CN107663800A - A kind of true qualities poplar slurry and its production technology - Google Patents
A kind of true qualities poplar slurry and its production technology Download PDFInfo
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- CN107663800A CN107663800A CN201710913186.3A CN201710913186A CN107663800A CN 107663800 A CN107663800 A CN 107663800A CN 201710913186 A CN201710913186 A CN 201710913186A CN 107663800 A CN107663800 A CN 107663800A
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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
-
- 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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/02—Straining or screening the pulp
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F9/00—Complete machines for making continuous webs of paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/16—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment
- D21H11/20—Chemically or biochemically modified fibres
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Abstract
The present invention provides a kind of true qualities poplar slurry, and poplar pulp brightness 28~30%, the cm3/g of bulk 1.60~1.95, hardness is 15~25K.The present invention also provides a kind of preparation technology of true qualities poplar slurry, and preparation technology includes incubation step, and incubation step includes final relief；When it is 0 that rotary spherical digester, which is deflated to pressure, in final relief step, black liquor is injected in rotary spherical digester；3~8 sides of black liquor amount/ball in the injection rotary spherical digester.The characteristics of present invention makes full use of true qualities poplar pulp brightness low, the black liquor after boiling can be recycled, and realize the whole zero-emission of black liquor, more improve the uniformity of poplar slurry between the different batches of preparation, further improve the quality of finished product；True qualities poplar slurry prepared by the present invention, tensile index is higher, and tear index is relatively low, is highly suitable for the production and manufacture of paper for daily use, has timber natural color and style, soft, natural.
Description
Technical field
The present invention relates to a kind of wood pulp and its production technology, particularly a kind of true qualities poplar slurry and its production technology.
Background technology
At present, generally the still wood pulp paper of visible paper for daily use is in the majority now in the market, and wood pulp paper generally refers to timber and is
Raw material, the paper being fabricated to through techniques such as mashing, boiling, bleachings, papery exquisiteness, softness, any surface finish, whiteness height etc. are excellent
Point；But the organic chloride in waste water, it is to be currently known because waste water environmental pollution caused by production process is very serious
Organic compound in most malicious material, all living things are known from experience and cause i.e. carcinogenic three cause effects, mutagenesis, teratogenesis.
True qualities poplar slurry is a kind of only by the unbleached chemical poplar slurry of boiling, is not added with any chemical bleaching agent, therefore be
A kind of ecosystem natural color pulp of environmentally-friendly sanitary, true qualities poplar slurry because without bleaching schedule, not producing the carcinogens such as bioxin,
Therefore, as progressively attention of the people to environment-friendly products, the production of true qualities poplar slurry have more wide market environment；Together
When, the features such as poplar is a kind of fast-growing tree species, and it is adaptable wide, growth period in year is long, speed of production is fast, south China
And there is an extensive plantation in the north, for Poplar Resource compared with horn of plenty, thus the production for paper pulp, which provides, sustainable utilizes raw material；
Simultaneously poplar wood have that in light weight, intensity is high, elasticity is good, fiber is long and the advantages of content is high.
The patent application of Patent No. 201610960356.9, a kind of physiology paper of no bleaching agent antibacterial, including without drift
White original paper layer and the antibiotic layer composition without bleaching original paper layer being sprayed at, the raw material of use is more, complex, and cost is higher,
Condition without production in enormous quantities.
Patent No. CN201210170739.8, patent name are：True qualities bamboo pulp is composite modified with true qualities wood pulp to be
The patent of invention of the digesting technoloy of dissolving pulp, it is that bamboo pulp, wood pulp composite pulp are sent into tubular continuous digester to carry out boiling, continuously
The steam pipe of boiling vessel is set to 3 sections, and one section to be connected with pre-reaction feed bin is provided with the T-shaped pipe for adding alkali lye and the steaming for adding steam
Steam pipe, other two sections are equipped with the steam pipe for adding steam, and its digesting technoloy requires as follows：Liquor ratio：1:2.0~4.0；By over dry
The 17~30% of weight add alkali lye；One section of the vapor (steam) temperature being connected with pre-reaction feed bin of steam pipe is 105 ± 5 DEG C；It is middle
One section of vapor (steam) temperature is 140 ± 5 DEG C；One section of vapor (steam) temperature being connected with cold spraying device is 150 DEG C~175 DEG C；Compression
Than：1：2~3.0.The invention is to use different stock methods, reaches production true qualities wood pulp by bamboo pulp and the compounding of wood pulp
Purpose, but compound wood pulp prepared by the invention, whiteness still do not meet modern and tends to nature and pseudo-classic up to more than 70
Style and aesthetic.
