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Method for low-temperature pyrolysis and resource utilization of household garbage incineration fly ash
The invention discloses a household garbage incineration fly ash low-temperature pyrolysis and resource utilization method, which comprises the steps: unloading fly ash from a storage tank, feeding into a pyrolysis furnace, and carrying out low-temperature pyrolysis; discharging from the pyrolysis furnace, detecting the total residual amount of dioxins in the fly ash pyrolyzing product, feeding the fly ash pyrolyzing product with the total residual amount exceeding 50 ng-TEQ/kg back to the pyrolyzing furnace, continuously pyrolyzing, and preparing the qualified fly ash pyrolyzing product withthe total residual amount not exceeding 50ng-TEQ/kg into a mine filler, wherein the mine filler is prepared by stirring a cementing agent, aggregate, water and an additive, and the cementing agent isprepared by homogenizing a qualified fly ash pyrolysis product, slag, slag and industrial byproduct gypsum; and sequentially feeding the flue gas generated in the pyrolysis furnace into a secondary combustion chamber, a waste heat recovery system, a deacidification system and a dust removal system, and discharging until atmospheric pollutants in the flue gas meet the national emission standard. According to the method, resource utilization of the fly ash is achieved, the absorption capacity is high, the cost is low, and environmental safety is guaranteed.
本发明公开了一种生活垃圾焚烧飞灰低温热解及资源化利用的方法，包括：将飞灰从储罐中卸除后送至热解炉中低温热解；然后从热解炉中排出，检测飞灰热解产物的二噁英类的残留总量，将残留总量超过50ng‑TEQ/kg的飞灰热解产物送回热解炉中继续热解，将残留总量不超过50ng‑TEQ/kg的合格飞灰热解产物制成矿山填充料；矿山填充料由胶结剂、骨料、水和外加剂搅拌制得，胶结剂包括合格飞灰热解产物、矿渣、炉渣和工业副产石膏均化制得；热解炉中产生的烟气依次进入二燃室、余热回收系统、脱酸系统和除尘系统，直至烟气中的大气污染物符合国家排放标准后排放。本发明实现了飞灰资源化利用，消纳能力强，成本低，保证环境安全。
Method for low-temperature pyrolysis and resource utilization of household garbage incineration fly ash
The invention discloses a household garbage incineration fly ash low-temperature pyrolysis and resource utilization method, which comprises the steps: unloading fly ash from a storage tank, feeding into a pyrolysis furnace, and carrying out low-temperature pyrolysis; discharging from the pyrolysis furnace, detecting the total residual amount of dioxins in the fly ash pyrolyzing product, feeding the fly ash pyrolyzing product with the total residual amount exceeding 50 ng-TEQ/kg back to the pyrolyzing furnace, continuously pyrolyzing, and preparing the qualified fly ash pyrolyzing product withthe total residual amount not exceeding 50ng-TEQ/kg into a mine filler, wherein the mine filler is prepared by stirring a cementing agent, aggregate, water and an additive, and the cementing agent isprepared by homogenizing a qualified fly ash pyrolysis product, slag, slag and industrial byproduct gypsum; and sequentially feeding the flue gas generated in the pyrolysis furnace into a secondary combustion chamber, a waste heat recovery system, a deacidification system and a dust removal system, and discharging until atmospheric pollutants in the flue gas meet the national emission standard. According to the method, resource utilization of the fly ash is achieved, the absorption capacity is high, the cost is low, and environmental safety is guaranteed.
本发明公开了一种生活垃圾焚烧飞灰低温热解及资源化利用的方法，包括：将飞灰从储罐中卸除后送至热解炉中低温热解；然后从热解炉中排出，检测飞灰热解产物的二噁英类的残留总量，将残留总量超过50ng‑TEQ/kg的飞灰热解产物送回热解炉中继续热解，将残留总量不超过50ng‑TEQ/kg的合格飞灰热解产物制成矿山填充料；矿山填充料由胶结剂、骨料、水和外加剂搅拌制得，胶结剂包括合格飞灰热解产物、矿渣、炉渣和工业副产石膏均化制得；热解炉中产生的烟气依次进入二燃室、余热回收系统、脱酸系统和除尘系统，直至烟气中的大气污染物符合国家排放标准后排放。本发明实现了飞灰资源化利用，消纳能力强，成本低，保证环境安全。
Method for low-temperature pyrolysis and resource utilization of household garbage incineration fly ash
一种生活垃圾焚烧飞灰低温热解及资源化利用的方法
ZHANG NING (author)
2020-11-17
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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