Numerical Investigation of Waste Plastic Injection in a Blast Furnace
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概要
- 論文の詳細を見る
In the present study, waste plastic injection in blast furnace processes is investigated numerically. A mathematical model developed in this study describes turbulent flows, heat and mass transfer, chemical reactions in gas, particle and coke-bed phases, and particle trajectories. In the simulation, pulverized particles of coal or plastics are injected into a blowpipe with a nitrogen gas stream, and are then supplied to the raceway region in the coke particle bed. The difference in the gasification behaviors between coal and plastic particles are discussed. The effects of the diameter of plastic particles on the gasification behavior are also investigated. Coal particles are rapidly gasified in the blowpipe because of their small size. In contrast, the gasification of plastic particles rarely occurs in the blowpipe, even if small plastic particles are injected. In addition, the flows of plastic particles are biased in the blowpipe, and consequently the reaction zone of gasification is narrow. In the raceway of the coke bed, the pulverized coal particles exit the raceway due to their small diameter, and are then discharged from the coke bed without sufficient gasification. On the other hand, the plastic particles circulate in the raceway until the diameters thereof decrease below a critical diameter. As a result, since the gasification reaction progresses during the circulation, the combustion efficiency of plastic particles remains high even though the initial diameter of the plastic particles is large.
- 社団法人 化学工学会の論文
- 2008-03-01
著者
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Aoki Hideyuki
Dep. Of Chemical Engineering Graduate School Of Engineering Tohoku Univ.
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Aoki Hideyuki
Department Of Chemical Engineering Tohoku University
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Aoki Hideyuki
Graduate School Of Engineering Tohoku University
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MIURA TAKATOSHI
Department of Chemical Engineering, Tohoku University
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MIURA Takatoshi
Graduate School of Engineering, Tohoku University
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MOROZUMI Yoshio
Department of Chemical Engineering, Kyushu University
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Morozumi Yoshio
Department Of Chemical Engineering Tohoku University
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Morozumi Yoshio
Department Of Chemical Engineering Kyushu University
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Miura Takatoshi
Dep. Of Chemical Engineering Graduate School Of Engineering Tohoku Univ.
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Miura Takatoshi
Department Of Chemical Engineering Graduate School Of Engineering Tohoku University
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Miura Takatoshi
Department Of Biochemistry And Engineering Tohoku University
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GOTO Akinori
Department of Chemical Engineering, Tohoku University
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HAGIYA Hideto
Department of Chemical Engineering, Tohoku University
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Goto Akinori
Department Of Chemical Engineering Tohoku University
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Hagiya Hideto
Department Of Chemical Engineering Tohoku University
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Aoki Hideyuki
Department Of Applied Microbial Technology Kumamoto Institute Of Technology
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Miura Takatoshi
Department of Biochemistry & Engineering, Tohoku University
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