The Study On The Distributor Of Liquid-Solid Fluidized Bed Heat Exchanger

On the basis of investigations of plenty of literatures about the liquid-solid fluidized bed heat exchanger, the important task of this paper is on the basis of computational fluid dynamics, from the full governing equations of the fluid mechanism, founded on the finite volume method (FVM), used the famous software FLUENT to make the simulations and theoretical works on some aspects of the liquid-solid fluidized bed, the liquid-solid fluidized bed heat exchanger with single tube and the experimental facility of liquid-solid fluidized bed heat exchanger.By the simulations of the liquid-solid fluidized bed, the velocity profiles of particles and the axial distributions of solid holdups are made. It shows that the numerical results of the flow field agree well with the experiment data through comparison.By analyzing the stability of the liquid-solid fluidized bed heat exchanger with single tube, the factors which influence the stability are discussed by using ten non-dimensional parameters, they are v~* , u~*, ε, n, ρ_p~*, D~* , ζ, Fr, Re and e/D. The system tends to be more stable with parameters v~*, ε, ζ and e/D increased or parameters u~*, D~*, ρ_p~* and Fr decreased. The parameters n and Re have no obvious influence to the stability of the system.By the simulations of the experimental facility of liquid-solid fluidized bed heat exchanger, the velocity and solid holdups profiles of the particles are made with no distributions and the different cone angles of the distributor tube. The velocity irregularity is used to describe the degree of uniformity of particles velocity fields.