| 摘要 |
PROBLEM TO BE SOLVED: To provide a closed-type drain recovery system capable of preventing boiling of preheating water in an economizer. SOLUTION: The temperature of a drain in a drain tank 8 is detected by a temperature sensor 29. When reaching a set temperature, the make-up water of low temperature from a make-up water tank 15 is directly supplied to the drain serving as a liquid-phase part of the drain tank 8 through a liquid-phase water supply piping 17 in such a manner that the temperature of hot drain in the drain tank 8 is quickly lowered. The temperature of drain that is supplied to an economizer 2 from the drain tank 8 is rapidly lowered, to prevent boiling in the economizer 2. COPYRIGHT: (C)2012,JPO&INPIT |
