关键词: lateral dispersion coefficient;heated tracer particle;dense zone;circulating fluidized bed;dense zone

Abstract: Lateral solid mixing was investigated experimentally in the dense zone of a 900mm×100mm×
5.2m rectangular circulating fluidized bed riser. Using heated tracer injection, the
lateral solid dispersion was determined by measuring the temperature response at different
lateral positions. Furthermore, a one-dimensional dispersion model, which describes the
solid mixing in the dense zone, is presented. The experimental results were used to
determine the lateral particle dispersion coefficient under various operating conditions. A
correlation of dispersion coefficient with bed height, gas velocity, and particle size is
also proposed.

Key words: lateral dispersion coefficient, heated tracer particle, dense zone, circulating fluidized bed, dense zone