Combined cycle power plant with pressurized fluidized bed combustor
An improved combined cycle gas turbine and steam turbine power plant is disclosed in which the energy source for both the steam turbine portion of the system and the gas turbine portion is a pressurized fluidized bed combustor fueled by a carbonaceous fuel such as coal. Combustion gas discharged from the pressurized combustor is processed for minimal cleanup and temperature conditioning prior to passage through a heat exchanger to heat a stream of pressurized air for driving an air-gas turbine. Following the loss of sensible heat energy through the heat exchanger, the lower temperature combustion gas is expanded through a second, combustion gas turbine so that a portion of the remaining energy is extracted at a lower temperature, avoiding problems of hot gas corrosion and fouling within the turbine. A compressor, driven by one or both gas turbines, provides both the pressurized air supply for fluidization of the bed and the stream of air to the air-gas turbine. The fluidized bed contains fuel and sulfur-sorbing particles, the latter capturing and retaining sulfur oxide compounds to prevent emission thereof to the atmosphere. Heat exchangers located within the fluidized bed combustor serve as steam generating means for the steam turbine portion of the power plant.
- Assignee:
- General Electric Co
- Patent Number(s):
- US 4223529
- OSTI ID:
- 6548145
- Resource Relation:
- Patent File Date: Filed date 3 Aug 1979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COMBINED-CYCLE POWER PLANTS
DESIGN
AIR POLLUTION CONTROL
COAL
COMPRESSORS
DESULFURIZATION
FLUIDIZED-BED COMBUSTORS
FOSSIL-FUEL POWER PLANTS
GAS TURBINES
HEAT EXCHANGERS
STEAM TURBINES
SULFUR OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTORS
ENERGY SOURCES
FOSSIL FUELS
FUELS
MACHINERY
MATERIALS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POWER PLANTS
SULFUR COMPOUNDS
THERMAL POWER PLANTS
TURBINES
TURBOMACHINERY
200102* - Fossil-Fueled Power Plants- Power Cycles
200202 - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions