CN102755984B - Innoxious combination treatment method and the system of a kind of hydrogen sulfide and flying dust - Google Patents
Innoxious combination treatment method and the system of a kind of hydrogen sulfide and flying dust Download PDFInfo
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- CN102755984B CN102755984B CN201210236461.XA CN201210236461A CN102755984B CN 102755984 B CN102755984 B CN 102755984B CN 201210236461 A CN201210236461 A CN 201210236461A CN 102755984 B CN102755984 B CN 102755984B
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Abstract
The innoxious combination treatment method and the system that the embodiment of the invention discloses a kind of hydrogen sulfide and flying dust, the method comprises: collect the flying dust producing in Refuse Incineration Process, and packed into hydrogen sulfide removal device; In flying dust, contain heavy metallic oxide particle; Collect the hydrogen sulfide gas that garbage loading embeading operation area and/or percolate treating apparatus produce, and the hydrogen sulfide gas of collecting is imported in hydrogen sulfide removal device; Hydrogen sulfide gas reacts in hydrogen sulfide removal device with the heavy metallic oxide in flying dust, generates water and insoluble metal sulfide. The innoxious combination treatment method of the hydrogen sulfide that the embodiment of the present invention provides and flying dust and system are for current refuse landfill H2The Drainage feature that S pollutes, and the physics and chemistry feature of flying ash and toxicology characteristic, can solve day by day serious refuse landfill odor pollution problem, improves H2The removal efficiency of S is improved landfill yard air quality, carries out the processing of making fly-ash from incineration harmless simultaneously.
Description
Technical field
The present invention relates to garbage disposal field, relate in particular to the innoxious Combined Treatment of a kind of hydrogen sulfide and flying dustMethod and system.
Background technology
Refuse landfill is one of topmost source of odor pollution, has received at present increasing concern.Along with socioeconomic development, the generation of China's rubbish raises year by year, the odor pollution in refuse landfillProblem be mentioned more and more, due to stench cause problem also make the addressing of landfill yard more difficult. " emission standard for odor pollutants " that China promulgates specified 8 kinds of needs controls in (GB14554-93)In odorant, there are 5 kinds to be sulphur-containing substance. As can be seen here, in the middle of odor pollution, sulfur-containing compound has been subject toMany concerns. Hydrogen sulfide (H2S) be foul gas important in landfill gas, in reducible sulfur compound, account for masterLead status, can indicate concentration and the flow of other reducible sulfur compound (RSC).
Large quantity research shows, H2S is the main affecting factors of odor pollution, and its contribution for stench can reachTo 10.92%, therefore, by restriction H2The discharge of S, can alleviate the stench of landfill yard to a great extentPollute.
With in industrial production, produce H2The situation difference of S, in landfill yard or other disposition of solid waste placesThe hydrogen sulfide discharging is all in the concentration of denier. But because the threshold value of hydrogen sulfide is lower, be only 0.05ppb, instituteEven with the H of low concentration2S still can produce ill effect to people's sense organ. In addition, be exposed to for a long time sulphurChange the reaction that can cause a series of discomforts under hydrogen, as nauseating, dizziness, insomnia, poor appetite etc., veryTo causing keratitis and some respiratory disorders. The much research for landfill yard periphery residents ' health situation is foundH2The rising of S concentration has directly caused resident's negative emotions, and has caused mucosa irritation, upper respiratory tract senseThe symptom such as dye. At present, the H of refuse landfill2S adopts the mode processing of spraying agent conventionally, not only removesH2Weak effect, the cost of S are high, and secondary pollution is serious.
On the other hand, waste incineration due to its process solid waste efficiently, feature efficiently, developed recentlyRapidly. Incineration of refuse flyash refers to the residue of collecting in the flue gas purification system of garbage burning factory and obtain,Generally comprise deduster flying dust and absorption tower flying dust or scrubbing tower sewage sludge. In flying dust, contain flue dust, addThe chemical agent entering and chemical reaction product. Flying ash is as a kind of high-specific surface area material, enrichedThe toxic heavy metal such as mercury, lead and cadmium, be a kind of hazardous waste with Heavy Metal Pollution characteristic, to human bodyHealthy and ecological environment has great harm. Domestic waste incineration amount exceedes 13150t/d at present, according toFlying ash amount is that the amount of burning away the refuse 3% is calculated, and annual waste incineration will produce 14.4 ten thousand tons of flying dusts. Flying dustTreatment and disposal also become current large technological difficulties.
Heavy metal is pollutant component important in incineration of refuse flyash, and in flying dust, variety classes content of beary metal is poorDifferent very large, the content of Cu, Pb and Zn is more conventionally. There are some researches show, in burning process in refuse 33%Pb and 92% Cd transfer in flying dust. Due to the non-biodegradable that heavy metal contaminants has, flyAsh is by long-term existence and to the great potential threat of environment structure. The flying dust being discharged in environment turns through migrationChange, finally by food chain harmful to human and other biological body. The heavy metal that human body is taken in can cause health groupKnit organ lesion, carcinogenic. Therefore, the heavy metal pollution in incineration of refuse flyash has caused generation with the problem of preventing and treatingThe common concern of various countries of boundary.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, for current refuse landfill H2S pollutesDrainage feature, and the physics and chemistry feature of flying ash and toxicology characteristic, provide a kind of hydrogen sulfide and flying dustInnoxious combination treatment method and system, to solve day by day serious refuse landfill odor pollution problem, carryHigh H2The removal efficiency of S changes landfill yard air quality, carries out the processing of making fly-ash from incineration harmless simultaneously.
