| US 7,490,472 B2 | ||
| Efficient combined cycle power plant with CO2 capture and a combustor arrangement with separate flows | ||
| Arne Lynghjem, Stavanger (Norway); Jon Jakobsen, Sola (Norway); Henrik Kobro, Stavanger (Norway); and Arnfinn Lund, Kvernaland (Norway) | ||
| Assigned to Statoil ASA, Stavanger (Norway) | ||
| Appl. No. 10/545,156 PCT Filed Feb. 09, 2004, PCT No. PCT/NO2004/000036 § 371(c)(1), (2), (4) Date Sep. 27, 2005, PCT Pub. No. WO2004/072443, PCT Pub. Date Aug. 26, 2004. |
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| Claims priority of application No. 20030682 (NO), filed on Feb. 11, 2003; and application No. 20031550 (NO), filed on Apr. 04, 2003. | ||
| Prior Publication US 2006/0112696 A1, Jun. 01, 2006 | ||
| Int. Cl. F02C 1/00 (2006.01); F02C 3/30 (2006.01); F02C 7/08 (2006.01); F02C 7/12 (2006.01) | ||
| U.S. Cl. 60—772 [60/775; 60/39.52; 60/806] | 20 Claims |
| 1. Method for increasing energy and cost efficiency of a combined cycle gas turbine power plant and for energy and cost effective
CO2 capture from a pressurized CO2 enriched flue gas, the method comprising:
at least one of providing and operating a gas turbine power plant comprising one or more gas turbine plants and/or a combined
plant of steam and gas turbine cycles, comprising one or more compressor units and one or more turbines and further comprising
a combustor;
cooling flue gas from the combustor and passing the flue gas through a cleaning unit, the method further including removing
at least substantial portions of CO2 content from the flue gas to obtain cleaned flue gas and reheating the cleaned flue gas and, together with pressurized steams,
driving the one or more turbines, and depressurizing the steam prior to being discharged to atmosphere; and
operating the combustor such that the combustor is working with two completely separate gas part streams, one of the two gas
part streams being kept completely isolated from the innards of a flame tube of the combustor, wherein a first gas part stream
is directed internally in the flame tube of the combustor and wherein a second gas part stream passes along an exterior of
the flame tube, the first gas part stream comprising additional air and re-circulated un-cleaned flue gas from the combustor
which is combusted together with fuel inside the flame tube, and the second gas part stream comprising cleaned flue gas which
is heated by the exterior of the flame tube while the flame tube is being cooled.
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