An energy-saving and enhanced refining method for producing sticky pulp by composite pretreatment

A pretreatment and refining technology, applied in pulp beating/refining method, fiber raw material processing, paper, etc., can solve the problems of long processing time, high-speed continuous production, low biological enzyme treatment efficiency, and reduced physical strength of paper. , to overcome the long processing time, improve the physical properties of fiber into paper, and improve the physical properties of paper.

Active Publication Date: 2016-06-01
五洲特种纸业(龙游)有限公司
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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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  • An energy-saving and enhanced refining method for producing sticky pulp by composite pretreatment
  • An energy-saving and enhanced refining method for producing sticky pulp by composite pretreatment
  • An energy-saving and enhanced refining method for producing sticky pulp by composite pretreatment

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Effect test

Embodiment 1

[0024] Dissolve the pulp fiber in water, place it in an ultrasonic oscillator, and stir it: long fiber KP bleached pulp concentration is 4.2%, pH=7.7, temperature 23°C, ultrasonic power 250W, ultrasonic frequency 40kHz, processing time 5min will be processed After adding 30 IU / g of cellulose complex enzyme to the slurry, the temperature is 40°C, pH=6.5, the slurry concentration is 4.2%, and treated for 30 minutes; PFI refining to 71°SR. The energy consumption of pulp is saved by 32%, and the tensile index is increased by 15%.

Embodiment 2

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

Embodiment 3

[0028] Dissolve pulp fiber in water, add surfactant pretreatment: long fiber KP bleached pulp concentration is 6%, pH=7.2, temperature 25°C, surfactant dosage 0.15%, stirring treatment for 15min; surfactant is carboxymethyl Base cellulose: cationic starch: sodium dodecylbenzenesulfonate = 1:1:0.2; add cellulose compound enzyme 30IU / g to the treated pulp, temperature 40°C, pH=6.5, pulp concentration 4.3%, treat 30min; PFI refining to 68°SR. The energy consumption of pulp is saved by 17%, and the 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 pulping and papermaking engineering, and relates to an energy-saving and enhanced refining method for compound pretreatment to produce viscous pulp. It is an energy-saving refining technology of pretreatment + biological enzyme treatment, through one or A variety of pretreatment methods can improve the efficiency of subsequent biological enzyme treatment and reduce the time of biological enzyme treatment. It has the dual advantages of saving energy consumption for refining and improving the physical properties of pulp and paper. It is especially suitable for refining sticky pulp. Background technique [0002] At present, the paper industry is facing a transition from "high consumption, high energy consumption, and high pollution" to "low energy consumption, low water consumption, and low pollution". Compared with general non-biological catalysts, enzymes have the characteristic...

Claims

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Application Information

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Patent Type & Authority Patents(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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