Automated image analysis techniques to characterise pulverised coal particles and predict combustion char morphology

FUEL

卷:259

Article

Perkins, Joseph¹  Williams, Orla¹  Wu, Tao²  Lester, Edward¹ 

[1] Univ Nottingham, Fac Engn, Univ Pk, Nottingham NG7 2RD, England

[2] Univ Nottingham Ningbo China, Dept Chem & Environm Engn, Ningbo 315100, Zhejiang, Peoples R China

关键词: Coal characterisation;    Macerals;    Char morphology;    Automated image analysis;    Combustion;    Vitrinite;   

DOI  :  10.1016/j.fuel.2019.116022

来源: Elsevier

【 摘 要 】

A new automated image analysis system that analyses individual coal particles to predict daughter char morphology is presented. 12 different coals were milled to 75-106 pm, segmented from large mosaic images and the proportions of the different petrographic features were obtained from reflectance histograms via an automated Matlab system. Each sample was then analysed on a particle by particle basis, and daughter char morphologies were automatically predicted using a decision tree-based system built into the program. Predicted morphologies were then compared to 'real' char intermediates generated at 1300 degrees C in a drop-tube furnace (DTF). For the majority of the samples, automated coal particle characterisation and char morphology prediction differed from manually obtained results by a maximum of 9%. This automated system is a step towards eliminating the inherent variability and repeatability issues of manually operated systems in both coal and char analysis. By analysing large numbers of coal particles, the char morphology prediction could potentially be used as a more accurate and reliable method of predicting fuel performance for power generators.

【 授权许可】

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