CN1779068A - High-effective and low-consumption cleaning biological pulp-making process from wheatgrass - Google Patents
High-effective and low-consumption cleaning biological pulp-making process from wheatgrass Download PDFInfo
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- CN1779068A CN1779068A CN 200410046963 CN200410046963A CN1779068A CN 1779068 A CN1779068 A CN 1779068A CN 200410046963 CN200410046963 CN 200410046963 CN 200410046963 A CN200410046963 A CN 200410046963A CN 1779068 A CN1779068 A CN 1779068A
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Abstract
The invention is about the high-efficient low-loss cleaning biological pulping process. The technical scheme includes activating the high efficient microbial inoculums, preparing the forage fodder, preparing the culture and inoculums, fermenting, washing the fermenting forage fodder and dehydrating, hulling with sig water, guniting, pulping, blanching and defibrinating. The quality of the ryegrass pulp is the same as the broad-leaved wood pulp and the advantage of it is: (1)the cost of the sodium hydrate reduce by 70%; (2) the energy can be saved above 30%; (3) the yield of the pulp is improved by five parents; (4) the inorganic pollutant and the organic pollutant are 55Kg/T and the 320Kg/T respectively. So it can decrease the pollutant to 70% and 60%.
Description
One, technical field
The present invention relates to paper industry and carry out the efficient low-consume clean type production technology of ryegrass pulping practicality.
Two, background technology
(1) present situation and the development trend of domestic and international pulp and paper industry
The effect that paper industry is brought into play in modern economy is increasing.In developed countries such as the U.S., Japan, Canada, Finland, Sweden, the paper maker had become one of its national economy ten big pillar manufacturing industry already.
Non-wood pulp accounts for more than 80% of total slurry amount in China's pulp industry, and the production of straw pulp is still based on alkaline process (comprising sulfate process).At present, there are problems in China's papermaking industry, mainly is that weight, low, the medium-to-high grade paper inefficiency of production of high-grade paper pulp proportion are born in pollution control, scope of the enterprise is little and construction investment is not enough.Traditional chemical reagent cooking process is that chemical reagent is made into certain density solution, then wheat straw is soaked wherein and hot digestion a few hours, extracts the process of pure fiber in order to remove non-cellulose.This method not only consumes a large amount of industrial chemicals and the energy, and damage fiber production and quality, serious environment pollution.
Along with development of biology, people's using microbe has carried out broad research to the pulping process of wheat straw.Studies show that, microorganism with non-cellulose physical capacity in the degraded draft fibrous raw material extensively is present in nature, based on sickle-like bacteria, rhizopus, aspergillus and some basidiomycetes, bacterium has drumstick shape bacillus, bacillus amyloliquefaciens, Ke Shi bacillus, false monospore bacillus, bacillus subtilis, Ou Wenshi bacillus etc. in the fungi.But up to now, utilize 50% above non-cellulose material in the microbial degradation draft fibrous raw material, promptly really reach the research report of bio-pulping realistic scale, except Hemp Inst., China Academy of Agricultural Sciences, do not see that almost domestic and international other unit or individual delivered relevant report.
Hemp Inst., China Academy of Agricultural Sciences specializes in bast-fibre biological degumming and studies more than 30 year, not only filters out large quantities of crudefiber crops bacterial classification that comes unstuck, and research has formed the patent of invention of a series of bast-fibre biological degummings and identified achievement.In recent years, this country one belongs to " 863 " planning item is subsidized down, is parent with original patent of invention preservation t bacteria 85-260, has obtained a strain engineered strain (the numbering CXJZ95-198 of our unit) by the breeding of modern biotechnology means.This bacterial strain is to ramie, bluish dogbane, flax, crudefiber crop and Chinese alpine rushs such as bluish dogbane, wheat straw, non-cellulose material in the herbaceous plant fibrous raw materials such as offal has very strong degradation capability, has successively formed " a kind of process for high-efficiency clean bio-pulping kenaf bast " (number of patent application: 02108682.6), " a kind of draft fibre factory comes unstuck or the slurrying high-effect bacterial preparation process " (patent No.: ZL02108820.9), " Chinese alpine rush under a kind of batch production condition/kenaf bast bio-pulping process " (number of patent application: 03102808.X) wait three patents of invention and " high-efficiency cleaning type kenaf bast degumming technology " (agricultural section really reflects [2004] No. 032), " high-efficiency and energy-saving type Chinese alpine rush bio-pulping technology " (No. [2002] the 021st, Hunan section mirror), three of " flax quick bio degumming technology " (agricultural section really reflect [2004] No. 024) etc. are identified achievement.
