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Abstract�� Hydrodynamics of gas flow of cocurrent downflow of gas-solid mixture was investigated in a downcomer of 110mm ID equipped in a circulating Fluidized Bed by means of tracer gas technique with helium gas for two kinds of particle. A new gas flow equation deduced from the analysis of the interaction beween gas and solid was given. The predicted results of this equation were in good agreement with experimental data.

Keywords�� s: circulating fluidized bed;downcomer;tracer gas technique; gas flow

Received 1995-07-15;

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��ڱ��٣��.ѭ��Ϲ��ʵ��о��򩤩��[J]. ��ѧ��ҵ�빤��, 1995,12(3): 20-24

Dong Zhongbing;Zhao Lianzhong;Yang Guilin.The Gas-Solid Flow in Downcomer of Circulating Fluidized Bed�򩤩�Gas Flow[J]. Chemcial Industry and Engineering, 1995,12(3): 20-24