CN108211672A - Zinc cation desulfurizer and method based on acidophilia biological desulphurization bacterium - Google Patents
Zinc cation desulfurizer and method based on acidophilia biological desulphurization bacterium Download PDFInfo
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- CN108211672A CN108211672A CN201810218904.XA CN201810218904A CN108211672A CN 108211672 A CN108211672 A CN 108211672A CN 201810218904 A CN201810218904 A CN 201810218904A CN 108211672 A CN108211672 A CN 108211672A
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- 241000894006 Bacteria Species 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 30
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 229940006486 zinc cation Drugs 0.000 title claims abstract description 15
- 239000007789 gas Substances 0.000 claims abstract description 81
- 239000007788 liquid Substances 0.000 claims abstract description 59
- 238000006243 chemical reaction Methods 0.000 claims abstract description 34
- 238000005201 scrubbing Methods 0.000 claims abstract description 32
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 31
- 230000003647 oxidation Effects 0.000 claims abstract description 30
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 27
- 230000001105 regulatory effect Effects 0.000 claims abstract description 23
- 238000004062 sedimentation Methods 0.000 claims abstract description 23
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 20
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 17
- 238000012856 packing Methods 0.000 claims abstract description 12
- 239000007921 spray Substances 0.000 claims abstract description 12
- 230000023556 desulfurization Effects 0.000 claims abstract description 11
- 230000009471 action Effects 0.000 claims abstract description 8
- 239000006228 supernatant Substances 0.000 claims abstract description 6
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 44
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims description 44
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 32
- 229910052717 sulfur Inorganic materials 0.000 claims description 18
- 239000011593 sulfur Substances 0.000 claims description 18
- 238000012544 monitoring process Methods 0.000 claims description 11
- 230000001590 oxidative effect Effects 0.000 claims description 11
- 238000010521 absorption reaction Methods 0.000 claims description 10
- 235000015097 nutrients Nutrition 0.000 claims description 10
- 230000033116 oxidation-reduction process Effects 0.000 claims description 10
- 238000005192 partition Methods 0.000 claims description 9
- 239000010802 sludge Substances 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 230000009467 reduction Effects 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000010992 reflux Methods 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 230000001580 bacterial effect Effects 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000010865 sewage Substances 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 3
- 210000004907 gland Anatomy 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 239000006260 foam Substances 0.000 claims description 2
- 230000008676 import Effects 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 229910017435 S2 In Inorganic materials 0.000 claims 1
- 230000007935 neutral effect Effects 0.000 abstract description 9
- 230000006641 stabilisation Effects 0.000 abstract description 2
- 238000011105 stabilization Methods 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 abstract 1
- 230000008569 process Effects 0.000 description 15
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 12
- 239000000243 solution Substances 0.000 description 10
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- 238000005273 aeration Methods 0.000 description 6
- ZPWVASYFFYYZEW-UHFFFAOYSA-L dipotassium hydrogen phosphate Chemical compound [K+].[K+].OP([O-])([O-])=O ZPWVASYFFYYZEW-UHFFFAOYSA-L 0.000 description 6
- 229910000396 dipotassium phosphate Inorganic materials 0.000 description 6
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 5
- 239000007836 KH2PO4 Substances 0.000 description 5
- 239000001963 growth medium Substances 0.000 description 5
- 229910052603 melanterite Inorganic materials 0.000 description 5
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 5
- GNSKLFRGEWLPPA-UHFFFAOYSA-M potassium dihydrogen phosphate Chemical compound [K+].OP(O)([O-])=O GNSKLFRGEWLPPA-UHFFFAOYSA-M 0.000 description 5
- 229910052979 sodium sulfide Inorganic materials 0.000 description 5
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 description 5
- 239000005864 Sulphur Substances 0.000 description 4
- 241000605118 Thiobacillus Species 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 230000003009 desulfurizing effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000009630 liquid culture Methods 0.000 description 4
- 229910001629 magnesium chloride Inorganic materials 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 3
- 239000001110 calcium chloride Substances 0.000 description 3
- 229910001628 calcium chloride Inorganic materials 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- WHBHBVVOGNECLV-OBQKJFGGSA-N 11-deoxycortisol Chemical compound O=C1CC[C@]2(C)[C@H]3CC[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 WHBHBVVOGNECLV-OBQKJFGGSA-N 0.000 description 2
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 2
- 229910052564 epsomite Inorganic materials 0.000 description 2
- 239000010985 leather Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000004927 wastewater treatment sludge Methods 0.000 description 2
- 241000605222 Acidithiobacillus ferrooxidans Species 0.000 description 1
