Patent ID: 7926432
Filing Date: 2011-04-19
Classification: F23C,F23D

Abstract:
1. A method of operating a Cyclone furnace steam generator having front, rear and side walls and a plurality of Cyclone furnaces for combusting a fuel, the Cyclone furnaces arranged along at least one of the front and rear walls of the steam generator, and a plurality of over fire air (OFA) ports arranged along at least one of, or both of, the front wall and the rear wall at a higher elevation above the plurality of Cyclone furnaces, comprising the steps of: providing a portion of the total air for combustion to the Cyclone furnaces, outer Cyclone furnaces adjacent the side walls being provided with a higher air/fuel ratio than that air/fuel ratio provided to inner Cyclone furnaces located further away from the side walls; and providing the balance of the total air for combustion to the OFA ports.