Combustion flue gas analyzer helps improve boilers, incinerators, etc.

Rosemount Analytical 6888 analyzer helps reduce emissions and improve efficiency of combustion processes.


Emerson has released its latest solution for combustion flue gas analysis, the Rosemount Analytical 6888 in-situ O2 analyzer. Emerson has released its latest solution for combustion flue gas analysis, the Rosemount Analytical 6888 in-situ O2 analyzer. The 6888 analyzer provides accurate measurement of the oxygen remaining in the flue gases coming from combustion processes such as boilers, incinerators, kilns, process heaters, and industrial heating furnaces. By maintaining the ideal level of oxygen in the flue gases, optimal efficiency is achieved and the lowest levels of NOx, CO, and CO2 are produced.

The design of the 6888 places a zirconium oxide sensing element at the end of a probe which can be inserted directly into a flue gas stream. Probe lengths are available from 18 in. to 12 ft, and a slip mounting option provides the ability to mount a long probe at any insertion depth. Signal conditioning electronics reside in the head of each probe, eliminating the need for expensive signal cable.

The 6888 is fully field-repairable. All active components can be replaced including the diffuser/filter, sensing cell, heater, thermocouple, and all electronics cards. A dual-channel operator interface unit provides an easy-to-use method of set-up, calibration and failure diagnostics.

The company says the new internal electronics capabilities of the unit offer unique optional features never before possible in an O2 analyzer:

• Calibration recommended diagnostic – Since the calibration frequency of an oxygen analyzer is highly application-dependent, the Xi electronics of the 6888 provide an on-line diagnostic that determines when calibration should be conducted. This feature greatly reduces unneeded calibrations, technician time, and calibration resources. The feature can trigger a fully automatic calibration by sequencing solenoids to introduce calibration gases to the sensing cell. Calibrations can be conducted on-line while the furnace is in operation.

• Continued operation through process upsets – If process upsets cause flue gas temperatures to exceed the normal sensing cell heater temperature (736 to 1,357 °F), the heater is turned off, the process is permitted to heat the sensing cell, and the electronics calculate the oxygen content of the flue gases on the fly. If process upsets cause a reducing condition (flue gas oxygen levels decline to zero), a stoichiometer feature provides an indication of the level of oxygen deficiency during this event.

• Plugged diffuser diagnostic – In applications where there is a heavy particulate loading in the flue gas stream, this feature notes the return-to-process time after calibration gas is turned off. As the time extends, the diagnostic will indicate the need for a diffuser replacement.

“As the needs and compliance demands for flue gas analysis become greater, we are making our Rosemount Analytical instruments more and more accurate and easier to use to meet our customers’ requirements. The 6888 promises real savings in time and resources for users, as well as a way to achieve compliance with government regulations,” said Dave Anderson, marketing director, Emerson Process Management, Rosemount Analytical.

Edited by Peter Welander,

No comments
The Top Plant program honors outstanding manufacturing facilities in North America. View the 2013 Top Plant.
The Product of the Year program recognizes products newly released in the manufacturing industries.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
A cool solution: Collaboration, chemistry leads to foundry coat product development; See the 2015 Product of the Year Finalists
Raising the standard: What's new with NFPA 70E; A global view of manufacturing; Maintenance data; Fit bearings properly
Sister act: Building on their father's legacy, a new generation moves Bales Metal Surface Solutions forward; Meet the 2015 Engineering Leaders Under 40
Cyber security cost-efficient for industrial control systems; Extracting full value from operational data; Managing cyber security risks
Drilling for Big Data: Managing the flow of information; Big data drilldown series: Challenge and opportunity; OT to IT: Creating a circle of improvement; Industry loses best workers, again
Pipeline vulnerabilities? Securing hydrocarbon transit; Predictive analytics hit the mainstream; Dirty pipelines decrease flow, production—pig your line; Ensuring pipeline physical and cyber security
Upgrading secondary control systems; Keeping enclosures conditioned; Diagnostics increase equipment uptime; Mechatronics simplifies machine design
Designing positive-energy buildings; Ensuring power quality; Complying with NFPA 110; Minimizing arc flash hazards
Building high availability into industrial computers; Of key metrics and myth busting; The truth about five common VFD myths

Annual Salary Survey

After almost a decade of uncertainty, the confidence of plant floor managers is soaring. Even with a number of challenges and while implementing new technologies, there is a renewed sense of optimism among plant managers about their business and their future.

The respondents to the 2014 Plant Engineering Salary Survey come from throughout the U.S. and serve a variety of industries, but they are uniform in their optimism about manufacturing. This year’s survey found 79% consider manufacturing a secure career. That’s up from 75% in 2013 and significantly higher than the 63% figure when Plant Engineering first started asking that question a decade ago.

Read more: 2014 Salary Survey: Confidence rises amid the challenges

Maintenance and reliability tips and best practices from the maintenance and reliability coaches at Allied Reliability Group.
The One Voice for Manufacturing blog reports on federal public policy issues impacting the manufacturing sector. One Voice is a joint effort by the National Tooling and Machining...
The Society for Maintenance and Reliability Professionals an organization devoted...
Join this ongoing discussion of machine guarding topics, including solutions assessments, regulatory compliance, gap analysis...
IMS Research, recently acquired by IHS Inc., is a leading independent supplier of market research and consultancy to the global electronics industry.
Maintenance is not optional in manufacturing. It’s a profit center, driving productivity and uptime while reducing overall repair costs.
The Lachance on CMMS blog is about current maintenance topics. Blogger Paul Lachance is president and chief technology officer for Smartware Group.