The Florida Department of Environmental Protection on Sept. 3 granted a request from Lakeland Electric for an extension of a permit deadline so it can complete scrubber upgrades on its coal-fired McIntosh Unit 3.
On Aug. 25, Lakeland Electric had requested an extension of the expiration date of a a Jan. 9 air construction permit for the C. D. McIntosh Power Plant located in Polk County. Lakeland Electric requested the additional time for completion of flue gas desulfurization system upgrades on the coal-fired Unit 3. Not all upgrades were able to be completed during the March 2015 outage for the unit. Therefore Lakeland Electric requested a one-year extension to allow for the remaining components of the project to be completed during the planned spring 2016 outage. The permit expiration date was extended from Dec. 31, 2015, to Dec. 31, 2016.
The Florida DEP on Jan. 9 had issued the referenced final air construction permit that authorizes the upgrade of the existing wet flue gas desulfurization (FGD) system on Unit 3 to improve SO2 emissions reduction efficiency to comply with the federal Mercury and Air Toxics Standards (MATS). McIntosh Unit 3 is a nominal 364-MW (electric) dry bottom wall-fired fossil fuel fired steam generator. Lakeland Electric’s FGD upgrades include:
- Modifying the tray bottoms in the existing absorber tray;
- Adding new second level absorber tray;
- Replacing mist eliminator trays;
- Adding nozzles per layer (optional);
- Changing nozzle design (optional); and
- Increasing absorber pump speed (optional).
The existing wet FGD with forced oxidation system has two Babcock & Wilcox absorber tower modules that can each process 50% of the flue gas flow or can bypass the flue gas flow.