Performance Optimization Of A Cyclone Separator With Axial Guide Vane For Gas-liquid Mixture

In the petrochemical industry,the purification and separation of mining oil gas is an essential process for not only increasing the efficiency of development,but also reducing environmental pollution.As the most important separation equipment,separators directly determine the effects of the oil gas separation and have vital significance for the development and utilization of oil gas.However,currently,a large number of common cyclone separators are structural old,resulting in higher pressure drop and lower separation efficiency.Axial guide vane cyclone separator features advantages such as simple structure,higher separation efficiency,smaller volume and easy to install,and has been widely used in petroleum,chemical,biological,and environmental protection industries.In this thesis,the gas-liquid separation performance is investigated considering the effects of blade structure and cone structure of the axial guide vane cyclone separator.The effects of blade number,blade height,blade cycle and cone bevel are numerically simulated and experimental studied to get the gas-liquid separation performance.Firstly,the gas-liquid separation mechanism and numerical simulation method of axial guide vane cyclone separator are discussed.Geometric model is built with CAD software,Gambit and Fluent software are used to mesh and simulate the flow field in the axial guide vane cyclone separator.Then the pressure field and velocity field in the cyclone separator at different inlet velocities and droplet diameters are ploted and analyzed.Then,based on similarity theory,an experimental system was built to test the pressure drop test and separation efficiency.In the experiment,the pressure drop at different inlet velocities and separation efficiency at different droplet diameters were measured,and the pressure drop characteristics and separation efficiency characteristics are studied.These results are compared with that from numerical simulation to verify the rationality of the numerical method.Finally,the flow field in the cyclone separator is simulated at different blade numbers,blade heights,blade cycles and cone bevels,to reveal the effects of blade structure and cone structure on gas-liquid separation performance.The results show that:(1)when the blade number is within the scope of 3,4,5,6,7,8,with the increase of the blade number,the separation efficiency decreases and the pressure drop steadily declines;(2)when the blade height is within the scope of 35,40,45,50,55,60 mm,with the increase of the blade height,the separation efficiency decreases and the pressure drop steadily declines;(3)when the blade cycle is within the scope of 0.15,0.20,0.25,0.30,0.35,0.40,with the increase of the blade cycle,the separation efficiency increases first and then decreases,and the pressure drop steadily rises;(4)when the cone bevel is within the scope of 6,7,8,9,10,11,12,with the increase of the cone bevel,the separation efficiency increases first and then decreases,and the pressure drop steadily rises.Based on the comparison of numerical simulation and experimental study,the optimized structure of the axial guide vane cyclone separator is obtained and optimization suggestions are provided on the blade number,blade height,blade cycle and cone bevel for production practice.