针对国内天然气凝液回收的要求，提出了一种基于干气循环的改进RSV乙烷回收流程：丙烷与混合冷剂制冷的RSV流程（RSV-P-M）。运用HYSYS软件模拟回收乙烷及以上组分。为了分析乙烷回收过程中能耗较高、有效能利用较低的问题，对改进流程进行了GFDA3分析、灵敏度分析。研究结果表明，塔器及节流阀具有较大不可逆性，冷箱改进潜力明显。以GFDA3效率、GFDA3损、乙烷回收率、能耗为目标函数，采用单因素分析法对不可逆性较小的设备进行参数优化后，乙烷回收率提高了2.58%，综合能耗减少了155 640 MJ/d，流程GFDA3效率提高了10.58%，经济效益得到显著提高。

In the light of China's requirement on natural gas condensate recovery,one high-efficient modified RSV ethane recovery process is put forward,which recycles split vapor with propane and mixed refrigerant refrigeration cycle (RSV-P-M).By means of HYSYS software,the recovery of ethane and higher alkane components is simulated.In order to solve the problems of high energy consumption and low energy utilization rate in the process of gas-rich ethane recovery,both exergy analysis and sensitivity analysis are performed to the modified process.Analysis results indicate that tower and throttle valves show more irreversible,and the heat exchanger has a greater improvement potential.Taking exergy efficiency,exergy destruction,ethane recovery rate,energy consumption as the objective functions,the single factor analysis method is employed to optimize the parameters of equipment with less irreversibility.After the optimization,the ethane recovery rate increases by 2.58%,the comprehensive energy consumption drops by 155,640 MJ·d^-1,the process exergy efficiency is improved by 10.58%,and the economic benefits are significantly improved.

蒋洪(1965-),男,硕士,教授,研究方向为油气集输及处理技术