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首页> 外文期刊>Brazilian journal of chemical engineering >The effect of vibration on bed voidage behaviors in fluidized beds with large particles
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The effect of vibration on bed voidage behaviors in fluidized beds with large particles

机译：振动对大颗粒流化床中床空隙行为的影响

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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.
机译：在直径为148 mm的振动流化床中，使用光纤探针方法研究了振动参数，操作条件和材料性能对床空隙的影响。研究的变量包括频率（0-282 s-1），幅度（0 mm-1 mm），床高（0.1 m-0.4 m）以及四种颗粒（属于Geldart的B和D组）。将有振动的轴向和径向空隙分布与没有振动的轴向和径向空隙分布进行比较，这表明振动可以有助于颗粒的流化行为。对于较大的振幅，振动会严重影响床的空隙度。随着床层高度的增加，振动能量会减弱颗粒层。通过对实验数据的分析，提出了与实验数据吻合较好，偏差在±15％以内的床层空隙率的经验相关性。

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