Abstract: In a power generation facility (10) wherein a fluidized bed combustion unit (12) produces steam to power a steam turbine generator (32), a heat recovery steam generator (20) produces steam for the steam turbine generator. Electrical power from the steam turbine generator is conducted to a motor (40) that drives and air compressor (36). The air compressor provides pressurized air back to the fluidized bed combustion unit (12) to promote fuel combustion. Flue gas from the heat recovery steam generator is selectively conducted to a CO2 capture unit (18) and then to a gas expander (42) that assists the motor in driving the air compressor (36). A heat exchanger (46) that is upstream of the CO2 Capture Unit and a heat exchanger (56) that is downstream of the CO2 Capture Unit and upstream of the air expander have thermal fluid sides that are connected in a closed circuit.

Abstract: In a power generation facility (10) wherein a fluidized bed combustion unit (12) produces steam to power a steam turbine generator (32), a heat recovery steam generator (20) produces steam for the steam turbine generator. Electrical power from the steam turbine generator is conducted to a motor (40) that drives and air compressor (36). The air compressor provides pressurized air back to the fluidized bed combustion unit (12) to promote fuel combustion. Flue gas from the heat recovery steam generator is selectively conducted to a CO2 capture unit (18) and then to a gas expander (42) that assists the motor in driving the air compressor (36). A heat exchanger (46) that is upstream of the CO2 Capture Unit and a heat exchanger (56) that is downstream of the CO2 Capture Unit and upstream of the air expander have thermal fluid sides that are connected in a closed circuit.

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.

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.