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首页> 外文期刊>Chemical Engineering and Processing >Intensification of the density stability in the air dense medium gas–solid fluidized bed based on a binary dense media
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Intensification of the density stability in the air dense medium gas–solid fluidized bed based on a binary dense media

机译：基于二元致密介质的空气密集介质气固流化床中的密度稳定性强化

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Graphical abstractDisplay OmittedHighlights?A binary dense media was proposed to intensify the fluidization quality of ADMGFB.?Density stability and uniformity of ADMGFB was experimentally investigated.?Appropriate operational factors were determined to intensify the density stability.?A reliable mathematical model was established to predict and adjust bed density.?Notable intensification of the separation process for coal cleaning was achieved.AbstractIntensification of the density stability in the air dense medium gas?solid fluidized bed is significantly important to the separation efficiency of this density-based separator. A binary dense media composed of the magnetite powder and quartz sand was used to achieve the intensification of the density stability. The fluctuation characteristics of the bed pressure gradients were investigated to seek for the optimum composition of binary dense media. The weight proportion of quartz sand in the binary dense media should not exceed 30%. The stability and uniformity of the bed density along the axial and radial directions of fluidized bed were experimentally investigated. The results indicated that the weight proportion of quartz sand should be controlled within 10%–20%, and the fluidization number should be adjusted from 1.5 to 1.6. A reliable mathematical model was established to predict the bed density. The calculation and measurement results agreed well, which validated the prediction accuracy. With a 10% weight proportion of quartz sand, the ash content of ?13+6mm sized coal was decreased from 33.35% to 11.55% with a clean coal yield of 69.48% at a fluidization number of 1.6. A satisfactory probable error value of 0.095g/cm3indicated notable separation performance.]]>
机译：<！[cdata [ 图形抽象 显示省略 突出显示 ？ 提出了二进制密集介质以加强ADMGFB的流化质量。 ？ 密度稳定性和admgfb的均匀性是实验盟友调查。 ？ 确定适当的运行因素，以加强密度稳定性。 ？< / ce：标签> 建立了可靠的数学模型以预测和调整床密度。 ？ 实现了煤炭清洁分离过程的显着强化。 抽象 强度稳定的强化空气密集的介质气体？固体流化床对于该密度基分离器的分离效率显着重要。使用由磁铁矿粉末和石英砂组成的二元致密介质来实现密度稳定的强化。研究了床压梯度的波动特性，寻求最佳二元致密介质的最佳组成。二元致密介质中石英砂的重量比例不应超过30％。实验研究了沿着流化床的轴向和径向方向的床密度的稳定性和均匀性。结果表明，石英砂的重量比例应在10％-20％以内控制，流化数应从1.5到1.6调节。建立了可靠的数学模型来预测床密度。计算和测量结果达成良好，验证了预测准确性。含有10％重量比例的石英砂，粉煤灰含量为13 + 6mm尺寸煤的33.35％降至11.55％，在流化的数量为1.6时，清洁煤收益率为69.48％。令人满意的可能误差值为0.095g / cm：sup loc =“post”> 3 表示值得注意的分离性能。 ]]>

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