FGD and DeNOx
NEWSLETTER       

January 2010
No. 381

200-MW CWLP Dallman Completed on Budget and Ahead of Schedule

Kiewit-Black & Veatch Springfield Power Partners (KBV) officially handed over control of the $515 million 200-MW subcritical Dallman 4 power plant to CWLP, Springfield, IL. The plant was completed on budget and roughly five months ahead of its April 2010 contractual deadline.

CWLP’s general manager, Todd Renfrow, noted that the community is “very proud to soon be the owner of one of the cleanest and most advanced coal-fired power plants in the nation. The execution of the project with little cost overrun and being so far ahead of schedule has raised the bar in power plant design and construction.”

Doug Brown, CWLP’s major projects development director and the Dallman Unit 4 project manager, explained that the project’s primary goals included environmental protection and energy efficiency:  “A major part of this goal is to protect our ratepayers from the highly-volatile market-based rates.”

KBV purchased a Foster Wheeler boiler, a Toshiba steam turbine generator and Wheelabrator Air Pollution Control Inc. air quality control system equipment. GEA Power Cooling supplied the cooling tower, Foster Wheeler the pulverizers.

Emissions control at Dallman begins with Foster Wheeler’s Vortex series of split-flame, low-NO_x burners in the boiler. Downstream of the boiler, an SCR further reduces NO_x, next is an activated carbon injection system. A fabric filter, an FGD system, and wet electrostatic precipitator (WESP) to remove acid mist and ultra-fine particulate from the flue gas complete the emission reduction equipment. Emerson’s Ovation control system will monitor and control the boiler, as well as the burner management system, bottom ash handling, combustion control system, coal-handling system, and FGD and SCR systems.

Emission limits are 0.05 lb/MMBtu for NO_x, 0.07 lb/MMBtu for SO₂ (99 percent removal), 0.10  lb/MMBtu for CO, 0.012 lb/MMBtu for PM₁₀ (excluding condensibles), and  90 percent Hg removal. The unit is designed to burn Illinois coal from the Viper mine in Elkhart—700,000 tons/year.

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