Preliminary design and assessment of circulating-bed boilers. Final report
The circulating bed boiler (CBB) represents an alternative, fluidized bed combustor (FBC) technology which offers distinct advantages over both the current FBC systems, and pulverized-coal boilers with scrubbers. This report describes the findings of a study undertaken to evaluate these advantages. The information obtained made it possible to identify potential CBB design and operating problems and to propose further plans for developing this technology. Several significant determinations resulted from the study. The circulating bed boiler capital costs should not exceed the cost for a conventional atmospheric fluid bed combustor, primarily due to the reduced combustor size; however, any cost advantage for a pressurized circulating bed boiler is questionable. Overall efficiency for an electric utility power plant using an atmospheric CBB should be increased by at least 1% over using a pulverized-coal boiler and the increase would be at least 3% using a pressurized CBB. The circulating bed boiler has several of the advantages of an FBC over pulverized coal, and in addition, it has turndown capabilities, greater throughput, and simplified feeding. Both the atmospheric and the pressurized CBB's can be designed with technology currently available in the process industry, but only after additional study and development has been completed for cyclones, pollution control, solids attrition, feed systems, and combustion reactions. Pilot plant studies are required for these investigations.
- Research Organization:
- Pullman Kellogg, Houston, TX (USA)
- OSTI ID:
- 5268614
- Report Number(s):
- EPRI-CS-1426
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
014000 -- Coal
Lignite
& Peat-- Combustion
42 ENGINEERING
421000* -- Engineering-- Combustion Systems
BOILERS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTORS
CONCENTRATORS
CYCLONE SEPARATORS
DATA
DATA FORMS
DESIGN
ENERGY SOURCES
EQUIPMENT
EVALUATION
EXPERIMENTAL DATA
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
FOSSIL FUELS
FUEL FEEDING SYSTEMS
FUEL SYSTEMS
FUELS
GRAPHS
INERTIAL SEPARATORS
INFORMATION
NUMERICAL DATA
OXIDATION
POLLUTION CONTROL EQUIPMENT
TABLES
THERMOCHEMICAL PROCESSES
014000 -- Coal
Lignite
& Peat-- Combustion
42 ENGINEERING
421000* -- Engineering-- Combustion Systems
BOILERS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTORS
CONCENTRATORS
CYCLONE SEPARATORS
DATA
DATA FORMS
DESIGN
ENERGY SOURCES
EQUIPMENT
EVALUATION
EXPERIMENTAL DATA
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
FOSSIL FUELS
FUEL FEEDING SYSTEMS
FUEL SYSTEMS
FUELS
GRAPHS
INERTIAL SEPARATORS
INFORMATION
NUMERICAL DATA
OXIDATION
POLLUTION CONTROL EQUIPMENT
TABLES
THERMOCHEMICAL PROCESSES