Alstom Power’s Flash Dryer Absorber for Flue Gas Desulfurization

ALSTOM’s Flash Dryer Absorber (FDA) system is a dry FGD technology, which aims for simplicity and compactness. This first installation was in Poland at the 2×120 Mwe Lasiska site, and was commissioned in 1996. Since then there have been a number of important developments of technology, notably combination with an ESP, use of integrated lime hydration and use of ash from CFB as the reagent; supported by an ongoing test program. The technology also looks promising for the retrofit area. The combined full-scale plant for the removal of flyash and SO₂ can often be fitted into the space occupied by the existing electrostatic precipitators. There are seventeen commercial installations of FDA in various stages of operation, construction, and design.