| 摘要 |
A subsea drying system 10 for drying a chamber 12 underwater comprises: upstream piping 24 for conveying a pressurised drying fluid from a source 18 to the chamber 12; and downstream piping 40 for expelling liquid displaced from the chamber 12 by the drying fluid via an outlet 52 in an open-loop dewatering mode (figure 1). In a closed-loop dehumidifying mode, a recirculation path 54 between the downstream piping 40 and the upstream piping 24 conveys drying fluid exiting the chamber 12 back into the chamber 12 after passing through a dehumidifier 58. A valve system selectively closes and opens the recirculation path 54 to expel displaced liquid when that path is closed and to recirculate drying fluid from the chamber 12 through the dehumidifier 58 to the upstream piping 24 when that path is open. The system is of particular use for drying a hollow fitting prior to injecting grout to form a pipe repair. |
