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The internally circulating fluidized bed (ICFB): A novel solution to gas bypassing in spouted beds

1992; Wiley; Volume: 70; Issue: 5 Linguagem: Inglês

10.1002/cjce.5450700512

1939-019X

Bruce J. Milne, Franco Berruti, Leo A. Behie, T J W de Bruijn,

Cyclone Separators and Fluid Dynamics

Abstract The bypassing of a portion of the inlet spout gas to the annular region of spouted and spout‐fluid beds can have a critical effect on processes requiring accurate control of the spout gas residence time even when a draft tube is utilized. A modification to the spout‐fluid bed with draft tube called the Internally Circulating Fluidized Bed or ICFB is proposed which eliminates this bypassing problem. Experiments were conducted on a cold 20 cm diameter semi‐cylindrical unit to define the operational characteristics of the ICFB with particular emphasis on the gas and solids flow behavior. The solids and gas flow rates in the unit were successfully related by a published correlation which was developed for the cocurrent flow of gases and solids through orifices.