CN101831822A - Method for producing paper pulp by adopting cotton stalk peel as raw material - Google Patents
Method for producing paper pulp by adopting cotton stalk peel as raw material Download PDFInfo
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- CN101831822A CN101831822A CN 201010178303 CN201010178303A CN101831822A CN 101831822 A CN101831822 A CN 101831822A CN 201010178303 CN201010178303 CN 201010178303 CN 201010178303 A CN201010178303 A CN 201010178303A CN 101831822 A CN101831822 A CN 101831822A
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Abstract
The invention relates to a method for producing paper pulp by adopting cotton stalk peel as raw material, which adopts an enzyme-ammonium sulfite method. The enzyme-ammonium sulfite method comprises the steps of: firstly, removing pectin of the cotton stalk peel and degrading lignin by using degumming enzyme and then, preparing coarse pulp by an ammonium sulfite boiling step, and finally processing the coarse pulp by a conventional production method to obtain finished product pulp, wherein the degumming enzyme is prepared by compounding pectinase, laccase and lignin enzyme in the weight ratio of 1-3:1:1, and a degumming enzym solution is prepared by compounding the degumming enzyme, urea and water in the weight ratio of 5:5:1000-15:15:1000; the cotton stalk peel is soaked in the sealed degumming enzyme solution for 24-48 hours in the static state at the temperature of 20-30 DEG C. The weight ratio of the ammonium sulfite to the oven dry cotton stalk peel in a boiling solution is 10-13 percent, and the pH value of the boiling solution is 7-9. In the invention, the pectinase is added in the degumming enzyme, which effectively remove pectic substances and solves the problem that subsequent processing is influenced by the existence of the pectin and industrialized production can not be realized. The invention can produce the paper pulp meeting standards. Compared with the traditional chemical pulp producing method, the invention has the advantages of high pulp yield, energy saving, cost reduction and recycled black liquor.
Description
Technical field
The present invention relates to a kind of production method of paper pulp, particularly a kind of is that raw material adopts enzyme-Ammonium Sulfite Method to produce the method for paper pulp with the bast fiber.
Background technology
For a long time, the raw material problem seriously restricts the development of pulp and paper industry always.The raw material wretched insufficiency, and grass as raw material is many, and wood raw material is few.The wretched insufficiency of wood supply causes paper industry to struggle hard decades on the road based on grass, is in very passive situation.Develop new raw material is the difficult problem that those skilled in the art are exploring always.Cotton stalk is the raw material of researching and developing.The Cotton in China cultivated area has more than 8,000 ten thousand mu, and its middle cotton stalk skin year, biological total amount reached about 4,000,000 tons, about 1,200 ten thousand tons in cotton stalk core, and the source is abundant.Cotton stalk skin contains holocellulose 62.78%, the general length 1.40-3.50mm of cotton stalk hide fiber, and general width 0.0157-0.0229mm, length-width ratio 113: 1 is a good raw material of making strong pulp.But the treatment technology of cotton stalk does not obtain effective breakthrough, fails to realize industrial applications.
Chinese patent 200710034304.X " cotton stalk skin-core mechanical separation method and special equipment " has successfully solved cotton stalk skin-core and has separated a difficult problem, for modern industry provides cotton stalk skin (bast fiber) and cotton stalk core (wood fibre) two kinds of different fibrous materials.This patent utilization mechanically rolling, strike and dialling physical means such as hits when separating cotton stalk skin-core, can remove the cuticula on most of cotton stalk skin surface effectively, the not cellulose that cuticula is made up of wax, pectin and protein, has hydrophobicity, except that the burden that can alleviate subsequent treatment behind the destratum corneum greatly.
Because the chemical constituent and the fibre morphology difference thereof of cotton stalk skin and cotton stalk core are big, cotton stalk skin contains pectin more than 7%, lignin about 18%, and the cotton stalk core contains pectin hardly, the two can not adopt the processing that uses the same method.Just do not handle directly pulping by cooking if cotton stalk skin comes unstuck earlier, when slurrying, not only consume a large amount of medicines, increase cost, add heavily contaminated, and produce a large amount of foams more, make the washing difficulty owing to pectic substance.For lignin; one of its function in plant is exactly that the protective plant cell is not corroded by external microbe; this specific character has determined lignin not decomposed by most of microbe, but can progressively decompose lignin by the laccase and the lignoenzyme of whiterot fungi secretion.Chinese patent application CN101139804A discloses a kind of method of utilizing biology enzyme to produce environment-friendly paper pulp, it utilizes above-mentioned principle, after pulping raw material process segment or slicing treatment, the laccase and the lignoenzyme that in the raw material soaking pond, add the degradable lignin, reduce the lignin molecule quality, increase the stripping of lignin and by the ability of extracting, the realization lignin separates with cellulose and hemicellulose, and take machinery to rub mill with the hands and divide silk, defibrination, the spiral shove, fiber is discongested, refining is regulated, methods such as meticulous screening, it is low that its purpose is to realize that paper pulp is produced cost, good slurry concentration height, non-pollution discharge.But this patent has just been considered the processing of lignin in the plant material, do not relate to the processing of pectin, plant material to different components such as forage, timber, fiber crops, cotton stalks adopts same technical scheme to handle, promptly all adopt laccase and lignoenzyme its lignin of degrading, and other compositions are not handled, in fact, handle in the process of different strings in actual production, can cause and effect other impurity such as glue existence and can't reach its described effect.
