CN105498470A - Microorganism desulfurizing and sulfur recycling method - Google Patents
Microorganism desulfurizing and sulfur recycling method Download PDFInfo
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- CN105498470A CN105498470A CN201410497183.2A CN201410497183A CN105498470A CN 105498470 A CN105498470 A CN 105498470A CN 201410497183 A CN201410497183 A CN 201410497183A CN 105498470 A CN105498470 A CN 105498470A
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Abstract
A microorganism desulfurizing and sulfur recycling method. A gas material flow containing hydrogen sulfide is fed into an absorption column and then is subjected to chemical absorption with an alkali solution sprayed from the top of the column in a counter-contact manner, wherein treated purified gas is discharged out from the top of the absorption column. A back-washing apparatus is arranged in the absorption column to wash the sulfur attached to a filling material. A rich solution, in which the hydrogen sulfide is dissolved, is fed into a rich solution tank from the bottom of the absorption column and then is fed into a bio-reactor for aeration, so that a carrier, on which desulfurization bacteria is immobilized, is fluidized and the sulfide in the absorption solution is biologically oxidized to generate elementary sulfur. The regenerated solution containing the sulfur then is fed into a settling tank through an overflow weir of the bio-reactor and a supernatant liquid is fed into a barren solution tank. The supernatant liquid then is fed back to the absorption column for being recycled through a barren solution pump. Sulfur slurry in the bottom layer is discharged through the bottom of the settling tank and then is subjected to solid-liquid separation in a centrifugal machine to obtain biological sulfur. A separated filtrate is fed back to the bio-reactor for being recycled. The bio-desulfurization technology is green and environment-friendly, is energy-saving and emission-reducing and can recycle resources, and has social, economical and environmental benefits.
Description
Technical field
The invention belongs to Technology for Microbial Desulfurization, be applied to environmental purification field, relate in particular to a kind of method of bacterial desulfurization and sulphur recovery, be mainly used in the biogas desulfurization of big-and-middle-sized biogas engineering, also can be used for the purified treatment of the gaseous fluid containing hydrogen sulfide such as natural gas, process gas and industrial waste gas, the recovery of elemental sulfur can be realized simultaneously.
Background technology
Biogas is biomass energy, belongs to regenerative resource.Due to containing H in biogas
2s, under wet heat condition, has very strong corrosivity to metallic conduit, gas storage holder and gas equipment.And when biogas combustion, H
2s also can be converted into SO
2and SO
3, not only pollute the environment, but also meeting etching apparatus, so biogas needs to remove the H wherein contained before use
2s.From economic indicator and treatment effect Comprehensive Assessment, when latent sulfur content is less than 0.1t/d, dry desulfurization is comparatively applicable; When latent sulfur content is greater than 50t/d, amine method+claus process just can fully demonstrate economic benefit; When latent sulfur content occupy therebetween, at home and abroad comparatively ideal mode often adopts liquid phase oxidation reduction and desulfurization technology to process at present.But the major defect of liquid phase oxidation reduction is chemical cost height and sulphur easily occurs to block up, and also have the generation of industrial wastes, this certainly will cause the increase of running cost and the decline of sulphur analysis.
By comparison, biological desulphurization is a kind of new technology of alternative chemical desulfurization, and it can overcome the deficiency of chemical desulfurization in a lot.Biological desulphurization because of its have pollution less, low energy consumption, the feature such as high efficiency, become study hotspot.Biological desulphurization refers to and utilizes the biological oxidation of sulfur bacteria that the Oxidation of Hydrogen Sulfide in biogas is become elemental sulfur or sulfuric acid, thus the technique that sulphur is removed from biogas.At the alkali that absorption process consumes, acted in bioreactor by microorganism catalysis and recovered, reduce the consumption of chemicals; The sulphur generated has hydrophily, and not easily cause sulphur to block up, hydrophilic sulphur also can do agrochemical and pesticide, improves added value.
