Industry publication, December 2001

NYC 9/11 Public Portal Document

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cessfully used on gas-fired used in combination with overfire air, plants in the U.S. and coal- have been extensively retrofitted into util- t fired plants overseas, its appli- ity boilers over the past 5 to 10 years, as cation to large-scale, high- mandated by the Clean Air Act Amend­ SS pressure boilers firing U.S. ments of 1990. coals presents technical chal- lenges. Columbus-based Ohio FIRING UP ' *1 Power Co.’s 2,600-Mw Gavin The number of announced new coal- B Station, for instance, found based construction projects in the U.S. I ■ itself in the national news last vaulted from one to 10 in the first few _ 1 Mil summer when it unexpectedly months of 2001, and now stands at some k A In IB thick blue plumes of two dozen. A harbinger of these projects I F ’ r* Ka m il SOSi bS Bsfl following start-

developmental and commer- of was the Hawthorn Unit 5 project, com- pleted last year by the team of Kansas City Power & Light Co., B&W and Bums & a cial design activity is seeking McDonnell, Kansas City. Firing PRB coal to make the Babcock Borsig with reduced sulfur emissions, the new Power-supplied SCR system— unit also is equipped with SCR, dry FGD, as well as other new SCRs start- the most advanced LNBs commercially ing up at coal-fired plants— available and the largest pulsejet fabric work more reliably and ef- filter system in the U.S. fectively. Many coal-fired plants constructed in Supplementing the post- the next few years will feature circulating combustion technologies of fluidized-bed (CFB) technology. The low SflW ESP, FGD, and SCR, low-NOx operating temperature of CFB boilers '^1 burner (IJ<B) technology min- means that air emissions are inherently imizes emissions from coal- low. What’s more, CFB boilers are able to Sill fired plants during combus- cleanly burn a wide variety of fuels, so a STRETCHING Gasification uses low-cost feedstock, tion. LNB designs, frequently CFB plant is able to switch fuels quickly

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