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首页> 外文会议>Proceedings of the 11th International Conference on Fluidized Bed Technology >DUAL-MATERIAL PROBE MEASUREMENT OF ELECTROSTATIC CHARGES AND HYDRODYNAMICS IN GAS-SOLID FLUIDIZED BEDS
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DUAL-MATERIAL PROBE MEASUREMENT OF ELECTROSTATIC CHARGES AND HYDRODYNAMICS IN GAS-SOLID FLUIDIZED BEDS

机译：气固流化床中静电电荷和水动力的双材料测量

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摘要

A custom-made dual-material probe was used to measure electrostatic charge on glass beads in a cylindrical Plexiglas column of inner diameter 0.1 m and height 1.0 m.Current signals measured by the probe in fluidized beds are strongly affected by local hydrodynamics.Raw electrostatic signals from the probe were examined at different superficial gas velocities.The amplitudes of current peaks, as well as peak frequencies, increased with increasing gas velocity.There were differences in peak heights between the two materials.Statistical and Fast Fourier Transformation analyses suggest that the current signals are strongly influenced by the hydrodynamics and charge density inside the bed.Decoupled charge densities determined by the probe are of the same order of magnitudes and showed consistent trends with those measured by the Faraday cup method.
机译：使用定制的双材料探针在内径为0.1 m，高度为1.0 m的圆柱形有机玻璃柱中测量玻璃珠上的静电荷。在流化床中，该探针测得的电流信号受局部流体动力学的强烈影响。在不同的表观气体速度下检查了来自探头的信号。电流峰值的幅度以及峰值频率随着气体速度的增加而增加。两种材料之间的峰高存在差异。统计和快速傅里叶变换分析表明电流信号受床内流体动力学和电荷密度的强烈影响。由探头确定的去耦电荷密度具有相同的数量级，并且与法拉第杯法测量的趋势一致。

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