CN102755984A - Harmless combined treatment method and system for sulfureted hydrogen and fly ash - Google Patents
Harmless combined treatment method and system for sulfureted hydrogen and fly ash Download PDFInfo
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- CN102755984A CN102755984A CN201210236461XA CN201210236461A CN102755984A CN 102755984 A CN102755984 A CN 102755984A CN 201210236461X A CN201210236461X A CN 201210236461XA CN 201210236461 A CN201210236461 A CN 201210236461A CN 102755984 A CN102755984 A CN 102755984A
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Abstract
The embodiment of the invention discloses a harmless combined treatment method and a system for sulfureted hydrogen and fly ash, wherein the method comprises the steps of: collecting the fly ash generated in waste incineration process, and filling the fly ash in a sulfureted hydrogen removing device, wherein the fly ash contains heavy metal oxide granules; collecting the sulfureted hydrogen gas generated by landfill regions and/or percolate treating devices, and introducing the collected sulfureted hydrogen gas in the sulfureted hydrogen removing device; reacting the sulfureted hydrogen gas with the heavy metal oxides in the fly ash in the sulfureted hydrogen removing device to generate water and insoluble metal sulfide. The harmless combined treatment method and system of sulfureted hydrogen and fly ash provided by the embodiment in the invention aim at the emission characteristics of landfill H2S pollution and the physical and chemical characteristics and toxicology characteristics of fly ash incineration to solve the increasingly serious landfill odor pollution problem, improve the removal efficiency of the H2S to improve the landfill air quality and simultaneously perform the harmless fly ash incineration treatment.
Description
Technical field
The present invention relates to the garbage disposal field, relate in particular to the innoxious combination treatment method and the system of a kind of hydrogen sulfide and flying dust.
Background technology
Refuse landfill is one of topmost source of odor pollution, has received increasing concern at present.Along with The development in society and economy, the generation of China's rubbish raises year by year, and the problem of the odor pollution in the refuse landfill is mentioned more and more, because the problem that stench causes makes that also the addressing of landfill yard is difficult more." the odorant pollutant discharge standard " of China promulgation stipulated have 5 kinds to be sulphur-containing substance in the odorant of 8 kinds of needs controls in (GB14554-93).This shows that sulfur-containing compound has received more concern in the middle of the odor pollution.Hydrogen sulfide (H
2S) be foul gas important in the landfill gas, in reproducibility sulfuration thing, occupy an leading position, can indicate the concentration and the flow of other reproducibility sulfuration thing (RSC).
Big quantity research shows H
2S is the main affecting factors of odor pollution, and its contribution for stench can reach 10.92%, therefore, and through restriction H
2The discharging of S, the odor pollution that can alleviate landfill yard to a great extent.
With produce H in the commercial production
2The situation of S is different, and the hydrogen sulfide that discharges in landfill yard or other disposition of solid waste places is all in the concentration of denier.But, be merely 0.05ppb, so even the H of low concentration because the threshold value of hydrogen sulfide is lower
2S still can produce ill effect to people's sense organ.In addition, be exposed to the reaction that can cause a series of discomforts under the hydrogen sulfide gas for a long time,, even cause keratitis and some respiratory disorders like nauseating, dizziness, insomnia, poor appetite etc.Many H that discover for landfill yard periphery residents ' health situation
2The rising of S concentration has directly caused resident's negative emotions, and has caused symptoms such as mucosa irritation, the infection of the upper respiratory tract.At present, the H of refuse landfill
2S adopts the mode of spraying agent to handle usually, not only removes H
2The weak effect of S, cost height, and secondary pollution is serious.
On the other hand, waste incineration since its handle solid waste efficiently, characteristics efficiently, developed recently is rapid.Incineration of refuse flyash is meant the residue of in the flue gas purification system of garbage burning factory, collecting and getting, and generally comprises deduster flying dust and absorption tower flying dust or scrubbing tower sewage sludge.The chemical agent and the chemical reaction product that contain flue dust, adding in the flying dust.Flying ash is as a kind of high-specific surface area material, and the toxic heavy metals such as mercury, lead and cadmium that enrichment is a large amount of are a kind of hazardous wastes with heavy metal hazard profile, and health and ecological environment are had great harm.At present domestic waste incineration amount surpasses 13150t/d, is that the amount of burning away the refuse 3% is calculated according to the flying ash amount, and annual waste incineration will produce 14.4 ten thousand tons of flying dusts.The processing of flying dust and disposal also become present big technological difficulties.
Heavy metal is a pollutant component important in the incineration of refuse flyash, and the variety classes content of beary metal is widely different in the flying dust, and the content of Cu, Pb and Zn is more usually.There are some researches show, in the burning process in the refuse 33% Pb and 92% Cd transfer in the flying dust.Because the non-degradable property that heavy metal contaminants had, flying dust is with long-term existence and to the great potential threat of environment structure.The flying dust that is discharged in the environment transforms through migration, finally through food chain harmful to human and other biological body.The heavy metal that human body is taken in can cause bodily tissue organ lesion, carcinogenic.Therefore, the heavy metal pollution in the incineration of refuse flyash has caused the common concern of countries in the world with the problem of preventing and treating.