- 241000605272 Acidithiobacillus thiooxidans Species 0.000 description 1
- 241000193830 Bacillus <bacterium> Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 241000628997 Flos Species 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- FFEARJCKVFRZRR-BYPYZUCNSA-N L-methionine Chemical compound CSCC[C@H](N)C(O)=O FFEARJCKVFRZRR-BYPYZUCNSA-N 0.000 description 1
- 241001074129 Macromonas Species 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 239000008156 Ringer's lactate solution Substances 0.000 description 1
- 241000605268 Thiobacillus thioparus Species 0.000 description 1
- XOCUXOWLYLLJLV-UHFFFAOYSA-N [O].[S] Chemical compound [O].[S] XOCUXOWLYLLJLV-UHFFFAOYSA-N 0.000 description 1
- DPSZMPUXFZOWAC-UHFFFAOYSA-N [S].S=O Chemical compound [S].S=O DPSZMPUXFZOWAC-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 229960005070 ascorbic acid Drugs 0.000 description 1
- 235000010323 ascorbic acid Nutrition 0.000 description 1
- 239000011668 ascorbic acid Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229940041514 candida albicans extract Drugs 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 description 1
- 229910000397 disodium phosphate Inorganic materials 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 description 1
- 229910000357 manganese(II) sulfate Inorganic materials 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 229930182817 methionine Natural products 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 150000003463 sulfur Chemical class 0.000 description 1
- -1 vinasse Chemical compound 0.000 description 1
- 239000012138 yeast extract Substances 0.000 description 1
Classifications
-
- 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
- B01D53/14—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 by absorption
- B01D53/1456—Removing acid components
- B01D53/1468—Removing 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
- B01D53/14—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 by absorption
- B01D53/1493—Selection of liquid materials for use as absorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
-
- 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
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Microbiology (AREA)
- Water Supply & Treatment (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Biodiversity & Conservation Biology (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
A kind of zinc cation desulfurizer and method based on acidophilia biological desulphurization bacterium, including gas scrubbing tower, biooxidation reactions device, sedimentation basin, anaerobic reactor, regulating reservoir etc..Containing H2S gases enter gas scrubbing tower from air inlet, and neutral or weakly alkaline absorbing liquid is uniformly sprayed at packing layer by spray head, when gas is upwardly through packing layer with absorbing liquid counter current contacting, H therein2S is dissolved in absorbing liquid.Absorbing liquid is pumped into biooxidation reactions device from scrubbing tower lower part liquid outlet, the S in absorbing liquid2‑Elemental sulfur is partly oxidized under the action of acidophilia desulfurization bacterium, is partly oxidized to SO4 2‑So that pH range stabilizations are between 2 3.5.Liquid flooding after oxidation enters sedimentation basin, and most of elemental sulfur is deposited to bottom of pond discharge, and is recycled.Supernatant enters anaerobic reaction device, part SO after filtering4 2‑S is reduced under the action of sulfate reducing bacteria2‑。
Description
Technical field
Processing system and processing method more particularly to one kind the present invention relates to hydrogen sulfide in a kind of removal gas is based on thermophilic
The zinc cation desulfurizer and method of acidic bio desulfurization bacterium.
Background technology
H2S is impurity common in natural gas and biogas.China's sulfur-containing gas rich reserves, hydrogen sulfide content are more than 1%
Gas reserves account for a quarter of national gas reserves.H in biogas2S is derived from containing prot th, such as half Guang ammonia
Acid and methionine, the especially raw material rich in sulphur, such as vinasse, macro and paper-making industrial waste water etc..The H in landfill gas2S
It is also possible to come from gypsum.H2S and water phase meet and get along well to form sulfuric acid, corrode biogas and gas utilization equipment.Contain H2The gas of S
Burning can generate sulfuric acid discharge, and H2S inherently has high toxicity, can generate very serious health risk.Gas sweetening
There are many method, can be divided into biology, chemically and physically doctor treatment according to its principle.Chemical desulfurization method mainly includes chemical oxidation and alkali
It absorbs, needs using a large amount of chemical agent, there are operating cost height, are also easy to produce secondary pollution problems.Physical desulfurization method
Including solvent absorption and active carbon adsorption, it is also desirable to chemical agent is regularly replaced, it is general only to need special low in hydrogen sulphide
It is used during concentration.Biological desulfurization is to utilize sulfur bacteria by H2S is oxidized to the process of elemental sulfur or sulfuric acid.With Physical, change
Method is compared, and biological desulfurizing technology has mild condition, easy to operate, maintenance cost and low energy consumption, clean environment firendly, product can provide
The advantages that source, gradually has vast potential for future development into one of mainstream technology of gas sweetening.
