CN205730824U - A kind of device utilizing microorganism directly to remove hydrogen sulfide in methane - Google Patents
A kind of device utilizing microorganism directly to remove hydrogen sulfide in methane Download PDFInfo
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- CN205730824U CN205730824U CN201620408198.1U CN201620408198U CN205730824U CN 205730824 U CN205730824 U CN 205730824U CN 201620408198 U CN201620408198 U CN 201620408198U CN 205730824 U CN205730824 U CN 205730824U
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- tower
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- desulfurizing tower
- hydrogen sulfide
- biogas
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- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 229910000037 hydrogen sulfide Inorganic materials 0.000 title claims abstract description 61
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 244000005700 microbiome Species 0.000 title claims description 9
- 239000007789 gas Substances 0.000 claims abstract description 60
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 44
- 238000000034 method Methods 0.000 claims abstract description 41
- 230000008569 process Effects 0.000 claims abstract description 30
- 239000007921 spray Substances 0.000 claims abstract description 19
- 238000005201 scrubbing Methods 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 239000012531 culture fluid Substances 0.000 claims abstract description 13
- 238000006477 desulfuration reaction Methods 0.000 claims description 35
- 230000023556 desulfurization Effects 0.000 claims description 34
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 30
- 229910052760 oxygen Inorganic materials 0.000 claims description 30
- 239000001301 oxygen Substances 0.000 claims description 30
- 238000005273 aeration Methods 0.000 claims description 25
- 239000000945 filler Substances 0.000 claims description 17
- 238000000855 fermentation Methods 0.000 claims description 13
- 230000004151 fermentation Effects 0.000 claims description 13
- 239000002002 slurry Substances 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 9
- 239000006228 supernatant Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 239000011152 fibreglass Substances 0.000 claims description 2
- 238000012545 processing Methods 0.000 abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- 239000012535 impurity Substances 0.000 description 14
- 238000007254 oxidation reaction Methods 0.000 description 10
- 241000894006 Bacteria Species 0.000 description 9
- 230000003647 oxidation Effects 0.000 description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 230000000813 microbial effect Effects 0.000 description 6
- 235000015097 nutrients Nutrition 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 238000005406 washing Methods 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000008399 tap water Substances 0.000 description 4
- 235000020679 tap water Nutrition 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003550 marker Substances 0.000 description 2
- 230000003020 moisturizing effect Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 231100000004 severe toxicity Toxicity 0.000 description 2
- -1 sulphur compound Chemical class 0.000 description 2
- 230000004083 survival effect Effects 0.000 description 2
- 241000605222 Acidithiobacillus ferrooxidans Species 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 241000605118 Thiobacillus Species 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 208000012826 adjustment disease Diseases 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000002210 biocatalytic effect Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 231100000518 lethal Toxicity 0.000 description 1
- 230000001665 lethal effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003158 microbiostatic effect Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003958 nerve gas Substances 0.000 description 1
- 150000002898 organic sulfur compounds Chemical class 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000019086 sulfide ion homeostasis Effects 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 230000009469 supplementation Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/52—Hydrogen sulfide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/84—Biological processes
- B01D53/85—Biological processes with gas-solid contact
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/102—Removal of contaminants of acid contaminants
- C10L3/103—Sulfur containing contaminants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/05—Biogas
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The utility model discloses a kind of device removing hydrogen sulfide in methane, including preposition scrubbing tower, main desulfurizing tower and external reactor, described preposition scrubbing tower is provided with biogas entrance and upper gas outlet, and the gas feed of the outlet of described upper gas and main desulfurizing tower connects；Described main desulfurizing tower, for dripping filter tower, described filter tower is provided with gas access and lower liquid outlet；Height is accumulated higher than liquid in main desulfurizing tower in described gas access；Described reactor is connected by the lower liquid outlet of pipeline and main desulfurizing tower, described main desulfurizing tower includes some liquid-inlets and spray equipment from top to bottom, described liquid-inlet and spray equipment connect, and the culture fluid in described reactor enters the spray equipment in main desulfurizing tower by pump and liquid-inlet.This utility model can process the concentration of hydrogen sulfide biogas higher than 5000ppmv, directly hydrogen sulfide can be dropped to below 100ppmv, meets the technical need of boiler, electromotor, and the processing cost of every cubic metre is less than 0.014 yuan.