Adopting the method for pectin, hemicellulose, lignin in the biotechnology degraded draft fibrous raw material, is the development trend of paper industry.Biological degradation method not only can be guaranteed fiber production and quality, and can reduce production costs, alleviate environmental pollution.
(2) the quasi-solution problem of determining
The purpose of this project is that the action substitution with non-cellulose mass degradations such as pectin, hemicellulose, lignin in the enzymatic wheat straw of microorganism secretion is the chemical reaction at center with the caustic soda boiling, solve a large amount of industrial chemicals of consumption and the energy, damage fiber production and outstanding problems such as quality, serious environment pollution that traditional pulping process exists, for further making up the technical innovation platform of draft fiber biological pulping process research, promote the technological revolution establish a firm foundation of China's pulping and paper-making industry.
The guardian technique that this project quasi-solution is determined relates to following 2 aspects, 6 contents:
1, the what use is made of high-effect bacterial is removed the non-cellulose material more than 50% in the forage fast
(1) adopt the viable bacteria fermentation mode to help reducing production costs.Ferment on the forage directly being inoculated into after " high-effect bacterial " activation, both can strengthen biologic product to non-cellulose material in the forage. " aggressiveness " (through the spiral biochemical reaction of " the non-cellulose material is cultivated bacterium-bacterium secretase-enzymatic degradation non-cellulose material ", energy " directional blasting " pectin, non-cellulose material molecular structures such as hemicellulose and part lignin, make it to take place " block collapse "), and can realize 2 targets: the one, consume part non-cellulose material (pollution abatement), the 2nd, reduce the further expense of preparation complex enzyme formulation.
(2) the high-effect bacterial activation should realize the high target of fugitive rate of time as far as possible.Adopt degrade non-cellulose material in the forage of viable bacteria fermentation mode, when the function one of bacterial strain regularly, the high more ferment effect of number of viable is good more, there is no question about for this.So, in the activation process of high-effect bacterial, should shorten the microorganism laundering period, guarantee the microorganism necessary process conditions of growth fast by As soon as possible Promising Policy.This shows, select factors such as proper culture medium prescription, the needed temperature of adjusting growth of microorganism, oxygen-supplying amount, pH just to seem especially important.
(3) the viable bacteria fermentation cycle will be controlled at 8h needs to guarantee process conditions with interior.The viable bacteria fermentation cycle is longer than 8h, is unfavorable for the batch production production management.Analyze theoretically, suppose that each bacterium weight is 10
-12Gram, per kilogram forage absorption 10
10Individual thalline (i.e. 10 milligrams of thalline) was through fermentation in 4-6 hour, and it is possible consuming the above non-cellulose material of 200 grams.Can the decomposition rate in wheat straw viable bacteria fermentation process reach this level, must satisfy temperature, pH, the agent of metal ion isoreactivity that microbial growth is bred the temperature of needs, humidity, pH, nutrition etc. and enzymatic reaction needs simultaneously.
(4) remove " block collapse " residue that fermentation forage adheres to and help reducing the industrial chemicals consumption of subsequent handling.In the viable bacteria fermentation process, non-cellulose material molecular structures such as the enzyme classes of CXJZ95-198 bacterial strain secretion can " directional blasting " pectin, hemicellulose and part lignin, but these materials are not all consumed by microorganism, especially " block collapse " residue is attached on the fermentation forage, and they can be removed by washing.If do not remove, be certain to the increase that causes the subsequent handling industrial chemicals to consume.
2, how to make the forage of handling by fermentation become quality and be better than the Straw Pulp that the conventional chemical method is produced
(1) adopt " diluted alkaline shelling " can remedy the deficiency of viable bacteria fermentation.Non-cellulose materials such as the enzyme classes of CXJZ95-198 bacterial strain secretion can efficient degradation pectin, hemicellulose and part lignin, still, for almost not effect of the very high wheat straw epidermal tissue of keratinization degree (plan is referred to as " shell ").According to conventional chemical slurrying principle, explore the technology of under alkali condition, carrying out " shelling ", be feasible as replenishing of wheat straw bio-pulping process.
(2) reduce making beating intensity and help improving the straw pulp quality.Comparative studies by draft fibrous raw material chemical pulping principle and bio-pulping principle finds that the chemical pulping method need be used 17.5%NaOH+4%HBF
4Handling the mannose (" bridge " that cellulose is connected with non-cellulose or " tie ") that just can extract has all thoroughly been consumed by microorganism in bio-pulping process.In other words, through the forage that viable bacteria fermentation is handled, the decentralization of its fiber is good especially, and therefore, appropriateness reduction making beating intensity is beneficial certainly for improving the straw pulp quality in pulping process.
