Successful NOx reduction and conversion to powder river basin fuel on wall fired boilers

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:560568

Woldehanna, S; Steitz, T; Exner, B ^[1]; Skinner, B; Smoeyink, J ^[2]

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1. Foster Wheeler Energy Corp., Clinton, NJ (United States)
2. Northern Indiana Public Service Co., Hammond, IN (United States)

This paper presents the project goals and evaluations along with the operating results of the Low NOx/Powder River Basin (PRB) fuel conversion at Northern Indiana Public Service Company`s (NIPSCO), Schahfer unit 15,500 MW boiler. In adherence to the New Source Performance Standards (NSPS), the original firing equipment produced NOx emissions slightly below 0.70 lb/MMBtu burning Bituminous coal with overfire air. The overall objectives were to burn cost effective PRB coal at NOx emissions below 0.45 lb/MMBtu while maximizing boiler performance. Working closely with NIPSCO, Foster Wheeler Energy Corporation (FWEC) designed and supplied the necessary Low NOx burners and pressure parts modification to enable PRB coal firing on this unit. Post-retrofit NOx emissions, without overfire air, are consistently below 0.35 lb/MMBtu with repeatable loss of ignition performance below 1%. The pressure part modifications met NIPSCO`s boiler performance requirements, with successful unit operation above 90% MCR. Experiences with PRB coal at other Foster Wheeler units are also briefly described.

• OSTI ID: 560568
• Report Number(s): CONF-961232--
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
AIR POLLUTION CONTROL
BOILERS
COAL
FOSSIL-FUEL POWER PLANTS
NITROGEN OXIDES
RETROFITTING