Method and apparatus for detecting combustion conditions in combustors of a sequential combustion gas turbine engine
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02C-009/26
F23N-005/00
F02C-003/34
F02C-009/28
F23N-001/08
F23C-009/00
출원번호
US-0647566
(2012-10-09)
등록번호
US-9429079
(2016-08-30)
우선권정보
CH-1676/11 (2011-10-14)
발명자
/ 주소
Guethe, Felix
Stankovic, Dragan
Gumprecht-Liebau, Meike
출원인 / 주소
GENERAL ELECTRIC TECHNOLOGY GMBH
대리인 / 주소
Buchanan Ingersoll & Rooney PC
인용정보
피인용 횟수 :
1인용 특허 :
6
초록▼
In a method for operating a gas turbine (10), a CO2-containing gas is compressed in a compressor (13), the compressed gas is used to burn a fuel in at least one subsequent combustion chamber (14, 18), and the hot combustion gases are used to drive at least one turbine (17, 21). Improved control and
In a method for operating a gas turbine (10), a CO2-containing gas is compressed in a compressor (13), the compressed gas is used to burn a fuel in at least one subsequent combustion chamber (14, 18), and the hot combustion gases are used to drive at least one turbine (17, 21). Improved control and performance can be achieved by measuring the species concentration of the gas mixture flowing through the gas turbine (10) at several points within the gas turbine (10) by a distributed plurality of species concentration sensors (22; 22a-1; 23), and utilizing the measured concentration values to control the gas turbine (10) and/or optimize the combustion performance of the gas turbine (10).
대표청구항▼
1. A method for operating a gas turbine, in which turbine a CO2-containing gas is compressed in a compressor, the compressed gas being used to burn a fuel in a first combustor having first burners to form hot combustion gas that is fed to a first turbine to drive the first turbine, the gas turbine a
1. A method for operating a gas turbine, in which turbine a CO2-containing gas is compressed in a compressor, the compressed gas being used to burn a fuel in a first combustor having first burners to form hot combustion gas that is fed to a first turbine to drive the first turbine, the gas turbine also comprising a second combustor having second burners downstream of the first turbine that forms hot combustion gas that is fed to a second turbine to drive the second turbine, the method comprising: measuring species concentrations of a gas mixture flowing through the gas turbine at several points within the gas turbine with a distributed plurality of species concentration sensors, the species comprising O2 and at least one other specie; andcontrolling the gas turbine, optimizing the combustion performance of said gas turbine, or both, based on the measured species concentration values, the controlling of the gas turbine, optimizing the combustion performance of the gas turbine, or both based on the measured species concentration values comprising: controlling fuel supply valves that are adjustable to facilitate a flow of fuel to the second burners to control a flow of fuel to the second combustor based on a measurement of an O2 profile of the gas mixture flowing through the gas turbine that is based on measurements from the species concentration sensors located adjacent to at least one of an outlet of the first turbine and in the first combustor. 2. The method according to claim 1, wherein the measuring of the species concentrations comprises: measuring O2 concentration, CO2 concentration, CO concentration, NOx concentration, and H2O concentration of the gas mixture with said plurality of species concentration sensors. 3. The method according to claim 1, wherein said species concentration sensors comprise ZrO2 sensors. 4. The method according to claim 1, wherein said species concentration sensors consist of ZrO2 sensors. 5. The method according to claim 1, wherein the gas turbine is a sequential-combustion turbine in which at least part of flue gas at an exit of the gas turbine is recirculated and enters the compressor after being mixed with fresh gas. 6. The method of claim 1, wherein the at least one other specie of the species comprises at least one of CO2, CO, NOx, and H2O. 7. The method according to claim 5, wherein the first turbine includes a temperature probe at an outlet of the first turbine, and wherein: measuring the species concentrations comprises measuring an O2 profile downstream of and in proximity to the temperature probe, to identify rich and lean zones in a first combustor. 8. The method according to claim 7, wherein measuring the species concentrations comprises measuring O2 concentration at atmospheric pressure with fresh air as a reference. 9. The method according to claim 5, wherein measuring the species concentrations comprises measuring inside a-first combustor. 10. The method according to claim 9, further comprising: determining local values of a flame temperature based on said measuring at least the species concentrations of O2. 11. A gas turbine comprising: a compressor;a first combustor with a first combustion chamber and first burners;a first turbine downstream of said first combustor;a second combustor with a second combustion chamber and second burners downstream of said first turbine;a second turbine downstream of said second combustor;an inlet upstream of the compressor and a flue gas exit downstream of the second turbine;a recirculating device configured and arranged to recirculate part of the flue gas from the flue gas exit to the inlet;a plurality of species concentration sensors arranged within a gas flow of the gas turbine, the species concentration sensors configured to measure at least O2 concentration of the gas flow and concentration of at least one other species of the gas flow; anda control unit configured and arranged to control operation of the gas turbine, the species concentration sensors being in signal communication with the control unit; andwherein the control unit is configured to control fuel supply valves that are adjustable to facilitate a flow of fuel to the second burners to control a flow of fuel to the second combustor based on a measurement of an O2 profile of the gas flow that is based on measurements from the species concentration sensors located adjacent an outlet of the first turbine. 12. The gas turbine according to claim 11, further comprising: a fuel supply for the second burners; andfuel supply valves at the fuel supply of the second burners;wherein said fuel supply valves are in communication with said control unit, and said control unit is configured and arranged to operate said fuel supply valves based on measurements of said species concentration sensors. 13. The gas turbine according to claim 12, wherein the first turbine includes an outlet, and further comprising: a first temperature probe at an outlet of the first turbine;wherein said species concentration sensors are arranged at distributed circumferential positions with respect to an axis of the gas turbine and downstream of and in proximity to the first temperature probe. 14. The gas turbine according to claim 12, wherein said plurality of species concentration sensors are arranged at distributed circumferential positions with respect to an axis of the gas turbine, and inside the first combustor. 15. The gas turbine according to claim 11, wherein said species concentration sensors comprise ZrO2 sensors. 16. The gas turbine according to claim 11, wherein said species concentration sensors consist of ZrO2 sensors. 17. The gas turbine of claim 11, wherein the species concentration sensors located adjacent an outlet of the first turbine are arranged in a circumferential distribution adjacent the outlet of the first turbine. 18. A gas turbine comprising: a compressor;a first combustor with a first combustion chamber and first burners;a first turbine downstream of said first combustor;a second combustor with a second combustion chamber and second burners downstream of said first turbine;a second turbine downstream of said second combustor;an inlet upstream of the compressor and a flue gas exit downstream of the second turbine;a recirculating device configured and arranged to recirculate part of the flue gas from the flue gas exit to the inlet;a plurality of species concentration sensors arranged within a gas flow of the gas turbine, the species concentration sensors configured to measure at least O2 concentration of the gas flow and concentration of at least one other species of the gas flow; anda control unit configured and arranged to control operation of the gas turbine, the species concentration sensors being in signal communication with the control unit; andwherein the control unit is configured to control fuel supply valves that are adjustable to facilitate a flow of fuel to the second burners to control a flow of fuel to the second combustor based on a measurement of an O2 concentration of the gas flow that is measured in the first combustor by the species concentration sensors located in the first combustor. 19. The gas turbine of claim 18, wherein the species concentration sensors located in the first combustor are arranged in a circumferential distribution in a circumferential distribution.
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