连续重整装置长周期生产中存在的问题及措施

总结了中国石化扬子石油化工有限公司1.39Mt/a连续重整装置在长周期运行中出现的一系列问题。通过采用低积炭速率催化剂解决了催化剂再生瓶颈;脱硅剂的应用能降低重整原料中的硅含量;先进控制技术大大提高了生产过程操作和控制的稳定性;通过控制反应-再生系统粉尘可减少装置非计划停车;从加热炉烟气余热回收、重整进料换热器碱洗以及脱戊烷塔在线水洗等方面提高设备运行效率;并通过重整反应器高温法兰加装弹性垫圈、第四反应器扇形筒结构改型等技术改造措施解决了生产难题。

PROBLEMS AND COUNTERMEASURES IN LONG-TERM RUNNING CCR UNIT

Some problems occurred during the long-term running of a 1.39 Mt/a CCR unit in Yangzi Petrochemical Company were summarized. Countermeasures were applied and these problems were solved, such as using low coke rate catalyst to solve the bottleneck of catalyst regeneration; using desilication adsorbent to reduce the silicon content of feedstock; controlling the catalyst fines in reactor-regeneration system to avoid emergency shut down; recovering waste heat from stack gas, alkali-washing heat exchanger and online water-washing depentanizer to enhance equipment running efficiency; adopting technology innovation including putting elastic washer on the high-temperature flange of reactor and remodeling the scallop structure of the fourth reactor.