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首页> 外文期刊>Minerals Engineering >The distribution of bed density in an air dense medium fluidized bed with single and binary mixtures of Geldart B and/or D particles
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The distribution of bed density in an air dense medium fluidized bed with single and binary mixtures of Geldart B and/or D particles

机译:空气密集介质流化床中的床密度分布,具有Geldart B和/或D颗粒的单和二元混合物

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摘要

The distribution of bed density in an Air Dense Medium Fluidized Bed (ADMFB) with single and binary mixtures of solid particles was investigated for dry coal beneficiation. The effects of particle properties, superficial gas velocity, and mixture composition on the axial distribution of fluidized bed density were examined. A lower density region at the bottom of the fluidized bed with single particles has been observed, whereas the bed density at the upper part remains almost consistent. The increasing excess gas velocity does not change this trend although decreasing the overall bed density, however the binary mixtures of solid particles can be used to balance this non-uniform density distribution. A new equation has been derived to predict the bed density distribution, considering particle properties and fluidization characteristics. This correlation successfully accounts for the estimation of density distribution in ADMFB involving both single and binary mixtures of Geldart B and/or D particles.
机译:研究了空气致密介质流化床(ADMFB)中的床密度分布,具有单颗粒和二元混合物的固体颗粒,用于干煤矿。检查颗粒性,浅表气体速度和混合组合物对流化床密度轴向分布的影响。已经观察到具有单个颗粒的流化床底部的较低密度区域,而上部的床密度几乎保持一致。虽然降低总床密度,但增加过量的气体速度不会改变这种趋势,但是固体颗粒的二元混合物可用于平衡该不均匀密度分布。考虑到颗粒性能和流化特性,得到了预测床密度分布的新方程。这种相关性成功地估计涉及Geldart B和/或D颗粒的单一和二元混合物中的ADMFB中密度分布的估计。

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