All in all, the present situation of wood pulp is prepared in the prior art, and there is following technological deficiency：
1st, complex process, production cost are high；
2nd, wood pulp prepared by prior art, general whiteness is higher and fluctuates larger, and whiteness bound is unstable, while does not have
There are nature and pseudo-classic style；
3rd, in prior art pulping process, caused black liquor not reusable edible causes to waste and environmental pollution；
4th, in the prior art, the true qualities wood pulp of high bulk is not found to prepare temporarily using poplar as raw material, main cause is existing
For natural color pulp without PROCESS FOR TREATMENT, bulk hardly results in raising in technology.
The content of the invention
In view of the shortcomings of the prior art, first goal of the invention of the invention is to provide a kind of true qualities poplar slurry, the present invention
The true qualities poplar slurry of preparation meets following index：Whiteness 28~30%, the cm of bulk 1.60~1.953/ g, hardness be 15~
25K, ash content are≤0.12%, dust≤100mm2/m2；
Second goal of the invention of the present invention is to provide a kind of production technology of true qualities poplar slurry, specifically includes following steps：
（1）Boiling：Poplar is cut into slices and transported by traction to conveying worm, is added in conveying worm stage casing and has matched somebody with somebody most intimate friend's
Alkali lye and digesting assistant；After poplar section is well mixed in conveying worm with alkali lye and digesting assistant, by mixed poplar
Wood section loads rotary spherical digester by ball feeder, carries out boiling；
The index that the poplar section meets：Moisture≤25%, between 0.8~1.8mm of thickness, free from admixture and bark, without black rotten.
The temperature of alkali lye is 80~100 DEG C in the addition conveying worm；
The pitching amount that poplar is cut into slices in wherein described rotary spherical digester（Air-dry）For 8.5~9.0t/ balls；
The boiling alkali charge is 18~22%；
The cooking liquor ratio is 1:2~4；
The dosage of the digesting assistant is 7~8kg/ balls；The digestant is novel anthraquinone, preferably Henan Hong Ruide new materials section
Skill Co., Ltd produces；The mesh of novel anthraquinone fineness 100, moisture content≤0.2%, free quinone >=45%, effective active thing >=
53.5%th, insoluble matter≤0.5%；Novel anthraquinone has very strong wetting, penetrating power, can promote caustic soda rapidly by fiber surface
Soak and penetrate into inside, accelerate colloid dissolving and delignification, shorten digestion time 20-30%；Reduction black liquid amount 10~
20%, alkali charge 5%~10% is reduced, pollution treatment expense is reduced, is advantageous to environmental protection；
Novel anthraquinone can form polymer protective film in fiber surface, and the terminal groups of carbohydrate can be made to be reduced into alkali stabilization
Primary alconol base, so as to effectively restrain peeling reaction, protect fiber, can effectively protect fiber, fiber peeling reaction is prevented, into slurry
Fibre strength is big, and starch degree declines 2~6 manganese values, meanwhile, can be significantly by the combination of novel anthraquinone and present invention process
Improve fiber bulk.
Novel anthraquinone can effectively prevent silicon class compound, calcium and magnesium compound from forming solid content, so as to significantly reduce evaporator
And pipeline scale.
（2）Heating：After filling ball, rotary spherical digester is covered, by 5~20min of rotary spherical digester idle running；Preferably 10min；After risen
Temperature；The purpose of rotary spherical digester idle running is that further the poplar in rotary spherical digester is cut into slices to be mixed with alkali lye and digesting assistant；
The heating once small steam bleeding among temperature-rise period, is easy to poplar slurry to be heated up once to heat up；
The small steam bleeding time is 5~10min；
Pressure is 0.3~0.6MPa after the small steam bleeding；Temperature is 140~160 DEG C after the small steam bleeding；
The heating-up time is controlled in more than 50min, and temperature is uniformly slowly raised to 165~175 DEG C；The extension of heating-up time
With the slow uniformity for heating up, can preferably ensureing chip steaming, the bulky for the true qualities poplar slurry that further prepared by raising
Degree.
