US 11,719,155 B2
Method for operating gas turbine combustor
Yasunori Iwai, Yokohama Kanagawa (JP); Shinju Suzuki, Yokohama Kanagawa (JP); Masao Itoh, Yokohama Kanagawa (JP); Yuichi Morisawa, Yokohama Kanagawa (JP); and Yoshihisa Kobayashi, Yokohama Kanagawa (JP)
Assigned to TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION, Kawasaki (JP)
Filed by TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION, Kawasaki (JP)
Filed on Jun. 8, 2022, as Appl. No. 17/835,518.
Claims priority of application No. 2021-102469 (JP), filed on Jun. 21, 2021.
Prior Publication US 2022/0403791 A1, Dec. 22, 2022
Int. Cl. F02C 3/34 (2006.01); F02C 9/50 (2006.01); F23R 3/26 (2006.01); F02C 1/08 (2006.01); F23N 1/02 (2006.01); F02C 1/00 (2006.01)
CPC F02C 3/34 (2013.01) [F02C 1/08 (2013.01); F02C 9/50 (2013.01); F23R 3/26 (2013.01); F02C 1/005 (2013.01); F05D 2260/85 (2013.01); F05D 2270/092 (2013.01); F23N 1/02 (2013.01); F23N 2227/02 (2020.01); F23N 2241/20 (2020.01)] 10 Claims
OG exemplary drawing
 
1. A method for operating a gas turbine combustor including:
a casing;
a combustor liner which is disposed in the casing and combusts a fuel and an oxidant;
a fuel supply part which supplies the fuel to the combustor liner;
an oxidant supply part which supplies the oxidant to the combustor liner; and
a controller which controls a flow rate of the fuel supplied from the fuel supply part and a flow rate of the oxidant supplied from the oxidant supply part, the gas turbine combustor in which through a circulation system connecting an outlet of a turbine and the casing, an exhaust gas discharged from the turbine is circulated in the casing as a circulating gas, and the circulating gas is introduced into the combustor liner through through holes provided in the combustor liner, the method comprising:
circulating, before ignition in the gas turbine combustor, a mixed gas containing oxygen in a predetermined concentration as the circulating gas; and
circulating, in an operating time from a time of ignition in the gas turbine combustor to a time of a rated load of the turbine, from the time of ignition until reaching stable combustion conditions allowing stable combustion, a combustion gas as the circulating gas, the combustion gas being maintained a same oxygen concentration as an oxygen concentration in the mixed gas by controlling the flow rate of the fuel supplied from the fuel supply part and the flow rate of the oxidant supplied from the oxidant supply part by the controller.