In superheated steam fluidized bed drying,the operation pressure significantly influences the heat and mass transfer and the steam-particle two-phase flow with nonlinear characteristics.Base on the two-dimensional unsteady model of drying process of rapeseeds,numerical simulation was carried out to investigate the influence of operation pressure on the kinetics of superheated steam fluidized bed drying.Under negative pressure,near atmospheric pressure and high pressure,the relationship between the operation...