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Reliant Seward Station CFB: Successful Conversion of Waste Coal into Energy

Reliant Seward Station CFB: Successful Conversion of Waste Coal into Energy. Energy from Biomass and Waste Symposium September 27, 2007. Steam Electric Coal Other fossil Biomass Shale Nuclear Combined cycle Simple Cycle Combined cycle Combustion turbine Fuels Cells & Thermo Nuclear

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Reliant Seward Station CFB: Successful Conversion of Waste Coal into Energy

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  1. Reliant Seward Station CFB: Successful Conversion of Waste Coal into Energy Energy from Biomass and Waste SymposiumSeptember 27, 2007

  2. Steam Electric Coal Other fossil Biomass Shale Nuclear Combined cycle Simple Cycle Combined cycle Combustion turbine Fuels Cells & Thermo Nuclear Renewables Wind Solar Hydro Pumped storage Other renewables Geothermal Wave etc Coal Wood, refuse, etc Nuclear Petroleum, distillates, PNG/LNG Fuel Energy/Electric Power

  3. Electric Power Projections (DOE) Total Electricity Generation (Gwe) 2004 - 629.80 2005 - 648.18 2006 - 649.49 2007 - 664.69 2008 - 677.08 2009 - 693.45 2010 - 701.99 2011 - 711.07 2012 - 718.01 2013 - 723.45 • Centralizedvs.DistributedSystems • Valuableinfrastructure Generation by fuel type (2008) Coal 82% Petrolium .6% Natural Gas 6% Nuclear 9% Renewables/other 1.1% ~ 2% growth/annum 2025 (Coal 75% Gas12%)

  4. Seward – Legacy of Coal Mining in Pennsylvania • Waste Coal (“boney”) • Blights the landscape • Contributes to Acid Mine Drainage (AMD) • As a fuel, waste coal is • Higher than some sources: • sulfur • ash • Yet Lower than most sources in energy value • CFB technology can cleanly convert waste coal into energy

  5. Seward - CFB • 521 net MW • Fuel BTU • 5500 BTU • 51% Ash • 2.75% Sulfur • DOE Clean Coal Technology • CFB – Circulating Fluidized Bed Aerial Photo – October 2006

  6. Steam Furnace Ash Collecting Baghouse Cyclone Limestone Fuel Water Ash Air Seward – How • Pollution Control Technology • SNCR – NOx • Limestone/FDA – SO2 • Baghouse • Fuel – Barn and Covered Conveyors • ~ 3.5M tons per year refuse Seward CFB Schematic

  7. Seward – Air Emissions • NOx – Down 74% • CFB low temperatures • Selective Non-Catalytic Reduction (SNCR) • SO2 – Reduced 85% • Limestone injection • FDA – Flash Dry Absorber • Particulate Matter – Down 90% • Fabric filter (baghouse) • Enclosed fuel storage

  8. Seward – Generating Capacity • Generating capacity increases 2-1/2 times • Energy production will increase even more • New plant should run as “baseload” (~ 24/7)

  9. Seward – Future Challenges • Hg • GHG • Holistic – multi-faceted approach to energy • Manufacture • Consumption

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