The patent No. 200710067269.1, the Chinese patent literature of entitled " methane bio-desulfurization device " disclose one kind
Bio-desulfurization device, the device are a desulfurizing towers with biogas import and methane outlet, if placing filler stem in desulfurizing tower, are filled out
Material top is equipped with nozzle, and nozzle is connected with the delivery pipe with reflux pump, and another nozzle of delivery pipe is located at the battalion of desulfurizing tower lower part
Nutrient solution section, tower bottom are equipped with floss hole.This sulfur removal technology makes and easy to operate, and desulfurization effect is preferable, but existing master
It is that process is difficult to control to want problem, and packed tower easily occurs and blocks.The dilute sulfuric acid that technique final product is about 0.5% for a large amount of concentration,
Secondary pollution is generated, subsequent dilute acid pretreatment need to be done.And oxygen can be introduced in the process, there are security risks, and it is even more impossible to meet
Methane purification does requirement of the bio-natural gas to GAS QUALITY.
Patent No. CN97180128.2 entitled " method of gas sweetening " discloses one kind and hydrogen sulfide is removed from air-flow
Method.The patent No. 201310012017.4, entitled " a kind of two-part methane bio-desulfurization device " disclose two sections a kind of
Formula methane bio-desulfurization device.In two patents, H2S absorbs and biological oxidation is completed in two reactors respectively, absorbs
Liquid is moved in circles, is regenerated, and solves the problems, such as that elemental sulfur blocks packing layer, product gas is mixed into excessive oxygen well.H2The height of S
Effect, which absorbs, needs weakly alkaline absorbing liquid, and the pH to ensure absorbing liquid is in alkalescent state, and two patents are all using neutral de-
Sulphur bacterium, the pH of biooxidation reactions system are also at neutral or alkalescent state.Patent 201310012017.4 is absorbing liquid
Dissolved oxygen control in a certain range, avoid the formation of sulfate in oxidation trough so that the pH in oxidation trough is also at alkaline model
It encloses.Patent CN97180128.2 is the acidification for preventing medium in oxidation reactor, is neutralized using sodium hydroxide or sodium carbonate,
So that oxidation reactor is in neutral or alkalescent state.
Invention content
The present invention is using acidophilia desulfurization bacterium in acid condition to H2S carries out biological oxidation, greatly improves biology
The operating load of oxidation process.
To solve in two-part bio-desulfurization device operational process, scrubbing tower operation needs neutral or weakly alkaline environment, and
Biooxidation reactions need the contradiction between acidic environment, and this invention takes following technical schemes：One kind is taken off based on acidophilia
The zinc cation desulfurizer of sulphur bacterium, it includes the scrubbing tower of removal hydrogen sulfide, and biooxidation reactions device, sedimentation basin, anaerobism are anti-
Answer device and regulating reservoir.It is equipped with demister, spray head, packing layer and gas distribution pipe, scrubbing tower bottom successively from top to bottom in scrubbing tower
Portion is connected with the top of biooxidation reactions device by elevator pump and pipeline；By pipeline with sinking at the top of biooxidation reactions device
Shallow lake pond, which is connected, makes absorbing liquid overflow enter sedimentation basin；Dissolved oxygen electrode and oxidation-reduction electrode are equipped in biooxidation reactions device.
The sedimentation basin is closed container, and lower part is divided into tapered structure, and bottom sets material outlet.Top is divided by the partition board of vertical arrangement
Two parts, partition board left side are provided with liquid-inlet, overflow port are provided on the right side of partition board.At the top of sedimentation basin and anaerobic reactor bottom
It is connected by elevator pump with pipeline；
Anaerobic reactor top is connected with regulating reservoir top by pipeline, and anaerobic reactor water outlet overflow enters regulating reservoir；It adjusts
Section bottom of pond portion is connected by elevator pump and pipeline with the spray head on scrubbing tower top；Be equipped in regulating reservoir online pH electrodes and
Line conductivity electrode.It is provided in scrubbing tower lower part containing H2S gas feeds, are provided with H at the top of anaerobic reactor2S gases go out
Mouthful, H2S gas vents are with containing H2S gas feeds are connected by pipeline.Containing H2S gas feeds extend in scrubbing tower and gas distribution
Pipe connects.
By above device, H in gas is removed2The technique of S gases is specific as follows:
（1）H2The S absorption stages：Gas is by containing H2S gas feeds enter from wash tower bottoms, with the entrance at the top of scrubbing tower
Absorbing liquid counter current contacting, H2S is absorbed by liquid absorption, and clean gas is discharged from purified gas outlet.
（2）Aerobe oxidation stage:The absorbing liquid of wash tower bottoms is boosted to be pumped into biooxidation reactions device, S2-
Simple substance S is mostly oxidised under the action of acidophilia biological desulphurization bacterium, small part is oxidized to SO4 2-.Absorbing liquid after oxidation
Into sedimentation basin, the elemental sulfur after precipitation is discharged through leakage fluid dram, is refined.Biooxidation reactions use the acidophilia life by domestication
Object desulfurization bacterium, temperature are controlled at 35 DEG C, and the start-stop and air mass flow of air pump are controlled by on-line oxidation reduction potential, and oxidation is also
Former current potential control is stablized in -250~-100mV, pH 2~3.5.
