CN106381741B - A kind of bamboo wood chemi-mechanical pulp biological enzyme preprocess method - Google Patents
A kind of bamboo wood chemi-mechanical pulp biological enzyme preprocess method Download PDFInfo
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- CN106381741B CN106381741B CN201610997546.8A CN201610997546A CN106381741B CN 106381741 B CN106381741 B CN 106381741B CN 201610997546 A CN201610997546 A CN 201610997546A CN 106381741 B CN106381741 B CN 106381741B
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/005—Treatment of cellulose-containing material with microorganisms or enzymes
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
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- Engineering & Computer Science (AREA)
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Abstract
Decatize storehouse is sent into the invention discloses a kind of bamboo wood chemi-mechanical pulp biological enzyme preprocess method, after bamboo chip screening and carries out normal pressure presteaming, then carries out first segment screw extrusion；Material after extruding adds in biological enzyme and is pre-processed, and then carries out high-temperature inactivation, washing dehydration, then carries out first segment and second segment Chemical impregnation, Ran Houyong successivelyHighly concentrated mill carries out the highly concentrated atmospheric refining runs of first segment, and slurry is stopped about 50~60min in highly concentrated reaction warehouse completes bleaching action；Then follow-up defibrination is carried out with mill again, pass through the different refining energy consumption of control input, produce the slurry sample of different Canadian freeness, and record produces the refining energy consumption needed for each slurry sample respectively, difference slurry sample after the latent, acidifying that disappears, washing, screening, dehydration concentration, is tested respectively for pulp property.The present invention is by the way that bamboo biological enzyme pretreatment, difference of the observation with tradition PRC APMP pulping process in terms of refining energy consumption and slurry performance is provided to prepare chemi-mechanical pulp by raw material of bamboo with reference to technique.
Description
Technical field
The present invention relates to paper industry, more particularly to a kind of bamboo wood chemi-mechanical pulp biological enzyme preprocess method.
Background technology
The fast development of paper industry makes China become the major producing country of world's papermaking product and disappear in global range
Fei Guo, output and consumption figure occupy second place of the world.And the problem of environmental pollution of the shortage of paper making raw material and paper industry is already
As the biggest problem for restricting China's Paper Industry Development.The National Development and Reform Commission exists within 2007《Papermaking industry development
Policy》In just explicitly point out and make full use of domestic and international two spike-type cultivars, improve specific gravity of wood, expand waste paper and recycle, rationally make
With non-wood pulp, gradually form with wood-fibred, based on waste paper, the papermaking material structure supplemented by non-wood fiber.Therefore with reference to me
State's actual conditions, according to the corresponding policy of country, for how to make good use of non-wood fibrous raw material resource, protect ecological environment and
Good pollution is administered, promotes China's paper industry sustainable and healthy development, is as early as possible configured to China's paper industry " environmental-friendly
The Modern China paper industry of type " and " resource-conserving " just becomes an important and pressing task.
Bamboo high yield pulp1 reducing rules have the characteristics that investment is low, paper pulp yield is high, chemical cost is few, and remain big
Lignin is measured, with [Geng Xiujuan, the emerging bamboos of Xiaxin such as the no some characteristics of chemical pulp, such as high bulk, excellent printing performances
The progress [J] of material chemical-mechanical pulping, Heilungkiang papermaking, the 2011, the 4th phase：31-33], the country is to bamboo high yield pulp1 at present
The research of slurrying be still concentrated mainly on High brightenss bleach in terms of research, such as South China Science ＆ Engineering University's Chen Li brightness, Zhan Huaiyu et al.
[Chen Lihui, Jiang Maosheng, Zhan Huaiyu, wait research [J] Fujian rice wines of High-yield Pulping of Phyllostachys heterocycla cv pubescens with Steam Explosion Process, and 2001,
21(3)：224-227.] research of High-yield Pulping of Phyllostachys heterocycla cv pubescens with Steam Explosion Process has been carried out, research shows the single hop mistake using dosage 4%
Hydrogen oxide is bleached, and whiteness also can only achieve 61% (ISO) after the bleaching of mao bamboon explosion pulp；Huang Xiannan, Zhan Huaiyu et al. [Huang Xiannan,
Zhan Huaiyu, Wang Shuanfei wait lingnania chugii chemi-mechanical pulps H2O2Research [J] Paper Science ＆ Technologies of bleaching, 2006,25 (1)：
7-9.] lingnania chugii is used as raw material, using highly concentrated H2O2Bleaching, can float lingnania chugii CTMP to the whiteness of more than 60%ISO.But
It is few researchs that biological enzyme pretreatment is carried out to bamboo material and prepares chemi-mechanical pulp.
The content of the invention
In order to solve technical problem in the prior art, the present invention proposes a kind of bamboo wood chemi-mechanical pulp biological enzyme
Preprocess method.
To realize above-mentioned technical purpose, the present invention proposes a kind of bamboo wood chemi-mechanical pulp biological enzyme preprocess method, wraps
Include following steps：
(1) bamboo chip after the screening of TMI chip screens, be sent into decatize storehouse after hot water washs and carry out the pre- vapour of normal pressure by qualified bamboo chip
It steams, bamboo chip carries out first segment screw extrusion after decatize；
(2) material after squeezing adds in biological enzyme, carries out biological enzyme pretreatment, carries out high-temperature inactivation after finishing, and washing is de-
Then water carries out first segment Chemical impregnation, complete the material washing dehydration after first segment dipping, carry out second segment chemical presoaking
Stain, two sections dipping after useHighly concentrated mill carries out the highly concentrated atmospheric refining runs of first segment, and stock freeness is controlled in about 600mL
CSF~700mL CSF；Slurry stops about 50~60min in highly concentrated reaction warehouse after first segment mill, therebetween monitoring temperature, pH value,
Residual hydrogen peroxide and the amount of sodium hydroxide are surveyed in reaction end, completes bleaching action；
(3) complete the paper pulp after bleaching action and carry out follow-up defibrination with mill again, pass through the different defibrination energy of control input
Consumption produces the slurry sample of different Canadian freeness, and record produces the refining energy consumption needed for each slurry sample, difference slurry sample difference respectively
After the latent, acidifying that disappears, washing, screening, dehydration concentration, tested for pulp property.
Preferably, in step (1), the condition of presteaming is：100~105 DEG C of presteaming temperature, time are 15~20min.
Preferably, the compression ratio of first segment screw extrusion is 4:1~5:1.
Preferably, the condition of biological enzyme pretreatment is：The condition of biological enzyme pretreatment is：In 50~55 DEG C of condition of temperature
It is lower add in 15~20% biological enzyme, react 100~120min under conditions of pH4.5~4.5, the concentration of biological enzyme for 15~
20U/g。
The biological enzyme is cellulase or zytase.
The condition of first segment Chemical impregnation is：H2O2Dosage 2.0kg/ (t oven dry stocks), NaOH dosages 1.5kg/ (t over dry
Slurry), Na2SiO3Dosage 0.5kg/ (t oven dry stocks), DTPA dosages 0.2kg/ (t oven dry stocks), chemical impregnation concentration 20%-30%,
90-95 DEG C of temperature, time 50-60min.
The condition of second segment Chemical impregnation is：H2O2Dosage 8.0kg/ (t oven dry stocks), NaOH dosages 2.5kg/ (t over dry
Slurry), Na2SiO3Dosage 1.5kg/ (t oven dry stocks), DTPA dosages 0.5kg/ (t oven dry stocks), chemical impregnation concentration 20%-30%,
Temperature 60 C, time 30-40min.
Advantageous effect：The present invention is by carrying out bamboo wood biological enzyme pretreatment, observation and tradition PRC-APMP pulping process
Difference in terms of refining energy consumption and slurry performance is provided to prepare chemi-mechanical pulp by raw material of bamboo with reference to technique, as a result
Show to pre-process bamboo material using biological enzyme and can effectively reduce Specific energy, gathered using cellulase and wood
Carbohydrase pre-processes, paper pulp be milled to Canadian freeness for 300ml or so when, Specific energy reduces 60kWh/t and 273kWh/ respectively
T, fall respectively reach 3.73% and 16.96%, in addition, after biological enzyme pretreatment, in identical freeness level's condition
Under, in addition to tear index is declined, tensile index is improved the physical strength of bamboo wood paper pulp with burst index, while with
Control sample is compared, and bamboo wood paper pulp overall whiteness after xylanase pretr eatment is optimal, up to 53.6%ISO, is secondly fibre
Paper pulp after the plain enzymatic treatment of dimension, highest whiteness are 53.37%ISO.