Three, summary of the invention
The technical scheme that the present invention intends adopting relates to the whole technology of wheat straw bio-pulping, and technical process comprises operations such as the washing of high-effect bacterial activation, forage preparation, dosing inoculation, wet fermentation, fermentation forage and dehydration, diluted alkaline shelling, making beating, screening the pulp, bleaching, defibrination.
(1) high-effect bacterial activation
Get the vacuum-packed CXJZ95-198 high-effect bacterial of preserving, insert by the inoculum concentration of 500ml/ ton forage and fill in the air agitation fermentation tank of konjaku-soya-bean cake culture medium, at 35 ℃ ± 1 ℃, stirring frequency 200rpm～380rpm, throughput 301/m
3Min～3001/m
3Cultivate 5～6hr under the condition of min, jar internal pressure 0.05mpa, obtain the activation bacteria suspension; The prescription of konjaku-soya-bean cake culture medium was that 200 purpose konjaku flours and soybean cake powder are respectively 0.5% and 1.5%, yeast juice 0.05%～0.10%.
(2) forage is prepared
Wheat straw raw material is carried out removal of impurities. after removing slag, managing, cut into the long segment of 3～5cm, be beneficial to microorganism absorption, infect.
(3) dosing inoculation
Is that 1: 2 ± 0.2 ratio adds running water and regulates water temperature to 34 ℃ ± 1 ℃ to the dosing bucket and with steam in forage to bacteria suspension, add 0.1% agricultural composite fertilizer again, stirring and evenly mixing when adding the activation bacteria suspension, then the bacteria suspension for preparing evenly is sprayed onto on the forage, the round loading density is 100kg/m
3± 20kg/m
3, the forage moisture content reaches 69% ± 1%, bacteria containing amount is 10
10Cfu/kg, last, drop removes surplus liquid.
(4) wet fermentation
Postvaccinal forage is placed the condition bottom fermentation 7.0h ± 0.5h of 34 ℃ ± 3 ℃ of temperature, relative humidity 85% ± 5%; The sign that fermentation is finished is that forage is softening, the surface is blue look, rubs with hand and is separated into filament.
(5) washing and the dehydration of fermentation forage
In the container that forage is housed, inject 80 ℃ ± 5 ℃ warm water and circulation flushing forage 15min～30min in the ratio of 2～3 times of forage dry weights, then, adopt Water Extraction Machinery to dewater, perhaps use the air pressure of 0.2mpa to extrude the forage free water, making fermentation forage moisture content is 60% ± 5%, and forage dry weight yield is 80% ± 2%.
(6) shelling
In the ratio of forage dry weight 3.0% ± 0.3% forage spray concentration after to dehydration 2% NaOH solution, make the forage moisture content reach 210%～230%, under vapour pressure in container≤0.15mpa condition, boiling 2.0h ± 0.5h, perhaps in container under vapour pressure 〉=0.55mpa condition, boiling 1.5h ± 0.5h finally makes the residual alkali concn of slurry between 0.6g/l～2.0g/l, and the K value is between 10.5～13.8.
(7) whitewashing or half stuff
Shotcreting process is after shelling is finished under vapour pressure in container 〉=0.55mpa condition, directly to utilize the container internal gas pressure that slurry is sprayed; The half stuff technological parameter is the heavy 8.0kg～9.0kg of the stone roller of cutter under the beater, beating time 40min ± 10min.
(8) screening the pulp
The scalping aperture is 6mm, slagging-off rate≤0.5%; The dusting cover aperture is 2.2mm, slagging-off rate≤5.0%.
(9) bleaching
Amount of slurry 800kg/ groove, bleaching liquor consumption 10%～12%, whiteness 69.2%～74.8%.
(10) defibrination
Time 35min, beating degree is more than 55.
Four, description of drawings
The accompanying drawing that the present invention relates to is: the activation of 1-high-effect bacterial, 2-forage is prepared, 3-dosing inoculation, 4-wet fermentation, the washing and the dehydration of 5-fermentation forage, the shelling of 6-diluted alkaline, 7-whitewashing or half stuff, 8-screening the pulp, 9-bleaching, 10-defibrination.
Five, the specific embodiment
(1) technical scheme
The technical scheme that the present invention intends adopting relates to the whole technology of wheat straw bio-pulping, and technical process comprises operations such as the washing of high-effect bacterial activation, forage preparation, dosing inoculation, wet fermentation, fermentation forage and dehydration, diluted alkaline shelling, making beating, screening the pulp, bleaching, defibrination.
