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Energies 2016, 9(5), 371; doi:10.3390/en9050371

Experimental Attempts to Investigate the Influence of Petrographic Properties on Drying Characteristics of Lignite in Superheated Steam Atmosphere

1
AGH University of Science and Technology, Department of Fundamental Research in Energy Engineering, Krakow 30-059, Poland
2
Shibaura Institute of Technology, Division of Regional Environment Systems, Saitama 337-8570, Japan
3
The University of Tokyo, Institute of Industrial Science, Tokyo 153-8505, Japan
4
Shibaura Institute of Technology, Department of Machinery and Control Systems, Saitama 337-8570, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Jean-Pierre Bédécarrats
Received: 28 February 2016 / Revised: 2 May 2016 / Accepted: 4 May 2016 / Published: 16 May 2016
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Abstract

A superheated steam fluidized bed dryer (SSFBD) in a self-heat recuperative configuration has a great potential of improving thermal efficiency of a lignite-fired power plant by recovering both of latent heat of vaporization of water kept in the fuel and part of sensible heat during the fuel processing. However, the optimal design of the dryer requires the fundamental knowledge of drying characteristics in respect to the individual properties of the utilized fuel. Experimental investigation to determine the correlation between a specific coal properties originated from geological background and its drying characteristics is thus the major concern in this paper. The investigated lignite is a representative of Turoszow deposit in Poland. Experimental attempts unveiling drying kinetics were carried out for 5 mm and 10 mm diameter spherical samples in the superheated steam atmosphere in the temperature range of 110 °C–170 °C. Simultaneous and continuous measurements of changes in weight, surface and interior temperatures and appearance on each tested sample were carried out for describing drying behavior. Analytical investigation was applied to explain the drying characteristics, which are strongly affected by the individual properties of coal and the inherent ash composition. View Full-Text
Keywords: Turow lignite; superheated steam drying; drying characteristic; low-rank coal (LRC); lignite upgrading Turow lignite; superheated steam drying; drying characteristic; low-rank coal (LRC); lignite upgrading
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Sciazko, A.; Komatsu, Y.; Zakrzewski, M.; Akiyama, T.; Hashimoto, A.; Shikazono, N.; Kaneko, S.; Kimijima, S.; Szmyd, J.S.; Kobayashi, Y. Experimental Attempts to Investigate the Influence of Petrographic Properties on Drying Characteristics of Lignite in Superheated Steam Atmosphere. Energies 2016, 9, 371.

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