Description of the drawings
Fig. 1 is the influence of different biological enzyme pretreatment Specific energies；
Fig. 2 is influence of the different biological enzyme pretreatments to paper pulp bulk；
Fig. 3 (a)~Fig. 3 (c) is influence of the biological enzyme pretreatment to pulp physical strength performance；
Fig. 4 is influence of the biological enzyme pretreatment to paper pulp optical property.
Specific embodiment
Below by specific embodiment, the present invention will be described in detail.
Experimental procedure：Bamboo chip after the screening of TMI chip screens, be sent into decatize storehouse after hot water washs and carry out often by qualified bamboo chip
Presteaming is pressed, 105 DEG C, time 15min of presteaming temperature, bamboo chip carries out first segment screw extrusion (compression ratio 4 after decatize:1,
Similarly hereinafter), material adds in biological enzyme after extruding, carries out biological enzyme pretreatment, carries out high-temperature inactivation after finishing, and washing dehydration carries out
First segment Chemical impregnation completes the material washing dehydration after first segment dipping, carries out second segment Chemical impregnation, two sections of dippings
After useHighly concentrated mill carries out the highly concentrated atmospheric refining runs of first segment, and stock freeness is controlled in about 600mLCSF~700mL
CSF.First segment mill after slurry stopped in highly concentrated reaction warehouse about 60min (monitoring temperature therebetween, pH value, reaction end survey it is residual
The amount of remaining hydrogen peroxide and sodium hydroxide) complete bleaching action.The paper pulp after bleaching action is completed subsequently to be ground with mill again
Slurry by the different refining energy consumption of control input, produces the slurry sample of 4 different Canadian freeness, and records produce respectively respectively
Starch the refining energy consumption needed for sample.Difference starches sample respectively after the latent, acidifying that disappears, washing, screening, dehydration concentrate, for paper pulp
It can test.
Wherein, bamboo biological enzyme pretreatment pulping process condition is as shown in table 1：
Table 1
In bamboo wood PRC-APMP biological enzyme pretreatment stages, cellulase, zytase and blank sample are separately added into,
Study influence of the bamboo wood PRC-APMP biologies enzyme pretreatment to pulpability.Pulping process refers to table 1.
Slurry processing and test
Refining energy consumption is tested：The measurement accuracy of fiberizer electric energy recording instrument is 0.007kWh.
Specific energy calculation formula：
Paper pulp disappears latent：Device is discongested using Britain's Messer company standards, is 3%, temperature in slurry concentration (mass fraction)
Under the conditions of 85 DEG C, the latent 10min that disappears is stirred.
Acidifying：The different Canadian freeness slurries of acquisition under conditions of concentration is 3% (mass fraction), use 1mol/
The sulphur acid for adjusting pH value of L is acidified stir about 10min, slurry is dehydrated, washed after acidifying, is washed rear slurry pH value and is to 6 or so
It is neutral.
Pulp property detects：To the different Canadian freeness slurries of acquisition, using Britain's Messmer sheet formers
(band plain boiled water cycles) carries out manual handsheet, copies and takes 60g/m2Page is placed in thermostatic constant wet chamber's drying, tears off page, marked by correlation
Quasi- regulation is detected the physical property and optical property of paper.
The present invention keeps other experimental conditions one first in order to study influence of the different biological enzyme pretreatments to refining energy consumption
It causes, including enzyme dosage 20U/g, 50 DEG C of reaction temperature, pre-preg concentration 15%, reaction time 120min, pH4.8, primary study
Influence of the different biological enzyme to slurrying Specific energy and slurry performance.Result of study is as follows.
