摘要
针对四川石化芳烃抽提装置溶剂再生塔E-1013换热器管束发生两次开裂、泄漏问题,对该管束的化学成分及显微组织进行分析,通过电镜扫描及能谱分析,结合换热器运行工况和管束材质结构,对管束开裂的主要原因进行分析。结果表明:管束与管板的焊接处存在局部应力集中,在振动交变载荷作用下,管束发生疲劳开裂。通过控制再生塔操作温度、换热器管束进/出口温度及选用304以上牌号的奥氏体不锈钢等措施,可有效控制管束的疲劳开裂事故。
In response to the problem of two cracks and leaks in a heat exchanger bundle of a solvent regeneration tower E-1013 in the aromatics extraction unit of Sichuan Petrochemical,the chemical composition and microstructure of the bundle were analyzed.Through electron microscopy scanning and energy spectrum analysis,combined with the operating conditions of the heat exchanger and the material structure of the bundle,the main reasons for the cracking of the bundle were analyzed.The results indicate that there was localized stress concentration at the welding point between the tube bundle and the tube plate,and fatigue cracking occurs in the tube bundle under the action of alternating vibration loads.By controlling the operating temperature of the regeneration tower,the inlet and outlet temperature of the heat exchanger tube bundle,and selecting austenitic stainless steel above 304,fatigue cracking accidents of the tube bundle could be effectively controlled.
作者
黄飞虎
高涵
张杰
王科林
HUANG Feihu;GAO Han;ZHANG Jie;WANG Kelin(Petrochina Sichuan Petrochemical Company,Chengdu 611930,China;Shenyang ZKwell Corrosion Control Technology Co.,Ltd.,Shenyang 110180,China)
出处
《腐蚀与防护》
CAS
CSCD
北大核心
2024年第4期115-118,共4页
Corrosion & Protection
关键词
溶剂再生塔
换热管束
应力集中
振动
疲劳开裂
solvent regeneration tower
heat exchanger tube bundle
stress concentration
vibration
fatigue cracking
