Lateral solid mixing measurements in circulating fluidized beds

摘要: Abstract A thermal technique has been developed for measurement of solid mixing in fluidized beds. batch bed particles is preheated and then injected into the bed. An array thermistor probes measures spread tracer. series experiments done upper core region a 7 m tall, 0.20 diameter test circulating (CFB). The involved one type particle, having 180 μm 2350 kg/m 3 density. Models tracer particles, transfer heat from to surrounding gas thermistors were used make estimates radial particle diffusivity region. was on order 10 cm 2 /s range velocities concentrations tested. second set preliminary bottom 1.8 0.16 square CFB using 55 FCC (fluid cracking catalyst) particles. this region, although not representative strictly diffusional process, appears be somewhat more vigorous than