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29´¬2/3¹æ2024ǯ
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Page |
161
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Title |
Ash Discharge Estimation and a Survey on the Utilization of Woody Biomass Power Plants in Japan |
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1)µþÅÔÂç³ØÂç³Ø±¡ ¹©³Ø¸¦µæ²Ê ÅԻԴĶ¹©³ØÀ칶 2)¹çƱ²ñ¼Ò CN¥ê¥µ¡¼¥Á |
Authors |
Minori Ike 1), Hiroyuki Kawagoe 2), Masaki Takaoka 1) |
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1)µþÅÔÂç³ØÂç³Ø±¡ ¹©³Ø¸¦µæ²Ê ÅԻԴĶ¹©³ØÀ칶 2)¹çƱ²ñ¼Ò CN¥ê¥µ¡¼¥Á |
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1) Department of Environmental Engineering, Graduate School of Engineering, Kyoto University 2) CN Research, LLC |
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Office name |
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dzÎÁ¼ï¡¤Î®Æ°º½¡¤ANOVA¡¤¿ôÎ̲½µÎࡤ¼ç³¥ |
Key Words |
fuel type, fluidized bed sand, ANOVA, Hayashiʼs quantification methods I, bottom ash |
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Abstract |
A questionnaire survey was conducted to determine the amount of woody biomass combustion ash discharged from power plants and for what it is recycled. Ash content of wood chip is correlated with the bark content, the presence or absence of branches and leaves, and the geological region. The actual amount of ash discharged was in average 2.3 times higher than the calculated ash content in fuel. Facilities using unutilized wood fuel and those using stepped stoker furnaces discharged more bottom ash, while those using bubbling fluidized beds discharged less. Woody biomass ash in Japan is utilized for cement, concrete aggregate, roadbed material, fertilizer, soil conditioner, recycled soil, backfill material, fuel, and material for steelmaking. The average recycling cost was 15,800 yen/t, which tends to be cheaper than cost for ash disposal as waste. |
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