| 摘要 |
<p>A heat exchanger for indirect heating or cooling of moist, tacky material is described, comprising a stationary drum with an internal hollow shaft or rotor with means for circulating heating or cooling medium, said rotor being encircled by annular bodies in the shape of ribs with a spiral, hollow space, the inner end of which communicates with the interior of the rotor, the outer end being closed.</p> |
