A severe furnace vibration was developed in a gas-fired package boiler during an initial operation. The vibration occurred at higher loads and was characterized by an acoustic standing wave residing inside the furnace in the front-to-rear direction along a burner axis. Theoretical predictions indicated that the thermoacoustic behavior of the burner/furnace system operated in an unstable range explaining the underlying cause of the vibration problem. For the elimination of the vibration problem, a two-step solution was envisioned: (1) The mode of fuel injection was modified in order to affect the flame’s oscillatory behavior and its interaction with the acoustic waves in the enclosed spaces of the burner conduits and the furnace. This step was successful in mitigating the vibration in a still thermoacoustically unstable system. (2) A full elimination of the vibration may be achieved by making the system thermoacoustically stable by modifying the cold air portion of the system. Both the step 1 solution, which suppressed the thermoacoustic oscillation, and the step 2 solution of making the system thermoacoustially stable will allow the boiler to operate without vibration at all loads. This paper gives a detailed description of the issues involved.
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June 2009
Technical Briefs
Elimination of Thermoacoustic Furnace Vibration in a Gas-Fired Package Boiler: A Case Study
Frantisek L. Eisinger,
Frantisek L. Eisinger
Fellow ASME
Foster Wheeler North America Inc.
, Perryville Corporate Park, Clinton, NJ 08809-4000
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Robert E. Sullivan
Robert E. Sullivan
Mem. ASME
Foster Wheeler North America Inc.
, Perryville Corporate Park, Clinton, NJ 08809-4000
Search for other works by this author on:
Frantisek L. Eisinger
Fellow ASME
Foster Wheeler North America Inc.
, Perryville Corporate Park, Clinton, NJ 08809-4000
Robert E. Sullivan
Mem. ASME
Foster Wheeler North America Inc.
, Perryville Corporate Park, Clinton, NJ 08809-4000J. Pressure Vessel Technol. Jun 2009, 131(3): 034502 (6 pages)
Published Online: April 20, 2009
Article history
Received:
January 9, 2008
Revised:
October 2, 2008
Published:
April 20, 2009
Citation
Eisinger, F. L., and Sullivan, R. E. (April 20, 2009). "Elimination of Thermoacoustic Furnace Vibration in a Gas-Fired Package Boiler: A Case Study." ASME. J. Pressure Vessel Technol. June 2009; 131(3): 034502. https://doi.org/10.1115/1.3109982
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