Study On Optimization Running Of Low-throughput Waxy Oil Pipeline

Many crude oils produced in China are the high-pour-point waxy crude or the heavy crude with poor flour ability,so the heating transportation process are generally applied to pipeline.In recent years,the problem of low-throughput running oil pipeline has become increasingly prominent,resulting the problem of waxy pipeline become more serious.The operation cost of the waxy oil pipeline is mainly composed of power consumption cost and fuel cost.Often due to unreasonable operating parameters of the pipeline,resulting in the energy consumption of the pipeline running high,the cost is too large.Therefore,it is necessary to study on the optimization running of low-throughput waxy oil pipeline.Based on the analysis and research on the optimal work of domestic and overseas oil pipelines,with summary of practical experience,this article issues the optimal analysis for oil pipeline grounding on dynamics and thermodynamics theories.Concerning the content of this research,effects of operational charges being considered,the temperature of inlet oil,the temperature of outlet oil and wax layer thickness as research objectives,and under the comprehensive constraining conditions which include thermodynamic and hydrodynamic constraining,the mathematic mode of oil pipeline's optimization is built.According to invalidate transform between non-linear constraining function and linear constraining function,and the disable partial differential coefficient of first order for objective function,numerical calculation method has been chosen for the built mathematic mode,meantime,a managerial software for oil pipeline's optimization is programmed.Using numerical calculation method and Microsoft visual basic 6.0 combined with the practical example to solve the model.The results show that the model reflects all the affecting factors,calculation is reliable and program is accurate.