RSV乙烷回收工艺技术研究

Technical research on RSV ethane recovery process

对RSV工艺的流程特性进行研究,重点分析了外输干气回流比、低温分离器气相分流比以及脱甲烷塔操作压力对乙烷回收率以及装置系统能耗的影响。研究表明,增大外输干气的回流量、适当提高分离器气相的分流比以及降低脱甲烷塔操作压力能有效提高乙烷回收率。通过对RSV工艺的气质适应性分析发现,该流程对不同气质的原料气适应性都较好,乙烷回收率都能达87%以上,丙烷回收率均达99.99%。

This paper studies the process characteristics of recycle split vapor（ RSV） process,and analyzes emphatically the influences of the reflux ratio of effluent dry gas,the gas phase split ratio for the low temperature separator and the operational pressure of the demethanizer tower on the ethane recovery rate and the energy consumption of the facility system. The results show that the ethane recovery rate can be improved by increasing the reflux amount of effluent dry gas,increasing the gas phase split ratio of the separator and reducing the operational pressure of the demethanizer tower. In addition,it is found from analyzing the adaptability of RSV process against gas quality that this process exhibits good adaptability against any feed gas with ethane recovery rate exceeding 87% and propane recovery rate reaching 99. 99%.