摘要
从一次机五段后冷器分程隔板的宏观断口形貌、后冷器出入口管道振动频谱图和工艺等三方面进行分析,找出导致该换热器分程隔板失效的根本原因是往复式压缩机介质的脉动应力引起隔板疲劳断裂,同时下游装置的紧急放空和介质中带液加速了分程隔板的失效。针对失效原因,提出了在分程隔板设置平衡孔和加强筋以及采用全焊透的结构形式等措施,对此问题进行了彻底解决。自2008年10月投用了改造后的新管束,该换热器平稳运行至今,未发生类似的失效事故。
Through analyzing the macroscopic fracture morphology of the pass partition plateof the fifth-section after-cooler,the vibration spectrum of the inlet pipelines of the after-cooler and the process,the root causes for the failure of the pass partition plate of the heat exchanger are found out:the pulsating stress of the reciprocating compressor medium results in the fatigue fracture of the partition plate;meanwhile,the emergency blow-down of the downstream unit and entrained liquid in the medium accelerate the failure.Aiming at the failure causes,corresponding measures such as setting balancing holes and reinforcing ribs on the pass partition plate and taking full penetration weld joint structure are taken to solve the problem completely.The heat exchanger has run smoothly and similar failures haven't occurred since the operation of the revamped new bundle in October,2008.
出处
《石油化工设备技术》
CAS
2015年第6期47-49,7,共3页
Petrochemical Equipment Technology
关键词
一次机
五段后冷器
失效分析
分程隔板
断口
疲劳断裂
Primary compressor
Fifth-section after-cooler
Failure analysis
Pass partition plate
Fracture
Fatigue fracture
作者简介
程剑锋，男，1996年毕业于西安石油学院焊接工艺与设备专业，学士．2003年取得华东理工大学工程硕士学位，负责全厂可靠性工作，已发表论文3篇，现任中海壳牌工程服务部可靠性主任，工程师。Email：j.f．cheng@163．com。
