近年来 ,国内一些炼油厂的催化装置相继发生了设备事故 ,尤其是重油催化裂化装置的再生器、三旋及再生烟气系统主体设备发现了大量裂纹。这些裂纹多发生在焊缝、熔合线或热影响区内 ,不少裂纹为穿透性裂纹 ,并有烟气和催化剂外泄情况发生。目前 ,已有十几套装置的再生器或三旋? In recent years, some domestic refinery catalytic devices have occurred equipment accidents, especially heavy oil catalytic cracking unit regenerator, three-spin and regenerative flue gas system main equipment found a large number of cracks. These cracks occurred in the weld, weld line or heat affected zone, many cracks as a penetrating crack, and flue gas and catalyst leakage occurred. Currently, there are more than a dozen devices regenerator or three-spin?