PFBC (pressurized fluidized bed combustion) turbocharged boiler design and economic study: Volume 1, Executive summary: Final report

Technical Report · Sun Nov 01 04:00:00 EST 1987

OSTI ID:5691031

A coal combustion technology that promises to reduce the cost of electrical power is pressurized fluidized bed combustion (PFBC). Since a PFBC boiler is physically smaller than a conventional pulverized coal fired boiler with a flue gas desulfurization system (PC/FGD) and the same power rating shop assembly and modularized shipment to the power plant site can be considered. Modular construction can substantially reduce the overall design/construction time. Emission controls are equivalent to, or better than, conventional PC/FGD units, and the PFBC combustor can tolerate coals with a wider range of characteristics. Two PFBC plants and the reference PC/FGD plant were each to have four nominal 250 MW(e) units to be completed for start-up at one year intervals. To establish a well defined consistent design basis for all units, the turbine-generator and steam cycle of a recently constructed 250 MW(e) unit (designed by Fluor and built under Fluor construction management) was selected and made the common element in both of the PFBC plants and the reference PC/FGD plant. Steam conditions of 2400 psia, 1000/sup 0/F were to be identical for all units as were the steam flows for the design load range of 50% to steam turbine valves-wide-open with inlet steam pressure 5% over design pressure (VWO 5% OP). The study produced three plant designs - a 4-unit turbocharged PFBC using bubbling bed technology, a 4-unit turbocharged PFBC using circulating bed technology, and a 4-unit PC/FGD reference plant using conventional pulverized coal technology coupled with wet limestone scrubber technology. The hot gas clean-up system, operating at these more modest temperatures, is capable of reducing the particulate in the gas to a level which meets EPA/NSPS standards without further cleanup. With this level of cleanup, service conditions for the turbocharger turbine are tolerable in commercially available designs and materials. 48 figs., 14 tabs.

• Research Organization: BBC Brown Boveri, Inc., North Brunswick, NJ (USA); Combustion Engineering, Inc., Windsor, CT (USA); Decision Focus, Inc., Los Altos, CA (USA); Fluor Engineers, Inc., Chicago, IL (USA); Foster Wheeler Development Corp., Livingston, NJ (USA); Hoy Associates, Fetcham (UK)
• OSTI ID: 5691031
• Report Number(s): EPRI-CS-5487-Vol.1; ON: TI88920100
• Country of Publication: United States
• Language: English

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BOILERS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COMBUSTION
COMPRESSORS
CONSTRUCTION
COST ESTIMATION
DESIGN
DESULFURIZATION
DIAGRAMS
ECONOMIC ANALYSIS
ECONOMICS
ENERGY SOURCES
ENGINEERING DRAWINGS
FLUE GAS
FLUIDIZED BED BOILERS
FLUIDIZED-BED COMBUSTION
FOSSIL FUELS
FOSSIL-FUEL POWER PLANTS
FUELS
GASEOUS WASTES
HEAT EXCHANGERS
HOT GAS CLEANUP
MATERIALS
MODULAR STRUCTURES
OXIDATION
POWER PLANTS
PRESSURIZING
PURIFICATION
STEAM GENERATORS
SUPERCHARGERS
TECHNOLOGY ASSESSMENT
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES
TURBOCHARGERS
VAPOR GENERATORS
WASTES