快速流化床中颗粒浓度及颗粒速度的径向分布 |
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引用本文: | 白丁荣 金涌. 快速流化床中颗粒浓度及颗粒速度的径向分布[J]. 化学工程, 1991, 19(5): 5-12,21 |
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作者姓名: | 白丁荣 金涌 |
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作者单位: | 清华大学化学工程系,清华大学化学工程系,清华大学化学工程系,清华大学化学工程系 |
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摘 要: | 本文在φ140mm的气固并流下行快速流化床中,研究了颗粒浓度及颗粒速度的径向分布随操作气速、颗粒循环速率以及床层轴向位置的变化规律。并探讨了颗粒质量通量的径向分布及颗粒流动的均匀性,表明在相同操作条件下,下行快速流化床中气固流动远比上行快速流化床均匀。
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关 键 词: | 颗粒浓度分布 颗粒速度分布 颗粒通量分布 气固两相流快速流化床 |
RADIAL SOLID CONCENTRATION AND VELOCITY PROFILES IN A FAST FLUIDIZED BED |
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Abstract: | The regularities of radial solid concentration and velocity profile changing with the operating gas velocity,solid Particles circulating rate and different axial positions are investigated in a gas-solid cocurrent downward fast fluidized bed(CDFFB)with a diameter of 140mm. the radial solid mass flux profile and the uniformity of solid flow are also studied. The results show that the gas-solid flow in the CDFFB is much more uniform than that in a upward fast fluidized bed(UFFB). |
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