A Fixed Structure Approach to Mercury Control for Coal Fired Power Plants

Transcription

1 A Fixed Structure Approach to Mercury Control for Coal Fired Power Plants John Darrow Paul Barilla W.L. Gore & Associates, Inc. McIlvaine Hot Topic Hour April 18, 2013

2 Traditional Strategies for Mercury Control Sorbent Injection Fly ash contamination Loss of sales/disposal costs Additional PM burden on collector Sensitivity (SO 3, Hg species) Mercury oxidation chemistry capture Hg in scrubber liquor Additives (i.e., Br) can cause corrosion Waste water treatment concerns (i.e., Br, Se) Potential Hg Re emissions from scrubber

3 GORE Mercury Control System Fixed Sorbent Mercury Control No Injection of Sorbents or Chemicals Simple Passive Operation Robust Mercury Control

4 Material Innovation by Gore Sorbent Polymer Composite (SPC) Novel fluoropolymer material Efficiently captures mercury High capacity for mercury storage (long lifetime) Does not require regeneration SO 3 does not inhibit Hg capture Unique physical chemical nature SO 2 and H 2 O are converted into sulfuric acid (catalytic function) Liquid sulfuric acid is expelled from the highly hydrophobic structure SO 2 removal co benefit

5 Discrete Modules h = Efficiency Over 90% Mercury Removal Possible

6 Low Pressure Drop Hg bound to SPC Low pressure drop

7 Typical Layout

8 Pressure Drop Pressure Drop (inwg) /8th 1/3rd inch H 2 O per module Air Flow (fps)

9 Scalable Mercury Control Mercury Removal (%) Coal Creek Pilot after 220 days Gas Velocity 5 ft/s 10 ft/s 15 ft/s Module Stack Height

10 Modules in Operation (Coal Creek Pilot) Top View of Module Removed for inspection Leading Edge of Modules in operation after ~200 days

11 Variable Mercury Emissions No Adjustments Hg Concentration µg/nm3 120 Hg Inlet Concentration Hg Outlet Concentration Time (Hours)

12 Simple Solution for Scrubber Re emissions Hg Emissions (lb/tbtu) 8 GORE Mercury Control MATS System Limit 4 0

13 Installation after Dry Scrubber Dry Scrubber Baghouse Mercury Control Modules

14 Installation without Scrubber Baghouse or ESP Evaporative Cooler Mercury Control Modules

15 500 MW e Operating Cost Comparison SDI Lime Electricity GMCS Bromine license fee CaBr2 Activated Carbon Fly Ash Sales / Disposal 5 lb/macf 2 lb/macf 1 lb/macf 300 ppm 25 ppm 5:1 100 ppm

16 GORE Mercury Control System No Carbon Injection No Fly Ash Contamination Low Impact No Additional PM No Bromine Injection MATS Compliance No Corrosion Concerns No Wastewater Treatment System Impact

17 GORE Mercury Control System No Moving Parts No Adjustments In Use No Regeneration Required Low Impact MATS Compliance Low Maintenance Cost Effective

18 GORE Mercury Control System Insensitive to SO 3 Insensitive to Hg Species (Hg 0, Hg 2+ ) Fuel Flexibility Low Impact MATS Compliance Low Maintenance Re emissions Barrier Robust

19 GORE Mercury Control System Long Module Lifetime Low Operating Cost Zero Footprint Low Impact MATS Compliance Low Maintenance SO 2 Removal Co benefit Cost Effective Robust

20 GORE Mercury Control System Tailpipe solution Commitment to Fitnessfor Use Mercury Removal Guaranteed Low Impact MATS Compliance Low Maintenance Cost Effective Robust

21 Planned Activities Next 12 months Full scale Installation (~100MW) Full scale Installation (~200 MW) Full scale Installation (~200 MW) Full scale Installation (~400 MW) Commercial Full scale Installation (~300MW) PILOT TEST #5 PILOT TEST #6 PILOT TEST #9 PILOT TEST #8 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN Low Volume Module Production High Volume Module Production

22 Contact Information W. L. Gore and Associates Jeff Kolde, Product Specialist: John Knotts, Sales and Marketing: John Darrow, Applications Engineer: Paul J. Barilla, Applications Engineer: URS Corporation Jonas Klingspor, Business Development: Steve Wacker, Sales and Marketing: