Scaling in a circulating fluidized bed: particle concentration and heat transfer coefficient in a transport zone

Abstract

Similarity analysis of heat and mass transfer processes in circulating fluidized beds (CFB) which operate according to Catalytic Cracking CFB and CFB Combustor schemes is performed. On this basis the rules of transport processes scaling are formulated in the form of a system of dimensionless governing parameters. Particle concentration distribution and heat transfer coefficient in a transport zone of the riser with a height 6.6 m are studied experimentally. The obtained and literature data on the values of ρ and α c–c are generalized on the basis of the developed system of dimensionless groups.