Abstract
Design and application of low-NOX burners and other combustion modification technologies to coal-fired boilers rely largely on the designer's expertise, garnered from previous experience and engineering intuition. Use of this ‘tried-and-true’ methodology for low-NOX technologies results in some risk when these technologies are applied to conditions or boiler designs that are outside of the normal experience base. GE Energy has found that the use of advanced design tools such as computational fluid dynamics (CFD) modeling in designing low-NOX burners can ensure an effective match between the burner design and the combustion system. However, the previous design experience also indicates that model validation against test data is essential to the success of applying CFD simulation in facilitating burner design. This paper summarizes the results of a study of a low-NOX burner for coal-fired boilers. The study was focused on validating the CFD predictions on NOX emission against a single burner full scale experimental measurements. The CFD predictions along with the full scale test results were also used to evaluate design changes in the burner to ensure optimal performance for the particular application.
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