SIMULATION OF VAPORIZATION HEIGHT BY CONSIDERING THE SIZE DISTRIBUTION OF DROBBLES IN DROBBLE COLUMNS

A model for drobbles in drobble columns, based on the concept of phase space and the population balance equation, is presented. This model a llows a consideration of the growth, breakage and coalescence of two-p hase drobbles. The splitting step method is employed in the numerical calculation while the Monte Carlo method is used for handling the brea kage and coalescence of drobbles. The vaporization height is a very im portant parameter in the engineering design of drobble columns with a vaporizing dispersed phase. Obviously this height has statistical char acteristics. The model has been used for the simulation of vaporizatio n height in this kind of system. The simulation results are in good ag reement with experimental data not only qualitatively but also quantit atively. Detailed information about the variation of distribution dens ity functions with column height is given both without and with consid eration of the breakage and coalescence of drobbles.