The applicant in first to file Chinese patent 200910042847.5, this patent application discloses a kind ofly to be adopted the cotton stalk core or spreads out the method that the waste of flax core is produced paper pulp.It is with the cotton stalk core after core-skin separates or to spread out the waste of flax core be raw material, adopts enzyme-Ammonium Sulfite Method production.Enzyme-Ammonium Sulfite Method production comprises softening step of fermentation and slurrying step.The softening step of fermentation is: with the cotton stalk core or spread out the waste of flax core and be immersed in the catalytic decomposition agent solution, the catalytic decomposition agent is a compound biological enzyme, and compound biological enzyme comprises laccase and lignoenzyme.This invention can directly be immersed in the broken bar core that separates through the cotton stalk skin-core seperator in the catalytic decomposition agent solution, lignin degrading, and softening fibre need not to be provided with the raw material pulverizing operation.In like manner, this patent has also just been considered the processing of lignin in the plant material, does not relate to the processing of pectin, equally also can't directly apply in the slurrying of cotton stalk bark.
On the other hand, some common practise are disclosed in the prior art, as 1, the selectivity of catalytic reaction is one of most important characteristic of enzyme, be that a kind of enzyme can only carry out certain type catalytic reaction at substrate a kind of or that a class formation is similar, as above-mentioned patent application mention can only lignin degrading with laccase and lignoenzyme, can not catalytic degradation pectin.2, enzyme is from organism, and the catalytic reaction of general enzyme is non-extreme condition, except that indivedual enzymes, all needs to react under normal temperature and pressure conditions.3, enzyme is a macromolecular substances, and its volume is generally big thousands of times than hydrone.The active site of enzyme is the very fraction of enzyme molecule, is to combine with substrate in the enzyme molecule and the basis of catalytic reaction.Only make the active site of enzyme molecule fully contact, agree with, just can play catalytic reaction with substrate.
Based on above-mentioned common practise, there is following problem in the technical scheme of Chinese patent application CN101139804A:
1, only depending on directly long-time continuously logical steam is 80-90 ℃ with the temperature of control fermented by biological enzyme liquid, biology enzyme is in the 80-90 ℃ of solution for a long time, unavoidable meeting inactivation, and the mode of this directly logical steam is difficult to effectively control liquid temperature in actual industrial production, liquor ratio changes greatly, the course of reaction instability.
2, this technical scheme is a fermentative degradation lignin in open-top receptacle, illustrate that its degradation process carries out under aerobic condition, and under aerobic condition, even added promoter such as urea, its aminating reaction can't carry out also.
3, do not add any promoter, in suitability for industrialized production, can't reach and the effective effect that combines of substrate.
4, the compound method of unexposed fermented by biological enzyme liquid, and in fact the compound method of fermented by biological enzyme liquid is very big to the degradation effect influence, also can adopt the diverse ways preparation usually because of the difference of biology enzyme, does not have operability in suitability for industrialized production.
In sum, string pulping process of the prior art can't directly apply in the cotton stalk bark slurrying, needs further to study at the characteristic of cotton stalk bark.
Summary of the invention
The object of the present invention is to provide that a kind of to adopt cotton stalk skin be the method for raw material production paper pulp, it can produce standard compliant paper pulp, with traditional chemical pulp-making method ratio, has the slurry yield height, energy savings, reduce cost, the advantage of the recyclable utilization of black liquor.
Technical scheme of the present invention is: a kind of to adopt cotton stalk skin be the method for raw material production paper pulp, it adopts cotton stalk skin is raw material, described cotton stalk skin adopts enzyme-Ammonium Sulfite Method to make paper pulp, described enzyme-Ammonium Sulfite Method be earlier cotton stalk skin is adopted that degummase removes pectin, behind its lignin of degrading, make thick slurry through imonium boiling step again, slightly starching routinely, production method processing obtains the finished product slurry.
As to further improvement of the present invention, the degummase that described degummase comes unstuck in the step is 1 by pectase and laccase, lignoenzyme by weight: 1-3: 1 is formulated, degummase solution be by degummase and urea and water by 5: 5: 1000-15: part by weight was formulated in 15: 1000, water temperature is 20-30 ℃, and the described degummase step of coming unstuck is that the cotton stalk skin of short-movie is immersed in the degummase solution under sealing and the static condition 24-48 hour.
As to further improvement of the present invention, described imonium boiling treatment step is: will the cotton stalk leather jacket after degummase comes unstuck go into digesting apparatus and carry out boiling, ammonium sulfite is 10-13% to the weight ratio of the cotton stalk skin of over dry in the cooking liquor, and the pH value of cooking liquor is adjusted into 7-9 by adding soda ash.
As to further improvement of the present invention, described cotton stalk skin is removed the cuticula on cotton stalk skin surface with conventional physical method earlier, and described cotton stalk skin is broken into earlier the short-movie that length is 3-10cm, adopts enzyme-Ammonium Sulfite Method to carry out follow-up slurrying again.
As to further improvement of the present invention, the cotton stalk skin in the described imonium boiling treatment step after degummase comes unstuck is to carry out boiling with reinstalling digesting apparatus after hot water embathes more than 80 ℃ earlier.
As to further improvement of the present invention, the cooking liquor in the described imonium boiling step is added with magnesia, and the weight ratio of the cotton stalk skin of described magnesia and over dry is 0.5-2%.
As to further improvement of the present invention, described cooking pressure is 0.90-1.05MPa, and boiling temperature is 170-180 ℃, and total cooking time is 15-20min.
As to further improvement of the present invention, the described thick slurry production method processing production stage that obtains the finished product slurry routinely is: thick slurry becomes screened stock through defibrator process, screened stock through spurt, screening, centrifugation, shove, purification concentrate, discongest, neat and well spaced after, obtain the finished product slurry.
