CN101497833A - Production process for producing biobase natural gas with coproduction of lignose and microcrystalline cellulose from bamboo processing wastes - Google Patents
Production process for producing biobase natural gas with coproduction of lignose and microcrystalline cellulose from bamboo processing wastes Download PDFInfo
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- 241001330002 Bambuseae Species 0.000 title claims abstract description 99
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- 239000011425 bamboo Substances 0.000 title claims abstract description 99
- 229920000168 Microcrystalline cellulose Polymers 0.000 title claims abstract description 38
- 235000019813 microcrystalline cellulose Nutrition 0.000 title claims abstract description 38
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- 229940016286 microcrystalline cellulose Drugs 0.000 title claims abstract description 38
- 239000002699 waste material Substances 0.000 title claims abstract description 35
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 239000003345 natural gas Substances 0.000 title abstract description 6
- 238000000855 fermentation Methods 0.000 claims abstract description 16
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000005903 acid hydrolysis reaction Methods 0.000 claims abstract description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 66
- 238000000034 method Methods 0.000 claims description 28
- 239000007789 gas Substances 0.000 claims description 25
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 20
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 15
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- 238000004062 sedimentation Methods 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- 238000004061 bleaching Methods 0.000 claims description 4
- 239000007844 bleaching agent Substances 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 239000002360 explosive Substances 0.000 claims description 4
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- 238000006460 hydrolysis reaction Methods 0.000 claims description 3
- 238000002203 pretreatment Methods 0.000 claims description 3
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- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 2
- 239000000460 chlorine Substances 0.000 claims description 2
- 229910052801 chlorine Inorganic materials 0.000 claims description 2
- 238000005474 detonation Methods 0.000 claims description 2
- IGUXCTSQIGAGSV-UHFFFAOYSA-K indium(iii) hydroxide Chemical compound [OH-].[OH-].[OH-].[In+3] IGUXCTSQIGAGSV-UHFFFAOYSA-K 0.000 claims 2
- 239000000463 material Substances 0.000 abstract description 10
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- 235000001674 Agaricus brunnescens Nutrition 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
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- 239000001257 hydrogen Substances 0.000 description 2
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- PTHCMJGKKRQCBF-UHFFFAOYSA-N Cellulose, microcrystalline Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC)C(CO)O1 PTHCMJGKKRQCBF-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
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- 238000012676 equilibrium polymerization Methods 0.000 description 1
- 238000012262 fermentative production Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000001963 growth medium Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000013520 petroleum-based product Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
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- 238000000197 pyrolysis Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000004627 regenerated cellulose Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 239000000052 vinegar Substances 0.000 description 1
- 235000021419 vinegar Nutrition 0.000 description 1
- -1 xylogen Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Preparation Of Compounds By Using Micro-Organisms (AREA)
Abstract
The invention relates to a production process for producing biomass based natural gas, lignose and microcrystalline cellulose by utilizing bamboo-curing waste, which solves the problem that the bamboo-curing waste is utilized economically and effectively. The production process comprises the following steps: performing steam exploded pretreatment to the bamboo-curing waste, lixiviating and separating the steam exploded materials by water, producing marsh by the anaerobic fermentation of liquid phase materials, obtaining bamboo cellulose filter residue and black liquid by the alkali treatment of solid phase materials, separating the black liquid from the lignose, and obtaining the microcrystalline cellulose by the acid hydrolysis of the bamboo cellulose filter residue. The production process has high transition heat energy and can realize energy regeneration of the marsh; the joint lignose and microcrystalline cellulose realizes the energy regeneration utilization of the waste. The production process belongs to a closed circulating system which has high economic benefit and environment-protection without pollution.
Description
Technical field
The present invention relates to utilize the processing method of biomaterial production biomass energy and production macromolecular material.
