CN101748630A - Acid-free pre-hydrolysis enzymolysis-free method for preparing bamboo pulp of Dendrocalamus giganteus Munro series - Google Patents
Acid-free pre-hydrolysis enzymolysis-free method for preparing bamboo pulp of Dendrocalamus giganteus Munro series Download PDFInfo
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- 235000017166 Bambusa arundinacea Nutrition 0.000 title claims abstract description 96
- 235000017491 Bambusa tulda Nutrition 0.000 title claims abstract description 94
- 241001330002 Bambuseae Species 0.000 title claims abstract description 94
- 235000015334 Phyllostachys viridis Nutrition 0.000 title claims abstract description 94
- 239000011425 bamboo Substances 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 49
- 230000007062 hydrolysis Effects 0.000 title abstract 4
- 238000006460 hydrolysis reaction Methods 0.000 title abstract 4
- 235000014706 Dendrocalamus giganteus Nutrition 0.000 title 1
- 240000005340 Dendrocalamus giganteus Species 0.000 title 1
- 239000001301 oxygen Substances 0.000 claims abstract description 36
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 36
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000002994 raw material Substances 0.000 claims abstract description 23
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 15
- 238000009835 boiling Methods 0.000 claims abstract description 15
- 238000005406 washing Methods 0.000 claims abstract description 13
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 239000002253 acid Substances 0.000 claims abstract description 9
- 238000002360 preparation method Methods 0.000 claims abstract description 9
- 238000012216 screening Methods 0.000 claims abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 39
- 238000004061 bleaching Methods 0.000 claims description 26
- 238000004537 pulping Methods 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 13
- 229910021653 sulphate ion Inorganic materials 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000003513 alkali Substances 0.000 claims description 12
- 229920002488 Hemicellulose Polymers 0.000 claims description 11
- 238000011084 recovery Methods 0.000 claims description 11
- 239000000835 fiber Substances 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 9
- 229920002678 cellulose Polymers 0.000 claims description 8
- 238000010411 cooking Methods 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 239000001913 cellulose Substances 0.000 claims description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- QPCDCPDFJACHGM-UHFFFAOYSA-N N,N-bis{2-[bis(carboxymethyl)amino]ethyl}glycine Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC(O)=O QPCDCPDFJACHGM-UHFFFAOYSA-N 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 6
- 239000000123 paper Substances 0.000 claims description 6
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 5
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 claims description 5
- 150000004056 anthraquinones Chemical class 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 239000011777 magnesium Substances 0.000 claims description 5
- 239000003223 protective agent Substances 0.000 claims description 5
- 239000004094 surface-active agent Substances 0.000 claims description 5
- 239000002351 wastewater Substances 0.000 claims description 5
- 241000238631 Hexapoda Species 0.000 claims description 4
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 4
- 241000607479 Yersinia pestis Species 0.000 claims description 4
- 159000000003 magnesium salts Chemical class 0.000 claims description 4
- 241000403681 Dendrocalamus sinicus Species 0.000 claims description 3
- 235000005533 Dendrocalamus sinicus Nutrition 0.000 claims description 3
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 235000009508 confectionery Nutrition 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- -1 iron ion Chemical class 0.000 claims description 3
- 239000002655 kraft paper Substances 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 229910021645 metal ion Inorganic materials 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 235000014347 soups Nutrition 0.000 claims description 3
- 239000003643 water by type Substances 0.000 claims description 3
- 244000271437 Bambusa arundinacea Species 0.000 claims description 2
- 229920000297 Rayon Polymers 0.000 claims description 2
- 239000012752 auxiliary agent Substances 0.000 claims description 2
- 230000000536 complexating effect Effects 0.000 claims description 2
- 239000008139 complexing agent Substances 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 230000008595 infiltration Effects 0.000 claims description 2
- 238000001764 infiltration Methods 0.000 claims description 2
- 239000008234 soft water Substances 0.000 claims description 2
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- 230000002195 synergetic effect Effects 0.000 claims description 2
- 229920005610 lignin Polymers 0.000 abstract description 4
- 239000002893 slag Substances 0.000 abstract 1
- 238000010025 steaming Methods 0.000 abstract 1