（3）The anaerobic reduction stage:The boosted pump of supernatant in sedimentation basin is fed from below into anaerobic reactor, anaerobic reaction
For device using rich sulfate reducing bacteria flora, the residence time is 10-15 hours.SO4 2-Under the action of rich sulfate reducing bacteria flora
Again it is reduced to S2-, absorbing liquid obtains partial reduction, and pH gets a promotion, and contains H2The gas of S is from H2S gas vents flow back into
Containing H2S gas feeds are handled again.
（4）Absorbing liquid adjusts the reuse stage:Absorbing liquid by anaerobic bio-treated is pumped up entering regulating reservoir, according to setting
Online pH electrodes and online conductivity electrode in regulating reservoir output signal to pH on-line monitoring units and conductivity is supervised online
Unit, pH on-line monitoring units and conductivity on-line monitoring unit control lye dosing pump and nutrient solution dosing pump are surveyed, passes through control
Conductivity range processed is in 30-90mS/cm, and pH ranges are in 8-9, to control the start-stop of dosing pump.Absorbing liquid after adjusting is boosted
Pump enters the spray head in scrubbing tower.
The specific feature of this programme also has, and the lye that pH adjustings use can be NaOH or NaCO3。
Packing layer uses Pall ring or hollow ball filler.
In the scrubbing tower liquid outlet and sewage draining exit are equipped with positioned at the lower part of packing layer.
The biooxidation reactions device is the reactor using inner ring gas lift-type air feeding in center, and inside reactor is without mixing
Device is mainly made of outer tube, central draft tube and gas distributor, and central draft tube and outer tube are set in concentric circles.Work as sky
After gas enters central draft tube by gas distributor, liquid is made to carry bubble under the momentum of static pressure difference and entrance gas
It is formed and circulated in reactor, so as to reach good gas-liquid mixed.Biooxidation reactions device top sets gas outlet
And liquid overflow pipe.
Acidophilia biological desulphurization bacterium bag of the present invention includes acidophilia sulfur oxidizing bacterium flora or single acidophilia sulfur oxidizing bacterium
Bacterial strain.Acidophilia sulfur oxidizing bacterium mainly includes Thiobacillus, solfataricus genus, Macromonas, belongs to the sulphur oxygen of resistance to low pH
Change bacterium.Single acidophilia sulfur oxidizing bacterium bacterial strain mainly includes the acidophilias autotrophys such as Thiobacillus thioxidans, Thiobacillus ferrooxidans
Sulphur oxidation and bacillus.
In the anaerobic reactor, the sulfate of generation is reduced to S in the effect of rich sulfate reducing bacteria flora2-, so as to
So that pH is improved.Setting water distributor and three phase separator, richness is improved to ensure activated sludge concentration in anaerobic reactor
The efficiency of sulfate reducing bacteria flora.Three phase separator is made of sealing gland, settling zone and reflux seam three parts, anti-mounted on anaerobism
Answer the top of device that anaerobic reactor is divided into the reaction zone of lower part and the settling zone on top, play gas-liquid separation, separation of solid and liquid and
The effect of sludge reflux.
The richness sulfate reducing bacteria flora is widely present in the habitats such as soil, seawater, fresh water, sludge, in certain condition
It is lower domestication and obtain.
The regulating reservoir is closed container, is inside located at line conductivity electrode, online pH electrodes.
Compared with prior art, the present invention it has the advantages that：1. the present invention is using segmented biological desulphurization, profit
Biological oxidation is carried out to hydrogen sulfide under the conditions of pH2-3.5 with acidophilia biological desulphurization bacterium, with using neutral or alkaline environment
It is existing compare, the oxidation rate of hydrogen sulfide significantly improves, and the operating load of biooxidation reactions device improves 6-15 times, can be with
Reduce equipment scale and investment.2. the present invention is by biological oxidation process oxidation-reduction potential（- 250~-100mV）
Line is monitored and controlled, accurate to control Oxidation of Hydrogen Sulfide process, the appropriate SO4 of generation2-Just can biological oxidation process be tieed up
It holds in optimal acid running environment（pH2-3.5）, keep biological oxidation process Effec-tive Function.And pass through rich sulfate reducing bacteria
The effect of flora and Adding medicine control realize the regeneration of absorbing liquid efficient absorption ability, maintain system balancing.3. the SO of generation4 2-Through
Anaerobic reduction processing is crossed, the pH of absorbing liquid is on the one hand improved, on the other hand can reduce SO4 2-Discharge.4. setting is independent
Regulating reservoir, the accurate acid-base value and nutritional ingredient for controlling absorbing liquid, ensures H2The absorption of S and biological oxidation are all in optimised process
Condition.
Description of the drawings
Fig. 1 is the process unit schematic diagram of the present invention.
