Study Of High-pressure Gas-liquid Separator Cyclone Drain Tube Improved Scheme

In this paper,the drain tube of high pressure gas-liquid separator cyclone is mainly studied in the field,and its erosion problem which occurs in the production process is aimed,improved scheme are proposed and researched.The major research contents are as followed:(1)Combined existing erosion wear theory and actual situation,it is analyzed various factors which impact erosion rate.(2)According to original drain pipeline(single needle valve)and two improved models,which are consisted of needle valve and throttle nozzle in series,the selection of appropriate flow model,flow field characteristics such as pressure,velocity of the fluid are simulated and researched under different valve opening.(3)Fluid-solid coupling,it is analyzed erosion and its causes around flow field,the erosion rate of original model and two improved models is compared under different valve opening,and it is concluded a more reasonable improvement scheme.(4)Chock manifold,which is consisted of various diameter parallel nozzle is set after improved scheme is curtained and it is utilized based on the requirements of downstream device.Moreover,the situations that different diameter of nozzles are in parallel are simulated.In this paper,standard k-? model,second order upwind difference scheme,pressure interpolation format of PRESTO! and SIMPLEC are set in Fluent to run numerical simulation.And the conclusion is that the part of needle valve suffered less erosion wear,when valve and nozzle are set in series,and valve is in front of nozzle the erosion rate of needle valve is least,so this model is the most reasonable.According to the best scheme,chock manifold is set.Meanwhile,different erosion situations of chock manifold are studied to provide certain theoretical guidance for the production of actual application.