Study On The Effect Of Liquid-solid Structure On The Separation Efficiency Of Three-phase Cyclone Separator

Cyclone Separator has the advantages of simple structure,low cost and high separation efficiency,it is widely used in the production process of oil and gas separation.In this paper,the method of combining the theoretical analysis and numerical simulation is used in the study of internal flow of Cyclone Separator.The structural parameters of Cyclone Separator are optimized by using numerical simulation method.The main research contents are as follows:(1)The initial model of the hydrocyclone is modeled by using theoretical analysis method,computational fluid dynamics software FLUENT is used in numerical simulation study of the gas phase,the RSM turbulence model is adopted to describe the velocity and pressure of the gas phase.(2)Phase-coupled Stochastic Model in Euler-Lagrange coordinates is used in numerical simulation analysis of gas-liquid,The movement of single particle and particle group analysis shows that the trajectories of droplets are different with different particle diameters and different intake positions,in addition,it can produce different phenomena such as,vent-pipe short circuit and particle trap return mixing to reduce the efficiency of separation,it need to be optimized.(3)The optimization scheme is established for the shortcomings of the initial model,The optimum structural model is determined by optimizing the simulation of liquid-solid outlet structure parameters,such as the height of the bottom pipe,the diameter of the bottom pipe and the height of the cone tube.(4)Based on the numerical simulation of gas-liquid flow,Mixture Model is used to numerical simulation on the gas-liquid-solid flow of the optimal Cyclone Separator.The distribution of concentration,velocity and pressure in gas-liquid-solid flow was analyzed.The separation efficiency and pressure loss of the Cyclone Separator under different inlet flow conditions are discussed.The optimum inlet flow interval of the optimized cyclone separator is determined to ensure efficient operation of the separator.The work of this paper provides a theoretical basis and references for further research of the separation mechanism,separation characteristic and structural optimization design of the three-phase cyclone separator.