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주민희,황갑성,홍성선 ( Min Hi Ju,Kap Sung Hwang,Sung Son Hong ) 충북대학교 산업과학기술연구소 1995 산업과학기술연구 논문집 Vol.9 No.2
Abstract_Roman A freeze-drying of kale was carried out to find out most appropriate eondition and stability in a vacuum freeze dryer. For degree of vacuum, if that is increase, the drying rate decreases, When the degree of vacuum is less than 1.0torr, th
김수호,황갑성,김성수,홍성선 ( Soo Ho Kim,Kap Sung Hwang,Sung Soo Kim,Sung Son Hong ) 한국공업화학회 1995 공업화학 Vol.6 No.3
연소시 어려움이 많은 저급의 국내 무연탄을 입도별로 분류한(335, 200, 127, 90, 50㎛) 후 수직형 사이클론 연소기를 이용하여 공기공급비를 조절하며 석탄의 연소실험을 실행하여 입도에 따른 회분의 포집효율, 온도분포 및 연소효율을 조사하였다. 연소로 내의 온도 분포는 입경이 200㎛보다 큰 시료에서는 공기비 1.2에서 그리고 127㎛보다 작은 시료에서는 공기비 1.4에서 가장 높은 온도를 나타내고 회분의 포집효율은 공기비 증가에 따라 증가하였으며 연소효율은 입경이 작아질수록 증가되었다. The combustion characteristics of low grade anthracites having different particle size were studied by using the vertical-type cyclone combustor. The sample coals were sieved to have different particle size(335, 200, 127, 90, 50㎛). The combustion characteristics were obtained from temperature profile, amount of ash and unburned carbon, and nitrogen oxides[NO_x] in exhaust gas. The highest temperature in combustion chamber was recorded at air ratio of 1.2 for the samples larger than 200㎛ and at air ratio of 1.4 far the smaller than 127㎛. The value of carbon burnout was decreased with increasing the particle size, and the maximum value of that was obtained at air ratio of 1.4 in all sample. The NO_x emission of the effluent gas was increased with decreasing the particle size and increasing the air ratio as well as temperature.