- 238000006116 polymerization reaction Methods 0.000 description 16
- 238000005516 engineering process Methods 0.000 description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 239000002585 base Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- 239000002657 fibrous material Substances 0.000 description 3
- 239000004155 Chlorine dioxide Substances 0.000 description 2
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- 238000004140 cleaning Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 229940059442 hemicellulase Drugs 0.000 description 2
- 108010002430 hemicellulase Proteins 0.000 description 2
- 238000009897 hydrogen peroxide bleaching Methods 0.000 description 2
- 238000007781 pre-processing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229920002955 Art silk Polymers 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 239000000460 chlorine Substances 0.000 description 1
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- 239000004753 textile Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Abstract
The invention relates to an acid-free pre-hydrolysis enzymolysis-free method for preparing bamboo pulp of dedrocalamus giganteus manro series, which comprises the following steps: dedrocalamus giganteus manro series raw material which is free from mildew and being damaged by worms is spliced and removed with the bamboo joint to be sent into a bamboo piece steaming cabin and to be steamed for 10 to 30 minutes at a low temperature without the acid medium; the steamed bamboo piece enters a boiling device to be cooked in sulfate to obtain the paper pulp which conforms to the quality requirement, the paper pulp is processed in the traditional procedures of washing, selection and screening to extract the black liquor which is recycled by adding alkaline, the pulp slag is mixed with conventional paper pulp boiling link or is ground to be sent into an alkaline furnace, and the good pulp is removed the lignin and is dissolved out the hemicelluous maximally within relevant set technological conditions according to the oxygen delignification, D1 - Eop - D2 or D1 - P - D2 blenching combination procedures so as to finally obtain the bamboo pulp. Not only the acid pre-hydrolysis or the high-temperature pre-hydrolysis procedures in the traditional preparation method of the bamboo pulp can be eliminated, but also the hemicelluous enzymolysis process with high cost can be prevented; moreover, the preparation rate of the bamboo pulp is improved to 38 to 39.7 percent, and the product consumption and the production cost can be obviously reduced while effectively ensuring the clean production.
Description
Technical field
The present invention relates to a kind of anacidity prehydrolysis and do not have the method that enzymolysis prepares imperial bamboo series bamboo pulp.
Background technology
Pulp is through a series of high high-purity cellulose pulps of a class of cleanliness factor of deviating from lignin and half fiber treatment process and obtaining by plant fiber material.Cellulose is as the abundantest natural reproducible resource of nature, all the time all inseparable with the mankind's social activities, particularly in modern science and technology highly developed today, cellulose and the porous field of derivant material thereof almost do not have can't be obtained, all-embracing, as the artificial silk of the usefulness of weaving and artificial cotton, materials such as broad-spectrum glassine paper, cellulose esters, cellulose ethers all are refining with plant fiber material and pulp that come is a basic material.
With regard to the processing technology routine of pulp preparation classics, mainly experience the sour prehydrolysis of plant fiber material and removed quite a few hemicellulose, the high temperature sulphate cook is removed most lignin, and then when improving paper pulp to higher whiteness by multistage bleaching, remove lignin and hemicellulose remaining in the paper pulp as much as possible, final acquisition-content of cellulose is higher than the purifying paper pulp more than 93%.It is high-leveled and difficult in handling and the pulp yield only has 1/3 low yield two big drawbacks that this processing technology routine exists sour prehydrolysis waste liquor contamination load, this high investment, high pollution, hangs down the technology of preparing of output, restricted the sound development of pulp industry to a great extent.Though people went into hemicellulose enzymolysis technology by group and can substitute sour prehydrolysis process and prepare pulp afterwards, can not the take on a new look backward situation of pulp preparation industry of high investment, low output of the use of expensive hemicellulase.Should seek oligosaprobic process, obtain simultaneously high output again, this is the target that pulp prepares industrial quarters demand all the time, is that present people also do not have important substantial breakthrough in this respect, thereby also becomes the bottleneck of restriction pulp industrial development.
