Flame detecting and diagnosis of combustion in modern coal-fired boilers are very important to the safe and economical operating of power generation unit. So the effective real-time detection of combustion flame stability and in-time judgment are necessary. One of the important characteristics of combustion flame is a combination of flame jet fluctuation and flickering of flame radiation, which is a time random variable and reflects the combustion conditions. In this paper, after the data are acquired through the tests in our university’s laboratory, the power spectrum analysis using algorithm of fast Fourier transformation (FFT) and a self-organized neural network are applied into a diagnostic system for combustion conditions. At first, a time series of radiation intensity values of the flame, which fluctuate at a mean intensity value with a certain frequency are obtained through the photoelectric sensor. And then the time signal is converted to the power spectrum signal through the processing of FFT. Under the stable and unstable combustion conditions, the spectral intensity of the low frequency component of the converted signal has distinct magnitude. According to this method, software for the power spectrum analysis and the self-organized neural networks has been developed.
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ASME 2005 Power Conference
April 5–7, 2005
Chicago, Illinois, USA
Conference Sponsors:
- Power Division
ISBN:
0-7918-4182-0
PROCEEDINGS PAPER
Spectral Analysis of Pulverized Coal Combustion Stability
Yuefeng Yu,
Yuefeng Yu
Shanghai Jiaotong University, Shanghai, P. R. China
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Jun Ma,
Jun Ma
Shanghai Jiaotong University, Shanghai, P. R. China
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Haojie Fan
Haojie Fan
Shanghai Jiaotong University, Shanghai, P. R. China
Search for other works by this author on:
Yuefeng Yu
Shanghai Jiaotong University, Shanghai, P. R. China
Jun Ma
Shanghai Jiaotong University, Shanghai, P. R. China
Haojie Fan
Shanghai Jiaotong University, Shanghai, P. R. China
Paper No:
PWR2005-50323, pp. 785-789; 5 pages
Published Online:
October 27, 2008
Citation
Yu, Y, Ma, J, & Fan, H. "Spectral Analysis of Pulverized Coal Combustion Stability." Proceedings of the ASME 2005 Power Conference. ASME 2005 Power Conference. Chicago, Illinois, USA. April 5–7, 2005. pp. 785-789. ASME. https://doi.org/10.1115/PWR2005-50323
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