| 摘要 |
Sterilization or other heat treatment of particulate slurries with a holding time at high temperature of the order of a few seconds, involves feeding the slurry continuously through a pre-heating scraped surface heat exchanger 2 to transfer a substantial proportion of the required sensible heat into the slurry, and subsequently feeding it continuously through a radiation field. The radiation field in the apparatus of Fig. 1 is of micro-waves fed into an enclosure 4, whereby the particles are subject to heating from the interior. The slurry may be passed over static mixing devices in its passage through the enclosure 4. Alternatively, use maybe made of an electron beam, or X-rays or gamma rays. After a short holding time for sterilization, the slurry is cooled in a further scraped surface heat exchanger 6. <IMAGE> |