Summary of the invention
The purpose of this invention is to provide a kind of anacidity prehydrolysis and do not have the method that enzymolysis prepares imperial bamboo series bamboo pulp, this method is basic physics and the chemical feature according to imperial bamboo series raw material such as big dragon bamboo, leaflet dragon bamboo, bitter imperial bamboo, sweet imperial bamboo, Dendrocalamus sinicus, with raising-content of cellulose to greatest extent is target, by sulphate cook technology and follow-uply systematically optimize completely without chlorine ECF bleaching process, staying out of sour prehydrolysis or high temperature prehydrolysis, also stay out of under the prerequisite of hemicellulose enzymolysis, obtain to meet the preparation method of bamboo pulp of standard-required.
The present invention is that the anacidity preliminary treatment does not have the hemicellulose enzymolysis simultaneously and prepares imperial bamboo series preparation method of bamboo pulp.Dragon bamboo series raw material through remove ring every, chip, presteaming, the dress pot adds soup, sulphate cook, oxygen delignification, short two sections chlorine dioxide D2 of hydrogen peroxide bleaching Eop-of one section chlorine dioxide D1-oxygen or D1-hydrogen peroxide bleaching P-D2 bleaching make alpha cellulose content and surpass 95%, and yield meets or exceeds 38% bamboo pulp.This method comprises following processing step:
Except as otherwise noted, the percentage that is adopted among the present invention is percetage by weight.
(1) the imperial bamboo series raw material process of storing up behind the felling debranching is kept under strict control and is not gone mouldy, free from insect pests, the bamboo of storing up one period time breaks bamboo, section, remove ring every, bamboo chip is sent into the decatize storehouse in 100-135 ℃ of decatize 10-30min, the decatize process is except that saturated steam, stay out of any acid medium that adds, bamboo chip after the decatize is delivered to digesting apparatus, and the liquid that the decatize condensation is got off then pumps into sulphate cook and extracts black liquor, enters chemical recovery system together.
(2) count the alkali charge of 18-24% according to NaOH from the bamboo chip alkali charge of step (1), sulphidity 5-28%, anthraquinone consumption 0.05-0.5%, dosage of surfactant 0.1-2.0%, weight liquor ratio 1: 3-5, press boiling curve intensification 90-180min, maximum temperature 140-165 ℃, insulation 120-300min carries out kraft cooking, after boiling finishes, implement spurting of slurry, wash according to the traditional handicraft route, choosing, sieve, the black liquor that extracts enters chemical recovery system, screenings can sneak into the preparation process of common bamboo pulp or grind after send into alkali recovery furnace burning, good slurry is treated oxygen delignification.
Boiling pulping result: screened yield 41-44%, Kappa number 8-014, degree of polymerization 1020-1250.
(3) send into the oxygen delignification tower from the good slurry of step (2), press 0.4-0.8MPa, alkali charge 1.5-4.0%, Mg in the dense 10-30% of slurry, initial oxygen
2SO
4Oxygen delignification 45-90min under consumption 0.05-0.5%, temperature 85-105 ℃ the condition, by the wash degree washing of technological requirement, specific requirement is omitted afterwards, and oxygen takes off the recycle-water of waste water as the washing of step (2) cooking of pulp.
Oxygen destarch result: to raw material yield 39-41%, Kappa number 4-7.5, whiteness 45-52%, degree of polymerization 810-970.
