冷凝式油气回收系统设计研究

设计了一种冷凝式油气回收系统,其制冷系统由单级压缩预冷单元与单级压缩2级自动复叠单元复叠而成。应用物性软件REFPROP对混合制冷剂的性质进行分析,应用大型通用流程模拟软件对油气负荷及制冷流程进行了模拟计算,研究了非共沸混合制冷剂配比变化对自动复叠单元压缩机性能的影响;通过对系统的模拟运行,研究了该冷凝式油气回收系统的工作性能,分析了冷凝温度对油气回收率和尾气油气含量的影响;在系统分析和模拟研究的基础上,为冷凝式油气回收系统关键设计参数选择提供了理论依据。

Design and study on condensation refueling gas recovery system

A condensation refueling gas recovery system was designed in this paper,in which the three-stage cascade refrigeration system was composed of single-stage compression pre-cooling unit and two-stage auto cascade unit.In order to syudy the effect of the proportion of the non azeotropic mixture refrigerant on the performance of the compressor used in the auto cascade unit,the software REFPROP was employed to analyze the physical properties of the non azeotropic mixture refrigerant and a common process simulation software was applied to emulate the refrigeration process and compute the load used to condense the refueling gas.According to the simulation results,the performance of condensation refueling gas recovery system was studied and the influence of the condensation temperature on the refueling gas recovery rate and the refueling gas content of the off-gas was analyzed.Based on the system analysis and simulation studies,a criterion to choose the key design parameters for the condensation refueling gas recovery system was given.