Based on a self‐established cold‐flow experimental device, the pressure drop in a cocurrent downflow three‐phase moving bed was investigated under a wide range of gas, liquid, and solid flow rates during dynamic and steady‐state operation. The results showed that for the startup of the bed, since the first bed layer packed by fall‐falling of particles had lower voidage, it would take at least one bed volume time to make the voidage in the bed reach the steady‐state. Under steady‐state conditions, the pressure drop increased with the increase of gas and liquid mass flow rates, liquid viscosity, and decreased with the increase of solid flow rate. Furthermore, it was found that the liquid distribution became more uniform due to particle movement. The experimental data obtained in this study was used to develop a correlation to predict the pressure drop in a three‐phase moving bed with an average relative error of 9.32%.

中文翻译：

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并流下流三相移动床中压降的研究

基于自行建立的冷流实验装置，在动态和稳态运行期间，在多种气体，液体和固体流速下，对并流下流三相移动床中的压降进行了研究。结果表明，对于床的启动，由于通过颗粒下落而堆积的第一层床具有较低的空隙率，因此至少需要一个床体积的时间才能使床中的空隙率达到稳态。在稳态条件下，压降随气体和液体质量流量，液体粘度的增加而增加，而随固体流量的增加而降低。此外，发现由于颗粒运动，液体分布变得更均匀。