CN109000268A - A kind of processing of high-temperature melting method burns converter fly ash process containing dioxin - Google Patents
A kind of processing of high-temperature melting method burns converter fly ash process containing dioxin Download PDFInfo
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- CN109000268A CN109000268A CN201810558877.0A CN201810558877A CN109000268A CN 109000268 A CN109000268 A CN 109000268A CN 201810558877 A CN201810558877 A CN 201810558877A CN 109000268 A CN109000268 A CN 109000268A
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- dioxin
- temperature
- dust
- melting furnace
- fly ash
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/30—Solid combustion residues, e.g. bottom or flyash
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The present invention provides a kind of processing of high-temperature melting method and burns converter fly ash process containing dioxin, the process is to burn converter fly ash containing dioxin, flux, binder and unclassified stores are raw material, pelletizing is made by disk pelletizing mode after mixing, or agglomerate is made by briquetting mode, then melting furnace is added by a certain percentage and carries out high-temperature fusion reduction, dioxin is decomposed at high temperature, part metals element in flying dust is deposited in melting furnace lower part, the coal gas of high temperature of formation separates carbonaceous dust by cyclone dust removal, it is recycled, remaining high-temperature mixed gas is after secondary combustion chamber high-temp combustion, dioxin substantially eliminates, enter heat exchanger later and carries out the temperature range that chilling quickly crosses generation dioxin, it is inhibited to synthesize again, then through bag filter further isolated content of beary metal compared with High dust, melting furnace collective low heavy metal slag.
Description
Technical field
The invention belongs to environmental technology fields, and in particular to a kind of processing of high-temperature melting method burns converter fly ash work containing dioxin
Skill method.
Background technique
Incineration treatment of garbage is to realize a kind of effective way of garbage as resource, also complies with the current refuse production in China
Greatly, the national conditions of land resource shortage and energy shortages.But the secondary pollution especially dioxin contamination one that waste incineration generates
It is not well solved directly；Data show that the dioxin in natural environment has 95% incinerator for deriving from waste incineration
In, the dioxin for insufficient generation of burning can discharge into the atmosphere with flue gas, (such as by various biological and earth reciprocations
Gas-soil interaction, gas-sea interaction, atmospheric air circulation and biological chain circulation etc.) enter in other environment and the ecosystem, lead to the whole world
The pollution spread of property；And the toxicity of dioxin is extremely strong, has carcinogenicity, mutagenicity and deforming characteristic to human body；Therefore
Carrying out processing to the flying dust containing dioxin that incinerator generates has very big environmental benefit and social benefit.
Melting and reducing furnace technology is more concerned for handling solid waste, the technique of dust, and melting furnace can will contain two evils
English burns converter fly ash pyrolytic and deviates from objectionable impurities, and obtains part heavy metal, and the high-temperature region temperature of the technique is high advantageous
It can effectively inhibit dioxin in the synthesis again of low-temperature space in the decomposition of dioxin, and by follow-up process.It realizes good
Economic benefit and environmental benefit.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of processing of high-temperature melting method and burns converter fly ash technique side containing dioxin
Pelletizing will be made by disk pelletizing mode after dioxin burning converter fly ash and additive mixing in method, the process, or
Agglomerate is made by briquetting mode, dioxin flying dust pelletizing or agglomerate are added in melting furnace and carry out high-temperature fusion reduction, flying dust
In part metals element deposited in melting furnace lower part, the coal gas of high temperature of formation isolates carbonaceous dust by cyclone dust removal
Come, is recycled, after secondary combustion chamber high-temp combustion, dioxin substantially eliminates remaining high-temperature mixed gas, later
The temperature range that chilling quickly crosses generation dioxin is carried out into heat exchanger, inhibits it to synthesize again, is then removed through cloth bag