As to further improvement of the present invention, described boiling is for carrying out mode continuously, and described digesting apparatus is the inclined tube continuous steamer.
As to further improvement of the present invention, described cotton stalk skin is broken into the step of the cotton stalk skin of short-movie and is finished by the roller stretch-breaking device.
The principle that the present invention adopts enzyme to come unstuck is:
Degummase of the present invention comprises pectase and laccase, lignoenzyme, pectase is the aggregate of protopectinase, lipase, hydrolase and lyases, various enzymes can be brought into play different effects: but the insoluble protopectin of protopectinase catalysis decomposites free water dissolubility pectic substance; The formicester group that lipase can be removed in the water soluble pectin matter generates pectic acid; Pectic acid is hydrolyzed enzyme hydrolysis and becomes products such as galacturonic acid; Lyases cleavable pectic acid is unsaturated galacturonic acid and oligogalacturonans, so the capable of being fast degraded and molten pectic substance that removes of pectase.
Laccase is identical with the lignoenzyme effect, all is to be used for lignin degrading, makes the C of lignin
α-C
βBond fission, C
β-C
rBond fission, the bond fission of B-aryl oxide, aromatic oxygenation cracking, C
3-C
5Demethoxylation and C
4Reaction such as more than methylate.Lignin is degraded into low molecular mass lignin through the catalysis of enzyme, improved the ability of the stripping and the extraction of lignin, thereby realizes separating of lignin and cellulose and hemicellulose.
Beneficial effect of the present invention is:
1, raw material cotton stalk bark of the present invention is in the core-skin separation process, through mechanically rolling, strike and dial physical means such as hit and handle after, dispose the not cellulose formed by wax, pectin and protein on cotton stalk skin surface effectively, have hydrophobic cuticula, thereby alleviated the burden of removal of impurities in the subsequent process steps greatly, the total amount of pollutant has been reduced more than 45%.Can save raw material and cut off and the selection by winnowing operation, directly the cotton stalk skin that mechanical separation is come out carries out following process.Cotton stalk skin after core-skin separates also can adopt physical method to break by machineries such as roller stretch-breaking devices again, makes damaged cotton stalk cornu cutaneum materialization top layer obtain further removing completely, simultaneously cotton stalk skin is broken into short-movie, can help enzyme and come unstuck and the imonium boiling.
2, the present invention overcome only only adopted in the prior art biological fermentation process can lignin degrading laccase and the limitation of lignoenzyme, increased pectase, can degrade lignin in the cotton stalk bark, more can remove pectic substance, solve the existence of cause and effect glue and influence following process, can't realize the problem of industrialized production.
The present invention has added urea as promoter in degummase solution, urea is the organic compound that hygroscopicity is strong, hydration capability is big, it can make solution the moistening and fento gap enlargement that is full of, play infiltration and swelling action, help big molecule complex enzyme deeply inner, promote enzyme-to-substrate approaching, agree with, accelerate the biodegradation of pectin and lignin, soften, swelling and branch loose wool stalk hide fiber.And under anoxia condition, carry out the biological enzyme degumming step, for urea and cotton stalk skin generation aminating reaction, further create conditions, also created good condition for next step boiling for the dissolving that promotes pectin and the degraded of lignin.Degummase liquid can repeatedly reclaim use, accomplishes pollution-free substantially.
According to degummase in the characteristic that shows higher vigor between the normal temperature to 60 ℃, the present invention determines that degummase liquid initial temperature is 20-30 ℃, the factor that consideration has nature to heat up in the process of coming unstuck, its maximum temperature can not make degummase liquid influence its activity above 60 ℃ yet.
3, the selected imonium cooking process of the present invention, the cooking liquor that the neutral ammonium sulfite that is easy to get by raw material is mixed with, and the pH value of control cooking liquor is 7-9, the cooking waste liquor that is produced can be made chemical fertilizer, solves problem of environmental pollution.
As adopt the inclined tube continuous steamer to carry out continuously cooking for the imonium digesting apparatus, in its digestion process, the inclined tube lower part is full of cooking liquor, top is steam, carry out liquid phase cooking earlier from the material of bottom feeding inclined tube, carry out vapor phase pulping then, realized that liquid phase cooking and vapor phase pulping strictness distinguish, the slurry of boiling is even, and quality is good.Total digestion time was controlled in 20 minutes, and its operating cost is few, can reduce by 0.5 ton/ton of steam than rotary spherical digester boiling, and technological parameter is stable in producing, the automaticity height.
4, do not comprise cellulase and hemicellulase in the degumming baths of the present invention; in the process of coming unstuck; cellulose and hemicellulose are gone up substantially and are saved from damage; and in cooking liquor, add magnesia as buffer; can protect cellulose and hemicellulose in digestion process, also can continue to be saved from damage; having saved cellulose and hemicellulose from damage can make paper pulp yield further improve; also can play the effect that promotes cooking effect; the paper pulp yield that the present invention produced can reach about 60%, and is higher more than 10% than sulfate process.
5, continuously cooking helps fiber dispersion after defibrator is worn into screened stock spurts again, can save time, and the black liquor that the washing back proposes can be stored in the black liquor groove, and redundance also is directly used in agricultural fertilising, helps environmental protection and energy-conservation.The plain boiled water that screening is discharged after treatment, plain boiled water all can be back to production.
The present invention has realized producing high-yield pulp with cotton stalk skin, can replace wood pulp papermaking fully, has promptly saved the energy and has reduced cost again; The recyclable utilization of black liquor or be used for farmland fertilization for paper industry provides new raw material, new technology, has good economic benefit, social benefit and ecological environment benefit.
The specific embodiment
Embodiment 1:
It is a kind of that to adopt cotton stalk skin be the method for raw material production paper pulp, it adopts cotton stalk skin is raw material, cotton stalk skin is that to have carried out cotton stalk skin-core by Chinese patent 200710034304.X " cotton stalk skin-core mechanical separation method and special equipment " separating obtained, the cotton stalk skin of gained has been removed surperficial cuticula substantially in separation process, degree of purity reaches about 90%, break into the short-movie that length is 3-10cm by the roller stretch-breaking device again, obtain further disengaging at this process mesocuticle, adopted enzyme-Ammonium Sulfite Method to carry out follow-up slurrying then.Enzyme-Ammonium Sulfite Method be earlier cotton stalk skin is adopted that biology enzyme removes pectin, behind its lignin of degrading, make thick slurry through imonium boiling step again, slightly starching routinely, production method processing obtains the finished product slurry, slightly starching the production stage that the processing of production method routinely obtains the finished product slurry is: thick slurry becomes screened stock through defibrator process, screened stock through spurt, screening, centrifugation, shove, purification concentrate, discongest, neat and well spaced after, obtain the finished product slurry.
Concrete slurrying production stage is:
1. enzyme comes unstuck: the cotton stalk skin of length at 3-10cm is placed in the pond of coming unstuck, and earlier the mixture with commodity pectase and commodity laccase, lignoenzyme is mixed with degummase by weight at 1: 1; Again degummase and urea and water are mixed with the solution that comes unstuck by 5: 5: 1000 part by weight, the temperature of water is 20 ℃, pours into then in the pond, and the very useful Polypropylence Sheet in pond is built and sealed, and leaves standstill 48 hours.Cotton stalk skin in degumming baths with enzyme and the shared effect of urea under spontaneous fermentation, temperature can reach 40-60 ℃, the destroyed and dissolving of the soluble substance in the cotton stalk skin and most of pectin, lignin begins degraded, the easy molten lignin of part is also destroyed and dissolve.The fiber swelling is softening, and initial gross separation is loose, drains degumming baths, embathes cotton stalk skin, inactivator bacterium with hot water more than 80 ℃.Wash stripping simultaneously but still inhale the colloid that (gluing) is attached to cotton stalk skin surface.
2. imonium boiling: the cotton stalk leather jacket behind the inactivator bacterium is gone into the inclined tube continuous steamer carry out boiling, its cooking schedule is: ammonium sulfite percentage by weight 10% (to the cotton stalk skin of over dry), magnesia percentage by weight 0.5% (to the cotton stalk skin of over dry), the soda ash percentage by weight is adjusted into 7 with the PH with cooking liquor and is as the criterion, 170 ℃ of boiling temperatures, cooking pressure 0.90MPa, digestion time 20min.
3, defibrator process is spurted: the thick slurry of the cotton stalk skin that obtains behind the continuously cooking is roughly ground into screened stock through defibrator, keeps higher temperature and pressure during defibrination, spurts behind the defibrination to enter spraying pot.
4. pulp washing: adopt three sections acroll press washer filtering stocks, black liquor stores in the black liquor groove after proposing.
5. screening: the one-level vibrating screen, secondary screen centrifuge, the screenings that the secondary sieve is discharged reclaim and purify the fiber in the screening reject again by vibrating screen and desander, the plain boiled water that screening is discharged, after treatment, fiber and plain boiled water all are back to production.
6. concentrate making beating: with gravity type decker thickening-purification technology slurry, discongest again through jordan and to grind neat and well spaced slurry through double plate, the finished product slurry, yield reaches about 60%.
Embodiment 2:
It is a kind of that to adopt cotton stalk skin be the method for raw material production paper pulp, it adopts cotton stalk skin is raw material, cotton stalk skin is that to have carried out cotton stalk skin-core by Chinese patent 200710034304.X " cotton stalk skin-core mechanical separation method and special equipment " separating obtained, the cotton stalk skin of gained has been removed surperficial cuticula substantially in separation process, degree of purity reaches about 90%, break into the short-movie that length is 3-10cm by the roller stretch-breaking device again, obtain further disengaging at this process mesocuticle, adopted enzyme-Ammonium Sulfite Method to carry out follow-up slurrying then.Enzyme-Ammonium Sulfite Method be earlier cotton stalk skin is adopted that biology enzyme removes pectin, behind its lignin of degrading, make thick slurry through imonium boiling step again, slightly starching routinely, production method processing obtains the finished product slurry, slightly starching the production stage that the processing of production method routinely obtains the finished product slurry is: thick slurry becomes screened stock through defibrator process, screened stock through spurt, screening, centrifugation, shove, purification concentrate, discongest, neat and well spaced after, obtain the finished product slurry.
1. enzyme comes unstuck: the cotton stalk skin of length at 3-10cm is placed in the pond of coming unstuck, earlier the mixture of commodity pectase and commodity laccase, lignoenzyme is mixed with degummase by weight at 2: 1; Again degummase and urea and water are mixed with the solution that comes unstuck by 10: 10: 1000 part by weight, the temperature of water is 26 ℃, pours into then in the pond, and the very useful Polypropylence Sheet in pond is built and sealed, static 36 hours.Cotton stalk skin in degumming baths with enzyme and the shared effect of urea under spontaneous fermentation, temperature can reach 40-60 ℃, the destroyed and dissolving of the soluble substance in the cotton stalk skin and most of pectin, lignin begins degraded, the easy molten lignin of part is also destroyed and dissolve.The fiber swelling is softening, and initial gross separation is loose, drains degumming baths, embathes cotton stalk skin, inactivator bacterium with hot water more than 80 ℃.Wash stripping simultaneously but still inhale the colloid that (gluing) is attached to cotton stalk skin surface.