Description
Technical field
This utility model belongs to biogas treatment field, is specifically related to a kind of device removing hydrogen sulfide in methane of a kind of device utilizing microorganism directly to remove hydrogen sulfide in methane.
Background technology
Biogas is the general designation of the mixed gas produced under organic anaerobic condition, its main component is based on methane (50%-60%), carbon dioxide (40%-50%), additionally possibly together with hundreds of different foreign gas and solid impurities such as steam, hydrogen sulfide, ammonia, carbon monoxide, nitrogen, oxygen, wherein hydrogen sulfide content is from 1000ppm (volume ratio) to 10000ppm.Hydrogen sulfide not only severe toxicity and also be inflammable and explosive composition.In National Fuel Gas standard, the content requirement of hydrogen sulfide is less than 20mg/Nm3, and vehicle-mounted gas standard is 15mg/Nm3.Because the characteristic of fermentation raw material, almost all of biogas all contains hydrogen sulfide and increasingly complex organic sulfur compounds.
Process for biogas relates generally to impurity component therein process and the process of hydrogen sulfide.Owing to biogas treatment process needs to consider that Cost Problems and biogas are originally as sour gas, if needing to introduce new energy consumption according to the mode of conventional removing solid particle, therefore biogas is not boosted at present and the most directly the solid impurity in biogas is carried out individual processing, but follow-up handle together in sweetening process.
China is biogas production big country, estimate that annual various biogas generation amount is more than 10,000,000,000 cubes, but owing to it is inflammable and explosive, impurity is more, the especially toxic component content such as hydrogen sulfide is the most higher, seriously constraining the utilization of biogas, the inspection shaft operation frequently referred in general report causes the dead situation of people and is typically all because caused by hydrogen sulfide poisoning, hydrogen sulfide belongs to nerve gas class, lethal rapidly, so biogas desulfurization is the only way of biogas utilization.
Along with the change that cleans of China's energy resource structure, biogas will undertake more importantly role.But the utilization of biogas seriously receives the impact of wherein pollutant component, especially sulphur compound.Sulfur in biogas is based on hydrogen sulfide, and hydrogen sulfide is not only severe toxicity gas, and is also the main component forming air acidity gaseous contamination after burning.So biogas desulfurization, it also it is the important means controlling acid gas emissions.
Common biogas desulfurization mode has a variety of, is divided into Physical and the big class of chemical method two in simple terms.Physical processes with physical absorption or is absorbed as main, and the concentration of process is the most relatively low, and (condition is required higher by special Physical Absorption method, such as low-temp methanol washing process), chemical method, based on chemical reaction, is typically directed to catalysis and a large amount of drug out loss, and processing cost is high.Tabulation conventional during general measurement desulfurization expense typically requires the operating cost of 0.1-0.2 unit every side gas for the expense of every square gas, chemical method.
Biological desulphurization is the new method of the new removing hydrogen sulfide grown up in recent years, also known as biocatalytic desulfurization (being called for short BDS), is a kind of a kind of new technique utilizing aerobe removing biogas to contain the sulfide based on hydrogen sulfide at normal temperatures and pressures.Its process is the aerobic antibacterial and sulfide generation oxidation reaction produced with nature, Oxidation of Hydrogen Sulfide becomes elemental sulfur, sulfate or sulphite proceed to solid phase or aqueous phase, thus reaches the purpose of desulfurization.BDS technology has been developed in decades, so far still in the developmental research stage so far from appearance.Run due to system and rely primarily on biological activity, so operating cost is the lowest, good operation stability.
Biological desulphurization purifies gas can be divided into three steps:
Dissolving: the moisture film contact stain thing of biogas and water or the surface of solids is soluble in water or be that the molecule in liquid phase or ion, i.e. hydrogen sulfide are transferred to liquid phase by gas phase, this step meets physical process Henry's law.
Absorption absorbs: in aqueous solution, odor pollutant is by microorganism adsorption, absorption.Being transferred to from water in microbial body, the water as absorbent is reproduced recovery, then goes to dissolve new odor pollutant.
Biodegradation: the odor pollutant of entrance microbial cell is decomposed as the energy or the nutrient of microbial life activity and utilizes, and makes pollutant be removed.
