In a gas–solid fluidized bed with hydrocarbon liquid spray, a liquid-affected zone (cloudy zone) and a gas–solid zone (non-cloudy zone) coexist. Fine particles with different diameters are injected and shuttle between the two zones to simulate the motion of growing catalyst particles in an industrial fluidized bed reactor. The movement and distribution patterns of the fine particles are investigated via high-speed image and infrared image approaches developed. The probability density based on the coordinates of fine particles reflects clearly the distribution characteristics of fine particles in the bed at different times. Fine particles with smaller diameters are more easily enriched locally during the injection and diffusion process. Moreover, the proportion of fine particles in the cloudy zone to the total fine particles increases with the diameter of fine particles.

中文翻译：

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烃类液体喷雾注入气固流化床中细颗粒的分布和运动


在烃类液体喷雾的气固流化床中，液体影响区（浑浊区）和气固区（非浑浊区）共存。不同直径的细颗粒被注入并在两个区域之间穿梭，以模拟工业流化床反应器中生长的催化剂颗粒的运动。通过开发的高速图像和红外图像方法研究细颗粒的运动和分布模式。基于细颗粒坐标的概率密度清晰地反映了不同时刻床层中细颗粒的分布特征。直径较小的细颗粒在注入和扩散过程中更容易局部富集。而且，浑浊区的细颗粒占细颗粒总数的比例随着细颗粒直径的增大而增大。