Removal of SO/sub 2/ and NO/sub x/ from flue gas by means of a spray dryer/electron beam combination: a feasibility study

Technical Report · Thu Apr 01 00:00:00 EST 1982

OSTI ID:5279405

Helfritch, D J; Feldman, P L; Ray, A B; Morgan, J R; Hildreth, G A

This study examines the feasibility of adding an electron beam between the spray dryer and the fabric filter of dry scrubber flue gas desulfurization (FGD) systems. The beam promises effective removal of nitrogen oxides (NO/sub x/) and sulfur dioxide (SO/sub 2/), even at higher coal-sulfur levels than usually economic for dry scrubbers. The beam excites gas molecules, promoting reactions that convert SO/sub 2/ and NO/sub x/ to acids that then react with calcium compounds and are removed by the filter. Concerns examined here are feasibility and waste disposal. The cost findings are promising for both manufacture and operation. The system uses commercially available components. The relatively low temperatures and high humidity downstream of the spray dryer favor economic beam operation. The beam removes SO/sub 2/, so the dryer can be run for economy, not high removal. The beam's incidental heating effect reduces reheat cost. Safe landfilling of the nitrate-rich waste appears practical, with leachate carrying no more nitrate than natural rain and dustfall. We expect natural pozzolanic reactions between alumina-silica compounds in the fly ash and lime compounds from the spray dryer to form an impermeable concrete-like material within 10 days after landfilling. Dry scrubber with electron beam appears competitive with commercial FGD systems, and we recommend a pilot scale operation.

• Research Organization: Cottrell Environmental Science, Somerville, NJ (USA); High Voltage Engineering Corp., Burlington, MA (USA)
• DOE Contract Number: FC01-81FE15079
• OSTI ID: 5279405
• Report Number(s): DOE/FE/15079-T1; ON: DE82014500; TRN: 82-013182
• Resource Relation: Other Information: Portions of document are illegible
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
01 COAL, LIGNITE, AND PEAT
42 ENGINEERING
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
FLUE GAS
CHEMICAL RADIATION EFFECTS
DESULFURIZATION
FOSSIL-FUEL POWER PLANTS
NITROGEN OXIDES
REMOVAL
SULFUR DIOXIDE
ELECTRON BEAMS
FEASIBILITY STUDIES
FILTERS
SCRUBBERS
BEAMS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
EQUIPMENT
GASEOUS WASTES
LEPTON BEAMS
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PARTICLE BEAMS
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
RADIATION CHEMISTRY
RADIATION EFFECTS
SULFUR COMPOUNDS
SULFUR OXIDES
THERMAL POWER PLANTS
WASTES
200202* - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions
010800 - Coal
Lignite
& Peat- Waste Management
424000 - Engineering- Pollution Control Equipment- (1980-1989)
400600 - Radiation Chemistry