The Wisconsin Department of Natural Resources is taking comment until Jan. 25 on its intention to approve for Wisconsin Electric Power d/b/a We Energies air permitting that would allow a major upgrade of the Port Washington Generating Station.
Port Washington is a nominal 1,090-MW natural gas-fired station consisting of two similar electric generating units. Each unit consists of two combustion turbine generators (CTG) and one steam turbine electric generator. Each CTG is equipped with a heat recovery steam generator (HRSG) which provides steam to the steam turbine common to that unit. Each HRSG is equipped with duct burners for supplemental natural gas firing, oxidation catalysts for the control of carbon monoxide (CO) and organic compound (VOC) emissions, and selective catalytic reduction (SCR) systems for the control of NOx emissions.
We Energies is proposing two projects; the Advanced Gas Path (AGP) Project and the Duct Burner Pyro-Bloc Project.
- The work proposed for the AGP will provide improved materials, design, and extended component life of the CTGs by replacing the existing turbine components exposed to hot combustion gases with new, improved components. The new turbine components are expected to allow for increased firing temperatures and result in improved turbine efficiency and increased electric output. At design conditions, the output of each CTG is expected to increase from approximately 169 MW to approximately 180 MW, and the overall power block heat rate is expected to improve by about 0.9%.
- The Duct Burner Pyro-Bloc Project will include changes to the HRSG insulation downstream of the duct burner to prevent insulation problems from limiting utilization of the duct burners. The Pyro-Bloc insulation is a ceramic fiber system designed for high temperature furnaces.
The Port Washington plant is located in Port Washington, Wisconsin, at 146 South Wisconsin St. on the west shore of Lake Michigan.