| 摘要 |
PROBLEM TO BE SOLVED: To prevent an operation stop of a load machine by stopping the inflow of drain into a drain tank while suppressing a thermal loss.SOLUTION: A drain recovery system having a steam boiler 2, a seated type drain tank 4, an atmosphere opening type water replenishing tank 7 has an openable/closable first valve V1 arranged in a drain return line 3 of the drain tank 4, an openable/closable second valve V2 arranged in a drain releasing line 8 connected between an upstream side of the first valve V1 of the drain return line 3 and the water replenishing tank 7 is constituted so as to be able to select a first opening/closing state that the first valve V1 is opened and the second valve V2 is closed and a second opening/closing state that the first valve V1 is closed and the second valve V2 is opened. |
