乙烯低温储存系统汽化气气体处理工艺

随着我国低温储存系统应用的大型化发展,优化乙烯低温储存系统汽化气(BOG)气体处理工艺对降低装置运行能耗、节省投资的作用逐步增大。首先介绍了BOG气体的4种不同压缩制冷循环处理工艺;然后通过压焓图从理论上对其节能原理进行分析;同时根据实际数据对比不同工艺过程的制冷系数和能量消耗;最后总结出二次节流中间冷却工艺更为节能,为优化乙烯低温储存BOG气体处理工艺,实现节能降耗提出了适用性建议。

Boil off gas treatment process for ethylene cryogenic storage system

With the large-scale development of cryogenic storage system in China,the optimization of boil off gas(BOG) treatment process design plays an increasing role in the energy saving and cost reducing of ethylene cryogenic storage system.Firstly,four different BOG gas-compression refrigeration cycle treatment processes were introduced.And then the energy conservation principle was analyzed in theory by pressure-enthalpy figure.The refrigeration coefficients and energy consumptions of four different processes were contrasted based on the actual data.The results show that two throttles with intermediate cooling process is more energy-efficient.Some applicable suggestions on optimization of BOG treatment process and energy saving were submitted.