Experimental and numerical simulation studies of the fluidization characteristics of a separating gas-solid fluidized bed
Experimental and numerical simulation studies of the fluidization characteristics of a separating gas-solid fluidized bed
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DOI：
10.1016/j.fuproc.2010.08.004
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发表时间：
2010-12-01
影响因子：
7.5
通讯作者：
Duan, Chenlong
中科院分区：
文献类型：
--
作者：
Zhao, Yuemin;Tang, Ligang;Duan, Chenlong
采用实验与数值相结合的方法，对0 ~ 0 ~ 15 mm大的Geldart B磁铁矿粉进行了流体动力学研究，优化了流化床所用固体介质的设计。结果表明，Syamlal-O Brien阻力模型适用于该流化床的模拟，并验证了模拟结果与实验结果的一致性静态床层高度不超过300毫米的床层高度最小影响流化特性随着表面气体速度的增加床上活动是改善但是同时床的均匀性和稳定性下降因此气体速度应调整不超过2 OU (mf)的密度Geldart B床均匀和稳定显示一个相对较高的流化质量而且复合介质固体组成的
Gas-solid fluidized bed separation expands the choices of highly efficient dry coal beneficiation methods The hydrodynamics of 0 3-0 15 mm large Geldart B magnetite powder were studied using a combination of experimental and numerical methods to optimize the design of the solid medium used in the fluidized bed The results show that the Syamlal-O Brien drag model is suitable for simulating the bed and it is verified that simulated and experimental results are consistent with each other If the static bed height is no more than 300 mm then the bed height has minimal effect on the fluidization characteristics As the superficial gas velocity increases the bed activity is improved However at the same time the uniformity and stability of the bed drop Therefore the gas velocity should be adjusted to no more than 2 OU(mf) The density of the Geldart B bed is uniform and stable which indicates a relatively high fluidization quality Furthermore compounded medium solids consisting of