(4) from the oxygen destarch of step (3) according to the D1-Eop-D2 bleaching schedule, the D1 section is starched dense 10-12%, ClO
2Consumption 0.5-1.5%, temperature 70-80 ℃, control pH are that 3.5-4.0 handles 60-120min; The Eop section is starched dense 10-15%, H
2O
2Consumption 1.5-2.0%, NaOH consumption 1.0-2.0%, Na
2SiO
3Consumption 1.5-3.0%, magnesium salt protective agent consumption 0.05-0.5% can be MgSO
4, MgCO
3And Mg (OH)
2In any or their compound, complexing agent can be selected edta edta, diethylene triamine pentacetic acid (DTPA) DTPA etc. or their compound, consumption 0.05-0.5%, initial oxygen is pressed 0.4-0.6MPa, is handled 45-75min in temperature 85-105 ℃; The D2 section is starched dense 10-12%, ClO
2Consumption 0.3-0.5%, temperature 70-80 ℃, control pH are that 3.5-4.0 handles 90-150min; All by the wash degree washing of technological requirement, specific requirement was omitted when each section bleaching finished.
Bleached pulp result: to raw material yield 38.0-39.5%, whiteness 80-88%, degree of polymerization 530-670.
(5) from the oxygen destarch of step (3) according to the D1-P-D2 bleaching schedule, the D1 section is starched dense 10-12%, ClO
2Consumption 0.5-1.5%, temperature 70-80 ℃, control pH are that 3.5-4.0 handles 60-120min; The P section is starched dense 10-15%, H
2O
2Consumption 1.5-3.5%, NaOH consumption 1.0-2.0%, Na
2SiO
3Consumption 1.5-3.0%, magnesium salt protective agent consumption 0.05-0.5%, the complexing of metal ion agent can be selected EDTA, DTPA etc. or their compound, and consumption 0.05-0.5% handles 60-120min in temperature 65-95 ℃; The D2 section is starched dense 10-12%, ClO
2Consumption 0.3-0.5%, temperature 70-80 ℃, control pH are that 3.5-4.0 handles 90-150min; All by the wash degree washing of technological requirement, specific requirement was omitted when each section bleaching finished.
Bleached pulp result: to raw material yield 38.2-39.7%, whiteness 77-85%, degree of polymerization 560-700.
(6) manufacture paper with pulp by the standard quantitative of bamboo pulp by pulp machine from the bleached pulp of step (4) or (5), the institute's water of manufacturing paper with pulp is a soft water, whole pulp machine pipe-line system requires to avoid as far as possible bringing into of iron ion, except that the enriched water reuse, all the other plain boiled waters are by the fibre recovery machine recycled fiber, fiber is utilized as conventional paper pulp, and the plain boiled water reuse after the filtration is to the washing process of bleaching.
Bamboo pulp standard testing result: the result who moisture, viscosity, alpha cellulose content, ash content, iron content, whiteness, suction base number, quantitative etc. is measured according to the textile industry standard of " bamboo pulp for cellulose viscose " is in the scope of standard-required.
Step (1) storage of various imperial bamboo raw materials need not had go mouldy, free from insect pests; Section need remove ring every; But the decatize storehouse maximum pressure-bearing 0.4MPa of bamboo chip.
As substituting of decatize storehouse, bamboo chip can not add the presteaming of soup elder generation yet in digesting apparatus, get rid of after the condensate liquid, continues follow-up cooking procedure, the presteaming process does not have any acid medium of adding and gets involved, presteaming low temperature 100-135 ℃, finish in the 10-30min in short-term.
The bamboo chip boiling of step (2) is carried out according to the sulphate cook condition of conventional paper pulp, has added the surfactant of anthraquinone auxiliary agent and promotion reactive infiltration and dissolving, strengthens delignification, simultaneously degraded and a large amount of hemicelluloses of stripping.
The bamboo pulp oxygen delignification of step (3) is the continuation of delignification and dissolving hemicellulose process, also is to adjust the formation link of other indexs of correlation of paper pulp near the bamboo pulp standard.
