The Basin Electric Power Cooperative board of directors approved the installation of emission control technology on one unit at Laramie River Station at its January meeting that will help the unit achieve compliance with the U.S. Environmental Protection Agency’s Regional Haze Rule.
The emission control technology, selective catalytic reduction (SCR), is a process where an ammonia-based reagent is sprayed into flue gas, converting NOx into nitrogen and water, which is then released through the air heater, scrubber and emissions stack, Basin Electric noted in a Jan. 22 statement. The project was set in motion by EPA’s Regional Haze Rule, which superseded the state of Wyoming’s original state implementation plan that required Basin Electric to install low-NOx burners and over-fired air (OFA) technology on all three units at Laramie River.
The EPA Regional Haze Rule set the NOx emission limit at 0.07 lb/MMBtu on a 30-day rolling average – a limit that can only be achieved using SCR technology in addition to the OFA and low-NOx burners installed on all three units at the plant.
Jim Lund, Basin Electric senior project manager, said that construction will begin in 2017, with the equipment operating by mid 2019. At the peak, there will be about 250 workers for this project on site. The project is estimated to cost about $330 million. The project work will be completed and installed during two major outages, one at the beginning of the project and one at the end.
The Laramie River Station, located east of Wheatland, Wyomin, is one of the largest consumer-operated, regional, joint power supply ventures in the United States. It has three coal-based units: Unit 1 (570 MW net) began operating in 1980; Unit 2 (570 MW net) began operating in 1981;and Unit 3 (570 MW net) began operating in 1982.