Commercial application of urea SNCR for NO{sub x} RACT compliance on a 112 MWe pulverized coal boiler
Montaup Electric Company, a subsidiary of Eastern Utilities Associates, operates a tangentially-fired pulverized coal boiler at its Somerset, MA generating station. NO{sub x} emissions from the 112 MWe Montaup boiler No. 8 must be reduced from their uncontrolled levels in order to comply with the Reasonably Available Control Technology (RACT) requirements promulgated by the Commonwealth of Massachusetts. According to RACT, NO{sub x} emissions from the unit must not exceed 0.38 lb/MMBTU when firing coal or 0.25 lb/MMBTU when firing oil. For reduction of NO{sub x} emissions from Montaup boiler No. 8, combustion controls and flue gas treatment were considered. Montaup Electric chose Selective Non-Catalytic Reduction (SNCR) technology as its primary means of reducing NO{sub x} from baseline levels to the levels required for RACT compliance. The SNCR technology operates by injection of controlled amounts of aqueous urea into the furnace to reduce the NO{sub x} to nitrogen, water and carbon dioxide. Total project scope included design engineering, equipment supply, installation, and system startup. Optimization and startup of the system were completed in early March. Startup testing demonstrated that the system can achieve compliance levels across the load range 35% to 100% MCR while maintaining ammonia slip at about 10 ppm or less. This paper will describe the system provided to Montaup Electric and will discuss the results of startup and optimization testing.
- Research Organization:
- Electric Power Research Inst. (EPRI), Palo Alto, CA (United States)
- OSTI ID:
- 269415
- Report Number(s):
- EPRI-TR-105978-V4; CONF-9505150-Vol.4; TRN: 96:002976-0004
- Resource Relation:
- Conference: EPRI/EPA joint symposium on stationary combustion NO/sub x/ control, Kansas City, MO (United States), 16-19 May 1995; Other Information: PBD: Jan 1996; Related Information: Is Part Of Proceedings: EPRI/EPA 1995 joint symposium on stationary combustion NO{sub x} control: Volume 4, Friday, May 19, 1995, Sessions 8A and 8B; PB: 193 p.
- Country of Publication:
- United States
- Language:
- English
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