In order to solve the problems of the technologies described above, the embodiment of the present invention provides the innoxious of a kind of hydrogen sulfide and flying dustCombination treatment method, comprising:
Collect the flying dust producing in Refuse Incineration Process, and packed into hydrogen sulfide removal device; Described flying dustIn contain heavy metallic oxide particle;
Collect the hydrogen sulfide gas that garbage loading embeading operation area and/or percolate treating apparatus produce, and will collectHydrogen sulfide gas imports in described hydrogen sulfide removal device;
Described hydrogen sulfide gas reacts in described hydrogen sulfide removal device with the heavy metallic oxide in flying dust,Generate water and insoluble metal sulfide.
Wherein, the flying dust producing in described collection Refuse Incineration Process, and packed into hydrogen sulfide removal device,Comprise:
Collect the flying dust in furnace outlet, horizontal flue and sack cleaner in domestic waste incineration;
To after the flying dust compacting of collection, be packed into hydrogen sulfide removal device.
Wherein, the hydrogen sulfide gas that described collection garbage loading embeading operation area and/or percolate treating apparatus produce,And the hydrogen sulfide gas of collection is imported in described hydrogen sulfide removal device, comprising:
In landfill operation district, utilize hydrogen sulfide gathering-device to collect the stink damp producing in landfill operation districtBody, and by blower unit, the collected hydrogen sulfide gas of described hydrogen sulfide gathering-device is imported to described sulfurationIn hydrogen removal device; Or
Rubbish Surface mulch one deck in landfill operation district is through the landfill cover soil of modification, and on soil layer clothPut micropore wireway, the hydrogen sulfide gas producing in described landfill operation district is drained into sulphur by described micropore wirewayChange hydrogen removal device.
Wherein, the hydrogen sulfide gas that described collection garbage loading embeading operation area and/or percolate treating apparatus produce,And the hydrogen sulfide gas of collection is imported in described hydrogen sulfide removal device, comprising:
The processing unit place that seals at percolate treating apparatus arranges hydrogen sulfide removal device, passes through air inducingDevice produces described percolate treating apparatus rear concentrated introducing of hydrogen sulfide gas collection because processing percolateIn described hydrogen sulfide removal device.
Wherein, the heavy metallic oxide in described hydrogen sulfide gas and flying dust is in described hydrogen sulfide removal deviceReaction, generates in water and insoluble metal sulfide, and concrete reaction equation is:
H2S+MOx→MSx+xH2O
Wherein, MOx is heavy metallic oxide; MSx is insolubility metal sulfide.
Wherein, the heavy metallic oxide in described hydrogen sulfide gas and flying dust is in described hydrogen sulfide removal deviceReaction, after generating water and insoluble metal sulfide, also comprises:
Flying dust in described hydrogen sulfide removal device is carried out to Leaching test, Leaching is after tested reachedTarget flying dust carries out safe disposal.
Accordingly, the embodiment of the present invention also provides the innoxious joint processing system of a kind of hydrogen sulfide and flying dust,Comprise:
Flying dust gathering-device, the flying dust producing for collecting Refuse Incineration Process, and packed into hydrogen sulfideRemoval device; In described flying dust, contain heavy metallic oxide particle;
Hydrogen sulfide gathering-device, the sulphur producing for collecting garbage loading embeading operation area and/or percolate treating apparatusChange hydrogen, and the hydrogen sulfide gas of collection is imported in described hydrogen sulfide removal device;
Hydrogen sulfide removal device, for making the heavy metallic oxide of described hydrogen sulfide gas and flying dust describedIn hydrogen sulfide removal device, react, generate water and insoluble metal sulfide.
Wherein, described flying dust gathering-device comprises:
Flying dust collection module, for collecting domestic waste incineration furnace outlet, horizontal flue and cloth bagFlying dust in deduster;
Flying dust filling device, for being packed into sulfuration after flying dust compacting collected described flying dust collection moduleHydrogen removal device.
Wherein, described hydrogen sulfide gathering-device comprises:
The first gathering-device, for collect the hydrogen sulfide gas producing in landfill operation district in landfill operation district,And by the first blower unit, the hydrogen sulfide gas of collection is imported in described hydrogen sulfide removal device;
The first blower unit, for importing described sulphur by the collected hydrogen sulfide gas of described the first gathering-deviceChange in hydrogen removal device; Or
Described hydrogen sulfide gathering-device comprises:
Hydrogen sulfide gas operated device, described hydrogen sulfide gas operated device is made up of the micropore wireway of some conductings; InstituteState micropore wireway be arranged in rubbish Surface mulch in landfill operation district through on the landfill cover soil of modification,The hydrogen sulfide gas producing in described landfill operation district is drained into hydrogen sulfide removal device by described micropore wireway.
Wherein, described hydrogen sulfide gathering-device comprises:
The second blower unit, described the second blower unit connects sealing of percolate treating apparatus and processes singleFirst and described hydrogen sulfide removal device, for producing described percolate treating apparatus because processing percolateHydrogen sulfide gas is concentrated and is introduced in described hydrogen sulfide removal device after collecting.
