Craig Generating Station Unit 2 Selective Catalytic Reduction
Award of Merit
Owner: Tri-State Generation
Lead Design Firm: Black & Veatch
General Contractor: TIC - The Industrial Co.
Other Designers: Mitsubishi Hitachi
Tri-State Generation’s electrical plant in Craig, Colo., runs on low-sulfur coal. Burning coal releases nitrogen oxides, which are strictly regulated. To meet current regulations, Tri-State decided on a technology called selective catalytic reduction (SCR) for one of the units at the plant. The technology uses catalysts to reduce nitrogen oxides. Building the new SCR superstructure included demolition of existing steel and ductwork, followed by installation of new structural steel, ductwork and the SCR technology. Also included were associated siding, roofing and HVAC units for the SCR enclosure.
One of the key challenges was the close proximity of adjacent units and an extremely compact jobsite. The team overcame this through an inventive materials-handling and crane-operation plan. With the project’s completion, Craig’s Unit No. 2 is now operating cleaner than ever.