（3）Insulation：After heating, by cooking pressure stable progress rotary spherical digester insulation, soaking time between 0.7~0.75MPa
40~70min, it is incubated 30~50min（It is preferred that 40min）Start to test slurry with testing slurry valve afterwards, when test starch slurry hardness 16~
Big steam bleeding is carried out after 18K scopes；
The final relief put to pressure be 0 when, toward injection black liquor in ball；Temperature in ball is reduced rapidly, conveniently kick off to cover, simultaneously
Reduce pollution and water waste；
3~8 sides of black liquor amount/ball in the injection rotary spherical digester, lid batch turning of being kicked off after cooling.
（4）Pulp washing：Slurry is poured under ball behind pond in ball, will with stock pump with recycled black liquor diluted slurry concentration to 3% or so
Slurry is beaten to vanning and sifts out the impurity such as knaur, is starched after sieve and carries out pulp washing by front and rear Horizontal belt pulp dresser twice respectively；
It is described to wash the control of disposed slurry residual alkali in below 0.2g/l；
After slurry washing, the black liquor that a part extracts send alkali collection；Circulation diluted slurry and rotary spherical digester in a part of black liquor system
Cooling is used.
（5）Removal of impurities：Slurry continues through pressurized screen removal of impurities, and good slurry delivers to three sections of scummer slagging-off of two level, and remove the gred disposed slurry
Dilute, wash again to stock tank after decker；The concentration of the diluted slurry is 2~4%, delivers to pulp machine and manufactures paper with pulp；
0.13~0.17MPa of the pressurized screen pressure；
The decker concentration disposed slurry concentration is 8~12%.
（6）Manufacture paper with pulp：
It is described to manufacture paper with pulp including pulp storage tank, wet end, press section, drying section, cut reason paper machine, packing process of weighing；
The dense pulp storage tank slurry is 2.5~3%；
The wet end online concentration is 1.2~1.5%, goes out wet end slurry page mass dryness fraction ＞ 20%；
The press section includes a nip, two nips, three nips；One nip pressure is 3.5~4.5kg, two nip
Pressure is 4.5~5.5kg；Three nip pressure is 5.5~6.5kg；Go out three nips slurry page mass dryness fraction ＞ 58%；
The drying section, enter drying cylinder air pressure≤0.4MPa；
It is 10 ± 1.5 ﹪, quantification of 700 ± 100g/ ㎡ to go out drying section slurry page moisture.
By adopting the above-described technical solution, the present invention reach have the technical effect that：
1st, the characteristics of present invention makes full use of true qualities poplar pulp brightness low, the black liquor after boiling can be recycled, and part black liquor enters
Enter alkali collection, part black liquor continues washing next time, not only realizes the whole zero-emission of black liquor, more improves preparation
Different batches between poplar pulp brightness homogeneity, further increase the quality of finished pulp；
2nd, the true qualities poplar slurry that prepared by the present invention, tensile index is higher, and tear index is relatively low, is highly suitable for paper for daily use
Production and manufacture, there is timber natural color and style, it is soft, it is natural；
3rd, the finished product true qualities poplar slurry that prepared by the present invention, meets following index：Whiteness 28~30%, bulk 1.60~1.95
cm3/ g, hardness are 15~25K, and ash content is≤0.12%, dust≤100mm2/m2；Whiteness directly embodies style and the preparation of log
The outward appearance of paper for daily use is felt, when whiteness is 28-30%, manufactured paper products, is more bonded natural style and charm；
4th, the true qualities poplar slurry tensile index that prepared by the present invention is higher, is made up to 80.81-95.28 N.m/g, particularly embodiment 3
Standby true qualities poplar slurry tensile index highest, while tear index is relatively low on the contrary, is more suitable for doing manual labour and uses paper；
5th, the present invention overcomes the defects of prior art, and the true qualities poplar slurry bulk of preparation is higher, up to 1.95 cm3/ g, pine
The height of thickness directly affects the follow-up processing characteristics of finished product poplar pulpboard；The true qualities poplar prepared simultaneously by the invented technology
It is thick to starch weight in wet base, average fiber length length, fibre strength is high, reduces downstream product production cost, the poplar prepared using the present invention
Production and living paper and other paper products are starched, it is per ton to reduce cost about more than 20%；
6th, during the present invention prepares true qualities poplar slurry, circulated by using novel anthraquinone, the combination of optimization digesting technoloy and black liquor
Control, black liquor is reusable, can reach whole black liquor zero-emission, meets the environmental protection concept of modern development；
7th, the technique of present invention preparation true qualities poplar slurry is simple, can be produced in enormous quantities；
8th, the present invention prepares the process of true qualities poplars slurry, no bleaching stage, without organic chloride in waste water, environment will not be caused dirty
Dye, does not produce carcinogenic, teratogenesis completely.