Wherein, the heavy metallic oxide in described hydrogen sulfide gas and flying dust is in described hydrogen sulfide removal deviceReaction equation be:
H2S+MOx→MSx+xH2O
Wherein, MOx is heavy metallic oxide; MSx is insolubility metal sulfide.
Wherein, the innoxious joint processing system of described hydrogen sulfide and flying dust also comprises:
Gas phase chromatographic device, for the heavy metallic oxide at described hydrogen sulfide and flying dust at described hydrogen sulfideIn removal device, react, after generating water and insoluble metal sulfide, to the hydrogen sulfide in Exhaust GasContent detects;
Flying dust toxicity leaching test device, soaks for the flying dust in described hydrogen sulfide removal device is carried out to toxicityGo out test, to carrying out safe disposal through toxicity leaching test flying dust up to standard.
The hydrogen sulfide that the enforcement embodiment of the present invention provides and innoxious combination treatment method and the system of flying dust,At least there is following beneficial effect: 1, significantly reduce garbage loading embeading operation area H2S discharge, improves landfill reservoir areaAir regime; 2, effectively reduce the H of percolate treatment plant2S burst size, protection workman and periphery resident are strongHealth; 3, complete incineration of refuse flyash harmless treatment and comprehensive utilization; 4, realized landfill yard H2S pollutesControl and flying ash comprehensive utilization.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below will be to implementingIn example or description of the Prior Art, the accompanying drawing of required use is briefly described, and apparently, the following describesIn accompanying drawing be only some embodiments of the present invention, for those of ordinary skill in the art, do not payingGo out under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the innoxious combination treatment method first embodiment flow process of hydrogen sulfide provided by the invention and flying dustSchematic diagram;
Fig. 2 is the innoxious combination treatment method second embodiment flow process of hydrogen sulfide provided by the invention and flying dustSchematic diagram;
Figure 3 shows that the part leaching ability of heavy metal substrate concentration of reaction front and back flying dust;
Fig. 4 is innoxious combination treatment method the 3rd embodiment flow process of hydrogen sulfide provided by the invention and flying dustSchematic diagram;
Fig. 5 is innoxious joint processing system first example structure of hydrogen sulfide provided by the invention and flying dustSchematic diagram;
Fig. 6 is innoxious joint processing system second example structure of hydrogen sulfide provided by the invention and flying dustSchematic diagram;
Fig. 7 is the innoxious joint processing system simulation drawing of hydrogen sulfide provided by the invention and flying dust.
Detailed description of the invention
The innoxious combination treatment method of the hydrogen sulfide that the embodiment of the present invention provides and flying dust and system are for orderFront refuse landfill H2The Drainage feature that S pollutes, and the physics and chemistry feature of flying ash and toxicology characteristic,Can solve day by day serious refuse landfill odor pollution problem, improve H2The removal efficiency of S changes landfillField air quality is carried out the processing of making fly-ash from incineration harmless simultaneously.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearlyChu, intactly description, obviously, described embodiment is only the present invention's part embodiment, instead ofWhole embodiment. Based on the embodiment in the present invention, those of ordinary skill in the art are not making creationThe every other embodiment obtaining under property work prerequisite, belongs to the scope of protection of the invention.
Referring to Fig. 1, be innoxious combination treatment method first embodiment of hydrogen sulfide provided by the invention and flying dustSchematic flow sheet. As shown in Figure 1, the method comprises:
Step S100, collects the flying dust producing in Refuse Incineration Process, and is packed into hydrogen sulfide removal device;In described flying dust, contain heavy metallic oxide particle.
Step S101, collects the hydrogen sulfide gas that garbage loading embeading operation area and/or percolate treating apparatus produce,And the hydrogen sulfide gas of collection is imported in described hydrogen sulfide removal device.
Step S102, the heavy metallic oxide in described hydrogen sulfide gas and flying dust fills at described hydrogen sulfide removalPut middle reaction, generate water and insoluble metal sulfide.
The innoxious combination treatment method of the hydrogen sulfide that the embodiment of the present invention provides and flying dust is for current rubbishLandfill yard H2The Drainage feature that S pollutes, and the physics and chemistry feature of flying ash and toxicology characteristic, utilization fliesHeavy metal in ash mainly exists with the form of oxidation state, by the foul gas H of itself and reproducibility2S carries out oxygenChange reduction reaction, effectively the heavy metallic oxide in flying ash is cured, will belong to dangerous discardedThe flying dust of thing becomes common discarded object, reduces flying dust processing cost. Also flying dust is carried out to recycling simultaneously,Effectively remove H2S. The innoxious combination treatment method of the hydrogen sulfide that the present embodiment provides and flying dust can be separatedCertainly day by day serious refuse landfill odor pollution problem, improves H2The removal efficiency of S changes landfill yard airQuality is carried out the processing of making fly-ash from incineration harmless simultaneously.
Referring to Fig. 2, be innoxious combination treatment method second embodiment of hydrogen sulfide provided by the invention and flying dustSchematic flow sheet. As shown in Figure 2, the method comprises:
Step S200, collects in furnace outlet in domestic waste incineration, horizontal flue and sack cleanerFlying dust.
