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배달희(Bae, Dal-Hee),선도원(Shun, Do-Won) 한국신재생에너지학회 2008 한국신재생에너지학회 학술대회논문집 Vol.2008 No.10
Fuel flexibility of CFBC boiler was examined. Combustion characteristics of low grade coal, coal sludge, coal RDF mixture and RDF were compared. The operation result of a commercial 130TPH CFBC co-generation boiler burning a low grade Chinese coal were analysed. Burning characteristics of coal/RDF mixture and coal and industrial sludge mixture were studied in a 0.1MWth scale CFBC test rig. Also RDF fuel were tested in a 8TPH CFBC test facility. Though fuel characteristics were different, the combustion modes were all very stable. The temperature were maintained in between 800-950?C.
분체공학, 유동층, 고분자, 재료(무기, 유기) : 고정층과 순환유동층에서 CaSO4의 환원반응에 대한 온도와 CO농도의 영향
배달희 ( Dal Hee Bae ),유호정 ( Ha Jung Ryu ),박재현 ( Jae Hyeon Park ),이창근 ( Chang Keun Yi ),선도원 ( Do Won Shun ),이동규 ( Dong Kyu Lee ) 한국화학공학회 2003 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.41 No.1
For qualitative understanding of the sulphur capture process in a circulating fluidized bed fumace, the effects of temperature and CO concentration on the reactivity of partially sulfated CaO were experimentally examined. The tests were performed in a fixed bed reactor and lab-scale circulating fluidized bed reactor. The materials used were partially sulfated domestic limestone and bottom ash drained from commercial circulating fluidized bed furnaces. The re-emission of SO_2 from partially sulfated limestone and bottom ash increases with temperature as well as with concentration of the reducing agent CO. From the results of this study, the temperature dependence of sulfation could be explained by reduction theory.
분체공학 , 유동층 , 고분자 , 재료 ( 무기 , 유기 ) : 기계적 교반유동층에서 미세입자의 최소유동화속도에 미치는 교반속도와 온도의 영향
배달희(Dal Hee Bae),류호정(Ho Jung Ryu),선도원(Do Won Shun),진경태(Gyoung Tae Jin),이동규(Dong Kyu Lee),최정후(Jeong Hoo Choi) 한국화학공학회 2002 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.40 No.2
To interpret the effects of agitation speed and temperature on the minimum fluidization velocity, bed and distributor pressure drop and pressure fluctuation signal have been measured in a high temperature mechanically agitated fluidized bed(0.05m i.d. and 1.31m high) using bentonite(mean particle diameter: 3.7㎛, apparent density: 1,681㎏/㎥) as bed material. Fluidization of very fine cohesive powder is possible if mechanical energy is introduced into the bed by agitation. Measured minimum channeling velocity and minimum fluidization velocity increased with increasing bed temperature, however, increased after an initial decrease with increasing agitation speed. The empirical correlation, considering the temperature effect but no effects of agglomerate size and density, on the minimum fluidization velocity of cohesive particles has been proposed on the basis of the experimental data of present study.
분체공학 , 유동층 , 고분자 , 재료 ( 무기 , 유기 ) : 난류유동층에서 고속유동층으로의 전이유속에 대한 온도의 영향
배달희(Dal Hee Bae),류호정(Ho Jung Ryu),선도원(Do Won Shun),진경태(Gyoung Tae Jin),이동규(Dong Kyu Lee) 한국화학공학회 2001 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.39 No.4
Transition velocity from turbulent to fast fluidization has been measured by emptying time method in a high temperature circulating fluidized bed(0.02 m i.d. and 2.0 m high) of sand particle(specific surface mean diameter: 0.256 ㎜, particle density: 2,617 ㎏/㎥) with variation of temperature(15-600℃). Measured transition velocity from turbulent to fast fluidization increased with increasing temperature. The previous correlations on transition velocity to fast fluidization compared with the measured values. Among the previous correlations, correlation of Chehbouni et al.[19] shows relatively good results.