The D1-P-D2 bleaching schedule of the D1-Eop-D2 bleaching schedule of step (4) and step (5) only differs in the hydrogen peroxide section whether get involved the oxygen facilitation, takes which kind of program could satisfy the requirement of bamboo pulp standard index according to synergistic relation before and after the slurrying and decides.
The process of manufacturing paper with pulp of step (6) bamboo pulp is a major premise with the ash content and the iron ion content controlling index of bamboo pulp fully, restriction that the pipeline metal ion is got involved has been proposed and to the restriction of water quality, simultaneously, the angle of collateral security pulp quality proposes corresponding requirements to plain boiled water reuse limit.
Compared with prior art, the invention has the beneficial effects as follows:
(1) though pulping process has also adopted the decatize preprocessing process, but there is not any intervention that adds acid medium, and steam temperature is far below the high temperature of conventional procedure up to 160-170 ℃, process only has the condensed water after the small part decatize, be dissolved with a small amount of soluble organic of bamboo simultaneously, can incorporate alkali into and reclaim the black liquor processing and non-wastewater discharge.
(2) after the sulphate cook of bamboo, do not relate to the process of acid hydrolysis hemicellulose yet, therefore, do not have the generation of acid hydrolysis waste liquid and the problem of special disposal, the wastewater problem of thoroughly having exempted the classical acid preprocessing process and being difficult to administer.
(3) deviating from of hemicellulose is to begin organically to act synergistically to the front and back of whole pulping process by the quality control from the bamboo raw material to finish in the middle of the bamboo pulp, there is not processing procedure in the process by means of hemicellulase yet, thereby, the hemicellulose enzymolysis process of also having exempted high cost investment simultaneously.
(4) production process of bamboo pulp is except the low temperature presteaming process to bamboo chip, all the other pulping process are the process of conventional bleaching sulfate pulp slurrying maturation, black digestion liquid enters chemical recovery system, bleaching effluent enters ripe middle-stage wastewater processing procedure and handles, and is easy to realize the production that cleans of bamboo pulp slurrying.
(5) have only the pulping yield of 33% front and back to compare usually with pulp, the high yield level that the bamboo pulp here can reach 38-39.7% is very outstanding, breaking through pulp traditional preparation process technology, when realizing cleaning production, also accomplished the abundant repayment of low input, high production.
The specific embodiment
By specific embodiment given below, can further be well understood to the present invention.But they are not limitation of the invention.
Embodiment 1
The sweet imperial bamboo chip of getting material ready is sent into the decatize storehouse in 130 ℃ of decatize 15min, the decatize process is except that saturated steam, stay out of any acid medium that adds, bamboo chip after the decatize is delivered to digesting apparatus, and the liquid that the decatize condensation is got off then pumps into sulphate cook extraction black liquor and enters chemical recovery system together.The sulphate cook condition of decatize bamboo chip in decatize before the over dry quality of bamboo chip, alkali charge is counted 22% alkali charge, sulphidity 24%, anthraquinone consumption 0.3%, dosage of surfactant 1.0%, is contained after the decatize in the bamboo chip moisture interior weight liquor ratio 1: 3.5 according to NaOH, carries out kraft cooking by boiling curve intensification 150min, 162 ℃ of maximum temperatures, insulation 180min.
After boiling finishes, the good slurry through washing, select, sieving,, initial oxygen dense 15% at slurry pressed 0.6MPa, alkali charge 3.5%, Mg
2SO
4Oxygen takes off 60min under the condition that consumption 0.5%, temperature are 98 ℃.The oxygen destarch enters the D1-Eop-D2 bleaching schedule after cleaning, the D1 section is starched dense 12%, ClO
2Consumption 1.5%, 75 ℃ of temperature, control pH are that 3.5-4.0 handles 120min; The Eop section is starched dense 15%, H
2O
2Consumption 2.0%, NaOH consumption 1.6%, Na
2SiO
3Consumption 2.5%, protective agent consumption 0.3%, compound complex agent consumption 0.5%, initial oxygen is pressed 0.5MPa, is handled 75min for 95 ℃ in temperature; The D2 section is starched dense 12%, ClO
2Consumption 0.4%, 80 ℃ of temperature, control pH are that 3.5-4.0 handles 120min; When finishing, each section bleaching all washs by the code requirement wash degree.Oxygen delignification section scrub raffinate is used to the washing of cooking of pulp, and all by the wash degree washing of technological requirement, specific requirement was omitted after each section bleaching finished.
