Control of NO/sub x/ and SO/sub 2/ emissions by gas reburning-sorbent injection technology

Conference · Thu Jan 01 04:00:00 EST 1987

OSTI ID:6472284

Bartok, W; Folsom, B A

Emissions of oxides of sulfur and nitrogen are thought to be responsible for acid rain deposition. A large number of existing pre-NSPS electric utility boilers fired with Midwestern and Eastern coals would be affected if acid rain control legislation is promulgated. To allow such boilers to meet potential emissions regulations with fuel flexibility and good operability, cost effective retrofit emission control technology is required. Gas Reburning-Sorbent Injection (GR-SI), a combination control technology that could be retrofitted to coal fired utility boilers, could reduce NO/sub x/ and SO/sub 2/ emissions by 60% and 50%, respectively. A field test project has been initiated as part of the DOE's Clean Coal Technology program to demonstrate GR-SI on three pre-NSPS coal fired utility boilers in Illinois. The Gas Research Institute and the State of Illinois are the other participants in this project. The boilers selected are representative of pre-NSPS design types: one each of tangentially, wall, and cyclone fired units will be tested. Gas reburning consists of the staged introduction of fuel, with coal fired in the main heat release zone, and 15-20% of the heat input added as natural gas in the downstream reburn zone. This is followed by the burn-out zone where a dry, calcium based sorbent can also be injected for SO/sub 2/ pick-up. Alternatively, the sorbent may be injected further downstream in the boiler, or into the flue gas duct between the air heater and the precipitator. Following baseline and optimization testing, the GR-SI technology will be demonstrated in one-year field tests at each host site for a total project duration of fifty-four months.

• OSTI ID: 6472284
• Report Number(s): CONF-871113-
• 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
ADSORBENTS
ADSORPTION
AIR POLLUTION CONTROL
ALKALINE EARTH METAL COMPOUNDS
BOILERS
CALCIUM COMPOUNDS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COMBUSTION
CONTROL
DENITRIFICATION
DESORPTION
DESULFURIZATION
EMISSION
ENERGY SOURCES
FLUE GAS
FOSSIL FUELS
FUELS
GASEOUS WASTES
MATERIALS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
SORPTION
SORPTIVE PROPERTIES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES
WASTES