Method and device for the operation of a gas turbine

摘要

In the case of a coal dust fired gas turbine plant with direct hot gas ignition an inertial filter (6) is arranged between the combustion chamber (5) and the first turbine stage (7), in which filter a curved flow, for example a circular flow, is induced, which filters out the heavy hot gas ash particles on the inertial and/or centrifugal force principle. The first turbine stage thereby admits only purified hot gas which no longer contains any larger ash particles which might attack erosively the rotor and guide blades of the turbine. The inertial filter (6) is preferably composed of highly compacted, heat-resistant ceramic and creates a filter action without significant throttle effect and without the insertion of a physical filter element, giving a gas turbine (7, 8) good efficiency with improved service life. <IMAGE>