Bleached pulp is manufactured paper with pulp by the standard quantitative of bamboo pulp by pulp machine, and except that the enriched water reuse, all the other plain boiled waters are by the fibre recovery machine recycled fiber, and fiber is utilized as conventional paper pulp, and the plain boiled water reuse after the filtration is to the washing process of bleaching.
Boiling pulping result: screened yield 42.8%, Kappa number 11.3, the degree of polymerization 1160.
Oxygen destarch result: to raw material yield 40.2%, Kappa number 5.8, whiteness 49%, the degree of polymerization 890.
Bleached pulp result: to raw material yield 38.5%, whiteness 86%, the degree of polymerization 590.
Bamboo pulp standard testing result: moisture 9.7%, viscosity 12.4mPas, alpha cellulose content 95.8%, ash content 0.08%, iron content 16.8mg/kg, whiteness 84%, suction base number 625%, quantitative 647g/m
2
Embodiment 2
Repeat embodiment 1, following difference is arranged: raw materials used is the big dragon bamboo, and the big dragon bamboo chip is sent into the decatize storehouse in 135 ℃ of decatize 15min; Sulphate cook NaOH consumption 24%, sulphidity 21%, intensification 180min, 165 ℃ of maximum temperatures, insulation 160min; The D1 section ClO of D1-Eop-D2 bleaching
2Consumption 1.25%, D2 section ClO
2Consumption 0.3%.
Boiling pulping result: screened yield 41.3%, Kappa number 9.2, the degree of polymerization 1080.
Oxygen destarch result: to raw material yield 39.4%, Kappa number 4.7, whiteness 51%, the degree of polymerization 830.
Bleached pulp result: to raw material yield 38.1%, whiteness 87%, the degree of polymerization 560.
Bamboo pulp standard testing result: moisture 9.8%, viscosity 11.5mPas, alpha cellulose content 96.0%, ash content 0.07%, iron content 15.2mg/kg, whiteness 85%, suction base number 612%, quantitative 665g/m
2
Embodiment 3
Repeat embodiment 1, following difference is arranged: raw materials used is Dendrocalamus sinicus, and the giant dragon bamboo chip is sent into the decatize storehouse in 125 ℃ of decatize 25min; Sulphate cook NaOH consumption 24%, sulphidity 21%, intensification 150min, 157 ℃ of maximum temperatures, insulation 240min; Oxygen takes off that oxygen takes off 80min under the condition of 95 ℃ of temperature.The P section of D1-P-D2 bleaching is starched dense 15%, H
2O
2Consumption 2.5%, NaOH consumption 1.8%, Na
2SiO
3Consumption 2.5%, MgSO
4Consumption 0.5%, compound complex agent consumption 0.3% is handled 110min for 80 ℃ in temperature; D2 section ClO
2Consumption 0.5%.
Boiling pulping result: screened yield 43.1%, Kappa number 12.7, the degree of polymerization 1180.
Oxygen destarch result: to raw material yield 41.0%, Kappa number 6.5, whiteness 47%, the degree of polymerization 900.
Bleached pulp result: to raw material yield 39.2%, whiteness 86%, the degree of polymerization 620.
