危废焚烧系统设备腐蚀的原因探讨

焚烧设备腐蚀是目前制约危险废物焚烧系统长期稳定运行的主要因素之一。采用扫描电镜对危险废物焚烧系统不同部位结焦物进行扫描,并用能谱分析仪分析了不同部位结焦产物的主要元素组成,在此基础上,分析了不同部位的结焦产物的成因。结果表明:回转窑窑尾处结焦存在的主要氧化性元素为O,F和P,结焦产物的组成以Ca,Sb和Fe的化合物居多,二燃室出口灰渣中氧化性元素以S和O居多,结焦产物以硫的盐类化合物为主,两者存在较大差异。研究结论可为对焚烧系统不同部位采取不同的腐蚀防治措施提供参考。

Corrosion of incineration equipment is a significant factor that hinders the long-term stable operation of hazardous waste incineration systems.This study utilizes scanning electron microscopy to examine coke in various sections of the hazardous waste incineration system and employs an energy spectrum analyzer to analyze the main components of coke in these sections.Based on this analysis,the causes of coking products in different parts are investigated.The findings reveal that O,F,and P are the primary oxidizing elements,while Ca,Sb,and Fe compounds are the main constituents contributing to coking at the end of the kiln.In contrast,sulfur(S)and oxygen(O)dominate as oxidizing elements in ash residue at the exit of the secondary combustion chamber,resulting primarily in sulfur salt compounds during coking.There are obvious differences between the two sections,which can provide valuable insights for implementing corrosion prevention measures across different sections within an incineration system.