| 摘要 |
PURPOSE: A multi-stage rotary drying apparatus is provided to improve stability and drying efficiency of the apparatus, and to reduce the length of the rotary drying apparatus while offering multi-purpose application. CONSTITUTION: A multi-stage rotary drying apparatus includes drums(103-107) having different diameters and a radial-shaped distribution device. The radial-shaped distribution device includes a distribution pipe(109), a distribution path(110), and a distribution outlet(111). The light granules among wet sludge(102) is dried by the distribution device. The rest sludge is dried through a second drum and a third drum. The dried granules are mixed with sludge. The mixed sludge is additionally dried in a fourth drum and a fifth drum. |
