Wet Flue Gas Desulfurization Systems
Units 1, 2 and 3

Midwestern U.S. Utility

The wet flue gas desulfurization (FGD) system from Babcock & Wilcox (B&W) features a combination of design components to provide a high level of reliability and removal efficiencies. These include B&W’s signature tray tower design that provides excellent 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

Project Summary

  • Engineering, procurement and construction 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
  • Project awarded: April 2004
  • Operational dates: December 2006, May 2007, and October 2007
  • Two additional B&W absorbers scrubbing a fourth boiler at the plant.

B&W Scope

  • Three wet FGD absorbers (1 per boiler)
  • Three limestone milling systems (1 system per boiler)
  • Gypsum dewatering system that includes four horizontal table filters (3 operating, 1 spare)
  • Construction of all B&W supplied equipment through Babcock & Wilcox Construction Co., Inc. (BWCC), a B&W subsidiary


The project met every engineering, fabrication and construction schedule milestone. The commissioned units have met performance guarantees.

Units 1 & 2

Unit 3

New Build

B&W Projects New Build
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.