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박영성,손재익 ( Yeong Seong Park,Jae Ek Son ) 한국화학공학회 1993 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.31 No.3
Heat transfer characteristics of membrane water wall have been determined in a pilot-scale fluidized bed coal combustor. The effects of fluidizing velocity(2.2-3.2 m/s) and bed temperature(800-960℃) on individual heat transfer coefficient and heat flux have been determined. The heat transfer coefficients of the in-bed membrane water wall increase with bed temperature, while it exhibits a maximum value with fluidizing gas velocity. Also, the heat transfer coefficients of membrane water wall were slightly lower than those of typical horizontal and vertical tube located in a fluidized bed. The heat transfer coefficients of freeboard membrane water wall appeared to be 30-40% of those of in-bed membrane water wall and they increase with fluidizing velocity and bed temperature.
석탄유동층 연소로에서의 Freeboard 연소특성 2 . 수학적 모델링
박영성,김영성,손재익,맹기석 ( Yeong Seong Park,Young Sung Ghim,Jae Ek Son,Ki Suck Maeng ) 한국화학공학회 1994 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.32 No.1
A mathematical model for the carbon combustion reaction in the freeboard of a fluidized bed combustor using domestic anthracite coal was developed by using the entrainment mechanism of unburned carbon particle and applying the related reaction kinetics. The extent of carbon combustion, gas composition and temperature distributions in the freeboard can be determined from the proposed model. It was also found that among the kinetic parameters, the surface reaction rate constant gives significant effects on the temperature and gas compositions in the freeboard, while the CO combustion reaction rate constant gives a dominant effect on CO composition in the freeboard.
강석환,이영우,강용,한근희,이창근,진경태,손재익,박영성,Kang, Suk-Hwan,Rhee, Young-Woo,Kang, Yong,Han, Keun-Hee,Yi, Chang-Keun,Jin, Gyoung-Tae,Son, Jae-Ek,Park, Yeong-Seong 한국에너지학회 1996 에너지공학 Vol.5 No.2
석탄가스화 복합발전 시스템의 주요 단위 공정인 고온건식 탈황공정에 사용되는 탈황제의 개발을 위한 연구의 일환으로 국내산 철광석과 호주산 철광석에 대해 환원, 황화 및 재생 반응을 수행하였다. 실험 장치로는 TGA와 시료 제조용 고정층 반응기를 이용하였고, BET 표면적, SEM, 탈황/재생 cycle 실험, 반응 온도 변화 및 탈황제의 질량변화곡선 등을 이용하여 세가지 철계 탈황제에 대한 기초반응 특성을 규명하였다. 500-$700^{\circ}C$ 구간에서 반응온도 증가에 따라 탈황반응의 H$_2$S 제거율과 재생반응의 재생율이 증가하였다. Reduction, sulfidation, and regeneration reactions were performed using domestic and Australian iron ore in order to develop a desulfurizing sorbent for the high temperature desulfurization process that is one of major processes in the integrated coal gasification combined cycle (IGCC) system. A TGA (Thermogravimetric Analysis) reactor and a fixed-bed reactor were used. Some basic kinetic information was obtained from BET surface area measurements, SEM photos, cyclic reactions, reaction temperature changes and TGA curves of the sorbents. The rates of both desulfurization and regeneration increased with increasing reaction temperature in the range of 500-700$^{\circ}C$.