Chalk Point, Dickerson and Morgantown Case Study

Chalk Point, Dickerson and Morgantown Wet Flue Gas Desulfurization Systems

GenOn Energy, Inc.

Houston, Texas

Overview

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

Dickerson

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

Morgantown

Results

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

Download The PDF

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