Enter the Organic substance oxidation Decomposition under desmoenzyme effect in microbial cell, carry out anabolism simultaneously and produce new microbial cell.Biological desulfurizing technology includes that Biological fitler method, biosorption process and biological island, three kinds of systems all belong to open systems.
Current system is in during laboratory scale preferable for the process performance of gas, but when being applied to the scene of reality, its disposal ability is not enough, conventional bio-desulfurization device can be with concentration for the treatment of at the biogas of about 3000ppm, limited for its disposal ability of biogas more than this concentration, and flora cannot the environment of adjustment reaction device, lost efficacy in the short period of time, its reason is the microorganism in the hydrogen sulfide gas of high concentration inhibits reactor.In the presence of high concentration hydrogen sulfide gas, flora not only can be made to lose efficacy and form elemental sulfur, and it oxidation can form sulfate further, and this process is not observed when low concentration, it may there is no corresponding relation with the concentration of hydrogen sulfide, and it is mixed into oxygen and air can bring the risk in production, as introduced follow-up NOx and nitrogen.
Utility model content
For overcoming the defect that cannot process high concentration in existing biological desulfurizing technology, this utility model provides a kind of apparatus and method removing hydrogen sulfide in methane.
This utility model is for meeting microbiostatic activity in the presence of prior art middle and high concentration hydrogen sulfide gas and causes the defect that flora is dead and oxidation product is complicated to provide the device of a kind of new removing hydrogen sulfide, hydrogen sulfide is stripped of the impurity affecting bacterial activity of the unknown by this utility model by pretreatment, by process, microorganism is reacted in suitable oxygen concentration afterwards, so that oxidation product is the sulfate of solubility.
The device that this utility model provides includes preposition scrubbing tower, main desulfurizing tower and external reactor；
Described preposition scrubbing tower is provided with biogas entrance and upper gas outlet, and the gas feed of the outlet of described upper gas and main desulfurizing tower connects；
Described main desulfurizing tower, for dripping filter tower, described filter tower is provided with gas access and lower liquid outlet；Height is accumulated higher than liquid in main desulfurizing tower in described gas access；
Described reactor is connected by the lower liquid outlet of pipeline and main desulfurizing tower, described main desulfurizing tower includes some liquid-inlets and spray equipment from top to bottom, described liquid-inlet and spray equipment connect, and the culture fluid in described reactor enters the spray equipment in main desulfurizing tower by pump and liquid-inlet.
Preferably, described main desulfurizing tower built-in filler material is not stratified plastic filler (preferably PP class), and wire feeding is Raschig ring, Pall ring or cascade ring, and its characteristic size is about 80mm, bottom grill support, and tower material is fiberglass.Aforementioned structure can effectively prevent corrosion.
Described filling surface is growth of microorganism region, and the hydrogen sulfide in biogas enters microbial activities region by gas-liquid surface, is obtained by microorganism, thus maintains the hydrogen sulfide lasting transport process from gas to liquid, finally realizes the removal of hydrogen sulfide in methane.Preferably, bottom in described main desulfurizing tower spray is intermittent duty, because adjacent gas inlets desulfurization load is higher, periodically turns on bottom spray and filler can be accumulated impurity and wash down, and its control valve is autocontrol valve.
The fermentation methane that this utility model processes is common biogas, and it both typically is from similar installation for fermenting, and pressure is relatively low, about 1-3kPa, and gas is messy, containing impurity such as more solid particles；Comparison of ingredients is complicated, and main component has methane to account for 50%-60%, carbon dioxide about 40%-50%, hydrogen sulfide about 1000ppmv-10000ppmv, in addition, also has other not determine composition.
Described preposition scrubbing tower be filler be the packed tower of DG25 or DG50 dumped packing, the circulation fluid of described packed tower for fermentation biogas slurry supernatant.Aforesaid filler is generally plastics, preferably PP class plastics.In aforementioned filler tower, circulating pump by water from top of tower drench, with biogas adverse current.The impurity that recirculated water generally uses under tap water cleans remains in tower bottom, periodically discharges.
Described preposition scrubbing tower can use fermentation biogas slurry supernatant as circulation fluid, described fermentation biogas slurry supernatant is possible not only to gas washing, the hydrogen sulfide in part biogas (reduction ratio reaches as high as 10%) can also be removed, and this process reduces the hydrogen sulfide content of follow-up desulfurizing tower entrance so that its gas the most persistently processing high concentration becomes a reality.
After preposition scrubbing tower washs, hydrogen sulfide ratio in described biogas occurs in that reduction, and the content of hydrogen sulfide is the highest can be down to below 9000ppmv from 10000ppmv, after this step process, although the concentration of hydrogen sulfide reduced by only a part, but effectively avoid flora and lost efficacy.
Utility model people finds, for the biogas after this step process, the strain of main desulfurizing tower significantly improves for the toleration of concentration of hydrogen sulfide, hydrogen sulfide major part is sulfate radical by direct oxidation, thus avoid the precipitation of elemental sulfur and the deposition on reaction tower, so that this course of reaction can persistently be carried out.
Desulfurized effect for desulfurizing tower can be detected by the oxygen concentration table after tower, and this concentration may be used for adjusting inclusion of air amount before tower.
Described external reactor is provided with Aeration tank, and described culture fluid is direct with the oxygen mix in air in Aeration tank.Utilizing air pump at this pond aeration, dissolved oxygen content in monitoring solution, so can reduce the mixed volume of front end air simultaneously.When exposing in the case of oxygen amount meets reaction requirement, can stop front end air and be mixed into, after such desulfurization, biogas oxygen content can be the lowest, and owing to not having being mixed into of nitrogen, biogas calorific value can't reduce calorific value because of desulfurization.Aeration mode has two kinds, i.e. the direct aeration of blower fan and water pump injection type aeration.
It is generally acknowledged that in dripping filter tower, biogas has time enough and culture fluid mixing, even if requiring supplementation with oxygen, it should also be as being by reacting in blasting a filter tower after oxygen or air directly being mixed with biogas, and without additionally blasting oxygen containing culture fluid.Method of the present utility model can significantly reduce the addition of nitrogen, because biogas typically all burns utilization after desulfurization, so also effectively reducing the generation amount of NOx, this process the most effectively avoids the complexity of oxidation product.Because the effect of the oxygen that front end air adds the most also is to dissolve, so the mode of aeration oxygen can accelerate the reaction of biological bacteria.
Described external reactor is additionally provided with water pipe.Tap water can fill into this pond by aforementioned pipeline moisturizing.
Being provided with dividing plate in described external reactor, described reactor is separated into the region of Liang Ge top UNICOM by this dividing plate from bottom, and heating hot water and/or steam fill into wherein in a separated region.Because desulfurization bacterium environment need to maintain 25-30 DEG C, steam or the hot water of heating directly fill in aforesaid marker space, and this Hybrid Heating mode can be avoided additionally arranging one and corrosion is required high heat exchanger.
Described external reactor also includes that feeding tube, described nutrient add external reactor by feeding tube.Nutrient is filled into system by dosing pump automatically through feeding tube.
Between described preposition scrubbing tower and main desulfurizing tower, pipeline arranges air intake, and air is mixed in biogas by this entrance.Because desulfurization bacterium needs oxygen, can directly pass through blower fan (air pump) by inclusion of air biogas.The addition of air is on the basis of methane quantity, for the 10% of its flow.For preventing biogas from leaking, after blower fan, set non-return valve.The flow of air pump can be automatically adjusted according to biogas flow.In view of the effect of aeration, the air herein added can be coordinated to control in the lump.
Preferably, the middle part of described filter tower is provided with and is divided into two-part dividing plate by dripping filter tower, the top of described dividing plate and a filter tower is provided with gas passage, and described gas is processed by the packed tower desulfurization of opposite side through gas passage from top to bottom through dripping after filter tower desulfurization processes of side from the bottom to top.Which can change the sharing of load in tower, and after promoting disposal ability and desulfurization, biogas is given vent to anger by bottom, maintains easily.
This utility model additionally provides a kind of method removing hydrogen sulfide in methane, including:
1) biogas by circulation fluid be fermentation biogas slurry supernatant packed tower by preliminary purification；
2) biogas after preliminary purification enters and drips filter tower removing hydrogen sulfide, and the circulation fluid dripping filter tower is the culture fluid after air or oxygen aeration, and the pH value of described culture fluid is between 1.0-3.0；
3) desulfurization bacterium grows on filler, makes a living with the hydrogen sulfide in gas, supplementary oxygen and other a small amount of nutrients, from gaseous state, hydrogen sulfide is changed into elemental sulfur or sulfate radical and inferior sulfate radical.