In figure：1- scrubbing towers；2- biooxidation reactions devices;3- sedimentation basins;4- anaerobic reactors;5- regulating reservoirs;6- foam removals
Device;7- spray heads;8- packing layers;9- gas distribution pipes;10- elevator pumps, 11- elevator pumps, 12- elevator pumps;13- air pumps;14- is led at center
Flow cartridge;15- three phase separators;16- lye dosing pumps;17- nutrient solution dosing pumps;18- dissolved oxygen electrodes;19- oxidation-reduction electrodes;
The online pH electrodes of 20-;The online conductivity electrodes of 21-；22- contains H2S gas feeds；23- purified gas outlets；24- leakage fluid drams；
25-H2S gas vents;26- lye;27- nutrient solutions.
Specific embodiment
Present disclosure is described in further details with reference to the accompanying drawings and detailed description.
Embodiment 1：
As shown in Figure 1, a kind of zinc cation desulfurizer based on acidophilia biological desulphurization bacterium, it includes washing for removal hydrogen sulfide
Wash tower 1, biooxidation reactions device 2, sedimentation basin 3, anaerobic reactor 4 and regulating reservoir 5.It is set successively from top to bottom in scrubbing tower 1
There are demister 6, spray head 7, packing layer 8 and gas distribution pipe 9,1 bottom of scrubbing tower and the top of biooxidation reactions device 2 pass through promotion
Pump 10 and pipeline are connected；Dissolved oxygen electrode 18 and oxidation-reduction electrode 19, biooxidation reactions are equipped in biooxidation reactions device 2
2 top of device is connected with sedimentation basin 3 by pipeline and absorbing liquid overflow is made to enter sedimentation basin 3；The sedimentation basin 3 is closed container,
Lower part is divided into tapered structure, and bottom sets material outlet.Top is divided into two parts by the partition board of vertical arrangement, is provided on the left of partition board
Liquid-inlet, partition board right side are provided with overflow port.3 top of sedimentation basin passes through elevator pump 11 and pipeline with 4 bottom of anaerobic reactor
It is connected；4 top of anaerobic reactor is connected with 5 top of regulating reservoir by pipeline, and anaerobic reactor water outlet overflow enters adjusting
Pond 5；5 bottom of regulating reservoir is connected by elevator pump 12 and pipeline with the spray head 7 on 1 top of scrubbing tower, the absorbing liquid after adjusting
Boosted pump 12 enters the spray head 7 in scrubbing tower 1.Online pH electrodes 20 and online conductivity electrode 21 are equipped in regulating reservoir 5.
It is provided in 1 lower part of scrubbing tower containing H2S gas feeds 22, are provided with H at the top of anaerobic reactor2S gas vents 25, H2S gases
Outlet 25 is with containing H2S gas feeds 22 are connected by pipeline.Containing H2S gas feeds 22 extend in scrubbing tower 1 and gas distribution pipe 9
Connection.
In the anaerobic reactor, the sulfate of generation is reduced to S in the effect of sulfate reducing bacteria2-, so that pH
It is improved.Setting water distributor and three phase separator, sulfur-rich hydrochlorate is improved to ensure activated sludge concentration in anaerobic reactor
The efficiency of reducing bacteria flora.Three phase separator is made of sealing gland, settling zone and reflux seam three parts, mounted on anaerobic reactor
Anaerobic reactor is divided into the reaction zone of lower part and the settling zone on top by top, is played gas-liquid separation, separation of solid and liquid and sludge and is returned
The effect of stream.Packing layer 8 uses Pall ring or hollow ball filler.Lower part positioned at packing layer in the scrubbing tower is equipped with out
Liquid mouth and sewage draining exit.
The biooxidation reactions device is the reactor using inner ring gas lift-type air feeding in center, and inside reactor is without mixing
Device is mainly made of outer tube, central draft tube and gas distributor, and central draft tube and outer tube are set in concentric circles.Work as sky
After gas enters central draft tube by gas distributor, liquid is made to carry bubble under the momentum of static pressure difference and entrance gas
It is formed and circulated in reactor, so as to reach good gas-liquid mixed.Biooxidation reactions device top sets gas outlet
And liquid overflow pipe.
The regulating reservoir is closed container, is inside located at line conductivity electrode, online pH electrodes.
By above device, H in gas is removed2The technique of S gases is specific as follows:
（1）H2The S absorption stages：Gas is by containing H2S gas feeds 22 enter from 1 bottom of scrubbing tower, with from the top of scrubbing tower 1 into
The absorbing liquid counter current contacting entered, H2S is absorbed by liquid absorption, and clean gas is discharged from purified gas outlet 23.
（2）Aerobe oxidation stage:The boosted pump 10 of absorbing liquid of 1 bottom of scrubbing tower is sent into biooxidation reactions device 2,
S2-Simple substance S is mostly oxidised under the action of acidophilia biological desulphurization bacterium, small part is oxidized to SO4 2-.Suction after oxidation
It receives liquid and enters sedimentation basin 3, the elemental sulfur after precipitation is discharged through leakage fluid dram 24, is refined.Biooxidation reactions are used by domestication
Acidophilia biological desulphurization mixed bacterial, at 35 DEG C, the start-stop and air mass flow of air pump 13 restore electricity by on-line oxidation for temperature control
Position is controlled, and oxidation reduction potential control is stablized in -250~-100mV, pH 2~3.5.