The key of bacterial desulfurization and recovery technology of sulfur is 2 points: one, the partial oxidation of sulfide must carry out under the condition of restriction oxygen (redox potential-100mV ~-400mV), otherwise sulfide will be fully oxidized as sulfate; Two, elemental sulfur will be separated in time, avoids inside reactor to precipitate and causes blocking, ensure reactor long-time steady operation.At present, biological desulfurization apparatus and technique can not meet above two requirements simultaneously.Disclose in Chinese patent CN1775344A " biological desulfurizer and dry desulfurizer treating method of high concentration hydrogen sulfide gas ", the H produced when this desulphurization system is run
2sO
4the pH value of circulation fluid is reduced fast, reduces to 2.5 ~ 3.0 by initial 8.0, highly acid absorbing liquid has stronger corrosivity to equipment, requires higher, also need often to change absorbing liquid to the corrosion resistance of desulphurization plant.Chinese patent CN101703883A discloses " removing method and the device of hydrogen sulfide in biogas ", this patent main equipment is bubbling column plate absorption oxidation device, though there is advantage that is quick, high-efficiency desulfurization, but the defects such as bubble tower has that mass transfer rate is slow, air feed efficiency is low and energy consumption is high, cause bubble tower commercial introduction to be applied and are restricted.Chinese patent CN101703883A discloses " a kind of gas-lifting type biological desulphurization reactor and sulfur method ", and this patent main equipment is gas-lifting type biological desulphurization reactor, for organic sulfide removal in fuel oil, but not for the treatment of H in biogas
2s.Chinese patent CN203090734U discloses " a kind of two-part methane bio-desulfurization device ", the method has can eliminate the advantages such as the high and stable operation of biogas potential safety hazard, desulfuration efficiency, but this bioreactor is aeration type regenerator, dissolved oxygen skewness, cause sulfate by-products relatively high, and mass transfer effect is poor, energy consumption is high, engineer applied is subject to certain restrictions.
Summary of the invention
In order to solve in prior art, desulfuration efficiency is low, cost is high, the high deficiency of desulfuration efficiency poor stability, energy consumption, the object of the invention is to the technique proposing a kind of biological desulphurization process for sulphide-rich gas, be specifically to provide and a kind ofly use the bacterial desulfurization of high-efficiency internal circulation airlift bioreactor for sulfur compound chemical industry tail gas, natural gas or biogas and the method for sulphur recovery.Utilize processing method of the present invention, biological desulphurization requirement can not only be met, sulfide-oxidation can also be solved and produce the difficult problem of elemental sulfur, and industrialization can be applied to process continuously on a large scale.
Technological thought of the present invention is: by chemical absorbing-biological oxidation coupling purification technology, proposes a kind ofly sulfur-containing compound in unstripped gas, waste water to be removed and be converted into the bacterial desulfurization of elemental sulfur and the method for sulphur recovery.Reach elemental sulfur by high-efficient biological reactor and integrated automatic controller to reclaim and absorbing liquid recycles, thus the pollution of effective solution hydrogen sulfide, realize changing waste into resources, and finally reach the unification of environmental benefit and economic benefit.
Main technical schemes of the present invention: a kind of method of bacterial desulfurization and sulphur recovery, comprises chemical absorption unit, biological oxidation unit and sulphur recovery unit.It is characterized in that: chemical absorption unit passes into hydrogen sulfide wherein by weakly alkaline solution chemical absorbing; Biological oxidation unit essence is internal circulation gas-lift type biological fluidized-bed reactor, and by the rich solution of absorbing hydrogen sulphide under aeration condition, realizing Sulfide Biological Oxidation is elemental sulfur and alkali liquid regeneration; Sulphur recovery unit be used for by sulphur slurries through sedimentation, rotary process, realize elemental sulfur reclaim.
Usually, to be H 2 S-containing gas fluid from air inlet enter the inventive method that alkali lye that absorption tower and tower top spray is reverse contacts chemical absorbing, and the purified gas processed leaves from top, absorption tower.In absorption tower, back purge system is set, cleaning filler adheres to sulphur.The rich solution being dissolved with hydrogen sulfide enters rich solution groove bottom absorption tower, enters bioreactor via rich solution pump.Carry out aeration by air blast, realize the carrier fluidization of fixing Desulphurization Strains, the Sulfide Biological Oxidation in absorbing liquid generates elemental sulfur.Sulfureted regenerated liquid enters subsider through bioreactor downflow weir, and supernatant liquor enters lean solution groove, returns to absorption tower recycle via lean pump.Lower floor's sulphur slurries are discharged by bottom subsider, in centrifuge, realize Separation of Solid and Liquid, obtain biological sulphur.Isolated filtrate turns back in bioreactor again, re-uses.In addition, periodic exhaustion part nutrient solution waste liquid, and fresh nutrient solution is supplemented in circulation fluid storage tank.
