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
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
200102* -- Fossil-Fueled Power Plants-- Power Cycles
200202 -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
AIR POLLUTION CONTROL
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COMBINED-CYCLE POWER PLANTS
COMBUSTORS
COMPRESSORS
DESIGN
DESULFURIZATION
ENERGY SOURCES
FLUIDIZED-BED COMBUSTORS
FOSSIL FUELS
FOSSIL-FUEL POWER PLANTS
FUELS
GAS TURBINES
HEAT EXCHANGERS
MACHINERY
MATERIALS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POWER PLANTS
STEAM TURBINES
SULFUR COMPOUNDS
SULFUR OXIDES
THERMAL POWER PLANTS
TURBINES
TURBOMACHINERY