1. the vacuum-packed CXJZ95-198 high-effect bacterial of preserving is got in the high-effect bacterial activation, inoculum concentration access by 500ml/ ton forage fills in the air agitation fermentation tank of konjaku-soya-bean cake culture medium, at 35 ℃ ± 1 ℃, stirring frequency 200rpm～380rpm, throughput 301/m
3Min～3001/m
3Cultivate 5～6hr under the condition of min, jar internal pressure 0.05mpa, obtain the activation bacteria suspension; The prescription of konjaku-soya-bean cake culture medium was that 200 purpose konjaku flours and soybean cake powder are respectively 0.5% and 1.5%, yeast juice 0.05%～0.10%.
2. after forage is prepared wheat straw raw material carried out removal of impurities and remove slag, manage, cut into the long segment of 3～5c m, be beneficial to microorganism absorption, infect.
3. dosing inoculation is that the ratio of 1: 2 ± 0.2. adds running water and regulates water temperature to 34 ℃ ± 1 ℃ to the dosing bucket and with steam in forage to bacteria suspension, add 0.1% agricultural composite fertilizer again, stirring and evenly mixing when adding the activation bacteria suspension, then the bacteria suspension for preparing evenly is sprayed onto on the forage, the round loading density is 100kg/m
3± 20kg/m
3, the forage moisture content reaches 69% ± 1%, bacteria containing amount is 10
10Cfu/kg, last, drop removes surplus liquid.
4. wet fermentation places postvaccinal forage the condition bottom fermentation 7.0h ± 0.5h of 34 ℃ ± 3 ℃ of temperature, relative humidity 85% ± 5%; The sign that fermentation is finished is that forage is softening, the surface is blue look, rubs with hand and is separated into filament.
5. the washing of fermentation forage is injected 80 ℃ ± 5 ℃ warm water and circulation flushing forage 15min～30min with dehydration in the ratio of 2～3 times of forage dry weights in the container that forage is housed, then, adopt Water Extraction Machinery to dewater, perhaps use the air pressure of 0.2mpa to extrude the forage free water, making fermentation forage moisture content is 60% ± 5%, and forage dry weight yield is 80% ± 2%.
6. shelling is 2% NaOH solution to the forage spray concentration after dewatering by the ratio of forage dry weight 3.0% ± 0.3%, make the forage moisture content reach 210%～230%, under vapour pressure in container≤0.15mpa condition, boiling 2.0h ± 0.5h, finally make the residual alkali concn of slurry between 0.6g/l～2.0g/l, the K value is between 10.5～13.8.
7. making beating half stuff technological parameter is the heavy 8.0kg～9.0kg of stone roller of cutter under the beater, beating time 40min ± 10min.
8. screening the pulp scalping aperture is 6mm, slagging-off rate≤0.5%; The dusting cover aperture is 2.2mm, slagging-off rate≤5.0%.
9. bleach amount of slurry 800kg/ groove, bleaching liquor consumption 10%～12%, whiteness 69.2%～74.8%.
10. defibrination time 35min, beating degree is more than 55.
(2) experimental size and place
It is 1～5kg/ time in batches that present embodiment is handled wheat straw, repeats 4 times.Experiment place: Hemp Inst., China Academy of Agricultural Sciences's pilot plant.
(3) implementation result
1. this invention has characteristics such as high yield, high-quality, low consumption, low pollution.Compare with the conventional chemical pulping process, 1. the caustic soda consumption reduces more than 70%; 2. power consumption is saved more than 20%; 3. screened yield improves 5 percentage points; 4. industrial comprehensive wastewater water quality is single, directly enters biological oxidation and handles and be easy to up to standardly, and cost of sewage disposal saves about 60%.
2. detect through Hunan Province papermaking product quality supervision and test granting station, the index of quality of the wheat straw paper pulp that the employing technical solution of the present invention is produced is better than traditional chemical method slurrying quality near the hardwood pulp quality.Quantitative 47.4g/m
2The paper index be: tightness is 0.48g/cm
3, burst index is 3.69kpa.m
2/ g, tear index are 3.16mN.m
2/ g, breaking length are 7.1km.
Claims (6)
1. efficient low-consume clean type wheat straw bio-pulping process, technical scheme comprise the washing of high-effect bacterial activation, raw material preparation, dosing inoculation, wet fermentation, fermentation forage and dehydration, diluted alkaline shelling, making beating, screening the pulp, bleaching, defibrination etc.; Its technical characterictic is that " high-effect bacterial activation " is to get the vacuum-packed CXJZ95-198 high-effect bacterial of preserving, inoculum concentration access by 500ml/ ton forage fills in the air agitation fermentation tank of konjaku-soya-bean cake culture medium, at 35 ℃ ± 1 ℃, stirring frequency 200rpm～380rpm, throughput 30l/m
3Min～300l/m
3Cultivate 5～6hr under the condition of min, jar internal pressure 0.05mpa, obtain the activation bacteria suspension; The prescription of konjaku-soya-bean cake culture medium was that 200 purpose konjaku flours and soybean cake powder are respectively 0.5% and 1.5%, yeast juice 0.05%～0.10%.
