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AMETEKLand - Infrared thermometry is used in a wide range of industrial processes to measure the temperature of objects as diverse as a blast furnace shell, glass in a melt tank or the clinker in a cement kiln.
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December 2022, MARIETTA, GA ~ In each of these cases, the thermometer works by measuring the intensity of radiation emitted by the object at a specific wavelength. Typical applications like these measure the surface temperature of a solid or liquid, but it is also possible to measure the temperature of a hot gas using infrared pyrometry. Gas temperatures are important in many furnaces. The furnace exit gas temperature (FEGT) is an important parameter in the operation of a steam boiler. Its value must be held within a closely defined range. Excessive temperature can damage the boiler tubes, while a low value reduces efficiency, increases fuel costs, and creates additional carbon dioxide emissions. A severe problem occurs when the FEGT rises above the ash fusion temperature, at which point the ash particles liquefy and rapidly deposit on the heat transfer surfaces. Municipal waste incinerators require a minimum temperature and residence time to ensure complete destruction of the waste materials. This is especially important when plastics are being incinerated because incomplete destruction can lead to emissions of highly toxic chemicals such as dioxins...
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