| 摘要 |
<p>Drying apparatus comprising a cylindrical drying vessel (4) the inner wall surface (2) of which constitutes a heat-transmitting surface, a heat-generating means (6) encircling the said vessel, and at least one rotary vane assembly (5) rotatably mounted in the vessel. The vane assembly has vane sections (5a) which leave between their circumferential edges and the said heat-transmitting surface an annular space (U) small enough to allow wet material to extend across it and contact the heat-transmitting surface without falling into said space. Each vane section extends obliquely upward in the direction opposite to the rotating direction, and the circumferential edge of each vane section extends through less than 360 degrees as viewed from above. All of the vane sections when rotating bear material on their upper surfaces to raise the material and enable it to be urged against the heat-transmitting surface under the influence of centrifugal force, thus causing it to continuously climb along the heat-transmitting surface for drying. <MATH></p> |