The further higher dust of isolated content of beary metal of dirt device, melting furnace collective low heavy metal slag；
Further, the process the following steps are included:
(1): when mixing add 30% ~ 70% containing dioxin burn converter fly ash, 0% ~ 25% unclassified stores, 0% ~ 5% flux and
0% ~ 10% binder, and according to the water for the additive amount supplying 5% ~ 10% for burning converter fly ash containing dioxin；
(2): by raw material after mixing by being stored after natural curing 72h to roll-in ball machine or vibration ball-pressing machine briquet
It is spare to stock ground, or pelletizing is made using disk pelletizing mode；
(3): finished product agglomerate made of dioxin burning converter fly ash will be contained and be transported to furnace top bin according to a certain percentage, by feeding
Bucket, which is added in melting furnace, carries out high-temperature fusion smelting；
(4): burning containing dioxin and decomposed under hot environment of the converter fly ash in melting furnace, the part metals after decomposition are to melting furnace
Lower part is mobile, and the product and part metals zinc and lead after decomposed are evaporated from furnace charge, forms coal gas of high temperature；
(5): the stock gas processing unit of melting furnace is designed as cyclone dust collectors and adds the dedusting method of bag filter, and matches
There are secondary combustion chamber and heat exchanger；
(6): the remaining flue gas after bag filter, the coal gas of the high heating value formed after purified dedusting can be used as hot-blast stove
Gaseous fuel, further recycle；
(7): melting furnace lower part obtains the high slag of content of beary metal, can further utilize after treatment；
Further, the step (5) is specially that the high-temperature furnace gas formed in melting furnace is discharged from the exhaust chamber on top first, so
Enter cyclone dust collectors afterwards, the C in furnace gas is separated, obtain the high carbonaceous dust of phosphorus content, such dust returns to conduct
Adding raw materials are recycled；By cyclone dust collectors, treated that furnace gas enters secondary combustion chamber, and furnace gas is in the secondary combustion chamber
After high-temp combustion, dioxin is substantially completely eliminated, and it is cold by furnace gas temperature rapidly to pass through heat exchanger after coming out from secondary combustion chamber
But to 90 DEG C ~ 130 DEG C, the temperature range for being also easy to produce dioxin is quickly crossed, dioxin is inhibited to synthesize again；Then furnace gas enters
Bag filter obtains the higher dust of content of beary metal；
Further, incinerator dioxin flying dust is domestic waste incineration, industrial waste in the step (1) and step (2)
The flying dust containing dioxin of the generations such as incinerator or incinerator for medical garbage；
Further, flux is lime stone, quick lime or silica in the step (1), and the binder is cement.
Beneficial effects of the present invention are as follows:
1): by the way that dioxin to be decomposed to incinerator dust containing dioxin in the high-temperature region of melting furnace delay certain time, remaining
Dioxin in furnace gas is further eliminated in the secondary combustion chamber, and furnace gas temperature is rapidly reduced to 90 through heat exchanger
DEG C ~ 130 DEG C, the temperature range for being also easy to produce dioxin is quickly crossed, dioxin is inhibited to synthesize again；
2): the flying dust containing dioxin and solid waste that various waste incinerators generate can be handled, process range is wide, high production efficiency, tool
There are the economic benefit, environmental benefit and social benefit of highly significant.
Detailed description of the invention
Fig. 1 is the flow chart of process of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is explained in further detail.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, and
It is not used in the restriction present invention.On the contrary, the present invention cover it is any be defined by the claims do on the essence and scope of the present invention
Substitution, modification, equivalent method and scheme.Further, in order to make the public have a better understanding the present invention, below to this
It is detailed to describe some specific detail sections in the datail description of invention.It is thin without these for a person skilled in the art
The present invention can also be understood completely in the description of section part.
The present invention will be further explained below with reference to the attached drawings and specific examples, but not as a limitation of the invention.
