An onedimensional mathematic model describing drying process of gas flow containing humid coal ash particles has been put forward

the heat transfer and mass transfer between gassolid two phases

as well as variation of temperature and moisture content for gassolid two phases in drying tubes having been considered in the said model. Solution of values has been carried out by using simulation software Simulink in Matlab

obtaining the drying curves of humid coal ash particles under different drying conditions of gas flow. The results of numerical simulation tallies well with experimental data

profing the accuracy of the said model.