论文和技术资料

Clustering is a common hydrodynamic characteristic observed among suspended gas-solid particles in a fast fluidized bed (FFB) regime of a circulating fluidized bed (CFB) system. In this paper clustering behavior has been studied with Geldart group B particles like coal and iron ore in a circulating fluidized bed of diameter 0.1016 m and height 5.62 m. The cluster size when calculated from the homogeneous suspension model seems to match the measured data when the particle concentration in the suspension lies mostly in the dilute phase. The result of the present study gives a thorough understanding of the FFB. The complex relation between the continuous and disperse phase onto the suspended particles can be modeled using hydrodynamics i.e., momentum, heat and mass transfer and the reaction module which describes the homogeneous gas phase reactions. These modules give rise to a multi-scale model for a particular clustering process which can be solved using COMSOL Multiphysics and MATLAB(The MathWorks, Inc.) software.