Most preferred embodiment is enumerated below for of the invention:
As shown in Figure 1, the present invention, which provides a kind of processing of high-temperature melting method, burns converter fly ash process, the technique containing dioxin
Method passes through disk pelletizing mode system to burn converter fly ash, flux, binder and unclassified stores as raw material containing dioxin after mixing
Agglomerate is made at pelletizing, or by briquetting mode, melting furnace is then added by a certain percentage and carries out high-temperature fusion reduction, two dislike
English is decomposed at high temperature, and the part metals element in flying dust is deposited in melting furnace lower part, and the coal gas of high temperature of formation is through overwinding
Carbonaceous dust is separated in wind dedusting, is recycled, and remaining high-temperature mixed gas is through secondary combustion chamber high-temp combustion
Afterwards, dioxin substantially eliminates, and enters heat exchanger later and carries out the temperature range that chilling quickly crosses generation dioxin, inhibits it
It synthesizes again, then through the further higher dust of isolated content of beary metal of bag filter, melting furnace collective low weight
Slag.Specific technical solution is as follows:
(1) dioxin that contains of addition 30% ~ 70% burns converter fly ash, 0% ~ 25% unclassified stores, 0% ~ 5% flux and 0% when mixing
~ 10% binder, and according to the water for the additive amount supplying 5% ~ 10% for burning converter fly ash containing dioxin；
(2) by raw material after mixing by being stored in after natural curing 72h to roll-in ball machine or vibration ball-pressing machine briquet
Stock ground is spare, or pelletizing is made using disk pelletizing mode；
(3) finished product agglomerate made of dioxin burning converter fly ash will be contained and be transported to furnace top bin according to a certain percentage, by feeding
Bucket, which is added in melting furnace, carries out high-temperature fusion smelting；
(4) it burns containing dioxin and is decomposed under hot environment of the converter fly ash in melting furnace, the part metals after decomposition are to melting furnace
Lower part is mobile, and the product and part metals zinc and lead after decomposed are evaporated from furnace charge, forms coal gas of high temperature；
(5) the stock gas processing unit of melting furnace is designed as cyclone dust collectors and adds the dedusting method of bag filter, and matches
There are secondary combustion chamber and heat exchanger, the high-temperature furnace gas formed in melting furnace is discharged from the exhaust chamber on top first, subsequently into
Cyclone dust collectors separate the C in furnace gas, obtain the high carbonaceous dust of phosphorus content, and such dust returns former as addition
Material is recycled；By cyclone dust collectors treated furnace gas enters secondary combustion chamber, high temperature fires furnace gas in the secondary combustion chamber
After burning, dioxin is substantially completely eliminated, and by heat exchanger furnace gas temperature is cooled to 90 rapidly after coming out from secondary combustion chamber
DEG C ~ 130 DEG C, the temperature range for being also easy to produce dioxin is quickly crossed, dioxin is inhibited to synthesize again；Then furnace gas enters cloth bag and removes
Dirt device obtains the higher dust of content of beary metal；
(6) the remaining flue gas after bag filter, the coal gas of the high heating value formed after purified dedusting can be used as hot-blast stove
Gaseous fuel, further recycle；
(7) melting furnace lower part obtains the high slag of content of beary metal, can further utilize after treatment；
(8) containing dioxin burn converter fly ash make a living waste incinerator, industrial waste incinerator or incinerator for medical garbage living etc. production
Raw burns converter fly ash containing dioxin；Flux is lime stone, quick lime or silica, and binder is cement.
Embodiment one:
A kind of fly ash of municipal incinerator selected is as raw material, and dioxins concentration is in fly ash of municipal incinerator
317ng-TEQ/kg uses quick lime for flux.By burning converter fly ash: additive: quick lime: cement: water is about 71:16:
The ratio of 2:4:7 carries out ingredient, and bulk is made under the pressure higher than 20MPa after mixing, at about 25 DEG C of temperature, humidity
It is lower greater than 80% to conserve 72h.
By after maintenance finished product block and coke be transported to feed bin, then be added in melting furnace by loading hopper, 500 DEG C ~ 700 DEG C
Oxygen-enriched hot air melting furnace is blown by the spray gun in air port, generate 1900 DEG C ~ 2500 DEG C of high temperature with coke gasification reaction, dioxin exists
The residence time is not less than 2s in high temperature section greater than 900 DEG C, and dioxin resolution ratio is not less than 70%, the part huge sum of money after decomposition
Belong to and part dioxin is moved upwards with furnace gas, cyclone dust collectors is entered by furnace roof exhaust chamber, isolated higher degree contains
Carbon dust, furnace gas passes through again is reduced to 90 DEG C ~ 130 DEG C for furnace gas temperature rapidly by heat exchanger after secondary combustion chamber, prevents
Dioxin is formed again in low-temperature range.Furnace gas obtains the higher dust of content of beary metal, two evils using bag filter
The coal gas of English decomposition product dust and high heating value, coal gas are used for the heating of hot-blast stove.
Embodiment two
Selecting a kind of incinerator for medical garbage flying dust, electric stove dust ash is raw material, and dioxin contains in incinerator for medical garbage flying dust
375 ng-TEQ/kg are measured, selection coke powder is reducing agent, uses cement for binder.According to burning converter fly ash: unclassified stores: burnt
Powder: silica: cement: the ratio that water is about 40:30:9:4:5:12 is uniformly mixed, and is made under the pressure higher than 20MPa
Bulk, at about 25 DEG C of temperature, humidity is greater than 80% lower maintenance 72h.
