1-27310714 POWER - Hitachi Power Systems - (Page 1)
BUSINESS AND TECHNOLOGY FOR THE GLOBAL GENERATION INDUSTRY
www.powermag.com Vol. 153 • No. 10 • October 2009
Seminole Generating Station, Palatka, Florida
Owner/operator: Seminole Electric Cooperative Inc.
Complying with a corporate environmental policy requires much more than just writing a check for equipment upgrades. It takes a dedicated and knowledgeable staff that’s willing to invest years of work to permanently reduce a plant’s environmental footprint. The staff of Seminole Generating Station have completed multiple, incremental plant improvements over the past decade that have significantly reduced air emissions and minimized solid waste disposal.
By Dr. Robert Peltier, PE 1. A key Florida landmark. Seminole Generating Station consists of two 650-MW steam
units that together burn about 11,000 tons of coal daily. Emissions from each unit have been reduced by incrementally upgrading the scrubber, adding low-NOx burners and other combustion system upgrades, and, most recently, adding a selective catalytic reduction system. Synthetic gypsum from the SO2 scrubber is sold to an adjacent wallboard manufacturer. The common stack in the foreground is 695 feet tall. Courtesy: Seminole Electric Cooperative Inc.
eminole Electric Cooperative Inc. (SECI) provides electricity to its 10 member cooperatives serving 46 central and northwestern Florida counties. Formed in 1948, SECI was a “paper generation and transmission (G&T) coop” until the Seminole Generating Station (SGS) was commissioned in January 1984; Unit 2 entered service on December 31, 1984 (Figure 1). SECI is in the process of securing the necessary regulatory approvals for a third unit at SGS. The new plant is to be approximately 750 MW and will use supercritical boiler technology. A final construction schedule has not been determined. SECI is the third-largest G&T in the U.S. based on wholesale energy sales. It owns the two 650-MW coal-fired units at SGS; the Richard J. Midulla Station, consisting of a 500-MW natural gas–fired combined-cycle plant placed into service in January 2002; 310 MW of gas turbine peaking units added in December 2006; and a 15-MW share of Progress Energy Florida’s Crystal River Unit 3 nuclear plant. A combination of long-term capacity and energy purchase agreements from utility and merchant plants, firm renewable capacity, and energy purchase agreements and interchange agreements with 23 other electric utilities completes SECI’s electricity resource mix. SECI produces approximately 43% of its members’ electricity
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1-27310714 POWER - Hitachi Power Systems