| Gas-Liquid cyclindrical cyclone Separator(GLCC)is being paid more and more attention in subsea oil-gas treatment process.Its declivitous tangential inlet can transform different inlet flow pattern to stratified flow,especially to the gas continuous phase and low gas-liquid ratio,the GLCC has more separating effect.However,in the condition of the high speed mist flow,it will generate the question of liquid membrane wall climbing and liquid drop escaping from outlet.In consequence,we should design the oil-gas separation apparatus in new view,due to gas-solid cyclone separator and GLCC,the under-water two-stage gas and liquid cyclindrical cyclone was designed and developed.Set an exhaust pipe into Separator to enhance the internal rotational flow and separate the escaped drops,and have some useful design in correlation auxiliary components.Through testing and comparing the variation of inlets’ and outlets’ particle size distribution,the separation performance of separator was analysed.By changing inlet flow pattern and impacting the separator,we realized the underwater adaptation of separator,and concluded the optimum structure of under-water two-stage gas and liquid cylindrical cyclone,and designed relative program to reference.All the study can guide and reference the design of demostic subsea gas-liquid separator.The conclusion are as follows:Relying on the mature concept design of gas-solid cyclone separator,making use of the twice rotational flow by exhaust pipe,the exhaust pipe is inserted to the inner of the separator.Comparing and analyzing the pressure drop and separation performance in different inlet flow,different inlet gas-liquid ratio,different inlet drop particle size and volume fraction,determining the diameter and depth of separator’s exhaust,and by setting the reflux pipe refluxing the escaped drop,setting the nospin structure to bring the rotating vortex core down,to designed and optimized the partial of separator.Testing the separation performance of under-wate two-stage cyclindrical cyclone separator in the condition of mist by Malvern-Insitec online laser particle analyzer,making sure the distribution of drops’ particle accord to the Log-normal probability sensity distribution,judging the separation performance of separator by comparing the mid-value particle size and specific surface area diameter of outlet and inlet.Deteming the most optimum of the separation.By experients to test the different inlet gas velocity in low gas-liquid ratio and different inlet flow pattern,verifying the structure which had been determined,and finding the losing efficacy point of separator,determing the most optimum structure and most optimum applied range,and design the procedure at last. |
