CN102772978A - Method for treating flying ash - Google Patents
Method for treating flying ash Download PDFInfo
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- CN102772978A CN102772978A CN2012102333560A CN201210233356A CN102772978A CN 102772978 A CN102772978 A CN 102772978A CN 2012102333560 A CN2012102333560 A CN 2012102333560A CN 201210233356 A CN201210233356 A CN 201210233356A CN 102772978 A CN102772978 A CN 102772978A
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Abstract
The invention discloses a method for treating flying ash. The method comprises the following steps of: collecting dust from a garbage incinerator flue of a garbage incineration power plant; putting the dust into an air-insulated vacuum enclosed heating device or an enclosed device with a protective atmosphere for fully heating; making waste gas generated in the heating device pass through a pipeline; and returning into a power plant boiler. Due to the adoption of the treatment method, the dioxin-like substance content of flying ash can be greatly lowered, and damages of dioxin-like substances to the environment and human bodies are greatly lowered.
Description
Technical field
The present invention relates to a kind of flyash treatment method.
Background technology
Continuous quickening along with industrialization and urbanization process; Population sharply expands, and the three wastes that directly cause producing in the city are on the increase, and the news item that has impulsive force recently is: on December 4th, 2011; The quick-fried once more table of Beijing PM2.5 Monitoring Data of American Embassy in China's issue; Index is 522, has surpassed high pollution index 500, and Beijing becomes genuine " mist all ".It is thus clear that the pollution in the big city is quite serious, as the other rubbish that produces in the city: like house refuse; Its processing method normally is sent to garbage incinerating power plant; But, in the process of waste incineration and generating electricity, can produce a large amount of carcinogenic substance dioxins materials (Dioxin); Dust in the refuse furnace flue of garbage incinerating power plant is the danger wastes of national regulation; Danger wastes refers to be listed national danger wastes register in or according to the solid waste with hazard property of the hazardous waste discrimination method identification of national regulation, contains a large amount of De dioxins materials ， dioxins materials in the dust in the refuse furnace flue of garbage incinerating power plant and have excellent stability; Natural even microorganism almost can be ignored to its influence; And its toxicity is huge, and has fat-solublely preferably, and it can finally get into human body through a series of food chain approach; Thereby bring human harm greatly, in human one-level carcinogenic substance is listed it by IARC.
These dust of good treatment (being flying dust) not contain a large amount of dioxins materials in the dust in the flue of incinerator, if will bring great injury to environment and human body.
Summary of the invention
The purpose of this invention is to provide a kind of flyash treatment method.
The technical scheme that the present invention taked is:
A kind of flyash treatment method; May further comprise the steps: from the incinerator flue of garbage incinerating power plant, collect dust; Dust is placed the vacuum tightness heater or adds the obturator of protective atmosphere; Carry out abundant heat treated, the waste gas that produces in the heater passes through pipeline, logical postbacking in the boiler of power plant.
In the described vacuum tightness heater, vacuum is≤15% standard atmospheric pressure.
Described protective atmosphere is at least a in nitrogen, helium, neon, argon gas, krypton gas, the xenon.
In the described airtight heater that adds protective atmosphere, the gas concentration beyond the protective atmosphere is 15vol%-10ppm.
Described airtight heater is a kind of in airtight rotary furnace, Muffle furnace, batch-type furnace, tube furnace, bell jar stove, meshbeltfurnace, well formula resistance furnace, electromagnetic oven, the micro-wave oven.
The temperature of heat treated is >=120 ℃.
Time >=the 30s of heat treated.
The invention has the beneficial effects as follows: processing method of the present invention can reduce De dioxins materials content in the flying dust greatly, thereby reduces the harm that dioxins materials brings for environment and human body greatly.Heat treated temperature of the present invention is more than 120 ℃, and the heat treated time is more than the 30s, and in the accessible maximum temperature scope of airtight heater, heating-up temperature is high more, and corresponding effects is good more, and the heat treated time is long more, and corresponding effects is good more.
The specific embodiment
Below in conjunction with specific embodiment the present invention is done further explanation:
Embodiment 1:
From the incinerator flue of garbage incinerating power plant, collect dust, dust is placed airtight rotary furnace (production of Xianyang blue light thermal technology Science and Technology Ltd.), feed protective gas N in the stove
2, N
2Content is controlled at 99vol%, and the temperature of stove heating is controlled at 400 ℃, processing time 60min, and the waste gas that produces in the rotary furnace sends back in the power plant boiler through pipeline.
Through test, before the processing, De dioxin toxic equivalent concentration is 525ng TEQ/kg in the dust, and De dioxin toxic equivalent concentration is 0.71ng TEQ/kg in the dust after the heat treated.
Embodiment 2:
From the incinerator flue of garbage incinerating power plant, collect dust, dust is placed airtight rotary furnace (production of Xianyang blue light thermal technology Science and Technology Ltd.), feed protective gas N in the stove
2, N
2Content is controlled at 98vol%, and the temperature of stove heating is controlled at 400 ℃, processing time 60min, and the waste gas that produces in the rotary furnace sends back in the power plant boiler through pipeline.
