| 摘要 |
PROBLEM TO BE SOLVED: To provide a steam desuperheater improved in operation efficiency by connecting an outlet of a drain valve to a suction part of an ejector to prevent reduction of the operation efficiency of the steam desuperheater caused by a discharge of a surplus cooling fluid separated in a steam separator from the drain valve to the outside of a system. SOLUTION: The ejector 2 is disposed inside a pipe passage of a steam pipe 1, and the steam separator 4 is disposed in a steam pipe 3 downstream of the ejector 2. The ejector 2 comprises a nozzle 5 as a throttle part throttling a steam flow passage of the ejector 2, a suction chamber 6 as the suction part, and a diffuser part 7 broadening toward the end. A cooling fluid injection part 8 injecting the cooling fluid is provided inside the nozzle 5 of the ejector 2. A drain pipe 10 is connected to a water outlet 9 of the steam separator 4, and the drain pipe 10 is disposed with a steam trap 11 as the drain valve. The drain pipe 10 on the side of an outlet 12 of the steam trap 11 is connected to the suction chamber 6 of the ejector 2. A surplus cooling fluid return part 13 returning the surplus cooling fluid separated in the steam separator is provided in the inside of the suction chamber 6 of the ejector 2. COPYRIGHT: (C)2004,JPO
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