Combustion and Heat Transfer Model Study on CFB Dense Zone under Oxygen-Enriched Combustion

The heat transfer character of oxy-fired CFB boiler was studied, and a model of dense zone that considering the combustion and heat transfer is suggested. Through the model, heat transfer coefficient and its impact parameters in dense zone are studied. Some research are done with 30%, 50%,70% O2 conditions, and it was found that the heat transfer coefficient has no obvious change compared to common CFB boiler. The model takes a consideration of combustion condition in boiler, and offers a better reference for designing of CFB under oxygen-enriched combustion.