| 摘要 |
The drying drum is rotatably arranged in an outer box and houses materials to be dried. An air supply device supplies heated air into the drum and a heat exchanger cools air discharged from the drum by means of air taken from outside of the outer box to remove moisture from air discharged. The heat exchanger is formed by piling plates with pairs of closing plates interposed between and provided with multiple passages which are arranged alternately and perpendicularly to each other. The heat exchanger is so arranged that the fist passages are slanted inward toward the outer box by 45 degres relative to the vertical direction.
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