(1) to the influence of Specific energy
Since Specific energy is one of prime cost caused by reducing rules production, ensuring what pulp quality was stablized
In the case of, it is the target that all reducing rules manufacturing enterprises are pursued to be reduced as far as Specific energy.Generally, for specific
Raw pulp, Specific energy only it is related with the dipping effect of wood chip in pulping process, the dipping effect of wood chip is good, defibrination process
Middle fiber is then easily isolated, and required Specific energy is with regard to low, conversely, the Specific energy then needed is high.Impregnation stage is shown in Fig. 1
The bleeding agent of different amounts is added, the Specific energy needed for leaflet eucalyptus P-RC APMP slurries is made.As seen from Figure 1, using life
Object enzyme, which pre-processes bamboo material, can effectively reduce Specific energy.With 1# control samples (not carrying out biological enzyme pretreatment)
It compares, cellulase and zytase is separately added into the bamboo biological enzyme pretreatment stage, the Specific energy of slurrying has different journeys
The decline of degree, and Specific energy declines more apparent, the defibrination of addition cellulase pretreatment after addition xylanase pretr eatment
Power consumption fall unobvious.As shown in Fig. 2, after using the biological enzyme pretreatment of same amount, different refining energy consumptions is inputted,
The slurry sample of 4 different Canadian freeness is produced, compared with 1# control samples, the Specific energy after xylanase treatment is significantly low
In control sample, paper pulp be milled to Canadian freeness for 300ml or so when, Specific energy reduces 60kWh/t and 273kWh/t respectively,
Fall respectively reaches 3.73% and 16.96%.This may be that the effect of biological enzyme makes the interior of bamboo material fiber finer cell wall
Portion's institutional framework becomes more loose, and medicinal liquid osmosis effect has obtained a degree of improvement, and the softening degree of wood chip is more preferable, mill
Easy wire-dividing broom purification during slurry, so that Specific energy declines.
(2) to the influence of bulk
After Fig. 2 shows biological enzyme pretreatment, the bulk situation of change of bamboo wood PRC-APMP paper pulp.It can from figure
Go out, after biological enzyme pretreatment bamboo wood, the bulk of paper pulp is declined compared with control sample.When freedom is in 300ml or so
When, the bulk of control sample is 3.41cm2.g-1, cellulase treated paper pulp bulk is 3.31cm2.g-1, and hemicellulose
Paper pulp bulk after plain enzymatic treatment is 3.28cm2.g-1, the pretreated paper pulp bulky of biological enzyme when freedom gradually increases
Degree declines more apparent.
(3) to the influence of strength character
Fig. 3 (a)~(c) is influence of the biological enzyme pretreatment to pulp physical strength performance, it can be seen from the figure that biological
After enzyme pretreatment, under the conditions of identical freeness level, the physical strength of bamboo wood paper pulp resists in addition to tear index is declined
Tensile index is improved with burst index, this may be since biological enzyme pretreatment causes the average length of fiber to reduce, therefore
Paper pulp tear index declines；Under the action of not having, fiber is degraded so that and fiber is easy to wire-dividing broom purification during defibrination, from
And paper pulp tensile index is increased with burst index.
(4) to the influence of optical property
Fig. 4 is that bamboo wood is after PRC-APMP pulping process after biological enzyme pretreatment, and paper pulp is white under the conditions of different freedoms
Degree, the total dosage 10% of hydrogen peroxide (to over dry bamboo pulp amount), the total dosage 4% of sodium hydroxide.It can be seen from the figure that and control sample
It compares, bamboo wood paper pulp overall whiteness after xylanase pretr eatment is optimal, up to 53.6%ISO, is secondly cellulase
Treated paper pulp, highest whiteness are 53.37%ISO, this illustrates bamboo wood by biological enzyme pretreatment, make fiber obtain activation and
Relaxation, effect of rising is moistened in the water suction for improving fiber, and hemicellulose is made to obtain a degree of degradation so that liquid is easier to ooze
Thoroughly, follow-up alkaline hydrogen peroxide bleaching is conducive to.
