Enhancing the use of coals by gas reburning-sorbent injection

Technical Report · Thu Mar 23 04:00:00 EST 1989

DOI:https://doi.org/10.2172/5382412· OSTI ID:5382412

The objective of this project is to evaluate and demonstrate a cost effective emission control technology for acid rain precursors, oxides of nitrogen (NO{sub x}) and sulfur (SO{sub x}), on three coal fired utility boilers in Illinois. The units selected are representative of pre-NSPS design practices: tangential, wall, and cyclone fired. The specific objectives are to demonstrate reductions of 60 percent in NO{sub x} and 50 percent in SO{sub x} emissions, by a combination of two developed technologies, gas reburning (GR) and sorbent injection (SI). With GR, about 80--85 percent of the coal is fired in the primary combustion zone. The balance of the fuel is added downstream as natural gas to create a slightly fuel rich environment in which NO{sub x} is converted to N{sub 2}. The combustion process is completed by overfire air addition. SO{sub x} emissions are reduced by injecting dry sorbents (usually calcium based) into the upper furnace, at the superheater exit or into the ducting following the air heater. The sorbents trap SO{sub x} as solid sulfates and sulfites. 8 figs., 15 tabs.

• Research Organization: Energy and Environmental Research Corp., Irvine, CA (USA)
• Sponsoring Organization: DOE/FE
• DOE Contract Number: FC22-87PC79796
• OSTI ID: 5382412
• Report Number(s): DOE/PC/79796-T7; ON: DE90002869
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800 -- Coal
Lignite
& Peat-- Waste Management
010900 -- Coal
Lignite
& Peat-- Environmental Aspects
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
AIR POLLUTION CONTROL
BOILERS
CARBONACEOUS MATERIALS
CARBONATE ROCKS
CHALCOGENIDES
COAL
CONTROL
DOCUMENT TYPES
ENERGY SOURCES
FLUE GAS
FLUIDS
FOSSIL FUELS
FOSSIL-FUEL POWER PLANTS
FUEL GAS
FUELS
GAS FUELS
GASEOUS WASTES
GASES
LIMESTONE
MATERIALS
NATURAL GAS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
POLLUTION CONTROL
POWER PLANTS
PROGRESS REPORT
ROCKS
SEDIMENTARY ROCKS
SORPTION
SULFUR COMPOUNDS
SULFUR OXIDES
THERMAL POWER PLANTS
WASTES