CN107899384A - A kind of Multistage desulfuration system and method - Google Patents

A kind of Multistage desulfuration system and method Download PDF

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Publication number
CN107899384A
CN107899384A CN201711170952.8A CN201711170952A CN107899384A CN 107899384 A CN107899384 A CN 107899384A CN 201711170952 A CN201711170952 A CN 201711170952A CN 107899384 A CN107899384 A CN 107899384A
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biogas
concentration
digester
air
fermentation tank
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孙颖杰
何捍东
黄捷
王晓辉
李俊涛
吴挺
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CHENGDU DETONG ENVIROMENT ENGINEERING Co Ltd
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CHENGDU DETONG ENVIROMENT ENGINEERING Co Ltd
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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
    • B01D53/46—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
    • B01D53/02—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 adsorption, e.g. preparative gas chromatography
    • 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
    • B01D53/30—Controlling by gas-analysis apparatus
    • 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
    • B01D53/76—Gas phase processes, e.g. by using aerosols
    • 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
    • B01D2251/00—Reactants
    • B01D2251/10—Oxidants
    • B01D2251/102—Oxygen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/10—Oxidants
    • B01D2251/11—Air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/102—Carbon
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Dispersion Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Gas Separation By Absorption (AREA)
  • Treatment Of Sludge (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention belongs to biogas desulfurization technical field, and in particular to a kind of Multistage desulfuration system and method.For in air sweetening technology in situ there are residual oxygen in biogas so as to cause biogas convey and use during there are the problem of risk, the technical scheme is that：Air sweetening technique in situ is first carried out in fermentation vat, biogas recirculation is made until O in biogas by air return system2Concentration is less than percentage by volume 1%.Then dry desulfurizing process is carried out in digester, on the one hand makes the H in biogas2The concentration of S further reduces, and on the other hand consumes the remaining O of air sweetening technique in situ2.For containing H in the biogas produced after fermentation2The concentration of S is higher than the situation of 3000ppm, can also carry out ferrous salt sulfur removal technology in situ.The present invention is suitable for fermentation and biogas production.

Description

A kind of Multistage desulfuration system and method
Technical field
The invention belongs to biogas desulfurization technical field, and in particular to a kind of Multistage desulfuration system and method.
Background technology
Organic waste particularly protein is degraded under anaerobic, usually can all generate hydrogen sulfide.Different fermentations are former Material, the concentration difference of hydrogen sulfide in methane is also larger, particularly chicken manure fermenting, and hydrogen sulfide in methane is at concentrations up to 5000- 6000ppm.And hydrogen sulfide is corrosive gas, pipeline, valve are seriously affected, the service life for the gas equipment that particularly purifies and generate electricity And safety.Therefore desulfurization is an important step in biogas production process.Traditional sulfur method includes dry desulfurization, wet method Several sulfur methods such as desulfurization, bioanalysis desulfurization.But dry desulfurization there are occupation area of equipment is big, continuity of operation not enough, The shortcomings of Sulfur capacity is low, desulfurizer regeneration is difficult；And there are one-time investment is more, desulphurization cost is higher, operational management for wet desulphurization Complicated and regeneration of absorption solution and replacement problem.Therefore, some new desulfurization processes are increasingly becoming the research hotspot of people, such as in situ Desulfurization (in situ air sweetening, the desulfurization of iron chloride original position) and new dystopy desulfurization (ferric trichloride absorption-electrochemical reduction regeneration skill Art, nitrification liquid denitrogenation coupling desulfurization).Since dystopy desulfurization is typically all in the additional desulfurizer in pond, chemical substance is utilized Or microbial metabolism removes the hydrogen sulfide gas in biogas, it is necessary to additional floor and there are the problems such as biogas loss.It is in situ Desulfurization is the generation of removal of hydrogen sulfide or suppression hydrogen sulfide while biogas produces, and has more preferable market prospects.
