Importance

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Abstract

Disclosed is a combustion device and method for combusting granular, solid fuel, for example wood pellets. The combustion device includes a chamber having an outer wall and an inner wall, which inner wall divides the chamber into a combustion air space and a combustion chamber. Further, the combustion device includes at least one blast apparatus for providing primary combustion air and secondary combustion air and a rotating unit for rotating the combustion chamber. The inner surface of the combustion chamber includes a number of steps for lifting combustion fuel in the combustion chamber, when the combustion chamber is rotated. Further, primary combustion air is provided into the combustion chamber for contributing combustion of combustion fuel and for moving combustion fuel on the steps. In addition, secondary combustion air is provided into the combustion chamber for removing completely combusted fuel and/or combustion gases from the combustion chamber.

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First Claim