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COAL GASIFICATION AND IMPACTS ON ALUMINA CFB CALCINER DESIGN

Perander, L. Förster, K. Gasafi, E. Klett, C. Orth, O. Koschnick, A.

This paper describes a gasification unit based on Outotec’s Circulating Fluidized Bed (CFB) technology and its interface with the Outotec CFB alumina calciner. Compared to many other technologies Outotec’s CFB based gasifier offers significant advantages in terms of fuel flexibility, capacity and conversion efficiency. The impacts on the calcination process with regards to equipment sizing, product quality and control concept are highlighted. Considerations and mitigation strategies that can be included in new calciner designs or retrofitted to existing units when converting to coal gas fuel are discussed.