| 摘要 |
In an apparatus for drying sludge and other materials of a porridge-like or paste-like consistency, said apparatus being of the kind comprising: (a) a rotating drum (1), open at both ends and adapted to be rotated about its at least roughly horizontal axis of symmetry, (b) substantially stationary means (2, 3) for introducing hot drying air into the apparatus, (c) supply means (12, 13) for introducing the material to be dried into the apparatus, and (d) separating means (4-6) for separating the material having been dried in the apparatus from the used drying air, the new feature consists in (e) such an arrangement, that the material to be dried is introduced directly onto the inside wall of the fire chamber of the apparatus, whereby the material and the drying air with a temperature of approximately 1000 DEG C are moved in co-current through the apparatus, so that the material is sterilized while at the same time being brought to give off water in the form of water vapour. With this arrangement, it is achieved partly that the material is sterilized and dried, partly that it is comminuted - especially by the use of scrapers (14) and stirring ribs (15) - so that a fine-grained dry product is produced. |
