CN102321676A - Biogas engineering two gas one fertile complex method - Google Patents
Biogas engineering two gas one fertile complex method Download PDFInfo
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- CN102321676A CN102321676A CN201110263903A CN201110263903A CN102321676A CN 102321676 A CN102321676 A CN 102321676A CN 201110263903 A CN201110263903 A CN 201110263903A CN 201110263903 A CN201110263903 A CN 201110263903A CN 102321676 A CN102321676 A CN 102321676A
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
- C12M29/14—Pressurized fluid
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- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M47/00—Means for after-treatment of the produced biomass or of the fermentation or metabolic products, e.g. storage of biomass
- C12M47/10—Separation or concentration of fermentation products
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M47/00—Means for after-treatment of the produced biomass or of the fermentation or metabolic products, e.g. storage of biomass
- C12M47/18—Gas cleaning, e.g. scrubbers; Separation of different gases
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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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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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Abstract
a kind of biogas engineering two gas one fertile complex method, it is undertaken by following step: the first step, produce biogas and natural pond fertilizer, biogas is through in the pipeline input storage tank that is connected with marsh-gas fermentation tank top; Second step, the biogas in the storage tank after pressurization successively through desulfurizer and dewatering unit carry out desulfurization, dehydration obtains the biogas that staple is methane and carbonic acid gas, behind the separation purifying plant, obtains methane and carbonic acid gas respectively again.The invention solves the problem that existing biogas engineering low economic value and low social value are utilized, and obtain high purity methane, its methane content by
60%
About be promoted to
93%
More than, calorific value is by original
21542kJ/m
3
Rise to
36417kJ/m
3
And obtained the higher industrial carbonic acid gas of purity.This method has not only improved the calorific value of biogas greatly, and makes carbonic acid gas also obtain utilization, has realized that two value of the common utilization of biogas economy and social value utilized pattern, has broad application prospects.
Description
Technical field
the present invention relates to biogas and produce methane, carbonic acid gas, fertilizer technology field, natural pond, are a kind of biogas engineering two gas one fertile complex methods.
Background technology
The construction amount and the recoverable amount of
present Chinese biogas engineering constantly increase; Constantly widen in the biogas field of using; The kind and the quantity of biogas heat energy utilization equipment also are on the increase; Such as production fields such as marsh gas power generation, methane boiler, drying, baking, greenhouse, hatching and sericultures, and progressively to the stdn of product, seriation and batch production development.Therefore, biogas is purified, make the quality of biogas reach request for utilization, very necessary.
Contain 50% to 70% methane in the biogas that
general normal and stable fermentation produces, 30% to 40% carbonic acid gas in addition, also contains gases such as a spot of carbon monoxide, water, hydrogen, hydrogen sulfide, oxygen and nitrogen.The correlative study test shows: methane content is respectively 50%, 60%, 70% in the biogas, and carbon dioxide content should be mutually at 50%, 40%, 30% o'clock, and the calorific value of biogas is followed successively by: 17937kJ/m 3 , 21542kJ/m 3 , 25111kJ/m 3 , when promptly the content of carbonic acid gas was higher in the biogas, its calorific value obviously reduced, the adversely affecting its combustion characteristic; Hydrogen sulfide in the biogas can be dissolved in water and form acid very strong vaporific hydrogen sulfide solution, and it exists can corrode biogas handling equipment and combustion equipment; Can dissolved hydrogen sulfide when the water vapour in the biogas runs up to a certain degree and corrosion pipeline, and in biogas during pressurized storages of isolated methane, condensed water can blocking pipe freezing storage tank also.
still; China's biogas that most of biogas engineering produces is only through promptly coming into operation after simple desulfurization, dehydration, the purifying treatment; Handle that back methane purity is not high, calorific value is on the low side, and the carbonic acid gas that will have an essential industry purposes directly enters atmosphere.The low heat value utilization of methane and a large amount of wastes of carbonic acid gas cause the utilization of biogas to be in the low economic value stage, and the environmental pollution that carbonic acid gas directly discharges generation causes the utilization of biogas to be in the low social value stage.
