Evaluation of FGD (flue gas desulfurization) dry-injection sorbents and additives. Volume 2. Pilot plant evaluation of high-reactivity sorbents. Final report, January 1986-December 1987

Technical Report · Mon May 01 04:00:00 EDT 1989

OSTI ID:5500249

Chang, J C.S.; Jorgensen, C

The report describes a mini-pilot test program to investigate potential new sorbents and processes for dry SO{sub 2} removal. Initial tests showed that the 85 cu m/h pilot plant could be used successfully to evaluate both spray dryer and dry injection processes using traditional calcium- or sodium-based sorbents. The major part of the test program investigated the use of fly ash or diatomaceous earth for enhancement of lime with respect to SO{sub 2} removal in a dry injection process. This part of the test program verified the silica enhancement of Ca(OH){sub 2} which previously had been extensively studied on a bench-scale reactor. The pilot program showed that 50-90% SO{sub 2} removal can be achieved for a stoichiometric ratio of 1 to 2 by dry injection of the silica enhanced lime when using a duct + baghouse configuration, or when using a duct + cyclone configuration including recycle. The sorbent preparation procedure was developed throughout the test program, and an important result was that the silica enhanced lime can be prepared as a semidry sorbent containing 20-30% moisture, suitable for duct injection. Evaporative cooling of the flue gas is allowed as a result of the sorbent injection, thereby lowering the approach to saturation and increasing the SO{sub 2} removal.

• Research Organization: Acurex Corp., Research Triangle Park, NC (USA). Environmental Systems Div.
• OSTI ID: 5500249
• Report Number(s): PB-89-214134/XAB
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
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& Peat-- Waste Management
42 ENGINEERING
424000 -- Engineering-- Pollution Control Equipment-- (1980-1989)
ADDITIVES
ADSORBENTS
AEROSOL WASTES
AIR POLLUTION
ALKALINE EARTH METAL COMPOUNDS
ASHES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CARBONATE ROCKS
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
DESULFURIZATION
DIATOMACEOUS EARTH
DOCUMENT TYPES
DRYING
EQUIPMENT
FLUE GAS
FLY ASH
FUNCTIONAL MODELS
GASEOUS WASTES
LIMESTONE
OXIDES
OXYGEN COMPOUNDS
PILOT PLANTS
POLLUTION
POLLUTION CONTROL EQUIPMENT
PROGRESS REPORT
RESIDUES
ROCKS
SCRUBBERS
SEDIMENTARY ROCKS
SILICON COMPOUNDS
SILICON OXIDES
SPRAY DRYING
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTES