This paper presents the design aspects of CFB boilers, co-fired with biomasses, by considering the selection of steam conditions, process design and specifics of boiler auxiliary equipment selection, as well as, the emissions control systems for those biomass co-firing applications. In this context, the experience with CFB boilers working with high steam conditions was presented. Doosan Lentjes delivered cutting-edge CFB technology and flue gas cleaning (FGC) technology at the Provence CFB Power Station in Gardanne, France. Doosan Lentjes work formed part of a comprehensive coal-to-biomass conversion. This approach contributes to owner commitment to clean, high performance energy production, and is expected to reduce their CO2 balance by 600.000 tons per year. This CFB concept itself proved to sufficiently fulfil typical requirements on gaseous emissions without additional flue gas cleaning equipment (except bag house or ESP). Nevertheless, just in case due to specific local regulation very low emission limits are set up, the plant layout can be easily added by optional SNCR or SCR and lime or sodium bicarbonate powder injection to further reduce the low raw gas emissions of the biomass CFB combustion to figures of below 50 mg/Nm3 .

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• Doosan Lentjes

• Boiler

• Fabric Filter

• Precipitator

• Scrubber

• Article