2. imonium boiling: the cotton stalk leather jacket of inactivator bacterium is gone into the inclined tube continuous steamer carry out boiling, its cooking schedule is: ammonium sulfite percentage by weight 11% (to the cotton stalk skin of over dry), magnesia percentage by weight 0.8 (to the cotton stalk skin of over dry), the soda ash percentage by weight is adjusted into 8 with the pH value of cooking liquor and is as the criterion, 172 ℃ of boiling temperatures, cooking pressure 0.93MPa, digestion time 18min.
3, defibrator process is spurted: the thick slurry of the cotton stalk skin that obtains behind the continuously cooking is roughly ground into screened stock through defibrator, keeps higher temperature and pressure during defibrination, spurts behind the defibrination to enter spraying pot.
4. pulp washing: adopt three sections acroll press washer filtering stocks, black liquor stores in the black liquor groove after proposing.
5. screening: the one-level vibrating screen, secondary screen centrifuge, the screenings that the secondary sieve is discharged reclaim and purify the fiber in the screening reject again by vibrating screen and desander, the plain boiled water that screening is discharged, after treatment, fiber and plain boiled water all are back to production.
6. concentrate making beating: with gravity type decker thickening-purification technology slurry, discongest again through jordan and to grind neat and well spaced slurry through double plate, the finished product slurry, yield reaches about 60%.
Embodiment 3:
It is a kind of that to adopt cotton stalk skin be the method for raw material production paper pulp, it adopts cotton stalk skin is raw material, cotton stalk skin is that to have carried out cotton stalk skin-core by Chinese patent 200710034304.X " cotton stalk skin-core mechanical separation method and special equipment " separating obtained, the cotton stalk skin of gained has been removed surperficial cuticula substantially in separation process, degree of purity reaches about 90%, break into the short-movie that length is 3-10cm by the roller stretch-breaking device again, obtain further disengaging at this process mesocuticle, adopted enzyme-Ammonium Sulfite Method to carry out follow-up slurrying then.Enzyme-Ammonium Sulfite Method be earlier cotton stalk skin is adopted that biology enzyme removes pectin, behind its lignin of degrading, make thick slurry through imonium boiling step again, slightly starching routinely, production method processing obtains the finished product slurry, slightly starching the production stage that the processing of production method routinely obtains the finished product slurry is: thick slurry becomes screened stock through defibrator process, screened stock through spurt, screening, centrifugation, shove, purification concentrate, discongest, neat and well spaced after, obtain the finished product slurry.
1. enzyme comes unstuck: the cotton stalk skin of length at 3-10cm is placed in the pond of coming unstuck, earlier the mixture of commodity pectase and laccase, lignoenzyme is mixed with degummase by weight at 3: 1; Again degummase and urea and water are mixed with the solution that comes unstuck by 15: 15: 1000 part by weight, the temperature of water is 30 ℃, pours into then in the pond, and the very useful Polypropylence Sheet in pond is built and sealed, static 24 hours.Cotton stalk skin in degumming baths with enzyme and the shared effect of urea under spontaneous fermentation, temperature can reach 40-60 ℃, the destroyed and dissolving of the soluble substance in the cotton stalk skin and most of pectin, lignin begins degraded, the easy molten lignin of part is also destroyed and dissolve.The fiber swelling is softening, and initial gross separation is loose, drains degumming baths and embathes cotton stalk skin, inactivator bacterium with hot water more than 80 ℃.Wash stripping simultaneously but still inhale the colloid that (gluing) is attached to cotton stalk skin surface.
2. imonium boiling: the cotton stalk leather jacket of inactivator bacterium is gone into the inclined tube continuous steamer carry out boiling, its cooking schedule is: ammonium sulfite percentage by weight 13% (to the cotton stalk skin of over dry), magnesia percentage by weight 2% (to the cotton stalk skin of over dry), the soda ash percentage by weight is adjusted into 9 with the pH value of cooking liquor and is as the criterion, 180 ℃ of boiling temperatures, cooking pressure 1.05MPa, digestion time 15min.
3, defibrator process is spurted: the thick slurry of the cotton stalk bark that obtains behind the continuously cooking is roughly ground into screened stock through defibrator, keeps higher temperature and pressure during defibrination, spurts behind the defibrination to enter spraying pot.
4. pulp washing: adopt three sections acroll press washer filtering stocks, black liquor stores in the black liquor groove after proposing.
5. screening: the one-level vibrating screen, secondary screen centrifuge, the screenings that the secondary sieve is discharged reclaim and purify the fiber in the screening reject again by vibrating screen and desander, the plain boiled water that screening is discharged, after treatment, fiber and plain boiled water all are back to production.
6. concentrate making beating: with gravity type decker thickening-purification technology slurry, discongest again through jordan and to grind neat and well spaced slurry through double plate, the finished product slurry, yield reaches about 60%.
