Environmental assessment of stationary source NOx control technologies. Annual report no. 2, June 1977-June 1978

The report summarizes results of the 2nd year of an environmental assessment of stationary source NOx control technologies. The 2nd year effort focused on: (a) characterizing the baseline (uncontrolled) environmental impact of stationary combustion sources; (b) developing fuel consumption and NOx emission inventories and projecting these to the year 2000; (c) field testing selected stationary combustion sources to determine multimedia pollutant emissions under both baseline and controlled (for NOx) operation; (d) performing process engineering and environmental assessment studies of NOx controls applied to utility and industrial boilers and to gas turbines; (e) assembling and exercising reactive air quality models in systems analysis applications; and (f) developing source analysis models for environmental impact evaluation. The report summarizes program results in each of these areas. Preliminary NOx control technology analysis for utility boilers indicates that off-stoichiometric combustion and low NOx burners (LNB) are the preferred techniques for both retrofit and new applications. For coal firing, overfire air operation and LNB are both cost effective; LNB is preferred for new wall-fired boilers. For oil and gas firing, staged combustion with burners out of service is recommended.