Combustion Efficiency of a Small-scale Cfb
نویسنده
چکیده
A well-designed CFB combustor can burn coal with high efficiency and within acceptable levels of gaseous emission. In this study, the combustion efficiency of CFB combustor based on the losses has been defined and effects of operational parameters on combustion efficiency have been investigated by a dynamic 2D model which has been developed in our previous studies. Investigations on combustion efficiency are carried out using the model to examine the effects of different operational parameters and coal properties on bed temperature and the overall CO, NOx and SO2 emissions from pilot-scale CFB combustor. Investigations on combustion efficiency are carried out for a pilot-scale CFB combustor. The combustion efficiency changes between 53 and 80% for various excess air ratios used in this study. By increasing excess air ratio, combustion efficiency decreases. Coal particle diameter value has more significant effect on combustion efficiency than to inlet bed pressure value for pilot-scale CFB combustor as excess air ratio increases. The present study also proves that CFB combustion allows clean and efficient combustion of coal.
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