Embodiment 4
It is a kind of that to adopt cotton stalk skin be the method for raw material production paper pulp, it adopts cotton stalk skin is raw material, cotton stalk skin is that to have carried out cotton stalk skin-core by Chinese patent 200710034304.X " cotton stalk skin-core mechanical separation method and special equipment " separating obtained, the cotton stalk skin of gained has been removed surperficial cuticula substantially in separation process, degree of purity reaches about 90%, break into the short-movie that length is 3-10cm by the roller stretch-breaking device again, obtain further disengaging at this process mesocuticle, adopted enzyme-Ammonium Sulfite Method to carry out follow-up slurrying then.Enzyme-Ammonium Sulfite Method be earlier cotton stalk skin is adopted that biology enzyme removes pectin, behind its lignin of degrading, make thick slurry through imonium boiling step again, slightly starching routinely, production method processing obtains the finished product slurry, slightly starching the production stage that the processing of production method routinely obtains the finished product slurry is: thick slurry becomes screened stock through defibrator process, screened stock through spurt, screening, centrifugation, shove, purification concentrate, discongest, neat and well spaced after, obtain the finished product slurry.
1. enzyme comes unstuck: the cotton stalk skin of length at 3-10cm is placed in the pond of coming unstuck, earlier the mixture of commodity pectase and commodity laccase, lignoenzyme is mixed with degummase by weight at 1: 1; Again degummase and urea and water are mixed with the solution that comes unstuck by 5: 5: 1000 part by weight, the temperature of water is 28 ℃, pours into then in the pond, and the very useful Polypropylence Sheet in pond is built and sealed, static 48 hours.Cotton stalk skin in degumming baths with enzyme and the shared effect of urea under spontaneous fermentation, temperature can reach 40-60 ℃, the destroyed and dissolving of the soluble substance in the cotton stalk skin and most of pectin, lignin begins degraded, the easy molten lignin of part is also destroyed and dissolve.The fiber swelling is softening, and initial gross separation is loose, drains degumming baths and embathes cotton stalk skin, inactivator bacterium with hot water more than 80 ℃.Wash stripping simultaneously but still inhale the colloid that (gluing) is attached to cotton stalk skin surface.
2. imonium boiling: the cotton stalk leather jacket of inactivator bacterium is gone into the inclined tube continuous steamer carry out boiling, its cooking schedule is: ammonium sulfite percentage by weight 12% (to the cotton stalk skin of over dry), magnesia percentage by weight 1.7% (to the cotton stalk skin of over dry), the soda ash percentage by weight is adjusted into 9 with the pH value of cooking liquor and is as the criterion, 178 ℃ of boiling temperatures, cooking pressure 1.02MPa, digestion time 17min.
3, defibrator process is spurted: the thick slurry of the cotton stalk bark that obtains behind the continuously cooking is roughly ground into screened stock through defibrator, keeps higher temperature and pressure during defibrination, spurts behind the defibrination to enter spraying pot.
4. pulp washing: adopt three sections acroll press washer filtering stocks, black liquor stores in the black liquor groove after proposing.
5. screening: the one-level vibrating screen, secondary screen centrifuge, the screenings that the secondary sieve is discharged reclaim and purify the fiber in the screening reject again by vibrating screen and desander, the plain boiled water that screening is discharged, after treatment, fiber and plain boiled water all are back to production.
6. concentrate making beating: with gravity type decker thickening-purification technology slurry, discongest again through jordan and to grind neat and well spaced slurry through double plate, the finished product slurry, yield reaches about 60%.
Embodiment 5
It is a kind of that to adopt cotton stalk skin be the method for raw material production paper pulp, it adopts cotton stalk skin is raw material, cotton stalk skin is that to have carried out cotton stalk skin-core by Chinese patent 200710034304.X " cotton stalk skin-core mechanical separation method and special equipment " separating obtained, the cotton stalk skin of gained has been removed surperficial cuticula substantially in separation process, degree of purity reaches about 90%, break into the short-movie that length is 3-10cm by the roller stretch-breaking device again, obtain further disengaging at this process mesocuticle, adopted enzyme-Ammonium Sulfite Method to carry out follow-up slurrying then.Enzyme-Ammonium Sulfite Method be earlier cotton stalk skin is adopted that biology enzyme removes pectin, behind its lignin of degrading, make thick slurry through imonium boiling step again, slightly starching routinely, production method processing obtains the finished product slurry, slightly starching the production stage that the processing of production method routinely obtains the finished product slurry is: thick slurry becomes screened stock through defibrator process, screened stock through spurt, screening, centrifugation, shove, purification concentrate, discongest, neat and well spaced after, obtain the finished product slurry.
1. enzyme comes unstuck: the cotton stalk skin of length at 3-10cm is placed in the pond of coming unstuck, earlier the mixture of commodity pectase and commodity laccase, lignoenzyme is mixed with degummase by weight at 2: 1; Again degummase and urea and water are mixed with the solution that comes unstuck by 10: 10: 1000 part by weight, the temperature of water is 24 ℃, pours into then in the pond, and the very useful Polypropylence Sheet in pond is built and sealed, static 36 hours.Cotton stalk skin in degumming baths with enzyme and the shared effect of urea under spontaneous fermentation, temperature can reach 40-60 ℃, the destroyed and dissolving of the soluble substance in the cotton stalk skin and most of pectin, lignin begins degraded, the easy molten lignin of part is also destroyed and dissolve.The fiber swelling is softening, and initial gross separation is loose, drains degumming baths, embathes cotton stalk skin, inactivator bacterium with hot water more than 80 ℃.Wash stripping simultaneously but still inhale the colloid that (gluing) is attached to cotton stalk skin surface.
2. imonium boiling: the cotton stalk leather jacket of inactivator bacterium is gone into the inclined tube continuous steamer carry out boiling, its cooking schedule is: ammonium sulfite percentage by weight 13% (to the cotton stalk skin of over dry), magnesia percentage by weight 1.4% (to the cotton stalk skin of over dry), the soda ash percentage by weight is adjusted into 9 with the pH value of cooking liquor and is as the criterion, 176 ℃ of boiling temperatures, cooking pressure 0.99MPa, digestion time 18min.