Background technology
There is advantageous bamboo timber resource in China, and bamboo grove area, living bamboo accumulation and bamboo annual production all occupy prostatitis, the world.There are about 5,000,000 hm of bamboo grove area in China
2, kind surplus in the of 500.The bamboo grove main producing region is distributed in provinces and regions such as Hunan, Fujian, Jiangxi, Zhejiang, Anhui, Guangdong, Guangxi.By 2000, the bamboo grove area of China reached 5,000,000 hm
2, total accumulation is 1.3 hundred million tons.Plan China in 2010 and also will increase bamboo grove area 1,200,000 hm newly
2, then the bamboo grove area of China will be above 6,000,000 hm
2
At the beginning of the eighties, in order to alleviate the contradiction of China's timber supply and demand anxiety, people have proposed the imagination of " wood substituted by bamboo ", have from then on begun China's bamboo wood industrialized utilization new developing period.Through 20 years, grow out of nothing and expand from small to large for the bamboo wood industrialized utilization scale of China, develops rapidly.Today, the bamboo processing industry of China became a new industry in the national economy, and various bamboo wood products are just being brought into play more and more important effect in the development of the national economy and people's life.
The purposes of bamboo processing is more, consumes maximum as products such as bamboo plywood, bamboo fiberboard, bamboo veneer sheets.These products are no more than 30% to the mao bamboon instream factor.Also be to have 70% residuum to can not get sufficient utilization in the bamboo wood.The biomass that annual only Lu'an City is felled mao bamboon and processing on the spot can reach about 320,000 tons.These 320,000 tons of bamboo processing produce the bamboo processing wastes of 70-80%, ten thousand tons of about 22-25.These wastes fail to obtain due utilization, fail to produce due value.As seen, the stock number of the bamboo processing wastes of Lu'an City is very big.
The tankage of bamboo processing mainly are bamboo branch, ring, bamboo spring, bamboo bits etc.The main component of these materials is Mierocrystalline cellulose, hemicellulose and xylogen.Have at present tankage such as bamboo branch, ring, bamboo springs after the certain processing treatment of process, go out series product such as bamboo charcoal, bamboo absorbent charcoal and bamboo vinegar liquid by explained hereafter such as charing, activation, destructive distillation; Fine bamboo strip, bamboo bits etc. can be used to make bamboo fiber board products such as medium density fibre board (MDF), shaving board and bamboo crushed aggregates composition board; The bamboo bits add certain material can directly be processed into the culture medium of edible mushrooms, is used for the production of edible mushrooms.
But, the surrogate burning boiler that present most of bamboo processing wastes still acts as a fuel, its calorific value is low, dust is big, again environment is produced new pollution.
Find out by above-mentioned analysis, the utilization ratio of bamboo processing wastes is lower, utilize level lower, Shang Weiyou utilizes bamboo processing wastes to produce the report of bio-gas, does not also see bamboo processing wastes is produced xylogen and the comprehensive utilization report that is developed to the microcrystalline cellulose cellulose product.
Summary of the invention
Utilize problem for the economical and effective that solves bamboo processing wastes, the invention provides that a kind of energy consumption is low, pollution-free, the bamboo processing wastes that utilizes of less investment produces the production technique of bio-gas, xylogen, Microcrystalline Cellulose.
The technical scheme that realizes above-mentioned purpose is such, and the production technique of utilizing bamboo processing wastes to produce bio-gas, xylogen and Microcrystalline Cellulose may further comprise the steps:
Described bamboo processing wastes is meant: the tankage when being processed into various goods such as mao bamboon, garden bamboo, comprise bamboo branch, ring, the leaf of bamboo, bamboo spring, bamboo bits, bamboo shaving, bamboo sawdust etc., the main component of these tankage is Mierocrystalline cellulose, hemicellulose and xylogen, and its moisture content is 5-50%.
A, the quick-fried pre-treatment of pulse vapour
Above-mentioned bamboo processing wastes is filled the blast chamber of Steam explosive machine, the quick-fried condition of pulse vapour: vapour detonation pressure power 1.5MP-4.0MP, the dwell time is 0.5min-9min, the quick-fried thing of vapour; After vapour is quick-fried, have the hemicellulose more than 70% to be hydrolyzed, most of Mierocrystalline cellulose is separated and expanded, and this pretreated technology is extremely important, for High-efficient Production bio-gas and coproduction xylogen and Microcrystalline Cellulose are had laid a good foundation.
