Drying of Low-Rank Coals: A Review of Fluidized Bed Technologies

被引:56
作者
Si, Chongdian [1 ,2 ]
Wu, Jianjun [1 ]
Wang, Yong [1 ]
Zhang, Yixin [1 ]
Shang, Xiaoling [1 ]
机构
[1] China Univ Min & Technol, Natl Engn Res Ctr Coal Preparat & Purificat, Key Lab Coal Proc & Efficient Utilizat, Minist Educ, Xuzhou 221008, Peoples R China
[2] Jining Univ, Key Lab Inorgan Chem Univ Shandong, Qufu, Peoples R China
基金
高等学校博士学科点专项科研基金;
关键词
Additional field assistance; Drying; Fluidized bed; Low-rank coals; CHEMICAL-STRUCTURE CHANGES; BROWN-COAL; PHYSICOCHEMICAL PROPERTIES; SUPERHEATED STEAM; CHINESE LIGNITE; PORE STRUCTURE; POWER-PLANT; MICROWAVE; ENERGY; TEMPERATURE;
D O I
10.1080/07373937.2014.952382
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The high moisture content of low-rank coals is a matter of concern in many areas, creating high transportation costs, potential safety hazards in transportation and storage, and the low thermal efficiency obtained in conversion processes. It is important to reduce this moisture content to acceptable limits in order to decrease energy losses, transportation costs, and to increase product quality. Drying characteristics, chemical structure change, and energy consumption of low-rank coals as well as the affecting factors are discussed. This article represents a review of conventional fluidized bed drying technologies and additional field-assisted fluidized bed drying technologies, such as microwave, vibration, agitation, and acoustic field. Relative merits and limitations of the various additional fluidized bed drying technologies and the current state of their development are presented. Some of the unresolved problems are identified and directions for further research are suggested.
引用
收藏
页码:277 / 287
页数:11
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