Method for reducing burner exhaust emissions

摘要: NOx exhaust emissions from furnace or boiler burners are reduced by combusting fuel with low excess air (about 5 percent more than the theoretically required minimum volume). The is combusted so that maximum flame temperatures less obtainable temperature. This achieved cooling flames in chamber through contact combustion walls and central portions of two stages. Burners a vertically lower burner bank initially fired insufficient an upper additional to make up for deficiency burners. intermixed uncombusted such burned at later stage downstream spaced supplied row measured provide above stated total furnace.