Existing original position air sweetening technology directly removes biogas by being passed through a certain amount of air or oxygen into fermentation tank Middle hydrogen sulfide.But the difficulty of air sweetening in situ is to need strictly to control oxygen-supplying amount, crossing the oxygen of low concentration can cause to take off Sulphur effect does not reach requirement；The oxygen of excessive concentrations can influence being normally carried out for anaerobic fermentation, and the oxygen of excessive concentrations with After the mixing of biogas combustible gas, there are hidden peril of explosion.And under conditions of strictly control oxygen-supplying amount, complete the natural pond after desulfurization All the time a certain amount of oxygen can be remained in gas, improves the risk during biogas conveying and use.
The content of the invention
For there are residual oxygen in biogas in above-mentioned air sweetening technology in situ so as to causing biogas to convey and used There are the problem of risk in journey, the present invention provides a kind of Multistage desulfuration system, its object is to：Multistage desulfuration technique is set, is led to Later continuous sulfur removal technology consumes the residual oxygen that air sweetening technique in situ produces, and while desulfurization effect is improved, disappears Except biogas conveying caused by residual oxygen and the risk during use.
It is a further object of the present invention to provide a kind of Multistage desulfuration method.
The technical solution adopted by the present invention is as follows：
A kind of Multistage desulfuration system, including fermentation tank, air injected system is provided with fermentation tank, and fermentation tank rear end is set There is digester, biogas analytical instrument is provided between fermentation tank and digester, is set between biogas analytical instrument and digester Air return system is equipped with, air return system is communicated with fermentation tank；Activated carbon or iron oxide are provided with the digester；Institute Biogas analytical instrument is stated to be used to detect O2Concentration.
After the technical solution, air or O are injected into fermentation tank by air injected system2, so that in fermentation tank It is middle to utilize O2Aoxidize H2S realizes air sweetening in situ.Then exported using biogas analytical instrument real time monitoring from fermentation tank O in biogas2Concentration.If O2It is dense, can also meet the technological requirement of air sweetening in situ, then utilize gas return Biogas recirculation is inputted in fermentation tank and reused by streaming system；If O2Concentration be less than the technological requirement of air sweetening in situ, then Input digester and carry out dry desulfurizing process.Dry desulfurization process is the H adsorbed using activated carbon or iron oxide in biogas2S, and O afterwards2The H that will be adsorbed2S is aoxidized.In dry desulfurizing process, activated carbon or iron oxide are by H2S is adsorbed onto surface, in solid and gas circle Catalytic action on face due to surface causes H2S is more prone to be aoxidized, therefore compared with air sweetening in situ, the one side work Skill can handle the H of lower concentration2S, the another aspect technique only need the O of very low concentrations2Can quickly it carry out.Traditional Dry desulfurization is usually independently operated, the H on the one hand wanting independent process high concentration2S, therefore filled out to increase biogas and activated carbon etc. The time of contact of material make it that equipment volume is bigger；On the other hand the technique has been only focused on to H2The reduction of S concentration, does not account for It can effectively consume the low concentration O in biogas2Advantage.
In the technical scheme, above two sulfur removal technology is mutually promoted.Utilize air sweetening in-situ treatment H in situ2S, So that H in biogas2S concentration substantially reduces, and then reuses dry desulfurization and further handles H2S, because H at this time2S concentration is It is very low, therefore the volume of digester is greatly reduced relative to when being used alone, and is reduced construction investment and is reduced operating cost.And Cause to remain O in biogas for air sweetening is introduced into2Caused safety issue, can just pass through follow-up dry desulfurization work Skill consumes O2To solve.
Preferably, fermentation tank front end is additionally provided with preparing pool, and medicine system is provided with preparing pool, and the medicine system is used In addition soluble ferrite.The preferred solution is to produce a large amount of H for fermentation process2The raw material of S carries out ferrous salt in situ Sulfur removal technology, by into fermentation system preparing pool add main component be ferrous salt chemical agent, make ferro element and anaerobism During the hydrogen sulfide that generates react to form stable compound ferrous sulfide, so as to reduce the generation of hydrogen sulfide.Carry out in situ After ferrous salt sulfur removal technology, O needed for follow-up original position air sweetening2And dry desulfurization used in the volume of digester drop significantly It is low, it can further reduce construction investment and reduce operating cost.