Summary of the invention
Embodiment of the invention technical problem to be solved is, to present refuse landfill H
2The discharging characteristics that S pollutes, and the physics and chemistry characteristics of flying ash and toxicology characteristic provide the innoxious combination treatment method and the system of a kind of hydrogen sulfide and flying dust, with the serious day by day refuse landfill odor pollution problem of solution, and raising H
2The removal efficient of S changes the 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 invention provides the innoxious combination treatment method of a kind of hydrogen sulfide and flying dust, comprising:
Collect the flying dust that produces in the waste incineration process, and with its hydrogen sulfide removal device of packing into; Contain the heavy metallic oxide particle in the said flying dust;
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 the said hydrogen sulfide removal device;
Heavy metallic oxide in said hydrogen sulfide gas and the flying dust reacts in said hydrogen sulfide removal device, generates water and insoluble metal sulfide.
Wherein, the flying dust that produces in the said collection waste incineration process, and with its hydrogen sulfide removal device of packing into, comprising:
Collect the flying dust in furnace outlet, horizontal flue and the sack cleaner in the domestic waste incineration;
With being packed into the hydrogen sulfide removal device after the flying dust compacting of collecting.
Wherein, the hydrogen sulfide gas that said collection garbage loading embeading operation area and/or percolate treating apparatus produce, and the hydrogen sulfide gas of collecting imported in the said hydrogen sulfide removal device, comprising:
In the landfill operation district, utilize the hydrogen sulfide gathering-device to collect the hydrogen sulfide gas that produces in the landfill operation district, and the collected hydrogen sulfide gas of said hydrogen sulfide gathering-device is imported in the said hydrogen sulfide removal device through blower unit; Or
Rubbish top layer in the landfill operation district covers the landfill earthing of one deck through modification, and on soil layer, arranges the micropore wireway, and said micropore wireway drains into the hydrogen sulfide gas removal device with the hydrogen sulfide gas that produces in the said landfill operation district.
Wherein, the hydrogen sulfide gas that said collection garbage loading embeading operation area and/or percolate treating apparatus produce, and the hydrogen sulfide gas of collecting imported in the said hydrogen sulfide removal device, comprising:
The processing unit place that seals at the percolate treating apparatus is provided with the hydrogen sulfide removal device, collects in the said hydrogen sulfide removal device of the concentrated introducing in back through blower unit produces said percolate treating apparatus because of the processing percolate hydrogen sulfide gas.
Wherein, the heavy metallic oxide in said hydrogen sulfide gas and the flying dust reacts in said hydrogen sulfide removal device, generates in water and the insoluble metal sulfide, and concrete reaction equation is:
H
2S+MO
x→MS
x+xH
2O
Wherein, MOx is a heavy metallic oxide; MSx is the insolubility metal sulfide.
Wherein, the heavy metallic oxide in said hydrogen sulfide gas and the flying dust reacts in said hydrogen sulfide removal device, generates after water and the insoluble metal sulfide, also comprises:
Flying dust in the said hydrogen sulfide removal device leaches toxotest, carries out safe disposal to leaching toxicity flying dust up to standard after tested.
Accordingly, the embodiment of the invention also provides the innoxious joint processing system of a kind of hydrogen sulfide and flying dust, comprising:
The flying dust gathering-device is used for collecting the flying dust that the waste incineration process produces, and with its hydrogen sulfide removal device of packing into; Contain the heavy metallic oxide particle in the said flying dust;
The hydrogen sulfide gathering-device is used to collect the hydrogen sulfide gas of garbage loading embeading operation area and/or the generation of percolate treating apparatus, and the hydrogen sulfide gas of collecting is imported in the said hydrogen sulfide removal device;
The hydrogen sulfide removal device is used for making the heavy metallic oxide of said hydrogen sulfide gas and flying dust in said hydrogen sulfide removal device, to react, and generates water and insoluble metal sulfide.
Wherein, said flying dust gathering-device comprises:
The flying dust collection module is used for collecting the flying dust in domestic waste incineration furnace outlet, horizontal flue and the sack cleaner;
The flying dust filling device is used for being packed into the hydrogen sulfide removal device after the flying dust compacting that said flying dust collection module is collected.
Wherein, said hydrogen sulfide gathering-device comprises:
First gathering-device is used in the landfill operation district, collecting the hydrogen sulfide gas that produces in the landfill operation district, and through first blower unit hydrogen sulfide gas of collecting is imported in the said hydrogen sulfide removal device;
First blower unit is used for the collected hydrogen sulfide gas of said first gathering-device is imported said hydrogen sulfide removal device; Or
Said hydrogen sulfide gathering-device comprises:
The hydrogen sulfide gas operated device, said hydrogen sulfide gas operated device is made up of the micropore wireway of some conductings; Said micropore wireway is arranged on the process landfill earthing of modification of the rubbish top layer covering in the landfill operation district, and said micropore wireway drains into the hydrogen sulfide removal device with the hydrogen sulfide gas that produces in the said landfill operation district.
Wherein, said hydrogen sulfide gathering-device comprises:
Second blower unit; What said second blower unit connected the percolate treating apparatus seals processing unit and said hydrogen sulfide removal device, is used for that said percolate treating apparatus is collected the back because of the hydrogen sulfide gas of handling percolate and producing and concentrates and introduce said hydrogen sulfide removal device.
Wherein, the reaction equation of the heavy metallic oxide in said hydrogen sulfide gas and the flying dust in said hydrogen sulfide removal device is:
H
2S+MO
x→MS
x+xH
2O
Wherein, MOx is a heavy metallic oxide; MSx is the insolubility metal sulfide.
Wherein, the innoxious joint processing system of said hydrogen sulfide and flying dust also comprises:
Gas phase chromatographic device is used for reacting in said hydrogen sulfide removal device at the heavy metallic oxide of said hydrogen sulfide and flying dust, generates after water and the insoluble metal sulfide, and the hydrogen sulfide content of discharging in the gas is detected;
Flying dust toxicity leaching test device is used for the flying dust in the said hydrogen sulfide removal device is carried out the toxicity leaching test, to carrying out safe disposal through toxicity leaching test flying dust up to standard.
The innoxious combination treatment method and the system of hydrogen sulfide that embodiment of the present invention embodiment provided and flying dust have following beneficial effect at least: 1, significantly reduce garbage loading embeading operation area H
2The S discharging improves the air regime of landfill reservoir area; 2, effectively reduce the H of percolate treatment plant
2The S burst size, protection workman and peripheral residents ' health; 3, accomplish incineration of refuse flyash harmless treatment and comprehensive utilization; 4, realized landfill yard H
2S pollutes control and flying ash comprehensive utilization.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the innoxious combination treatment method first embodiment schematic flow sheet of hydrogen sulfide provided by the invention and flying dust;
Fig. 2 is the innoxious combination treatment method second embodiment schematic flow sheet of hydrogen sulfide provided by the invention and flying dust;
Part heavy metal leachable concentration for flying dust before and after the reaction shown in Figure 3;
Fig. 4 is innoxious combination treatment method the 3rd embodiment schematic flow sheet of hydrogen sulfide provided by the invention and flying dust;
Fig. 5 is the innoxious joint processing system first example structure sketch map of hydrogen sulfide provided by the invention and flying dust;
Fig. 6 is the innoxious joint processing system second example structure sketch map of hydrogen sulfide provided by the invention and flying dust;
Fig. 7 is the innoxious joint processing system simulation drawing of hydrogen sulfide provided by the invention and flying dust.
The specific embodiment
The innoxious combination treatment method of hydrogen sulfide that the embodiment of the invention provided and flying dust and system are to present refuse landfill H
2The discharging characteristics that S pollutes, and the physics and chemistry characteristics of flying ash and toxicology characteristic can solve serious day by day refuse landfill odor pollution problem, improve H
2The removal efficient of S changes the landfill yard air quality, carries out the processing of making fly-ash from incineration harmless simultaneously.
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Referring to Fig. 1, be the innoxious combination treatment method first embodiment schematic flow sheet of hydrogen sulfide provided by the invention and flying dust.As shown in Figure 1, this method comprises:
Step S100 collects the flying dust that produces in the waste incineration process, and with its hydrogen sulfide removal device of packing into; Contain the heavy metallic oxide particle in the said flying dust.
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 collecting is imported in the said hydrogen sulfide removal device.
Step S102, the heavy metallic oxide in said hydrogen sulfide gas and the flying dust reacts in said hydrogen sulfide removal device, generates water and insoluble metal sulfide.
The innoxious combination treatment method of hydrogen sulfide that the embodiment of the invention provided and flying dust is to present refuse landfill H
2The discharging characteristics that S pollutes, and the physics and chemistry characteristics of flying ash and toxicology characteristic utilize the heavy metal in the flying dust mainly to exist with the form of oxidation state, with the foul gas H of itself and reproducibility
2S carries out redox reaction, effectively the heavy metallic oxide in the flying ash is cured, and the flying dust that will belong to danger wastes becomes common discarded object, reduces the flying dust processing cost.Simultaneously also flying dust is carried out recycling, effectively removed H
2S.The innoxious combination treatment method of hydrogen sulfide that present embodiment provides and flying dust can solve serious day by day refuse landfill odor pollution problem, improves H
2The removal efficient of S changes the landfill yard air quality, carries out the processing of making fly-ash from incineration harmless simultaneously.
Referring to Fig. 2, be the innoxious combination treatment method second embodiment schematic flow sheet of hydrogen sulfide provided by the invention and flying dust.As shown in Figure 2, this method comprises:
Step S200 collects the flying dust in furnace outlet, horizontal flue and the sack cleaner in the domestic waste incineration.
More concrete, waste incineration since its handle solid waste efficiently, characteristics efficiently, developed recently is rapid.Incineration of refuse flyash is meant the residue of in the flue gas purification system of incinerator, collecting and getting, the flying dust in the incinerator in furnace outlet, horizontal flue and the sack cleaner.The a large amount of toxic heavy metals such as mercury, lead and cadmium of enrichment are a kind of hazardous wastes that has the various heavy hazard profile simultaneously in the flying dust, and health and ecological environment are had great harmfulness.
Step S201 is with being packed into the hydrogen sulfide removal device after the flying dust compacting of collecting.
Step S202 in the landfill operation district, utilizes the hydrogen sulfide gathering-device to collect the hydrogen sulfide gas that produces in the landfill operation district, and through blower unit the collected hydrogen sulfide gas of said hydrogen sulfide gathering-device is imported in the said hydrogen sulfide removal device; Or the landfill earthing of the covering of the rubbish top layer in landfill operation district one deck process modification, and on soil layer, arrange the micropore wireway, said micropore wireway drains into the hydrogen sulfide gas removal device with the hydrogen sulfide gas that produces in the said landfill operation district.
Further; This step can be by cram packer rubbish to be poured in the landfill operation district; Utilize blower unit that the hydrogen sulfide gas of landfill operation unit is sent into the hydrogen sulfide removal device, or the further compacting rubbish of toppling over, and cover the earthing of one deck modification in the waste layer surface; Evenly arrange micropore wireway, the H that garbage degradation produces on the soil layer
2S gas gets into marsh gas power generation factory through getting into the hydrogen sulfide removal device behind the conduit through purified gas.
More concrete, the garbage loading embeading operation area is H
2The main region of S discharging.H
2S has in this regional discharging that generation is big, uncontrollable discharge, continuation is long and influence characteristics such as extensive.Traditional method is applicable to more removes H in the commercial production
2S, and for no group that produces in landfill operation district H that discharges
2S has the shortcoming of expensive poor efficiency.The embodiment of the invention is provided with the hydrogen sulfide gas removal device in the landfill operation district, and by blower unit hydrogen sulfide is introduced in the removal device, can effectively cut down the consumption of energy, and obtain preferable H
2The S removal effect.Simultaneously, rubbish covers last layer modification earthing after compacting, can effectively suppress H
2S distributes.The gas that the landfill layer produces drains into H through wireway
2Behind the S removal device, can directly get into marsh gas power generation factory generating production capacity, alleviate H greatly
2S helps to prolong equipment life for the corrosion of electric power factory equipment.
Step S203, the heavy metallic oxide in said hydrogen sulfide gas and the flying dust reacts in said hydrogen sulfide removal device, generates water and insoluble metal sulfide.Heavy metallic oxide in said hydrogen sulfide gas and the flying dust reacts in said hydrogen sulfide removal device, generates in water and the insoluble metal sulfide, and concrete reaction equation is:
H
2S+MO
x→MS
x+xH
2O
Wherein, MOx is a heavy metallic oxide; MSx is the insolubility metal sulfide.
More concrete, processing mainly comprises high-temperature process (fusion and sintering), cement solidification processing and wet chemical treatment three types of technology to this type of incineration of refuse flyash hazardous waste.Yet said method exists energy consumption big, needs shortcomings such as chemical agent consumption.The embodiment of the invention is utilized the physicochemical property of flying dust, promptly wherein contains a large amount of metal oxides, can with the characteristics of hydrogen sulfide generation redox reaction, incineration of refuse flyash has been carried out recycling.Through with H
2The reaction of S makes the heavy metal leaching toxicity of flying ash be significantly reduced.After leaching toxotest, again flying dust is carried out safe disposal, reduce harm environment.
Step S204 leaches toxotest to the flying dust in the said hydrogen sulfide removal device, carries out safe disposal to leaching toxicity flying dust up to standard through test.More concrete, the method that the embodiment of the invention provides is utilized the characteristic and the hydrogen sulfide emission characteristics of incineration of refuse flyash, has carried out H
2H has been contained in the S control and the innoxious comprehensive regulation of flying dust
2The discharging of S also effectively reduces the toxicity of flying dust.Through verification experimental verification, through the H of the inventive method processing
2The S clearance can reach more than 90%, and concentration of emission can reach " odorant pollutant discharge standard " primary standard limit value (GB14554-93).Flying ash obviously reduces through reaction leaching toxicity later.Be illustrated in figure 3 as the part heavy metal leachable concentration of reaction front and back flying dust; The leaching concentration that can see four heavy metal species such as Cr, Cu, Cd, Pb has all had significant decline; This explanation flying dust obviously reduces through the leaching toxicity after the reaction, far below the concentration limit of " hazardous waste judging standard-leachings toxicity discriminating " each heavy metal ion in (GB5085.3-2007).With metal Cd is example, and the leaching concentration of Cd is near 10000ppb before reaction, and the leaching concentration limit in the national standard is 1000ppb, and the flying ash before the reaction meets the standard of hazardous waste; And be reduced to 86ppb through the leaching concentration of reaction back flying ash Cd, far below the concentration limit in the standard, leach toxicity and reduce greatly.The heavy metal contaminants of other kinds has also obtained treatment effect preferably.This shows that the inventive method has good environment and social benefit.
Referring to Fig. 4, be innoxious combination treatment method the 3rd embodiment schematic flow sheet of hydrogen sulfide provided by the invention and flying dust.The difference that present embodiment and last is implemented is H
2The generation source of S and corresponding H
2The S collection mode is different, and other step and a last embodiment are basic identical, so be not described in detail in the present embodiment.