More specifically, waste incineration due to its process solid waste efficiently, feature efficiently, in recent years send outExhibition rapidly. Incineration of refuse flyash refers to the residue of collecting in the flue gas purification system of incinerator and obtain,Flying dust in incinerator in furnace outlet, horizontal flue and sack cleaner. Enriched in flying dustThe toxic heavy metal such as mercury, lead and cadmium, be a kind of hazardous waste simultaneously with various heavy hazard profile,Health and ecological environment are had to great harmfulness.
Step S201, will be packed into hydrogen sulfide removal device after the flying dust compacting of collection.
Step S202, in landfill operation district, utilizes hydrogen sulfide gathering-device to collect in landfill operation district and producesHydrogen sulfide gas, and by blower unit, the collected hydrogen sulfide gas of described hydrogen sulfide gathering-device is ledEnter in described hydrogen sulfide removal device; Or rubbish Surface mulch one deck in landfill operation district is through modificationLandfill cover soil, and on soil layer, arrange micropore wireway, described micropore wireway is by described landfill operation districtThe hydrogen sulfide gas producing drains into hydrogen sulfide gas removal device.
Further, this step can be by cram packer, rubbish to be poured in landfill operation district, utilizesBlower unit is sent the hydrogen sulfide gas of landfill operation unit into hydrogen sulfide removal device, or further compacting is inclinedThe rubbish falling, and cover the earthing of one deck modification in waste layer surface, on soil layer, be evenly arranged micropore wireway,The H that garbage degradation produces2S gas enters hydrogen sulfide removal device after conduit, through purified gasEnter marsh gas power generation factory.
More specifically, garbage loading embeading operation area is H2The main region of S discharge. H2S is the row in this regionBe placed with that generation is large, uncontrollable discharge, continuation are long and affect the features such as extensive. Traditional method is suitable for moreIn industrial production, remove H2S, and for the H without group discharge producing in landfill operation district2S has high one-tenthThe shortcoming of this poor efficiency. The embodiment of the present invention arranges hydrogen sulfide gas removal device in landfill operation district, and by drawingWind apparatus is introduced hydrogen sulfide in removal device, can effectively reduce energy consumption, and obtains preferably H2S removesEffect. Meanwhile, rubbish covers last layer modification earthing after compacting, can effectively suppress H2S distributes.The gas that buring layer produces drains into H through wireway2After S removal device, can directly enter marsh gas power generation factory and send outElectricity production capacity, has alleviated H greatly2S, for the corrosion of electric power factory equipment, contributes to the extension device life-span.
Step S203, the heavy metallic oxide in described hydrogen sulfide gas and flying dust fills at described hydrogen sulfide removalPut middle reaction, generate water and insoluble metal sulfide. Heavy metal in described hydrogen sulfide gas and flying dustOxide reacts in described hydrogen sulfide removal device, generates in water and insoluble metal sulfide, concreteReaction equation be:
H2S+MOx→MSx+xH2O
Wherein, MOx is heavy metallic oxide; MSx is insolubility metal sulfide.
More specifically, to this class hazardous waste of incineration of refuse flyash process mainly comprise high-temperature process (melting andSintering), cement solidification processing and wet chemical treatment three types of technology. But said method exists energy consumption large, needWant the shortcomings such as chemical agent consumption. The embodiment of the present invention is utilized the physicochemical property of flying dust, wherein contains a large amount ofMetal oxide, can with the feature of hydrogen sulfide generation redox reaction, incineration of refuse flyash is providedSourceization is utilized. By with H2The reaction of S, is significantly reduced the Leaching Heavy Metals of flying ash.After Leaching test, again flying dust is carried out to safe disposal, reduce the harm to environment.
Step S204, carries out Leaching test to the flying dust in described hydrogen sulfide removal device, to after testedLeaching flying dust up to standard carries out safe disposal. More specifically, the method profit that the embodiment of the present invention providesBy characteristic and the hydrogen sulfide emission feature of incineration of refuse flyash, carry out H2S controls and innoxious the combining of flying dustClose improvement, contained H2The discharge of S also effectively reduces the toxicity of flying dust. Through verification experimental verification, through the present inventionThe H of method processing2S clearance can reach more than 90%, and concentration of emission can reach " emission standard for odor pollutants "(GB14554-93) primary standard limit value. Flying ash obviously reduces through reaction Leaching later.Be illustrated in figure 3 the part leaching ability of heavy metal substrate concentration of flying dust before and after reaction, can see Cr, Cu, Cd,The leaching concentration of four heavy metal species such as Pb has had significant decline, and this explanation flying dust is through soaking after reactionGo out toxicity and obviously reduce, far below " hazardous waste judging standard-leaching characteristic identification " (GB5085.3-2007)In the concentration limit of each heavy metal ion. Taking metal Cd as example, before reaction, the leaching concentration of Cd approaches10000ppb, and leaching concentration limit value in national standard is 1000ppb, the flying ash before reaction meetsThe standard of hazardous waste; And the leaching concentration of flying ash Cd is reduced to 86ppb after reaction, far belowConcentration limit in standard, Leaching reduces greatly. The heavy metal contaminants of other kinds has also obtainedGood treatment effect. As can be seen here, the inventive method has good environment and social benefit.
