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Show 2.76 2.60 2.26 2.00 1.76 1.60 1.26 NOx vs AIR TEMPERATURE CONVENTIONAL BURNER RELATIVE NOX LEVEL / / ) 100 200 300 400 600 600 700 BOO AIR TEMPERATURE (DEG F) certain parameters while all other parameters are held constant, and also provides the ability to evaluate the impact of changing one parameter for any combination of values for the constant parameters. Figure X References S u m m a ry The permitting process and the ability to evaluate test facility data to predict field N O x levels requires a thorough understanding of how changing certain operating parameters will impact N O x formation. The older method of using "correction curves" without regard to the values of the non-changing parameters, could at best provide only general information and trends. While it would be nice to have one set of correction curves that provide "multipliers" for correction of N O x levels, it is impossible to account for all of the inner dependencies of the parameter in this manner. Changing the value of any of the "constant" parameters will result in a different set of correction curves. The availability of a large data base has made it possible to use the Process Insights software to build a model for predicting N O x levels from internal flue gas recirculation burners. The model provides the ability to evaluate the effect of changing Martin, Richard R., and Reed, R. D., Chemical Engineering Process Magazine, Pollution Control Practices: Generated, December 1978 H o w N O T is Neuffer, William J., Alternative Control Technology Document - Control of N O x Emissions from Process Heaters Emissions Standards Division, U. S. Environmental Protection Agency, Office of Air and Radiation, Office of Air Quality Planning and Standards, April 1993 Martin, Richard R., and Johnson, William M., John Zink Company, N O x Control in Fired Heaters, Technical Paper 4200, March 1984 Martin, Richard R., John Zink Company, Burner Design Parameters for Flue Gas N O x Control, Technical Paper 4010, 1981 11 |