Archive: O&M

Coal Plant O&M: Smart Sootblower Tailors Cleaning to Need for It / Blending’s Impact on Coal Quality

The 1990 amendments to the Clean Air Act require coal-fired power plants to reduce their emissions of the pollutant SO2. To do so, many have switched to, or are considering switching to, Powder River Basin (PRB) coal. Unfortunately, PRB coal has a tendency to leave excessive and tenacious deposits on boiler heat-exchange surfaces. Complicating the problem, the distribution of the deposits is far from uniform.

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PRB Tech Notes: Lawrence Energy Center Showcases Winning Plant

Lawrence Energy Center (LEC) proudly hosted about 60 representatives of the Powder River Basin Coal Users’ Group (PRBCUG) at its July 24th open house, luncheon, and plant tour. LEC was named the PRBCUG’s 2007 Plant of the Year at this year’s ELECTRIC POWER Conference and Exhibition in Chicago, May 1 – 3. Traditionally, the winning […]

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Lignite Drying: New Coal-Drying Technology Promises Higher Efficiency Plus Lower Costs and Emissions

The U.S. Department of Energy (DOE) and Great River Energy are testing a new coal-drying technology that could dramatically reduce the emissions of lignite-burning power plants. The project was selected for funding during Round I of the DOE’s Clean Coal Power Initiative (CCPI), a series of competitions to demonstrate a range of promising clean-coal technologies. […]

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Drum pressure the key to managing boiler stored energy

At the heart of most boiler combustion control systems (and most coordinated boiler/turbine control systems as well) is throttle pressure correction, usually applied by the "master controller." Throttle pressure is considered a key variable to control because it represents the energy balance between the boiler and the turbine. When throttle pressure is constant, the boiler […]

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Focus on O&M (June 2007)

Ready for your NERC close-up? / Synthetic oils for industrial applications

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Focus on O&M (May 2007)

 

Cyber security and the grid; Harnessing the Yangtze;

Hydraulic system overhaul;

O&M problems not caused by cycling;

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Coal Plant O&M: River Locks and Barges Are an Aging Workforce, Too

During 2005, about 150 million tons of coal were transported to power plants by hopper barges plying U.S. inland waterways. With coal-fired plants expected to continue producing 50% of America’s electricity, coal barge traffic is not likely to fall off. In fact, it may increase, for two reasons. One is cost. Shipping coal by barge […]

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Pollution Control: Low-NOx Combustion Retrofit Options

Reducing NOx emissions from large utility coal-fired boilers has been a primary focus of the U.S. power generation industry since passage of the 1970 Clean Air Act and subsequent legislation. By the early 1990s, nearly all such boilers had installed some form of low-NOx burner (LNB) technology and/or overfire air (OFA) — the least expensive […]

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Pollution Control: LCRA Fayette Lowers NOx Below 0.10 lb/mmBtu

The Fayette Power Project (FPP, aka the Sam K. Seymour Power Station) is a three-unit, coal-fired generating plant sited near La Grange, Texas (Figure 1). Units 1 and 2, each with a nominal rating of 600 MW, are co-owned by the Lower Colorado River Authority (LCRA) and Austin Energy (AE). LCRA is a conservation and […]

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Focus on O&M  (April 2007)

Control pollution and slagging on a shoestring / Keeping HRSGs young, cool, and clean / Natural air conditioning