Fluid Dynamics of Vibrofluidized Beds during the Transient Period of Water Evaporation and Drying of Solutions
Fluid Dynamics of Vibrofluidized Beds during the Transient Period of Water Evaporation and Drying of Solutions
复制标题
DOI：
10.1002/ceat.201200147
复制
发表时间：
2012-10
影响因子：
2.1
通讯作者：
L. Meili;F. B. Freire;M. C. Ferreira;J. Freire
中科院分区：
文献类型：
--
作者：
L. Meili;F. B. Freire;M. C. Ferreira;J. Freire
本文研究了振动数r、振幅A和振动频率f对惰性颗粒振动流化床在不同溶液的水分蒸发和干燥过渡过程中流体动力学行为的影响。调查的解决方案是污水污泥，脱脂牛奶，碳酸钙的三种不同的固体含量。确定了进料速率和振动参数对压降和进气速度等变量动态行为的影响。结果表明，在A = 0.015 m时操作改善了湿床的床层动力学特性和气粒接触。由于在相同的Γ值下可以获得不同的动态特性，因此必须将A或f的值与Γ一起通知，以完整地表征振动效应。
The influence of vibration number Γ, amplitude A, and frequency of vibration f on the fluid dynamic behavior of a vibrofluidized bed operating with inert particles in the transient period of water evaporation and drying of different solutions was evaluated. The solutions investigated were sewage sludge, skimmed milk, and calcium carbonate of three different solids contents. The impact of feed rate and vibration parameters on the dynamic behavior of variables such as pressure drop and inlet air velocity was determined. Based on the results it was verified that the operation at A = 0.015 m improved the bed dynamics and the gas-particle contact in the wetted beds. As different dynamic behaviors may be obtained under the same Γ value, the values of A or f must be informed together with Γ for a complete characterization of vibration effects.