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Method for melting, chlorinating, roasting and recycling hazardous waste incineration residues
The invention discloses a method for melting, chlorinating, roasting and recycling hazardous waste incineration residues. The method comprises the following steps: mixing and grinding residues after hazardous waste incineration and fly ash, and carrying out magnetic separation to separate metal simple substance particles; performing solid-liquid separation, uniformly mixing the solid with a chlorinating agent, a reducing agent and a fluxing agent; warp pressure modeling, raising the temperature of the section bar to 800-1300 DEG C for chloridizing, roasting and volatilizing, stabilizing the temperature at 1300-1500 DEG C for melt chlorination volatilization treatment; wherein the melting chlorination volatilization time is 30 to 120 minutes; heating the volatilized flue gas to the temperature of 1100 to 1200 DEG C; decomposing dioxin in the flue gas, quickly cooling to below 200 DEG C, collecting smoke dust by using a dust remover, carrying out spray washing on the flue gas subjected to dust removal by using alkali liquor, precipitating and filtering spray liquid, carrying out water quenching or air quenching treatment on molten tailings to obtain vitreous particles, and recyclingthe vitreous particles. According to the method, the defect that hazardous waste incineration residues are subjected to landfill disposal at present is overcome, and land resource waste and secondaryenvironmental pollution risks are reduced.
一种危废焚烧残余物熔融氯化焙烧资源化利用的方法：将危废焚烧后的残渣和飞灰混合磨细、磁选分离出金属单质颗粒，再进行固液分离，将固体与氯化剂、还原剂和助熔剂混合均匀，经压力造型，将型材升温至800‑1300℃进行氯化焙烧挥发，最后将温度稳定在1300‑1500℃进行熔融氯化挥发处置，熔融氯化挥发时长为30‑120min，将挥发出的烟气再升温至1100‑1200℃，分解其中的二噁英，然后快速降温至200℃以下，经除尘器收集烟尘，再用碱液对除尘后的烟气进行喷淋洗涤，将喷淋液沉淀过滤，烟尘和滤饼中即含有有价金属氯化物，将熔融后的尾渣水淬或风淬处理，得玻璃状颗粒资源化利用。本发明解决了目前危废焚烧残余物采用填埋处置的弊端，减少了土地资源浪费和二次环境污染风险。
Method for melting, chlorinating, roasting and recycling hazardous waste incineration residues
The invention discloses a method for melting, chlorinating, roasting and recycling hazardous waste incineration residues. The method comprises the following steps: mixing and grinding residues after hazardous waste incineration and fly ash, and carrying out magnetic separation to separate metal simple substance particles; performing solid-liquid separation, uniformly mixing the solid with a chlorinating agent, a reducing agent and a fluxing agent; warp pressure modeling, raising the temperature of the section bar to 800-1300 DEG C for chloridizing, roasting and volatilizing, stabilizing the temperature at 1300-1500 DEG C for melt chlorination volatilization treatment; wherein the melting chlorination volatilization time is 30 to 120 minutes; heating the volatilized flue gas to the temperature of 1100 to 1200 DEG C; decomposing dioxin in the flue gas, quickly cooling to below 200 DEG C, collecting smoke dust by using a dust remover, carrying out spray washing on the flue gas subjected to dust removal by using alkali liquor, precipitating and filtering spray liquid, carrying out water quenching or air quenching treatment on molten tailings to obtain vitreous particles, and recyclingthe vitreous particles. According to the method, the defect that hazardous waste incineration residues are subjected to landfill disposal at present is overcome, and land resource waste and secondaryenvironmental pollution risks are reduced.
一种危废焚烧残余物熔融氯化焙烧资源化利用的方法：将危废焚烧后的残渣和飞灰混合磨细、磁选分离出金属单质颗粒，再进行固液分离，将固体与氯化剂、还原剂和助熔剂混合均匀，经压力造型，将型材升温至800‑1300℃进行氯化焙烧挥发，最后将温度稳定在1300‑1500℃进行熔融氯化挥发处置，熔融氯化挥发时长为30‑120min，将挥发出的烟气再升温至1100‑1200℃，分解其中的二噁英，然后快速降温至200℃以下，经除尘器收集烟尘，再用碱液对除尘后的烟气进行喷淋洗涤，将喷淋液沉淀过滤，烟尘和滤饼中即含有有价金属氯化物，将熔融后的尾渣水淬或风淬处理，得玻璃状颗粒资源化利用。本发明解决了目前危废焚烧残余物采用填埋处置的弊端，减少了土地资源浪费和二次环境污染风险。
Method for melting, chlorinating, roasting and recycling hazardous waste incineration residues
一种危废焚烧残余物熔融氯化焙烧资源化利用的方法
ZHU XINGANG (author) / HU ZUNBIN (author) / ZHU MINGHONG (author)
2020-08-04
Patent
Electronic Resource
Chinese
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