The influence of flow rate of the gas in the combustion chamber on oxy-combustion process of coal in atmospheric furnace with circulating fluidized bed

• Autorzy: Jankowska, S. , Czakiert, T. , Krawczyk, G. , Jesionowski, Ł. , Borecki, P. , Nowak, W.
• Języki publikacji: EN

Abstrakty

EN

Studies on combustible matter conversion during oxy-fuel combustion in circulating fluidized bed (CFB) environment are presented. A small pilot-scale CFB facility has been retrofitted to be ready for operation in an oxy-fuel regime, which means elevated partial pressure of oxygen in a gaseous atmosphere of O2/CO2. Maximum thermal load of the unit is estimated at 0.1MW. The unit is fired with polish bituminous coal. The paper is focused on carbon, combustible sulfur and fuel-N behavior in combustion chamber that runs under oxy-fuel CFB conditions. The analysis is based on in-furnace sampling of flue gas and on calculations of carbon, sulfur and nitrogen conversion ratios. The flow rate of the gas in the combustion chamber was the variable parameter of the process. The parameter change influenced distribution of particle concentration in fluidized bed material and the temperature distribution (along) the combustion chamber. Furthermore, it influenced the residence time of fuel particles in the combustion zone, and finally was reflected in the composition of flue gases. Measurement of flue gas composition was carried out on four levels of the combustion chamber, allowing to track the progress of the conversion of elemental carbon, sulfur combustible and fuel-nitrogen along the height of the combustion chamber. The described investigations are a part of the core work scheduled in the project “Advanced Technologies for Energy Generation: Oxy-combustion technology for PC and FBC boilers with CO2 capture” funded by the National Centre for Research & Development in Poland as well as supported by power industry.

Słowa kluczowe

EN

oxy-combustion; CFB; pilot-scale; emission

• Czasopismo: Archivum Combustionis
• Rocznik: 2015
• Tom: Vol. 35 nr 1
• Strony: 41--50
• Opis fizyczny: Bibliogr. 8 poz., rys., tab.

Twórcy

autor

Jankowska, S.

• Czestochowa University of Technology Faculty of Environmental Engineering and Biotechnology Institute of Advanced Energy Technologies Dabrowskiego 69, 42-201 Czestochowa, Poland,

autor

Czakiert, T.

• Czestochowa University of Technology Faculty of Environmental Engineering and Biotechnology Institute of Advanced Energy Technologies Dabrowskiego 69, 42-201 Czestochowa, Poland

autor

Krawczyk, G.

• Czestochowa University of Technology Faculty of Environmental Engineering and Biotechnology Institute of Advanced Energy Technologies Dabrowskiego 69, 42-201 Czestochowa, Poland

autor

Jesionowski, Ł.

• Czestochowa University of Technology Faculty of Environmental Engineering and Biotechnology Institute of Advanced Energy Technologies Dabrowskiego 69, 42-201 Czestochowa, Poland

autor

Borecki, P.

• Czestochowa University of Technology Faculty of Environmental Engineering and Biotechnology Institute of Advanced Energy Technologies Dabrowskiego 69, 42-201 Czestochowa, Poland

autor

Nowak, W.

• Czestochowa University of Technology Faculty of Environmental Engineering and Biotechnology Institute of Advanced Energy Technologies Dabrowskiego 69, 42-201 Czestochowa, Poland
• AGH University of Science and Technology Faculty of Energy and Fuels, Department of Thermal Engineering and Fluid Flow Mickiewicza 30, 30-059 Cracow, Poland

Bibliografia

• [1] Raport „Technologia wychwytywania i geologicznego składowania dwutlenku węgla (CCS) sposobem na złagodzenie zmian klimatu”, http://www.pkpplewiatan.pl/upload/File/2009_05/RAPORT%20CCS.pdf.
• [2] Czakiert T., Muskala W., Jankowska S., Krawczyk G., Borecki P., Jesionowski Ł., Nowak W.: Proc. of the 21st International Conference on Fluidized Bed Combustion, Naples, Italy (2011), pp. 495-02.
• [3] Czakiert T., Sztekler K., Karski S., Markiewicz D., Nowak W.: Fu. Proc. Tech. 91 (2010), pp. 1617-23.
• [4] Basu, P., Fraser, S.A.; Circulating Fluidized Bed Boilers - Design and Operations, pp. 41, Butterworth-Heinemann, Stoneham, USA, (1991).
• [5] Kunii D., Levenspiel O. (1991), Fluidization Engineering 2nd Edition, Butterworth-Heinemann, Stoneham, USA.
• [6] Czakiert T., Muskala W., Jankowska S., Krawczyk G., Borecki P., Jesionowski Ł., Nowak W.: Energy&Fuels 26 (2012), pp. 5437-45.
• [7] Pawlak-Kruczek H., Ostrycharczyk M., Długosz J.: Abstracts of the 3rd IEA GHG International Conference on Oxyfuel Combustion, Leon, Spain, September 9-13; (2013);
• [8] Czakiert T. (2013), Tlenowe spalanie węgla w cyrkulacyjnej warstwie fluidalnej, Monografia, nr 282, Wydawnictwo Politechniki Częstochowskiej, Częstochowa.