Referring to Fig. 4, be innoxious combination treatment method the 3rd embodiment of hydrogen sulfide provided by the invention and flying dustSchematic flow sheet. The present embodiment and upper one difference of implementing are H2The generation source of S and corresponding H2SCollection mode difference, other step and a upper embodiment are basic identical, therefore be not described in detail in the present embodiment.
As shown in Figure 4, the method comprises:
Step S300, collects in furnace outlet in domestic waste incineration, horizontal flue and sack cleanerFlying dust.
Step S301, will be packed into hydrogen sulfide removal device after the flying dust compacting of collection.
Step S302, arranges hydrogen sulfide removal device at the processing unit place that seals of percolate treating apparatus,After the hydrogen sulfide gas described percolate treating apparatus being produced because of processing percolate by blower unit is collectedConcentrate and introduce in described hydrogen sulfide removal device.
More specifically, percolate treatment plant is that in landfill yard, H2S pollutes comparatively serious region. In diafiltrationLiquid processing device is not equipped with the percolate treatment plant of gas collection treatment process, the H2S gas being produced by percolateThe physical and mental health of body to staff and periphery resident's living environment have all caused serious harm. The present invention coupleIn percolate treatment plant, each of percolate treating apparatus seals processing unit equipment H2S gas and removes dressPut, the H2S producing in percolate processing procedure is focused on to discharge, can greatly improve percolate treatment plantWorkman's working environment, solves H2S pollution problem.
Step S303, the heavy metallic oxide in described hydrogen sulfide gas and flying dust fills at described hydrogen sulfide removalPut middle reaction, generate water and insoluble metal sulfide.
Step S304, carries out Leaching test to the flying dust in described hydrogen sulfide removal device, to after testedLeaching flying dust up to standard carries out safe disposal.
Certainly the method that, the present embodiment and a upper embodiment provide can be carried out simultaneously.
The innoxious combination treatment method of the hydrogen sulfide that the embodiment of the present invention provides and flying dust is for current rubbishLandfill yard H2The Drainage feature that S pollutes, and the physics and chemistry feature of flying ash and toxicology characteristic, can separateCertainly day by day serious refuse landfill odor pollution problem, improves H2The removal efficiency of S changes landfill yard airQuality is carried out the processing of making fly-ash from incineration harmless simultaneously.
Referring to Fig. 5, be innoxious joint processing system first embodiment of hydrogen sulfide provided by the invention and flying dustStructural representation, as shown in Figure 5, this system comprises: flying dust gathering-device 1, hydrogen sulfide gathering-device 2,Hydrogen sulfide removal device 3.
Flying dust gathering-device 1, the flying dust producing for collecting Refuse Incineration Process, and packed into hydrogen sulfideRemoval device 3; In described flying dust, contain heavy metallic oxide particle.
Hydrogen sulfide gathering-device 2, for collecting, garbage loading embeading operation area and/or percolate treating apparatus produceHydrogen sulfide gas, and the hydrogen sulfide gas of collection is imported in described hydrogen sulfide removal device 3.
Hydrogen sulfide removal device 3, for making the heavy metallic oxide of described hydrogen sulfide gas and flying dust describedReaction in hydrogen sulfide removal device 3, generates water and insoluble metal sulfide.
The innoxious joint processing system of the hydrogen sulfide that the embodiment of the present invention provides and flying dust, for current rubbishRubbish landfill yard H2The Drainage feature that S pollutes, and the physics and chemistry feature of flying ash and toxicology characteristic, utilizeHeavy metal in flying dust mainly exists with the form of oxidation state, by the foul gas H of itself and reproducibility2S carries outRedox reaction, is cured the heavy metallic oxide in flying ash effectively, will belong to dangerous uselessThe flying dust of gurry becomes common discarded object, reduces flying dust processing cost. Also flying dust is carried out to resource profit simultaneouslyWith, effectively remove H2S. The innoxious joint processing system of the hydrogen sulfide that the present embodiment provides and flying dust canTo solve day by day serious refuse landfill odor pollution problem, improve H2The removal efficiency of S is improved landfill yardAir quality is carried out the processing of making fly-ash from incineration harmless simultaneously.
Referring to Fig. 6, be innoxious joint processing system second embodiment of hydrogen sulfide provided by the invention and flying dustStructural representation, in the present embodiment, by the structure and composition of more detailed this system of description. As Fig. 6Shown in, this system comprises: flying dust gathering-device 1, hydrogen sulfide gathering-device 2, hydrogen sulfide removal device 3.
Flying dust gathering-device 1, the flying dust producing for collecting Refuse Incineration Process, and packed into hydrogen sulfideRemoval device 3; In described flying dust, contain heavy metallic oxide particle. More specifically, described flying dust is collected dressPutting 1 comprises:
Flying dust collection module 11, for collecting domestic waste incineration furnace outlet, horizontal flue and clothFlying dust in bag dust collector. More specifically, waste incineration is because it processes solid waste efficiently, fastFeature, developed recently is rapid. Incineration of refuse flyash refers in the flue gas purification system of incinerator and receivesCollection and residue, the first gathering-device 21 for incinerator furnace outlet, horizontal flue withAnd flying dust in sack cleaner. The toxic heavy metal such as the mercury of enriched, lead and cadmium in flying dust, be a kind of withTime there is the hazardous waste of various heavy hazard profile, health and ecological environment are had to great dangerEvil property.
