Simulation and experiment of segregating/mixing of rice husk–sand mixture in a bubbling fluidized bed
Simulation and experiment of segregating/mixing of rice husk–sand mixture in a bubbling fluidized bed
复制标题
DOI：
10.1016/j.fuel.2004.09.026
复制
发表时间：
2005-10
期刊：
影响因子：
7.4
通讯作者：
Sun Qiaoqun;L. Huilin;Liu Wentie;He Yurong;Yang Lidan;D. Gidaspow
中科院分区：
文献类型：
--
作者：
Sun Qiaoqun;L. Huilin;Liu Wentie;He Yurong;Yang Lidan;D. Gidaspow
对稻壳-砂混合物在鼓泡流化床中的流态化行为进行了实验和理论研究。讨论了谷壳-砂混合物的压降分布与其最小流化速度定义的相关性，确定了谷壳-砂二元混合物的最小流化速度。测定了稻壳颗粒质量分数沿层高的分布，确定了混合颗粒平均粒径的分布规律。从颗粒流动动力学理论出发，建立了多流体气固流动模型。为每一类粒子构建了单独的输运方程，允许粒子之间的相互作用，以及动量和能量在各自的类和载气之间交换。预测了稻壳颗粒质量分数和二元混合物平均粒径的分布。对数值计算结果进行了分析，并与实验数据进行了比较。
The fluidization behavior of rice husk–sand mixture in the gas bubbling fluidized bed is experimentally and theoretically studied. The relevancy of the pressure drop profile of rice husk–sand mixture to the definition of its minimum fluidization velocity is discussed, and the minimum fluidization velocity of rice husk–sand binary mixture is determined. The distributions of mass fraction of rice husk particles along the bed height are measured, and the profiles of the mean particle diameter of mixture are determined. A multi-fluid gas–solid flow model is presented where equations are derived from the kinetic theory of granular flow. Separate transport equations are constructed for each of the particle classes, allowing for the interaction between particle classes, as well as the momentum and energy are exchanged between the respective classes and the carrier gas. The distributions of the mass fraction of rice husk particles and the mean particle diameter of binary mixture are predicted. The numerical results are analyzed, and compared with experimental data.