| 摘要 |
<p>1488519 Drying granular materials WHITLOCK Inc 20 Dec 1974 [17 May 1974] 55370/74 Heading F4G A plenum drying hopper for reducing the moisture content of a mass of granular material comprises a housing 12 enclosing a plenum chamber 13 and having an upper material inlet 14 and a lower material outlet 15, a gas inlet passage 16 part of which extends substantially through the plenum chamber 13 and has gas diffusion openings communicating with the plenum chamber throughout the length of the passage part, a gas outlet passage 17 spaced from the gas inlet passage 16 and heating means 18 disposed within the passage part for heating the gas immediately prior to movement of the gas from the passage part into the plenum chamber. As shown the passage part comprises a series of diverter cones 16B. The inlet passage 16 also comprises a lower diffuser cone 16A. The outer wall of the housing may be heated by heating means 19. The gas leaving the plenum flows through a dehumidifier 11 before being returned thereto. Temperature sensors 21 are provided for controlling the operation of the heaters via a safety control 20. In a modification gas enters the plenum chamber through a central member which is fed by two gas inputs and the gas outlet passage may comprise an annular duet forming the outer periphery of the plenum chamber (Fig. 2, not shown) or vice versa.</p> |
