Technical review of dry FGD systems and economic evaluation of spray dryer FGD systems. Final report May 79-Nov 80

Technical Report · Sun Feb 01 04:00:00 EST 1981

OSTI ID:5478107

Burnett, T A; Anderson, K D

The report gives results of an extensive study of dry flue gas desulfurization (FGD) systems, involving dry injection of absorbents or spray drying. (The study was undertaken because they appear to have both process and economic advantages over wet FGD.) Design concepts (e.g., type of absorbent and atomizer, approach to flue gas saturation temperature, and particulate collection method) remain to be demonstrated at full scale. Most vendors prefer a lime slurry system with rotary atomizers and fabric filter particulate collection, while all systems now under contract to utilities apply to low-sulfur coal. SO/sub 2/ removal efficiencies sufficient for high-sulfur coal applications at stable operating conditions and economically feasible absorbent utilization rates have not yet been demonstrated. In conceptual design cost comparisons based on a new 500-MW utility power generation unit, a lime spray dryer/fabric filter combination had lower capital investments and annual revenue requirements for 0.7% sulfur western coal and both 0.7 and 3.5% sulfur eastern coal than a wet limestone scrubbing process. With lignite fuel, similar cost advantages were evident for dry (relative to wet) FGD. The capital investment advantage of dry over wet FGD increased with increasing coal sulfur content.

• Research Organization: Tennessee Valley Authority, Muscle Shoals, AL (USA). Div. of Energy Demonstrations and Technology
• OSTI ID: 5478107
• Report Number(s): PB-81-206476
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800 -- Coal
Lignite
& Peat-- Waste Management
20 FOSSIL-FUELED POWER PLANTS
200202* -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ABSORPTION
AIR POLLUTION CONTROL
CAPITALIZED COST
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION PRODUCTS
CONTROL
COST
DESIGN
DESULFURIZATION
DRYING
ECONOMIC ANALYSIS
ECONOMICS
EQUIPMENT
FILTRATION
FLUE GAS
FOSSIL-FUEL POWER PLANTS
GASEOUS WASTES
INDUSTRIAL WASTES
OXIDES
OXYGEN COMPOUNDS
PARTICLES
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
SCRUBBERS
SEPARATION PROCESSES
SPRAY DRYING
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
THERMAL POWER PLANTS
WASTES