June 2013

Special Report: Process/Plant Optimization

Successfully design fired heaters using ultra-low-NOx burners

Recent environmental regulations mandate that refinery and petrochemical industries reduce nitrogen oxide (NOx) emissions. Emissions legislations are constantly under review, and they differ from coun..

Recent environmental regulations mandate that refinery and petrochemical industries reduce nitrogen oxide (NOx) emissions. Emissions legislations are constantly under review, and they differ from country to country and sometimes even within the same country. New burner technologies have been developed to meet more stringent emissions requirements. Most of these new technologies use internal flue gas recirculation and fuel staging to reduce NOx. These burners are often referred to as ultra-low-NOx burners (ULNBs). The techniques used in ULNBs for reducing NOx emissions from process heaters affect key aspects of burner and heater performance. The existing guidelines for burner specificatio

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