Chalk Point, Dickerson and Morgantown
Wet Flue Gas Desulfurization Systems

GenOn Energy, Inc.
Houston, Texas

Babcock & Wilcox (B&W) supplied wet flue gas desulfurization (FGD) equipment to provide sulfur dioxide (SO2) removal efficiency of 98% of total gas flow. This design features a combination of components to provide a high level of reliability and removal efficiencies. These include a milling system, absorber towers, trays, spray headers, nozzles, mist eliminators, wash headers and forced oxidation.

Boiler/Plant Information

  • Chalk Point Units 1 & 2: 650 MW total
  • Dickerson Units 1, 2 & 3: 540 MW total
  • Morgantown Units 1 & 2: 1200 MW total
  • Boiler Type: Pulverized coal-fired
  • Design Fuel: Bituminous

Project Summary

  • Engineering and procurement of wet flue gas desulfurization systems for 7 units at 3 plants
  • System to remove 98% of the entering SO2
  • Type: Limestone forced oxidation
  • Project Awarded: 2007
  • Operation Date: 2009

B&W Scope

  • Limestone silos, weigh feeders, and milling system
  • Limestone slurry feed pumps
  • Chalk Point: One absorber module
  • Dickerson: One absorber module
  • Morgantown: Two absorber modules
  • Absorber internals, including trays, spray headers and nozzles
  • Absorber recirculation pumps
  • Mist eliminators and wash headers
  • Absorber inlets and awnings
  • Absorber outlet hoods
  • Emergency quench water header and grid design
  • Forced oxidation systems including oxidation air compressors and injection lances
  • Side entry absorber agitators
  • Absorption Plus (Hg)™ enhanced mercury removal system
  • Absorber bleed pumps
  • Make-up water pumps and mist eliminator wash pump


  • Successful startup and commissioning of wet FGD retrofit projects completed in 4th quarter, 2009
  • Performance testing successfully passed in 2nd quarter, 2010

Chalk Point



Computer Generated Three-dimensional Projection of Absorber Modules at Morgantown.

3D image of Morgantown absorber modules

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