Low-Rank Coal Drying TechnologiesCurrent Status and New Developments

被引：297

作者：

Karthikeyan, Muthusamy ^{[1
]}

Wu Zhonghua ^{[2
]}

Mujumdar, Arun S. ^{[2
]}

机构：

[1] Natl Univ Singapore, Dept Civil Engn, Singapore 117576, Singapore

[2] Natl Univ Singapore, Dept Mech Engn & Minerals, Met & Mat Technol Ctr M3TC, Singapore 117576, Singapore

来源：

DRYING TECHNOLOGY | 2009年 / 27卷 / 03期

关键词：

Blending; Coal drying; Heat treatment; Low-rank coal; Moisture content; Readsorption; Spontaneous combustion;

D O I：

10.1080/07373930802683005

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Despite their vast reserves, low-rank coals are considered undesirable because their high moisture content entails high transportation costs, potential safety hazards in transportation and storage, and the low thermal efficiency obtained in combustion of such coals. Their high moisture content, greater tendency to combust spontaneously, high degree of weathering, and the dusting characteristics restrict widespread use of such coals. The price of coal sold to utilities depends upon the heating value of the coal. Thus, removal of moisture from low-rank coals (LRC) is an important operation. Furthermore, LRC can be used cost effectively for pyrolysis, gasification, and liquefaction processes. This article provides an overview the diverse processesboth those that utilize conventional drying technologies and those that is not yet commercialized and hence in need of RD. Relative merits and limitations of the various technologies and the current state of their development are presented. Drying characteristics of low-rank coal as well as factors affecting drying characteristics of coal samples are also discussed.

引用

页码：403 / 415

页数：13

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