采用HYSYS分析了不同气质在同一热集成形式、同一丙烷回收率下的流程特性,在此基础上研究DHX丙烷回收装置的热集成形式对气质的适应性,并基于流程的热集成分析理论,根据不同气质工况条件提出对具有不同操作工况的2种热集成方法。研究结果表明,在丙烷回收率相差不大的情况下,贫气、富气均适合将所有物流集中在单一主冷箱换热的流程,但富气需外加丙烷制冷,而在单一主冷箱换热的基础上对富气进行两级分离,既保证了丙烷的回收率又能进一步降低34.67%的冷箱UA和8.93%的装置能耗。

DHX propane recovery process has the advantages of high recovery rate and strong adaptability.HYSYS software is used to analyze the process's characteristics of different gas qualities under the same heat integration form and the same propane recovery rate.Based on this,the adaptability of the heat integration form of DHX propane recovery unit to gas quality is studied.Based on the process's heat integration analysis theory,two thermal integration methods with different operating conditions are proposed according to different gas quality working conditions.Research results show that under similar propane recovery rates,both lean gas and rich gas are suitable for the process that integrates all logistics in a single main cold box for heat exchange.The difference is that additional propane refrigeration is needed for rich gas.Rich gas is separated in two-stage based on the heat exchange of a single main cold box,which can ensure the recovery of propane,further reduces the UA of the cold box by 34.67% and the energy consumption of the unit by 8.93%.

蒋洪(1965-),男,硕士,教授,研究方向为油气集输及处理、系统能量综合利用及节能、汞污染控制