As shown in Figure 4, this method comprises:
Step S300 collects the flying dust in furnace outlet, horizontal flue and the sack cleaner in the domestic waste incineration.
Step S301 is with being packed into the hydrogen sulfide removal device after the flying dust compacting of collecting.
Step S302; The processing unit place that seals at the percolate treating apparatus is provided with the hydrogen sulfide removal device, collects in the said hydrogen sulfide removal device of the concentrated introducing in back through blower unit produces said percolate treating apparatus because of the processing percolate hydrogen sulfide gas.
More concrete, percolate treatment plant is that H2S pollutes comparatively serious zone in the landfill yard.Be not equipped with the percolate treatment plant of gas collection and treatment technology at the percolate treating apparatus, the H2S gas that is produced by percolate has all caused serious harm to staff's living environment physically and mentally healthy and peripheral resident.The present invention seals processing unit equipment H2S gas removal device to each of percolate treating apparatus in the percolate treatment plant; The H2S that produces in the percolate processing procedure is focused on discharging; Can improve the workman's of percolate treatment plant working environment greatly, solve the H2S pollution problem.
Step S303, the heavy metallic oxide in said hydrogen sulfide gas and the flying dust reacts in said hydrogen sulfide removal device, generates water and insoluble metal sulfide.
Step S304 leaches toxotest to the flying dust in the said hydrogen sulfide removal device, carries out safe disposal to leaching toxicity flying dust up to standard through test.
Certainly, the method that provides of a present embodiment and a last embodiment can be carried out simultaneously.
The innoxious combination treatment method of hydrogen sulfide that the embodiment of the invention provided and flying dust is to present refuse landfill H
2The discharging characteristics that S pollutes, and the physics and chemistry characteristics of flying ash and toxicology characteristic can solve serious day by day refuse landfill odor pollution problem, improve H
2The removal efficient of S changes the landfill yard air quality, carries out the processing of making fly-ash from incineration harmless simultaneously.
Referring to Fig. 5, be the innoxious joint processing system first example structure sketch map of hydrogen sulfide provided by the invention and flying dust, 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 is used for collecting the flying dust that the waste incineration process produces, and with its hydrogen sulfide removal device 3 of packing into; Contain the heavy metallic oxide particle in the said flying dust.
Hydrogen sulfide gathering-device 2 is used to collect the hydrogen sulfide gas of garbage loading embeading operation area and/or the generation of percolate treating apparatus, and the hydrogen sulfide gas of collecting is imported in the said hydrogen sulfide removal device 3.
Hydrogen sulfide removal device 3 is used for making the heavy metallic oxide of said hydrogen sulfide gas and flying dust in said hydrogen sulfide removal device 3, to react, and generates water and insoluble metal sulfide.
The innoxious joint processing system of hydrogen sulfide that the embodiment of the invention provided and flying dust is to present refuse landfill H
2The discharging characteristics that S pollutes, and the physics and chemistry characteristics of flying ash and toxicology characteristic utilize the heavy metal in the flying dust mainly to exist with the form of oxidation state, with the foul gas H of itself and reproducibility
2S carries out redox reaction, effectively the heavy metallic oxide in the flying ash is cured, and the flying dust that will belong to danger wastes becomes common discarded object, reduces the flying dust processing cost.Simultaneously also flying dust is carried out recycling, effectively removed H
2S.The innoxious joint processing system of hydrogen sulfide that present embodiment provides and flying dust can solve serious day by day refuse landfill odor pollution problem, improves H
2The removal improved efficiency landfill yard air quality of S is carried out the processing of making fly-ash from incineration harmless simultaneously.
Referring to Fig. 6, be the innoxious joint processing system second example structure sketch map of hydrogen sulfide provided by the invention and flying dust, in the present embodiment, with the structure and the composition of more detailed this system of description.As shown in Figure 6, this system comprises: flying dust gathering-device 1, hydrogen sulfide gathering-device 2, hydrogen sulfide removal device 3.
Flying dust gathering-device 1 is used for collecting the flying dust that the waste incineration process produces, and with its hydrogen sulfide removal device 3 of packing into; Contain the heavy metallic oxide particle in the said flying dust.More concrete, said flying dust gathering-device 1 comprises:
Flying dust collection module 11 is used for collecting the flying dust in domestic waste incineration furnace outlet, horizontal flue and the sack cleaner.More concrete, waste incineration since its handle solid waste efficiently, characteristics efficiently, developed recently is rapid.Incineration of refuse flyash is meant the residue of in the flue gas purification system of incinerator, collecting and getting, and first gathering-device 21 is used for the flying dust in incinerator furnace outlet, horizontal flue and sack cleaner.The a large amount of toxic heavy metals such as mercury, lead and cadmium of enrichment are a kind of hazardous wastes that has the various heavy hazard profile simultaneously in the flying dust, and health and ecological environment are had great harmfulness.
Flying dust filling device 12 is used for being packed into hydrogen sulfide removal device 3 after the flying dust compacting that said flying dust collection module 11 is collected.