B, the quick-fried thing lixiviate of vapour separate
By the quick-fried thing of vapour: water=1: 5～10 weight ratios add water and fully stir in vapour waterfall thing, leach the water solubles in the quick-fried thing of vapour, separate extractive substance through methods such as centrifugal or squeezings, solid formation and liquid phase thing.
C, liquid phase thing fermentation methane production
(1) gained liquid phase thing being regulated its pH value with alkali lye is 6.5-7.0, pump into anaerobic fermentation tank by strainer, and add the active cripple of liquid phase thing weight 10%-20%, carry out anaerobically fermenting, the anaerobic fermentation tank pH value is controlled between 6.5-7.5, and temperature is 30-40 ℃; Through beginning to produce biogas in 12 hours; The component of the biogas that produces is the methane of 65%-75%, the carbonic acid gas of 20%-25%, and all the other are other impurity such as hydrogen, hydrogen sulfide;
(2) biogas desulfurization
Adopt natural-gas desulfurizer to carry out desulfurization biogas that aforesaid method produces, get the desulfurization thing;
(3) desulfurization thing compression separating natural gas
With gained desulfurization thing input intermediate pressure compressor, under pressure 7-8Mpa condition, make co 2 liquefaction, this moment, carbonic acid gas separated automatically with methane, get bio-gas, the technical indicator of gained bio-gas meets GB17820-1999 Sweet natural gas technical indicator.
D, solid formation alkaline purification
Add 3-5 alkali lye doubly in described solid formation, 50 ℃-100 ℃ temperature boiling, the time is 0.5-3.5 hour, gets cooking material; Centrifugal or squeezing separates cooking material, gets bamboo cellulose filter residue and black liquor; Described concentration of lye is the 1%-15% sodium hydroxide solution;
E, from black liquor separating lignin
First method: film is handled separating lignin
Membrane technique is handled alkali lye (black liquor) and is extracted xylogen: adopt membrane technology that xylogen, sodium hydroxide (NaOH) and other composition water liquid three are separated, xylogen part spraying drying is got xylogen, cycling and reutilization behind the alkali lye membrane concentration, the water liquid of other composition can be used the fermentative production Sweet natural gas.
F, acid hydrolysis obtain Microcrystalline Cellulose: the solid formation (alkaline residue that obtains in the D step, be bamboo cellulose) with the hydrochloric acid of 3-10 times of volume 5%-10% under 50 ℃ of-100 ℃ of conditions hydrolysis 1-5 hour, after its cellulose hydrolysis reaches the equilibrium polymerization degree, can separate obtaining Microcrystalline Cellulose crude product and acid solution by methods such as centrifugal, filtrations.Acid solution reclaims through membrane concentration, reaches recycle.
G, bleaching: the Microcrystalline Cellulose crude product that acid hydrolysis is obtained is through after the abundant washing, extraordinarily go into the hydrogen peroxide of 2%-5% according to the 1-5 of Microcrystalline Cellulose crude product volume, bleach for temperature 30-80 ℃, perhaps the chlorine bleach liquor with 5%-10% bleaches at 30-60 ℃, detect with the whiteness instrument, reach more than 90 up to whiteness, separated and collected promptly obtains the finished product Microcrystalline Cellulose.
Described bamboo processing wastes is: the tankage when being processed into various goods such as mao bamboon, garden bamboo, comprise bamboo branch, ring, the leaf of bamboo, bamboo spring, bamboo bits, bamboo shaving, bamboo sawdust, and its moisture content is 5-50%.
Other two kinds of methods of separating lignin are as follows from black liquor:
Second method: acetate method precipitation xylogen.The acetic acid solution that in alkali lye (black liquor), the adds 5%-10% wherein sodium hydroxide that neutralizes, regulating with the 5%-10% acetic acid solution makes the pH value of solution value go out xylogen in the sedimentation of 1.5-5.5 scope again, settled lignin separation is come out, and raffinate is used for fermentation and produces bio-gas.
