Transcript WIR LOW NOx
Environmental Leadership The Pursuit of Cleaner Air A Presentation to the DENR/DAQ Mercury and CO2 Workshop Ben White April 20, 2004 1 Agenda • Overview of Progress Energy • Progress Energy’s Innovative Solutions for NOx Reduction • Progress Energy’s activities pursuant to the Clean Smokestacks Act 2 Progress Energy at a Glance • Super-regional energy company with over 23,000 megawatts of generation capacity • Among the nation’s top ten utilities when ranked by generation capacity • Employees: approximately 16,000 • Customers: 2.8 million electric customers in North and South Carolina and Florida 3 Progress Energy at a Glance 38 plant sites 2002 Generation Capability (MWs) 4 Air Pollutant Formation NOX VOC SO2 NOX O3 SO4 NO3 OC VOC NOX VOC NOX PM 2.5 VOC NH3 5 2000 Triangle Area NOx Emissions Biogenic 1% Area 1% Nonroad 10% Mobile 38% Point 50% 2000 total NOx, Triangle area: 474.25 tons per day Average summer weekday 2007 Triangle Area NOx Emissions (Projected) Biogenic 1% Mobile 55% Area 3% Nonroad 21% Point 20% 2007 total NOx, Triangle area: 216.14 tons per day Average summer weekday 6 Evolution of PGN NOx Control Technology Installations • • • • • • • 1993 – 1999 1997 - 1999 1999 - 2000 1999 - 2000 2000 - 2001 1999 - 2001 2002 - 2006 Traditional approach (LNB/OFA) WIR installations 1st ROFA installation AEFLGR installation 1st ROFA/Rotamix installation 1st SCR installation 5 additional SCR’s in service 7 Progress Energy NOx Reduction Leadership • Searched worldwide for emissions reduction technologies – Sweden – ROFA technology. Reduced NOx emissions by more than 50% at Cape Fear Plant. – Eastern Europe – WIR technology. Reduced NOx emissions by 35 to 40 percent at Weatherspoon and Lee plants. – First utility in the world to apply these controls • Selective Catalytic Reduction (SCR) – First SCR in North Carolina - Roxboro Unit 4 – Three SCR’s in-service in Person County on May 1, 2003 - one year ahead of compliance requirements 8 NC Annual and Ozone Season NOX Emissions 140,000 Actual Projected 120,000 100,000 77% reduction by 2007 80,000 60,000 40,000 20,000 0 1995 1996 1997 1998 1999 2000 2001 NC Annual 2002 2003 2004 2005 2006 NC Ozone Season 9 Clean Smokestacks Act On June 20, 2002, North Carolina Senate Bill 1078, also known as the “Clean Smokestacks Act,” was signed into effect. This law, which was a landmark, cooperative effort between utilities, regulators, and environmental groups, requires significant reductions in the emissions of nitrogen oxides (NOx) and sulfur dioxide (SO2) from utility owned coal-fired power plants located in North Carolina. This act is serving as a model that other states are following. 10 Progress Energy Emissions Reduction Leadership • Clean Smokestacks – Broad coalition (DENR, Governor, General Assembly, Advocates, Utilities) – Technologies will be installed by 2013 – First scrubber operational in 2005 at Asheville plant – Rates frozen until 2007 – Investing more than $800 million to comply with Act’s requirements – Investment in addition to the $370 million the company has spent to reduce NOx emissions in the ozone season – Technologies projected to reduce SO2 emissions by 74 percent and NOx emissions by 56 percent from 2001 levels – EPA Clean Air Excellence Award to state and its partners 11 Progress Energy’s Clean Smokestacks Act Plan Supplement April 1, 2004 • Progress Energy owns and operates 18 coal-fired boilers at seven plants in North Carolina, with over 5000 MWe generating capacity. • On June 20, 2002 Governor Easley signed into law SB1078 which caps emissions of nitrogen oxides (NOx) and sulfur dioxide (SO2) from utility owned coal-fired power plants located in North Carolina. Progress Energy emissions caps for NC are: Tonnage Caps* NOx (2007) 25,000 SO2 (2009) 100,000 (2013) 50,000 *Cumulative for all Progress Energy NC units 12 Locations of Progress Energy’s Coal-Fired Power Plants in North Carolina 13 Progress Energy NOX Emissions (Annual Emissions in Tons) 140,000 Actual SIP Call 120,000 100,000 80,000 60,000 40,000 20,000 Clean Smokestacks Actual Reductions SIP Call 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 0 Clean Smokestacks 14 How Does an SO2 Scrubber Work? A slurry of finely ground limestone (CaC03) is sprayed into a reaction tower, which has flue-gas flowing counter-current to the spray. The SO2 in the gas reacts with the limestone, removing 95% of the S02 and making CaS04 (gypsum). 15 FGD Overview B&W Absorber Module 16 Progress Energy SO2 Emissions (Annual Emissions in Tons) 250,000 Actual 200,000 150,000 Clean Smokestacks 100,000 50,000 19 97 19 98 19 99 20 00 20 01 20 02 20 03 20 04 20 05 20 06 20 07 20 08 20 09 20 10 20 11 20 12 20 13 20 14 20 15 20 16 20 17 20 18 0 Actual Emissions Clean Smokestacks 17