Flying dust filling device 12, for being packed into after flying dust compacting collected described flying dust collection module 11Hydrogen sulfide removal device 3.
Hydrogen sulfide gathering-device 2, for collecting, garbage loading embeading operation area and/or percolate treating apparatus produceHydrogen sulfide gas, and the hydrogen sulfide gas of collection is imported in described hydrogen sulfide removal device 3. More concrete, described hydrogen sulfide gathering-device 2 comprises:
The first gathering-device 21, for collecting the stink damp producing in landfill operation district in landfill operation districtBody, and by the first blower unit 22, the hydrogen sulfide gas of collection is imported in described hydrogen sulfide removal device.
The first blower unit 22, described in importing hydrogen sulfide gas collected described the first gathering-deviceIn hydrogen sulfide removal device.
Further, this step can be by cram packer, rubbish to be poured in landfill operation district, utilizesBlower unit is sent the hydrogen sulfide gas of landfill operation unit into hydrogen sulfide removal device, or further compacting is inclinedThe rubbish falling, and cover the earthing of one deck modification in waste layer surface, on soil layer, be evenly arranged micropore wireway,The H that garbage degradation produces2S gas enters hydrogen sulfide removal device after conduit, through purified gasEnter marsh gas power generation factory.
More specifically, garbage loading embeading operation area is H2The main region of S discharge. H2S is the row in this regionBe placed with that generation is large, uncontrollable discharge, continuation are long and affect the features such as extensive. Traditional method is suitable for moreIn industrial production, remove H2S, and for the H without group discharge producing in landfill operation district2S has high one-tenthThe shortcoming of this poor efficiency. The embodiment of the present invention arranges the first gathering-device 21 and collects garbage loading embeading in landfill operation districtThe H that overflow operation area2S, and by the first blower unit 22, hydrogen sulfide is introduced in hydrogen sulfide removal device 3,Can effectively reduce energy consumption, and obtain preferably H2S removal effect.
Further, the present invention also provides the another embodiment of described hydrogen sulfide gathering-device 2, in this enforcementIn example, described hydrogen sulfide gathering-device 2 comprises:
Hydrogen sulfide gas operated device 23, described hydrogen sulfide gas operated device is made up of the micropore wireway of some conductings;Described micropore wireway is arranged in the landfill cover soil through modification of the rubbish Surface mulch in landfill operation districtUpper, the hydrogen sulfide gas producing in described landfill operation district is drained into hydrogen sulfide removal dress by described micropore wirewayPut 3.
Preferably, this hydrogen sulfide gas operated device 23 can be joined with the first gathering-device 21, the first blower unit 22Close use. Rubbish covers last layer modification earthing after compacting, can effectively suppress H2S distributes. LandfillThe gas that layer produces drains into H through wireway2After S removal device, can directly enter the generating of marsh gas power generation factory and produceCan, greatly alleviate H2S, for the corrosion of electric power factory equipment, contributes to the extension device life-span.
Further, the present invention also provides another embodiment of described hydrogen sulfide gathering-device 2, in this enforcementIn example, described hydrogen sulfide gathering-device 2 comprises:
The second blower unit 24, described the second blower unit 24 connects the place that seals of percolate treating apparatusReason unit and described hydrogen sulfide removal device 3, for producing described percolate treating apparatus because processing percolateRaw hydrogen sulfide gas is concentrated and is introduced in described hydrogen sulfide removal device 3 after collecting.
Preferably, this second blower unit 24 can with aforesaid hydrogen sulfide gas operated device 23, the first gathering-device21, the first blower unit 22 is used in conjunction with.
Hydrogen sulfide removal device 3, for making the heavy metallic oxide of described hydrogen sulfide gas and flying dust describedReaction in hydrogen sulfide removal device 3, generates water and insoluble metal sulfide. Wherein, described hydrogen sulfideThe reaction equation of heavy metallic oxide in gas and flying dust in described hydrogen sulfide removal device is:
H2S+MOx→MSx+xH2O
Wherein, MOx is heavy metallic oxide; MSx is insolubility metal sulfide. More specifically,This class hazardous waste of incineration of refuse flyash is processed and mainly comprised high-temperature process (melting and sintering), cement solidification placeReason and wet chemical treatment three types of technology. But said method exists energy consumption large, needs chemical agent consumption etc.Shortcoming. The embodiment of the present invention is utilized the physicochemical property of flying dust, wherein contains a large amount of metal oxides, can be withThe feature of hydrogen sulfide generation redox reaction, has carried out recycling to incineration of refuse flyash. By withH2The reaction of S, is significantly reduced the Leaching Heavy Metals of flying ash. After Leaching testAgain flying dust is carried out to safe disposal, reduce the harm to environment.
Further, the innoxious joint processing system of described hydrogen sulfide and flying dust also comprises:
Gas phase chromatographic device 4, for the heavy metallic oxide at described hydrogen sulfide and flying dust at described hydrogen sulfideReaction in removal device 3, after generating water and insoluble metal sulfide, to the sulfuration in Exhaust GasHydrogen content detects;
Flying dust toxicity leaching test device 5, soaks for the flying dust in described hydrogen sulfide removal device is carried out to toxicityGo out test, to carrying out safe disposal through toxicity leaching test flying dust up to standard.