Summary of the invention
the invention provides a kind of biogas engineering two gas one fertile complex method; It has overcome the deficiency of prior art; Solved that existing biogas calorific value is on the low side, the problem of a large amount of wastes of carbonic acid gas; It utilizes biogas to obtain methane, carbonic acid gas, natural pond fertilizer respectively, thus the effective utilization that has improved biogas engineering.
technical scheme of the present invention realizes like this: a kind of biogas engineering two gas one fertile complex method; It is undertaken by following step: the first step; Biogas raw material anaerobically fermenting in marsh-gas fermentation tank; It is fertile to produce biogas and natural pond, and natural pond fertilizer is discharged from the marsh-gas fermentation tank bottom, and biogas is through in the pipeline input storage tank that is connected with marsh-gas fermentation tank top; Second step, the biogas in the storage tank after pressurization successively through desulfurizer and dewatering unit carry out desulfurization, dehydration obtains the biogas that staple is methane and carbonic acid gas, behind the separation purifying plant, obtains methane and carbonic acid gas respectively again.
Do further to optimize or/and select in the face of technique scheme down:
above-mentioned anaerobically fermenting adopts complete hybrid anaerobic fermentation jar, in jar whisking appliance is set, and in jar well heater is set.
The thermal source that heats of
above-mentioned well heater is a high temperature circulation water, and high temperature circulation water is from gas fired-boiler, and boiler adopts gas fired-boiler, and fuel is biogas or methane.
above-mentioned desulfurizer adopts the alternating temperature absorption method; Sorbent material is a gac; The biogas after the desulfurization is adopted in desorb, when being heated to 160 ℃ to 200 ℃, removes reproducing adsorbent, and regenerated methane returns desulfurizer and circulates once more; Regenerated methane adopts the flame furnace direct heating, and flame furnace fuel is biogas or methane.
above-mentioned dewatering unit adopts the alternating temperature absorption method; Sorbent material is a silica gel; The dry biogas after the dehydration is adopted in desorb, after compressor pressurizes, flame furnace heating, removes the siccative of regenerating, and this part dry biogas reflux dewatering device portal again circulates once more.
above-mentioned separation purifying plant adopts pressure swing adsorption process, and sorbent material is a molecular sieve, and two groups of Roots vaccum pump vacuum pumping methods are adopted in desorb.
The carbonic acid gas that
above-mentioned separation purifying plant obtains is purified through absorption process.
The invention solves the problem that existing biogas engineering low economic value and low social value are utilized, obtain high purity methane after purifying through this method, its methane content is promoted to more than 93% by about 60%, and calorific value is by original 21542kJ/m
3
Rise to 36417 kJ/m
3
And obtained the higher industrial carbonic acid gas of purity.This method has not only improved the calorific value of biogas greatly, and makes carbonic acid gas also obtain utilization, has realized that two value of the common utilization of biogas economy and social value utilized pattern, has broad application prospects.
Description of drawings
accompanying drawing 1 is the schematic flow sheet of most preferred embodiment of the present invention.
accompanying drawing 2 is the schematic flow sheet of absorption process purifying carbon dioxide of the present invention.
Encode in
accompanying drawing and be respectively: 1 is marsh-gas fermentation tank, and 2 is the biogas storage tank, and 3 is compressor, and 4 is desulfurizer, and 5 is well heater; 6 is dewatering unit, and 7 for separating purifying plant, and 8 is vacuum pump, and 9 is analysis tester, and 10 is the stink adder; 11 is condensing surface, and 12 is compressor unit, and 13 is absorption process purifying carbon dioxide method, and 14 is gas distributing system, and 15 is high-pressure gas cylinder; 16 is the carbonic acid gas pipeline, and 17 is the vehicle fuel pipeline, and 18 is Sweet natural gas user pipeline, and 19 is the fertile pipeline in natural pond; 20 is the methane pipeline, and 21 is source line, and 22 is the absorption tower, and 23 is water cooler; 24 is interchanger, and 25 is desorption tower, and 26 is the carbonic acid gas outlet line, and 27 is high temperature circulation water.