（3）The anaerobic reduction stage:The boosted pump 11 of supernatant in sedimentation basin 3 is fed from below into anaerobic reactor 4, anaerobism
Reactor 4 uses the i.e. rich sulfate reducing bacteria flora of amphimicrobian Mixed Microbes based on sulfate reducing bacteria, during hydraulic retention
Between be 10-15 hours.SO4 2-It is reduced to S again under the action of rich sulfate reducing bacteria flora2-, absorbing liquid obtain part also
Original, pH get a promotion, and contain H2The gas of S is from H2S gas vents 25 are flowed back into containing H2S gas feeds 22 are handled again.
（4）Absorbing liquid adjusts the reuse stage:Absorbing liquid by anaerobic bio-treated is pumped up entering regulating reservoir, according to setting
Online pH electrodes 20 and online conductivity electrode 21 in regulating reservoir output signal to pH on-line monitoring units and conductivity exists
Line monitoring unit, pH on-line monitoring units and conductivity on-line monitoring unit control lye dosing pump 16 and nutrient solution dosing pump
17, by controlling conductivity range in 30-90mS/cm, pH ranges are in 8-9, to control the start-stop of dosing pump.Absorption after adjusting
The boosted pump 12 of liquid enters the spray head 7 in scrubbing tower.
Dosing pump includes lye dosing pump 16 and nutrient solution dosing pump 17；The lye that uses of pH adjustings can be NaOH or
NaCO3。
The present embodiment carries out H using acidophilia sulfur oxidizing bacterium flora2S oxidation processes.
Desulphurization Strains are derived from leather treatment plant wastewater treatment sludge, and culture medium is tamed by desulfurization（KH2PO4, 2.0g/L；
K2HPO4, 2.0 g/L；NH4Cl, 0.4 g/L；MgCl2·6H2O, 0.2 g/L；FeSO4·7H2O, 0.01 g/L；Na2S, 2-8
g/L）Domestication.
Using Na2S E-tests tame acidophilia sulfur oxidizing bacterium flora.Sludge is taken to stand supernatant 200ml and is put into dress
In the wide-mouth bottle for having 2000ml cycle liquid culture mediums, ventilation culture.Substrate（Na2S）Initial concentration is 2g/L, treats that pH is down to 2.5
Hereinafter, standing 30 minutes, upper solution 200ml is poured out, is put into the wide-mouth bottle equipped with 2000m l cycle liquid culture mediums, ventilation
Culture.Repeat above step, substrate（Na2 S）Concentration gradually rises to 8g/L by 100% increasing velocity from 2g/L.Biomass reaches
Biomass is finally reached about 1 × 107A/ml.
Rich sulfate reducing bacteria flora is by municipal sewage plant anaerobic sludge, through taming culture medium（K2HPO4, 0.5g/L；
NH4Cl, 1.0g/L；CaCl2·2H2O, 0.1g/L；MgSO4·7H2O, 2.0g/L；Yeast extract, 1g/L；70% sodium lactate solution,
4ml/L；Na2SO4,0.5g/L；Fe（NH4）2（SO4）2,1.2g/L；Ascorbic acid, 0.5g/L）It is tamed under 35 DEG C, anaerobic condition
And it obtains.
Using bio-desulfurization device described herein, nutrient solution composition is：KH2PO4, 2.0g/L；K2HPO4, 2.0 g/L；
NH4Cl, 0.4 g/L；MgCl2·6H2O, 0.2 g/L；FeSO4·7H2O, 0.01 g/L；Adjusting air aeration amount makes redox
Control of Electric potentials is in -190mV, continuous operation 30 days, and pH stablizes in 2.2-2.3 in bioreactor.Bioreactor operating load
150kgS/m3During d, S2-Removal rate is up to more than 95%.
Embodiment 2：
The present embodiment part same as Example 1 repeats no more, and the difference lies in carried out using neutral sulfur oxidizing bacterium flora
H2S processing.
Desulphurization Strains are derived from leather treatment plant wastewater treatment sludge, and culture medium is tamed by desulfurization（KH2PO4, 2.0g/L；
K2HPO4, 2.0 g/L；NH4Cl, 0.4 g/L；MgCl2·6H2O, 0.2 g/L；FeSO4·7H2O, 0.01 g/L；Na2S, 2-8
g/L）Domestication；
Using Na2The neutral sulfur oxidizing bacterium flora of S E-tests domestication.Sludge standing supernatant 200ml is taken to be put into be equipped with
In the wide-mouth bottle of 2000ml cycle liquid culture mediums, ventilation culture.Substrate（Na2S）Initial concentration is 2g/L.After 3 days, 30 are placed
Minute, upper solution 200ml is poured out, is put into the wide-mouth bottle equipped with 2000ml cycle liquid culture mediums.It is repeated once within every 3 days, bottom
Object（Na2 S）Concentration gradually rises to 8g/L by 100% increasing velocity from 2g/L.Control loop liquid pH is not less than 6 during domestication,
Biomass is finally reached about 1 × 107A/ml.
