초록 ▼

A method according to the invention or a corresponding device (1) provides for dividing exhaust gas (9) exiting the gas turbine into a first (11) and a second partial stream (13), for mixing the first partial stream (11) with combustion air (15), and for channeling the resulting mixture (17) to the

A method according to the invention or a corresponding device (1) provides for dividing exhaust gas (9) exiting the gas turbine into a first (11) and a second partial stream (13), for mixing the first partial stream (11) with combustion air (15), and for channeling the resulting mixture (17) to the combustion chamber (5) and the second partial stream (13) to a carbon dioxide precipitation plant (21). In an advantageous embodiment the exhaust gas (9) exiting the gas turbine (3) is previously used to generate process steam (31) for a steam turbine (33) (gas and steam power station) then cooled before the exhaust gas (9) is divided into said partial streams (11,13). Water (29) precipitating during cooling is removed.

대표청구항 ▼

The invention claimed is: 1. A method for operating a gas turbine with a fossil-fuel fired combustion chamber comprising: dividing exhaust gas exiting the gas turbine into a first and a second partial stream; mixing the first partial stream with combustion air; channeling the resulting mixture back

The invention claimed is: 1. A method for operating a gas turbine with a fossil-fuel fired combustion chamber comprising: dividing exhaust gas exiting the gas turbine into a first and a second partial stream; mixing the first partial stream with combustion air; channeling the resulting mixture back to the combustion chamber; feeding the second partial stream to a carbon dioxide precipitation plant; wherein the exhaust gas is cooled before being divided into the first and second partial stream and water forming during this process is removed; wherein cooling of the exhaust gas takes place in at least a first and a second cooling stage; and wherein the exhaust gas is channeled after exiting the gas turbine to a waste-heat steam generator for generating process steam for a steam turbine, then to the first cooling stage. 2. A method according to claim 1, wherein the first cooling stage is operated by means of a coolant which is also used as a coolant of a condenser into which expanded steam exiting the steam turbine is introduced. 3. A method according to claim 1, wherein the carbon dioxide precipitation plant incorporates a cooling process for cooling the second partial stream. 4. A method according to claim 1, wherein carbon dioxide precipitated by the carbon dioxide precipitation plant is channeled to a storage facility. 5. A method according to claim 4, wherein the carbon dioxide is stored in a liquid or solid aggregate state. 6. A device for operating a gas turbine with a fossil-fuel fired combustion chamber comprising: a branching device dividing exhaust gas exiting the gas turbine into a first and a second partial stream; a mixing device for mixing the first partial stream with combustion air and channeling the resultant mixture stream to the combustion chamber; a carbon dioxide precipitation plant adapted to be fed by the second partial stream; and a cooling device located upstream of the branching device to cool the exhaust gas and to remove water precipitated during this process, wherein the cooling device has at least a first and a second cooling stage; and a waste-heat steam generator located downstream of the gas turbine and upstream of the first cooling stage adapted to generate process steam for a steam turbine. 7. A device according to claim 6, further comprising a condenser located downstream of the steam turbine, the first cooling stage being capable of being operated by a coolant which is also used as a coolant of the condenser. 8. A device according to claim 6, wherein the carbon dioxide precipitation plant is embodied as a refrigeration plant to cool the second partial stream. 9. A device according to claim 6, further comprising: a storage facility in which carbon dioxide precipitated by the carbon dioxide precipitation plant can be stored. 10. A device according to claim 9, wherein the storage facility is embodied for storing at least one of the group of liquid and solid carbon dioxide. 11. A method according to claim 1, wherein the carbon dioxide precipitation plant incorporates a cooling process for cooling the second partial stream. 12. A method according to claim 1, wherein carbon dioxide precipitated by the carbon dioxide precipitation plant is channeled to a storage facility. 13. A device according to claim 10, wherein the storage facility is embodied for storing frozen carbon dioxide. 14. A device according to claim 6, wherein the carbon dioxide precipitation plant is embodied as a refrigeration plant to cool the second partial stream.