Further, in described absorption tower, there are cascade ring or Pall ring filler, for increasing gas-liquid mass transfer efficiency, between two packing layers, are also provided with liquid distribution trough.
Further, in described absorption tower, flusher is set, regularly to absorbing the sulphur precipitation wash-out that inner-tower filling material adheres to, washs turbid liquid and discharging from sewage draining exit.
Further, in described absorption tower, charge flow rate and liquid circulation amount volume ratio are 10 ~ 100:1.
Further, described bioreactor is internal circulation gas-lift type reactor, air stirring replaces traditional mechanical agitation, reduce energy consumption, there is good fluidized state and oxygen transfer rate, be not only sulphidic conversion elemental sulfur and provide best reaction condition, and avoid the accumulation of elemental sulfur in reactor to cause blocking.
Further, add active carbon or the biological ceramic particle of 0.5 ~ 2% in described bioreactor, under 30oC environment, carry out the Immobilized culture of 6 ~ 8 days, make Thiobacillus cover with fixation support.
Further, the flow velocity blasting air in described bioreactor is 5% ~ 30% of sulfide hydrogen waste gas flow velocity.
Further, described bioreactor inner top arranges three phase separator, is efficiently separated for gas, liquid, solid three-phase, bacterial classification can be prevented to run off simultaneously.
Are several technical characteristics of red font the need of in write claim above?
Be in operation and need ensure the vigor of desulfurization flora by controlling some parameters, the nutriment that these parameters comprise the temperature of circulation fluid, the pH value of circulation fluid, oxidation-reduction potential and need add.
Further, described circulation fluid is Na
2cO
3/ NaHCO
3solution or Na
2cO
3/ NaHCO
3solution mixes with by several nutrient solutions in ammonium sulfate, potassium chloride, potassium hydrogen phosphate, epsom salt, calcium nitrate, ammonium chloride, calcium chloride, ferrous sulfate heptahydrate the combination solution formed.
Further, effective flora in described circulation fluid is the desulfurization flora based on thiobacillus denitrificans, grate sulfur thiobacillus and Thiobacillus Thioparaus, and these two kinds of bacterium are alkaliphilic bacterium, with the sulfide of reduction-state for energy source, being nitrogenous source with ammonium nitrogen, take carbon dioxide as carbon source.
Further, the temperature of described circulation fluid controls between 20 ~ 40oC, preferably between 25 ~ 35oC.
Further, the pH value of described circulation fluid is between 8 ~ 9.
Further, the scope of the ORP oxidation-reduction potential of described circulation fluid is from-300mV to-390mV, preferably-340mV to-360mV.
Further, the electrical conductivity of described circulation fluid is between 30 ~ 100mS/cm.
Further, when the electrical conductivity of described circulation fluid is more than 100mS/cm, need discharge sulfate waste liquid and supplement above-mentioned fresh nutrient solution, adjust ph is between 8 ~ 9 simultaneously, to maintain system stable operation.
Further, in described circulation fluid, one or more materials added in aluminium polychloride, polyacrylamide, neopelex or dodecyl phenenyl sulfate are biological sulfur modifier, its weight range at 10 ~ 100ppm, for increasing its particle diameter, with Accelerated subsidence speed.
Compared with prior art, the present invention adopts double-reactor (i.e. absorption tower and bioreactor), avoids current biological filtering tank process and can introduce the hidden danger that air produces blast in biogas.And high-efficiency internal circulation airlift bioreactor has good fluidized state and oxygen transfer rate, be not only sulphidic conversion elemental sulfur and provide best reaction condition, and avoid the accumulation of elemental sulfur in reactor to cause blocking.The invention has the beneficial effects as follows: flow process is simple, easy and simple to handle, operating cost is low, non-secondary pollution.Hydrogen sulfide is oxidized to sulfate, avoids directly generating sulfur dioxide and causes secondary pollution, and desulfuration efficiency is higher than 90%, and the biogas after process reaches later use requirement.
