Flue gas oxygen analyser optimises combustion efficiency

12 August 2014

Emerson Process Management has enhanced the Rosemount Analytical 6888 In Situ Flue Gas O2 analyser, adding new diagnostics that help maintain optimum oxygen levels in flue gases, optimising the combustion efficiency of large boilers and industrial furnaces. 

With many plants struggling with reduced budgets and personnel, the new 6888 enhancements are said to help decrease maintenance requirements and improve measurement accuracy.

The 6888 incorporates a ‘calibration recommended’ diagnostic with gas-switching solenoids embedded within the probe electronics, simplifying automatic calibration and maintaining accuracy. 
Embedded diagnostics reduce the cost of providing and installing a separate solenoid box, and also reduces the effort to wire and pipe between the probe and electronics, decreasing man-hour requirements. Additionally, the calibration recommended diagnostic removes the need to conduct calibrations on a schedule, eliminating many validations (calibrations checks) or actual calibrations. 

The new analyser also includes a ‘plugged diffuser/filter’ diagnostic for applications that have fly ash or other particulate entrained in the flue gases. This feature helps to further reduce personnel time and maintenance as well as helping to ensure accuracy.

Another new feature of the 6888 is a variable insertion option, which permits ideal placement of the probe into the flue gas duct. With standard length probes from 0.5m to 3.65m in horizontal or vertical installation, the probe can be adjusted at any time on-line to characterise stratification across large ducts.

The 6888 offers HART and FOUNDATION fieldbus digital communications, and can also be configured with the optional Smart Wireless THUM adapter for wireless operation.

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