Hydrodynamic characterization of the biomass combustion in a pilot scale fluidized bed combustor

Hydrodynamics of fluidized bed combustors may be optimized promoting the establishment of "Gulf Stream" circulation patterns of fluidized particles to contrast the self-segregation of high-volatile fuel particles during devolatilization. The present study is aimed at characterizing bed hydrodynamics in a pilot scale fluidized bed combustor revamped to optimize combustion of high-volatile solid fuels. Time-resolved pressure signals measured at different locations in the bed and in the plenum were analyzed in the time and frequency domains. Results were compared with qualitative characterization of fluidization patterns by visual observation of the bed surface.