Embodiment
It is that technical scheme is clearly and completely described by embodiment by the present invention below, it is clear that institute
The embodiment of description is only the part of the embodiment of the present invention, rather than whole embodiments, based on the implementation in the present invention
Example, the every other technical scheme that those of ordinary skill in the art are obtained under the premise of creative work is not made, all belongs to
In the scope of protection of the invention.
A kind of production technology of true qualities poplar slurry of embodiment 1
Comprise the following steps：
Second goal of the invention of the present invention is to provide a kind of production technology of true qualities poplar slurry, specifically includes following steps：
（1）Boiling：Poplar is cut into slices and transported by traction to conveying worm, is added in conveying worm stage casing and has matched somebody with somebody most intimate friend's
Alkali lye and digesting assistant；After poplar section is well mixed in conveying worm with alkali lye and digesting assistant, by mixed poplar
Wood section loads rotary spherical digester by ball feeder, carries out boiling；
The index that the poplar section meets：Moisture 22%, between thickness 0.8mm, free from admixture and bark, without black rotten.
The temperature of alkali lye is 80 DEG C in the addition conveying worm；
The pitching amount that poplar is cut into slices in wherein described rotary spherical digester（Air-dry）For 8.5t/ balls；
The boiling alkali charge is 18%；
The cooking liquor ratio is 1:2；
The dosage of the digesting assistant is 7.1kg/ balls；The digestant novel anthraquinone, preferably Henan Hong Ruide new materials science and technology
Co., Ltd produces；The mesh of novel anthraquinone fineness 100, moisture content≤0.2%, free quinone >=45%, effective active thing >=
53.5%th, insoluble matter≤0.5%；
（2）Heating：After filling ball, rotary spherical digester is covered, will be heated up after rotary spherical digester idle running 5min；Rotary spherical digester idle running purpose be into
Poplar in rotary spherical digester is cut into slices and mixed with alkali lye and digesting assistant by one step；
The heating once small steam bleeding among temperature-rise period, is easy to poplar slurry to be heated up once to heat up；
The heating-up time is controlled in 55min, and temperature is uniformly slowly raised to 175 DEG C；The extension of heating-up time and slowly
It heating, can preferably ensure the uniformity of chip steaming, reduce the caused vigorous oxidation to cellulose of violent heating, enter
One step improves the bulk and tensile index of the true qualities poplar slurry prepared.
The small steam bleeding time is 5min；Pressure is 0.6MPa after the small steam bleeding；Temperature is 160 after the small steam bleeding
℃；
（3）Insulation：After heating, by the stable progress rotary spherical digester insulation between 0.75MPa of cooking pressure, 50min, insulation are incubated
After 42min i.e. start with test slurry valve test slurry, when test starch slurry hardness big steam bleeding is carried out after 16K scopes；
Final relief put to pressure be 0 when, toward injection black liquor in ball；Temperature in ball is reduced rapidly, conveniently kick off to cover, reduce simultaneously
Pollution and water waste；
5 sides of the black liquor amount/ball injected in rotary spherical digester, lid batch turning of being kicked off after cooling.
