Experimental study and modeling of particle drying in a continuously-operated horizontal fluidized bed
Experimental study and modeling of particle drying in a continuously-operated horizontal fluidized bed作者机构：Thermal Process Engineering Otto-von-Guericke-University Universityatsplatz 239106 MagdeburgGermany Glatt Ingenieurtechnik GmbH Nordstrasse 12 99427 Weimar Germany
出 版 物：《Particuology》 (颗粒学报（英文版）)
年 卷 期：2017年第15卷第5期
页 面：134-146页
核心收录：
学科分类：08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学]
基 金：part of the project WIGRATEC+ the financial support from the German Federal Ministry of Science and Education (BMBF)
主 题：Continuous dryingHorizontal fluidized bed Residence time distribution Moisture content distributionPopulation balance
摘 要：Multistage fluidized beds are frequently used for product drying in industry. One advantage of these fluidized beds is that they can achieve a high throughput, when operated continuously. In this study, γ- A1203 particles were dried in a pilot-scale horizontal fluidized bed, without considering any comminution effects. For each experiment, the particle moisture content distribution and residence time distribution were determined. To take into account particle back mixing in our experiments, a one-dimensional pop- ulation balance model that considers particle residence time was introduced into a fluidized bed-drying model. Experimental particle residence time distributions were reproduced using a tank-in-series model. Subsequently, the moisture content distribution was implemented, as a second dimension to the popu- lation balance in this model. These two-dimensional simulations were able to describe the experimental data, especially the spread in the residual particle moisture distribution, much more accurately than one-dimensional simulations. Using this novel two-dimensional model, the effects of different operating parameters （process gas temperature, solid feed rate, superficial air velocity） on the particle moisture content distribution were systematically studied.
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