberry white skin segments (30-50mm) into water for 30 to 60 minutes under the condition of a liquid ratio of 1:6 to 8 and temperature of 60 DEG C. Untwining the glabrous leaf paper mulberry white skin segments into a fiber bundle, then adding cold water according to a liquid ratio of 1:15 to 25 and leading the temperature to descend to 28 to 30 DEG C. Then a fiber bundle is sent to a reaction bin, accessed to anaerobic bacillus (inoculation amount is 3 percent) and reacted for 42 to 48 hours under the temperature of 28 to 32 DEG C. The biodegradation reaction is stopped when reaching a fiber liberation point, after treatment, the subsequent bleaching operation is carried on. Adding nutrient salt into the reaction materials 24 hours later after inoculation (urea 1.5 percent, K2HPO4H2O 1 percent). The invention overcomes defects of large consumption of chemicals, high temperature and high pressure and high pollution load existing in pulping technology by chemical method in the prior art; also, the invention overcomes defects that in the prior art long treatment cycle is needed caused by using biotechnology on raw material treatment, and low hardness and fiber liberation point can not be realized.

Description

Technical field [0001] The invention belongs to a process for preparing low-hardness slurry from bast fibers in the field of pulping and papermaking; at the same time, it also relates to a pulp technology that uses microbial fermentation treatment to reach a fiber separation point. Background technique [0002] Bast fiber raw materials such as light leaf bark, paper mulberry bark, goose bark, three yule bark, are the best raw materials for pulping and paper making, and are the main raw materials for manufacturing special paper such as cigarette paper, tea filter bag paper, and rice paper. The traditional pulping methods of bast fiber are chemical methods, using caustic soda method, sulphate method or other modified chemical methods to make pulp. The common feature is the use of a large amount of chemical agents, which requires cooking under high temperature and high pressure conditions to reach the separation point of the fibers and make the slurry reach a lower hardness. The che...

Claims

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Application Information

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IPC IPC(8): D21C3/22C12S3/02
Inventor 刘秉钺何连芳
Owner DALIAN POLYTECHNIC UNIVERSITY
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