Experimental and numerical simulation of drying of lignite in a microwave assisted fluidized bed

被引：23

作者：

Si, Chongdian ^{[1
,2
]}

Wu, Jianjun ^{[2
]}

Zhang, Yixin ^{[2
]}

Liu, Guangjun ^{[1
]}

Guo, Qingjie ^{[3
]}

机构：

[1] Jining Univ, Shandong Engn Res Ctr Chem Intermediate, Qufu 273155, Peoples R China

[2] China Univ Min & Technol, Natl Engn Res Ctr Coal Preparat & Purificat, Xuzhou 221008, Jiangsu, Peoples R China

[3] Ningxia Univ, Coll Chem & Chem Engn, State Key Lab High Efficiency Coal Utilizat & Gre, Yinchuan 750021, Peoples R China

来源：

FUEL | 2019年 / 242卷

基金：

中国国家自然科学基金;

关键词：

Lignite drying; Mathematical modeling; Heat transfer coefficient; Microwave-assisted fluidized bed; HEAT-TRANSFER; KINETICS; COAL;

D O I：

10.1016/j.fuel.2019.01.002

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The characteristics of lignite drying in a microwave fluidized bed were simulated using Fluent software based on Euler-Euler flow model. The simulation results fitted the experimental data reasonably well. The results showed that the fluidization quality and drying rate of lignite increased with an increase of microwave power and air temperature. Along with the drying process, the predicted value of lignite moisture content was slightly smaller than the experimental value. The hydrodynamics and heat transfer coefficients of lignite microwave drying in a fluidized bed were investigated on the basis of simulation results. The difference of solid volume fraction is identified although a good agreement is obtained the experiment. The heat transfer coefficients increased with the increasing of microwave power, air temperature and air velocity, while decreased with the increasing of drying time.

引用

页码：149 / 159

页数：11

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