（4）Pulp washing：Slurry is poured under ball behind pond in ball, will with stock pump with recycled black liquor diluted slurry concentration to 3% or so
Slurry is beaten to vanning and sifts out the impurity such as knaur, is starched after sieve and carries out pulp washing by front and rear Horizontal belt pulp dresser twice respectively；After washing
Slurry residual alkali is controlled in below 0.2g/l；After washing, the black liquor that a part extracts is sent to alkali collection；In a part of black liquor system
Circulate diluted slurry and rotary spherical digester cooling is used；It is beaten after the completion of pulp washing, beating degree is 18 ° of SR；
（5）Removal of impurities：Slurry continues through pressurized screen removal of impurities, and good slurry delivers to three sections of scummer slagging-off of two level, and slagging-off disposed slurry passes through
Dilute, wash again to stock tank after decker；The concentration of diluted slurry is 2%, delivers to pulp machine and manufactures paper with pulp；
The pressurized screen pressure 0.13MPa；
The decker concentration disposed slurry concentration is 8%.
（6）Manufacture paper with pulp：
Manufacture paper with pulp including pulp storage tank, wet end, press section, drying section, cut reason paper machine, packing process of weighing；
Dense pulp storage tank slurry is 2.5~3%；
Wet end online concentration is 1.5%, goes out wet end slurry page mass dryness fraction ＞ 20%；
The press section includes a nip, two nips, three nips；One nip pressure is 3.5kg, and two nip pressure is
5.5kg；Three nip pressure is 5.5kg；Go out 3rd area slurry page mass dryness fraction ＞ 58%；
The drying section, enter drying cylinder air pressure≤0.4MPa；
It is 10.5 ﹪, quantification of 750g/ ㎡ to go out drying section slurry page moisture.
A kind of production technology of true qualities poplar slurry of embodiment 2
Comprise the following steps：
（1）Boiling：Poplar is cut into slices and transported by traction to conveying worm, is added in conveying worm stage casing and has matched somebody with somebody most intimate friend's
Alkali lye and digesting assistant；After poplar section is well mixed in conveying worm with alkali lye and digesting assistant, by mixed poplar
Wood section loads rotary spherical digester by ball feeder, carries out boiling；The index that poplar section meets：Moisture 18%, thickness 1.2-1.5mm, nothing
Impurity and bark, without black rotten；The temperature for adding alkali lye in conveying worm is 100 DEG C；The pitching that poplar is cut into slices wherein in rotary spherical digester
Amount（Air-dry）For 9.0t/ balls；Boiling alkali charge is 22%；Cooking liquor ratio is 1:3；
The dosage of digesting assistant is 7.5kg/ balls；Digestant is novel anthraquinone, preferably the limited public affairs of Henan Hong Ruide new materials science and technology
Department's production；It is the mesh of novel anthraquinone fineness 100, moisture content≤0.2%, free quinone >=45%, effective active thing >=53.5%, insoluble
Thing≤0.5%；
（2）Heating：After filling ball, rotary spherical digester is covered, will be heated up after rotary spherical digester idle running 15min；Rotary spherical digester idle running purpose be
Further the poplar in rotary spherical digester is cut into slices and mixed with alkali lye and digesting assistant；Heat up once to heat up, among temperature-rise period
Once small steam bleeding, it is easy to poplar slurry to be heated up；Heating-up time is controlled in 62min, and temperature is uniformly slowly raised to 170 DEG C；
The extension of heating-up time and slowly heating, can preferably ensure the uniformity of chip steaming, reduce violent heating
The caused vigorous oxidation to cellulose, further improve the bulk and tensile index of the true qualities poplar slurry prepared；Small steam bleeding
Time is 10min；Pressure is 0.4MPa after small steam bleeding；Temperature drops to 150 DEG C after small steam bleeding；
（3）Insulation：After heating, by the stable progress rotary spherical digester insulation between 0.75MPa of cooking pressure, soaking time 55min, insulation
After 40min i.e. start with test slurry valve test slurry, when test starch slurry hardness big steam bleeding is carried out after 18K；It is 0 that final relief, which is put to pressure,
When, toward the interior injection black liquor of ball；Temperature in ball is reduced rapidly, conveniently kick off to cover, while reduce pollution and water waste；Inject rotary spherical digester
Interior 8 sides of black liquor amount/ball, lid batch turning of being kicked off after cooling.
