Economics of spray-dryer FGD system: the two-stage open-loop processes

Technical Report · Mon Jun 01 04:00:00 EDT 1981

OSTI ID:6263084

Burnett, T A; O'Brien, W E

Preliminary economics of the Rockwell International Corporation - Wheelabrator Frye, Inc., (RI/WF) two-stage open-loop flue gas desulfurization (FGD) process were determined for both lime and soda ash absorbents. This two-stage open-loop process is a throwaway system in which the alkali raw material (as a solution or slurry) is sprayed into the flue gas stream, dried by the latent heat in the hot flue gas, and collected as dry particulate matter in a baghouse. The fly ash is also collected in the baghouse as an inherent part of the process. An economic evaluation of a limestone slurry FGD process with an electrostatic precipitator (ESP) for particulate matter removal was included for comparison. The basis was a 500-MW power plant burning 3.5% sulfur, 16% ash coal with 90% SO/sub 2/ removal and 0.1 lb/MBtu particulate matter emission. The economic evaluations were made using both TVA and Electric Power Research Institute (EPRI) economic premises. Cost differences between the two-stage open-loop lime and soda ash versions are largely the result of different waste disposal and raw material costs. Both RI/WF versions are more economical than limestone in most process elements except raw material costs. Cost differences between the TVA- and EPRI-based estimates are the result of different methods of estimating indirect costs, levelizing operating costs, and different raw material costs.

• Research Organization: Tennessee Valley Authority, Muscle Shoals, AL (USA). Div. of Energy Demonstrations and Technology
• OSTI ID: 6263084
• Report Number(s): EPRI-CS-81-9-LD; ON: DE82900158
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AEROSOL WASTES
AIR POLLUTION CONTROL
ASHES
BAGHOUSES
CHALCOGENIDES
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
CONTROL
COST
DESULFURIZATION
DRYING
ECONOMIC ANALYSIS
ECONOMICS
ELECTROSTATIC PRECIPITATORS
EPRI
EQUIPMENT
FLUE GAS
FLY ASH
FOSSIL-FUEL POWER PLANTS
GASEOUS WASTES
LIME-LIMESTONE WET SCRUBBING PROCESSES
NATIONAL ORGANIZATIONS
OPEN-CYCLE SYSTEMS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
REMOVAL
RESIDUES
SCRUBBING
SPRAY DRYING
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TENNESSEE VALLEY AUTHORITY
THERMAL POWER PLANTS
US ORGANIZATIONS
WASTES