セラミックス焼結炉における酸素富化燃焼と窒素酸化物の生成

概要

論文の詳細を見る
Oxygen-enriched air was supplied as the combustion air for two combustion-type experimental kilns in order to determine the effect of combustion conditions on the combustion characteristics, particularly the generation of nitrogen oxides. Calculations of the adiabatic equilibrium flame temperature and equilibrium NO concentration for a given air ratio indicated that as the oxygen content in the combustion air increases, both the temperature of the combustion gas and the equilibrium NO concentration increase. Similar calculations for a fixed temperature revealed that the effect of O_2 concentration is relatively small and that the NO emissions calculated as an absolute amount per unit of fuel consumed should decline. However, when enriched air was supplied to an experimental kiln, the concentration of NO in the exhaust gas, converted to a percentage of the equilibrium NO concentration at the maximum temperature recorded in the kiln, attained a relatively high value. It was thought that this increase in the NO concentration results from an increase in the combustion reaction rate when enriched air was used in place of ordinary air at a constant air ratio. Furthermore, the data indicated that the effect of the residence time of the combustion gas in the kiln on the concentration of NO, which is relatively unreactive, was significant. When the kiln temperature and air ratio were held at almost the same conditions, a decrease in the fuel gas flow rate produced an increase in the NO value. Oxygen-enriched air may be used in the firing of fine ceramics to attain extremely high kiln temperatures with energy savings.
社団法人日本セラミックス協会の論文
1988-10-01

セラミックス焼結炉における酸素富化燃焼と窒素酸化物の生成

スポンサーリンク

概要

著者

関連論文

スポンサーリンク