| 摘要 |
A rotary dryer (1) for the drying of, for example, biological sludge, camprises a rotatable drum having rake elements (6) with openings for the passage of sludge disposed on the inner side of the drum casing. A drying plant with such a dryer further comprises a hot-gas plant (3) and one or more co-rotating drying zones (4,5).
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