Through test, before the processing, De dioxin toxic equivalent concentration is 390ng TEQ/kg in the dust, and De dioxin toxic equivalent concentration is 4.75ng TEQ/kg in the dust after the heat treated.
Embodiment 3:
From the incinerator flue of garbage incinerating power plant, collect dust, dust is placed airtight rotary furnace (production of Xianyang blue light thermal technology Science and Technology Ltd.), feed protective gas N in the stove
2, N
2Gas content in addition is controlled at 10ppm (volumetric concentration), and the temperature of stove heating is controlled at 400 ℃, processing time 30min, and the waste gas that produces in the rotary furnace sends back in the power plant boiler through pipeline.
Through test, before the processing, De dioxin toxic equivalent concentration is 392ng TEQ/kg in the dust, and De dioxin toxic equivalent concentration is 8.42ng TEQ/kg in the dust after the heat treated.
Embodiment 4:
From the incinerator flue of garbage incinerating power plant, collect dust; Dust is placed airtight rotary furnace (production of Xianyang blue light thermal technology Science and Technology Ltd.), feed the protective gas argon gas in the stove, argon content is controlled at 99.99vol%; The temperature of stove heating is controlled at 350 ℃; Processing time 40min, the waste gas that produces in the rotary furnace sends back in the power plant boiler through pipeline.
Through test, before the processing, De dioxin toxic equivalent concentration is 418ng TEQ/kg in the dust, and De dioxin toxic equivalent concentration is 5.12ng TEQ/kg in the dust after the heat treated.
Embodiment 5:
From the incinerator flue of garbage incinerating power plant, collect dust; Dust is placed airtight rotary furnace (production of Xianyang blue light thermal technology Science and Technology Ltd.), feed the protective gas helium in the stove, helium content is controlled at 99.999vol%; The temperature of stove heating is controlled at 380 ℃; Processing time 60min, the waste gas that produces in the rotary furnace sends back in the power plant boiler through pipeline.
Through test, before the processing, De dioxin toxic equivalent concentration is 469ng TEQ/kg in the dust, and De dioxin toxic equivalent concentration is 8.99ng TEQ/kg in the dust after the heat treated.
Embodiment 6:
From the incinerator flue of garbage incinerating power plant, collect dust, dust is placed airtight rotary furnace (production of Xianyang blue light thermal technology Science and Technology Ltd.), feed protective gas N in the stove
2, N
2Content is controlled at 85vol%, and the temperature of stove heating is controlled at 375 ℃, processing time 45min, and the waste gas that produces in the rotary furnace sends back in the power plant boiler through pipeline.
Through test, before the processing, De dioxin toxic equivalent concentration is 532ng TEQ/kg in the dust, and De dioxin toxic equivalent concentration is 9.12ng TEQ/kg in the dust after the heat treated.
Embodiment 7:
From the incinerator flue of garbage incinerating power plant, collect dust, it is 10 that dust is placed vacuum
-2In the airtight rotary furnace of Pa (production of Xianyang blue light thermal technology Science and Technology Ltd.), the temperature of stove heating is controlled at 120 ℃, processing time 5h, and the waste gas that produces in the rotary furnace sends back in the power plant boiler through pipeline.
Through test, before the processing, De dioxin toxic equivalent concentration is 517ng TEQ/kg in the dust, and De dioxin toxic equivalent concentration is 6.32ng TEQ/kg in the dust after the heat treated.
Embodiment 8:
From the incinerator flue of garbage incinerating power plant, collect dust, it is 5 * 10 that dust is placed vacuum
-3In the airtight rotary furnace of Pa (production of Xianyang blue light thermal technology Science and Technology Ltd.), the temperature of stove heating is controlled at 120 ℃, processing time 5h, and the waste gas that produces in the rotary furnace sends back in the power plant boiler through pipeline.
Through test, before the processing, De dioxin toxic equivalent concentration is 630ng TEQ/kg in the dust, and De dioxin toxic equivalent concentration is 5.59ng TEQ/kg in the dust after the heat treated.
Embodiment 9:
From the incinerator flue of garbage incinerating power plant, collect dust; It is the airtight rotary furnace (production of Xianyang blue light thermal technology Science and Technology Ltd.) of 15% standard atmospheric pressure that dust is placed air pressure; The temperature of stove heating is controlled at 1200 ℃; Processing time 24h, the waste gas that produces in the rotary furnace sends back in the power plant boiler through pipeline.
Through test, before the processing, De dioxin toxic equivalent concentration is 510ng TEQ/kg in the dust, and De dioxin toxic equivalent concentration is 5.13ng TEQ/kg in the dust after the heat treated.
Claims (7)
1. flyash treatment method; It is characterized in that: may further comprise the steps: from the incinerator flue of garbage incinerating power plant, collect dust; Dust is placed the vacuum tightness heater or adds the airtight heater of protective atmosphere; Carry out abundant heat treated, the waste gas that produces in the heater passes through pipeline, logical postbacking in the boiler of power plant.
