Sulfur capture in an atmospheric fluidized-bed combustor
Sulfur capture in an atmospheric fluidized-bed combustor (AFBC) both with and without recycle of fines elutriated from the bed was studied. Two empirical correlations, one by Babcock and Wilcox and the other by Westinghouse, correlate sulfur capture as a function of the calcium-to-sulfur mole ratio and gas residence time. Both correlations fit the experimental no-recycle results quite well. Of the limestones tested with no recycle, Vulcan Materials exhibits the best sulfur-capture performance. Data collected with Reed limestone indicates that recycle improves sulfur-capture compared with once-through performance. However, there is a decreasing effect on sulfur capture as the recycle rate is increased to large values. At 90% sulfur capture, the fractional reduction of fresh limestone feed attributable to recycle is 24 to 35% over a gas-residence time range of 0.7 to 0.4 s.
- Research Organization:
- Massachusetts Inst. of Tech., Oak Ridge, TN (USA). School of Chemical Engineering Practice; Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6780888
- Report Number(s):
- ORNL/MIT-322
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
42 ENGINEERING
COAL
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
PERFORMANCE
FOSSIL-FUEL POWER PLANTS
SULFUR
REMOVAL
SULFUR OXIDES
AIR POLLUTION CONTROL
ABUNDANCE
EXPERIMENTAL DATA
FLUE GAS
INDUSTRIAL PLANTS
LIMESTONE
CARBONACEOUS MATERIALS
CARBONATE ROCKS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
COMBUSTORS
DATA
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
GASEOUS WASTES
INFORMATION
MATERIALS
NONMETALS
NUMERICAL DATA
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POWER PLANTS
ROCKS
SEDIMENTARY ROCKS
SULFUR COMPOUNDS
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES
WASTES
200202* - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions
421000 - Engineering- Combustion Systems