2. a kind of efficient low-consume clean type wheat straw bio-pulping process as claimed in claim 1, its technical characterictic is that " dosing inoculation " is is that 1: 2 ± 0.2 ratio adds running water and regulates water temperature to 34 ℃ ± 1 ℃ to the dosing bucket and with steam in forage to bacteria suspension, add 0.1% agricultural composite fertilizer again, stirring and evenly mixing when adding the activation bacteria suspension, then the bacteria suspension for preparing evenly is sprayed onto on the forage, the round loading density is 100kg/m
3± 20kg/m
3, the forage moisture content reaches 69% ± 1%, bacteria containing amount is 10
10Cfu/kg, last, drop removes surplus liquid.
3. a kind of efficient low-consume clean type wheat straw bio-pulping process as claimed in claim 1, its technical characterictic are that " wet fermentation " is the condition bottom fermentation 7.0h ± 0.5h that postvaccinal forage is placed 34 ℃ ± 3 ℃ of temperature, relative humidity 85% ± 5%; The sign that fermentation is finished is that forage is softening, the surface is blue look, rubs with hand and is separated into filament.
4. a kind of efficient low-consume clean type wheat straw bio-pulping process as claimed in claim 1, its technical characterictic is that " washing and the dehydration of fermentation forage " is to inject 80 ℃ ± 5 ℃ warm water and circulation flushing forage 15min～30min in the container that forage is housed in the ratio of 2～3 times of forage dry weights, then, adopt Water Extraction Machinery to dewater, perhaps use the air pressure of 0.2mpa to extrude the forage free water, making fermentation forage moisture content is 60% ± 5%, and forage dry weight yield is 80% ± 2%.
5. a kind of efficient low-consume clean type wheat straw bio-pulping process as claimed in claim 1, its technical characterictic " diluted alkaline shelling " is 2% NaOH solution in the ratio of forage dry weight 3.0% ± 0.3% forage spray concentration after to dehydration, make the forage moisture content reach 210%～230%, under vapour pressure in container≤0.15mpa condition, boiling 2.0h ± 0.5h, perhaps in container under vapour pressure 〉=0.55mpa condition, boiling 1.5h ± 0.5h, finally make the residual alkali concn of slurry between 0.6g/l～2.0g/l, the K value is between 10.5～13.8.
6. a kind of efficient low-consume clean type wheat straw bio-pulping process as claimed in claim 1, its technical characterictic are that " making beating " is the heavy 8.0kg～9.0kg of stone roller of cutter under the beater, beating time 40min ± 10min.
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| CN 200410046963 CN1779068A (en) | 2004-11-23 | 2004-11-23 | High-effective and low-consumption cleaning biological pulp-making process from wheatgrass |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109811580A (en) * | 2019-03-13 | 2019-05-28 | 内蒙古科技大学 | Using peanut shell, reed as biological paper pulp of raw material and its preparation method and application |
| CN110577917A (en) * | 2019-09-30 | 2019-12-17 | 广东普洛宇飞生物科技有限公司 | straw biodegradation composite microbial inoculum and application thereof |
| CN111424448A (en) * | 2020-03-30 | 2020-07-17 | 长沙瑞福尼新材料科技有限公司 | Preparation process of leaf biomechanical pulp |
| CN113026409A (en) * | 2021-03-29 | 2021-06-25 | 边静 | Method for preparing biological sulfur-free semi-chemical pulp by using palm fibers |
-
2004
- 2004-11-23 CN CN 200410046963 patent/CN1779068A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109811580A (en) * | 2019-03-13 | 2019-05-28 | 内蒙古科技大学 | Using peanut shell, reed as biological paper pulp of raw material and its preparation method and application |
| CN110577917A (en) * | 2019-09-30 | 2019-12-17 | 广东普洛宇飞生物科技有限公司 | straw biodegradation composite microbial inoculum and application thereof |
| CN111424448A (en) * | 2020-03-30 | 2020-07-17 | 长沙瑞福尼新材料科技有限公司 | Preparation process of leaf biomechanical pulp |
| CN113026409A (en) * | 2021-03-29 | 2021-06-25 | 边静 | Method for preparing biological sulfur-free semi-chemical pulp by using palm fibers |
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