Evaluation of the NO{sub x} reduction potential of various NO{sub x} control techniques on a 320MWe oil/gas fired boiler

Recent NO{sub x} emissions legislation in Italy requires that the NO{sub x} emissions from oil/gas fired utility boiler plant be reduced to 200 mg/Nm{sup 3} (corrected to 3 % oxygen) (0.130 lb/MMBtu). In the case of Azienda Energetica Municipale (Aem) Milano this must be achieved by the end of 1997. Aem Milano operate a 320 MWe opposed oil/gas fired boiler at their Cassano d`Adda facility. In order to determine the most cost effective approach of achieving a boiler NO{sub x} emission level of 200 mg/Nm{sup 3} Aem Milano entered into a tailored collaboration contract with the Electrical Power Research Institute (EPRI). Under contract to EPRI the Power Technology Department of PowerGen plc have undertaken studies to predict the NO{sub x} control potential of a wide range of NO{sub x} reduction techniques, and combinations thereof, when applied to Cassano d`Adda Unit 2. Furnace computational fluid dynamics modelling and limited boiler performance modelling aspects of the studies were undertaken by the Energy and Environmental Research Corporation (EERC).