| 摘要 |
PURPOSE:To prevent leakage of cooling air and to reduce the cost of driving power for blasting in the stage of cooling the granular material contained between double tori under rotation with air by sealing airtightly an air introducing part and a granular material discharging part with water. CONSTITUTION:A granular material 41 is charged from a chute 28 onto a freely vertically rotatable supporting plate 23 between double tori 20 and 21 under rotation and is conveyed toward an arrow 29. The material is cooled by the cooling air 42 fed from an air chamber 43 underneath the plate 23 and is discharged through an opening 44 onto a chute 30. The blast pipe 51 for the air 42 and the annular pipes 46, 47 of the chamber 43 are airtightly sealed by a water passage 49 for sealing. On the other hand, the opening 44 of the chamber 43 is sealed airtightly from a bottom cover 55 via a sealing member 54 by a driving device 49 for the bottom cover. The air 42 from the pipe 51 is thus effectively used for cooling the material 41 with substantially no leakage to the outside.
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