The flow pattern of a fluidized bed is a key factor for heat transfer and new reactor *** flow pattern of the gas-solid fluidized bed was experimentally measured by a novel acoustic emission(AE)*** acoustic energy gen...
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The flow pattern of a fluidized bed is a key factor for heat transfer and new reactor *** flow pattern of the gas-solid fluidized bed was experimentally measured by a novel acoustic emission(AE)*** acoustic energy generated by the collision of solids particles on the reactor wall or in the local space is a reflection of the speed and frequency of collision,and consequently the flow pattern of *** flow pattern of polyethylene particles with the average size 460 μm in a 150 mm fluidized bed in the range of superficial gas velocity from 0.3 m·s-1 to 0.7 m·s-1 was multi-circulation pattern with main-circulation zone,sub-circulation zone and stagnant *** multi-circulation flow pattern would transit to the single circulation flow pattern if superficial gas velocity exceeded 0.8 m·s-1 or average particle size decreased to below 365 μ*** height of stagnant zone remained unchanged with the increase of static bed *** was also found that the type of the distributor had an evident effect on flow *** single circulation flow pattern in the fluidized bed with a perforated stainless steel plate distributor would change to the multi-circulation flow pattern for the same particles and the same fluidized bed with a cone-shaped *** empirical equation calculating the height of stagnant zone was presented and the experimental data could be correlated with the empirical equation with fairly good accuracy.
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