More specifically, the system that the embodiment of the present invention provides, utilizes characteristic and the sulfuration of incineration of refuse flyashHydrogen Drainage feature, has carried out H2S controls the comprehensive regulation innoxious with flying dust, has contained H2The discharge of S alsoEffectively reduce the toxicity of flying dust. Through verification experimental verification, through the H of the inventive method processing2S clearance can reach 90%Above, concentration of emission can reach " emission standard for odor pollutants " primary standard limit value (GB14554-93).Flying ash obviously reduces through reaction Leaching later. Be illustrated in figure 3 the part of reaction front and back flying dustLeaching ability of heavy metal substrate concentration, can see that the leaching concentration of four heavy metal species such as Cr, Cu, Cd, Pb has hadSignificant decline, this explanation flying dust obviously reduces through the Leaching after reaction, far below " dangerous uselessThing judging standard-leaching characteristic identification " concentration limit of each heavy metal ion in (GB5085.3-2007).Taking metal Cd as example, before reaction, the leaching concentration of Cd approaches 10000ppb, and leaching in national standardConcentration limit is 1000ppb, and the flying ash before reaction meets the standard of hazardous waste; And after reactionThe leaching concentration of flying ash Cd is reduced to 86ppb, and far below the concentration limit in standard, Leaching is largeLarge reduction. The heavy metal contaminants of other kinds has also obtained good treatment effect. As can be seen here, thisThe bright system providing has good environment and social benefit.
Referring to Fig. 7, be the innoxious joint processing system simulation drawing of hydrogen sulfide provided by the invention and flying dust, shouldThe innoxious joint processing system of hydrogen sulfide and flying dust, for current refuse landfill H2The discharge spy that S pollutesPoint, and the physics and chemistry feature of flying ash and toxicology characteristic, utilize heavy metal in flying dust mainly with oxidationThe form of state exists, by the foul gas H of itself and reproducibility2S carries out redox reaction, effectively will burnThe heavy metallic oxide burning in flying dust is cured, and the flying dust that belongs to danger wastes is become to common discarded object,Reduce flying dust processing cost. Also flying dust is carried out to recycling, effectively removed H simultaneously2S. This enforcementThe innoxious joint processing system of the hydrogen sulfide that example provides and flying dust can solve day by day serious refuse landfillOdor pollution problem, improves H2The removal efficiency of S changes landfill yard air quality, carries out flying ash simultaneouslyInnoxious processing.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method,Be can carry out the hardware that instruction is relevant by computer program to complete, described program can be stored in a calculatingIn machine read/write memory medium, this program, in the time carrying out, can comprise as the flow process of the embodiment of above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-OnlyMemory,Or random store-memory body (RandomAccessMemory, RAM) etc. ROM).
Above disclosed only for a kind of preferred embodiment of the present invention, certainly can not limit this with thisBright interest field, the equivalent variations of therefore doing according to the claims in the present invention, still belongs to that the present invention containsScope.
Claims (8)
1. an innoxious combination treatment method for hydrogen sulfide and flying dust, is characterized in that, comprising:
Collect the flying dust producing in Refuse Incineration Process, and packed into hydrogen sulfide removal device; Described flying dustIn contain heavy metallic oxide particle;
Collect the hydrogen sulfide gas that garbage loading embeading operation area and percolate treating apparatus produce, and by the sulphur of collectingChanging hydrogen imports in described hydrogen sulfide removal device;
Described hydrogen sulfide gas reacts in described hydrogen sulfide removal device with the heavy metallic oxide in flying dust,Generate water and insoluble metal sulfide;
Wherein, the hydrogen sulfide gas that described collection garbage loading embeading operation area and percolate treating apparatus produce, andThe hydrogen sulfide gas of collection is imported in described hydrogen sulfide removal device, comprising:
In landfill operation district, utilize hydrogen sulfide gathering-device to collect the stink damp producing in landfill operation districtBody, and by blower unit, the collected hydrogen sulfide gas of described hydrogen sulfide gathering-device is imported to described sulfurationIn hydrogen removal device; Or
Rubbish Surface mulch one deck in landfill operation district is through the landfill cover soil of modification, and on soil layer clothPut micropore wireway, the hydrogen sulfide gas producing in described landfill operation district is drained into sulphur by described micropore wirewayChange hydrogen removal device;
Wherein, the hydrogen sulfide gas that described collection garbage loading embeading operation area and percolate treating apparatus produce, andThe hydrogen sulfide gas of collection is imported in described hydrogen sulfide removal device, also comprises:
The processing unit place that seals at percolate treating apparatus arranges hydrogen sulfide removal device, passes through air inducingDevice produces described percolate treating apparatus rear concentrated introducing of hydrogen sulfide gas collection because processing percolateIn described hydrogen sulfide removal device.
2. the innoxious combination treatment method of hydrogen sulfide as claimed in claim 1 and flying dust, is characterized in that,The flying dust producing in described collection Refuse Incineration Process, and packed into hydrogen sulfide removal device, comprising:
Collect the flying dust in furnace outlet, horizontal flue and sack cleaner in domestic waste incineration;
To after the flying dust compacting of collection, be packed into hydrogen sulfide removal device.
