Enhancing the use of coals by gas reburning-sorbent injection. Quarterly report no. 6, September 1, 1988--November 30, 1988

Technical Report · Thu Dec 22 04:00:00 EST 1988

DOI:https://doi.org/10.2172/10158864· OSTI ID:10158864

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 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 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, which are collected in the particulate control device.

• Research Organization: Energy and Environmental Research Corp., Irvine, CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FC22-87PC79796
• OSTI ID: 10158864
• Report Number(s): DOE/PC/79796--T21; ON: DE92015744
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800
014000
20 FOSSIL-FUELED POWER PLANTS
200202
54 ENVIRONMENTAL SCIENCES
540120
AIR POLLUTION CONTROL
BOILERS
CALCIUM COMPOUNDS
CHEMICALS MONITORING AND TRANSPORT
COMBUSTION
DENITRIFICATION
DESULFURIZATION
FLUE GAS
NATURAL GAS
NITROGEN OXIDES
NOXIOUS GAS AND PARTICULATE EMISSIONS
PROGRESS REPORT
SORBENT INJECTION PROCESSES
SORPTIVE PROPERTIES
STAGED COMBUSTION
SULFUR DIOXIDE
WASTE MANAGEMENT