（4）Pulp washing：Slurry is poured under ball behind pond in ball, will with stock pump with recycled black liquor diluted slurry concentration to 3% or so
Slurry is beaten to vanning and sifts out the impurity such as knaur, is starched after sieve and carries out pulp washing by front and rear Horizontal belt pulp dresser twice respectively；After washing
Slurry residual alkali is controlled in below 0.2g/l；After extracting black liquor, washing, the black liquor that a part extracts send alkali collection；It is a part of black
Circulation diluted slurry and rotary spherical digester cooling are used in liquid system；It is beaten after the completion of pulp washing, beating degree is 25 ° of SR.
（5）Removal of impurities：Slurry continues through pressurized screen removal of impurities, and good slurry delivers to the slagging-off of two-stage two-segment scummer, and remove the gred disposed slurry
Dilute, wash again to stock tank after decker；The concentration of the diluted slurry is 4%, delivers to pulp machine and manufactures paper with pulp；Pressure
Screen pressing power 0.13MPa；Decker concentration disposed slurry concentration is 10%.
（6）Manufacture paper with pulp：Manufacture paper with pulp including pulp storage tank, wet end, press section, drying section, cut reason paper machine, packing process of weighing；Storage slurry
Dense pond slurry is 2.5%；Wet end online concentration is 1.5%, goes out wet end slurry page mass dryness fraction ＞ 20%；Press section include a nip, two nips,
Three nips；One nip pressure is 3.5kg, and two nip pressures are 5.5kg；Three nip pressures are 5.8kg；Go out 3rd area slurry page mass dryness fraction ＞
58%；Drying section enters drying cylinder air pressure 0.3MPa；It is 10 ﹪, quantification of 800g/ ㎡ to go out drying section slurry page moisture.
A kind of production technology of true qualities poplar slurry of embodiment 3
Comprise the following steps：
（1）Boiling：Poplar is cut into slices and transported by traction to conveying worm, is added in conveying worm stage casing and has matched somebody with somebody most intimate friend's
Alkali lye and digesting assistant；After poplar section is well mixed in conveying worm with alkali lye and digesting assistant, by mixed poplar
Wood section loads rotary spherical digester by ball feeder, carries out boiling；
The index that the poplar section meets：Moisture 23%, between thickness 1.0-1.4mm, free from admixture and bark, without black rotten；Add
The temperature of alkali lye is 100 DEG C in conveying worm；The pitching amount that poplar is cut into slices in rotary spherical digester（Air-dry）For 8.5t/ balls；Boiling alkali
Measure as 20%；Cooking liquor ratio is 1:2；
The dosage of digesting assistant is 8.0kg/ balls；The digestant novel anthraquinone, preferably Henan Hong Ruide new materials science and technology are limited
Company produces；The mesh of novel anthraquinone fineness 100, moisture content≤0.2%, free quinone >=45%, effective active thing >=53.5%, no
Molten thing≤0.5%.
（2）Heating：After filling ball, rotary spherical digester is covered, rotary spherical digester is dallied 20min；After heated up；The mesh of rotary spherical digester idle running
Be that further the poplar in rotary spherical digester is cut into slices to be mixed with alkali lye and digesting assistant；Heat up once to heat up, temperature-rise period
Middle once small steam bleeding, it is easy to poplar slurry to be heated up；
Heating-up time is controlled in 58min, and temperature is uniformly slowly raised to 165 DEG C；The extension of heating-up time and slowly heating,
The uniformity of chip steaming can preferably be ensured, reduce the caused vigorous oxidation to cellulose of violent heating, further
Improve the bulk and tensile index of the true qualities poplar slurry prepared；
The small steam bleeding time is 8min；Pressure is 0.6MPa after small steam bleeding；Temperature is 150 DEG C after small steam bleeding；
（3）Insulation：It is after heating, cooking pressure is stable in 0.75MPa or so progress rotary spherical digester insulations, soaking time 58min, insulation
After 35min i.e. start with test slurry valve test slurry, when test starch slurry hardness big steam bleeding is carried out after 16~18K scopes；
Final relief put to pressure be 0 when, toward injection black liquor in ball；Temperature in ball is reduced rapidly, conveniently kick off to cover, reduce simultaneously
Pollution and water waste；The side of black liquor amount 6 injected in rotary spherical digester, lid batch turning of being kicked off after cooling.