Bamboo pulp standard testing result: moisture 9.4%, viscosity 13.7mPas, alpha cellulose content 95.4%, ash content 0.08%, iron content 17.0mg/kg, whiteness 84%, suction base number 636%, quantitative 705g/m
2
Embodiment 4
Repeat embodiment 1, following difference is arranged: raw materials used is bitter imperial bamboo, and bamboo chip is sent into the decatize storehouse in 130 ℃ of decatize 20min; Sulphate cook NaOH consumption 23%, sulphidity 18%, intensification 150min, 157 ℃ of maximum temperatures, insulation 270min; Oxygen takes off that oxygen takes off 80min under the condition of 95 ℃ of temperature.The P section of D1-P-D2 bleaching is starched dense 15%, H
2O
2Consumption 3.0%, NaOH consumption 2.0%, Na
2SiO
3Consumption 2.5%, MgSO
4Consumption 0.5%, compound complex agent consumption 0.5% is handled 110min for 80 ℃ in temperature; D2 section ClO
2Consumption 0.4%.
Boiling pulping result: screened yield 42.2%, Kappa number 11.1, the degree of polymerization 1120.
Oxygen destarch result: to raw material yield 40.3%, Kappa number 5.9, whiteness 48%, the degree of polymerization 870.
Bleached pulp result: to raw material yield 38.7%, whiteness 87%, the degree of polymerization 600.
Bamboo pulp standard testing result: moisture 9.5%, viscosity 12.8mPas, alpha cellulose content 95.5%, ash content 0.08%, iron content 16.5mg/kg, whiteness 84%, suction base number 617%, quantitative 691g/m
2
Claims (6)
1. an anacidity prehydrolysis does not have the pulping process that enzymolysis prepares imperial bamboo series bamboo pulp, and this method comprises the steps:
(1) the imperial bamboo series raw material process of storing up behind the felling debranching is kept under strict control and is not gone mouldy, free from insect pests, the bamboo of storing up one period time breaks bamboo, section, remove ring every, bamboo chip is sent into the decatize storehouse in 100-135 ℃ of decatize 10-30min, and the decatize process stays out of any acid medium that adds except that saturated steam, bamboo chip after the decatize is delivered to digesting apparatus, and the liquid that the decatize condensation is got off then pumps into sulphate cook extraction black liquor and enters chemical recovery system together;
(2) count the alkali charge of 18-24% according to NaOH from the bamboo chip alkali charge of step (1), sulphidity 5-28%, anthraquinone consumption 0.05-0.5%, dosage of surfactant 0.1-2.0%, weight liquor ratio 1: 3-5, press boiling curve intensification 90-180min, maximum temperature 140-165 ℃, insulation 120-300min carries out kraft cooking, after boiling finishes, implement spurting of slurry, wash according to the traditional handicraft route, choosing, sieve, the black liquor that extracts enters chemical recovery system, screenings can sneak into the preparation process of common bamboo pulp or grind after send into alkali recovery furnace burning, good slurry is treated oxygen delignification;
(3) send into the oxygen delignification tower from the good slurry of step (2), press 0.4-0.8MPa, alkali charge 1.5-4.0%, Mg in the dense 10-30% of slurry, initial oxygen
2SO
4Oxygen takes off 45-90min under consumption 0.05-0.5%, temperature 85-105 ℃ the condition, and by the wash degree washing of process specification requirements, oxygen takes off the recycle-water of waste water as the washing of step (2) cooking of pulp afterwards;
(4) from the oxygen destarch of step (3) according to the D1-Eop-D2 bleaching schedule, the D1 section is starched dense 10-12%, ClO
2Consumption 0.5-1.5%, temperature 70-80 ℃, control pH are that 3.5-4.0 handles 60-120min; The Eop section is starched dense 10-15%, H
2O
2Consumption 1.5-2.0%, NaOH consumption 1.0-2.0%, Na
2SiO
3Consumption 1.5-3.0%, magnesium salt protective agent consumption 0.05-0.5% can be MgSO
4, MgCO
3And Mg (OH)
2In any or their compound, complexing agent can be selected EDTA, DTPA etc. or their compound, consumption 0.05-0.5%, initial oxygen is pressed 0.4-0.6MPa, is handled 45-75min in temperature 85-105 ℃; The D2 section is starched dense 10-12%, ClO