It is further preferred that soluble ferrite is FeCl2.Select FeCl2Be because its is cheap, solubility is high and It is pollution-free.
Preferably, air injected system is used to inject air or O into fermentation tank2.Select air the advantages of be not into This, but due to containing N in air2Deng inert gas, the efficiency of biogas combustion can be influenced.Select O2Can be to avoid introducing N2Deng Lazy rotten gas.
Preferably, digester rear end is also equipped with biogas constituent analysis, and the biogas constituent analysis is used to detect O2It is dense Degree.The purpose of the preferred solution is how many O the biogas in detection input gas equipment finally contains2, it is ensured that it is safe to use.
Preferably, biogas constituent analysis is additionally operable to detection CH4、CO2And H2The concentration of S.The purpose of the preferred solution is comprehensive Analyze the component of biogas, the convenient quality for judging biogas.
A kind of Multistage desulfuration method, includes the following steps：
[1] anticipation is under conditions of no air injected system and digester, the H after the completion of fermenting raw materials in biogas2S is dense Degree, it is ensured that the H2S concentration is less than or equal to 3000ppm；
[2] fermentation raw material is inputted in fermentation tank and fermented, using air injected system to fermentation tank while fermentation Middle injection air or oxygen carries out air sweetening in situ, and biogas is produced in fermentation process；
[3] O in the biogas of biogas analytical instrument detecting step [2] generation is utilized2Concentration, work as O2Concentration be higher than During percentage by volume 1%, biogas is transmitted back in fermentation tank using air return system；Work as O2Concentration be less than percentage by volume When 1%, biogas is conveyed into digester；
[4] dry desulfurizing process is carried out to biogas in digester.
After the technical solution, it is combined using two kinds of techniques of air sweetening in situ and dry desulfurization.Except that can strengthen The effect of desulfurization.Utilize air sweetening in-situ treatment H in situ2S so that H in biogas2S concentration substantially reduces, and then reuses dry Method desulfurization further handles H2S, because H at this time2S concentration is very low, therefore the volume of digester is relative to big when being used alone It is big to reduce, reduce construction investment and reduce operating cost.And cause to remain O in biogas for air sweetening is introduced into2It is caused Safety issue, just can consume O by follow-up dry desulfurizing process2To solve.
Preferably, when in step [1] when anticipation result be, under conditions of no air injected system and digester, raw material H after the completion of fermentation in biogas2When S concentration is more than 3000ppm, ferrous salt is added into raw material.The amount for adding ferrous salt is necessary Ensure under conditions of no air injected system and digester, the H after the completion of fermenting raw materials in biogas2S concentration is less than or equal to 3000ppm。
After the preferred solution, can according to the requirement of hydrogen sulfide in methane concentration and gas equipment to concentration of hydrogen sulfide, The combination of desulphurization system is adjusted flexibly, so as to reach the synthesis purpose for reducing construction investment and reducing operating cost.When to desulfurization When more demanding, ferrous salt desulfurization, air sweetening in situ and dry desulfurization three-level sulfur removal technology in situ can be used；Wanted when to desulfurization When asking not high, original position air sweetening and dry desulfurization two-step desulfurization technique may be selected.
In conclusion by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
1. two kinds of sulfur removal technologies are mutually promoted.Utilize air sweetening in-situ treatment H in situ2S so that H in biogas2S concentration is big It is big to reduce, then reuse dry desulfurization and further handle H2S, because H at this time2S concentration is very low, therefore the body of digester Product is greatly reduced relative to when being used alone, and is reduced construction investment and is reduced operating cost.
2. two kinds of sulfur removal technologies are mutually promoted.Cause to remain O in biogas for air sweetening is introduced into2Caused security is asked Topic, just can consume O by follow-up dry desulfurizing process2To solve.