Embodiment
the present invention does not receive the restriction of following embodiment, can confirm concrete embodiment according to the technical scheme and the practical situation of the invention described above.Below in conjunction with specific embodiment the present invention is done and to further describe.
embodiment 1; Shown in accompanying drawing 1; This biogas engineering two gas one fertile complex method is undertaken by following step: the first step, and biogas raw material anaerobically fermenting in marsh-gas fermentation tank produces biogas and natural pond fertilizer; Natural pond fertilizer is discharged from the marsh-gas fermentation tank bottom, and biogas is through in the pipeline input storage tank that is connected with marsh-gas fermentation tank top; Second step, the biogas in the storage tank after pressurization successively through desulfurizer and dewatering unit carry out desulfurization, dehydration obtains the biogas that staple is methane and carbonic acid gas, behind the separation purifying plant, obtains methane and carbonic acid gas respectively again.
The foregoing description 1 can be done further to optimize or/and select:
The anaerobically fermenting of
the foregoing description 1 adopts complete hybrid anaerobic fermentation jar, in jar whisking appliance is set, and in jar well heater is set.
The thermal source that heats of the well heater of
the foregoing description 1 is a high temperature circulation water, and high temperature circulation water is from gas fired-boiler, and boiler adopts gas fired-boiler, and fuel is biogas or methane.
The desulfurizer of
the foregoing description 1 adopts the alternating temperature absorption method; Sorbent material is a gac; The biogas after the desulfurization is adopted in desorb, when being heated to 160 ℃ to 200 ℃, removes reproducing adsorbent, and regenerated methane returns desulfurizer and circulates once more; Regenerated methane adopts the flame furnace direct heating, and flame furnace fuel is biogas or methane.
The dewatering unit of
the foregoing description 1 adopts the alternating temperature absorption method; Sorbent material is a silica gel; The dry biogas after the dehydration is adopted in desorb, after compressor pressurizes, flame furnace heating, removes the siccative of regenerating, and this part dry biogas reflux dewatering device portal again circulates once more.
The separation purifying plant of
the foregoing description 1 adopts pressure swing adsorption process, and sorbent material is a molecular sieve, and two groups of Roots vaccum pump vacuum pumping methods are adopted in desorb.
The carbonic acid gas that the separation purifying plant of
the foregoing description 1 obtains is purified through absorption process.
embodiment 2 (most preferred embodiment); Shown in accompanying drawing 1; This biogas engineering two gas one fertile complex method is undertaken by following step: anaerobically fermenting in marsh-gas fermentation tank 1 such as biogas raw material such as ensiling stalks, the natural pond fertilizer of generation are discharged through the fertile pipeline 19 in natural pond and are delivered to the user outside the marsh-gas fermentation tank 1.Biogas is forced into 7～8 * 10 through compressor 3 in pipeline is delivered to biogas storage tank 2
5
Pa; Be warming up to and deliver to desulfurizer 4 after 50 ℃ to 70 ℃ (in the process of pressurized gas, are easy to make temperature arrive more than 50 ℃) and carry out desulfurization; Get into dewatering unit 6 after desulfurization finishes and dewater, well heater 5 provides sweetening agent, dewatering agent regeneration institute heat requirement.Well heater 5 adopts flame furnace, and fuel is biogas, but the direct heating regeneration gas.Sweetening agent can adopt gac or/and molecular sieve or/and red stone etc., and wherein gac has flourishing specific surface area, microvoid structure, thermostability, high-adsorption-capacity and advantage such as cheap and uses more.Dewatering agent can adopt silica gel or/and activated alumina or/and molecular sieve etc., and silica gel has higher activity and stability preferably, and the biogas dehydration can be adopted silica gel.Desulfurization, dehydration are the cleaning section of biogas, purify back hydrogen sulfide in methane content＜15mg/m
3
, water vapor volume(tric)fraction＜1 * 10
-6
