Gas turbine and steam turbine installation

A turbine installation, comprising:

• a gas turbine having a combustion chamber and a flue gas side;
• a steam turbine having a water/steam cycle;
• a waste-heat steam generator connected downstream of said flue gas side of said gas turbine, said waste-heat steam generator having heating surfaces connected into said water/steam cycle of said steam turbine;
• a fuel line;
• a gasification device for providing gasified fuel, said gasification device being connected upstream of said combustion chamber of said gas turbine via said fuel line;
• a saturator cycle for guiding a waterflow;
• a saturator connected into said saturator cycle and into said fuel line, said saturator guiding the gasified fuel in a counterflow to the water flow guided in said saturator cycle;
• a saturator-water heat exchanger connected, with a secondary side thereof, into said saturator cycle, said saturator-water heat exchanger being supplied, on a primary side thereof, with feed water extracted from said water/steam cycle of said steam turbine, said saturator-water heat exchanger heating the water flow and cooling the feed water;
• an air separation unit connected upstream of said gasification device;
• an air compressor;
• an extraction air line connecting said air compressor to said air separation unit for providing a partial flow of compressed air to said air separation unit;
• a feed water tank allocated to said waste-heat steam generator;
• a feed water line connecting said saturator-water heat exchanger at an outlet side thereof to said feed water tank;
• and
• a further heat exchanger connected with a primary side thereof in said extraction air line, said further heat exchanger being connected with a secondary side thereof into said feed water line, and said further heat exchanger heating the feed water and cooling the partial flow of compressed air.