Roxboro Station Units 1 - 4
Wet Flue Gas Desulfurization Systems

Progress Energy
Roxboro, North Carolina

Babcock & Wilcox (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 superior gas to liquid contact and uniform flow distribution through the absorber spray zones; its patented inlet awning, interspatial headers to reduce absorber height, pump power requirements, and internal support costs; forced oxidation system; and advanced mist eliminators.

Boiler/Plant Information

  • 3 x 700 MW (Units 2, 3 and 4),
  • 1 x 400 MW (Unit 1)
  • Boiler type: Pulverized coal fired
  • Design fuel: Bituminous
  • Additional environmental equipment: Electrostatic precipitator, selective catalytic reduction system, and waste water treatment system

Project Summary

  • Engineering, procurement and commissioning of a wet flue gas desulfurization system
  • System designed to remove 97% of the entering SO2 without organic acid addition
  • Type: Limestone forced oxidation with gypsum byproduct
  • Commercial operation:
    - April 2007 (Unit 2),
    - December 2007 (Unit 4),
    - May 2008 (Unit 3),
    - December 2008 (Unit 1)

B&W Scope

  • Four wet FGD absorbers – functional design by B&W, supply by Stebbins
  • Three limestone ball mill systems (2 operating, 1 spare)
  • Four vacuum filter systems (3 operating, 1 spare)

Results

The project met engineering, fabrication and delivery objectives. 

New Build

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We consistently demonstrate the ability to successfully execute innovative solutions for our customers, from new equipment to large, complex full-scope engineering and construction projects.

Upgrades / Retrofits

Upgrades and Retrofits by B&W
Modifying, improving and maintaining existing equipment are vital considerations for the long-term viability and profitability of all operations.

Parts / Services

Babcock & Wilcox Parts and Service Support
An extensive network of worldwide regional service centers, field service engineers and technical support personnel are available to provide the customized service and aftermarket solutions for your requirements.