乙烯球罐区储运工艺设计探讨

DISCUSSION ON PROCESS DESIGN OF ETHYLENE SPHERICAL TANK FARM

介绍了典型的乙烯球罐区储运工艺流程和控制方案。重点对液相乙烯管路系统的超压工况及安全阀选型和设置方案,乙烯泡点气回收处理量的确定和回收方案对比,低温乙烯火炬气排放处理措施,泵配置原则,液相输送系统排气方案及排气管路设计,罐区首次开工预冷方案等储运工艺设计的要点、难点进行了阐述,归纳总结了常见的设计问题,强调了需给予高度关注的内容,并给出了解决方案及合理建议。

This article gives a brief introduction of the typical storage and transportation process and control scheme of ethylene spherical tank farm,mainly discusses and summarizes the key points and difficulties in the storage and transportation process design such as the overpressure conditions of liquid ethylene piping system and the type selection and design schemes of safety relief valves,the determination of recovery capacity of boiled-off gas and the comparison of recovery plans,the treatment measures for low temperature ethylene flare gas discharge,the principles for pump configuration,the exhaust scheme and exhaust piping design of liquid phase conveying system and the precooling scheme for the first start-up of ethylene spherical tank farm,summarizes the common problems in design,emphasizes the notable issues and provides some solutions and reasonable suggestions.