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유동층연소로에서 granulation에 의한 미세입자의 연소효율 향상
Improvement of Combustion Efficiency of Fine Particles by the Granulation in a Fluidized Bed Combustor
HWAHAK KONGHAK, December 1993, 31(6), 824-830(7), NONE
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Abstract
내경 0.1.9m, 높이 1.8m인 유동층연소로에서 미세입자가 포함된 다입자계의 granulation 실험을 수행하였다. 미세입자의 집괴입상화와 유동화특성은 압력요동, 연소효율, 온도분포 및 평균입자크기로서 해석하였으며 granu-lation mechanism은 SEM 분석을 통해 조사하였다. 염과 석탄의 혼합연소시 비유동화가 일어나며 이러한 비유동화현상에 대한 정보를 압력요동신호와 온도분포로부터 알 수 있었다. 유출부에서의 연소효율은 미세입자의 집괴에 의해 3-4배 증가하였고 층내의 granulation mechanism은 agglomeration model임을 알 수 있었다.
Granulation experiment was carried out in a 0.109m ID, 1.8m height fluidized bed combustor of the multi-sized particles. Granulation of fine coal particles and fluidizing characteristics were investigated by the pressure fluctuations, combustion efficiency, temperature profile and mean particle diameter. Granula-tion mechanism was studied by the SEM analysis. Defluidization occurred in the mixed firing of salt and anthracite coal and the information on the information on the defluidization phenomena was interpreted with the pressure fluc-tuation signals and temperature profile. It was found that the combustion efficiency in the elutriated stream was increased 3-4 times by the granulation of fine coal particles and that the granulation mechanism was agglomeration model.
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