3. the innoxious combination treatment method of hydrogen sulfide as claimed in claim 1 or 2 and flying dust, its featureBe, described hydrogen sulfide gas reacts in described hydrogen sulfide removal device with the heavy metallic oxide in flying dust,Generate in water and insoluble metal sulfide, concrete reaction equation is:
xH2S+MOx→MSx+xH2O
Wherein, MOx is heavy metallic oxide; MSx is insolubility metal sulfide.
4. the innoxious combination treatment method of hydrogen sulfide as claimed in claim 3 and flying dust, is characterized in that,Described hydrogen sulfide gas reacts in described hydrogen sulfide removal device with the heavy metallic oxide in flying dust, generatesAfter water and insoluble metal sulfide, also comprise:
Flying dust in described hydrogen sulfide removal device is carried out to Leaching test, Leaching is after tested reachedTarget flying dust carries out safe disposal.
5. an innoxious joint processing system for hydrogen sulfide and flying dust, is characterized in that, comprising:
Flying dust gathering-device, the flying dust producing for collecting Refuse Incineration Process, and packed into hydrogen sulfideRemoval device; In described flying dust, contain heavy metallic oxide particle;
Hydrogen sulfide gathering-device, the sulfuration producing for collecting garbage loading embeading operation area and percolate treating apparatusHydrogen, and the hydrogen sulfide gas of collection is imported in described hydrogen sulfide removal device;
Hydrogen sulfide removal device, for making the heavy metallic oxide of described hydrogen sulfide gas and flying dust describedIn hydrogen sulfide removal device, react, generate water and insoluble metal sulfide;
Wherein, described hydrogen sulfide gathering-device comprises:
The first gathering-device, for collect the hydrogen sulfide gas producing in landfill operation district in landfill operation district,And by the first blower unit, the hydrogen sulfide gas of collection is imported in described hydrogen sulfide removal device;
The first blower unit, for importing described sulphur by the collected hydrogen sulfide gas of described the first gathering-deviceChange in hydrogen removal device; Or
Described hydrogen sulfide gathering-device comprises:
Hydrogen sulfide gas operated device, described hydrogen sulfide gas operated device is made up of the micropore wireway of some conductings; InstituteState micropore wireway be arranged in rubbish Surface mulch in landfill operation district through on the landfill cover soil of modification,The hydrogen sulfide gas producing in described landfill operation district is drained into hydrogen sulfide removal device by described micropore wireway;
Wherein, described hydrogen sulfide gathering-device also comprises:
The second blower unit, described the second blower unit connects sealing of percolate treating apparatus and processes singleFirst and described hydrogen sulfide removal device, for producing described percolate treating apparatus because processing percolateHydrogen sulfide gas is concentrated and is introduced in described hydrogen sulfide removal device after collecting.
6. the innoxious joint processing system of hydrogen sulfide as claimed in claim 5 and flying dust, is characterized in that,Described flying dust gathering-device comprises:
Flying dust collection module, for collecting domestic waste incineration furnace outlet, horizontal flue and cloth bagFlying dust in deduster;
Flying dust filling device, for being packed into sulfuration after flying dust compacting collected described flying dust collection moduleHydrogen removal device.
7. the innoxious joint processing system of the hydrogen sulfide as described in claim 5 or 6 and flying dust, its featureBe anti-in described hydrogen sulfide removal device of the heavy metallic oxide in described hydrogen sulfide gas and flying dustYing Shiwei:
xH2S+MOx→MSx+xH2O
Wherein, MOx is heavy metallic oxide; MSx is insolubility metal sulfide.
8. the innoxious joint processing system of hydrogen sulfide as claimed in claim 7 and flying dust, is characterized in that,The innoxious joint processing system of described hydrogen sulfide and flying dust also comprises:
Gas phase chromatographic device, for the heavy metallic oxide at described hydrogen sulfide gas and flying dust at described sulphurChange in hydrogen removal device and react, after generating water and insoluble metal sulfide, to the sulphur in Exhaust GasChanging hydrogen content detects;
Flying dust toxicity leaching test device, soaks for the flying dust in described hydrogen sulfide removal device is carried out to toxicityGo out test.
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| CN105478447A (en) * | 2015-12-30 | 2016-04-13 | 西南科技大学 | Treatment method for incineration fly ash of household rubbish |
| CN107570528A (en) * | 2017-10-31 | 2018-01-12 | 青岛理工大学 | A kind of stabilizing fly ash makeup is put |
| CN107900068A (en) * | 2017-10-31 | 2018-04-13 | 青岛理工大学 | One kind accelerates incinerating residue stabilization method |
| CN108008069A (en) * | 2017-11-14 | 2018-05-08 | 华电电力科学研究院 | A kind of quality of fly ash compositive appraisement system and assessment method |
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| US3579293A (en) * | 1969-10-10 | 1971-05-18 | Us Interior | Removal of hydrogen sulfide from gaseous mixtures |
| JP2972524B2 (en) * | 1994-07-29 | 1999-11-08 | 株式会社神戸製鋼所 | Separation and recovery of lead and zinc from incinerated ash |
| GB2485827A (en) * | 2010-11-25 | 2012-05-30 | Viridor Waste Man Ltd | Treatment of biogas with fly ash |
| CN102276049A (en) * | 2011-07-29 | 2011-12-14 | 北京科技大学 | Agent and method for treating hydrogen sulfide in coal mine water |
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