Retrofit NO x Control Options

Modifications to the combustion process have been the basis for NO_x control on new coal-fired power plants to meet federal New Source Performance Standards (NSPS) Promulgated in 1971 and revised in 1978. In the event that retrofit NO_x control is required on pre-NSPS plants, low-NO_x combustion will likely be the least cost approach, if such controls can be successfully applied to the wide diversity of these older utility boiler designs now in operation. A series of retrofit low-NOx combustion demonstrations supported by EPRI and electric utility companies are intended to establish the technical and economic feasibility of this approach.