NOx Control for Utility Boiler OTR Compliance, (Final Report)

摘要

The objective of the program was to achieve a NOx level below 0.15 lb/106 Btu (with ammonia slip of less than 5 ppm) in the CEDF using PRB coal and B&Ws DRB-4Z low-NOx pulverized coal (PC) burner in combination with dual zone overfire air ports and Fuel Techs NOxOUT System. Commercial installations of B&Ws low-NOx burner, in combination with overfire air ports using PRB coal, have demonstrated a NOx level of 0.15 to 0.2 lb/106 Btu under staged combustion conditions. The proposed goal of the combustion system (no SNCR) for this project is a NOx level at 0.15 lb/106 Btu. The NOx reduction goal for SNCR is 25% from the low-NOx combustion emission levels. Therefore, overall NOx emissions would approach a level of 0.11 lb/106 Btu in commercial installation.