METHOD FOR OPERATING A GAS TURBINE AND GAS TURBINE FOR PERFORMING THE METHOD

摘要

In a method for operating a gas turbine, NOx is removed from the exhaust gases of the gas turbine by means of a selective catalysis device with the addition of NH3. The method achieves an extremely low NOx content while simultaneously achieving economic consumption of NH3 and avoiding NH3 in the exhaust gas by maintaining the NOx content of the exhaust gas at a constant level via a regulated return of a portion of the exhaust gas in varying operating conditions of the gas turbine, and by adjusting the addition of the NH3 in the selective catalysis device to the constant NOx level.

主权项

1. A method for operating a gas turbine, in which the method NOx is removed from the flue gases of the gas turbine by means of a selective catalysis device with addition of NH3, the method comprising:
keeping NOx content of the flue gases at a constant level by a controlled recirculation of part of the flue gases during changing operating conditions of the gas turbine, and adjusting the addition of the NH3 in the selective catalysis device to the constant NOx level.