Segregation by size difference in gas fluidized beds
Segregation by size difference in gas fluidized beds
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DOI：
10.1016/s0032-5910(98)00026-6
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发表时间：
1998-08
影响因子：
5.2
通讯作者：
Shu-Yii Wu;J. Baeyens
中科院分区：
文献类型：
--
作者：
Shu-Yii Wu;J. Baeyens
不同尺寸但相同密度的颗粒的二元系统在带有多孔板分配器的直径 30 厘米的床中流化。这项工作描述了广泛的实验，并将混合/分离特性与可见气泡流速、颗粒尺寸比和其他影响较小的参数联系起来。实验数据表示为混合指数，与决定性参数相关。还包括与先前混合指数经验方程的比较。避免宽粒度分布粉末流化床中偏析所需的过量气体流量可以根据混合指数的表达式计算（方程（15））。
Binary systems of particles of different size but equal density are fluidized in a 30-cm diameter bed with a perforated plate distributor. This work described the extensive experimentation, and relates the mixing/segregation properties to the visible bubble flow rate, the particle size ratio, and other parameters of minor influence. Experimental data are expressed as mixing index, correlated in terms of the decisive parameters. Comparison with previous empirical equations for the mixing index is also included. The excess gas flow rate required to avoid segregation in a fluidized bed of wide size distribution powders can be calculated from the expression for the mixing index (Eq. (15)).