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Erschienen in:
2023 | OriginalPaper | Buchkapitel
Effect of Wearing Impellers on Multiphase Flow and Desulfurization During KR Mechanical Stirring Process
verfasst von : Wei Chen, Yanyu Zhao, Lifeng Zhang
Erschienen in: Materials Processing Fundamentals 2023
Verlag: Springer Nature Switzerland
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Abstract
It is of great significance to study the variation of the multiphase flow during the entire service process of an impeller to improve the dispersion of the desulfurizer and the desulfurization efficiency during the KR desulfurization process. In the current study, the key dimensions of an actual KR impeller during the service process were quantitatively measured first. Then, a three-dimensional model coupled with the k-ε turbulence model, VOF multiphase flow model, DPM model, UDS model, and unreacted core desulfurization model was established to predict the multiphase flow and desulfurization during the KR mechanical stirring process with different wearing impellers. The results show that with the increase of the wear degree of the impeller, the stirring effect was gradually weakened, resulting in a gradual weakening of the desulfurization efficiency. The desulfurization end sulfur content was 58.2 ppm after the impeller employed 220 heats, which was more than 4 times higher than the 13.0 ppm with a new impeller.