Carbon Dioxide Capture Interface and Power Generation Facility
AssigneePFBC Environmental Energy Technology, Inc.
InventorEsko Olavi Polvi
Life of this patent
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Abstract
An interface for a pressurized fluidized bed combustion facility is disclosed that enables future addition of carbon dioxide capture technology to capture facility flue gas emissions. The interface includes a gas to water pressurized heat recovery steam generator to cool facility flue gas and provide steam to the facility steam turbine generator. A VFD motor and flue gas expander are coupled to a combustion air compressor to energize the facility. The expander is synchronized over a SSS-clutch to drive the compressor. The interface in combination with carbon capture technology and methods for conditioning flue gas are also disclosed.
Claims20
An interface ready for addition of carbon dioxide capture from the flue gas of a pressurized fluidized bed combustion facility comprising:
- a combustion air compressor, configured to supply combustion air to the combustion facility;
- a VFD motor coupled to the compressor;
- a gas to water pressurized heat recovery steam generator configured to cool pressurized flue gas from the combustion facility and provide steam to a steam turbine generator of the combustion facility;
- a feedwater heat exchanger for preheating feedwater of the combustion facility and cooling the pressurized flue gas;
- a pollutant reduction unit configured to remove pollutants from the cooled pressurized flue gas from the feedwater heat exchanger;
- and
- a flue gas expander driven by the flue gas from the pollutant reduction unit, wherein the expander is synchronized over a SSS-clutch to drive the compressor.
A method to condition pressurized flue gas from a pressurized fluidized bed combustion facility to supplement the power needed to run the combustion facility comprising:
- reducing the temperature of flue gas from the combustion facility in a gas to water pressurized heat recovery steam generator;
- providing steam from the heat recovery steam generator to a steam turbine generator of the combustion facility;
- reducing the temperature of pressurized flue gas from the heat recovery steam generator in a feedwater heat exchanger;
- reducing pollutants from the flue gas;
- and
- expanding the flue gas in a gas expander to drive a compressor, wherein the compressor generates compressed air to fuel the combustion facility.
An interface for reducing emissions from a pressurized fluidized bed combustion facility comprising:
- a combustion air compressor configured to supply combustion air to the combustion facility;
- a gas to water pressurized heat recovery steam generator configured to cool pressurized flue gas from the combustion facility and provide steam to a steam turbine generator of the combustion facility;
- a feedwater heat exchanger for preheating feedwater for the combustion facility and cooling the pressurized flue gas;
- a pollutant reduction unit configured to remove pollutants from the cooled pressurized flue gas from the feedwater heat exchanger and direct the flue gas to a pressurized carbon dioxide capturing process unit;
- and
- a flue gas expander driven by flue gas of the pressurized carbon dioxide capturing process unit to power the compressor.
Dependencies are inferred from the claim text.