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AssigneeRwe Power Aktiengesellschaft
InventorsGeorg Berger, Peter Moser, Toni Rupprecht, Sandra Schmidt
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The invention relates to a method for operating a steam turbine power plant comprising at least one steam generator that is fueled by lignite, wherein the lignite is indirectly dried in a fluidized bed dryer that is heated at least partially with steam from the water-steam circuit of the steam generator. Said method is characterized in that the flue gas from the steam generator undergoes gas scrubbing to remove CO2 and that the energy required for the gas scrubbing is at least partially extracted from the drying process in the fluidized bed. The invention additionally relates to a device for creating steam from lignite comprising a drying system for the lignite and a device to scrub CO2 from the flue gas, wherein the drying process and the CO2 gas scrubbing are thermally coupled to each other.
A method for operating a steam turbine power plant having at least one steam generator which is fired with lignite, wherein the lignite is subjected to drying, preferably to indirect drying in a fluidized-bed drier which is heated at least partially with steam from the water-steam cycle of the steam generator, wherein the flue gas from the steam generator is subjected to gas scrubbing for the separation of CO2, and the energy which is required for the gas scrubbing is extracted at least partially from the drying.
A device for producing steam from lignite, comprising at least one drier for drying pit-wet lignite, at least one steam generator which is fired with the dried lignite, at least one steam turbine which is connected downstream to the steam generator, characterized by at least one device for CO2 scrubbing of the flue gas from the steam generator, comprising at least one absorber column for loading a solvent with CO2 from the flue gas, at least one desorber column for regeneration of the solvent and at least one reboiler which is associated with the desorber column, wherein the reboiler is connected to the vapor outlet of the drier.
Dependencies are inferred from the claim text.