The third method: salt acid system precipitation xylogen.The hydrochloric acid soln that in alkali lye (black liquor), the adds 2%-10% wherein sodium hydroxide that neutralizes, regulating with the hydrochloric acid soln of 2%-10% makes the pH value of solution value go out xylogen in the sedimentation of 1.5-5.5 scope again, settled lignin separation is come out, and raffinate is used for fermentation and produces bio-gas.
Useful technique effect of the present invention is embodied in the following aspects:
1, the bamboo processing wastes that will be difficult to degrade changes into bio-gas, and product such as coproduction bamboo lignin, Microcrystalline Cellulose, the operational path of having explored more effective more economical practicality for the resource utilization and the high-valued comprehensive utilization of bamboo processing wastes.Whole technology does not have waste liquid and environmental pollution deposits yields, belongs to " green " production technique truly.
2, adopted the quick-fried technology of vapour, environmental protection, energy-conservation, soaking-free, boiling, need not add any chemical reagent, can bamboo processing wastes is quick-fried broken, thereby reach the ideal pretreating effect, realization is carried out the purpose of producing methane through anaerobic fermentation with bamboo processing wastes, guarantees for the coproduction related products provides proper raw material simultaneously.
3, adopt the two-phase anaerobic fermentation technology, make the unit volume factor of created gase be largely increased.Make that whole fermentation system is continuous, steady-state operation, realize industrialized continuous and stable product biogas, thereby can realize the recovery energy of biogas.
4, from bamboo processing wastes, produce xylogen and Microcrystalline Cellulose, realized the changing waste into resources utilization.Alpha cellulose content is very high in the bamboo fibers, can be used as processing raw material of bamboo regenerated cellulose, carboxymethyl cellulose, Microcrystalline Cellulose, and purposes is very extensive.The application of the then alternative petroleum-based products of xylogen of producing in rubber etc.
5, application of the present invention not only has very big social benefit, also can produce very big economic benefit, makes enterprise can produce economic benefit in the conversion process of biomass energy, realizes Sustainable development.What this point was difficult to do in present a lot of biomass energy manufacturing enterprise arrives.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described by embodiment.
Embodiment 1:
Referring to Fig. 1, the production technique of utilizing bamboo processing wastes to produce bio-gas, xylogen and Microcrystalline Cellulose comprises following operation steps:
A, the quick-fried pre-treatment of vapour
Get the blast chamber that Steam explosive machine is filled in the gradation of 100kg bamboo shaving, the quick-fried condition of pulse vapour: pressurize 9min under the pressure of 1.5MPa gets the quick-fried thing of vapour;
B, the quick-fried thing lixiviate of vapour separate
Press the quick-fried thing of vapour: the weight ratio of water=1: 5, in vapour waterfall thing, add entry and fully stir, obtain solid formation and liquid phase thing through centrifugal or squeezing separation;
C, liquid phase thing adopt producing methane through anaerobic fermentation:
Regulating its pH value with alkali lye is to pump into 3 after 7.0 respectively to produce methane tank, adds 20% cripple again, carries out anaerobically fermenting.The 2nd day beginning aerogenesis, initial stage daily output tolerance 50-60L increases later on day by day, during the peak every day aerogenesis 1.2-2.0m3, reduce day by day then.During aerogenesis, detect the potential of hydrogen of aerogenesis jar feed liquid every day, when its pH value greater than 7.5 the time, just replenish and pump into acid solution, make its pH drop to 6.5, be convenient to the continuous aerogenesis activity of methanogen.Produced acid through 10 days and finish, aerogenesis finished in about 42 days, the about 18.6m of total gas production
3The composition methane of gas accounts for 68.1%, carbonic acid gas accounts for 27.4%, and all the other are foreign gas.
