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Experimental and Numerical Study on the Gas Mixing and Reaction in the Freeboard of a Fluidized Bed Incinerator for Sludge Treatment  

Kim, Young-Min (국민대학교 대학원 기계공학과)
Shin, Dong-Hoon (국민대학교 대학원 기계공학과)
Hwang, Seung-Sik (국민대학교 기계시스템공학부)
Publication Information
Journal of the Korean Society of Combustion / v.16, no.4, 2011 , pp. 8-15 More about this Journal
Abstract
The present study investigates the combustion phenomena in a sludge incinerator using experimental and numerical method. The temperature and gas concentration were measured at 33 points during operation of the incinerator in order to assess the mixing and combustion characteristics. Numerical simulation was also carried out using a commercial CFD code. Simplified inlet conditions were introduced in oder to predict the bulk solid combustion and the diffusion of the volatile matter released by pyrolysis of sludge. The experimental results showed that the combustion process is extremely inhomogeneous. Large variations were observed in the temperature and gas concentrations in the freeboard of the incinerator due to poor mixing performance between the air and the combustibles, which is caused by massive and bulk generation of volatile matter by fast pyrolysis of sludge particles. The boundary condition of the CFD simulation was found effective in predicting the poor mixing and combustion performance of the reactor.
Keywords
Sludge; Incineration; Combustion; CFD; Waste;
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1 Y. Kori and R. Takeya, Cross Jet Mixing and Its Effects on Combustion Performance in MSW Incinerators with Natural Gas Reburning, The 3nd Int. Symp. on Incineration and Flue Gas Treatment Technologies, 2-4 July, Brussels, Belgium, 2001
2 S. Kim, D. Shin and S. Choi, Comparative Evaluation of Municipal Solid Waste Incinerator Designs by Flow Simulation, Combust. and Flame, Vol. 106, 1996, pp. 241-251   DOI   ScienceOn
3 D. Shin. C. Ryu and S. Choi, Computational Fluid Dynamics Evaluation of Good Combustion Performance in Waste Incinerator, J. of the Air and Waste Management Association, Vol. 48, 1998, pp. 345-351   DOI   ScienceOn
4 C. Ryu and S. Choi, "Design Consideration for the Cross jet Air Mixing in the MSW Incinerators", Int. Journer of Energy Research, Vol. 21, 1997, pp. 695-706   DOI   ScienceOn
5 C. Ryu and S. Choi, 3D Simulation on jet Air Mixing in the Municipal Solid Waste Incinerators, Combust. Sci. and Tech, Vol. 119, 1996, pp. 155-170   DOI   ScienceOn
6 V. Nasserzadeh, J. Swithenbank, C. Schofield, D. W. Scott and A. Loader, Effects of High Speed Secondary Air Jets and Internal Baffles on the Gas Residence Time in Large Municipal Incinerators, Environmental progress, Vol. 13, No. 2, 1994, pp. 124-133   DOI   ScienceOn
7 박병수, 이진욱, 서정대, 강승균, 도시 폐기물 소각로 파일롯 플랜트 실험을 통한 연소실 해석 모델 설정 및 결과 고찰 한국폐기물학회 춘계 학술대회, 대전, 1999, pp. 131-136
8 권순우, 이종협, 화학반응을 고려한 스토커식 소각로의 3차원 모사연구, 한국화학공학회 논문집, Vol. 36, No. 3, 1998, pp. 353-363
9 이진욱, 박병수, 서정대, 허일상, 2차 공기 분사 특성에 따른 소각로 연소실 유동장 변화 고찰, 제18회 KOSCO SYMPOSIUM 논문집, 1999, pp. 125-135
10 V. Nasserzadeh, J. Swithenbank and B. Jones, Effect of High Speed Secondary Air Jets on the Overall Performance of Large MSW Incinerator with a Vertical Shaft, Combust. Sci. and Tech, Vol. 92, 1993, pp. 389-422   DOI
11 O. H. Madsen, S. binner and K. Jorgensen, Modem Design Technologies for Thermal Optimisation and Pollutant Control in MSW Incinerator Plants, The 1st Int. Symp. on Incineration and Flue Gas Treatment Technologies, 7-8 July, Sheffield, UK, 1997
12 T. Klasen and K. Goner, Numerical Simulation and Optimisation of a Large Municipal Solid Waste Incinerator Plant, The 2nd Int. Symp. on Incineration and Flue Gas Treatment Technologies, 4-6 July, Sheffield, UK, 1999
13 O. Riccius, A. Walther and B. Stoffel, Design of Waste Incinerators Utilising CFD, The 2nd Int. Symp. on Incineration and Flue Gas Treatment Technologies, 4-6 July, Sheffield, UK, 1999
14 M. Perillex, G. Creten, K. Peeters, J. Kumel, K. Gomer, Optimisation of Boiler Design for the Largest MSW Incineration Unit in Belgium and Experience with the "SEGHERS-IBB PRISM", as Improvement for Boiler Performance, The 3nd Int. Symp. on Incineration and Flue Gas Treatnzent Technologies, 2-4 July, Brussels, Belgium, 2001