Hydrogen sulfide gathering-device 2 is used to collect the hydrogen sulfide gas of garbage loading embeading operation area and/or the generation of percolate treating apparatus, and the hydrogen sulfide gas of collecting is imported in the said hydrogen sulfide removal device 3.More concrete, said hydrogen sulfide gathering-device 2 comprises:
First gathering-device 21 is used in the landfill operation district, collecting the hydrogen sulfide gas that produces in the landfill operation district, and through first blower unit 22 hydrogen sulfide gas of collecting is imported in the said hydrogen sulfide removal device.
First blower unit 22 is used for the collected hydrogen sulfide gas of said first gathering-device is imported said hydrogen sulfide removal device.
Further; This step can be by cram packer rubbish to be poured in the landfill operation district; Utilize blower unit that the hydrogen sulfide gas of landfill operation unit is sent into the hydrogen sulfide removal device, or the further compacting rubbish of toppling over, and cover the earthing of one deck modification in the waste layer surface; Evenly arrange micropore wireway, the H that garbage degradation produces on the soil layer
2S gas gets into marsh gas power generation factory through getting into the hydrogen sulfide removal device behind the conduit through purified gas.
More concrete, the garbage loading embeading operation area is H
2The main region of S discharging.H
2S has in this regional discharging that generation is big, uncontrollable discharge, continuation is long and influence characteristics such as extensive.Traditional method is applicable to more removes H in the commercial production
2S, and for no group that produces in landfill operation district H that discharges
2S has the shortcoming of expensive poor efficiency.The embodiment of the invention is provided with first gathering-device 21 and collects the H that overflow the garbage loading embeading operation area in the landfill operation district
2S, and by first blower unit 22 hydrogen sulfide is introduced in the hydrogen sulfide removal device 3, can effectively cut down the consumption of energy, and obtain preferable H
2The S removal effect.
Further, the present invention also provides the another embodiment of said hydrogen sulfide gathering-device 2, and in this embodiment, said hydrogen sulfide gathering-device 2 comprises:
Hydrogen sulfide gas operated device 23, said hydrogen sulfide gas operated device is made up of the micropore wireway of some conductings; Said micropore wireway is arranged on the process landfill earthing of modification of the rubbish top layer covering in the landfill operation district, and said micropore wireway drains into hydrogen sulfide removal device 3 with the hydrogen sulfide gas that produces in the said landfill operation district.
Preferably, this hydrogen sulfide gas operated device 23 can be used with first gathering-device 21, first blower unit 22.Rubbish covers last layer modification earthing after compacting, can effectively suppress H
2S distributes.The gas that the landfill layer produces drains into H through wireway
2Behind the S removal device, can directly get into marsh gas power generation factory generating production capacity, alleviate H greatly
2S helps to prolong equipment life for the corrosion of electric power factory equipment.
Further, the present invention also provides another embodiment of said hydrogen sulfide gathering-device 2, and in this embodiment, said hydrogen sulfide gathering-device 2 comprises:
Preferably, this second blower unit 24 can be used with aforesaid hydrogen sulfide gas operated device 23, first gathering-device 21, first blower unit 22.
Hydrogen sulfide removal device 3 is used for making the heavy metallic oxide of said hydrogen sulfide gas and flying dust in said hydrogen sulfide removal device 3, to react, and generates water and insoluble metal sulfide.Wherein, the reaction equation of the heavy metallic oxide in said hydrogen sulfide gas and the flying dust in said hydrogen sulfide removal device is:
H
2S+MO
x→MS
x+xH
2O
Wherein, MOx is a heavy metallic oxide; MSx is the insolubility metal sulfide.More concrete, processing mainly comprises high-temperature process (fusion and sintering), cement solidification processing and wet chemical treatment three types of technology to this type of incineration of refuse flyash hazardous waste.Yet said method exists energy consumption big, needs shortcomings such as chemical agent consumption.The embodiment of the invention is utilized the physicochemical property of flying dust, promptly wherein contains a large amount of metal oxides, can with the characteristics of hydrogen sulfide generation redox reaction, incineration of refuse flyash has been carried out recycling.Through with H
2The reaction of S makes the heavy metal leaching toxicity of flying ash be significantly reduced.After leaching toxotest, again flying dust is carried out safe disposal, reduce harm environment.
Further, the innoxious joint processing system of said hydrogen sulfide and flying dust also comprises:
Gas phase chromatographic device 4 is used for reacting in said hydrogen sulfide removal device 3 at the heavy metallic oxide of said hydrogen sulfide and flying dust, generates after water and the insoluble metal sulfide, and the hydrogen sulfide content of discharging in the gas is detected;
Flying dust toxicity leaching test device 5 is used for the flying dust in the said hydrogen sulfide removal device is carried out the toxicity leaching test, to carrying out safe disposal through toxicity leaching test flying dust up to standard.
