Experimental Study on Super-Heated Steam Drying of Lignite

Shi, Yong Chun; Li, Jie; Li, Xuan You; Wu, Jing; Wu, Mao Gang; Li, Sheng; Wang, Hong Yao; Zhao, Gai Ju; Yin, Feng

doi:10.4028/www.scientific.net/amr.347-353.3077

Cited by 6 publications

(7 citation statements)

References 5 publications

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“…Air [3,4,6,8,9,23, Steam [8, 9, 25, 27, 37, 47-52, 54, 55] Exhaust gases [7,54] Nitrogen [25,31,33,53,56,57] Table 1. Types of drying medium used in the literature.…”

Section: Drying Media Referencesmentioning

confidence: 99%

“…Therefore, the drying temperature can be raised and the higher drying rates can be achieved [18]. The exhaust of the superheated steam drying is pure steam, and so its latent heat can be recovered by the condensation [8,49,53]. Moreover, using superheated steam for the coal drying with high capacities in the power plants seems more effective than the others [6].…”

Section: Drying Media Referencesmentioning

confidence: 99%

“…In the coal combustion, the important part of the energy is consumed to evaporate the moisture inside the coal [5][6][7]. The combustion of the high moisture content coal creates some problems such as the additional energy consumption for the moisture evaporation, the insufficient combustion and the additional exhaust discharge [8]. The LRC should be dried to the required moisture level to decrease the energy losses and the transportation costs, and to increase the quality of the products [9,10].…”

Section: Introductionmentioning

confidence: 99%

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Evaporative Drying of Low-Rank Coal

Pusat¹,

Akkoyunlu²,

Erdem³

2016

Sustainable Drying Technologies

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Low-rank coals including the brown and the subbituminous coals are commonly known to contain high moisture content up to %, wet basis , which limits their utilization around the world in spite of their low cost. Today, the most of the drying technologies are based on the evaporation of the water from the moist product. In this chapter, the most effective parameters on the evaporative coal-drying process are investigated with the data in the recent literature. The effective parameters are evaluated in three categories as follows the parameters about the drying media the type of the media, the temperature, the pressure, the velocity and the relative humidity , the coal parameters the type of the coal and the size and the drying method.

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“…Air [3,4,6,8,9,23, Steam [8, 9, 25, 27, 37, 47-52, 54, 55] Exhaust gases [7,54] Nitrogen [25,31,33,53,56,57] Table 1. Types of drying medium used in the literature.…”

Section: Drying Media Referencesmentioning

confidence: 99%

Section: Drying Media Referencesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evaporative Drying of Low-Rank Coal

Pusat¹,

Akkoyunlu²,

Erdem³

2016

Sustainable Drying Technologies

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“…Looi et al [14] have studied the drying characteristics of Victorian lignite in pressurized superheated steam. Shi et al [15] have investigated the drying behavior of Pongzhuang lignite excavated in China. The research group of the authors of the present paper carried unique experimentation for studying the drying characteristics of Loy Yang (Australia) and Belchatow (Poland) lignite [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2016

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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.

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“…In coal burning, an important part of energy is consumed to evaporate moisture inside the coal [5][6][7][8]. The burning of coal with high moisture content creates some problems such as insufficient combustion and additional exhaust discharge [8]. LRC should be dried to required moisture level to decrease energy losses and transportation costs, and to increase the quality of the products [9,10].…”

Section: Introductionmentioning

confidence: 99%