Industrial boiler retrofit for NO{sub x} control: Combined selective noncatalytic reduction and selective catalytic reduction
- Acurex Environmental Corp., Research Triangle Park, NC (United States)
- EPA, Research Triangle Park, NC (United States)
A 590 kW (2 MMBtu/hr), oil-fired, three-pass, fire-tube package boiler was retrofit with a combined selective noncatalytic reduction (SNCR) and selective catalytic reduction (SCR) system and demonstrated 85% nitrogen oxide (NO{sub x}) reduction with less than 6 ppm ammonia slip. A urea-based SNCR solution was injected in the first pass, reducing NO{sub x} and providing ammonia reagent for the SCR. A catalyst housing was designed to fit between the second and third passes, where the access doors of the boiler normally attach. The SCR catalyst volume of 0.04 m{sup 3} (1.5 ft{sup 3}) provided a space velocity of 10,000 hr{sup -1} at a pressure drop of less than 1.5 cm (0.5 in) of water. Numerous runs demonstrated system repeatability and ease of operation.
- Research Organization:
- Electric Power Research Inst. (EPRI), Palo Alto, CA (United States)
- OSTI ID:
- 374535
- Report Number(s):
- EPRI-TR-105978-V3; CONF-9505150-Vol.3; TRN: 96:004683-0026
- 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 3, Thursday, May 18, 1995, Sessions 6A, 7A, 7B; PB: 476 p.
- Country of Publication:
- United States
- Language:
- English
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