CN105505902A - Compound enzyme for grinding bleaching pulp and application process of compound enzyme - Google Patents
Compound enzyme for grinding bleaching pulp and application process of compound enzyme Download PDFInfo
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- CN105505902A CN105505902A CN201410516899.2A CN201410516899A CN105505902A CN 105505902 A CN105505902 A CN 105505902A CN 201410516899 A CN201410516899 A CN 201410516899A CN 105505902 A CN105505902 A CN 105505902A
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Abstract
The invention relates to a compound enzyme for grinding bleaching pulp and an application process of the compound enzyme. The compound enzyme is composed of 300-700 U/g of 400-1500 U/g of cellulase, 300-500 U/g of xylanase and 50-100 U/g of alkaline pectinase and lipase. The compound enzyme is an enzyme special for grinding the bleaching pulp, is convenient to use and needless of adjusting pH value of the bleaching pulp in a pulp pool, and can be directly applied to existing pulp grinding processes. By the novel process applying the compound enzyme to grind the bleaching pulp, pulp grinding effect is good, so that energy consumption in the process of pulp grinding can be lowered greatly. Compared with conventional pulp grinding processes, the novel process has the advantages that by applying the novel process, when pulp is ground to a same pulp beating degree, tensile strength of the bleaching pulp after pulp grinding can be improved by 16%, bursting strength is improved by 14%, white water concentration is lowered by 10%, and pulp grinding current is decreased by higher than 14%.
Description
Technical field
The present invention relates to pulp and paper technology field, be specifically related to a kind of bleached pulp defibrination prozyme and application art thereof.
Background technology
Defibrination is requisite workshop section in pulping and papermaking processes, can make the separated from one another of paper pulp fiber wire-dividing broom purification and fiber, increase interfibrous binding ability, improve into the requirement of paper physical strength and optical performance requirements etc. by defibrination effect.Meanwhile, defibrination need consume a large amount of electric energy, account for and produce 15 ~ 18% of total energy consumption from timber to paper, and the efficacy problems of defibrination is study hotspot for many years always.
In defibrination process, most Conversion of energy is heat, only has minority for the separation of fiber and wire-dividing broom purification, thus develops a kind of advanced refining process that the quality of starching can be kept to reduce again energy consumption, becomes the important goal of pulp and paper industry.
For the problem that energy consumption when bleached softwood wood and hardwood pulp defibrination is high, most of producer can only reduce power consumption by regulating mill parameters etc., and this method reduction energy consumption is limited.For seeking new technology to improve the amplitude reducing energy consumption, many research institutions are utilizing microorganism or biological enzyme to enable it while maintenance characteristics of pulp, reduce energy consumption.
The biological enzyme great majority that current domestic papermaking producer uses in defibrination section are inadequate to pulp-water system pH (partial neutral) adaptability, directly make effect not ideal enough, need the pH value and the temperature that first regulate pulp-water system, add operation and man-hour when therefore using.Therefore a kind of biological enzyme that can be applicable under neutral environment is developed significant to the method for the defibrination section energy consumption reducing reducing rules.
Summary of the invention
The object of this invention is to provide a kind of bleached pulp defibrination prozyme and application art thereof.This prozyme is suitable for existing needlebush or leaf wood bleached pulp refining process, does not need the pH value and the temperature that regulate stock tank entoplasm aqueous systems, improves refining effect, greatly reduce the energy consumption of defibrination section.
Bleached pulp defibrination prozyme of the present invention, described enzyme component is cellulase, zytase, alkaline pectase and lipase, and wherein unit of enzyme activity's content of each enzyme is respectively: cellulase 300 ~ 700U/g, zytase 400 ~ 1500U/g, alkaline pectase 300 ~ 500U/g and lipase 50 ~ 100U/g.
Above-mentioned prozyme of the present invention carries out the technique of defibrination to bleached pulp, comprise the steps:
(1) carry out size degradation under bleached pulp being joined hydrapulpter, starch dense 5 ~ 10%, add above-mentioned prozyme simultaneously, consumption 100 ~ 200g/ ton is starched, and adds auxiliary agent, and consumption 20 ~ 50g/ ton is starched; Whole system temperature is 30 ~ 60 DEG C, and beating time is 10 ~ 15min;
(2) slurry is by entering pulp storage tank after stock pump, pulp storage tank pH6.0 ~ 8.0, stops 40 ~ 60min, then grinds defibrination at the dense lower polydisc of 5 ~ 6% slurry, and after defibrination, beating degree is 45 ~ 52 ° of SR.