D, solid formation alkaline purification
Sodium hydroxide (NaOH) alkali lye that in described solid formation, adds 3 times, concentration is 15%, in 50 ℃ of boilings of temperature, the time is 0.5 hour, gets the soda boiling thing; Centrifugation soda boiling thing in cooling back obtains about 500kg black liquor and about 210kg bamboo cellulose filter residue.
E, from black liquor separating lignin
Black liquor with periosteum filtering suspended substance after again with receiving membrane concentration, remove moisture content and alkaline matter, the dope that obtains carries out spraying drying, isolates xylogen 17kg, the alkali in the black liquor concentrate to be recycled.
F, acid hydrolysis get Microcrystalline Cellulose
Get bamboo cellulose filter residue 100kg, add the hydrochloric acid of 3 times of volumes 10%, under 100 ℃ of conditions of temperature, boiled 1 hour, again by centrifugal, filtration, separate obtaining Microcrystalline Cellulose crude product and acid solution, acid solution recycles and reuses with membrane concentration.
G, bleaching
The Microcrystalline Cellulose crude product is bleached at temperature 30-80 ℃ with the hydrogen peroxide of 2%-5%, detects with the whiteness instrument, and when whiteness reaches more than 90, separated and collected promptly obtains finished product Microcrystalline Cellulose 55kg.
Embodiment 2:
Get the blast chamber that Steam explosive machine is filled in 100kg bamboo bits or the gradation of bamboo sawdust, behind pressurize 0.5min (30s) under the pressure of 4.0MPa, it is quick-fried to carry out pulse vapour, the quick-fried thing of vapour; Press the quick-fried thing of vapour: the weight ratio of water=1: 10, in vapour waterfall thing, add entry and fully stir, obtain solid formation and liquid phase thing through centrifugal or squeezing separation.The liquid phase thing is used for anaerobically fermenting and produces biogas with embodiment 1.Solid formation adds the sodium hydroxide solution of 3 times of volume mass marks 1%, boils 3.5 hours 100 ℃ of temperature, gets cooking material; Centrifugation obtains about 500kg black liquor and about 210kg bamboo cellulose filter residue behind the cooling cooking material.Black liquor with periosteum filtering suspended substance after again with receiving membrane concentration, remove moisture content and alkaline matter, the dope that obtains carries out spraying drying, isolates xylogen 17kg, the alkali in the black liquor concentrate to be recycled.Get bamboo cellulose filter residue 100kg, add the hydrochloric acid of 10 times of volumes 5%, under 50 ℃ of conditions of temperature, boiled 5 hours, again by centrifugal, filtration, separate obtaining Microcrystalline Cellulose crude product and acid solution, acid solution recycles and reuses with membrane concentration.The Microcrystalline Cellulose crude product is bleached at 30-60 ℃ with the clorox of 5%-10%, detects with the whiteness instrument, and when whiteness reaches more than 90, separated and collected promptly obtains finished product Microcrystalline Cellulose 51kg.
Embodiment 3:
Technology and method are with embodiment 1, what just adopt during separating lignin in " black liquor " is acetate neutral method: the acetic acid solution of the adding 5%-10% wherein sodium hydroxide that neutralizes in black liquor, regulating with the 5-10% acetic acid solution makes the pH value of solution value go out xylogen in the sedimentation of 1.5-5.5 scope again, settled lignin separation is come out, and raffinate is used for fermentation and produces bio-gas.
Embodiment 4:
Technology and method are with embodiment 1, what just adopt during separating lignin in " black liquor " is the hydrochloric acid neutralization method: the hydrochloric acid soln of the adding 2-10% wherein sodium hydroxide that neutralizes in black liquor, regulating with the hydrochloric acid soln of 2-10% makes the pH value of solution value go out xylogen in the sedimentation of 1.5-5.5 scope again, settled lignin separation is come out, and raffinate is used for fermentation and produces bio-gas.