The finished product block for being pressed into block and coke are mixed and are sent into furnace top bin, is then added in melting furnace by loading hopper and carries out height
Warm fusion smelting.Subsequent smelting process is identical as embodiment one.The coal gas of available high heating value, high purity metal dust and
Dioxin decomposition product, and available high-purity heavy metal slag.
Embodiment described above, only one kind of the present invention more preferably specific embodiment, those skilled in the art
The usual variations and alternatives that member carries out within the scope of technical solution of the present invention should be all included within the scope of the present invention.
Claims (5)
1. a kind of high-temperature melting method processing burns converter fly ash process containing dioxin, which is characterized in that the process will
Pelletizing is made by disk pelletizing mode after dioxin burning converter fly ash and additive mixing, or group is made by briquetting mode
Block dioxin flying dust pelletizing or agglomerate is added in melting furnace and carries out high-temperature fusion reduction, and the part metals element in flying dust exists
The coal gas of high temperature of melting furnace lower part deposition, formation separates carbonaceous dust by cyclone dust removal, is recycled, remaining
High-temperature mixed gas after secondary combustion chamber high-temp combustion, dioxin substantially eliminates, later enter heat exchanger carry out chilling
The temperature range for generating dioxin is quickly crossed, it is inhibited to synthesize again, it is then further isolated heavy through bag filter
The higher dust of tenor, melting furnace collective low heavy metal slag.
2. the method according to claim 1, wherein the process the following steps are included:
(1): when mixing add 30% ~ 70% containing dioxin burn converter fly ash, 0% ~ 25% unclassified stores, 0% ~ 5% flux and
0% ~ 10% binder, and according to the water for the additive amount supplying 5% ~ 10% for burning converter fly ash containing dioxin；
(2): by raw material after mixing by being stored after natural curing 72h to roll-in ball machine or vibration ball-pressing machine briquet
It is spare to stock ground, or pelletizing is made using disk pelletizing mode；
(3): finished product agglomerate made of dioxin burning converter fly ash will be contained and be transported to furnace top bin according to a certain percentage, by feeding
Bucket, which is added in melting furnace, carries out high-temperature fusion smelting；
(4): burning containing dioxin and decomposed under hot environment of the converter fly ash in melting furnace, the part metals after decomposition are to melting furnace
Lower part is mobile, and the product and part metals zinc and lead after decomposed are evaporated from furnace charge, forms coal gas of high temperature；
(5): the stock gas processing unit of melting furnace is designed as cyclone dust collectors and adds the dedusting method of bag filter, and matches
There are secondary combustion chamber and heat exchanger；
(6): the remaining flue gas after bag filter, the coal gas of the high heating value formed after purified dedusting can be used as hot-blast stove
Gaseous fuel, further recycle；
(7): melting furnace lower part obtains the high slag of content of beary metal, can further utilize after treatment.
3. process according to claim 2, which is characterized in that the step (5) is specially to be formed in melting furnace
High-temperature furnace gas is discharged from the exhaust chamber on top first, subsequently into cyclone dust collectors, the C in furnace gas is separated, is contained
The high carbonaceous dust of carbon amounts, such dust, which returns, is used as adding raw materials, is recycled；By cyclone dust collectors treated furnace gas
Into secondary combustion chamber, furnace gas in the secondary combustion chamber after high-temp combustion, substantially completely eliminate by dioxin, goes out from secondary combustion chamber
Furnace gas temperature is cooled to 90 DEG C ~ 130 DEG C rapidly by heat exchanger after coming, quickly crosses the humidity province for being also easy to produce dioxin
Between, inhibit dioxin to synthesize again；Then furnace gas enters bag filter, obtains the higher dust of content of beary metal.
4. process according to claim 2, which is characterized in that incinerator two is disliked in the step (1) and step (2)
English flying dust is the flying dust containing dioxin that domestic waste incineration, industrial waste incinerator or incinerator for medical garbage generate.
