| 摘要 |
PURPOSE:To prevent leakage of cooling air and to reduce the cost of driving power for blasting in the stage of feeding air to the granular material contained between double tori under rotation and cooling said material 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 with 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 airtightly sealed by a seal 50 for the outside, and when the opening approaches the chute 30, the water level is brought down to release the seal by the operations of 62, 63 provided to the gate 59, 60 of a gate device 56 then the granular material 41 is discharged through the chute 30 via the plate 23 and the opening 44. The opening 44 is sealed again by the gate device 57 when the opening passes by the chute 28.
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