Computational Fluid Dynamics-Based Study of a High Emissivity Coil Coating in an Industrial Steam Cracker,Industrial & Engineering Chemistry Research

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Computational Fluid Dynamics-Based Study of a High Emissivity Coil Coating in an Industrial Steam Cracker
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-11-28 , DOI: 10.1021/acs.iecr.8b04068
Stijn Vangaever ₁ , Pieter A. Reyniers ₁ , Cor Visser ₂ , Dietlinde Jakobi ₂ , Geraldine J. Heynderickx ₁ , Guy B. Marin ₁ , Kevin M. Van Geem ₁

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To assess the effect of applying a high emissivity coating to the reactor coils in a steam cracking furnace, a complete energy balance was made for two cases based on simulations of the radiant section, reactors, convection section, and transfer line exchanger. A base case with a typical emissivity spectrum for a generic high-alloy steel was compared to a case with an artificially increased emissivity corresponding to a high emissivity coating. At the same cracking severity, coating the radiant coils increases the radiant section efficiency by 0.70% absolute, reduces the required furnace firing rate by 1.73%, and reduces the flue gas bridge wall temperature by 14 K. Minor changes to the convection section layout are required to compensate for the shift in duty to the radiant section: the reactor feed is still fully preheated to the targeted crossover temperature, but the production of high pressure steam is reduced.

中文翻译：

基于计算流体力学的工业蒸汽裂解炉高辐射率卷材涂层研究

为了评估在蒸汽裂化炉中对反应堆线圈施加高发射率涂层的效果，基于辐射部分，反应堆，对流部分和传输线交换器的模拟，对两种情况进行了完全的能量平衡。将普通高合金钢具有典型发射率光谱的基本情况与对应于高发射率涂层的人为增加发射率的情况进行了比较。在相同的破裂强度下，对辐射线圈进行涂层可将辐射段效率绝对值提高0.70％，将所需的炉膛燃烧率降低1.73％，并将烟气桥壁温度降低14K。对流段布局的微小变化是要求补偿辐射段的占空比：

更新日期：2018-11-28

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