Above-mentioned auxiliary agent is made up of sodium alkyl benzene sulfonate, oleic acid, sodium abietate, alkylphenol polyoxyethylene, polyoxyethylene octylphenol ether, tween 80, and the mass ratio of each component is 7:4:5:10:22:15.
Above-mentioned bleached pulp is needlebush and/or leaf wood bleached pulp.
Prozyme of the present invention is bleached pulp defibrination specific enzyme, easy to use, does not need the pH value regulating stock tank Inner bleaching slurry, can directly apply to existing refining process.Apply bleached pulp defibrination novel process of the present invention, refining effect is good, greatly can reduce the energy consumption of defibrination process.Compared with traditional refining process, at defibrination under same beating degree, novel process of the present invention can make the tensile strength of bleached pulp improve 16%, and bursting strength improves 14%, and white water consistency reduces by 10%, and defibrination electric current declines more than 14%.
Embodiment
Prozyme of the present invention relates to four kinds of enzyme components, and it is 6.0 ~ 9.0 that its cellulase is suitable for pH value, and temperature 30 ~ 65 DEG C, can purchased from Novozymes Company; It is 5.0 ~ 10.0 that zytase is suitable for pH value, temperature 30 ~ 70 DEG C; Alkaline pectase is suitable for pH value 7.0 ~ 10.0, temperature 30 ~ 60 DEG C; Lipase is suitable for pH value 6.0 ~ 9.0, temperature 30 ~ 65 DEG C.
EXAMPLE l:
Raw material: import needlebush and leaf wood (1:1) bleached pulp.
Bleached pulp is joined in hydrapulpter and carry out size degradation, starch dense 6%, add a kind of prozyme prepared by the present invention simultaneously, unit of enzyme activity's content of its cellulase, zytase, alkaline pectase and lipase is respectively 300U/g, 400U/g, 400U/g and 60U/g, consumption is 100g/ ton slurry, and system temperature 40c, adds auxiliary agent, consumption 20g/ ton is starched, size degradation 15min; Then in pulp storage tank, (temperature 40 DEG C, pH7.5) stops 60min; Finally at the dense lower polydisc defibrination of 5% slurry, after defibrination, beating degree is 45 ° of SR.
Above-mentioned auxiliary agent is made up of sodium alkyl benzene sulfonate, oleic acid, sodium abietate, alkylphenol polyoxyethylene, polyoxyethylene octylphenol ether, tween 80, and the mass ratio of each component is 7:4:5:10:22:15.
With do not add prozyme and compare with the conventional processes of auxiliary agent, arrive under identical beating degree, after bleached pulp defibrination of the present invention, tensile strength improves 16%, and bursting strength improves 14%, and white water consistency reduces by 10%, and defibrination electric current declines 10%.
Embodiment 2:
Raw material: import needlebush bleached pulp.
Bleached pulp is joined in hydrapulpter and carry out size degradation, starch dense 5%, add above-mentioned prozyme (unit of enzyme activity's content of cellulase, zytase, alkaline pectase and lipase is respectively 700U/g, 1500U/g, 500U/g and 80U/g) simultaneously, consumption 200g/ ton is starched, system temperature 30 DEG C, add auxiliary agent, consumption 50g/ ton is starched, size degradation 10min; Then in pulp storage tank, (temperature 30 DEG C, pH6.0) stops 50min; Finally at the dense lower polydisc defibrination of 5% slurry, after defibrination, beating degree is 47 ° of SR.
Above-mentioned auxiliary agent is made up of sodium alkyl benzene sulfonate, oleic acid, sodium abietate, alkylphenol polyoxyethylene, polyoxyethylene octylphenol ether, tween 80, and the mass ratio of each component is 7:4:5:10:22:15.
