Generic studies of advanced fluid bed air heater technology. Topical report Number 2. Task 2. Circulating fluid bed systems

Technical Report · Sun Sep 01 04:00:00 EDT 1985

OSTI ID:5924344

Garland, R V; Turek, D G

This Report presents the design and performance information for a circulating fluid bed (CFB) cogeneration plant. The CFB system conceptualized in this work utilizes the sensible heat from the circulating solids to indirectly heat compressed air, which is expanded in a hot air expander. The plant produces 18,776 kW net power, 248,866 lb/hr of process steam, and 717,468 lb/hr of process air while conforming to all air pollution regulations. The hot gases from the CFB are cooled by raising process steam and preheating the fan-fed air for solids fluidization and combustion. The exhaust air from the expander is used as process air and to superheat steam in a heat recovery unit. The CFB system operates with fine particles and high gas velocities in which solids are entrained in a turbulent bed. The solids, along with the hot flue gases, are discharged from the CFB combustor and enter two primary cyclones where the solids are collected. The hot gases leave at the top of the cyclones and enter the boiler bank while the collected hot solids are fed to two fluid bed heat exchangers. The solids sensible heat is transferred in the beds to high-pressure air, which is supplied by a gas turbine compressor. The cooled solids are then fed back to the CFB combustor where they are reheated with a continuous charge of combustion air and coal. Coal fed to the combustor through a single feed nozzle, combines with the combustion air, and is burned at a temperature of 1675/sup 0/F. The air is fed in two stages. Primary air enters through the grate at the bottom of the combustor while secondary air enters part way up. Limestone required for desulfurization is fed pneumatically near the bottom of the combustor. The cost compilation and economic analysis for the CFB concept are contained in Topical Report No. 6, which includes comparisons with other fluid bed systems. 47 figs., 32 tabs.

• Research Organization: Westinghouse Electric Corp., Concordville, PA (USA). Combustion Turbine Systems Div.
• DOE Contract Number: AC02-82CE40543
• OSTI ID: 5924344
• Report Number(s): DOE/CE/40543-2; ON: DE86009112
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
20 FOSSIL-FUELED POWER PLANTS
200100 -- Fossil-Fueled Power Plants-- Power Plants & Power Generation
AIR HEATERS
CARBONACEOUS MATERIALS
CARBONATE ROCKS
CHEMICAL REACTIONS
COAL
COGENERATION
COMBUSTION
COMBUSTORS
COMPRESSORS
CONCENTRATORS
COST
CYCLONE SEPARATORS
DEUS
ECONOMIC ANALYSIS
ECONOMICS
ENERGY
ENERGY RECOVERY
ENERGY SOURCES
ENERGY SYSTEMS
ENGINES
EQUIPMENT
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
FOSSIL FUELS
FUEL FEEDING SYSTEMS
FUEL SYSTEMS
FUELS
GAS COMPRESSORS
GAS TURBINES
HEAT
HEAT ENGINES
HEAT EXCHANGERS
HEAT RECOVERY
HEATERS
INERTIAL SEPARATORS
LIMESTONE
MACHINERY
MATERIALS
MODIFICATIONS
OXIDATION
POLLUTION CONTROL EQUIPMENT
POWER GENERATION
PROCESS HEAT
RECOVERY
RECYCLING
ROCKS
SEDIMENTARY ROCKS
SEPARATION EQUIPMENT
STEAM
STEAM GENERATION
THERMOCHEMICAL PROCESSES
TURBINES
TURBOMACHINERY