Method of operating a gas and steam turbine plant

Abstract

A method of operating a gas and steam turbine plant includes operating a gas turbine with a fuel to produce an expanded working medium and generating steam for a steam turbine from heat contained in the expanded working medium leaving the gas turbine. A reducing agent and a supply of an adjustable quantity of carrier air are introduced into the working medium with a metering system, for catalytically cleaning the working medium. The quantity of carrier air is adjusted as a function of the type of fuel supplied to the gas turbine. The quantity of carrier air is controlled only with a first air compressor for gas fuel operation of the gas turbine and additionally with a second air compressor, connected in parallel with the first air compressor, for oil fuel operation of the gas turbine. A gas and steam turbine plant is also provided.

Dependencies are inferred from the claim text.