Bamboo wood PRC-APMP pulping process, bamboo material, which is pre-processed, using biological enzyme can effectively reduce defibrination
Power consumption, using cellulase and xylanase pretr eatment, paper pulp be milled to Canadian freeness for 300ml or so when, Specific energy
60kWh/t and 273kWh/t is reduced respectively, and fall respectively reaches 3.73% and 16.96%.
After biological enzyme pretreatment, under the conditions of identical freeness level, the physical strength of bamboo wood paper pulp removes tear index
Outside being declined, tensile index is improved with burst index.
Compared with control sample, bamboo wood paper pulp overall whiteness after xylanase pretr eatment is optimal, and up to 53.6%
Secondly ISO is cellulase treated paper pulp, highest whiteness is 53.37%ISO.
Claims (5)
1. a kind of bamboo wood chemi-mechanical pulp biological enzyme preprocess method, which is characterized in that include the following steps：
（1）Bamboo chip after the screening of TMI chip screens, be sent into decatize storehouse after hot water washs and carry out normal pressure presteaming, vapour by qualified bamboo chip
Bamboo chip carries out first segment screw extrusion after steaming；
（2）Material after extruding adds in biological enzyme, carries out biological enzyme pretreatment, specifically under conditions of 50 ~ 55 DEG C of temperature plus
Enter 15 ~ 20% biological enzyme, react 100 ~ 120min under conditions of pH4.5 ~ 4.5, the concentration of biological enzyme is 15 ~ 20 U/g, institute
The biological enzyme stated is cellulase or zytase；High-temperature inactivation is carried out after finishing, then washing dehydration carries out first segment chemistry
The material washing dehydration after first segment dipping is completed in pre-preg, is carried out second segment Chemical impregnation, is used after two sections of dippings
300 highly concentrated mills carry out the highly concentrated atmospheric refining runs of first segment, and stock freeness is controlled in 600mL CSF ~ 700mL CSF；First segment
Slurry stops 50 ~ 60 min in highly concentrated reaction warehouse and completes bleaching action after mill；
（3）It completes the paper pulp after bleaching action and carries out follow-up defibrination with mill again, pass through the different refining energy consumption of control input, system
The slurry sample of different Canadian freeness is taken, and record produces the refining energy consumption needed for each slurry sample respectively, difference slurry sample passes through respectively
Disappear after latent, acidifying, washing, screening, dehydration concentration, tested for pulp property.
2. bamboo wood chemi-mechanical pulp biological enzyme preprocess method according to claim 1, which is characterized in that step（1）In,
The condition of presteaming is：100 ~ 105 DEG C of presteaming temperature, time are 15 ~ 20 min.
3. bamboo wood chemi-mechanical pulp biological enzyme preprocess method according to claim 1, which is characterized in that first segment spiral
The compression ratio of extruding is 4:1~5:1.
4. bamboo wood chemi-mechanical pulp biological enzyme preprocess method according to claim 1, which is characterized in that first segment chemistry
The condition of pre-preg is：H2O2Dosage be 2.0kg/ oven dry stocks per ton, NaOH dosages 1.5kg/ oven dry stocks per ton, Na2SiO3Dosage
0.5kg/ oven dry stocks per ton, DTPA dosages 0.2kg/ oven dry stocks per ton, chemical impregnation concentration 20%-30%, 90-95 DEG C of temperature, when
Between 50-60min.
5. bamboo wood chemi-mechanical pulp biological enzyme preprocess method according to claim 1, which is characterized in that second segment chemistry
The condition of pre-preg is：H2O2Dosage 8.0kg/ oven dry stocks per ton, NaOH dosages 2.5kg/ oven dry stocks per ton, Na2SiO3Dosage
1.5kg/ oven dry stocks per ton, DTPA dosages 0.5kg/ oven dry stocks per ton, chemical impregnation concentration 20%-30%, temperature 60 C, time
30-40min。
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| 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 |
| CN113832757A (en) * | 2021-09-02 | 2021-12-24 | 浙江鹤丰新材料有限公司 | Two-section extrusion and two-section impregnation bio-mechanical pulping process |
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| CN114921992B (en) * | 2022-06-01 | 2023-04-28 | 齐鲁工业大学 | Preparation method of bio-mechanical pulp treated by biological enzyme |
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