3, defibrator process is spurted: the thick slurry of the cotton stalk bark that obtains behind the continuously cooking is roughly ground into screened stock through defibrator, keeps higher temperature and pressure during defibrination, spurts behind the defibrination to enter spraying pot.
4. pulp washing: adopt three sections acroll press washer filtering stocks, black liquor stores in the black liquor groove after proposing.
5. screening: the one-level vibrating screen, secondary screen centrifuge, the screenings that the secondary sieve is discharged reclaim and purify the fiber in the screening reject again by vibrating screen and desander, the plain boiled water that screening is discharged, after treatment, fiber and plain boiled water all are back to production.
6. concentrate making beating: with gravity type decker thickening-purification technology slurry, discongest again through jordan and to grind neat and well spaced slurry through double plate, the finished product slurry, yield reaches about 60%.
Embodiment 6
It is a kind of that to adopt cotton stalk skin be the method for raw material production paper pulp, it adopts cotton stalk skin is raw material, cotton stalk skin is that to have carried out cotton stalk skin-core by Chinese patent 200710034304.X " cotton stalk skin-core mechanical separation method and special equipment " separating obtained, the cotton stalk skin of gained has been removed surperficial cuticula substantially in separation process, degree of purity reaches about 90%, break into the short-movie that length is 3-10cm by the roller stretch-breaking device again, obtain further disengaging at this process mesocuticle, adopted enzyme-Ammonium Sulfite Method to carry out follow-up slurrying then.Enzyme-Ammonium Sulfite Method be earlier cotton stalk skin is adopted that biology enzyme removes pectin, behind its lignin of degrading, make thick slurry through imonium boiling step again, slightly starching routinely, production method processing obtains the finished product slurry, slightly starching the production stage that the processing of production method routinely obtains the finished product slurry is: thick slurry becomes screened stock through defibrator process, screened stock through spurt, screening, centrifugation, shove, purification concentrate, discongest, neat and well spaced after, obtain the finished product slurry.
1. enzyme comes unstuck: the cotton stalk skin of length at 3-10cm is placed in the pond of coming unstuck, earlier the mixture of commodity pectase and commodity laccase, lignoenzyme is mixed with degummase by weight at 3: 1; Again degummase and urea and water are mixed with the solution that comes unstuck by 15: 15: 1000 part by weight, the temperature of water is 22 ℃, pours into then in the pond, and the very useful Polypropylence Sheet in pond is built and sealed, static 24 hours.Cotton stalk skin in degumming baths with enzyme and the shared effect of urea under spontaneous fermentation, temperature can reach 40-60 ℃, the destroyed and dissolving of the soluble substance in the cotton stalk skin and most of pectin, lignin begins degraded, the easy molten lignin of part is also destroyed and dissolve.The fiber swelling is softening, and initial gross separation is loose, drains degumming baths and embathes cotton stalk skin, inactivator bacterium with hot water more than 80 ℃.Wash stripping simultaneously but still inhale the colloid that (gluing) is attached to cotton stalk skin surface.
2. imonium boiling: the cotton stalk leather jacket of inactivator bacterium is gone into the inclined tube continuous steamer carry out boiling, its cooking schedule is: ammonium sulfite percentage by weight 10% (to the cotton stalk skin of over dry), magnesia percentage by weight 1.1% (to the cotton stalk skin of over dry), the soda ash percentage by weight is adjusted into 7 with the pH value of cooking liquor and is as the criterion, 174 ℃ of boiling temperatures, cooking pressure 0.96MPa, digestion time 19min.
3, defibrator process is spurted: the thick slurry of the cotton stalk bark that obtains behind the continuously cooking is roughly ground into screened stock through defibrator, keeps higher temperature and pressure during defibrination, spurts behind the defibrination to enter spraying pot.
4. pulp washing: adopt three sections acroll press washer filtering stocks, black liquor stores in the black liquor groove after proposing.
5. screening: the one-level vibrating screen, secondary screen centrifuge, the screenings that the secondary sieve is discharged reclaim and purify the fiber in the screening reject again by vibrating screen and desander, the plain boiled water that screening is discharged, after treatment, fiber and plain boiled water all are back to production.
6. concentrate making beating: with gravity type decker thickening-purification technology slurry, discongest again through jordan and to grind neat and well spaced slurry through double plate, the finished product slurry, yield reaches about 60%.
Claims (10)
- One kind to adopt cotton stalk skin be the method for raw material production paper pulp, it is characterized in that: it adopts cotton stalk skin is raw material, described cotton stalk skin adopts enzyme-Ammonium Sulfite Method to make paper pulp, described enzyme-Ammonium Sulfite Method be earlier cotton stalk skin is adopted that degummase removes pectin, behind its lignin of degrading, make thick slurry through imonium boiling step again, slightly starching routinely, production method processing obtains the finished product slurry.
- 2. the method that the cotton stalk skin of employing according to claim 1 is a raw material production paper pulp, it is characterized in that: the degummase that described degummase comes unstuck in the step is 1 by pectase and laccase, lignoenzyme by weight: 1-3: 1 is formulated, degummase solution be by degummase and urea and water by 5: 5: 1000-15: part by weight was formulated in 15: 1000, water temperature is 20-30 ℃, and the described degummase step of coming unstuck is that the cotton stalk skin of short-movie is immersed in the degummase solution under sealing and the static condition 24-48 hour.
