| 摘要 |
PURPOSE:To reduce the generation amount of NOx during combustion as well as denitrate the part of NOx in the exhaust gas of a baking furnace, by a method wherein plural introducing ports of combustion air are opened to the side wall of a calcination furnace and a fuel and combustion air are distributed in a partial manner. CONSTITUTION:Plural introducing ports 13a, 13b of combustion air are opened on the almost flat surface of the side wall of a calcination furnace 2. In supplying a fuel from supply apparatuses 6a, 6b toward introduced combustion air in calcining a stock powder, the fuel and the combustion air are distributed in a partial manner and an air ratio in at least one air introducing port is adjusted to 1.0 or less. By this combustion form, the generation of NOx is suppressed in combustion within the calcination furnace 2. In addition, a reductive gas generated in the air ratio prescribed introducing port is mixed with the part of the exhaust gas of a baking furnace to decompose and reduce NOx contained in the exhaust gas. |
