催化裂化汽提段穿孔原因分析及解决办法  

Analysis of fracture of stripping section of FCC unit and solutions

作　　者：吴世权[1] 

机构地区：[1]中石油云南石化有限公司,云南省昆明市650399

出　　处：《炼油技术与工程》2016年第10期36-38,共3页Petroleum Refinery Engineering

摘　　要：重油催化裂化装置因汽提蒸汽管与汽提段环形挡板相贯处存在较大间隙,造成汽提蒸汽携带催化剂由此上行冲刷汽提蒸汽管,进而导致汽提蒸汽管磨穿,而汽提蒸汽管磨穿后高温蒸汽携带催化剂持续冲刷汽提段外壁,致使汽提段穿孔与第一再生器相通,进而造成整个装置全面停工,对企业造成巨大的经济损失。有针对性地对三种解决汽提段穿孔的方案进行了论证,提出了解决汽提段穿孔问题的有效措施,即采用汽提蒸汽由第一再生器进入汽提段的方式,不再贯穿整个汽提段环形挡板,该方法有效地解决了汽提段穿孔问题,减少因该问题而造成的装置停工。As there was a large space between stripping steam pipe and ring baffle plate in the stripping section of the heavy oil FCC unit, the stripping steam with catalyst carry-over flowed upward and eroded the steam pipe, leading to the erosion failure of stripping steam pipe. The high-temperature steam with catalyst carry-over from failed stripping steam pipe would continue to impinge and erode the external wall of stripping section, initiating the fracture of stripping section and direct connection with 1st-stage regenerator and causing the shutdown of the complete process unit and great economic losses of the company. Three solutions for the fracture failure of the stripping section were presented, and effective solution was selected on the basis of the data analysis and verification of commercial operation, i.e. the stripping steam directly flows to the stripping section from 1st-stage regenerator without flowing through the complete ring baffle plate. This practice can ef- fectively solve the problem of fracture of stripping section and minimize the losses from the un-scheduled unit shutdown.

关 键 词：催化裂化 汽提段 穿孔 

分 类 号：TE624.41[石油与天然气工程—油气加工工程]