Status of topping combustor development for second-generation fluidized bed combined cycles

Journal Article · Wed Jan 01 04:00:00 EST 1992 · Journal of Engineering for Gas Turbines and Power; (United States)

DOI:https://doi.org/10.1115/1.2906294· OSTI ID:5246248

Garland, R V; Pillsbury, P W ^[1]

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1. Westinghouse Electric Corp., Orlando, FL (US)

This paper reports that addition of a fluidized bed combustor to a high-efficiency combined cycle plant enables direct firing of inexpensive run-of-the-mine coal in an environmentally acceptable manner. To attain high thermal efficiencies, coal pyrolysis is included. The low heating value fuel gas from the pyrolyzer is burned in a topping combustion system that boosts gas turbine inlet temperature to state of the art while the pyrolyzer-produced char is burned in the bed. The candidate topping combustor, the multiannular swirl burner, based on a design by J.M. Beer, is presented and discussed. Design requirements differ from conventional gas turbine combustors. The use of hot, vitiated air for cooling and combustion, and the use of low heating value fuel containing ammonia, are two factors that make the design requirements unique. The multi-annular swirl burner contains rich-burn, quick-quench, and lean-burn zones formed aerodynamically rather than the physically separate volumes found in other rich-lean combustors. Although fuel is injected through a centrally located nozzle, the combustion air enters axially through a series of swirlers. Wall temperatures are controlled by relatively thick layers of air entering through the various swirler sections, which allows the combustor to be of all-metal construction rather than the ceramic often used in rich-lean concepts.

• OSTI ID: 5246248
• Journal Information: Journal of Engineering for Gas Turbines and Power; (United States), Journal Name: Journal of Engineering for Gas Turbines and Power; (United States) Vol. 114:1; ISSN 0742-4795; ISSN JETPE
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404 -- Coal
Lignite
& Peat-- Gasification
014000 -- Coal
Lignite
& Peat-- Combustion
20 FOSSIL-FUELED POWER PLANTS
200102* -- Fossil-Fueled Power Plants-- Power Cycles
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
AMMONIA
BURNERS
CALORIFIC VALUE
CARBONACEOUS MATERIALS
CHARS
CHEMICAL REACTIONS
COAL
COAL-FIRED GAS TURBINES
COMBINED-CYCLE POWER PLANTS
COMBUSTION
COMBUSTION PROPERTIES
COMBUSTORS
CONTROL
DECOMPOSITION
DESIGN
EFFICIENCY
ENERGY SOURCES
EQUIPMENT
FLUID FLOW
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GAS TURBINES
GASES
HYDRIDES
HYDROGEN COMPOUNDS
MACHINERY
MANAGEMENT
MATERIALS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
OXIDATION
POWER PLANTS
PROCESSING
PYROLYSIS
PYROLYSIS PRODUCTS
SYNGAS PROCESS
TEMPERATURE CONTROL
THERMAL EFFICIENCY
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES
TOPPING CYCLES
TURBINES
TURBOMACHINERY
VORTEX FLOW
WASTE MANAGEMENT
WASTE PROCESSING