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胜利油田东营压气站国产50×104m3/d气体处理装置由于进站伴生气量降低,膨胀机偏离设计工况,导致装置的C3收率下降,能耗增加。通过工艺流程模拟,分析了不同气体处理工艺对装置C3收率的影响,提出了采用正升压膨胀制冷和增设DHX塔相结合的工艺方法,对气体处理装置进行技术改造。在相同条件下,DHX工艺可使装置C3收率由原来的72%提升至95%。当压力为3.3 MPa时,轻烃产量达到最大值。此时膨胀机增压段的出口压力为4.27 MPa。
As a result of the decrease of associated air volume at the station, the expander deviated from the design conditions, resulting in a decrease of the C3 yield of the device and an increase of energy consumption. Through the simulation of process flow, the influence of different gas treatment processes on the yield of plant C3 was analyzed. The technological process of combining the positive pressure expansion refrigeration with the addition of DHX tower was proposed and the gas treatment plant was reformed. Under the same conditions, DHX process can make the device C3 yield from the original 72% to 95%. When the pressure is 3.3 MPa, the light hydrocarbon yield reaches the maximum value. At this point the expander supercharger outlet pressure of 4.27 MPa.