| 摘要 |
A drying apparatus for removing moisture content from a substance to be dried, comprises peripheral wall means defining a working space for drying the substance, the peripheral wall means defining at least an inlet for charging the substance to be dried, an outlet for taking the dried substance therefrom and a drain, rotary spiral blade assembly disposed within the working space and having lower end, at which the substance accumulated on the bottom of the working space rides on a transporting surface of the rotary spiral blade assembly, the rotary spiral blade assembly being rotatable at a predetermined rotation speed sufficient for forcing the substance on the transporting surface to climb up toward the upper end of the rotary spiral blade assembly, and the rotary spiral blade assembly defining a path for falling the substance reaching at the upper end thereof down to the bottom, heating means associated with at least one of the peripheral wall means and the rotary spiral blade assembly for heating a surface interfacing with the substance while the substance travels on the transporting surface toward the upward end; and means located in opposition to the upper end of the rotary spiral blade assembly for forcing the substance reaching the upper end to fall down through the path.
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