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From The Leader in Clean Power Production Technologies

Asheville Station Units 1 and 2 Wet Flue Gas Desulfurization Systems

Asheville Station Units 1 2 Wet FGD Case Study Babcock Wilcox

Wet Flue Gas Desulfurization Systems – Progress Energy

Babcock & Wilcox’s (B&W) wet flue gas desulfurization (FGD) systems feature a combination of design components to provide a high level of reliability and removal efficiencies. These include B&W’s signature tray tower design to provide excellent gas to liquid contact and uniform flow distribution through the absorber spray zones, its patented inlet awning, forced oxidation system, and advanced mist eliminators.

Download Case Study (PDF)


Boiler/Plant Information

  • 2 x 200 MW
  • Boiler type: Pulverized coal fired
  • Design fuel: Bituminous
  • Additional environmental equipment: Electrostatic precipitator and selective catalytic reduction system

Project Summary

  • Engineering, procurement and commissioning of a wet FGD system
  • System designed to remove 97% of the entering SO2 without organic acid addition
  • Type: Limestone forced oxidation with gypsum byproduct
  • Commercial operation: November 2005 and May 2006

B&W Scope

  • Two (2) wet FGD absorbers – functional design, process equipment and tower internals by B&W, tower structure by Stebbins
  • Two (2) limestone milling systems (1 operating, 1 spare)
  • Four (4) gypsum centrifuges
    (3 operating, 1 spare)


The project met engineering, fabrication and delivery objectives. The commissioned units met or exceeded performance guarantees. The project also earned the Best Coal-Fired Project Honorable Mention award at the 2006 POWER-GEN International Conference and Exhibition.


Asheville Station Units 1 and 2 Wet FGD Case Study