Fluidized bed combustion: mixing and pollutant limitation

Other conference contribution, 1998

Despite the lack of published information, this review concentrates on processes in large circulating fluidized bed combustors, and especially on mixing between fuel and air. Largeconcentration differences may be present in the combustion chamber, but the concentration cannot be properly predicted. Mixing is important for combustion but also for sulphur capture through the formation of reducing zones. This and other factors influencing sulphur capture are discussed. Measurement of gas concentration in a CFB combustion chamber are shown, and various methods to reduce the emissions of N2O emission are presented.