Enhancing the use of coals by gas reburning-sorbent injection

Technical Report · Sun Jan 27 04:00:00 EST 1991

OSTI ID:6077779

The objective of this project is to evaluate and demonstrate a cost effective emission control technology for acid rain precursors, oxides of nitrogen (NOx) and sulfur (SOx), on two coal fired utility boilers in Illinois. The units selected are representative of pre-NSPS design practices: tangential and cyclone fired. Work on a third unit, wall fired, has been stopped because of funding limitations. The specific objectives are to demonstrate reductions of 60 percent in NOx and 50 percent in SOx emissions, by a combination of two developed technologies, gas reburning (GR) and sorbent injection (SI). With GR, about 80-85 percent of the coal fuel 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 NOx is converted to N{sub 2}. The combustion process is completed by overfire air addition. SOx emissions are reduced by injecting dry sorbents (usually calcium based) into the upper furnace. The sorbents trap SOx as solid sulfates that are collected in the particulate control device. This project is conducted in three phases at each site: (1) Design and Permitting, (2) Construction and Startup, and (3) Operating, Data Collection, Reporting and Disposition. Current status of the project at the two remaining sites is described.

• Research Organization: Energy and Environmental Research Corp., Irvine, CA (USA)
• Sponsoring Organization: DOE; USDOE, Washington, DC (USA)
• DOE Contract Number: FC22-87PC79796
• OSTI ID: 6077779
• Report Number(s): DOE/PC/79796-T10; ON: DE91009499
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800 -- Coal
Lignite
& Peat-- Waste Management
014000 -- Coal
Lignite
& Peat-- Combustion
20 FOSSIL-FUELED POWER PLANTS
200202* -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
ADSORBENTS
AIR POLLUTION ABATEMENT
ALKALINE EARTH METAL COMPOUNDS
ASHES
BOILERS
CALCIUM COMPOUNDS
CALCIUM SULFATES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COCOMBUSTION
COMBUSTION
COMBUSTION PRODUCTS
CONSTRUCTION
CONTROL
DATA ACQUISITION
DESIGN
DOCUMENT TYPES
ELECTROSTATIC PRECIPITATORS
ELEMENTS
ENERGY SOURCES
EQUIPMENT
FEDERAL REGION V
FLUE GAS
FLUIDS
FOSSIL FUELS
FOSSIL-FUEL POWER PLANTS
FUEL GAS
FUELS
GAS FUELS
GASEOUS WASTES
GASES
HUMIDITY CONTROL
ILLINOIS
MATERIALS
NATURAL GAS
NITROGEN
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
NORTH AMERICA
OPERATION
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE TESTING
POLLUTION ABATEMENT
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
PROGRESS REPORT
REDUCTION
RESIDUES
SORBENT INJECTION PROCESSES
START-UP
SULFATES
SULFIDATION
SULFUR COMPOUNDS
SULFUR OXIDES
TESTING
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES
US CLEAN COAL TECHNOLOGY PROGRAM
USA
WASTES