With do not add prozyme and compare with the conventional processes of auxiliary agent, arrive under identical beating degree, after bleached pulp defibrination of the present invention, tensile strength improves 15%, and bursting strength improves 12%, and white water consistency reduces by 8%, and defibrination electric current declines 14%.
Claims (6)
1. a bleached pulp defibrination prozyme, described enzyme component is cellulase, zytase, alkaline pectase and lipase.
2. the prozyme according to claim l, is characterized in that: unit of enzyme activity's content of described cellulase, zytase, alkaline pectase and lipase is respectively: cellulase 300 ~ 700U/g, zytase 400 ~ 1500U/g, alkaline pectase 300 ~ 500U/g and lipase 50 ~ 100U/g.
3. the prozyme according to claim l is carrying out the application in defibrination to bleached pulp.
4. application according to claim 3, comprises the steps:
(1) carry out size degradation under bleached pulp being joined hydrapulpter, starch dense 5 ~ 10%, add the prozyme described in claim l simultaneously, consumption is 100 ~ 200g/ ton slurry, and adds auxiliary agent, and consumption 20 ~ 50g/ ton is starched; Whole system temperature is 30 ~ 60 DEG C, and beating time is 10 ~ 15min;
(2) slurry is by entering pulp storage tank after stock pump, pulp storage tank pH6.0 ~ 8.0, stops 40 ~ 60min, then grinds defibrination at the dense lower polydisc of 5 ~ 6% slurry, and after defibrination, beating degree is 45 ~ 52 ° of SR.
5. application according to claim 3, it is characterized in that described auxiliary agent is made up of sodium alkyl benzene sulfonate, oleic acid, sodium abietate, alkylphenol polyoxyethylene, polyoxyethylene octylphenol ether, tween 80, the mass ratio of each component is 7:4:5:10:22:15.
6. application according to claim 3, is characterized in that described bleached pulp is needlebush and/or leaf wood bleached pulp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410516899.2A CN105505902A (en) | 2014-09-30 | 2014-09-30 | Compound enzyme for grinding bleaching pulp and application process of compound enzyme |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410516899.2A CN105505902A (en) | 2014-09-30 | 2014-09-30 | Compound enzyme for grinding bleaching pulp and application process of compound enzyme |
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| CN105505902A true CN105505902A (en) | 2016-04-20 |
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| CN201410516899.2A Pending CN105505902A (en) | 2014-09-30 | 2014-09-30 | Compound enzyme for grinding bleaching pulp and application process of compound enzyme |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109810964A (en) * | 2017-11-21 | 2019-05-28 | 湖南海正生物科技有限公司 | A kind of mixing enzyme preparation and preparation method thereof for mashing |
| CN111635897A (en) * | 2020-05-22 | 2020-09-08 | 安徽沃斐瑞生物科技有限公司 | Wood fiberboard raw material modifying enzyme and modifying method |
| CN112359630A (en) * | 2020-09-29 | 2021-02-12 | 广西金桂浆纸业有限公司 | Wood chip treatment method, wood chip treatment system and chemi-mechanical pulp product |
| CN113046336A (en) * | 2021-02-07 | 2021-06-29 | 亚太森博(广东)纸业有限公司 | Complex enzyme and application thereof |
-
2014
- 2014-09-30 CN CN201410516899.2A patent/CN105505902A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109810964A (en) * | 2017-11-21 | 2019-05-28 | 湖南海正生物科技有限公司 | A kind of mixing enzyme preparation and preparation method thereof for mashing |
| CN111635897A (en) * | 2020-05-22 | 2020-09-08 | 安徽沃斐瑞生物科技有限公司 | Wood fiberboard raw material modifying enzyme and modifying method |
| CN112359630A (en) * | 2020-09-29 | 2021-02-12 | 广西金桂浆纸业有限公司 | Wood chip treatment method, wood chip treatment system and chemi-mechanical pulp product |
| CN112359630B (en) * | 2020-09-29 | 2023-04-18 | 广西金桂浆纸业有限公司 | Wood chip treatment method, wood chip treatment system and chemi-mechanical pulp product |
| CN113046336A (en) * | 2021-02-07 | 2021-06-29 | 亚太森博(广东)纸业有限公司 | Complex enzyme and application thereof |
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Application publication date: 20160420 |