天然气中硫化氢超声速凝结特性  

Supersonic Condensation Characteristics of Hydrogen Sulfide in Natural Gas

作　　者：曹学文[1] 王春智 孙文娟[1,3] 牟林升 CAO Xuewen;WANG Chunzhi;SUN Wenjuan;MOU Linsheng(College of Pipeline and Civil Engineering,China University of Petroleum,Qingdao 266580,China;Department of Chemical Engineering and Safety,Binzhou University,Binzhou 256600,China;Planning Research Institute,CNOOC Research Institute Co.Ltd.,Beijing 100028,China)

机构地区：[1]中国石油大学(华东)储运与建筑工程学院,山东青岛266580 [2]滨州学院化工与安全学院,山东滨州256600 [3]中海油研究总院有限责任公司规划研究院,北京100028

出　　处：《石油学报（石油加工）》2019年第4期721-729,共9页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家自然科学基金项目(51274232);国家重点研发计划专项(2016YFC0802302);中央高校基本科研业务费专项资金项目(16CX06004A)资助

摘　　要：基于欧拉-欧拉双流体模型,结合凝结相变理论建立气体自发凝结数值模型,对所设计Laval喷管内硫化氢气体的自发凝结特性进行模拟研究,分析入口压力、温度及背压对凝结过程的影响。结果表明:气体高速膨胀产生的低温效应使天然气中硫化氢气体发生自发成核及液滴生长现象,气相中硫化氢含量随之降低;增大入口压力或降低入口温度将使凝结发生位置前移,促使更多的硫化氢从气相中凝结出来,过低的入口压力或过高的入口温度将使硫化氢气体无法在喷管内完成自发成核过程。随着背压的升高,激波在喷管内产生并逐渐前移,激波的产生会破坏凝结所需冷凝环境,造成凝结液滴的再蒸发,应合理选择背压以避免激波对硫化氢气体凝结过程的影响。The supersonic condensation characteristics of hydrogen sulfide (H 2S) in a Laval nozzle was numerically simulated by the Eulerian-Eulerian dual-phase model and the condensation theory.The effects of inlet pressures,temperatures and back pressures on the condensation process were analysed.The results show that spontaneous nucleation and droplet growth of H 2S are due to the cryogenic effect generated by supersonic expansions.As a result,the content of gas-phase H 2S decreases.The condensation occurs earlier at higher inlet pressures or at lower inlet temperatures,making more H 2S condensing into the liquid phase.The spontaneous nucleation process cannot be completed when the inlet pressures are too low or the inlet temperatures are too high.Shock wave moves forward in the nozzle when back pressures are increased.The generation of the shock wave destroys the environments required by the condensation process,causing the re-evaporation of the condensed droplets.Hence,back pressures have to be reasonably controlled to avoid the effects of shock wave on the condensation process.

关 键 词：高含硫天然气 脱硫 超声速 喷管 凝结 

分 类 号：TE645[石油与天然气工程—油气加工工程]