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

• Autorzy: Błaszczuk A. , Komorowski M. , Nowak W.
• Konferencja: Problemy badawcze energetyki cieplnej / Konferencja (10 ; 13-16.12.2011 ; Warszawa, Polska)
• Języki publikacji: EN

Abstrakty

EN

One of the main parameters influenced on the heat transfer in the circulating fluidized bed boiler is distribution of bed’s solids concentration within the contour of boiler’s combustion chamber. In this paper analysis of influence of fluidized bed’s solids concentration on the vertical temperature profile in the combustion chamber of SC-OTU CFB boiler is carried out. Investigations were conducted with different loads of generator’s nominal power i.e. 100%, 80%, 60% and 40%. Solids concentration was specified on the base of pressure measurement within boiler’s combustion chamber using pressure sensors. Pressure measurements were carried out in 11 measuring ports situated on the front wall of combustion chamber. Vertical temperature profile was achieved on the base of temperature measurements at different furnace elevations. Combustion process was carried out with different primary to secondary air ratio and constant excess air coefficient.

Słowa kluczowe

EN

combustion chamber; combustion process; solids concentration; CFB boiler; heat transfer

PL

komora spalania; proces spalania; stężenie substancji stałych; kocioł CFB; wymiana ciepła

• Wydawca: Oficyna Wydawnicza Politechniki Warszawskiej
• Czasopismo: Prace Naukowe Politechniki Warszawskiej. Konferencje
• Rocznik: 2011
• Tom: z. 27
• Strony: 7--15
• Opis fizyczny: Bibliogr. 11 poz., rys., tab., wykr.

Twórcy

autor

Błaszczuk A.

• Czestochowa University of Technology, Institute of Advanced Energy Technologies

autor

Komorowski M.

• Czestochowa University of Technology, Institute of Advanced Energy Technologies

autor

Nowak W.

• Czestochowa University of Technology, Institute of Advanced Energy Technologies

Bibliografia

• [1] Hua Y., Flamant G., Lu J., Gauthier D.: Modelling of axial and radial solid segregation in a CFB boiler, Chemical Engineering and Processing 43 (2004) 971-978
• [2] Svensson A., Johnsson F., Leckner B.: Fluid-dynamics of the bottom bed of circulating fluidized bed boilers, Proceedings, 12th Int. Conf. on Fluidized Bed Combustion, L. Rubow and G. Commonwealth, ed., San Diego, pp. 887-897, 1993
• [3] Leckner B.: Fluidized bed combustion: mixing and pollutant limitation, Prog. Energy Combust. Sci. Vol. 24, pp. 31-61, 1998
• [4] Johnsson F., Leckner B.: Vertical distribution of solids in a CFB-furnace, Proceedings of 13th International Conference on Fluidized Bed Combustion, ASME, Orlando, May 7-10, 1995, pp. 671-679
• [5] Zhang W., Johnsson F.: Fluid Dynamics Boundary Layers in Circulating Fluidized Bed Boilers, Report A91-193, ISSN 0281-0034, Dept. of Energy Conversion, Chalmers University of Technology, Goteborg
• [6] Zhang W., Jolmsson F., Leckner B.: in Proceedings of the Fourth International Conference on Circulating Fluidized Beds, ed. A. A. Avidan. AIChE, Hidden Valley, pp. 266-273 (1993)
• [7] Sekret R.: Warunki cieplno-przepływowe i emisje zanieczyszczeń w kotłach z cyrkulacyjną warstwą fluidalną dużej mocy, Politechnika Śląska, Zeszyty Naukowe Nr 1694, Gliwice, 2005 (In Polish)
• [8] Brown R.C., Brue E.,: Resolving dynamical features of fluidized beds from pressure fluctuations, Powder Technology 2001, 119, 68-80
• [9] Koornneef J., Junginger M., Faaij A.: Development of fluidized bed combustion - An overview of trends, performance and cost, Progress in Energy and Combustion Science 33 (2007) 19-55
• [10] Materials of Foster Wheeler Energy Oy, Finland 2009.
• [11] Hotta A.: Foster Wheeler’s solutions for large scale CFB boiler technology. Features and operational performance of Lagisza 460Mwe CFB boiler. Proc. 20th International conference on Fluidized Bed Combustion, pp. 59-70, May 18-21, Xian China, 2009.