对多起乙烯裂解炉HP型炉管失效原因的分析总结  

Failure Analysis for Several Accidents of HP Type Ethylene Pyrolyzing Tubes

作　　者：耿鲁阳[1] 巩建鸣[1] 姜勇[1] 

机构地区：[1]南京工业大学机械与动力工程学院,江苏南京210009

出　　处：《压力容器》2011年第12期48-53,共6页Pressure Vessel Technology

摘　　要：裂解炉炉管是乙烯生产装置关键设备乙烯裂解炉的核心部件,承受高温复杂环境所引起的各种损伤。某大型石化企业在近年连续发生数起因HP型(Cr25Ni35和Cr35Ni45)炉管失效引起的裂解炉故障,影响了乙烯装置的安全、长周期运行。采用金相分析、扫描电镜、能谱分析等多种手段,对这几起故障的表现特点和失效原因进行了分析。分析结果表明,炉管在高温下长期运行造成的渗碳、蠕变等损伤以及高温硫腐蚀是造成这几起HP型炉管失效的主要原因。The pyrolyzing tube is one of the most important components of an ethylene pyrolyzing furnace,the key equipment of ethylene production in the petrochemical industry,and endures different kinds of damage caused by complicated high temperature environment.In recent years,several failure accidents of HP type cracking furnace tubes happened in a large petrochemical plant,which interrupted the long-term safe operation of the ethylene production.The characteristics and reasons of these failures are analyzed by the methods of metallographic analysis,scanning electron microscope（SEM） and energy dispersive spectrometer（EDS）.The results of analysis indicate that these failures were caused by carburization,creep and sulphuric corrosion brought by high temperature.

关 键 词：乙烯裂解炉 HP型炉管材料 失效分析 

分 类 号：TH704[机械工程—仪器科学与技术] TQ052.6[机械工程—精密仪器及机械]