Abstract
The paper is focused on the idea of large-scale CFB boiler operation with oxygen/CO 2-modified atmosphere inside combustion chamber. The following main advantages can be found for this technology: reduction of pollutant emissions, possibility of high efficiency separation of CO 2 from the exhaust gases that results from increased CO 2 concentration, lower chimney loss due to the reduction of flue gases in a volume, limitation of the combustion chamber dimensions etc. The paper presents a model of coal combustion in oxygen-enriched CFB environment, where air staging, desulfurization process, NO x formation and reduction as well as a stationary dense phase of coarse particles in the bottom part of combustion chamber and a circulating dilute phase in the upper part are included.
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