THERMAL SCIENCE

International Scientific Journal

Anna Sciazko

,

Janusz S. Szmyd

,

Shinji Kimijima

,

Shozo Kaneko

,

Naoki Shikazono

,

Akira Hashimoto

,

Taro Akiyama

,

Marcin Zakrzewski

,

Yosuke Komatsu

,

Yoshinori Kobayashi

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
lignite, low-rank coal, lignite drying, superheated steam drying, lignite upgrading
PAPER SUBMITTED: 2015-05-08
PAPER REVISED: 2016-03-27
PAPER ACCEPTED: 2016-04-06
PUBLISHED ONLINE: 2016-05-08
DOI REFERENCE: https://doi.org/10.2298/TSCI151111107S
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2016, VOLUME 20, ISSUE Issue 4, PAGES [1185 - 1198]
REFERENCES
  1. Batas-Bjelic, I., et al., A Realistic EU Vision of a Lignite-based Energy System in Transition: Case Study of Serbia, Therm. Sci., 19 (2015), pp. 371-382
  2. Agraniotis, M., et al., Investigation of Pre-drying Lignite in an Existing Greek Power Plant, Therm. Sci., 16 (2012), pp. 283-296
  3. Fushimi, C., et al., Novel Drying Process Based on Self-Heat Recuperation Technology, Dry. Technol., 29 (2010), pp. 105-110
  4. Jangam, S. V., et al., A Critical Assessment of Industrial Coal Drying Technologies: Role of Energy, Emissions, Risk and Sustainability, Dry. Technol., 29 (2011), pp. 395-407
  5. Klutz, H. J., et al., WTA Fine Grain Drying: Module for Lignite-fired Power Plants of the Future - Development and Operating Results of the Fine Grain Drying Plant, VGB Power Tech, 86 (2006), pp. 57-61
  6. Klutz, H., et al., The RWE Power WTA Process (Fluidized bed drying) as a Key for Higher Efficiency, Górnictwo I Geoinżynieria (AGH J. Min. Geoengin.), 35 (2011), pp. 147-153
  7. Mujumdar, A. S., Superheated Steam Drying, Handb. Ind. Dry., 2006, pp. 439-452
  8. Komatsu, Y., et al., An Experimental Investigation on the Drying Kinetics of a Single Coarse Particle of Belchatow Lignite in an Atmospheric Superheated Steam Condition, Fuel Process. Technol., 131 (2015), pp. 356-369
  9. Kiriyama, T., et al., Experimental Observations and Numerical Modeling of a Single Coarse Lignite Particle Dried in Superheated Steam, Mater. Trans., 54 (2013), pp. 1725-1734
  10. Kiriyama, T., et al., Size Dependence of the Drying Characteristics of Single Lignite Particles in Super-heated Steam, Metall. Mater. Trans. E., 1 (2014), pp. 349-363
  11. Widera, M., Changes of the Lignite Seam Architecture − A Case Study from Polish Lignite Deposits, Int. J. Coal Geol., 114 (2013), pp. 60-73
  12. Kopp, O. C., Harris, L. A., Initial Volatilization Temperatures and Average Volatilization Rates of Coal ‒ Their Relationship to Coal Rank and Other Characteristics, Int. J. Coal Geol., 3 (1984), pp. 333-348
PDF VERSION [DOWNLOAD]
Influence of geological variations on lignite drying kinetics in superheated steam atmosphere for Belchatow deposit located in the central Poland

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, 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