Experimental And CFD Study On Performance Of A New Type Of Vane Gas-liquid Separator

Vane gas-liquid separators are widely used in petroleum,chemical industry,energy and other fields because of their simple structure,convenient operation and good separation performance.However,due to the difference of the droplet size,the types of the gas-liquid separators are varied and the separation performance also has a large gap.This paper studies the Anderson series of gas-liquid separators which are widely used in superheating equipments,such as boiler drum.Besides,the detailed structure and internal dimensions of the separator remain unclear yet,so their separation performance can’t be qualitatively or quantitatively analyzed.In this paper,six new types of vane gas-liquid separators are selected as the research objects through literature research and the performance of the separator is studied by numerical simulation and cold-model experiment.The main research contents for:(1)A commercial software Fluent 18 is used to simulate the gas flow field of different structures under different operational conditions.Based on that,the discrete phase droplets are added to calculate its separation efficiency.(2)A gas-liquid separation system is set up and the total efficiency and the grade efficiency are measured by weighing method and the Promo 3000 aerosol spectrometer.At the same time,the efficiency and pressure drop of each structure under different conditions which are obtained by experiment and simulation are compared.The results show that the new type of vane gas-liquid separator has higher separation efficiency and lower pressure drop for droplets with a particle size greater than 8μm.Among all of the structures,the structure which of the angle of the slotting is 45° and the number of the slots is 45 has the best performance.Based on the phenomenon of short cut flow in gas-liquid separator,the structure is optimized and its separation performance is also studied by simulation and experiments.The results show that the short cut flow phenomenon can be reduced and the separation efficiency can be improved by adding the ring baffle.Also,the separation performance is the best when the height of the baffle is within the range of 30-40 mm.