Dry flue gas desulfurization process for various coals

Conference · Tue Jan 01 04:00:00 EST 1985 · Proc., Annu. Meet., Air Pollut. Control Assoc.; (United States)

OSTI ID:5849730

Widico, M J; Dhargalkar, P H

Flue gas desulfurization (FGD) processes have been widely used since the early 1970's for control of sulfur dioxide emissions from coal-fired power plants. First generation FGD systems employ ''wet processes'' whereby the flue gas is contacted with a solution or slurry of an alkali reagent. Most of these installations use either lime or limestone. Calcium-based wet systems have, in general, satisfied SO/sub 2/ removal requirements; however, reliability of the early systems was affected by some operational problems. Additionally, sludge dewatering and disposal equipment results in overall system complexity. A dry FGD process which minimizes these problems was developed in late 1970's. It incorporates a spray drying concept for removal of SO/sub 2/ by reaction with lime slurry or soda ash solution. The spray dryer absorber is followed by an electrostatic precipitator or a fabric filter where particulates are collected. The waste product, which is a mixture of FGD reaction products, unreacted reagent and fly ash, is dry thus eliminating the need for dewatering equipment.

• Research Organization: Research-Cottrell, Inc., Somerville, NJ
• OSTI ID: 5849730
• Report Number(s): CONF-850612-
• Conference Information: Journal Name: Proc., Annu. Meet., Air Pollut. Control Assoc.; (United States) Journal Volume: 4
• 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
AEROSOL WASTES
AIR POLLUTION ABATEMENT
ALKALI METAL COMPOUNDS
ASHES
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATE ROCKS
CARBONATES
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COMBUSTION
COMPARATIVE EVALUATIONS
DESULFURIZATION
DISPERSIONS
DRY SCRUBBERS
DRYING
ELECTROSTATIC PRECIPITATORS
ENERGY SOURCES
EQUIPMENT
FABRIC FILTERS
FILTERS
FLUE GAS
FLY ASH
FOSSIL FUELS
FOSSIL-FUEL POWER PLANTS
FUELS
GASEOUS WASTES
LIME-LIMESTONE WET SCRUBBING PROCESSES
LIMESTONE
MATERIALS
MIXTURES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
POLLUTION ABATEMENT
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
REAGENTS
RELIABILITY
REMOVAL
RESIDUES
ROCKS
SCRUBBERS
SCRUBBING
SEDIMENTARY ROCKS
SLURRIES
SODIUM CARBONATES
SODIUM COMPOUNDS
SOLUTIONS
SPRAY DRYING
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SUSPENSIONS
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES
WASTES
WATER REMOVAL