Using bio-desulfurization device described herein, nutrient solution composition is： KH2PO4, 2.0g/L；K2HPO4, 2.0 g/L；
NH4Cl, 0.4 g/L；MgCl2·6H2O, 0.2 g/L；FeSO4·7H2O, 0.01 g/L；Adjusting air aeration amount makes redox
Control of Electric potentials is in -190mV, continuous operation 30 days, and pH stablizes in 6.5-7.0 in bioreactor.Bioreactor operating load
15kgS/m3During d, S2-Removal rate is up to more than 94%.
Embodiment 3：
The present embodiment part same as Example 1 repeats no more, and the difference lies in adjusting air aeration amount makes redox electric
Position control is in -270mV, continuous operation 30 days.Since oxidation-reduction potential is too low, lead to S2-Aoxidize insufficient, bioreactor
Interior pH stablizes in 3.6-4.0, is unfavorable for acidophilia sulfur oxidizing bacterium to S2-Oxidation process.Bioreactor operating load 25kgS/
m3During d, S2-Removal rate is up to more than 95%.
Embodiment 4：
The present embodiment part same as Example 1 repeats no more, and the difference lies in adjusting air aeration amount makes redox electric
Position is controlled in -80mV, continuous operation 30 days, and pH stablizes in 1.5-1.8 in bioreactor.Bioreactor operating load
100kgS/m3During d, S2-Removal rate is up to more than 95%.
Embodiment 5：
The present embodiment part same as Example 1 repeats no more, and the difference lies in using acidophilic thiobacillus sulfur oxide sulphur bar
Bacterium Acidithiobacillus thiooxidans（ATCC 19377）Carry out H2S oxidation processes.
Using bio-desulfurization device described herein, culture medium composition is (NH4)2SO4, 0.3 g/L；K2HPO4, 3.5 g/L；
MgSO4·7H2O, 0.5 g/L；CaCl2, 0.25 g/L；FeSO4·7H2O 0.01 g/L；Adjusting air aeration amount makes oxidation also
Former current potential is controlled in -156mV, continuous operation 30 days, and pH stablizes in 2.1-2.2 in bioreactor, and bioreactor operation is born
Lotus 186kgS/m3D, S2-Removal rate is up to more than 97%.
Embodiment 6：
The present embodiment part same as Example 1 repeats no more, and the difference lies in using neutral Thiobacillus grate sulfur thiobacillus
Thiobacillus thioparus Beijerinck（ATCC 8158）Carry out H2S oxidation processes.
Using bio-desulfurization device described herein, culture medium composition is Na2HPO4, 1.2 g/L；KH2PO4, 1.8 g/L；
MgSO4 ·7H2O, 0.1 g/L；(NH4)2SO4, 0.1 g/L；CaCl2, 0.03 g/L；FeCl3, 0.02 g/L；MnSO4, 0.02
g/L；Adjusting air aeration amount makes oxidation reduction potential control in -160mV, continuous operation 30 days, pH stabilizations in bioreactor
In 6.5-6.7, bioreactor operating load 22kgS/m3D, S2-Removal rate is up to more than 95%.
Claims (9)
1. a kind of zinc cation desulfurizer based on acidophilia biological desulphurization bacterium, it is characterized in that it includes washing for removal hydrogen sulfide
Wash tower, biooxidation reactions device, sedimentation basin, anaerobic reactor and regulating reservoir；It is equipped with foam removal successively from top to bottom in scrubbing tower
Device, spray head, packing layer and gas distribution pipe, wash tower bottoms are connected with the top of biooxidation reactions device by elevator pump and pipeline
It is logical；Being connected at the top of biooxidation reactions device by pipeline with sedimentation basin makes absorbing liquid overflow enter sedimentation basin；Biological oxidation is anti-
It answers and dissolved oxygen electrode and oxidation-reduction electrode is equipped in device；The sedimentation basin is closed container, and lower part is divided into tapered structure, and bottom is set
Material outlet；Top is divided into two parts by the partition board of vertical arrangement, and liquid-inlet is provided on the left of partition board, is provided on the right side of partition board
Overflow port；It is connected at the top of sedimentation basin with anaerobic reactor bottom by elevator pump and pipeline；Anaerobic reactor top is with adjusting
Pond top is connected by pipeline, and anaerobic reactor water outlet overflow enters regulating reservoir；Regulating reservoir bottom passes through elevator pump and pipeline
It is connected with the spray head on scrubbing tower top；Online pH electrodes and online conductivity electrode are equipped in regulating reservoir；Under scrubbing tower
Portion is provided with containing H2S gas feeds, are provided with H at the top of anaerobic reactor2S gas vents, H2S gas vents are with containing H2S gases
Import is connected by pipeline；Containing H2S gas feeds are extended in scrubbing tower and are connected with gas distribution pipe.
