摘要
某乙烯装置碳三加氢冷却器于2015年5月检修后投入使用,运行18个月后出现管束泄漏,导致装置被迫改变工艺流程,造成了MD和PE无法按照正常工艺流程进行加氢反应为丙烯从而造成大量碳三组分损失,丙烯产量下降,严重影响装置的经济效益。针对此冷却器管束泄漏情况,采用电涡流检测技术对其进行涡流检测,根据远场涡流检测数据和图像,评定管束的壁厚损失情况,并提出检修检验及预防措施。检测结果表明:该冷却器管束存在大面积的减薄和凹坑,无法满足装置长周期运行要求,需要采取进一步的防护措施,保证安全平稳生产。这也是远场涡流检测技术在百万吨乙烯装置设备性能评价方面的验证性应用。
The C3 hydrogenation cooler(E-5211)of an ethylene plant was put into operation after the overhaul in May 2015.After 18 months of operation,the tube bundle leaked,so the plant was forced to change the process flow,and the MD and PE could not be hydrogenated to propylene as normal,leading to the loss of a large amount of C3 components and the decrease in propylene production,and seriously affecting the economic benefits of the plant.In view of the leakage of the heat exchanger tube bundle,eddy current testing technology was adopted to detect the tube bundle.The wall thickness loss of the tube bundle was evaluated based on the data and images of far-field eddy current testing,and the inspection and preventive measures for overhaul were put forward.The test results showed that the heat exchanger tube bundle has large areas of thinning and pits,which cannot meet the requirements of long-term operation of the plant,and further protective measures are needed to ensure the safe and stable production.This is also the validation application of far-field eddy current testing technology in equipment performance evaluation of megaton ethylene plant.
作者
周家成
谷阳
周琳
赵万庆
王明明
Zhou Jiacheng;Gu Yang;Zhou Lin;Zhao Wanqing;Wang Ming-ming(PetroChina Dushanzi Petrochemical Company,Dushanzi,Xinjiang,P.C.833699)
出处
《乙烯工业》
CAS
2019年第4期26-29,I0001,共5页
Ethylene Industry
关键词
换热器
涡流检测
腐蚀
heat exchanger
eddy current testing/ECT
corrosion
