저열량 합성가스를 이용한 가압 순산소 연소 시스템의 연소 특성 분석 연구
Investigation on Combustion Characteristics of Pressurized Oxy-fuel Combustion System using Low Calorific Value Syngas
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The aims of this research were to investigate combustion characteristics of lab-scale pressurized oxy-fuel combustion(POFC) system. In this study, the reactor, 800 mm long, was equipped with co-axial burner. Low calorific value syngas that is composed of mainly CO and H2 was used as fuel whereas pure oxygen was used as an oxidant. Thermal heat input to the reactor varied from 2.6 kW to 6.1 kW. The reactor pressure also increases from atmospheric up to 15 bar. The results show that as the pressure increase, the temperature of reactor decreases on the whole in all cases. A significant temperature drop was observed especially at the bottom section of the reactor that exist flame. In addition, the flame instability increases as the pressure increases. Furthermore NOx emissions increases from atmospheric up to 2 bar. However beyond 2 bar, NOx emission reduces as pressure increases. Lastly NO2 ratio in NOx also increases as pressure increases.
Abstract
The aims of this research were to investigate combustion characteristics of lab-scale pressurized oxy-fuel combustion(POFC) system. In this study, the reactor, 800 mm long, was equipped with co-axial burner. Low calorific value syngas that is composed of mainly CO and H2 was used as fuel whereas pure oxygen was used as an oxidant. Thermal heat input to the reactor varied from 2.6 kW to 6.1 kW. The reactor pressure also increases from atmospheric up to 15 bar. The results show that as the pressure increase, the temperature of reactor decreases on the whole in all cases. A significant temperature drop was observed especially at the bottom section of the reactor that exist flame. In addition, the flame instability increases as the pressure increases. Furthermore NOx emissions increases from atmospheric up to 2 bar. However beyond 2 bar, NOx emission reduces as pressure increases. Lastly NO2 ratio in NOx also increases as pressure increases.
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