A novel reactor named gas-driven inverse liquid-solid fluidized bed (GDFB) was developed in this research. It adopts gas as the driving force to benefit chemical processes requiring minimum liquid flow. The column is divided into a riser section for upward gas flow and a downer section as the main fluidized bed for light particles. The inverse fluidization occurs in the downer, where hydrodynamics and their influencing factors were studied. In the solid-baffle system, four fluidization regimes were observed, including the packed bed, semi-fluidized bed, fully-fluidized bed, and circulating bed. Moreover, the meshed-baffle system possesses some distinct characteristics, and the shifted bed regime was found between the fully-fluidized bed and the circulating bed.

中文翻译：

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气体驱动的逆液固流化床的流体力学

在这项研究中开发了一种名为气体驱动的逆液固流化床 (GDFB) 的新型反应器。它采用气体作为驱动力，有利于需要最小液体流量的化学过程。该塔分为用于向上气流的提升段和作为轻颗粒主要流化床的下行段。逆流化发生在下层，研究了流体动力学及其影响因素。在固体挡板系统中，观察到四种流化状态，包括填充床、半流化床、全流化床和循环床。此外，网状挡板系统具有一些明显的特点，在全流化床和循环床之间发现了移动床制度。