Analysis of Particle Flow in an Internally Circulating Fluidized Bed Having Several Chambers

Abstract

Particle flow was analyzed, in an internally circulating fluidized bed having several chambers, in which solid circulation rate was controlled by changing gas velocity supplied to each chamber. Solid circulation rate in a 4 MWth test plant for an internally circulating fluidized bed gasifier (ICFG) was predicted fairly well from experimental data for 1/1 scale ratio cold model. The solid circulation rate in an internally circulating fluidized bed is affected by the particle plunge by splash, the restricted resistance at the opening and the bed viscosity around the opening. Based on the pressure balance around an opening, a mathematical model to predict solid mass flow rate was developed. The model developed in this paper was well validated by the observed values of ICFG hot model test data.