2. a kind of flyash treatment method according to claim 1 is characterized in that: in the described vacuum tightness heater, vacuum is≤15% standard atmospheric pressure.
3. a kind of flyash treatment method according to claim 1 is characterized in that: described protective atmosphere is at least a in nitrogen, helium, neon, argon gas, krypton gas, the xenon.
4. a kind of flyash treatment method according to claim 1 is characterized in that: in the described airtight heater that adds protective atmosphere, the gas concentration beyond the protective atmosphere is 15vol%-10ppm.
5. a kind of flyash treatment method according to claim 1 is characterized in that: described airtight heater is a kind of in airtight rotary furnace, Muffle furnace, batch-type furnace, tube furnace, bell jar stove, meshbeltfurnace, well formula resistance furnace, electromagnetic oven, the micro-wave oven.
6. a kind of flyash treatment method according to claim 1 is characterized in that: the temperature of heat treated is >=120 ℃.
7. a kind of flyash treatment method according to claim 1 is characterized in that: the time >=30s of heat treated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102333560A CN102772978A (en) | 2012-07-06 | 2012-07-06 | Method for treating flying ash |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102333560A CN102772978A (en) | 2012-07-06 | 2012-07-06 | Method for treating flying ash |
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| CN102772978A true CN102772978A (en) | 2012-11-14 |
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| CN2012102333560A Pending CN102772978A (en) | 2012-07-06 | 2012-07-06 | Method for treating flying ash |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974068A (en) * | 2012-11-22 | 2013-03-20 | 深圳市能源环保有限公司 | Waste incineration fly ash treatment agent |
| CN103042022A (en) * | 2012-12-05 | 2013-04-17 | 广东德诚环保科技有限公司 | Fly ash processing method |
| CN106077031A (en) * | 2016-06-22 | 2016-11-09 | 浙江大学 | A kind of method of disposal that microwave-hydrothermal method is applied to domestic garbage incineration flyash |
| US9744393B1 (en) | 2016-12-18 | 2017-08-29 | Guangdong Decheng Environmental Sci-Tech Co., Ltd. | Method of removing toxins from fly ash |
| CN108380640A (en) * | 2018-02-12 | 2018-08-10 | 江苏天楹环保能源成套设备有限公司 | A kind of method of vacuum microwave carbon thermal reduction processing flying dust |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050862A (en) * | 2007-05-17 | 2007-10-10 | 同济大学 | Hydrothermal processing method for garbage burning flyash |
-
2012
- 2012-07-06 CN CN2012102333560A patent/CN102772978A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101050862A (en) * | 2007-05-17 | 2007-10-10 | 同济大学 | Hydrothermal processing method for garbage burning flyash |
Non-Patent Citations (2)
| Title |
|---|
| YOUHEI MISAKA ET AL.: "Removal of PCDDs/DFs and dl-PCBs in MWI fly ash by heating under vacuum", 《CHEMOSPHERE》 * |
| 严建华等: "垃圾焚烧炉飞灰中二噁英的低温热处理试验研究", 《中国电机工程学报》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974068A (en) * | 2012-11-22 | 2013-03-20 | 深圳市能源环保有限公司 | Waste incineration fly ash treatment agent |
| WO2014079221A1 (en) * | 2012-11-22 | 2014-05-30 | 深圳市能源环保有限公司 | Reagent for processing fly ash whilst incinerating waste |
| CN102974068B (en) * | 2012-11-22 | 2015-12-23 | 深圳市能源环保有限公司 | Waste incineration fly ash treatment agent |
| CN103042022A (en) * | 2012-12-05 | 2013-04-17 | 广东德诚环保科技有限公司 | Fly ash processing method |
| CN103042022B (en) * | 2012-12-05 | 2015-11-25 | 广东德诚环保科技有限公司 | A kind of flyash treatment method |
| CN106077031A (en) * | 2016-06-22 | 2016-11-09 | 浙江大学 | A kind of method of disposal that microwave-hydrothermal method is applied to domestic garbage incineration flyash |
| US9744393B1 (en) | 2016-12-18 | 2017-08-29 | Guangdong Decheng Environmental Sci-Tech Co., Ltd. | Method of removing toxins from fly ash |
| EP3335810A1 (en) | 2016-12-18 | 2018-06-20 | Guangdong Decheng Environmental Sci-Tech Co. Ltd | Method of removing toxins from fly ash |
| CN108380640A (en) * | 2018-02-12 | 2018-08-10 | 江苏天楹环保能源成套设备有限公司 | A kind of method of vacuum microwave carbon thermal reduction processing flying dust |
| CN108380640B (en) * | 2018-02-12 | 2020-04-07 | 江苏天楹环保能源成套设备有限公司 | Method for treating fly ash by vacuum microwave carbothermic reduction |
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Application publication date: 20121114 |