Laramie River Station environmental controls project complete

(Feb. 9, 2021) — After more than six years, the environmental controls project at Laramie River Station is complete.

The project began in 2014 with the Environmental Protection Agency issuing a Regional Haze Federal Implementation Plan, which required selective catalytic reduction (SCR) nitrogen oxides (NOx) emissions control. An agreement in 2016 meant selective non-catalytic reduction (SNCR) equipment could be installed instead on two of the three units. Both SCR and SNCR technology remove NOx emissions but use slightly different technologies.

Laramie River Station Unit 1 was retrofitted with an SCR, which is a reactor that requires catalyst layers and uses anhydrous ammonia to remove NOx from flue gas. Units 2 and 3 were retrofitted with SNCRs, which use liquefied urea to remove NOx emissions.

“The biggest challenge of the project was performing major retrofits to a 35-year-old facility,” said Jim Lund, Basin Electric senior mechanical engineer. “We worked closely with plant staff and engineering and construction partners to ensure we had a quality design and were able to perform the work while maintaining plant operations. There were certain times when we had to shut the plant down, so we coordinated with the plant’s outage schedule. It was a long process, but after it was all said and done we met all our goals for performance, scheduling, and budget.”

Source: Basin Electric Power Cooperative

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