Numerical Simulation And Experimention Study Of An Inline Deliquidiser

With the further development of proven reserves and exploitation of offshore oil and gas,and the environment of newly developed oil and gas fields onshore was getting worse,oil and gas extraction and processing facilities were faced with the problems such as the technology was limited,the working space was limited and the handling capacity of gas and liquid separation equipment was insufficient.Because of its great reduction of space saving,reducing investment and maintenance costs,and maximizing the efficiency of equipment separation,inline deliquidiser had become a new trend in the design of new facilities in recent years.But there was no systematic design specification at home and abroad.And the current domestic research focused in the gas-liquid separation concentrated on the development and optimization of traditional gas-liquid separation technology and equipment.The research on compact gas-liquid separation technology,such as inline separation,was still in the exploratory stage.The theory and related research on the localization of the inline deliquidiser were eager to solved.To develop an inline deliquidiser with independent intellectual property rights,to meet the needs of the domestic oil and gas development field,and to reduce the high cost and maintenance cost of imported equipment.In this study,access to domestic and foreign related published data and combined with the prophase to design more reasonable uniform inline deliquidiser,studied on the combination of numerical simulation and experimental study.Based on the structure of designed inline deliquidiser was used to simulate the 3D numerical simulation.The characteristics and distribution of the velocity field,pressure field and turbulent flow field were studied.The influence of flow parameters and the key structure parameters such as liquid content and flow rate on the performance of liquid removal was analyzed.The separation efficiency increases firstly and then decreases with the increase of the liquid content in the gas-liquid mixture.The pressure loss increased with the increase of the liquid content.Separation efficiency and pressure loss increases with the increase of inlet velocity,and pressure loss was the trend of the first approximate linear increase.The separation efficiency increases firstly and then decreases with the increase of the number of leaves,while the pressure loss increases with the increase of the number of leaves.The separation efficiency and pressure loss increased with the increase of the blade exit angle.The optimal blade number was 8,and the optimal blade angle was about 45 degrees.The separation efficiency increases firstly and then decreases with the increase of the length diameter ratio of the separation chamber.The pressure loss increases with the increase of the length diameter ratio of the separation chamber,the optimal range was 12.5-17.5.The separation efficiency increases firstly and then decreases with the increase of the gas outlet pipe diameter ratio.Pressure loss decreased with the increase of gas outlet pipe diameter ratio,and the best gas outlet pipe diameter ratio range was 4/8-6/8.The separation efficiency with the gas outlet pipe length increase showed increased firstly and then decreased.Pressure loss was exported with the gas pipe extending to the increase of the length of the increase,and gas outlet pipe extends into the length of the optimal range for 2/10-3/10.The separation efficiency increases with the increase of the catheter diameter ratio.The pressure loss decreases with the increase of the catheter diameter ratio.And the best guide pipe diameter ratio was in the range of 5/8-7/8.Through the indoor test apparatus designed inline deliquidiser were carried out to verify.The test device showed good separation performance,which verified the feasibility,stability and reliability of the inline deliquidiser and the test device.The separation efficiency and pressure loss increases with the increase of the flow rate,and the result was similar to that of numerical simulation.Under the condition of lower liquid content,it has a good effect of removing liquid,but it has little effect on the pressure loss.The separation efficiency increases with the increase of droplet size,and the pressure loss decreases with the increase of droplet size.The independent design of inline deliquidiser can provide a basis and reference for subsequent inline deliquidiser design calculation theory,operation parameters and flow parameters selection and optimization,experimental research and industrial application.