Importance

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Abstract

An integrated power plant (10) comprises a gas-turbine set (11) with a compressor (12), a combustion chamber (13) and a gas turbine (14), a heat-recovery boiler (43) arranged downstream of the gas turbine (14), and a water/steam circuit (49) with a steam turbine (26), a condenser (42), a feedwater tank (33) and a separately fired steam generator (21) having a flue-gas NOx-reduction unit (23) arranged on the flue-gas side downstream of the steam generator (21), the heat-recovery boiler (43) for the generation of steam being incorporated in the water/steam circuit (49). In such a power plant, in order to improve the part-load behavior, a branch line (51) is provided at the heat-recovery boiler (43), by means of which branch line (51) a predetermined portion of the exhaust gases coming from the gas-turbine set (11) and flowing through the heat-recovery boiler (43) can be branched off and added upstream of the flue-gas NOx-reduction unit (23) to the flue gases coming from the steam generator (21).

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First Claim