Optimization membrane module structure of column type by CFD

Gas-liquid two-phase fluid in membrane module of different column type was simulated by Euler model and porous medium model. The effect of the length of membrane module and the number of aerator holes (opening rate=1.92%) on gas-liquid distribution, wall shear stress, turbulent viscosity and velocity of liquid was investigated by CFD simulation. The simulation results showed good agreement with the experimental data. The results demonstrated that uniform distribution of gas-liquid and water velocity, the intensity of wall shear stress and turbulent viscosity was efficiently improved by decreasing the diameter of aerator holes and increasing the number of aerator holes; increasing the length of membrane module was significantly benefit to improve the capacity of a single membrane module, and make full use of gas scrub the wall of membrane. Considering installation, transportation, distribution of membrane flux and energy consumption, the membrane module with the diameter 250 mm that the diameter and the number of aerator holes respectively is 6.32 mm and 30, and the length of membrane module is 2-2.5 m exhibited a best performance.