Duquesne Light Company`s modifications for nitric oxide RACT compliance on a 200 MW face fired pulverized coal unit
- Energy Systems Associates, Pittsburgh, PA (United States)
- Duquesne Light Co., Pittsburgh, PA (United States)
This paper discusses the results of a research test program conducted on Duquesne Light Company`s Elrama Unit 4. The program was designed to determine the viability of achieving compliance with the recently enacted PA DER Reasonably Available Control Technology (RACT) regulations. These regulations stipulate presumptive RACT requirements for wall fired boilers which include the installation and operation of low NO{sub x} burners with separated overfire air. Duquesne Light Company contracted Energy Systems Associates (ESA) to aide in the design and testing of a novel low NO{sub x} burner design and separated overfire air system. A three-dimensional computational furnace model was developed by ESA of the Elrama Unit 4 furnace, and a two-dimensional fluid dynamics model was developed of the coal burner. By modifying the coal burners, it has been possible to reduce the nitric oxide emissions by 30% on Unit 4, with minimal impact of the unburned carbon in the ash. The burner modifications create fuel rich streams which are surrounded by air rich zones in the primary flame region, thus staging combustion at the burner. Additional nitric oxide reductions are realized when the combustion is further staged by use of the separated overfire air system.
- OSTI ID:
- 427830
- Report Number(s):
- CONF-961006-; ISBN 0-7918-1795-4; TRN: IM9708%%157
- Resource Relation:
- Conference: 1996 international joint power generation conference, Houston, TX (United States), 13-17 Oct 1996; Other Information: PBD: 1996; Related Information: Is Part Of Proceedings of the 1996 international joint power generation conference -- Volume 1: Environmental control/fuels and combustion technologies. EC-Volume 4; FACT-Volume 21; Smouse, S.M. [ed.] [Dept. of Energy, Pittsburgh, PA (United States). Pittsburgh Energy Technology Center]; Gupta, A. [ed.] [Univ. of Maryland, College Park, MD (United States)]; PB: 516 p.
- Country of Publication:
- United States
- Language:
- English
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