（4）Pulp washing：Slurry is poured under ball behind pond in ball, will with stock pump with recycled black liquor diluted slurry concentration to 3% or so
Slurry is beaten to vanning and sifts out the impurity such as knaur, is starched after sieve and carries out pulp washing by front and rear Horizontal belt pulp dresser twice respectively；After washing
Slurry residual alkali is controlled in below 0.2g/l；After washing extraction black liquor, the black liquor that a part extracts send alkali collection；A part of black liquor
Circulation diluted slurry and rotary spherical digester cooling are used in system；It is beaten after the completion of pulp washing, beating degree is 25 ° of SR.
（5）Removal of impurities：Slurry continues through pressurized screen removal of impurities, and good slurry delivers to three sections of scummer slagging-off of two level, and remove the gred disposed slurry
Dilute, wash again to stock tank after decker；The concentration of diluted slurry is 2~4%, delivers to pulp machine and manufactures paper with pulp；Pressurized screen
Pressure 0.15MPa；Decker concentration disposed slurry concentration is 12%.
（6）Manufacture paper with pulp：
Manufacture paper with pulp including pulp storage tank, wet end, press section, drying section, cut reason paper machine, packing process of weighing；Dense pulp storage tank slurry is 2.5%；
Wet end online concentration is 1.5%, goes out wet end slurry page mass dryness fraction ＞ 20%；Press section includes a nip, two nips, three nips；Described one
Nip pressure is 4.5kg, and two nip pressure is 4.5kg；Three nip pressure is 5.5kg；Go out 3rd area slurry page mass dryness fraction ＞
58%；
The drying section, enter drying cylinder air pressure≤0.4MPa；
It is 11.5 ﹪, quantification of 650g/ ㎡ to go out drying section slurry page moisture.
The index of correlation of the true qualities poplar slurry prepared below for the embodiment of the present invention 1,2,3, specific Testing index are shown in Table 1：
Table 1
As can be seen from the above table, the true qualities poplar pulp brightness that prepared by the present invention is moderate, meets the aesthetic requirement of modern, while this
True qualities poplar slurry tensile index prepared by invention is higher, and the true qualities poplar slurry slurry tensile index that particularly prepared by embodiment 3 reaches
95.28 N.m/g, while tear index is relatively low on the contrary, is more suitable for doing manual labour and uses paper.
In the present invention, invention personnel have found that the dosage of heating-up time, warming temperature and digesting assistant is prepared to the present invention
The index of true qualities poplar slurry produce important influence, the method that we use embodiment 3, change heating-up time, warming temperature
In the case of digesting assistant dosage, the indices of the true qualities poplar slurry of preparation, to find out optimal production technology, tool are detected
Body is shown in Table 2
Table 2
As can be seen from the above table, when in invention implementation process, heating-up time 58min, warming temperature is to 165 DEG C, digesting assistant
When dosage is 8.0, true qualities poplar slurry produced by the present invention, bulk is 1.95 cm3/ g, tensile index are 95.28 N.m/g,
Tear index is 5.40Mn.m2/ g, when warming temperature is more than 175 DEG C, when more than digesting assistant dosage 8kg, below 7kg, system
The indices of the true qualities poplar slurry obtained, which have, significantly to be declined, when optimised process of the invention is combined as heating in summary
Between >=50 DEG C, warming temperature is 165-175 DEG C, and digesting assistant dosage is 7-8kg/ balls.
