Distribution of solids concentration and temperature in the combustion chamber of the SC-OTU CFB boiler

• Autorzy: Błaszczuk A. , Komorowski M. , Nowak W.
• Języki publikacji: EN

Abstrakty

EN

One of the main parameters influencing heat transfer in a circulating fluidized bed boiler is the distribution of the bed's solids concentration within the contour of the boiler’s combustion chamber. This paper contains an analysis of the impact of the solids concentration in a fluidized bed on the vertical temperature profile in the combustion chamber of a SC-OTU CFB boiler. Investigations were conducted at different loads of nominal generator power: 100%, 80%, 60% and 40%. Solids concentration was determined through pressure sensor measurements. Pressure measurements were taken at 11 measuring ports situated on the front wall of the combustion chamber. The vertical temperature profile was produced on the basis of temperature measurements from various furnace elevations. The combustion process was carried out at various primary to secondary air ratios with a constant excess air coefficient.

Słowa kluczowe

EN

temperature distribution; solids concentration; CFB boiler; bed pressure; unit loads

PL

rozkład temperatury; koncentracja substancji stałych; kocioł fluidalny; ładunki jednostkowe

• Wydawca: Institute of Heat Engineering, Warsaw University of Technology
• Czasopismo: Journal of Power Technologies
• Rocznik: 2012
• Tom: Vol. 92, nr 1
• Strony: 27--33
• Opis fizyczny: Bibliogr. 10 poz., tab., rys., wykr.

Twórcy

autor

Błaszczuk A.

autor

Komorowski M.

autor

Nowak W.

• Environmental Protection and Engineering, Czestochowa University of Technology, 69 Dabrowskiego Street, 42-201 Czestochowa, Poland,

Bibliografia

• [1] Y. Hua, G. Flamant, J. Lu, D. Gauthier, Modelling of axial and radial solid segregation in a cfb boiler, Chemical Engineering and Processing 43 (2004) 971-978.
• [2] A. Svensson, F. Johnsson, B. Leckner, Fluid-dynamics of the bottom bed of circulating fluidized bed boilers, in: Proceedings, 12th Int. Conf. on Fluidized Bed Combustion, L. Rubow and G. Commonwealth, ed., San Diego, pp 887-897, 1993.
• [3] F. Johnsson, B. Leckner, Vertical distribution of solids in a cfb-furnace, in: Proceedings of 13th International Conference on Fluidized Bed Combustion, ASME, Orlando, May 7-10, pp. 671-679, 1995.
• [4] B. Leckner, Fluidized bed combustion: mixing and pollutant limitation, Prog. Energy Combust. Sci. 24 (1998) 31-61.
• [5] W. Zhang, F. Johnsson, Fluid dynamics boundary layers in circulating fluidized bed boilers, report a91- 193, issn 0281-0034, Tech. rep., Dept. of Energy Conversion, Chalmers University of Technology, Goteborg (1991).
• [6] R. Sekret, Warunki cieplno-przepływowe i emisje zanieczyszczeń w kotłach z cyrkulacyjną warstwą fluidalną dużej mocy, Zeszyty Naukowe, Politechnika Śląska, Gliwice 1694 (2005) 5-118.
• [7] R. Brown, E. Brue, Resolving dynamical features of fluidized beds from pressure fluctuations, Powder Technology 119 (2001) 68-80.
• [8] J. Koornneef, M. Junginger, A. Faaij, Development of fluidized bed combustion - an overview of trends, An overview of trends, performance and cost, Progress in Energy and Combustion Science 33 (2007) 19-55.
• [9] Materials of Foster Wheeler Energy Oy, Finland 2009.
• [10] A. Hotta, Foster wheeler’s solutions for large scale cfb boiler technology, features and operational performance of lagisza 460mwe cfb boiler, in: Proc. 20th International conference on Fluidized Bed Combustion, pp. 59-70, May 18-21, Xian China” 2009.