Minimum fluidization velocity of particles with different size distributions at elevated pressures and temperatures
Minimum fluidization velocity of particles with different size distributions at elevated pressures and temperatures
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不同粒径分布的颗粒在高温高压下的最小流化速度
DOI：
10.1016/j.ces.2020.115555
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发表时间：
2020
影响因子：
4.7
通讯作者：
Aibing Yu
中科院分区：
文献类型：
--
作者：
Yingjuan Shao;Zhaozhi Li;Wenqi Zhong;Zhoufeng Bian;Aibing Yu
本文详细研究了压力、温度和粒度分布 (PSD) 对最小流化速度 (Umf) 的影响。在实验室规模的加压流化床反应器上，在0.1~0.5MPa压力、300~850℃温度下，对三种窄PSD和三种宽PSD（二元、均匀、高斯型）硅砂颗粒进行了一系列Umf测量。结果表明，Umffor窄PSD和宽PSD均随温度升高而降低，并随压力升高而略有降低。此外，高斯型混合物具有与参考窄PSD粒子几乎相同的Umfas，而二元和均匀PSD混合物的Umfof比这两者大。基于实验数据，开发了一种新的简单关系，用于预测高压和高温下不同 PSD 颗粒的 Umf。
This paper presents a detailed investigation into the effect of pressure, temperature and particle size distribution (PSD) on the minimum fluidization velocity (Umf). A series of measurement of Umfwere carried out under the pressure from 0.1 MPa to 0.5 MPa and the temperature from 300 °C to 850 °C on a lab-scale pressurized fluidized bed reactor for three narrow PSD and three wide PSD (binary, uniform, and Gaussian-type) silica sand particles. The results showed that the Umffor narrow and wide PSDs both decreased with increasing temperature and decreased slightly with rising pressure. Besides, the Gaussian-type mixtures had almost the same Umfas the reference narrow PSD particle, while the Umfof binary and uniform PSD mixtures was larger than these two. Based on the experimental data, a new simple relationship for predicting Umfof the different PSD particles at elevated pressures and temperatures was developed.