The effect of vibration on bed voidage behaviors in fluidized beds with large particles

Brazilian Journal of Chemical Engineering

H. Jin²  J. Zhang¹  B. Zhang¹ 

[1] ,Beijing Institute of Petrochemical Technology School of Materials and Chemical Engineering Beijing,China

关键词: Vibrating fluidized beds;    Voidage;    Vibration intensity;   

DOI  :  10.1590/S0104-66322007000300008

来源: SciELO

【 摘 要 】

The effects of vibration parameters, operating conditions and material properties on bed voidage were investigated using an optical fiber probe approach in a vibrating fluidized bed with a diameter of 148 mm. Variables studied included frequency (0-282 s-1), amplitude (0 mm-1 mm), bed height (0.1 m-0.4 m) as well as four kinds of particles (belonging to Geldart's B and D groups). The axial and radial voidage distribution with vibration is compared with that without vibration, which shows vibration can aid in the fluidization behaviors of particles. For a larger vibration amplitude, the vibration seriously affects bed voidage. The vibration energy can damp out for particle layers with increasing the bed height. According to analysis of experimental data, an empirical correlation for predicting bed voidage, giving good agreement with the experimental data and a deviation within ±15%, was proposed.

【 授权许可】

CC BY   
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