Abstract As most classical fluidization technologies, Circulating Fluidized Beds (CFB) are widely employed in chemical and physical operations. However, CFB Reactors still have some disadvantages such as the non-uniform solid particles distribution and the backflow of the solid particles near the wall, which deteriorate the system mixing, and lead to low system conversion/heat and mass transfer rate. To improve the CFB performance, we propose in the current work to study the effect of the ring baffle configuration on the fluidization system hydrodynamics using a multifluid Eulerian CFD model, incorporating the Kinetic Theory of Granular Flow. In this approach, two different types of ring baffles, circular and trapezoidal, were considered and the corresponding results were compared. The results revealed that the incorporation of ring baffles improved the system mixing and reduced the backflow near the wall. Nevertheless, the shape of baffles had a limited impact on the system hydrodynamics.

中文翻译：

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Geldart B颗粒折流循环流化床数值模拟

摘要 作为最经典的流化技术，循环流化床（CFB）被广泛应用于化学和物理操作。然而，CFB反应器仍存在固体颗粒分布不均匀、靠近壁面的固体颗粒回流等缺点，使系统混合恶化，导致系统转化率/传热传质率低。为了提高 CFB 性能，我们在当前的工作中建议使用多流体欧拉 CFD 模型研究环形挡板配置对流化系统流体动力学的影响，并结合颗粒流动力学理论。在这种方法中，考虑了两种不同类型的环形挡板，圆形和梯形，并比较了相应的结果。结果表明，环形挡板的加入改善了系统混合并减少了靠近壁的回流。然而，挡板的形状对系统流体动力学的影响有限。