Studies on hydrodynamics of slurry turbulent bubble column(I) Gas holdup and its radial distribution
The slurry bubble column operating at turbulent flow regime is of practical importance.The average gas holdup and gas holdup radial distribution in the column were measured under the condition of high superficial gas velocity,high solid content and large column diameter,including both the experimental and industrial data.A novel gas holdup correlation was then obtained,which is applicable to industrial conditions.A simplified hydrodynamic model was developed to predict gas holdup distribution.Experimental results showed that gas holdup for the slurry system would decrease as the column diameter and solid content increased.In addition,increase of either column diameter or superficial gas velocity would cause gas holdup distribution steeper in the radial direction.The model computational results agreed well with experimental data.