Lakeland gets final approval on SO2 cuts at two McIntosh units

The Florida Department of Environmental Protection on July 30 issued a final air construction permit to Lakeland Electric which authorizes restrictions on sulfur content of fuel oil on C.D. McIntosh Unit 1 and prohibits the use of petroleum coke in Unit 3.

The McIntoish facility is located in Polk County. This permit restricts the sulfur content of fuel oil to 0.7% for Unit 1 and removes petroleum coke, a very high-sulfur fuel, as an authorized fuel for Unit 3.

  • Fuel oil deliveries into the Unit 1 fuel oil storage won’t be able exceed 0.7% sulfur content, by weight. This fuel sulfur limitation shall become effective upon the effective date of the U.S. Environmental Protection Agency’s approval of this specific requirement in the Florida Regional Haze State Implementation Plan (SIP).
  • Petroleum coke will not be fired in the coal-fired Unit 3. Again, this prohibition becomes effective upon the effective date of EPA’s approval of this specific requirement in the Florida Regional Haze SIP.

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. 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 prior 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.
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.