Combustion Characteristics of 0.5 MW Class Oxy-Fuel FGR (Flue Gas Recirculation) Boiler for CO2 Capture

A 0.5 MW class oxy-fuel boiler was developed to capture CO2 from exhaust gas. We adopted natural gas as the fuel for industrial boilers and identified characteristics different those of pulverized coal, which has been studied power plants. also examined combustion without flue recirculation (FGR), is not commonly in plant boilers. Oxy-fuel involves a stretched flame that uniformly heats chamber. In oxy-natural-gas FGR combustion, water vapor included recirculated stabilized when oxygen concentration oxidizer 32% or more. While delay observed at partial load it other modes. flow rate fullness decrease but, except upstream region, temperature near wall distributed lower than air because effect radiation. For this while heat flux modes more 60% larger downstream region. When were employed boilers, 90% obtained, enabling capture, sequestration, performance satisfying regulations.