A new diagnostics feature in the Rosemount Analytical 6888 in situ flue gas oxygen analyser from Emerson Process Management is helping to maintain optimum oxygen levels in flue gases, optimising the combustion efficiency of large boilers and industrial furnaces.
In an environment of reduced budgets and personnel at plants, the new 6888 enhancements are helping to decrease maintenance requirements and improve measurement accuracy.
The Rosemount Analytical 6888 flue gas oxygen analysers incorporate a ‘calibration recommended’ diagnostic with gas-switching solenoids embedded within the probe electronics, simplifying automatic calibration, and maintaining excellent accuracy. The embedded diagnostic reduces the cost of providing and installing a separate solenoid box, as well as 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 or actual calibrations. A ‘plugged diffuser/filter’ diagnostic is provided for applications that have fly ash or other particulate entrained in the flue gases, which further reduces personnel time and maintenance as well as ensures accuracy.
Among the enhancements in the 6888 analyser is a variable insertion option, which permits ideal placement of the probe into the flue gas duct. With standard length probes from 18” (0.5m) to 12’ (3.65m) in horizontal or vertical installation, the probe can be adjusted at any time on-line to characterise stratification across large ducts.
Doug Simmers, combustion analyser worldwide product manager, Emerson Process Management, Rosemount Analytical observes that the new 6888 has raised the bar on flue gas analyser operation while maintaining exceptional economy for customers. Given the tight budgets and time constrained personnel common in today’s industrial applications, the 6888 provides essential analysis of combustion efficiency, while significantly reducing maintenance time and cost of unnecessary calibrations in an affordable and accurate solution. This improved accuracy not only provides better combustion efficiency, but can also minimise the production of greenhouse gases such as CO2, and of thermal NOx.
Key benefits of the Rosemount Analytical 6888 flue gas oxygen analysers include ease of integration and operation; fully field repairable; all active components replaceable, including the diffuser/filter, sensing cell, heater and thermocouple, and electronics cards; HART and FOUNDATION fieldbus digital communications; and optional Smart Wireless THUM adapter for wireless operation.