红外技术在催化裂化装置再生器衬里损伤诊断中的应用

摘要

The regenerator is the core equipment of the fluid catalytic cracking unit (FCCU).The lining in the regenerator is subject to the damages under the long-term impingement of fluidized catalysts.The regular on-line monitoring of external surface temperature of regenerator by infrared technology can find problems as early as possible,and allow the people to take timely measures to eliminate unsafe potential.This paper introduces the basis of infrared technology and diagnostic of lining damages.The high-temperature region of regenerator of a petrochemical company was continuously monitored and the causes of temperature overrun and degree of damages were analyzed.The trend of temperature changes was observed and effective measures were recommended accordingly.After application of welding steel plate and steam cooling,the maximum temperature was controlled below 400 ℃.The area of hot spot remained stable.The FCC unit had been operating smoothly till 2012 before scheduled overhaul.The infrared technologies have played an important role in the long-term safe operation of FCCU regenerator.%催化裂化装置再生器是该装置的核心设备,衬里长期受流化催化剂冲蚀极易受到损伤,应用红外技术对再生器外壁温度进行定期在线监测,可及早发现问题,及时采取措施,排除安全隐患.介绍了红外热像技术和衬里损伤诊断依据,针对某石化公司再生器定期监测中发现的超温区域实施连续重点监测,分析超温原因及破坏程度,观察温度变化趋势,提出处理措施.采用加焊钢板和喷蒸汽降温措施后,热点温度最终控制在400℃以下,热点面积保持稳定,装置运行平稳,避免了非计划停工.