Study On Structure And Performance Of Double Cylinder Centrifugal Separator

Gas-liquid separation is widely used in industry fields.For the inline gas-liquid centrifugal separators,their separation performance is greatly influenced by the inlet flow conditions,and the separation performance under unstable flow patterns is not ideal.To address the shortcomings of existing separation devices under unstable flow patterns,this study proposes a double-barrel gas-liquid separator that combines gravity and centrifugal separation principles and its separation performance is investigated experimentally and numerically.Firstly,the effects of gas-liquid flow rate and installation angle on separation efficiency at the atmosphere condition are studied.The results show that the separator keeps high-efficiency separation performance within a wide range of flow rates.Changes in gas and liquid flow rates have little effect on separation performance.When the installation angle changes from 60° to 30°,the separation effect at the gas outlet improves,while the separation effect at the liquid outlet deteriorates.Liquid level height has a significant impact on separation performance,and the separator can maintain a high separation efficiency within a certain range of liquid level fluctuations.Based on the experimental results,the operating and structural parameters of the separator on separation performance are analyzed by CFD method.The simulation results show that the separator can maintain high-efficiency separation within a certain range,but separation efficiency significantly decreases when the liquid flow rate exceeds 11m3/h.Structural parameters such as external barrel diameter,internal barrel diameter,number of openings,and impeller outlet angle all have certain effects on separation performance.These parameters have a more significant impact on the gas outlet than on the liquid outlet,which is mainly affected by liquid level fluctuations.After that,a large-scale separator that can be applied under large flowrate condition is designed,and the separation performance of the separator under different inlet gas volume fraction,liquid flow rate,and inclination angles is studied.