| 摘要 |
PURPOSE:To be able to fuel NOx and control the generation of NOx by mixing water vapor generated in a boiler into fluidization air supplied to fluidized bed burning equipment. CONSTITUTION:At a waste heat boiler 3, water vapor 4 is generated by recovering waste heat of a fluidized bed incinerator 1. The water vapor 4 is introduced into a vapor header 5 and a part of the vapor is used in a preheater 7 for forced draft air supplied by a forced draft fan as fluidization air for a fluidized bed incinerator 1; and on the other hand, the vapor is added and mixed into preheated forced draft air. Thereby, oxygen partial pressure is diluted by water vapor and NOx in burnt exhaust gas is able to be reduced by deoxidation resulting from water gas reaction and for example, when municipal waste is burnt, NOx concentration in burnt exhaust gas can be reduced under 80ppm by mixing of water vapor of which volume is about 20% of fluidization air volume. |
