Indiantown plant, targeted for shutdown, is a pulverized coal facility

The Indiantown Cogeneration Plant is a 330-MW facility which generates electricity for sale to Florida Power & Light and exports steam to the Louis Dreyfus Citrus Processing Plant.

FPL on June 20 filed a petition with the Florida Public Service Commission (PSC) to request approval to purchase this plant, with which FPL has a long-term power purchase contract. Upon taking ownership of the Indiantown Cogeneration facility, which is currently owned by Calypso Energy Holdings LLC, FPL plans to immediately reduce the plant’s operations with the intention of eventually phasing the plant out of service.

The Indiantown facility includes one high-pressure pulverized coal main boiler (PC boiler) rated at 3,422 million British thermal units (MMBtu)/hour heat input, and has a nominal net electrical power output of approximately 330 MW. It is permitted to fire natural gas, propane, or No. 2 fuel oil for startup, shutdown, or load changes. That is according to an air permit renewal issued in November 2014 by the Florida Department of Environmental Protection.

Also included under the permit are two natural gas (or propane) fired identical auxiliary boilers used for supplying steam to the steam host during times when the PC boiler is offline, as well as during PC boiler startup and shutdown periods. The two identically sized packaged water-tube steam boilers have a combined rated maximum capacity of 350 MMBtu/hr.

The stack height is 495 feet. Stack exit diameter is 16 feet. Volumetric flow rate is 1,123,700 actual cubic feet per minute (acfm) at 140 degrees Fahrenheit. Exit velocity is 93.2 feet per second. The unit commenced commercial operation in July 1995.

The unit is equipped with low-NOX burners, over fire air, a steam coil air heater and air preheater, dual register burners and wind box design, a selective catalytic reduction (SCR) system, spray dryer absorber, and fabric filter baghouse. An acrylic acid polymer can be added to the lime slurry used in the spray dryer absorber.

The coal handling system includes transport, crushing, and storage equipment, and supports the operation of the pulverized coal main boiler. Particulate matter (PM) emissions are controlled by: the use of fabric filter baghouses on the unloading building, storage area, crusher, and the top of the silo; enclosed conveyors and conveyor transfer points; and wet suppression on the coal railcar unloading operation, drop onto pile in the coal storage building, and outdoor coal pile as needed. The overall maximum throughput rate is approximately 1,100 tons per hour.

U.S. Energy Information Administration shows the Indiantown plant taking coal in the first quarter of this year from the Boone North #1 surface mine in southern West Virginia through Mabanaft Coal Trading, under spot market arrangements.

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.