Preferably, described biogas mainly includes methane 50%-60%, carbon dioxide 40%-50%, hydrogen sulfide 1000ppmv-10000ppmv, and preferred concentration is 5500-10000ppmv.
Preferably, the pH of described fermentation biogas slurry is 7.0-8.0.Although the solution providing similar pH can also play certain effect, but with regard to its cost and system can be for seriality aspect, it obviously possesses advantage not as fermentation biogas slurry.
Preferably, the oxygen content in described culture fluid after air or oxygen aeration is 3-9mg/L.Owing to concentration of hydrogen sulfide is higher, cannot process by traditional biological mode, flora is all suppressed by serious, and uses the processing mode of the application, it is ensured that removal efficiency that hydrogen sulfide is good also ensures the survival of strain.
Preferably, described filter tower is respectively provided with several spray equipments from top to bottom, and the jet apparatus of its middle and upper part is normally opened, and the spray equipment of bottom is that filler is accumulated impurity and washes down by the unlatching selected.
Preferably, the biogas after described preliminary purification is mixed into the volume accounting air less than 10% or is mixed into oxygen content in the gas making removing hydrogen sulfide and is not higher than the air of 0.5%.The flow of described air is the most controlled.
Preferably, described circulation fluid is from top is drenched, and general methane quantity and liquor capacity ratio is for 100:1.
Preferably, for flow 1000Nm3The biogas of/h, diameter 4 meters, the bacterial desulfurization tower of high 9 meters of filler, directly the hydrogen sulfide of 5000ppmv can be reduced to below 200ppmv.
Preferably, packed tower ratio of height to diameter is 2-3, preferably 2.55 ± 0.1.
Preferably, gas liquid ratio or volume ratio are 80-200, preferably 105 ± 5.
The strain in culture fluid in this utility model is aerobic strain, most important of which flora is thiobacillus ferrooxidant Thiobacillusferrooxidans, T.f), it it is a kind of gram negative bacteria, have chemautotrophy, aerobic, addicted to acid, be suitable to the characteristics such as middle temperature environment, being widely present in the sour environment of Acid mine water and iron content or sulfur, it is to be a kind of important leaching microbacteria, is used for biological ore dressing field.This utility model is different with traditional processing mode, on the premise of ensureing strain survival, hydrogen sulfide is further oxidized to the soluble sulphates such as sulfate radical, relative to using strain to be sulfur simple substance by Oxidation of Hydrogen Sulfide in prior art, thus realizes continuous desulfurization.
Preferably, when elemental sulfur generates when dripping formation accumulation in filter tower, it is mixed into air capacity by adjustment or aeration rate accelerates it and is converted into acid group or the flushing of provisional increasing spray flux.
This utility model has a following advantage:
1, there is preposition scrubbing tower, which removes and may affect the impurity of follow-up desulfurization process and the disposal ability of desulfurizing tower is improved；
2, desulfurizing tower is with outside multifunctional reactor, and wherein heating temperature control, dosing etc. all access from outside Aeration tank；
3, using aerobic desulfurization bacterium, oxygen supply introduces in the way of the direct hybrid mode of air and outside aeration, and outside Aeration tank is effectively reduced the amount being directly mixed with air, and the nitrogen that simultaneously will not enter system is too much；
4, the hydrogen sulfide content of general Organic substance (referring mainly to agricultural zootechnical) fermentation methane is less than 5000ppmv, and this utility model can process the biogas higher than this limit, directly hydrogen sulfide can be dropped to below 100ppmv by this method, meet the technical need of boiler, electromotor, and considering power consumption, water consumption and heat dissipation, the processing cost of every cubic metre of the present utility model is less than 0.014 yuan.
Accompanying drawing explanation
Fig. 1 is the device of removing hydrogen sulfide in methane gas of the present utility model.
Detailed description of the invention
The following is embodiment of the present utility model, it is used only as of the present utility model illustrating rather than restriction.
