Product category:
Gas monitoring and analysis
News Release from: Emerson Process Management | Subject: Oxymitter 4000
Edited by the Processingtalk Editorial
Team on 24 May 2005
Shell Canada meets environmental
emissions
The Shell Canada Burnt Timber Plant in the Alberta Foothills is successfully controlling combustion processes in a sulphur plant tail gas incinerator with an Oxymitter 4000 Oxygen Transmitter.
The Shell Canada Burnt Timber Plant in the Alberta Foothills is successfully controlling the combustion processes in a sulphur plant tail gas incinerator with a Rosemount Analytical Oxymitter 4000 In Situ Oxygen Transmitter The Rosemount Analytical analyser is designed to perform reliably in the harsh environment, with its robust sensor cell that is resistant to sulphur corrosion
This article was originally published on Processingtalk on 23 Feb 2007 at 8.00am (UK)
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Gaining effective control has enabled the plant to operate within emissions guidelines, and realise fuel savings and maintenance efficiencies.
The function of the tail gas incinerator is to oxidise all sulphur species to sulphur dioxide (SO2) prior to release in the flue gas.
The existing flue gas analyser at Shell Canada Burnt Timber was providing inaccurate readings in the incinerator.
These inaccurate readings caused the plant to have excess SO2 emissions that exceeded the plant operating permit.
Operators rely upon continuous measurement of oxygen to control the combustion process.
When readings are not optimal, plants are unable to maintain a proper air-to-fuel ratio - causing the burning of unnecessary fuel and extra maintenance hours to resolve the problem.
Because the oxygen and combustibles levels in the incinerator at the Burnt Timber plant were fluctuating, it was difficult to maintain an air-to-fuel ratio that was sufficient for oxidation of the sulphur compounds to SO2.
The Oxymitter 4000 now provides accurate oxygen flue gas readings, ensuring that the incinerator air-to-fuel ratio is optimised.
Excess oxygen levels of 6 to 10 percent are typical for sulphur plant incinerators.
The recommended operating range for excess oxygen is 2 to 5 percent.
Since the installation of the Oxymitter 4000, Burnt Timber has operated the incinerator excess oxygen at 1 percent.
The most significant advantages of operating within the recommended range include proper oxidation of sulphur compounds, a reduction in fuel gas usage and a reduction in CO2 (a greenhouse gas) emissions. Request a free brochure from Emerson Process Management ...
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