EMERSON INTRODUCES OXYBALANCE FOR IMPROVED GAS ANALYSIS IN LARGE COMBUSTION PROCESSES
27 January 2007 - Emerson Process Management

Emerson Process Management has unveiled the Rosemount Analytical OxyBalance oxygen display and averaging system for improving gas analysis in large combustion applications. OxyBalance provides vital oxygen data that helps operators set ideal fuel-to-air ratios and effectively balance individual burners or sets of burners.

"A large coal-fired boiler may have 10-15 probes gathering O2 data from various points in a large duct. It is very important that an accurate average be calculated from those probes in order to ensure the fuel-to-air ratio is set at optimal levels. While the DCS control system often has the capability to do the averaging function, it's also of great importance to be able to see the probe-to-probe stratification profile across a large duct," said Doug Simmers, product manager for Rosemount Analytical. "The OxyBalance provides both the averaging and burner variability information that is critical to operators, ultimately minimizing wasted resources and optimizing plant efficiency."

Emerson's new OxyBalance is engineered to graphically display up to eight autonomous O2 measurements, and provide variable time-scale trends for each probe value. From these readings, the system can generate up to four programmable O2 averages with any failed or calibrating probes' data automatically removed from the average, assuring operators of an accurate reading every time.

Additionally, no failure within the OxyBalance system can affect the individual 4-20 mA signals coming from each probe. This is unlike competitive systems that can lose all of the probe signals and averages with a single power supply failure.

The Rosemount Analytical OxyBalance display and averaging system is compatible with all Rosemount Analytical oxygen probes, including the Oxymitter, and can be used with any competitive O2 probe system with a 4-20 mA signal output.

http://www.emersonprocess.com

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