| 摘要 |
PROBLEM TO BE SOLVED: To reduce pressure loss of drying gas while avoiding increase in the cost regarding equipment, operation and maintenance, and a height of a tower, in a drying tower having a counterflow type moving bed.SOLUTION: A drying tower 2 includes a tower type drying vessel 10 into which a dried object is charged from a top and through which the dried object is discharged from a bottom, and an obstacle 60 disposed in the drying vessel 10 in such a manner of reducing a flow passage area of the dried object so as to obstruct downward movement of the dried object. An inside of the drying vessel 10 is virtually partitioned into an upper drying chamber 10a and a lower drying chamber 10b at the boundary of obstacle 60, and a drying gas injection port 16 for introducing the drying gas and an exhaust port 17 for discharging the drying gas after coming in contact with the dried object are respectively provided in the upper drying chamber 10a and the lower drying chamber 10b. The exhaust port 17 of the lower drying chamber 10b is opened to a gap V formed below the obstacle, in which the dried object does not exist. |