3. desulphurization system can be adjusted flexibly according to the requirement of hydrogen sulfide in methane concentration and gas equipment to concentration of hydrogen sulfide Combination, so as to reach the desulfurization process different degrees of to biogas, reduce construction investment and reduce the synthesis purpose of operating cost.
4. air sweetening in situ may be selected to use air or O2.The advantages of selecting air is no cost, but due to sky Contain N in gas2Deng inert gas, the efficiency of biogas combustion can be influenced.Select O2Can be to avoid introducing N2Deng inert gas.
Brief description of the drawings
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein：
Fig. 1 is the structure diagram of the present invention.
Embodiment
All features disclosed in this specification, or disclosed all methods or during the step of, except mutually exclusive Feature and/or step beyond, can combine in any way.
Elaborate with reference to Fig. 1 to the present invention.
Embodiment 1
The present embodiment, which is directed in the biogas produced after fermentation, contains H2The concentration of S is less than the raw material of 3000ppm.
A kind of Multistage desulfuration system, including fermentation tank, air injected system is provided with fermentation tank, and air injected system is used In injection air or O into fermentation tank2.Air injected system is equipped with air injection pump, which includes the peace for preventing that biogas from flowing back Full valve, oxygen detection result in the biogas analytical instrument that air injection rate passes through fermentation tank exit control.Because of air Middle methane concentration can explode between percentage by volume 4%-15%, so the accuracy of oxygen concentration detection is just closed very much Key, while oxygen concentration is also the control signal of air pump, it is usually dense in the oxygen of fermentation tank exit biogas for engineering safety Degree control is within percentage by volume 1%.
Fermentation tank rear end is provided with digester, and porous filler is provided with digester, high surface area is mounted with filler Activated carbon or iron oxide.
Biogas analytical instrument is provided between fermentation tank and digester, is set between biogas analytical instrument and digester There is air return system, air return system is communicated with fermentation tank, and air return system can be by setting aspiration pump to complete natural pond The reflux work of gas.Digester rear end is also equipped with biogas constituent analysis.Biogas constituent analysis is used to detect CH4、CO2、H2S and O2Concentration.
The method that desulfurization is carried out using above-mentioned Multistage desulfuration system includes the following steps：
Step 1, carry out air sweetening in situ in fermentation tank：Fermentation raw material is inputted in fermentation tank and is fermented, is fermented While air or oxygen injected into fermentation tank using air injected system carry out air sweetening in situ, its principle be pass through to A certain amount of oxygen of input makes hydrogen sulfide be oxidized to sulphur simple substance in fermentation tank, so that reaching reduces H2The purpose of S concentration.Air Desulfurization can remove 80% or so H2S, the H in biogas after air sweetening in situ2S concentration is between 400ppm-600ppm.
Step 2, O2Concentration detection and reflux：Detected using biogas analytical instrument in the biogas exported in fermentation tank O2Concentration, work as O2Concentration when being higher than percentage by volume 1%, biogas is transmitted back in fermentation tank using air return system； Work as O2Concentration when being less than percentage by volume 1%, biogas is conveyed into digester.
Step 3, carry out dry desulfurizing process in digester to biogas：Its principle is to utilize H2S is the very strong gas of polarity The characteristics of specific surface area of body molecule and activated carbon is big, carries out desulfurization process.Activated carbon is first by H2S is adsorbed onto surface, then also There is chemical reaction to participate in, equation 2H2S+302→2SO2+2H20→2H2SO3.From reaction principle as can be seen that activated carbon takes off O can be also consumed during sulphur2.Active carbon desulfurization can make H2Between S contents are reduced to 0ppm-200pm by 400ppm-600ppm, according to The time that replacement desulfurizing agent is judged with gas requirement of gas equipment.
Embodiment 2
The present embodiment, which is directed in the biogas produced after fermentation, contains H2The concentration of S is higher than the raw material of 3000ppm, such as chicken manure hair H in biogas after ferment2S contents are up to 5000-6000ppm.
