S Zorb装置长周期运行分析

中国石化长岭分公司1.2 Mt/a S Zorb装置已连续运行40个月,对该装置长周期运行中在反应器过滤器的优化运行、提高原料换热器效率、处理再生吸附剂结块、减少临时转剂线磨损、闭锁料斗系统的维护等方面所采取的措施进行了总结分析。优化反应器过滤器运行的关键是加强反吹系统的维护、反应压力的平稳控制、大法兰密封的保护监测和间歇性将系统内细粉排出;保持原料的清洁度、减少原料换热器结垢可提高换热效率;利用原有卸粉尘流程可减少吸附剂结块对吸附剂循环的影响;在横管下料不畅的情况下,采取少而大的弯头配管形式取代多而小的弯头配管形式,有效地减少了临时转剂线的磨损;采取一系列措施保护闭锁料斗程控阀的磨损以及缩短闭锁料斗故障处理时间,为S Zorb装置与催化裂化装置同步连续运行提供了保证。

ANALYSIS ON LONG PERIOD OPERATION OF S Zorb UNIT

The 1.2 Mt/a S Zorb unit of SINOPEC Changling Petrochemical Company has been running for more than three years. The measures for optimizing the filter operation, improving the heat exchanger efficiency of raw material, processing and regenerating the adsorbent agglomerate, reducing the line wear of temporary transfer agent as well as lock hopper system maintenance were summarized during the long operation period. The key to optimization of reactor filter operation is strengthening counter blowing system maintenance, smoothing reaction pressure control, monitoring large flange seal protection and discharging intermittently the powder in the system; the thermal efficiency can be improved by maintaining the raw materials purity and reducing feed heat exchanger fouling; the effect of adsorbent agglomerate on adsorbent recycling can be reduced by using the original dust unloading process. In the case of the horizontal tube poor in unloading, using the bend pipe with little and big instead of many small bend pipe can effectively reduce the wear of temporary transfer agent line. A series of measures to protect the wear in lock hopper program-controlled valve and shorten the failure processing time of the lock hopper make the S Zorb device synchronize with catalytic cracking unit.