2Consumption 0.3-0.5%, temperature 70-80 ℃, control pH are that 3.5-4.0 handles 90-150min; When each section bleaching finishes all the wash degree by process specification requirements wash;
(5) from the oxygen destarch of step (3) according to the D1-P-D2 bleaching schedule, the D1 section is starched dense 10-12%, ClO
2Consumption 0.5-1.5%, temperature 70-80 ℃, control pH are that 3.5-4.0 handles 60-120min; The P section is starched dense 10-15%, H
2O
2Consumption 1.5-3.5%, NaOH consumption 1.0-2.0%, Na
2SiO
3Consumption 1.5-3.0%, magnesium salt protective agent consumption 0.05-0.5%, the complexing of metal ion agent can be selected EDTA, DTPA etc. or their compound, and consumption 0.05-0.5% handles 60-120min in temperature 65-95 ℃; The D2 section is starched dense 10-12%, ClO
2Consumption 0.3-0.5%, temperature 70-80 ℃, control pH are that 3.5-4.0 handles 90-150min; When each section bleaching finishes all the wash degree by technological requirement wash;
(6) manufacture paper with pulp by the standard quantitative of bamboo pulp by pulp machine from the bleached pulp of step (4) or (5), the institute's water of manufacturing paper with pulp is a soft water, whole pulp machine pipe-line system requires to avoid as far as possible bringing into of iron ion, except that the enriched water reuse, all the other plain boiled waters are by the fibre recovery machine recycled fiber, fiber is utilized as conventional paper pulp, and the plain boiled water reuse after the filtration is to the washing process of bleaching;
Above-mentioned percentage is percetage by weight.
2. anacidity prehydrolysis according to claim 1 does not have the pulping process that enzymolysis prepares imperial bamboo series bamboo pulp, it is characterized in that: described imperial bamboo series raw material is big dragon bamboo, leaflet dragon bamboo, bitter imperial bamboo, sweet imperial bamboo, Dendrocalamus sinicus.
3. anacidity prehydrolysis according to claim 1 does not have the pulping process that enzymolysis prepares imperial bamboo series bamboo pulp, it is characterized in that: step (1) storage of various imperial bamboo raw materials need not had go mouldy, free from insect pests; Section need remove ring every; But the decatize storehouse maximum pressure-bearing 0.4MPa of bamboo chip.
4. anacidity prehydrolysis according to claim 3 does not have the pulping process that enzymolysis prepares imperial bamboo series bamboo pulp, it is characterized in that: as substituting of decatize storehouse, bamboo chip can not add the presteaming of soup elder generation yet in digesting apparatus, get rid of after the condensate liquid, continue follow-up cooking procedure, the presteaming process does not have any acid medium of adding and gets involved, presteaming low temperature 100-135 ℃, finish in the 10-30min in short-term.
5. anacidity prehydrolysis according to claim 1 does not have the pulping process that enzymolysis prepares imperial bamboo series bamboo pulp, it is characterized in that: the bamboo chip boiling of step (2) is carried out according to the sulphate cook condition of conventional paper pulp, added the surfactant of anthraquinone auxiliary agent and promotion reactive infiltration and dissolving, strengthen delignification, simultaneously degraded and a large amount of hemicelluloses of stripping.
6. anacidity prehydrolysis according to claim 1 does not have the pulping process that enzymolysis prepares imperial bamboo series bamboo pulp, it is characterized in that: the D1-P-D2 bleaching schedule of the D1-Eop-D2 bleaching schedule of step (4) and step (5) only differs in the hydrogen peroxide section whether get involved the oxygen facilitation, takes which kind of program could satisfy the index request of bamboo pulp for cellulose viscose national standard FZ/T51002-2006 according to synergistic relation before and after the slurrying and decides.
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