The art of this patent is by integrating the multinomial new and high technologies such as the proprietary breeding strain of waste gas purification, biological fluidized bed, carrier immobilized colonization method, internal circulation gas-lift type reactor, PLC Automated condtrol, not only for improving China's energy resource structure, ensure that national energy security system has certain realistic meaning, and can effectively utilize bio-waste to realize biogas recycling, there is " with waste becoming treasure " and " recycling economy " characteristic, promote the optimumization development of municipal sewage treatment, while producing considerable green energy resource, also reduce environmental pollution, realize green low-carbon.The environmental protection of biological desulphurization industry, energy-saving and emission-reduction, resource reclaim have society, the triple benefit of economy and environment.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of bacterial desulfurization and sulphur recovery;
In figure, 1-packed absorber, 2-bioreactor, 3-subsider, 4-rich solution groove, 5-lean solution groove, 6-Rinsing Area, 7-centrifuge, 8-sulphur recovery groove, 9-lean pump, 10-rich solution pump, 11-bio-natural gas air inlet, 12-purified gas gas outlet, 13-lean solution enters absorption tower mouth, 14-rich solution goes out absorption tower mouth, 15-clear water mouth spray, 16-filler, 17-liquid distribution trough, 18-demister, 19-absorption tower sewage draining exit, 20-rich solution enters rich solution notch, 21-rich solution goes out rich solution mouth, 22-rich solution enters bioreactor mouth, 23-is containing sulphur regenerated liquid downflow weir, 24-air inlet, 25-air outlet, 26-reactor body district, 27-guide shell, 28-urceolus, 29-three-phase separation area, 30-isolating cylinder, 31-baffle plate, 32-air blast, 33-air aeration device, 34-temp probe, 35-pH pops one's head in, 36-ORP pops one's head in, 37-conductivity probe, 38-discard solution discharge port, 39-filtrate is refluxed into bioreactor mouth, 40-semi soft packing, 41-mass air flow sensor, 42-parametric controller, 43-overflowing liquid enters sedimentation notch, 44-supernatant exports, 45-sulphur serum outlet, 46-hexagon cellular inclined tube, 47-lean solution enters lean solution notch, 48-lean solution goes out lean solution notch, 49-solution mouth, 50-fluid flowmeter, 51-clear water output, 52-clear water charge door, 53-sulphur slurries enter centrifuge mouth, 54-filtrate goes out centrifuge mouth, 55-sulphur discharging opening.
Detailed description of the invention
Be described in further details below in conjunction with the content of the drawings and specific embodiments to patent of the present invention.
As shown in Figure 1, the invention process is realized by two segment type biological desulfurization and sulfur recovery facility, comprises the equipment composition such as absorption tower 1, bioreactor 2, subsider 3, rich solution groove 4, lean solution groove 5, Rinsing Area 6, centrifuge 7, sulphur recovery groove 8, lean pump 9, rich solution pump 10 removing hydrogen sulfide.Be connected by pipeline bottom absorption tower 1 with bottom rich solution groove 4, top, absorption tower 1 is connected by lean pump 9 and pipeline with bottom lean solution groove 5 or Rinsing Area 6, be connected by rich solution pump 10 and pipeline with bottom bioreactor 2 bottom rich solution groove 4, bioreactor 2 top is connected by pipeline with subsider 3, and subsider 3 top is connected by pipeline with bottom lean solution groove 5 and bioreactor 2.
The running of this device is as follows:
During startup, containing H
2the bio-natural gas of S enters into after the reverse haptoreaction of alkali lye that absorption tower and tower top spray absorbs from air inlet, and the purified gas processed leaves from top, absorption tower.Arrange Flushing nozzle in absorption tower in addition, enter via Rinsing Area, cleaning packing layer, scrub raffinate is discharged by sewage draining exit.Be dissolved with H
2the rich solution of S enters rich solution groove bottom absorption tower, then under the effect of rich solution pump, enters internal circulation gas-lift type biological fluidized-bed reactor.In bioreactor, dissolvable sulfide carries out aeration (being blown into the abundant mixing being conducive to various composition in bioreactor of air) by air blast to it, realize the carrier fluidization of fixing Desulphurization Strains, sulfide in absorbing liquid generates elemental sulfur under the oxidation of colorless sulfur bacteria, the in-line meters such as temp probe, ORP probe, pH probe and conductivity probe are installed to control the parameters such as temperature in bioreactor, pH value, ORP value and conductivity value in bioreactor, transfer data to parametric controller, realize the Automated condtrol of system core parameter.Sulfureted regenerated liquid enters subsider through bioreactor downflow weir, and supernatant liquor overflow enters lean solution groove, then under lean pump effect, enters absorption tower and recycles.Lower floor's sulphur slurries are discharged by bottom subsider.Sulphur slurries carry out centrifugally realizing Separation of Solid and Liquid in centrifuge, obtain the biological sulphur of product.Isolated liquid phase filtrate turns back in bioreactor again, re-uses.
