PPT《Mirant Mid-Atlantic》

Mirant Mid-Atlantic MWAQC Technical Advisory Committee BriefingJanuary 21,

2005 Discussion Topics NOx SettlementProgress Report on Current ProjectsView on Multipollutant Legislation NOx Settlement Key Elementsof Mid-Atlantic Global NOx Settlement Control Technology to be InstalledPotomac River 3,4,5 C Low NOx Burners in 2004, SOFA in 2005Morgantown 1,2 C SCRs in 2007, 2008Declining NOx Tonnage Caps from

2004 through 2010Ozone Season Caps C for Potomac River and SystemAnnual Caps C for SystemEmissions Rate LimitsOzone Season System limit of 0.

150 lb/MBtu starting in 2008Morgantown SCRs limit of 0.100 year-round, once installedPenalty and ProjectsCash payment of $500,000Supplemental Projects totaling $1.0 M to reduce dust and particulate matter emissions at the site Terms of SettlementNOx Caps & Trading Provisions Environmental Projects PROJECT Est. PM ReductionAsh Silo Vent Secondary Filters

30 tonsTruck Wash Facility13.7 tonsCoal Pile Fencing 2.8 tonsCoal Pile Binding Agent

800 lbsAsh Unloader Replacement

200 lbsTruck Loading Dust Suppression

200 lbsRailcar Unloading Dust Suppression

200 lbsSettled Dust StudyContribution to Clean Air Partners TOTAL Cost = $1,000,000 Annual System NOx Reductions Summer NOx Reductions Benefits of Settlement Resolves Potomac River NOVAchieves 0.15 lb/MBtu system NOx average by 2008Year-round SCR operation will reduce PM2.5 emissionsEmission caps ensure environmental benefit while allowing flexibility over methods to reach compliance targetsWhen paired with future SO2 controls, significant Hg and additional PM2.5 reductions Progress on NOx Projects Current NOx Projects Chalk Point Unit #2 SACRMorgantown #1 SCRPotomac River #3-5 SOFA Chalk Point #2 SACR SACR = Selective Auto-Catalytic ReductionInjects ammonia + natural gas in convection pass of boilerGas acts as catalyst for NOx reduction and consumes excess ammoniaExpecting ~50% reduction in NOxIn final engineering / procurement phaseReagent switch from anhydrous ammonia to ureaSystem in service late

2005 / early

2006 Morgantown #1 SCR First SCR went out for bids in October 2004Bid evaluation process underwayCurrently on schedule for May

2007 in-service dateUrea selected as reagent Potomac River #3-5 SOFA Dampers, drives, ductwork being procured / fabricatedAll three units to be retrofitted this springLow NOx burners installed on Units 3-5 last spring - 15% reductionLow NOx burners installed on Unit 1-2 last fall - 5-10% reduction Potomac River SOFA Burner Corner SOFA Port SOFA Ductwork Multipollutant Legislation Multipollutant Legislation Cap & Trade approach vs. Percent ReductionRealistic Timeline to ImplementTechnical: Time to engineer, procure, and installFinancial: Cost of NOx, SO2, & Hg controls simultaneouslyAlignment with Federal programs MercurySubstantial Co-benefits from NOx & SO2 controlsNo large scale / long term demonstrations yetContinuous Hg monitors not commercially availableCO2Few options for significant reduction on coal-fired unitsFuel switch / repowering to gas costly to customer and generator Questions