Claims (6)
1, produce the production technique of bio-gas coproduction xylogen, Microcrystalline Cellulose with bamboo processing wastes, it is characterized in that comprising following operation steps:
A, the quick-fried pre-treatment of vapour
Get bamboo processing wastes and fill the blast chamber of Steam explosive machine, the quick-fried condition of vapour: vapour detonation pressure power is 1.5-4.0MPa, and the dwell time is 0.5min-9min, gets the quick-fried thing of vapour;
B, the quick-fried thing lixiviate of vapour separate
Press the quick-fried thing of vapour: the weight ratio of water=1: 5～10, in vapour waterfall thing, add entry and fully stir, obtain solid formation and liquid phase thing through centrifugal or squeezing separation;
C, liquid phase thing are used for producing methane through anaerobic fermentation;
D, solid formation alkaline purification
Add 3-5 alkali lye doubly in described solid formation, 50 ℃-100 ℃ temperature boiling, the time is 0.5-3.5 hour, gets the soda boiling thing; Centrifugal or squeezing separates the soda boiling thing and gets bamboo cellulose filter residue and black liquor; Described concentration of lye is 1%-15%;
E, from black liquor separating lignin
Adopt film to handle xylogen, sodium hydroxide and raffinate are separated, xylogen part spraying drying is got xylogen, raffinate is used for fermentation and produces bio-gas;
F, acid hydrolysis get Microcrystalline Cellulose
With the bamboo cellulose that obtains in the D step hydrochloric acid with 3-10 times of volume 5%-10%, under 50 ℃ of-100 ℃ of conditions of temperature hydrolysis 1-5 hour, again by centrifugal, filter, separate obtaining Microcrystalline Cellulose crude product and acid solution;
G, bleaching
Washing Microcrystalline Cellulose crude product is extraordinarily gone into the hydrogen peroxide of 2%-5% according to the 1-5 of Microcrystalline Cellulose crude product volume, bleaches for temperature 30-80 ℃, detects with the whiteness instrument, reaches more than 90 up to whiteness, and separated and collected promptly obtains the finished product Microcrystalline Cellulose.
2, production technique of producing bio-gas coproduction xylogen, Microcrystalline Cellulose with bamboo processing wastes according to claim 1, it is characterized in that: described bamboo processing wastes is: the tankage when being processed into various goods such as mao bamboon, garden bamboo, comprise bamboo branch, ring, the leaf of bamboo, bamboo spring, bamboo bits, bamboo shaving, bamboo sawdust, its moisture content is 5-50%.
3, production technique of producing bio-gas coproduction xylogen, Microcrystalline Cellulose with bamboo processing wastes according to claim 1, it is characterized in that: described alkali lye is the 1%-15% sodium hydroxide solution.
4, production technique of producing bio-gas coproduction xylogen, Microcrystalline Cellulose with bamboo processing wastes according to claim 1, it is characterized in that the operation of separating lignin from black liquor: get the acetic acid solution that D step black liquor adds 5-10%, in and sodium hydroxide, and regulate its pH value, make the pH value in the 1.5-5.5 scope, the xylogen sedimentation, separate xylogen and raffinate, raffinate is used for fermentation and produces bio-gas.
5, production technique of producing bio-gas coproduction xylogen, Microcrystalline Cellulose with bamboo processing wastes according to claim 1, it is characterized in that the operation of separating lignin from black liquor: get the hydrochloric acid soln that D step black liquor adds 2%-10%, in and sodium hydroxide, and regulate its pH value, make the pH value of solution value in the 1.5-5.5 scope, the xylogen sedimentation, separate xylogen and raffinate, raffinate is used for fermentation and produces bio-gas.
6, production technique of producing bio-gas coproduction xylogen, Microcrystalline Cellulose with bamboo processing wastes according to claim 1, it is characterized in that described bleaching operation: washing Microcrystalline Cellulose crude product, extraordinarily go into the chlorine bleach liquor of 5%-10% according to the 1-5 of its volume, bleach for temperature 30-60 ℃, detect with the whiteness instrument, reach more than 90 up to whiteness, separated and collected promptly obtains the finished product Microcrystalline Cellulose.
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