Embodiment 1: immobilization Thiobacillus process
With Na
2s
2o
35 ~ 10g/L, KNO
35 ~ 10g/L, NaHCO
32g/L, KH
2pO
40.1g/L culture medium 30oC cultivates 2 days, simultaneously every 4h appropriateness aeration, Thiobacillus group is magnified cultivation, then the biological ceramic particle dropping into 0.5% is carrier, Thiobacillus group is adhered to be immobilized onto on carrier, continues above-mentioned cultivation 6 ~ 8 days, makes Thiobacillus group be attached to carrier in a large number, the biomass adhered to of weighing is 1.263mg/g, completes immobilization process.
Embodiment 2 gaseous bio sweetening process
Simulation H 2 S-containing gas content (v/v): 4%H
2s, 96%N
2.
With Na
2cO
3/ NaHCO
3solution is absorbing liquid, adds Na simultaneously
2s
2o
38g/L, KNO
35g/L, NaHCO
32g/L, KH
2pO
40.1g/L is nutrient solution, circulation fluid pH value is regulated to be 9.0, the neopelex adding 30ppm is sulfur modifier, when reaction temperature is 30oC, when absorption tower gas liquid ratio is 10:1, when in bioreactor, ORP value is-340mV, circulation fluid electrical conductivity is 40mS/cm, desulfurization degree is 99.8%, and sulfur recovery rate is 98.2%.
Embodiment 2-1 gaseous bio sweetening process
Simulation H 2 S-containing gas content (v/v): 4%H
2s, 96%N
2.
With Na
2cO
3/ NaHCO
3solution is absorbing liquid, adds Na simultaneously
2s
2o
38g/L, KNO
35g/L, NaHCO
32g/L, KH
2pO
40.1g/L is nutrient solution, circulation fluid pH value is regulated to be 8.0, the neopelex adding 10ppm is sulfur modifier, when reaction temperature is 25oC, when absorption tower gas liquid ratio is 50:1, when in bioreactor, ORP value is-300mV, circulation fluid electrical conductivity is 30mS/cm, desulfurization degree is 92.1%, and sulfur recovery rate is 93.4%.
Embodiment 2-2 gaseous bio sweetening process
Simulation H 2 S-containing gas content (v/v): 4%H
2s, 96%N
2.
With Na
2cO
3/ NaHCO
3solution is absorbing liquid, adds Na simultaneously
2s
2o
38g/L, KNO
35g/L, NaHCO
32g/L, KH
2pO
40.1g/L is nutrient solution, circulation fluid pH value is regulated to be 8.5, the neopelex adding 30ppm is sulfur modifier, when reaction temperature is 35oC, when absorption tower gas liquid ratio is 20:1, when in bioreactor, ORP value is-350mV, circulation fluid electrical conductivity is 40mS/cm, desulfurization degree is 98.6%, and sulfur recovery rate is 97.6%.
Embodiment 2-3 gaseous bio sweetening process
Simulation H 2 S-containing gas content (v/v): 4%H
2s, 96%N
2.
With Na
2cO
3/ NaHCO
3solution is absorbing liquid, adds Na simultaneously
2s
2o
38g/L, KNO
35g/L, NaHCO
32g/L, KH
2pO
40.1g/L is nutrient solution, circulation fluid pH value is regulated to be 9.0, the neopelex adding 20ppm is sulfur modifier, when reaction temperature is 28oC, when absorption tower gas liquid ratio is 30:1, when in bioreactor, ORP value is-360mV, circulation fluid electrical conductivity is 60mS/cm, desulfurization degree is 95.3%, and sulfur recovery rate is 96.5%.
Embodiment 2-4 gaseous bio sweetening process
Simulation H 2 S-containing gas content (v/v): 4%H
2s, 96%N
2.
