Study On The Flow Characteristics Of Vane-Type Gas-Liquid Flow

Vane-type gas-liquid cyclone has the advantages of high separation efficiency,low energy consumption,small size,compact structure,large processing capacity,simple operation and wide application range as a new type of gas-liquid separator,which can meet the needs of both land and deep sea oil and gas exploitation.At present,there are few studies on the characteristics of gas-liquid two-phase flow field in vane-type gas-liquid cyclones,and field experience is lacking.Moreover,the performance of vane-type gas-liquid cyclones at high gas holdup needs to be further optimized.Therefore,in order to ensure the efficient separation of gas-liquid flow,the following work was carried out in this paper under different inlet flow conditions of low and high gas content,using experimental and numerical simulation methods:1.The effects of gas holdup rate,inlet flow rate and split ratio on the separation efficiency and pressure drop of the degassing vane-type gas-liquid cyclone were tested experimentally.The changes of the gas core in the cyclone and the escape airflow trajectory under different working conditions were obtained by using a high-speed camera.The results show that with the increase of gas holdup,the separation efficiency and energy consumption of the cyclone decrease.With the increase of inlet flow,the separation efficiency of cyclone increases and the energy consumption increases.With the increase of the split ratio,the separation efficiency of the cyclone first increases and then remains unchanged.In the case of low gas holdup,the volume flow of escaping gas is small,and the cyclone has excellent performance.2.Using Fluent software,using the Eulerian multiphase flow model coupled,Reynolds stress turbulence model for gas pipeline type gas-liquid cyclone gas-liquid separation in numerical calculation,studied the gas rate and inlet flow rate and split ratio on the separation efficiency and pressure drop,the effects of cyclone and under different working conditions are obtained in the gas phase distribution and speed variation.The numerical simulation results can fit the experimental results well and have a certain accuracy.3.A new dehumidification type of gas-liquid cyclone is designed and processed according to the performance defects of the traditional gas-liquid cyclone under the condition of high gas inflow.Compared with the traditional gas-liquid cyclone,this cyclone has higher separation efficiency and smal er pressure drop,so it has a good application prospect.4.By using Fluent software,Euler-Lagrange method and discrete phase calculation of liquid phase,the influence rules of gas holdup,inlet flow and droplet size on separation efficiency and pressure drop of dehumidifier pipe type gas-liquid cyclone are obtained.The results show that with the increase of gas holdup,the separation performance of the cyclone decreases and the energy consumption decreases.With the increase of inlet flow,the separation performance of cyclone increases and the energy consumption increases.With the increase of droplet size,the separation performance and energy consumption of the cyclone increase.