【摘要】 介绍了天然气长输管道干空气干燥工艺原理,基于质量守恒定律、相平衡原理和费克定律,建立了天然气管道干空气干燥过程机理模型和随后封闭过程的机理模型。运用隐式差分法求解了干燥模型的数值解和分离变量法求封闭过程的解析解,在此基础上编制了相应的应用程序,利用达州至毛坝管道的干燥实例验证了模型的正确性。更多还原

【Abstract】 Natural gas has to reach certain dew point before it enters every household,which entails the dryness of natural gas transmission pipeline. The air drying process consists of two parts: air drying and water soaking, which are both complicated heat and mass transfer process. Based on the mass conservation,phase equilibrium and the Law of Fick,two parts’ models are established. The equations in drying process are solved numerically and soaking process analytically. And the models are used for pipeline drying in West-East Gas Transmission Pipeline Project,which justifies the correctness of these models.更多还原