降低凝析油中H2S含量的工艺模拟及优化

中亚某油气处理厂因稳定凝析油产品中H2S含量较高,在凝析油装车过程中,装车台周边空气中H2S浓度较高,严重影响操作人员人身安全。通过对稳定凝析油中H2S超高的原因进行分析,利用HYSYS软件对凝析油稳定装置进行了模拟。模拟结果表明,在未对工艺流程及工艺设备进行整改的情况下,保持塔底温度在155~160℃的范围,塔顶压力为0.3 MPa,调整塔顶、塔中部进料质量比为1∶1,稳定凝析油中H2S质量浓度从约170mg/L下降至约20mg/L,装车台周边未监测到H2S。

Process simulation and optimization to reduce H2S content in condensate oil

The source of hydrogen for the start-up of continuous catalyst reforming unit, mechanism and process flow of hydrogen-producing technology using naphtha or refined naphtha, investment of hydrogen-producing technology etc. were discussed. Combined with the start-up of two sets newly built hydrogen production device of 600×10³ t/a continuous catalyst reforming unit, the two kinds of start-up hydrogen-producing scheme were compared and analyzed. Conclusions are drawn as follows:If the start-up hydrogen is difficult to get, a set of hydrogen-producing device for unit start-up using naphtha or refined naphtha may be increased. Hydrogen-producing device using refined naphtha is suitable for the refinery with enough refined naphtha. Otherwise, hydrogen-producing device using naphtha should be preferentially considered. The catalyst cost accounts for a high proportion of about 67.48% of the total investment for hydrogen-producing technology.