THERMAL SCIENCE

International Scientific Journal

INFLUENCE OF GEOLOGICAL VARIATIONS ON LIGNITE DRYING KINETICS IN SUPERHEATED STEAM ATMOSPHERE FOR BELCHATOW DEPOSIT LOCATED IN THE CENTRAL POLAND

ABSTRACT
Lignite-fired coal power plants suffer from a significant heat loss due to the high moisture content in this energy carrier. Water removal from fuel is an indispensable treatment for improving the combustion process, which will foster the efficient utilization of lignite. Superheated steam fluidized bed drying is expected for this purpose in a power generation sector. Understanding drying kinetics of lignite will greatly reinforce design process of a dryer. Physical features as well as the drying behaviour may be divergent among the lignite originated from different depths and positions in a certain mine. To reveal and clarify the influence of the geological features, the drying characteristics of several grades of lignite from the Belchatow mine in Poland were investigated. The attempts to clarify the influence of the divergent properties of the investigated samples on the drying kinetics in superheated steam were presented in this paper.
KEYWORDS
PAPER SUBMITTED: 2015-05-08
PAPER REVISED: 2016-03-27
PAPER ACCEPTED: 2016-04-06
PUBLISHED ONLINE: 2016-05-08
DOI REFERENCE: 10.2298/TSCI151111107S
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2016, VOLUME 20, ISSUE 4, PAGES [1185 - 1198]
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© 2017 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence