Topography And Natural Gas Gathering And Transportation Pipeline Pigging Numerical Simulation Studies

With the constant development of the natural gas industry,pipeline industry has entered a gold stage of development also,which has been confirmed by the booming construction of the global pipeline engineering.Our government also regard the pipeline construction as the key position and then operated the large pipeline such as the west-east gas transmission, sichuan west-east gas pipeline and so on.These energy artery played an important role in the development of national economy.The related pipeline technology has been put in a important role while the pipeline industry booming,one of them is the pigging technology.The pigging technology have a widly use both in new pipelines and pipe which has been used.The article briefly introduce the flow chart and operating principle of the pigging system.The article is focused on the study of change rule of the basic Parameters while the pigging process in roughness of relief circumstance.Among them.the pipeline liquid loading caPacity is the important technical description which can be used to evaluate the effect of pigging.Therefore.firstly introduced the calculation method of pipeline liquid holdup.then establish pipeline physical model according to the different situation while analysis the coupling.Combining with the calculation method of pipeline liquid holdup and basic equations of fluid meet,we can get pigging mathematical model.According to the established Pigging model, calculations'process were divided into blocks by the different functions, and application of computer C language programming to its processing, then the combination of each function block calculate the parameters of the pigging, in order to simulate the pigging process of terrain gas gathering pipeline.For the project example of a natural gas gathering and transportation pipeline, combination of the above pigging mathematical model created, by the preparation of the final program calculate a series of basic pigging parameters. At the same time, these results compared with the result calculated by PIPEPHASE software, some results was absolutely consistent with,the error of the other results within the allowable error in the project, in general, to reach a better calculation results. Then the resulting data was plotted curve, observed the changes of curve in order to understand the law of liquid holdup in the pipeline, pigging ball speed, along the pressure changes of basic parameters, Finally, a single change in pipeline diameter, flow, pressure and other basic parameters, and thus from the whole of pipeline to study affection on pigging parameters, meanwhile, change in single pipe of inclination,the length, from the local to study affection on the pipe basic pigging parameters. Both provide a theoretical basis for the operation control of two-phase pipeline pigging.