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From 209.18.104.171
Selectrive Catalytic Reduction (SCR) systems will be installed on 100,000 MW of U.S. coal-fired generating capacity by 2004. SCR investment for Nitrogen Oxides (NOx) control will be the largest for any control strategy implemented to date. Many oil and gas-fired generating stations, industrial boilers, co-generation, and combined cycle plants already use SCR or SNCR systems to comply with current and future NOx emission standards. An SCR system is installed in the flue work, often between the economizer and the air heater. An ammonia injection area is followed by a reactor section downstream, which contains catalyst layers to enhance the NOx reduction. The use of the catalyst means that system will function at much lower flue gas temperatures. Soot-blowers or other cleaning measures are utilized in the reactor, depending upon the degree of dust loading. Products & Services
Selective catalytic reduction (SCR) systems inject ammonia into boiler flue gas and pass it through a catalyst bed where the nitrogen oxide gas (NOx) and ammonia react to form nitrogen and water vapor.
Acoustic horns are relatively low-frequency horns that produce vibration at frequencies that will loosen and clean soot or other undesirable particulate buildup on chimneys, catalyst beds, or other process vessels.
Industrial boilers are closed vessels that are used to generate or superheat steam. Activity is produced by the application of heat from combustible fuels, electricity or nuclear energy.
Heating furnaces convert gas, oil, electricity or other fuels into heat for distribution within a structure. They are the central heating devices within HVAC systems.
Burners are heating devices that use air supplied specifically for the combustion of a fuel gas.
Product Announcements
Topics of Interest
The primary requirements of exhaust after treatment systems are low back pressure, low system weight, better emission performance and lower cost. Combinations of these properties provide better engine...
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As the on-highway vehicle industry begins looking ahead to the 2010 exhaust emissions standards, many engine and exhaust system manufacturers are looking at urea-injected selective catalytic reduction...
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Al-Corn Clean Fuel of Claremont, Minnesota, faced what dozens of corn-to-ethanol plants have faced over the last three years. It had to meet environmental requirements for carbon monoxide (CO),...
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Since the 1990 Clean Air Act Amendments (CAAA) were implemented in 1995, a plethora of changes to the operating environment of every electric utility has occurred. Initial (Phase 1) CAAA changes were...
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Infrared thermography is used throughout the petroleum refining industry and has a proven track record of cost saving in many areas of the business. This paper describes the examination and monitoring...
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Technical Articles
Power Plant SCR Units and Ammonia Safety Measures (.pdf)
- Gas Sensing
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