LIMESTONE INJECTION REDUCES SO2 AND NOX EMISSIONS

Developed in response to the possibility of emission controls imposed by acid rain legislation, the Foster Wheeler limestone injection method can also be used in boilers that must fire low-sulfur coal to meet current emissions limits. Although it was originally designed strictly for NO//x control and has now been adapted to SO//2 reduction, the low-NO//x burner also has advantages unrelated to environmental protection. These include better flame stability and greater turn-down capability than older turbulent burners, complete flame shaping control, and less excess air.