OCR Text |
Show The major contribution provided by the N N model for firing rate monitoring is elimination of the influence due to stoichiometry changes and filtering (smoothing) signal fluctuations. Combining flame emission monitoring along the direction of flow and perpendicular to the flow provides the necessary information to determine the burners stoichiometry and firing rate. V. FUTURE DEVELOPMENT The results of this study shows that both stoichiometry and firing rate can be monitored by selecting the appropriate wavelength regions from the flame emission spectrum. Strategic positioning of the optical sensors will provide sufficient spectral information to monitor and control both firing rate and stoichiometry. This method should not be used solely to control the burner, but more as secondary means to provide additional information to the controller on the burners status. In addition to monitoring the operating condition of the burner, the sensors can also alert operators of potential problems, such as structural damage interfering with the flame. Future work will integrate the combination of sensors into the burner and conduct long term tests at an industrial site. The industrial tests here focused on glass melting burners however the methodology is certainly applicable to other processes such as, waste incineration, fritt melting, etc. For combustion systems using oxy-fiiel or enriched air, the method is beneficial due to the increased sensitivity resulting from stronger flame emission intensity. 16 |