2. the zinc cation desulfurizer according to claim 1 based on acidophilia biological desulphurization bacterium, it is characterized in that in institute
It states in scrubbing tower and is equipped with liquid outlet and sewage draining exit positioned at the lower part of packing layer.
3. the zinc cation desulfurizer according to claim 1 based on acidophilia biological desulphurization bacterium, it is characterized in that filler
Layer uses Pall ring or hollow ball filler.
4. the zinc cation desulfurizer according to claim 1 based on acidophilia biological desulphurization bacterium, it is characterized in that described
Biooxidation reactions device is the reactor using inner ring gas lift-type air feeding in center, it includes outer tube, central draft tube and gas
Distributor, central draft tube and outer tube are set in concentric circles；Biooxidation reactions device top sets gas outlet and liquid flooding
Pipe.
5. the zinc cation desulfurizer according to claim 1 based on acidophilia biological desulphurization bacterium, it is characterized in that described
Acidophilia biological desulphurization bacterium bag includes acidophilia sulfur oxidizing bacterium flora or single acidophilia sulfur oxidizing bacterium bacterial strain.
6. the zinc cation desulfurizer according to claim 1 based on acidophilia biological desulphurization bacterium, it is characterized in that described
Setting water distributor and three phase separator in anaerobic reactor, three phase separator are made of sealing gland, settling zone and reflux seam three parts,
Anaerobic reactor mounted on the top of anaerobic reactor is divided into the reaction zone of lower part and the settling zone on top, plays gas-liquid point
Effect from, separation of solid and liquid and sludge reflux.
7. the zinc cation desulfurizer according to claim 1 based on acidophilia biological desulphurization bacterium, it is characterized in that described
Regulating reservoir is closed container.
8. a kind of zinc cation sulfur method based on acidophilia biological desulphurization bacterium based on claim 1 described device, special
Sign is that it includes the following steps：
（1）H2The S absorption stages：Gas is by containing H2S gas feeds enter from wash tower bottoms, with the entrance at the top of scrubbing tower
Absorbing liquid counter current contacting, H2S is absorbed by liquid absorption, and clean gas is discharged from purified gas outlet；
（2）Aerobe oxidation stage:The absorbing liquid of wash tower bottoms is boosted to be pumped into biooxidation reactions device, S2-In acidophilus
Elemental sulfur is mostly oxidised under the action of property biological desulphurization bacterium, small part is oxidized to SO4 2-；Absorbing liquid after oxidation into
Enter sedimentation basin, the elemental sulfur after precipitation is discharged through leakage fluid dram, is refined；Biooxidation reactions use the acidophilia biology by domestication
Desulfurization bacterium, temperature are controlled at 35 DEG C, and the start-stop and air mass flow of air pump are controlled by on-line oxidation reduction potential, redox
Control of Electric potentials is stablized in -250~-100mV, pH 2~3.5；
（3）The anaerobic reduction stage:The boosted pump of supernatant in sedimentation basin fed from below into anaerobic reactor, adopt by anaerobic reactor
To the amphimicrobian Mixed Microbes based on sulfate reducing bacteria, hydraulic detention time is 10-15 hours；SO4 2-In sulfate reduction
It is reduced to S again under the action of bacterium2-, absorbing liquid obtains partial reduction, and pH gets a promotion, and contains H2The gas of S is from H2S gases
Outlet return is to containing H2S gas feeds are handled again；
（4）Absorbing liquid adjusts the reuse stage:Absorbing liquid by anaerobic bio-treated is pumped up entering regulating reservoir, is adjusted according to being located at
Online pH electrodes and online conductivity electrode in section pond output signal to pH on-line monitoring units and conductivity on-line monitoring is single
Member, pH on-line monitoring units and conductivity on-line monitoring unit control lye dosing pump and nutrient solution dosing pump, by controlling electricity
Conductance range is in 30-90mS/cm, and pH ranges are in 8-9, to control the start-stop of lye dosing pump and nutrient solution dosing pump；After adjusting
Absorbing liquid it is boosted pump enter scrubbing tower in spray head.
9. the zinc cation sulfur method according to claim 8 based on acidophilia biological desulphurization bacterium, it is characterized in that pH tune
It is NaOH or NaCO to save the lye used3。
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| CN109126410A (en) * | 2018-11-02 | 2019-01-04 | 山西资环科技股份有限公司 | A kind of biological desulfurization process for biogas |
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