Deep cleaning Pittsburgh Seam coal for sulfur dioxide reduction: Coal Quality Development Center: Campaign report, Number 11: Interim report
Extensive laboratry- and commercial-scale tests to characterize the cleanability of a 1500-t (1360-metric-t) shipment of raw Pittsburgh Seam coal were performed. The investigation included raw-coal analyses, laboratory froth flotation testing, and commercial-scale flowsheet cleaning tests. The potential of coal curshing to liberate impurities and the ffect of coal cleaning on combustion characteristics was also evaluated. Crushing raw Pittsburgh Seam coal facilitates sulfur, but not ash, removal. Laboratory testing of coal crushed to topsizes smaller than 34 in. (19 mm) before cleaning showed significant reduction in potential SO/sub 2/ emissions at a given level of energy recovery. Tests indicated that deep cleaning greatly improved coal quality. In one test, deep cleaning increased coal heating value from 9328 to 13,922 Btulb (21,700 to 32,390 kJkg) dry basis, reduced ash content from 34,3 to 6.2% dry basis, and decreased the SO/sub 2/ emissions potential from 9.03 to 4.93 lbMBtu (3.88 to 2.12 kgkJ). The cost of low-sulfur coal has a substantial impact on the economics of deep cleaning. 18 refs., 12 figs., 18 tabs
- Research Organization:
- Electric Power Research Inst., Palo Alto, CA (USA)
- OSTI ID:
- 5206819
- Report Number(s):
- EPRI-CS-5549; ON: TI88920258
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
20 FOSSIL-FUELED POWER PLANTS
COAL
CLEANING
COST
CRUSHING
DESULFURIZATION
FOSSIL-FUEL POWER PLANTS
AIR POLLUTION ABATEMENT
SULFUR
REMOVAL
AIR POLLUTION
ASH CONTENT
BOILERS
COAL PREPARATION
COMBUSTION PROPERTIES
CYCLONE SEPARATORS
DEASHING
ECONOMICS
ELECTROSTATIC PRECIPITATORS
EMISSION
EPRI
EROSION
FLOTATION
FOULING
PITTSBURGH
PYRITE
SLAGS
SULFUR CONTENT
SULFUR DIOXIDE
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COMMINUTION
CONCENTRATORS
ELEMENTS
ENERGY SOURCES
EQUIPMENT
FEDERAL REGION III
FOSSIL FUELS
FUELS
INERTIAL SEPARATORS
IRON COMPOUNDS
IRON SULFIDES
MATERIALS
MINERALS
NONMETALS
NORTH AMERICA
OXIDES
OXYGEN COMPOUNDS
PENNSYLVANIA
POLLUTION
POLLUTION ABATEMENT
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
SEPARATION EQUIPMENT
SEPARATION PROCESSES
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
SULFUR OXIDES
THERMAL POWER PLANTS
TRANSITION ELEMENT COMPOUNDS
USA
010300* - Coal
Lignite
& Peat- Preparation- (1987-)
010800 - Coal
Lignite
& Peat- Waste Management
010900 - Coal
Lignite
& Peat- Environmental Aspects
200200 - Fossil-Fueled Power Plants- Waste Management
200106 - Fossil-Fueled Power Plants- Economics