Integrated NO{sub x} control at New England Power, Salem Harbor Station
- PSI Environmental Instruments Corp., Andover, MA (United States); and others
Selective non-catalytic reduction (SNCR) is a viable technology for reducing NO{sub x} emissions from coal-fired boilers, especially those older units where large capital expenditures for alternative technologies may not be justified. However, NO{sub x} reduction efficiency of the SNCR process is maximized when the proper amount of reagent is injected at the proper temperature and dispersed rapidly enough to avoid ammonia slip. Early NEP experience at Salem Harbor station indicated that NO{sub x} reductions of 60% were achievable with SNCR. However, less NO{sub x} reductions were tolerated to avoid NH{sub 3} slip and subsequent flyash contamination and visible stack plume resulting from excess ammonia. Preliminary tests by PSI Environmental showed that ammonia slip could be monitored in real time using their patented SpectraScan{trademark}-NH{sub 3} instrument, and that furnace exit temperature could be continuously monitored and controlled using GasTemp{trademark} another PSI Environmental product. Based on this information, detailed tests were planned to show integrated control over the SNCR process. A goal of the project was to achieve lower NO{sub x} with less reagent! This paper describes the status of the project.
- Research Organization:
- Electric Power Research Inst. (EPRI), Palo Alto, CA (United States)
- OSTI ID:
- 269414
- Report Number(s):
- EPRI-TR-105978-V4; CONF-9505150-Vol.4; TRN: 96:002976-0003
- 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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