脱丙烯干气带液的原因及对策  

Liquid entrainment in dry gas after propylene absorption and countermeasures

作　　者：马献波 朱军 

机构地区：[1]海南实华嘉盛化工有限公司,海南省洋浦578101

出　　处：《炼油技术与工程》2011年第10期31-33,共3页Petroleum Refinery Engineering

摘　　要：阐述了第三代催化干气制乙苯技术在脱丙烯过程中因塔径过小、吸收剂发泡、管线存在U形弯等原因导致脱丙烯后的干气带液及其对烷基化反应及催化剂使用寿命的影响,利用河北工业大学CTST立体传质塔盘技术对脱丙烯塔进行了改造,并且在脱丙烯干气出料管线上增加旋风分离器等有效措施。结果表明:吸收剂的温度可降至15～18℃,在吸收剂流量125 t/h的操作条件下,脱丙烯效果好于改造前。烷基化反应的操作也得到了明显改善,三段干气进料能够均匀分布,催化剂床层的温升比较均匀,特别是第三段催化剂在改造后投入运行近一年,催化剂床层温升没有明显的下降,这说明干气带液的现象已基本消除。The small diameter of propylene absorption tower of 3rd-generation process of ethyl benzene production from FCC dry gas,the foaming of absorbent and U bent of pipelines has led to the liquid entrainment of dry gas after propylene absorption and the impact of liquid carry-over on the alkylation reaction and service life of catalysts.The propylene absorption column was revamped with combined trapezoid spray tray（STST） technology of Hebei University of Technology,and cyclone separator was installed on the dry gas outlet line.As the result,the absorbent temperature can be reduced by 10~18 ℃.The propylene removal rate is higher than that before the revamping at an absorbent flowrate of 125 t/h.In addition,the alkylation reaction is obviously improved,the dry gas feed is uniformly distributed and the temperature rise in catalyst bed is uniform.The is no marked falling of temperature rise in catalyst bed after 1 year operation of 3rd-stage catalysts,which indicates that the liquid entrainment of dry gas has been eliminated.

关 键 词：脱丙烯塔 雾沫夹带 烷基化 改造措施 

分 类 号：TQ241.1[化学工程—有机化工]