| 摘要 |
PROBLEM TO BE SOLVED: To provide a grain dryer having a full dust exhausting capability preferred, even in a circumferential environment. SOLUTION: The circulation type grain dryer comprises a rotary valve 5 for alternatively forwardly and reversely rotating, to feed a grain, and a grain lifting spiral 7 for transferring the grain dropped from the valve 5 to an upper part to ventilate a hot air to a drying section for drying the grain. The dryer also comprises a dust exhausting unit 15 provided at the upper part of the spiral 7.
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