天然气跨音速膨胀凝结研究进展  

Research progress on supersonic expansion and condensation of natural gas

作　　者：段振亚[1] 马志伟 付莉华 张俊梅[1] 梁龙辉 DUAN Zhen-ya;MA Zhi-wei;FU Li-hua;ZHANG Jun-mei;LIANG Long-hui(College of Mechanical and Electrical Engineering,Qingdao University of Science&Technology,Qingdao 266061,Shandong Province,China;Engineering Training Center,Shandong University of Technology,Zibo 255000,Shandong Province,China;Nanjing Tica Thermal Technology Co.,Ltd.,Nanjing 210038,Jiangsu Province,China)

机构地区：[1]青岛科技大学机电工程学院,山东青岛266061 [2]山东理工大学工程实训中心,山东淄博255000 [3]南京天加热能技术有限公司,江苏南京210038

出　　处：《化学工程》2020年第4期27-32,40,共7页Chemical Engineering(China)

基　　金：山东省重点研发计划(公益类专项)项目(2017GGX40113)。

摘　　要：天然气在跨音速膨胀凝结的过程中,水分和重烃的凝结是极其重要且起关键作用的环节,主要包括蒸气的凝结成核和液滴的生长过程。为了探求准确的蒸气成核和生长模型,文中阐述了蒸气成核及液滴生长理论的研究进展,总结了相关实验研究和数值模拟,分析了影响蒸气凝结的因素,并对凝结理论中亟待解决的问题进行了展望。研究结果表明:CNT模型和非等温修正的ICCT模型能较准确地预测单组分凝结过程;修正的双组分成核理论具有较好的准确性。亟待解决的问题有:液滴表面张力模型还不完善,无法准确计算微观表面张力;双组分成核理论的精确度不高;亟待探究多组分成核理论模型,以期为天然气凝结和提高超音速喷管的分离性能打下坚实的理论基础。The condensation of moisture and heavy hydrocarbons plays a major role in the supersonic expansion condensation of natural gas,including the condensation nucleation of condensable gases and the growth of droplets.The research advances in condensation characteristics of the Laval nozzle and separation mechanism of the supersonic separator in detail were reviewed from the perspectives of the oretical analysis,experiments and numerical simulation,and analysis the condensation factors.The results show that CNT model and non-isothermal modified ICCT model can predict the condensation process of single component gas,and the modified two-component nucleation theory has higher accuracy.The further research topics are clarified to promote applications of condensation theory and separation performance of supersonic nozzle such as the model of droplet surface tension is faultiness,two-component nucleation theory has a large error and exploring multi-component nucleation theory models.

关 键 词：天然气净化 凝结液化 蒸气成核 液滴生长 超音速喷管 

分 类 号：TE645[石油与天然气工程—油气加工工程]