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유동층연소로에서 압력요동특성치를 이용한 균일입자계 유, 무연탄 혼합연소특성 해석
Analysis of Combustion Characteristics of Bituminous and Anthracite Coal Using Pressure fluctuation Properties in a Fludized Bed Combustor(Uniform Particle System)
HWAHAK KONGHAK, August 1999, 37(4), 609-614(6), NONE
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Abstract
내경 0.155m, 높이 2.2m의 유동층연소로에서 유연탄과 무연탄의 혼합연소특성실험을 수행하였다. 본 실험에 사용된 무연탄은 발열량 2,020kcal/kg으로 저품위 고회분 무연탄이며, 유연탄은 호주산으로 발열량이 6,520kcal/kg인 저회분 고품위이다. 유동층연소로에서 연소특성을 해석하기 위하여 균일입자의 무연탄과 유연탄을 대상으로 무연탄 혼합비, 석탄 입경비 등을 변수로 실험을 수행하여 압력요동특성치 및 물리화학적 특성치를 이용하여 연소특성을 해석하였다. 유동층연소로에서 혼합석탄의 연소특성 해석은 압력요동특성치의 압력요동의 표준편차, 평균압력, power spectrum density function을 이용하였으며, 압력요동특성치로부터 유동층연소로에서 각각 석탄의 연소영역을 측정할 수 있었다.
The characteristics of mixed-firing of an anthracite and a bituminous coal were studied in a fluidized bed combustor(0.155m-I.D., 2.2 m-height). The used domestic anthracite coal has heating value of 2,010 kcal/kg and the imported high-calorific bituminous coal has heating value of 6,520 kcal/kg. The physicochemical analysis and the pressure fluctuation properties were measured to interpret the combustion characteristics in a fluidized bed combustor of uniform particles of mixed anthracite and bituminous coal is a function of the particle size ratio and the anthracite mixing fraction. The combustion characteristics of mixed fuels in a fluidized bed combustor could be interpreted by using standard deviation of pressure fluctuations, mean pressure and power spectrum density function. The different burning region of fluidized bed combustor was measured by the pressure fluctuation properties.
Keywords
References
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