Outlet steam monitoring system of steam-cooled gas turbine

摘要

PROBLEM TO BE SOLVED: To monitor a temperature change in outlet steam, and to detect something wrong with the cooling object in an early stage, pertaining to this outlet steam monitoring system for a steam cooling type gas turbine. ;SOLUTION: Steam is supplied to a combustor body 20 by a supply line 3 from a steam supply manifold 1, while the steam recovered from a recovery line 1, is recovered to a steam recovery manifold 5. At each recovery line 4, an outlet steam temperature is detected out of a temperature detector 8, inputting it into a control unit 10, and in this control unit 10, it is compared with the setting temperature, and when the temperature becomes more than the setting temperature, it is so judged as something wrong which is displayed on a display unit 11, while an alarm is emitted by an alarm device 12, and when the temperature is further goes up, flow rate of a flow control valve 15 is throttled, and if it exceeds the upper limit temperature, a shutoff valve 16 is controlled so as to close it. Therefore trouble in a cooling objective part is detectable in its early stages owing to a variation in the outlet steam temperature.;COPYRIGHT: (C)2000,JPO