With Na
2cO
3/ NaHCO
3solution is absorbing liquid, adds Na simultaneously
2s
2o
38g/L, KNO
35g/L, NaHCO
32g/L, KH
2pO
40.1g/L is nutrient solution, circulation fluid pH value is regulated to be 8.0, the neopelex adding 20ppm is sulfur modifier, when reaction temperature is 40oC, when absorption tower gas liquid ratio is 100:1, when in bioreactor, ORP value is-390mV, circulation fluid electrical conductivity is 80mS/cm, desulfurization degree is 85.4%, and sulfur recovery rate is 89.7%.
Embodiment 3: simulation sulfur-containing waste water biological desulphurization process
Simulated wastewater (mg/L): Na
2s600, NaHCO
320, K
2hPO
418, KNO
325, pH9.0
Reactor load is: 4.8kgS/ (m
3.d)
Oxidation-reduction potential :-350mV
Elemental sulfur production rate: 92%
Sulfide removal efficiency: >98%.
From embodiment 3, through process of the present invention, the sulfide of more than 98% is removed, and major part is recovered with elemental sulfur form, and elemental sulfur, as a kind of important Elementary Chemical Industry raw material, realizes the innoxious and recycling treatment of sulfide.
The method of the bacterial desulfurization that the present invention announces and sulphur recovery, not only may be used for the regeneration process of the H 2 S-containing gas alkaline process absorbing liquids such as natural gas, biogas or chemical industry tail gas, also can be used for the industrial sulphide-containing waste water process such as paper mill, tannery, also may be used for the regeneration process of the H 2 S-containing gas such as natural gas or chemical industry tail gas alkaline process absorbing liquid, generating biological sulphur in sweetening process is a kind of important chemical industry base stock, realizes the innoxious and recycling treatment of sulfide.Process sulphide-containing waste water sulfide content through this sulfur removal technology is down to below 0.01mM, reaches state sewage emission standard, realizes alkali regeneration, reusable edible while H 2 S-containing gas alkaline process absorbing liquid is removed sulfide.
Claims (13)
1. a method for bacterial desulfurization and sulphur recovery, comprises chemical absorption unit, biological oxidation unit and sulphur recovery unit, it is characterized in that: chemical absorption unit passes into hydrogen sulfide wherein by weakly alkaline solution chemical absorbing; Biological oxidation unit essence is internal circulation gas-lift type biological fluidized-bed reactor, and by the rich solution of absorbing hydrogen sulphide under aeration condition, realizing Sulfide Biological Oxidation is elemental sulfur and alkali liquid regeneration; Sulphur recovery unit be used for by sulphur slurries through sedimentation, rotary process, realize elemental sulfur reclaim.
2. the method for according to claim a kind of bacterial desulfurization and sulphur recovery, is characterized in that: sulfide hydrogen source of the gas enters from air inlet that alkali lye that absorption tower and tower top spray is reverse contacts chemical absorbing, and the purified gas processed leaves from top, absorption tower; Arrange back purge system in absorption tower, cleaning filler adheres to sulphur, and the rich solution being dissolved with hydrogen sulfide enters rich solution groove bottom absorption tower, enters bioreactor via rich solution pump; Carry out aeration by air blast, realize the carrier fluidization of fixing Desulphurization Strains, the Sulfide Biological Oxidation in absorbing liquid generates elemental sulfur; Sulfureted regenerated liquid enters subsider through bioreactor downflow weir, and supernatant liquor enters lean solution groove, returns to absorption tower recycle via lean pump; Lower floor's sulphur slurries are discharged by bottom subsider, in centrifuge, realize Separation of Solid and Liquid, obtain biological sulphur; Isolated filtrate turns back in bioreactor again, re-uses.
3. according to claim
1 or 2described bacterial desulfurization and the method for sulphur recovery, is characterized in that: circulation fluid is wherein Na
2cO
3/ NaHCO
3solution or Na
2cO
3/ NaHCO
3solution mixes with by several nutrient solutions in ammonium sulfate, potassium chloride, potassium hydrogen phosphate, epsom salt, calcium nitrate, ammonium chloride, calcium chloride, ferrous sulfate heptahydrate the combination solution formed.
4. according to claim
1 or 2described bacterial desulfurization and the method for sulphur recovery, is characterized in that: the pH value of circulation fluid is wherein between 8 ~ 9.
