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論文 |
論文
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松江, 孝博 ; 新井, 雅隆 ; 廣安, 博之
概要:
application/pdf<br />Journal Article<br />The evaporation and combustion characteristics of a small CWM droplet were analyzed on a hot surface in a test furnace. The minimum temperatures for decomposing combustion caused by the
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volatile matter of the coal and char combustion rise with a decrease of the initial diameter of the droplet. Droplets with diameters below about 1.3mm show different combustion characteristics from the larger droplets. From the photographic observation of the final state of the burned CWM droplet, the cracked shell and popcorn states were noted on the agglomerated surface of the ash. These symptoms appeared more clearly when the initial diameter of the droplet was larger than 1.3mm. The contraction ratio of the diameter in the dried-up state decreases correspondingly with the decrease in the initial diameter of the droplet.
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論文 |
論文
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松江, 孝博 ; 新井, 雅隆 ; 廣安, 博之
概要:
application/pdf<br />Journal Article<br />The evaporation and combustion characteristics of a single coal-water slurry droplet were studied in an elevated temperature environment and in a hot air stream by measuring the
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temperature of a burning droplet and observing its behavior. When the droplet was suspended in an elevated temperature environment, the decomposing combustion, that is, the combustion of an inflammable gas included in the coal, started after the dry-up. The surface reaction, that is, the combustion at the coal surface, followed after that. Thereby, the surface reaction was slightly influenced by the decomposing combustion. When the droplet was suspended in a hot air stream, the decomposing combustion started during the surface reaction process and a blue wake flame was induced. In this case, the spread of the surface reaction region was prevented by a flame of the decomposing combustion.
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