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AssigneeButtner Gesellschaft fur Trocknungs-und Umwelttechnik GmbH
InventorsKarl-Friedrich Bahner, Dagmar Bautzmann, Wolfgang Schroder
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Directly heated rotary drums are used in the drying of pourable goods such as wood chips or strands. Drums are provided with built-in fixtures such as cross fixtures, in order to ensure good heat transmission from the drying gas to the goods. The invention comprises a design for a rotary drum (4) which enables good transmission of drying gas to the goods and which is cheap to produce and assemble in comparison with cross fixtures. According to the invention the built-in fixtures in the rotary drum (4) extend radially in the direction of the middle of the drum, starting from the perimeter, over an area of 60 to 85% of the radius of the rotary drum (4), form at least two pockets, and run, apart from the area close to the perimeter, substantially in the direction of rotation (25), in front of the radial starting from their point of attachment. These radially shaped built-in fixtures enable constant distribution of the goods over the cross-section and are substantially cheaper to manufacture and assemble.
A rotary drum for the drying of pourable products with at least one set of baffles distributed around an interior of the rotary drum and extending in an axial direction, the baffles starting at a periphery of the drum and extending in ray-shape in a direction of a drum center over a length of 60 to 85% of a radius of the rotary drum, said baffles forming at least two pockets and relatively a region at which each baffle is connected at the periphery projecting ahead of the respective radius in a direction of rotation from a respective fastening point.
Dependencies are inferred from the claim text.