The present embodiment uses Multistage desulfuration system to be added on the basis of embodiment 1：Also set in fermentation tank front end Preparing pool is equipped with, medicine system is provided with preparing pool, the medicine system is used to add soluble ferrite, soluble ferrous FeCl can be selected in salt2。
The method that desulfurization is carried out using above-mentioned Multistage desulfuration system includes the following steps：
Step 1, ferrous salt desulfurization in situ：It is frerrous chloride chemistry by the way that into fermentation system, preparing pool adds main component Medicament, makes ferro element react to form stable compound ferrous sulfide with the hydrogen sulfide generated in anaerobic processes, so as to reduce sulphur Change the generation of hydrogen.Ferrous sulfide is not soluble in water, and fermentation tank can be discharged together with biogas slurry, will not be accumulated in fermentation tank.And vulcanize Ferrous chemical property is stablized, and will not be utilized by the microorganism, and ferro element inherently anaerobic bacteria grow necessary nutrient it One, therefore unnecessary frerrous chloride will not have a negative impact fermentation.Solution of ferrous chloride, is thrown by medicine system continous way Add, dosage carries out adjustment according to the sulfurated hydrogen detection result of biogas analytical instrument, and when operation specially manages without personnel Shield.Operating personnel only need to be according to practical operation situation, and periodically configuration supplements solution of ferrous chloride.When hydrogen sulfide in methane contains Just using desulfurization in situ when amount is more than 3000ppm, because if frerrous chloride consumption is big, operating cost will be very big.Pass through Desulfurization in situ can make hydrogen sulfide content be decreased to less than 3000ppm.
Step 2, carry out air sweetening in situ in fermentation tank：Detailed process is identical with the step 1 in embodiment 1.
Step 3, O2Concentration detection and reflux：Detailed process is identical with the step 2 in embodiment 1.
Step 4, carry out dry desulfurizing process in digester to biogas：Detailed process and step 3 phase in embodiment 1 Together.
Embodiment described above only expresses the embodiment of the application, its description is more specific and detailed, but simultaneously Therefore the limitation to the application protection domain cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art For, on the premise of technical scheme design is not departed from, various modifications and improvements can be made, these belong to this The protection domain of application.

Claims (8)

1. a kind of Multistage desulfuration system, including fermentation tank, air injected system is provided with fermentation tank, it is characterised in that：It is described Fermentation tank rear end is provided with digester, and biogas analytical instrument, biogas analytical instrument are provided between fermentation tank and digester Air return system is provided between digester, air return system is communicated with fermentation tank；Work is provided with the digester Property carbon or iron oxide；The biogas analytical instrument is used to detect O2Concentration.
A kind of 2. Multistage desulfuration system described in accordance with the claim 1, it is characterised in that：The fermentation tank front end is additionally provided with tune With pond, medicine system is provided with preparing pool, the medicine system is used to add soluble ferrite.
A kind of 3. Multistage desulfuration system described in accordance with the claim 2, it is characterised in that：The soluble ferrite is FeCl2。
A kind of 4. Multistage desulfuration system described in accordance with the claim 1, it is characterised in that：The air injected system is used for hair Air or O are injected in fermentation tank2。
A kind of 5. Multistage desulfuration system described in accordance with the claim 1, it is characterised in that：The digester rear end is also equipped with natural pond Gas constituent analysis, the biogas constituent analysis are used to detect O2Concentration.
6. according to a kind of Multistage desulfuration system described in claim 1 to 5, it is characterised in that：The biogas constituent analysis is also used In detection CH4、CO2And H2The concentration of S.
