Kiewit chooses Alstom clean air technology to meet stringent new emissions standards
Kiewit chooses Alstom clean air technology to meet stringent new emissions standards
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Brayton Point 3 (USA) to see reduced SO2 and mercury emissions.
Kiewit Corporation, one of the largest construction and engineering firms in North America, has selected world leading air quality control systems provided by Alstom to meet stringent Massachusetts clean air regulations for Dominion Resources Brayton Point Station, located in Somerset, MA. Dominion Resources purchased Brayton Point in 2005 and has since embarked on an ambitious program of environmental improvements.
Under the terms of the USD 35 million contract, Alstom will supply a dry flue gas desulphurization (FGD*) system including NID reactors**, fabric filters, mixer/hydrators, day silos, inlet and outlet plenums, support steel, and access platforms for unit 3 of the Brayton Point power plant, New England's largest fossil-fueled generating facility with an output of 1568 MW. Unit 3 has an output of 630 MW.
The contract brings Alstoms installed NID capacity to 7,600 MW, the largest NID application in the world.The new system will significantly reduce the units SO2 emissions and mercury emissions , which will enable the power plant to comply with multi-pollutant emission regulations imposed by the Massachusetts Department of Environmental Protection***.
The systems compact, modular design helps to facilitate the construction and reduce capital costs. The NID system is capable of achieving guaranteed performance at full boiler load with 7 of the 8 compartments in service. This feature is a key differentiator that brings added reliability and operational flexibility.
Editors Notes
*: Flue gas desulphurisation (FGD) systems remove sulphur dioxide released from coal-fired power plants. Alstom offers wet, seawater and dry processes for FGD to meet the varying economic requirements of its customers.
**: The NID system is a Dry Flue Gas Desulphurization (DFGD) process that is based on the reaction between SO2 and Ca(OH)2 in humid conditions. The humidified mixture f hydrated lime and reaction product is
injected into the NID system absorber and cools the inlet flue gas by evaporation. The cooled flue gas then
flows to the dust collector, preferably a Fabric Filter (FF) or an Electrostatic Precipitator (ESP), where the
particles in the flue gas are removed and recycled back through the NID FGD system.
***: Regulation 310 CMR 7.29 regulates emissions of sulfur dioxide, carbon dioxide, nitrogen oxides, and mercury from power plants.
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