Browse > Article

Numerical Study on the Baffle Structure for Determining the Flow Characteristic in Small Scale SCR System  

Park, Mi-Jung (Environmental Aerosol Engineering Laboratory, Department of Environmental Engineering, Yeungnam University)
Chang, Hyuk-Sang (Environmental Aerosol Engineering Laboratory, Department of Environmental Engineering, Yeungnam University)
Ha, Ji-Soo (Heat and Energy Laboratory, Department of Energy and Environmental Science, Keimyung University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.32, no.9, 2010 , pp. 862-869 More about this Journal
Abstract
Numerical analysis was done to evaluate the gas flow distribution in small scale SCR system which has $2.4{\times}2.4{\times}3.1\;m^3$ in volume and 25,300 Sm3/hr in flue gas flow capacity. Various types of baffles proposed for controlling the flow uniformity were evaluated by the CFD analysis to find the optimal geometry of the baffle in the SCR system. By installing baffles in the SCR system, the RMS (%) value was raised up to 6.2% compared with the baffle-uninstalled state. The effect of baffle thicknesses on the RMS (%) value was not shown within 0 and 8 mm in thickness, but the RMS (%) value was raised by 2.5% in 10 mm of baffles thickness, which causes the unstability in flow. By comparison between the shape of baffles, it is known that the lattice type baffle has better performance in controlling the flow uniformity than the circular truncated cone type baffle or mixer type baffle. RMS (%) values have more that 10% difference according to the shape of baffle type.
Keywords
CFD (Computation Fluid Dynamics); SCR (Selected Catalystic Reduction); Baffle; Retention Time; Flow Uniformity;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 FLUENT Inc., FLUENT User's Guide, Ver.12.0(2009).
2 Frost, W. and Moulden, T. H., Handbook of Turbulence, Volume 1: Fundamentals and Application, Plenum Press, New York(1977).
3 임석채, 장혁상, 하지수, "수치해석적 방법을 이용한 비등 온 고농도 연무의 배기량 산정에 관한 연구," 대한환경공학회지, 30(5), 534-543(2008).
4 신완호, 홍원석, 송동근, "전기집진기 내부 유동 균일도 평가 기준인 ICAC EP-7과 %RMS 간 상관관계," 한국대기환경학회지, 26(2), 234-240(2010).   과학기술학회마을
5 한지웅, 정영식, 이창언, "난류강도가 수소 동축분류 난류 확산화염의 NOx 생성에 미치는 영향," 대한기계학회지, 25(2), 147-155(2001).
6 김광추, 박만홍, 윤준규, 임종한, "복합화력 탈질설비 성능 향상을 위한 암모니아 주입 그리드의 최적설계 방안에 관한 연구," 대한설비공학회지, 19(12), 811-820(2007).   과학기술학회마을
7 Kenneth, W., Cecil, F. W. and Wayne, T. D., Air Pollution Its Origin and Control, 3rd ed., Prentice Hall, New Jersey (1998).
8 홍길화, 공호정, 황인구, 박심수, "NH3-SCR 반응기 내에서의 NH3/NOx 및 SCR 촉매 온도가 DeNOx 성능에 미치는 영향," 대한기계학회 2008 추계학술대회 논문집, 평창, pp. 3096-3101(2008).
9 한정원, 홍길화, 황인구, 명차리, 박심수, 이내현, "디젤배기모사장치를 이용한 Urea-SCR 시스템의 NO/NO2의 비율과 촉매 온도가 DeNOx 효율에 미치는 영향," 대한기계학회 2008 에너지 및 동력공학부문 춘계학술대회 논문집, 대전, pp. 67-72(2008).
10 장익규, 윤여빈, 박영준, 이성욱, 조용석, "선택적 환원 촉매(SCR)에서 암모니아(NH3) 분사량 최적화에 대한 실험적 연구," 대한기계학회 2008 추계학술대회 논문집, 평창, pp. 2874-2879(2008).
11 환경부, "대기환경보전법," (2010).
12 FLUENT Inc., FLUENT User's Guide, Ver.12.0(2009). 8. FLUENT Inc., GAMBIT User's Guide, Ver.2.0(2000).
13 Patankar, S. V., Numerical Heat Transfer and Fluid Flow, McGraw-Hill. New York(1980).