Oklahoma Gas & Electric (OG&E) has requested a construction permit to implement the controls and emission limits required by the Best Available Retrofit Technology (BART) program at its gas-fired Seminole power plant.
The Oklahoma Department of Environmental Quality on Feb. 9 went out for comment on the changes. “The modifications include retrofitting all three boilers (Units 1, 2, & 3) with low NOX combustion systems including Low-NOX burners and overfire air systems and appurtenances necessary for proper operation,” the agency said in a public notice. “OG&E is also proposing to retrofit Units 1 and 2 with flue gas recirculation systems (FGR). Unit 3 is already equipped with FGR. Construction is expected to begin in the spring of 2015 with Unit 2, followed by Unit 1 in the spring of 2016, and Unit 3 in the spring of 2017.”
All three units are currently considered “grandfathered” and currently do not have specific emission limits established in the current permit. This permit will also establish that the current BART NOx emission limits for each of the affected units are based on a 30-day rolling average in accordance with the BART submittal.
OG&E has also requested to replace the existing natural gas-fired auxiliary boiler (EUG3) at Seminole. The existing “grandfathered” boiler was constructed in 1974 and is no longer operational. The replacement unit is similar in size and will be used for house heat at the facility. The new boiler is a natural gas-fired 40.4 MMBTUH Cleaver-Brooks Model CBEX Elite.
The Seminole facility consists of three natural gas-fired Babcock and Wilcox El-Paso type boilers capable of producing steam. Units 1-3 use natural gas as their primary fuel and will be limited to using #2 fuel oil as a secondary fuel during periods of gas curtailment, gas supply emergencies, or periodic testing on liquid fuel.