5. according to claim
1 or 2described bacterial desulfurization and the method for sulphur recovery, it is characterized in that: the effective flora in circulation fluid is wherein basophilla Thiobacillus (Thiobacillus) bacterium, is selected from one or more in grate sulfur thiobacillus, thiobacillus denitrificans and Thiobacillus Thioparaus.
6. according to claim
1 or 2described bacterial desulfurization and the method for sulphur recovery, is characterized in that: wherein the scope of ORP oxidation-reduction potential is from-300mV to-390mV.
7. according to claim
1or the method for bacterial desulfurization described in 2 and sulphur recovery, it is characterized in that: wherein the scope of ORP oxidation-reduction potential is from-340mV to-360mV.
8. according to claim
1or
2described bacterial desulfurization and the method for sulphur recovery, is characterized in that: wherein the electrical conductivity of circulation fluid is between 30 ~ 100mS/cm.
9. according to claim
1 or 2described bacterial desulfurization and the method for sulphur recovery, is characterized in that: wherein the temperature of bioreactor controls between 20 ~ 40oC.
10. according to claim
1or the method for bacterial desulfurization described in 2 and sulphur recovery, it is characterized in that: wherein the temperature of bioreactor controls between 25 ~ 35oC.
11. according to claim
1 or 2described bacterial desulfurization and the method for sulphur recovery, is characterized in that: the flow velocity wherein blasting air in bioreactor is 5% ~ 30% of sulfide hydrogen waste gas flow velocity.
12. according to claim
1 or 2described bacterial desulfurization and the method for sulphur recovery, is characterized in that: wherein add active carbon or the biological ceramic particle of 0.5 ~ 2% in bioreactor, carry out the Immobilized culture of 6 ~ 8 days, make Thiobacillus cover with fixation support under 30oC environment.
13. according to claim
1 or 2described bacterial desulfurization and the method for sulphur recovery, it is characterized in that: one or more materials wherein added in circulation fluid in aluminium polychloride, polyacrylamide, neopelex or dodecyl phenenyl sulfate are biological sulfur modifier, and its content range is at 10 ~ 100ppm.
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| CN107537293A (en) * | 2016-06-24 | 2018-01-05 | 中国石油化工股份有限公司 | A kind of closed cycle bacterial desulfurization and the method for reclaiming elemental sulfur |
| CN107673313A (en) * | 2017-09-30 | 2018-02-09 | 杨波 | The processing recovery process of sulfur waste sulphur in a kind of chloride |
| CN107983132A (en) * | 2017-12-25 | 2018-05-04 | 宜宾丝丽雅股份有限公司 | TRS clean system |
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| CN109908717A (en) * | 2019-03-26 | 2019-06-21 | 四川大学 | Biogas/natural gas biological desulfurization method of gas circulation biological bubble tower |
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| CN112295382A (en) * | 2019-08-02 | 2021-02-02 | 中国石油化工股份有限公司 | Absorption tower for treating hydrogen sulfide gas by wet oxidation method |
| CN110652864A (en) * | 2019-10-10 | 2020-01-07 | 南京清源生物工程有限公司 | For treating H2Biological desulfurization treatment device and process of S |
| CN110975555A (en) * | 2019-10-22 | 2020-04-10 | 广西博世科环保科技股份有限公司 | A new type of sewage station classification deodorization system and process |
| CN111170447B (en) * | 2020-01-15 | 2021-11-02 | 浙江永续环境工程有限公司 | Fluidized bed biofilm reactor based on composite desulfurization bacteria |
| CN111170447A (en) * | 2020-01-15 | 2020-05-19 | 浙江永续环境工程有限公司 | Fluidized bed biofilm reactor based on composite desulfurization bacteria |
| CN111330425A (en) * | 2020-03-11 | 2020-06-26 | 唐山绿源环保科技有限公司 | Biological desulfurization system of desorption high concentration hydrogen sulfide |
| CN111410371A (en) * | 2020-04-16 | 2020-07-14 | 浙江大学 | Oxygen-limited internal circulation biological desulfurization reactor and method |
| CN111410371B (en) * | 2020-04-16 | 2021-06-01 | 浙江大学 | Oxygen-limited internal circulation biological desulfurization reactor and method |
| TWI799026B (en) * | 2021-02-03 | 2023-04-11 | 財團法人工業技術研究院 | Biological desulfurization processing method and biological desulfurization processing system |
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