- 3. the method that the cotton stalk skin of employing according to claim 2 is a raw material production paper pulp, it is characterized in that: described imonium boiling treatment step is: will the cotton stalk leather jacket after degummase comes unstuck go into digesting apparatus and carry out boiling, ammonium sulfite is 10-13% to the weight ratio of the cotton stalk skin of over dry in the cooking liquor, and the pH value of cooking liquor is adjusted into 7-9 by adding soda ash.
- 4. the method that the cotton stalk skin of employing according to claim 3 is a raw material production paper pulp, it is characterized in that: described cotton stalk skin is removed the cuticula on cotton stalk skin surface with conventional physical method earlier, described cotton stalk skin is broken into earlier the short-movie that length is 3-10cm, adopts enzyme-Ammonium Sulfite Method to carry out follow-up slurrying again.
- 5. the method that is raw material production paper pulp according to claim 3 or the cotton stalk skin of 4 described employings, it is characterized in that: the cotton stalk skin in the described imonium boiling treatment step after degummase comes unstuck is to carry out boiling with reinstalling digesting apparatus after hot water embathes more than 80 ℃ earlier.
- 6. the method that the cotton stalk skin of employing according to claim 5 is a raw material production paper pulp is characterized in that: the cooking liquor in the described imonium boiling step is added with magnesia, and the weight ratio of the cotton stalk skin of described magnesia and over dry is 0.5-2%.
- 7. the method that the cotton stalk skin of employing according to claim 6 is a raw material production paper pulp is characterized in that: described cooking pressure is 0.90-1.05MPa, and boiling temperature is 170-180 ℃, and total cooking time is 15-20min.
- 8. the method that the cotton stalk skin of employing according to claim 7 is a raw material production paper pulp, it is characterized in that: the described thick slurry production method processing production stage that obtains the finished product slurry routinely is: thick slurry becomes screened stock through defibrator process, screened stock through spurt, screening, centrifugation, shove, purification concentrate, discongest, neat and well spaced after, obtain the finished product slurry.
- 9. the method that the cotton stalk skin of employing according to claim 8 is a raw material production paper pulp is characterized in that: described boiling is for carrying out mode continuously, and described digesting apparatus is the inclined tube continuous steamer.
- 10. the method that the cotton stalk skin of employing according to claim 9 is a raw material production paper pulp is characterized in that: described cotton stalk skin is broken into the step of the cotton stalk skin of short-movie and is finished by the roller stretch-breaking device.
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| CN2010101783034A CN101831822B (en) | 2010-05-21 | 2010-05-21 | Method for producing paper pulp by adopting cotton stalk peel as raw material |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102212973A (en) * | 2011-04-05 | 2011-10-12 | 凌受明 | Cooking liquor and preparation method of cotton stalk bark pulp |
| CN102758378A (en) * | 2011-04-28 | 2012-10-31 | 徐奎元 | Method for transforming and recycling old cotton |
| CN104726939A (en) * | 2015-03-19 | 2015-06-24 | 苏州陈恒织造有限公司 | Marihuana degumming process based on flash explosion-ultrasonic wave combined action |
| CN111379187A (en) * | 2018-12-28 | 2020-07-07 | 安徽雪龙纤维科技股份有限公司 | Insulating pulp board and production method thereof |
| CN112127194A (en) * | 2020-09-28 | 2020-12-25 | 刘玉芳 | Production process of cotton stalk molding lunch box pulp with by-product fulvic acid |
| CN117779504A (en) * | 2023-12-15 | 2024-03-29 | 轻工业杭州机电设计研究院有限公司 | Controllable continuous cooking device for acid pulping and acid pulping method |
-
2010
- 2010-05-21 CN CN2010101783034A patent/CN101831822B/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
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| 《中国博士学位论文全文数据库工程科技I辑》 20090215 王权 农业副产物棉秆清洁制浆漂白技术及其机理的研究 86-93 1 , 第2期 2 * |
| 《中国造纸学报》 20061231 白延坤 果胶酶及其在制浆造纸上的应用 88-91 1-10 第21卷, 第2期 2 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102212973A (en) * | 2011-04-05 | 2011-10-12 | 凌受明 | Cooking liquor and preparation method of cotton stalk bark pulp |
| CN102212973B (en) * | 2011-04-05 | 2014-12-03 | 凌受明 | Cooking liquor and preparation method of cotton stalk bark pulp |
| CN102758378A (en) * | 2011-04-28 | 2012-10-31 | 徐奎元 | Method for transforming and recycling old cotton |
| CN102758378B (en) * | 2011-04-28 | 2015-09-09 | 徐奎元 | A kind of method of old cotton transformation regeneration |
| CN104726939A (en) * | 2015-03-19 | 2015-06-24 | 苏州陈恒织造有限公司 | Marihuana degumming process based on flash explosion-ultrasonic wave combined action |
| CN111379187A (en) * | 2018-12-28 | 2020-07-07 | 安徽雪龙纤维科技股份有限公司 | Insulating pulp board and production method thereof |
| CN111379187B (en) * | 2018-12-28 | 2022-03-15 | 安徽雪龙纤维科技股份有限公司 | Insulating pulp board and production method thereof |
| CN112127194A (en) * | 2020-09-28 | 2020-12-25 | 刘玉芳 | Production process of cotton stalk molding lunch box pulp with by-product fulvic acid |
| CN117779504A (en) * | 2023-12-15 | 2024-03-29 | 轻工业杭州机电设计研究院有限公司 | Controllable continuous cooking device for acid pulping and acid pulping method |
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| CN101831822B (en) | 2012-11-14 |
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