| 摘要 |
<p>A deposit discharge system, comprising a discharge tube (10) having a suction port (12) opened so as to face a water bottom face (29), a straight tube part (13) extending upward from the suction port (12), and a discharge port (18) communicating with the straight tube part (13) and opened on the downstream side of a water storing place for draining the deposit (22) together with water stream, a crane device (36) capable of suspending a whole main tube part (14) of the discharge tube (10) positioned in the water storing place in the state of being submerged and having a vertical moving mechanism (39) vertically moving the suction port (12), and an air valve (40) provided in the discharge tube (10) for controlling the introduction and exhaust of air from the discharge tube (10) by opening and closing operation, wherein the discharge tube (10) is installed so as to pass, when the deposit (22) is discharged, through a dam banking (25) in the water storing place routing a position lower than a water level (21) of the water storing place.</p> |
