Development of Computational Capabilities to Predict the Corrosion Wastage of Boiler Tubes in Advanced Combustion Systems

 

Two fireside corrosion furnace facilities used for<br/>the laboratory testing: samples of ten different<br/>alloys and three weld-clad coating materials are<br/>being tested in the simulated upper furnace<br/>conditions. Samples of ten different alloys and two<br/>weld-clad coating materials are being tested in<br/>the lower furnace conditions.
Two fireside corrosion furnace facilities used for
the laboratory testing: samples of ten different
alloys and three weld-clad coating materials are
being tested in the simulated upper furnace
conditions. Samples of ten different alloys and two
weld-clad coating materials are being tested in
the lower furnace conditions.
Performer: 
Babcock and Wilcox Co. - Alliance - OH
Website:  Babcock & Wilcox Power Generation Group, Inc.
Award Number:  FC26-07NT43097
Project Duration:  08/14/2007 – 08/31/2014
Total Award Value:  $2,536,966
DOE Share:  $2,027,036
Performer Share:  $509,929
Technology Area:  Plant Optimization Technologies
Key Technology:  High Performance Materials
Location:  Barberton, OH

Project Description

Staged combustion produces reducing/sulfidizing conditions that are particularly corrosive to the lower furnace walls. On the other hand, the conditions at superheaters/reheaters are typically oxidizing. However, due to relatively high metal temperatures, the superheater/reheater tubes tend to suffer from severe coal ash corrosion attack due to alkali metals contained in the ash. The problem will be further intensified when the steam outlet temperatures of advanced combustion systems are to increase significantly. To address these corrosion concerns, Babcock & Wilcox (B&W) intends to develop corrosion models in this program that are capable of predicting lower furnace and superheater/reheater corrosion wastage. Because corrosion attack is thermally activated, the effect of temperature will also be investigated. Ohio State University faculty will support B&W's efforts by contributing their technical expertise in the area of high temperature corrosion.

Project Benefits

This project will develop computational models to predict corrosion associated with staged combustion techniques used to reduce NOx emissions. The project will facilitate capital cost improvements in boiler design tailored to withstand the locally corrosive environments associated with staged combustion resulting in lower operating costs.

Contact Information

Federal Project Manager 
Vito Cedro: vito.cedro@netl.doe.gov
Technology Manager 
Robert Romanosky: robert.romanosky@netl.doe.gov
Principal Investigator 
Steven Kung: Sckung@babcock.com
 

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