A SAMPLING METHOD TO DETERMINE THE TERMINAL VELOCITY AND SIZE DISTRIBUTION OF FLUIDIZED NANOPOWDER AGGLOMERATES
(0) The understanding of nanoparticle fluidization is hampered by the lack of in-situ techniques to characterize fluidized agglomerates.Although there are correlations to relate the properties of the fluidized bed, such as bed expansion, to the properties of the agglomerates, such as average size and density, the only method that can provide direct and in-situ information about size distribution and density of fluidized agglomerates is their direct visualization.Visualization techniques have two drawbacks: the agglomerate terminal velocity (needed to estimate the agglomerate density) cannot be determined unless the fluidization is suddenly stopped, and the processing of the recorded images is difficult.Currently, there exists no visualization technique to determine the size distribution and density of fluidized agglomerates in-situ and in a continuous way.In this work we introduce a novel device to overcome these challenges.We have designed a settling tube for sampling and in-situ visualization of fluidized agglomerates without the need of stopping the fluidization.The tube has been designed to facilitate the image analysis, increasing in this way the accuracy of the estimated size distribution and terminal velocity of the sampled agglomerates.
Lilian de Martín Javier Sánchez-Prieto Fernando Hernández-Jiménez J.Ruud van Ommen
Delft University of Technology,Julianalaan 136,2628 BL Delft,The Netherlands Universidad Carlos Ⅲ of Madrid,Av.de la Universidad,30,28911 Leganés,Madrid,Spain
国际会议
The 11th International Conference on Fluidized Bed Technology(CFB-11)(第十一届流化床技术国际会议)
北京
英文
55-60
2014-05-14（万方平台首次上网日期，不代表论文的发表时间）