7. a kind of method of Multistage desulfuration system using described in claim 1, it is characterised in that include the following steps：
[1] anticipation is under conditions of no air injected system and digester, the H after the completion of fermenting raw materials in biogas2S concentration, it is ensured that The H2S concentration is less than or equal to 3000ppm；
[2] fermentation raw material is inputted in fermentation tank and fermented, fermentation while is noted using air injected system into fermentation tank Enter air or oxygen and carry out air sweetening in situ, biogas is produced in fermentation process；
[3] O in the biogas of biogas analytical instrument detecting step [2] generation is utilized2Concentration, work as O2Concentration be higher than volume During percentage 1%, biogas is transmitted back in fermentation tank using air return system；Work as O2Concentration be less than percentage by volume 1% When, biogas is conveyed into digester；
[4] dry desulfurizing process is carried out to biogas in digester.
8. according to a kind of Multistage desulfuration method described in claim 7, it is characterised in that：In step [1] when anticipation result be, Under conditions of air injected system and digester, the H after the completion of fermenting raw materials in biogas2When S concentration is more than 3000ppm, to Ferrous salt is added in raw material；Add ferrous salt amount must assure that under conditions of no air injected system and digester, raw material H after the completion of fermentation in biogas2S concentration is less than or equal to 3000ppm.
CN201711170952.8A 2017-11-21 2017-11-21 A kind of Multistage desulfuration system and method Pending CN107899384A (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101705127A (en) * 2009-07-28 2010-05-12 北京合百意可再生能源技术有限公司 In-situ biogas desulfurizer
CN201634652U (en) * 2009-11-13 2010-11-17 北京中环瑞德环境工程技术有限公司 High efficiency biogas biochemical combination desulfurization device
CN202658152U (en) * 2012-05-21 2013-01-09 北京时代桃源环境科技有限公司 Multifunctional anaerobic fermentation tank integrating gas generation, gas storage and desulfuration
CN202942808U (en) * 2012-12-20 2013-05-22 成都德通环境工程有限公司 Methane desulphurizing device for anaerobic reactor by blow-off method
KR20130122197A (en) * 2012-04-30 2013-11-07 한경대학교 산학협력단 Bio-gas desulfurization system
CN103408132A (en) * 2013-07-16 2013-11-27 宜宾五粮液股份有限公司 Method for removing hydrogen sulfide through introducing trace air during distillery waste water anaerobic fermentation process
JP5571323B2 (en) * 2008-05-13 2014-08-13 日本車輌製造株式会社 Method and apparatus for desulfurizing fuel gas
CN105964121A (en) * 2016-07-12 2016-09-28 南京慧淳环保科技有限公司 Anaerobic fermentation pre-desulfurization method and device
CN107129845A (en) * 2017-05-27 2017-09-05 农业部沼气科学研究所 A kind of biogas purification method of methane-generating pit

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5571323B2 (en) * 2008-05-13 2014-08-13 日本車輌製造株式会社 Method and apparatus for desulfurizing fuel gas
CN101705127A (en) * 2009-07-28 2010-05-12 北京合百意可再生能源技术有限公司 In-situ biogas desulfurizer
CN201634652U (en) * 2009-11-13 2010-11-17 北京中环瑞德环境工程技术有限公司 High efficiency biogas biochemical combination desulfurization device
KR20130122197A (en) * 2012-04-30 2013-11-07 한경대학교 산학협력단 Bio-gas desulfurization system
CN202658152U (en) * 2012-05-21 2013-01-09 北京时代桃源环境科技有限公司 Multifunctional anaerobic fermentation tank integrating gas generation, gas storage and desulfuration
CN202942808U (en) * 2012-12-20 2013-05-22 成都德通环境工程有限公司 Methane desulphurizing device for anaerobic reactor by blow-off method
CN103408132A (en) * 2013-07-16 2013-11-27 宜宾五粮液股份有限公司 Method for removing hydrogen sulfide through introducing trace air during distillery waste water anaerobic fermentation process
CN105964121A (en) * 2016-07-12 2016-09-28 南京慧淳环保科技有限公司 Anaerobic fermentation pre-desulfurization method and device
CN107129845A (en) * 2017-05-27 2017-09-05 农业部沼气科学研究所 A kind of biogas purification method of methane-generating pit

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Application publication date: 20180413