摘要
为降低回转窑焚烧处理高盐危险废物时出现结渣结焦的风险,文章采用扫描电镜分析、能谱分析和X射线衍射等技术对回转窑焚烧渣的成分和结焦特性进行研究。研究结果表明,焚烧渣中主要含有24.2%的Na、30.8%的Si和13.7%的Al,NaF为焚烧渣的主要物相;扫描电镜技术分析结果表明,回转窑焚烧渣的表面分布着呈结晶态但形状不规则的细小颗粒,且这些颗粒表现出显著的粘结特性。焚烧渣中含有41.3%的Na_(2)O和14.5%的CaO等碱性氧化物,导致高盐危险废物在低于回转窑正常运行温度条件下开始熔融,并形成具有非晶体-玻璃体结构的黏性熔体,黏性熔体粘附灰渣而成为回转窑窑尾的结渣结焦产物。
To reduce the risk of slagging and coking problem during the operating period of high-salt hazardous waste incineration system with rotary kiln,technologies such as scanning electron microscopy analysis(SEM),energy-dispersive spectroscopy analysis(EDS),and X-ray diffraction analysis(XRD)were used to research the composition and slagging characteristics of the hazardous waste incineration residue in rotary kiln.The results show that the incineration residue mainly contains 24.2%Na,30.8%Si and 13.7%Al,the main components of chemical phase analysis for incineration residue are NaF.The analysis results of SEM show that the incineration residue surface of rotary kiln is distributed with fine particles in crystalline states but irregular in shapes,and these particles exhibit significant bonding characteristics.The chemical composition of incineration residue is complex and diverse,mainly containing 41.3%Na_(2)O and 14.5%CaO,which leads to the high-salt hazardous waste has a lower melting temperature than normal operating conditions of rotary kiln,and forms a viscous molten product with amorphous-vitreous structure,it will adhere to the clinker and become a slagging-coking product in tail section of rotary kiln.
作者
罗根华
刘玉东
周田佑
邹晶晶
LUO Genhua;LIU Yudong;ZHOU Tianyou;ZOU Jingjing(Bijie Vocational and Technical College,Bijie 551700,China;College of Environmental Science and Engineering,Liaoning Technical University,Fuxin 123000,China;Fuxin Huanfa Hazardous Waste Disposal Co.,Ltd.,Fuxin 123000,China)
出处
《化工管理》
2025年第34期139-143,共5页
Chemical Management
关键词
高盐危险废物
焚烧渣
回转窑
结焦特性
high-salt hazardous waste
incineration residue
rotary kiln
slagging characteristic
