Experimental spray zone characterization in top-spray fluidized bed granulation

摘要: Abstract In fluidized bed granulation wetting and coating of particles depends on the atomization a liquid binder agent. Droplet distribution subsequent micro-scale processes droplet deposition particle surfaces as well drying layers bonds between aggregated lead to subdivision process space into two major compartments, spray zone zone. By using self-constructed, simple conductivity probe patterns inside are located. The spatial demarcation which is dependent fluidization conditions, deduced. Particularly, nozzle height gas flow rates influence expansion its intrusion bed. presented results show by means residence time for considered compartments that an increased mass rate leads significantly accelerated in zone, velocity forces faster re-circulation behavior entire Consequently, reduced. flat with rectangular cross section combination image-based acquisition techniques, velocities solid volume fractions have been acquired. Comparing circulation data obtained cylindrical equipment shows information can be transferred from quasi-2D configuration real 3D geometries.