| 摘要 |
PROBLEM TO BE SOLVED: To provide a dryer of an asphalt plant capable of more effectively controlling an exhaust gas temperature by rotation speed control of a drum and saving energy, and a rotation control method therefor. ! SOLUTION: The rotation speed of a drum 3 of a dryer 1 is made variable and a rotation direction can be freely switched between a forward rotation and a reverse rotation, at the same time approximately circular arc-shaped dam bodies 20 which partially dam and temporarily retain the flow of aggregates are intermittently provided circumferentially along the inner peripheral wall of the drum 3, and a retained aggregate amount is made not to be greatly varied even when the rotation speed of the drum 3 is changed. Also, at one end of each of the dam body 20, a guide piece 22 is provided, which pushes back the aggregates flowing down from the upstream side of the drum 3 during the forward rotation of the drum 3 to restrain the aggregates from passing through gaps between the respective dam bo |
