摘要
神华宁煤烯烃分公司循环流化床锅炉下渣管多次发生断裂,严重影响装置安全生产运行。现场勘察后分析认为,下渣管断裂的主要原因是管线长期处于800℃高温环境,由于膨胀节、钢管制造等选型不当,在热应力作用下发生疲劳断裂。采取将下渣管材质从316不锈钢铸造管升级为310S不锈钢热轧管、重新对膨胀节选型及改造下渣管结构等辅助措施,确保了装置运行的可靠性。
The slag pipe of the circulating fluidized bed boiler of the olefin branch has been bro ken many ＂times, which seriously affects ＂the safe operation of ＂the device. After ＂the site investiga tion, ＂the main reason for ＂the fracture of ＂the slag pipe is that ＂the pipeline is at a high temperature of 800℃ for a long ＂time. Due ＂to ＂the improper selection of expansion joint and steel pipe manufac turing, fatigue fracture occurs under ＂the action of ＂thermal stress. The auxiliary measures were a dopted such as upgrading ＂the material of ＂the slag pipe from 316 stainless steel casting pipe ＂to 310S stainless steel hot rolling pipe, re selecting ＂the ＂type of expansion joint and reforming ＂the slag pipe structure, so as ＂to ensure ＂the reliability of ＂the device.
作者
李吉承
张璐
刘杰
邵小兵
LI Ji-cheng;ZHANG Lu;LIU Jie;SHAO Xiao-bing(Shenhua Ningxia Coal Industry Group Co.Ltd.,Yinchuan 750411,China)
出处
《石油化工设备》
CAS
2018年第4期65-68,共4页
Petro-Chemical Equipment
关键词
循环流化床锅炉
下渣管
断裂
膨胀节
改进
circulation fluidized bed boiler
slag pipe
fracture
expansion joint
improvement
