Numerical Simulation of Fluidized Bed Refuse Incinerator

Abstract

A numerical three-dimensional simulation model of a fluidized bed refuse incinerator, which is based upon the lateral dispersion model and two-phase model, was developed. Separating refuse into three components, moistrure, ash and combustibles, combus tion characteristic was formulated by estimating the diameter of combustibles, ignition temperature and transition temperature from reaction to diffusion in the controlling region. Temperature distribution of the emulsion phase and oxygen concentration distribution in the fluidized bed from the calculation were compared with data obtained from the experiment. The calculated results coincided well with the experimental results. The method of modeling and basic and experimental equations in this model were confirmed to be accurately applicable to the numerical calculation. Moreover, the relation between the scale of the fluidized bed and the performance of the incinerator was discussed on the basis of simulation by the mathematical model.