In the present invention, rotary spherical digester volume is 40 sides；It should be noted that：The foregoing is only the preferred embodiments of the present invention and
, it is not intended to limit the invention, although the present invention is described in detail with reference to the foregoing embodiments, for this area
For technical staff, it can still modify to the technical scheme described in foregoing embodiments, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (10)
- A kind of 1. true qualities poplar slurry, it is characterised in that：The true qualities poplar pulp brightness 28~30%, bulk 1.60~1.95 cm3/ g, hardness are 15~25K.
- A kind of 2. true qualities poplar slurry according to claim 1, it is characterised in that：The preparing raw material poplar of the true qualities poplar slurry Wood section meet index be：Moisture≤25%, 0.8~1.8mm of thickness.
- A kind of 3. preparation technology of true qualities poplar slurry, it is characterised in that：The preparation technology includes incubation step, the insulation step Suddenly final relief is included；When it is 0 that rotary spherical digester, which is deflated to pressure, in the final relief step, black liquor is injected in rotary spherical digester；The injection 3~8 sides of black liquor amount/ball in rotary spherical digester.
- A kind of 4. preparation technology of true qualities poplar slurry according to claim 3, it is characterised in that：The preparation technology also wraps Include pulp washing step：Slurry after the completion of boiling is poured under ball behind pond, with recycled black liquor diluted slurry concentration to 3% or so, then Slurry is sifted out into impurity, slurry carries out pulp washing by wash engine after sieve；It is described to wash the control of disposed slurry residual alkali in below 0.2g/l；Slurry Alkali collection is sent in the black liquor part gone out after washing, partly into circulation diluted slurry in system and rotary spherical digester cooling.
- A kind of 5. preparation technology of true qualities poplar slurry according to claim 3, it is characterised in that：The preparation technology also wraps Include boiling step；The boiling step：By poplar section transport to conveying worm, added in conveying worm and match somebody with somebody most intimate friend Alkali lye and digesting assistant；After poplar section is mixed in conveying worm with alkali lye and digesting assistant, by material after mixing Load rotary spherical digester and carry out boiling；The temperature of alkali lye is 80~100 DEG C in the addition conveying worm；Poplar is cut into slices in the rotary spherical digester Pitching amount be 8.5~9.0t/ balls；The dosage of the digesting assistant is 7~8kg/ balls.
- A kind of 6. preparation technology of true qualities poplar slurry according to claim 3, it is characterised in that：The digestant is new Anthraquinone, the mesh of novel anthraquinone fineness 100, moisture content≤0.2%, free quinone >=45%, effective active thing >=53.5%, insoluble matter ≤ 0.5%.
- A kind of 7. preparation technology of true qualities poplar slurry according to claim 3, it is characterised in that：The preparation technology also wraps Include heating step；In the heating step, after filling ball, rotary spherical digester rotates 5~20min after rotary spherical digester is covered.
- A kind of 8. preparation technology of true qualities poplar slurry according to claim 7, it is characterised in that：The heating-up time control In more than 50min, temperature in rotary spherical digester is slowly raised 165~175 DEG C.
- A kind of 9. preparation technology of true qualities poplar slurry according to claim 7, it is characterised in that：Among the temperature-rise period Once small steam bleeding；The small steam bleeding time is 5~10min；Rotary spherical digester pressure is 0.3~0.6MPa after the small steam bleeding；It is described small Rotary spherical digester temperature is 140~160 DEG C after steam bleeding.
- A kind of 10. preparation technology of true qualities poplar slurry according to claim 3, it is characterised in that：The technique also includes Manufacture paper with pulp step；The step of manufacturing paper with pulp includes pulp storage tank, wet end, press section, drying section, cuts reason paper machine, packing process of weighing；It is described Dense pulp storage tank slurry is 2.5~3%；The wet end online concentration is 1.2~1.5%, goes out wet end slurry page mass dryness fraction ＞ 20%；The squeezing Portion includes a nip, two nips, three nips；One nip pressure is 3.5~4.5kg, two nip pressure is 4.5~ 5.5kg；Three nip pressure is 5.5~6.5kg；Go out three nips slurry page mass dryness fraction ＞ 58%；The drying section, enter drying cylinder air pressure ≤0.4MPa；It is 10 ± 1.5 ﹪, quantification of 700 ± 100g/ ㎡ to go out drying section slurry page moisture.
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