F - Mech Eng,Light,Heat,Weapons – 01 – D
Patent
F - Mech Eng,Light,Heat,Weapons
01
D
F01D 25/12 (2006.01) F01D 17/02 (2006.01) F01D 17/10 (2006.01) F01K 17/04 (2006.01) F01K 19/00 (2006.01) F01K 23/10 (2006.01) F02C 7/16 (2006.01)
Patent
CA 2364125
An apparatus and method for steam cooling a gas turbine. An intermediate-pressure drum 106 of a recovery boiler supplies outlet steam, as a cooling steam, to a combustor 117 through a steam channel 116. The flow rate of steam guided into the combustor 117 is adjusted through opening or closing of a first flow control valve 120 by a controller 125 such that the pressure of the intermediate-pressure drum 106 becomes a set value set according to a load status of a gas turbine 101. A required amount of steam according to the load status of the gas turbine 101 is fed to the combustor 117. Thus, the flow rate of steam guided into the combustor 117 is controlled by adjustment of the existing first flow control valve 120 for maintaining the pressure of the intermediate- pressure drum 106 in a predetermined state, without the need to provide an expensive valve device in the steam channel 116. 59
Hiramoto Koji
Kita Yoshiyuki
Tanaka Tomoka
Mitsubishi Heavy Industries Ltd.
Riches Mckenzie & Herbert Llp
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