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Prediction of Excess Air Factor in Automatic Feed Coal Burners by Processing of Flame Images

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Abstract

In this study, the relationship between the visual information gathered from the flame images and the excess air factor λ in coal burners is investigated. In conventional coal burners the excess air factor λ. can be obtained using very expensive air measurement instruments. The proposed method to predict λ for a specific time in the coal burners consists of three distinct and consecutive stages; a) online flame images acquisition using a CCD camera, b) extraction meaningful information (flame intensity and brightness)from flame images, and c) learning these information (image features) with ANNs and estimate λ. Six different feature extraction methods have been used: CDF of Blue Channel, Co-Occurrence Matrix, L ∞-Frobenius Norms, Radiant Energy Signal (RES), PCA and Wavelet. When compared prediction results, it has seen that the use of co-occurrence matrix with ANNs has the best performance (RMSE = 0.07) in terms of accuracy. The results show that the proposed predicting system using flame images can be preferred instead of using expensive devices to measure excess air factor in during combustion.

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Funding

This work was supported by The Scientific and Technological Research Council of Turkey (TUBITAK, Project number: 114M116) and MIMSAN AŞ.

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Authors and Affiliations

  1. Computer Engineering Department, Inonu University, 44280, Malatya, Turkey

    Muhammed Fatih TALU

  2. Mechanical Engineering Department, Inonu University, 44280, Malatya, Turkey

    Cem ONAT & Mahmut DASKIN

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  1. Muhammed Fatih TALU
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  2. Cem ONAT
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  3. Mahmut DASKIN
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Correspondence to Cem ONAT.

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TALU, M.F., ONAT, C. & DASKIN, M. Prediction of Excess Air Factor in Automatic Feed Coal Burners by Processing of Flame Images. Chin. J. Mech. Eng. 30, 722–731 (2017). https://doi.org/10.1007/s10033-017-0095-3

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  • DOI: https://doi.org/10.1007/s10033-017-0095-3

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