Abstract

The fluidized bed has been widely applied in different industrial processes because of its inherent advantages like excellent heat and mass transfer and mixing. In the Fluid Coking^TM process, wet agglomerates carry the unreacted liquid to the stripper, which causes fouling and decreases the efficiency. The cumulative distribution of the formation-to-stripper time for wet agglomerates or particles is a very vital factor in the performance of fluidized bed reactor. A novel method based on the Eulerian-Eulerian approach was applied in the bubbling fluidized bed to track the particle travel time. In addition, the effects of design parameters (gas distributors and baffles) and operating conditions (superficial gas velocity) on the particle travel time in a bubbling fluidized bed were investigated. The results show that the particle travel time can be increased by either a baffle with a fluxtube or a modified gas distributor.

中文翻译：

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使用 TFM 方法研究鼓泡流化床中的固体混合。Part I. 粒子传播时间分布

摘要

流化床以其优良的传热、传质和混合等先天优势，在不同的工业过程中得到了广泛的应用。在流体焦化^TM 在此过程中，湿团聚体将未反应的液体带到汽提塔，这会导致结垢并降低效率。湿团聚体或颗粒的形成到汽提器时间的累积分布是流化床反应器性能的一个非常重要的因素。在鼓泡流化床中应用了一种基于欧拉-欧拉方法的新方法来跟踪粒子的传播时间。此外，还研究了设计参数（气体分布器和挡板）和操作条件（表观气体速度）对鼓泡流化床中颗粒传播时间的影响。结果表明，粒子传播时间可以通过带有通量管的挡板或改进的气体分布器来增加。