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

Author

Anna Sciazko, Yosuke Komatsu, Marcin Zakrzewski, Taro Akiyama, Akira Hashimoto, Naoki Shikazono, Shozo Kaneko, Shinji Kimijima, Janusz S. Szmyd, and Yoshinori Kobayashi

Subjects
Turow lignite, superheated steam drying, drying characteristic, low-rank coal (LRC), lignite upgrading, Technology
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.

Published
2016
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2. Experimental Attempts to Investigate the Influence of Petrographic Properties on Drying Characteristics of Lignite in Superheated Steam Atmosphere

Author

Naoki Shikazono, Taro Akiyama, Shozo Kaneko, Marcin Zakrzewski, Janusz S. Szmyd, Yoshinori Kobayashi, Yosuke Komatsu, Shinji Kimijima, Akira Hashimoto, and Anna Sciazko

Subjects
Thermal efficiency, Control and Optimization, Power station, 020209 energy, Energy Engineering and Power Technology, 02 engineering and technology, Sensible heat, low-rank coal (LRC), lcsh:Technology, Atmosphere, 020401 chemical engineering, Latent heat, 0202 electrical engineering, electronic engineering, information engineering, Coal, 0204 chemical engineering, Electrical and Electronic Engineering, Engineering (miscellaneous), drying characteristic, Petroleum engineering, Renewable Energy, Sustainability and the Environment, business.industry, Chemistry, lcsh:T, Superheated steam, lignite upgrading, Fluidized bed, Turow lignite, superheated steam drying, business, Energy (miscellaneous)
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.

Published
2016

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