See Fig. 1,
The device that this utility model provides includes preposition scrubbing tower, main desulfurizing tower and reactor；
Described preposition scrubbing tower is provided with biogas entrance and upper gas outlet, and the gas feed of the outlet of described upper gas and main desulfurizing tower connects；
Described main desulfurizing tower, for dripping filter tower, described filter tower is provided with gas access, upper gas outlet and lower liquid outlet；Height is accumulated higher than liquid in main desulfurizing tower in described gas access；
Described reactor is connected by the lower liquid outlet of pipeline and main desulfurizing tower, described main desulfurizing tower includes some liquid-inlets and spray equipment from top to bottom, described liquid-inlet and spray equipment connect, and the culture fluid in described reactor enters the spray equipment in main desulfurizing tower by pump and liquid-inlet.
Described circulation fluid is from top is drenched, and general methane quantity and liquor capacity ratio is for 100:1.
Described bottom spray is for intermittent duty, because adjacent gas inlets desulfurization load is higher, periodically turns on bottom spray and filler can be accumulated impurity and wash down, and its control valve is autocontrol valve.
The fermentation methane that this utility model processes is common biogas, and it both typically is from similar installation for fermenting, and pressure is relatively low, about 1-3kPa, and gas is messy, containing impurity such as more solid particles；Comparison of ingredients is complicated, and main component has methane to account for 50%-60%, carbon dioxide about 40%-50%, hydrogen sulfide about 5500ppmv-10000ppmv, in addition, also has other not determine composition.
Desulfurized effect for desulfurizing tower can be detected by the oxygen concentration table after tower, and this concentration may be used for adjusting inclusion of air amount before tower.
Preferably, described external reactor is provided with Aeration tank, and described culture fluid is direct with the oxygen mix in air in Aeration tank.Utilizing air pump at this pond aeration, dissolved oxygen content in monitoring solution, so can reduce the mixed volume of front end air simultaneously.When exposing in the case of oxygen amount meets reaction requirement, can stop front end air and be mixed into, after such desulfurization, biogas oxygen content can be the lowest, and owing to not having being mixed into of nitrogen, biogas calorific value can't reduce calorific value because of desulfurization.Aeration mode has two kinds, i.e. the direct aeration of blower fan and water pump injection type aeration.
Preferably, described external reactor is provided with water pipe.Tap water can fill into this pond by aforementioned pipeline moisturizing.
Preferably, being provided with dividing plate in described external reactor, described reactor is separated into the region of Liang Ge top UNICOM by this dividing plate from bottom, and heating hot water and/or steam fill into wherein in a separated region.Because desulfurization bacterium environment need to maintain 25-30 DEG C, steam or the hot water of heating directly fill in aforesaid marker space, and this Hybrid Heating mode can be avoided additionally arranging one and corrosion is required high heat exchanger.
Preferably, described external reactor also includes that feeding tube, described nutrient add external reactor by feeding tube.Nutrient is filled into system by dosing pump automatically through feeding tube.
Preferably, between described preposition scrubbing tower and main desulfurizing tower, pipeline arranges air intake, and air is mixed in biogas by this entrance.Because desulfurization bacterium needs oxygen, can directly pass through blower fan (air pump) by inclusion of air biogas.The addition of air on the basis of methane quantity, for its flow 10% or be mixed into and make oxygen content in the gas of removing hydrogen sulfide be not higher than the air of 0.5%.For preventing biogas from leaking, after blower fan, set non-return valve.The flow of air pump can be automatically adjusted according to biogas flow.
Preferably, described preposition scrubbing tower be filler be the packed tower of DG25 or DG50 dumped packing, the circulation fluid of described packed tower for fermentation biogas slurry supernatant.Aforesaid filler is generally plastics.In aforementioned filler tower, circulating pump by water from top of tower drench, with biogas adverse current.The impurity that recirculated water generally uses under tap water cleans remains in tower bottom, periodically discharges.Packed tower can use fermentation biogas slurry supernatant as circulation fluid, it is possible not only to gas washing, the hydrogen sulfide in part biogas can also be removed, and this process reduces the hydrogen sulfide content of follow-up desulfurizing tower entrance, its gas the most persistently processing high concentration is become a reality, in gas after washing, concentration of hydrogen sulfide can be up to 5000-7000ppmv, and occurs without the problems such as flora inactivation and over oxidation.Because biogas slurry pH is generally about 8.0, having alkalescence, the reaction of desulfurization and washing process are a competitive relation, therefore this area is not the most used as washing gas.
Preferably, the middle part of described filter tower is provided with and is divided into two-part dividing plate by dripping filter tower, the top of described dividing plate and a filter tower is provided with gas passage, and described gas is processed by the packed tower desulfurization of opposite side through gas passage from top to bottom through dripping after filter tower desulfurization processes of side from the bottom to top.This set-up mode can extend the time of staying of gas, optimizes the effect of desulfurization further.
This utility model has the advantage that
1, there is preposition scrubbing tower, which removes and may affect the impurity of follow-up desulfurization process and the disposal ability of desulfurizing tower is improved；
2, desulfurizing tower is with outside multifunctional reactor, and wherein heating temperature control, dosing etc. all access from outside Aeration tank；
3, using aerobic desulfurization bacterium, oxygen supply introduces in the way of the direct hybrid mode of air and outside aeration, and outside Aeration tank is effectively reduced the amount being directly mixed with air, and the nitrogen that simultaneously will not enter system is too much.
Hydrogen sulfide directly can be dropped to below 100ppm by this utility model, meets the technical need of boiler, electromotor, and considers power consumption, water consumption, heat dissipation, and the processing cost of every cubic metre of the present utility model is less than 0.014 yuan.
Claims (6)
1. utilize microorganism directly to remove a device for hydrogen sulfide in methane, including preposition scrubbing tower, main desulfurizing tower
With external reactor, it is characterised in that:
Described preposition scrubbing tower is provided with biogas entrance and upper gas outlet, the outlet of described upper gas and main desulfurization
The gas feed of tower connects；
Described main desulfurizing tower, for dripping filter tower, described filter tower is provided with gas access and lower liquid outlet；Described gas
Body entrance accumulates height higher than liquid in main desulfurizing tower；
Described external reactor is connected by the lower liquid outlet of pipeline and main desulfurizing tower, and described main desulfurizing tower is from upper
Include under to that some liquid-inlets and spray equipment, described liquid-inlet and spray equipment connect, described external reactor
Interior culture fluid enters the spray equipment in main desulfurizing tower by pump and liquid-inlet.
Device the most according to claim 1, it is characterised in that the described built-in filler of main desulfurizing tower is not stratified
Plastic filler, wire feeding is Raschig ring, Pall ring or cascade ring, bottom grill support, and tower material is fiberglass.
Device the most according to claim 1, it is characterised in that described preposition scrubbing tower be filler be DG25
Or the packed tower of DG50 Pall ring filler in bulk, the circulation fluid of described packed tower is fermentation biogas slurry supernatant.
Device the most according to claim 1, it is characterised in that described external reactor is provided with Aeration tank,
Described culture fluid is direct with the oxygen mix in oxygen or air in Aeration tank.
Device the most according to claim 1, it is characterised in that manage between described preposition scrubbing tower and main desulfurizing tower
Road arranges air intake, and air is mixed in biogas by this entrance.
Device the most according to claim 1, it is characterised in that the middle part of described filter tower is provided with will drip filter
Tower is divided into two-part dividing plate, described dividing plate and drip the top of filter tower and be provided with gas passage, described gas by down to
On through side drip filter tower desulfurization process after processed by the packed tower desulfurization of opposite side from top to bottom through gas passage.
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| CN201620408198.1U Active CN205730824U (en) | 2016-02-23 | 2016-05-06 | A kind of device utilizing microorganism directly to remove hydrogen sulfide in methane |
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| CN105854550A (en) * | 2016-02-23 | 2016-08-17 | 北京时代桃源环境科技有限公司 | Method and device for directly removing hydrogen sulfide from biogas by microorganisms |
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| CN101234280B (en) * | 2007-11-07 | 2011-07-20 | 中山大学 | Absorption-biological treatment method for malodorous gas |
| CN102921293B (en) * | 2011-08-12 | 2014-10-15 | 中国石油天然气股份有限公司 | Method for processing foul gas through using biological combined technology |
| CN104152203B (en) * | 2014-08-31 | 2017-02-08 | 广西大学 | Method for purifying and preparing high-purity biomass methane by using biogas slurry |
| CN105854550A (en) * | 2016-02-23 | 2016-08-17 | 北京时代桃源环境科技有限公司 | Method and device for directly removing hydrogen sulfide from biogas by microorganisms |
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| CN105854550A (en) * | 2016-02-23 | 2016-08-17 | 北京时代桃源环境科技有限公司 | Method and device for directly removing hydrogen sulfide from biogas by microorganisms |
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