, can satisfy related request.Purifying back biogas main component is methane and carbon dioxide, forms methane and carbon dioxide through separating after purifying plant 7 is handled.Separate purifying plant and preferably adopt four forms, two desorbs of two absorption were staggered respectively for 1/2 cycle.Separating purifies can adopt zeolite molecular sieve or/and carbon molecular sieve or/and activated carbon etc. with sorbent material; Can carry out the on-line continuous monitoring to each isolating methane with infrared radiation detection apparatus; If methane content is below 93% from the gas that the separation purifying plant comes out, gas need return separation purifying plant inlet and adsorb once more to improve methane content, if methane content is more than 93%; Adopt analysis tester 9 to carry out composition detection through condensing surface 11 backs; After meeting the domestic gas standard, add through stink adder 10 smelly, through compressor unit 12 compression; Can be stored in the high-pressure gas cylinder 15 after reaching vehicle fuel pressure 20～25MPa, can be the gas combustion automobile aerating through vehicle fuel pipeline 17 at last; Perhaps add and send into gas distributing system 14 after smelly, get into Sweet natural gas user pipeline 18 air feed at last through stink adder 10.After if analysis tester 9 detects, hydrogen sulfide, water vapour composition do not meet domestic gas standard and compressed natural gas used as vehicle fuel standard, then are delivered to separate once more in the source line of compressor 3 to purify.Carbonic acid gas is stayed in the adsorption bed after by molecular sieve adsorption; The way desorb of adopting vacuum pump to vacuumize was all pressed when vacuum pump is evacuated to 1000Pa with adsorption bed 10 minutes, and the carbonic acid gas of extraction is delivered to carbonic acid gas pipeline 16; After the liquefaction storage, can do the fertile use of gas, also can make food-grade carbon-dioxide.
Shown in accompanying drawing 2, the above-mentioned carbonic acid gas that comes out from vacuum pump 8 if purity has requirements at the higher level, can pass through absorption process purifying carbon dioxide method 13 and further purify.This method is: carbonic acid gas is absorbed by the MEA absorption liquid from source line 21 entering absorption towers 22; Trace methane is discharged from methane pipeline 20; Absorption liquid gets into desorb after heating in the desorption tower 25 behind interchanger 24; Add the high temperature circulation water 27 that the thermal recovery gas fired-boiler comes out, the carbonic acid gas after the desorb gets into carbonic acid gas outlet line 26.Stripping liquid is through lower the temperature through supercooler 23 behind the interchanger 24 again, and heat-eliminating medium is a tap water in the water cooler, and can circulate once more behind the entering absorption tower 22 absorbs the carbonic acid gas that gets into source line 21.Whether use this method to decide according to the required carbon dioxide purity situation in market.
Claims (10)
1. biogas engineering two gas one fertile complex method; It is characterized in that being undertaken: the first step by following step; Biogas raw material anaerobically fermenting in marsh-gas fermentation tank; It is fertile to produce biogas and natural pond, and natural pond fertilizer is discharged from the marsh-gas fermentation tank bottom, and biogas is through in the pipeline input storage tank that is connected with marsh-gas fermentation tank top; Second step, the biogas in the storage tank after pressurization successively through desulfurizer and dewatering unit carry out desulfurization, dehydration obtains the biogas that staple is methane and carbonic acid gas, behind the separation purifying plant, obtains methane and carbonic acid gas respectively again.
2. biogas engineering two gas one fertile complex method according to claim 1 is characterized in that anaerobically fermenting adopts complete hybrid anaerobic fermentation jar, in jar whisking appliance is set, and in jar well heater is set.
3. biogas engineering two gas one fertile complex method according to claim 2 is characterized in that the thermal source that heats of well heater is a high temperature circulation water, and high temperature circulation water is from gas fired-boiler, and boiler adopts gas fired-boiler, and fuel is biogas or methane.
