Archive: Coal

Obama Answers Critics of Climate Allowance Auction

In the face of growing criticism from congressional Democrats of his plan to require electric utilities and other industries to pay for greenhouse gas emission allowances, President Obama told business leaders he is willing to negotiate on the issue, but warned that broad, free allowance allocations would mask the carbon price signal economists say is crucial to speed the deployment of clean technologies needed to fight global warming.

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Best Management Practices for Coal Ash Ponds

The unfortunate coal ash spill at the Tennessee Valley Authority’s (TVA’s) Kingston Fossil Plant that occurred on December 22 has heightened national awareness of the problems associated with utilities’ coal ash surface impoundments if they are not properly maintained.

"Blueprint" Your Pulverizer for Improved Performance

Pulverizer throughput is determined by the coal fineness desired for a given coal. However, compromising on coal fineness when your pulverizer isn’t up to snuff can increase NO x and cause many furnace problems. Your least costly option for increasing pulverizer capacity is to pay careful attention to key dimensions and critical tolerances during your next overhaul.

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Polish Plant Beats the Odds to Become Model EU Generator

Once a Soviet satellite, Poland is now transforming into a thoroughly modern nation. To support its growing economy, this recent European Union member country is modernizing its power industry. Exemplifying the advances in the Polish electricity generation market is the 460-MW Patnów II Power Plant — the largest, most efficient (supercritical cycle), and environmentally cleanest lignite-fired unit in the country.

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Sri Lanka Commissions Major Thermal Power Plant

The Sri Lankan government in December commissioned the first phase of the 300-MW Kerawalapitiya Thermal Power Plant, the nation’s biggest combined-cycle power plant project. The $300 million plant in the western part of the country commenced operations by generating 200 MW (Figure 7). In its second phase, it will expand to 300 MW. Per government estimates, power produced by the plant is priced at about 20 rupees or $0.18/kWh.

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TVA Containment Pond Bursts, Causing Massive Coal Ash Flood

Just after midnight on Dec. 22, 2008, a 40-acre pond holding coal combustion waste for a Tennessee Valley Authority (TVA) steam power plant ruptured, sending a wave of wet ash across 300 acres of rural land in Harriman County, Tenn. It was the largest coal slurry spill in U.S. history — more than three times the size of the Martin Country, Ky., sludge spill of 2000, and about eight times that of the 1972 Buffalo Creek flood in West Virginia. Unlike that flood, which killed 125 people and injured scores others, this one, Tennessee authorities reported, resulted in no serious injuries or hospitalizations.

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Custom FRP Trench Drains Speed Up FGD System Installation

The flue gas desulfurization process requires the use of aggressive liquids that significantly shorten the life of typical construction materials such as metals and concrete. That makes fiberglass-reinforced plastic (FRP) the material of choice for many components in a typical flue gas desulfurization (FGD) system.

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A New Instrument for In Situ SCR NOx Measurement

A zirconium oxide sensor technology originally developed for automotive applications could make in situ, simultaneous measurement of O2 and NOx a breeze for coal-fired power plants.