Ignition Processes of Pulverized Coal Injected into Preheated Gas Flow

Ignition properties of pulverized coal clouds are examined under similar conditions to those of an industrial burner by using newly developed experimental equipment. Pulverized coals were injected into a preheated gas flow formed by catalytic combustion. The coal was ignited in an open area. Observa...

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Bibliographic Details
Published inKAGAKU KOGAKU RONBUNSHU Vol. 26; no. 2; pp. 194 - 201
Main Authors TANIGUCHI, MASAYUKI, YAMAMOTO, KENJI, OKAZAKI, HIROFUMI, KOBAYASHI, HIRONOBU, AZUHATA, SHIGERU, TSUMURA, TOSHIKAZU
Format Journal Article
LanguageJapanese
Published The Society of Chemical Engineers, Japan 10.03.2000
Subjects
coal concentration
devolatilization
ignition
pulverized coal combustion
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Summary:Ignition properties of pulverized coal clouds are examined under similar conditions to those of an industrial burner by using newly developed experimental equipment. Pulverized coals were injected into a preheated gas flow formed by catalytic combustion. The coal was ignited in an open area. Observation with a high speed camera showed that coal flames were formed and propagated from ignited particles heated by the gas flow. The flames were distributed at first, then the fiame grew and combined with other flames to form a continuous flame. The continuous flame was formed rapidly from the ignited particle, when the coal concentration increased. The devolatilization rate was accelerated when coal concentration increased, because of increasing of radiation heat transfer from the propagating flames.
ISSN:0386-216X
1349-9203
DOI:10.1252/kakoronbunshu.26.194