5. process according to claim 2, which is characterized in that flux is lime stone, quick lime in the step (1)
Or silica, the binder are cement.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810558877.0A CN109000268A (en) | 2018-06-01 | 2018-06-01 | A kind of processing of high-temperature melting method burns converter fly ash process containing dioxin |
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| CN201810558877.0A CN109000268A (en) | 2018-06-01 | 2018-06-01 | A kind of processing of high-temperature melting method burns converter fly ash process containing dioxin |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109652659A (en) * | 2019-01-31 | 2019-04-19 | 龙岩山青冶金科技有限公司 | Manganese-silicon mine heat furnace smelting collaboration processing incineration of refuse flyash system and method |
| CN110328221A (en) * | 2019-08-19 | 2019-10-15 | 王玉海 | A kind of incineration of refuse flyash mineralization treatment method |
| CN110594755A (en) * | 2019-08-22 | 2019-12-20 | 徐晓 | Fly ash melting system for waste incineration plant based on pure oxygen combustion |
| CN110953595A (en) * | 2019-11-13 | 2020-04-03 | 亿利洁能股份有限公司达拉特分公司 | Clean utilization system of carbide stove waste material incineration used heat |
| CN110982576A (en) * | 2019-11-19 | 2020-04-10 | 李洪 | Fly ash treatment method of compatible RDF and intermediate product thereof |
| CN111589843A (en) * | 2020-05-29 | 2020-08-28 | 浙江华环环境有限公司 | Additive for high-temperature melting gasification of waste incineration fly ash and treatment method |
| CN112414132A (en) * | 2020-11-16 | 2021-02-26 | 西安航天源动力工程有限公司 | Method and system for resourceful treatment of waste incineration fly ash |
| CN112792091A (en) * | 2020-12-15 | 2021-05-14 | 西安交通大学 | Harmless treatment system and method for resource utilization of garbage fly ash |
| CN113020229A (en) * | 2021-05-27 | 2021-06-25 | 中国恩菲工程技术有限公司 | Fly ash sulfur fixation melting harmless treatment method |
| CN113280345A (en) * | 2021-06-25 | 2021-08-20 | 中国科学院山西煤炭化学研究所 | Method for generating electricity by coupling high-temperature melting and harmless treatment of waste fly ash with incineration |
| CN117732831A (en) * | 2024-02-06 | 2024-03-22 | 华衍环保产业有限公司甘肃分公司 | Compatible additive for inhibiting volatilization of chloride salt in fly ash sintering process and fly ash treatment method |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109652659A (en) * | 2019-01-31 | 2019-04-19 | 龙岩山青冶金科技有限公司 | Manganese-silicon mine heat furnace smelting collaboration processing incineration of refuse flyash system and method |
| CN110328221A (en) * | 2019-08-19 | 2019-10-15 | 王玉海 | A kind of incineration of refuse flyash mineralization treatment method |
| CN110594755A (en) * | 2019-08-22 | 2019-12-20 | 徐晓 | Fly ash melting system for waste incineration plant based on pure oxygen combustion |
| CN110953595A (en) * | 2019-11-13 | 2020-04-03 | 亿利洁能股份有限公司达拉特分公司 | Clean utilization system of carbide stove waste material incineration used heat |
| CN110982576A (en) * | 2019-11-19 | 2020-04-10 | 李洪 | Fly ash treatment method of compatible RDF and intermediate product thereof |
| CN111589843A (en) * | 2020-05-29 | 2020-08-28 | 浙江华环环境有限公司 | Additive for high-temperature melting gasification of waste incineration fly ash and treatment method |
| CN112414132A (en) * | 2020-11-16 | 2021-02-26 | 西安航天源动力工程有限公司 | Method and system for resourceful treatment of waste incineration fly ash |
| CN112792091A (en) * | 2020-12-15 | 2021-05-14 | 西安交通大学 | Harmless treatment system and method for resource utilization of garbage fly ash |
| CN113020229A (en) * | 2021-05-27 | 2021-06-25 | 中国恩菲工程技术有限公司 | Fly ash sulfur fixation melting harmless treatment method |
| CN113280345A (en) * | 2021-06-25 | 2021-08-20 | 中国科学院山西煤炭化学研究所 | Method for generating electricity by coupling high-temperature melting and harmless treatment of waste fly ash with incineration |
| CN117732831A (en) * | 2024-02-06 | 2024-03-22 | 华衍环保产业有限公司甘肃分公司 | Compatible additive for inhibiting volatilization of chloride salt in fly ash sintering process and fly ash treatment method |
| CN117732831B (en) * | 2024-02-06 | 2024-05-07 | 华衍环保产业有限公司甘肃分公司 | Compatible additive for inhibiting volatilization of chloride salt in fly ash sintering process and fly ash treatment method |
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