The system more concrete, that the embodiment of the invention provides utilizes the characteristic and the hydrogen sulfide emission characteristics of incineration of refuse flyash, has carried out H
2H has been contained in the S control and the innoxious comprehensive regulation of flying dust
2The discharging of S also effectively reduces the toxicity of flying dust.Through verification experimental verification, through the H of the inventive method processing
2The S clearance can reach more than 90%, and concentration of emission can reach " odorant pollutant discharge standard " primary standard limit value (GB14554-93).Flying ash obviously reduces through reaction leaching toxicity later.Be illustrated in figure 3 as the part heavy metal leachable concentration of reaction front and back flying dust; The leaching concentration that can see four heavy metal species such as Cr, Cu, Cd, Pb has all had significant decline; This explanation flying dust obviously reduces through the leaching toxicity after the reaction, far below the concentration limit of " hazardous waste judging standard-leachings toxicity discriminating " each heavy metal ion in (GB5085.3-2007).With metal Cd is example, and the leaching concentration of Cd is near 10000ppb before reaction, and the leaching concentration limit in the national standard is 1000ppb, and the flying ash before the reaction meets the standard of hazardous waste; And be reduced to 86ppb through the leaching concentration of reaction back flying ash Cd, far below the concentration limit in the standard, leach toxicity and reduce greatly.The heavy metal contaminants of other kinds has also obtained treatment effect preferably.This shows that system provided by the invention 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, the innoxious joint processing system of this hydrogen sulfide and flying dust is to present refuse landfill H
2The discharging characteristics that S pollutes, and the physics and chemistry characteristics of flying ash and toxicology characteristic utilize the heavy metal in the flying dust mainly to exist with the form of oxidation state, with the foul gas H of itself and reproducibility
2S carries out redox reaction, effectively the heavy metallic oxide in the flying ash is cured, and the flying dust that will belong to danger wastes becomes common discarded object, reduces the flying dust processing cost.Simultaneously also flying dust is carried out recycling, effectively removed H
2S.The innoxious joint processing system of hydrogen sulfide that present embodiment provides and flying dust can solve serious day by day refuse landfill odor pollution problem, improves H
2The removal efficient of S changes the landfill yard air quality, carries out the processing of making fly-ash from incineration harmless simultaneously.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method; Be to instruct relevant hardware to accomplish through computer program; Described program can be stored in the computer read/write memory medium; This program can comprise the flow process like the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
Above disclosedly be merely a kind of preferred embodiment of the present invention, can not limit the present invention's interest field certainly with this, the equivalent variations of therefore doing according to claim of the present invention still belongs to the scope that the present invention is contained.
Claims (12)
1. the innoxious combination treatment method of hydrogen sulfide and flying dust is characterized in that, comprising:
Collect the flying dust that produces in the waste incineration process, and with its hydrogen sulfide removal device of packing into; Contain the heavy metallic oxide particle in the said flying dust;
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 the said hydrogen sulfide removal device;
Heavy metallic oxide in said hydrogen sulfide gas and the flying dust reacts in said hydrogen sulfide removal device, generates water and insoluble metal sulfide.
2. the innoxious combination treatment method of hydrogen sulfide as claimed in claim 1 and flying dust is characterized in that, the flying dust that produces in the said collection waste incineration process, and with its hydrogen sulfide removal device of packing into, comprising:
Collect the flying dust in furnace outlet, horizontal flue and the sack cleaner in the domestic waste incineration;
With being packed into the hydrogen sulfide removal device after the flying dust compacting of collecting.
3. the innoxious combination treatment method of hydrogen sulfide as claimed in claim 1 and flying dust; It is characterized in that; The hydrogen sulfide gas that said collection garbage loading embeading operation area and/or percolate treating apparatus produce, and the hydrogen sulfide gas of collecting imported in the said hydrogen sulfide removal device, comprising:
In the landfill operation district, utilize the hydrogen sulfide gathering-device to collect the hydrogen sulfide gas that produces in the landfill operation district, and the collected hydrogen sulfide gas of said hydrogen sulfide gathering-device is imported in the said hydrogen sulfide removal device through blower unit; Or
Rubbish top layer in the landfill operation district covers the landfill earthing of one deck through modification, and on soil layer, arranges the micropore wireway, and said micropore wireway drains into the hydrogen sulfide gas removal device with the hydrogen sulfide gas that produces in the said landfill operation district.
4. the innoxious combination treatment method of hydrogen sulfide as claimed in claim 1 and flying dust; It is characterized in that; The hydrogen sulfide gas that said collection garbage loading embeading operation area and/or percolate treating apparatus produce, and the hydrogen sulfide gas of collecting imported in the said hydrogen sulfide removal device, comprising:
The processing unit place that seals at the percolate treating apparatus is provided with the hydrogen sulfide removal device, collects in the said hydrogen sulfide removal device of the concentrated introducing in back through blower unit produces said percolate treating apparatus because of the processing percolate hydrogen sulfide gas.
5. like the innoxious combination treatment method of each described hydrogen sulfide and flying dust in the claim 1 to 4; It is characterized in that; Heavy metallic oxide in said hydrogen sulfide gas and the flying dust reacts in said hydrogen sulfide removal device; Generate in water and the insoluble metal sulfide, concrete reaction equation is:
H
2S+MO
x→MS
x+xH
2O
Wherein, MOx is a heavy metallic oxide; MSx is the insolubility metal sulfide.
6. the innoxious combination treatment method of hydrogen sulfide as claimed in claim 5 and flying dust; It is characterized in that; Heavy metallic oxide in said hydrogen sulfide gas and the flying dust reacts in said hydrogen sulfide removal device, generates after water and the insoluble metal sulfide, also comprises:
Flying dust in the said hydrogen sulfide removal device leaches toxotest, carries out safe disposal to leaching toxicity flying dust up to standard after tested.
7. the innoxious joint processing system of hydrogen sulfide and flying dust is characterized in that, comprising:
The flying dust gathering-device is used for collecting the flying dust that the waste incineration process produces, and with its hydrogen sulfide removal device of packing into; Contain the heavy metallic oxide particle in the said flying dust;
The hydrogen sulfide gathering-device is used to collect the hydrogen sulfide gas of garbage loading embeading operation area and/or the generation of percolate treating apparatus, and the hydrogen sulfide gas of collecting is imported in the said hydrogen sulfide removal device;
The hydrogen sulfide removal device is used for making the heavy metallic oxide of said hydrogen sulfide gas and flying dust in said hydrogen sulfide removal device, to react, and generates water and insoluble metal sulfide.
8. the innoxious joint processing system of hydrogen sulfide as claimed in claim 7 and flying dust is characterized in that, said flying dust gathering-device comprises:
The flying dust collection module is used for collecting the flying dust in domestic waste incineration furnace outlet, horizontal flue and the sack cleaner;
The flying dust filling device is used for being packed into the hydrogen sulfide removal device after the flying dust compacting that said flying dust collection module is collected.
9. the innoxious joint processing system of hydrogen sulfide as claimed in claim 7 and flying dust is characterized in that, said hydrogen sulfide gathering-device comprises:
First gathering-device is used in the landfill operation district, collecting the hydrogen sulfide gas that produces in the landfill operation district, and through first blower unit hydrogen sulfide gas of collecting is imported in the said hydrogen sulfide removal device;
First blower unit is used for the collected hydrogen sulfide gas of said first gathering-device is imported said hydrogen sulfide removal device; Or
Said hydrogen sulfide gathering-device comprises:
The hydrogen sulfide gas operated device, said hydrogen sulfide gas operated device is made up of the micropore wireway of some conductings; Said micropore wireway is arranged on the process landfill earthing of modification of the rubbish top layer covering in the landfill operation district, and said micropore wireway drains into the hydrogen sulfide removal device with the hydrogen sulfide gas that produces in the said landfill operation district.
10. the innoxious joint processing system of hydrogen sulfide as claimed in claim 7 and flying dust is characterized in that, said hydrogen sulfide gathering-device comprises:
Second blower unit; What said second blower unit connected the percolate treating apparatus seals processing unit and said hydrogen sulfide removal device, is used for that said percolate treating apparatus is collected the back because of the hydrogen sulfide gas of handling percolate and producing and concentrates and introduce said hydrogen sulfide removal device.
11. the innoxious joint processing system like each described hydrogen sulfide and flying dust in the claim 7 to 10 is characterized in that, the reaction equation of the heavy metallic oxide in said hydrogen sulfide gas and the flying dust in said hydrogen sulfide removal device is:
H
2S+MO
x→MS
x+xH
2O
Wherein, MOx is a heavy metallic oxide; MSx is the insolubility metal sulfide.
12. the innoxious joint processing system of hydrogen sulfide as claimed in claim 11 and flying dust is characterized in that, the innoxious joint processing system of said hydrogen sulfide and flying dust also comprises:
Gas phase chromatographic device is used for reacting in said hydrogen sulfide removal device at the heavy metallic oxide of said hydrogen sulfide and flying dust, generates after water and the insoluble metal sulfide, and the hydrogen sulfide content of discharging in the gas is detected;
Flying dust toxicity leaching test device is used for the flying dust in the said hydrogen sulfide removal device is carried out the toxicity leaching test, to carrying out safe disposal through toxicity leaching test flying dust up to standard.
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| CN201210236461.XA CN102755984B (en) | 2012-07-10 | 2012-07-10 | Innoxious combination treatment method and the system of a kind of hydrogen sulfide and flying dust |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| JPH0841555A (en) * | 1994-07-29 | 1996-02-13 | Kobe Steel Ltd | Fractional recovery of lead and zinc from incinerated 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 |
| EP2457982A1 (en) * | 2010-11-25 | 2012-05-30 | Viridor Waste Management Limited | Method for the treatment of biogas |
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| US3579293A (en) * | 1969-10-10 | 1971-05-18 | Us Interior | Removal of hydrogen sulfide from gaseous mixtures |
| JPH0841555A (en) * | 1994-07-29 | 1996-02-13 | Kobe Steel Ltd | Fractional recovery of lead and zinc from incinerated ash |
| EP2457982A1 (en) * | 2010-11-25 | 2012-05-30 | Viridor Waste Management Limited | Method for the treatment of biogas |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| Publication number | Publication date |
|---|---|
| CN102755984B (en) | 2016-05-04 |
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