| 摘要 |
When a cold water introducing tube (4) communicating with a plurality of spiral tubes (101) is connected to a hot water extracting tube (5) in a corrugated spiral tube heat exchanger (1), a steam supplying tube (2) communicating with a shell and a drain tube (3) are also connected. A passage (46) communicating with the cold water introducing tube (4) and some of the spiral tubes (101a) is also provided between the cold water introducing tube (4) and the spiral tubes (101), and a valve (44) is provided that is closed when force acting on the cold water introducing tube (4) and the other spiral tubes (101b) from the cold water introducing tube (4) side is greater than the force acting from the spiral tube (101b) side and communication has been reduced. |
