Gas turbine combined plant and method of operating same

• Main Author: SUGISHITA HIDEAKI
• Format: Patent
• Language: English
• Published: 20.12.2006
• Subjects: AIR INTAKES FOR JET-PROPULSION PLANTS; BLASTING; COMBUSTION ENGINES; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS; ENGINE PLANTS IN GENERAL; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES; GAS-TURBINE PLANTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; METHODS OF STEAM GENERATION; STEAM ACCUMULATORS; STEAM BOILERS; STEAM ENGINE PLANTS; STEAM ENGINES; STEAM GENERATION; WEAPONS

A piping guides exhaust gas of a gas turbine to a heat recovery steam generator (HRSG). The piping is provided at a n outlet of the exhaust gas and is branched into two at a branch portion upstream of the HRSG, with one connected to a high-pressure superheater provided in the HRSG and the other connected to a regenerator. The exhaust gas supplied to the high-pressure superheater superheats saturated steam generated by a high-pressure evaporator in the HRSG. The exhaust gas supplied to the regenerator is heat-exchanged with the combustion air generated by a compressor in the gas turbine. The exhaust gas having been heat-exchanged is supplied to between the high-pressure superheater and the high-pressure evaporator via another piping extending between the regenerator and the HRSG.