4. according to claim 1 or 2 or 3 described biogas engineering two gas one fertile complex methods; It is characterized in that desulfurizer adopts the alternating temperature absorption method, sorbent material is a gac, and the biogas after the desulfurization is adopted in desorb; When being heated to 160 ℃ to 200 ℃, remove reproducing adsorbent; Regenerated methane returns desulfurizer and circulates once more, and regenerated methane adopts the flame furnace direct heating, and flame furnace fuel is biogas or methane.
5. according to claim 1 or 2 or 3 described biogas engineering two gas one fertile complex methods; It is characterized in that dewatering unit adopts the alternating temperature absorption method; Sorbent material is a silica gel; The dry biogas after the dehydration is adopted in desorb, after compressor pressurizes, flame furnace heating, removes the siccative of regenerating, and this part dry biogas reflux dewatering device portal again circulates once more.
6. biogas engineering two gas one fertile complex method according to claim 4; It is characterized in that dewatering unit adopts the alternating temperature absorption method; Sorbent material is a silica gel; The dry biogas after the dehydration is adopted in desorb, after compressor pressurizes, flame furnace heating, removes the siccative of regenerating, and this part dry biogas reflux dewatering device portal again circulates once more.
7. according to claim 1 or 2 or 3 described biogas engineering two gas one fertile complex methods, it is characterized in that separating purifying plant and adopt pressure swing adsorption process, sorbent material is a molecular sieve, and two groups of Roots vaccum pump vacuum pumping methods are adopted in desorb.
8. biogas engineering two gas one fertile complex method according to claim 6 is characterized in that separating purifying plant and adopts pressure swing adsorption process, and sorbent material is a molecular sieve, and two groups of Roots vaccum pump vacuum pumping methods are adopted in desorb.
9. according to claim 1 or 2 or 3 described biogas engineering two gas one fertile complex methods, it is characterized in that separating the carbonic acid gas that purifying plant obtains and purify through absorption process.
10. biogas engineering two gas one fertile complex method according to claim 8 is characterized in that separating the carbonic acid gas that purifying plant obtains and purifies through absorption process.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103146760A (en) * | 2013-03-18 | 2013-06-12 | 张其标 | High-efficiency, energy-saving and environment-friendly technology for fermentation and purification of biogas |
| CN106590788A (en) * | 2016-12-30 | 2017-04-26 | 北京健坤伟华新能源科技有限公司 | Ultralow-pressure swing adsorption biogas purifying device |
| CN110094634A (en) * | 2019-04-09 | 2019-08-06 | 同济大学 | A kind of negative carbon emission biomass produces the system and method for biogas |
| CN110265995A (en) * | 2019-05-23 | 2019-09-20 | 上海航天智慧能源技术有限公司 | A kind of pneumoelectric coupling energy supplying system provided multiple forms of energy to complement each other |
| CN112899047A (en) * | 2021-01-20 | 2021-06-04 | 华中科技大学 | Application of titanium oxyhydroxide as biogas purifying agent, biogas purifying equipment and method |
-
2011
- 2011-09-07 CN CN201110263903A patent/CN102321676A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103146760A (en) * | 2013-03-18 | 2013-06-12 | 张其标 | High-efficiency, energy-saving and environment-friendly technology for fermentation and purification of biogas |
| CN106590788A (en) * | 2016-12-30 | 2017-04-26 | 北京健坤伟华新能源科技有限公司 | Ultralow-pressure swing adsorption biogas purifying device |
| CN110094634A (en) * | 2019-04-09 | 2019-08-06 | 同济大学 | A kind of negative carbon emission biomass produces the system and method for biogas |
| CN110094634B (en) * | 2019-04-09 | 2020-07-28 | 同济大学 | System and method for producing biogas by negative carbon emission biomass |
| CN110265995A (en) * | 2019-05-23 | 2019-09-20 | 上海航天智慧能源技术有限公司 | A kind of pneumoelectric coupling energy supplying system provided multiple forms of energy to complement each other |
| CN112899047A (en) * | 2021-01-20 | 2021-06-04 | 华中科技大学 | Application of titanium oxyhydroxide as biogas purifying agent, biogas purifying equipment and method |
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Application publication date: 20120118 |