Burner Criteria for NOx Control. Volume 2. Heavy-Oil and Coal-Fired Furnaces and the Evaluation of Radiative Heat Transfer Models

摘要

The report describes Phase II of a research program, the overall objective of which was to specify burner design criteria for minimum pollutant emissions from both pulverized-coal- and residual-fuel-oil-fired combustors. Phase II included both furnace investigations and the evaluation of radiative heat transfer models which could later be applied to the development of an analytical tool capable of predicting combustor performance; the models helped generalize the results obtained in the furnace experiments. The furnace investigation had three major objectives: providing further information on NOx formation in pulverized coal flames; extending the furnace investigations to include fuel oils; and identifying methods of satisfying combustor process requirements while minimizing NOx emissions through burner design. The report describes the development of several radiative heat transfer models and compares their predictive capabilities with both experimental results and hypothetical test cases.