Lakeland Electric limiting SO2 emissions from two McIntosh units

Lakeland Electric is pursuing an air permit change for its C.D. McIntosh Jr. power plant in Polk County, Fla., that restricts the sulfur content of fuel oil for Unit 1, and prohibits the future use of petroleum coke in Unit 3.

“As provided in the application, this project involves limiting the sulfur content of fuels to each affected unit and does not result in any emission increases,” said a permit application technical document issued June 27 by the Florida Department of Environmental Protection. “These restrictions, limiting sulfur content of fuel oil in Unit 1, a gas and oil fired boiler, and prohibiting petroleum coke firing in Unit 3, a solid fuel and fuel oil fired boiler, and are taken by the applicant to reduce regional haze pollutants. These restrictions become effective upon EPA’s acceptance of the Florida Regional Haze State Implementation Plan. There are no other changes requested, nor are there any increases in emissions or operating capacity authorized. As such, a PSD review is not applicable.”

Units 1 and 3 are Best Available Retrofit Technology (BART)-affected units under regional haze restrictions. This project restricts the sulfur content of fuel oil to 0.7% for Unit 1. The DEP said in a June 27 notice that it has made a preliminary determination that the proposed project will comply with all applicable state and federal air pollution regulations as conditioned by the draft permit.

Notable is that in March, the DEP approved another Lakeland Electric air permit revision that removed refuse derived fuel (RDF) as an approved fuel for Unit 3.

McIntosh consists of three fossil fuel-fired steam generators, two diesel-powered generators, and two gas turbines. Steam generator Unit 1 is fired with natural gas, No. 6 fuel oil or on-specification used oil generated by the City of Lakeland. Steam generator Unit 2 is fired with natural gas, propane, No. 2 fuel oil or No. 6 fuel oil. Steam generator Unit 3 is fired with coal, natural gas and petroleum coke (to be removed under the pending permit revision). Gas Turbine Peaking Unit 1 is primarily fired with natural gas, or No. 2 fuel oil with a maximum sulfur content of 0.5% by weight. McIntosh Unit 5, a 370-MW combined cycle stationary combustion turbine, is fired with natural gas, or No. 2 fuel oil with a maximum sulfur content of 0.05% by weight.

  • McIntosh 3 is a nominal 364-MW dry bottom wall-fired fossil fuel fired steam generator, said DEP permit documents. The maximum heat input rate is 3,640 million Btu per hour. Unit 3 is equipped with an electrostatic precipitator, a flue gas desulfurization system, and low NOX burners and an overfire air system to control emissions. McIntosh Unit 3 began commercial service in September 1982.
  • McIntosh Unit 1 is a forced draft boiler rated at a nominal load of 90 MW. The unit is fired with natural gas at a maximum heat input rate of 985 million Btu per hour, or No. 6 fuel oil, having a current maximum sulfur content of 2.5% by weight, at a maximum heat input rate of 950 million Btu per hour. This unit is also permitted to burn on-specification used oil generated by the City of Lakeland, at a maximum heat input rate of 950 million Btu per hour. McIntosh Unit 1 began commercial service in February 1971.

U.S. Energy Information Administration data shows JAD Coal Co. out of eastern Kentucky as the sole coal supplier to the McIntosh plant in March, with no petroleum coke deliveries shown for that month. In January, EIA data shows three coal suppliers – JAD Coal (Dayhoit Tipple in Kentucky), Peabody COALSALES (Bear Run mine in Indiana) and Sunrise Coal Sales (Carlisle mine in Indiana) – to McIntosh, again with no petcoke suppliers shown. Incidentally, JAD Coal is a unit of US Coal Corp., Peabody COALSALES is part of Peabody Energy (NYSE: BTU) and Sunrise Coal Sales is an arm of Hallador Energy (NASDAQ: HNRG).

About Barry Cassell 20414 Articles
Barry Cassell is Chief Analyst for GenerationHub covering coal and emission controls issues, projects and policy. He has covered the coal and power generation industry for more than 24 years, beginning in November 2011 at GenerationHub and prior to that as editor of SNL Energy’s Coal Report. He was formerly with Coal Outlook for 15 years as the publication’s editor and contributing writer, and prior to that he was editor of Coal & Synfuels Technology and associate editor of The Energy Report. He has a bachelor’s degree from Central Michigan University.