Energy-saving enhanced defibrination method for composite pretreatment and production of viscous paper pulp

A pretreatment and pulping technology, applied in pulp beating/refining method, fiber raw material treatment, paper, etc., can solve the problems of long processing time, high-speed continuous production, reduction of physical strength of paper, and low efficiency of biological enzyme treatment, etc. Achieve the effects of overcoming long processing time, improving the physical properties of paper, and improving the physical properties of fiber paper

Active Publication Date: 2015-03-25
五洲特种纸业(龙游)有限公司
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  • Abstract
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Problems solved by technology

However, there are also some problems, such as the low efficiency of biological enzyme treatment, long treatment time is not suitable for the high-speed continuous production of papermaking; the physical and chemical environment of biological enzyme action is narrow, and the production fluctuation is large; biological enzyme can degrade pulp fiber Cellulose and hemicellulose, reduce the physical strength of paper, etc.

Method used

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  • Energy-saving enhanced defibrination method for composite pretreatment and production of viscous paper pulp
  • Energy-saving enhanced defibrination method for composite pretreatment and production of viscous paper pulp
  • Energy-saving enhanced defibrination method for composite pretreatment and production of viscous paper pulp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Dissolve the pulp fibers in water, place them in an ultrasonic oscillator, and stir to process: the long-fiber KP bleached pulp concentration is 4.2%, pH=7.7, temperature 23°C, ultrasonic power 250W, ultrasonic frequency 40kHz, and treatment time is 5min. After adding cellulose composite enzyme 30IU / g, temperature 40°C, pH=6.5, pulp concentration 4.2%, treatment for 30min; PFI refining to 71°SR. Pulp energy consumption is saved by 32% and tensile index is increased by 15%.

Embodiment 2

[0026] Dissolve pulp fiber in water, add sodium hydroxide aqueous solution for pretreatment: long fiber KP bleached pulp concentration is 6%, sodium hydroxide dosage is 0.5%, temperature is 35°C, and treatment time is 10min; add cellulose to the treated pulp Compound enzyme 30IU / g, temperature 40°C, pH=6.5, slurry concentration 4.3%, treatment for 30min; PFI refining to 70°SR. Pulp energy consumption is saved by 28% and tensile index is increased by 5%.

Embodiment 3

[0028] Dissolve pulp fibers in water, add surfactant for pretreatment: long fiber KP bleached pulp concentration is 6%, pH=7.2, temperature 25°C, surfactant dosage 0.15%, stirring for 15min; surfactant is carboxymethyl Base cellulose: cationic starch: sodium dodecyl benzene sulfonate = 1:1:0.2; add cellulose composite enzyme 30IU / g to the treated pulp, temperature 40°C, pH = 6.5, pulp concentration 4.3%, process 30min; PFI refining to 68°SR. Pulp energy consumption is saved by 17% and tensile index is increased by 16%.

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Abstract

The invention discloses an energy-saving enhanced defibrination method for composite pretreatment and production of viscous paper pulp. The method comprises the following steps that (1) paper pulp fibers are dissolved in water, even defibering is carried out, and then pretreatment is carried out; (2) biological enzymes are added to the treated paper pulp for treatment, the dosage of the biological enzymes ranges from 10 IU/g to 60 IU/g, the temperature ranges from 40 degrees to 60 degrees, the pH value ranges from 6 to 9, the concentration of the paper pulp ranges from 3 wt% to 8 wt%, and treatment is carried out for 10 min to 30 min; (3) continuous millstone milling and beating are carried out on the pulp of the step (2), and the pulp is stored for standby application. The method remarkably improves the efficiency of subsequent biological enzyme treatment, and overcomes the defects that enzyme treatment time is too long in biological enzyme assistant defibrination production and energy conservation in defibrination and the physical strength of finished paper formed by fibers cannot be achieved at the same time, the defibrination energy consumption and the defibrination time for producing the viscous paper pulp are saved, the defibrination energy consumption of chemical bleached needle wood pulp and chemithermomechanical pulp of needle wood is reduced by 15%-45%, and the physical properties of finished paper formed by pulp fibers can be improved.

Description

technical field [0001] The invention belongs to the field of energy-saving and clean production of pulp and paper engineering, and relates to an energy-saving and enhanced refining method for producing sticky pulp by compound pretreatment, which is an energy-saving refining technology of pretreatment + biological enzyme treatment. A variety of pretreatment methods can improve the efficiency of subsequent biological enzyme treatment and reduce the biological enzyme treatment time, which has the dual advantages of saving energy consumption for refining and improving the physical properties of pulp into paper, especially suitable for the refining of viscous pulp. Background technique [0002] At present, the paper industry is facing the transition from "high consumption, high energy consumption, high pollution" to "low energy consumption, low water consumption, low pollution". Compared with general non-biological catalysts, enzymes have the characteristics of mildness, specific...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21D1/30D21H17/00D21H17/64D21H17/26
CPCD21D1/30D21H17/005D21H17/26D21H17/64
Inventor 张学金沙力争胡志军
Owner 五洲特种纸业(龙游)有限公司
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