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Heat transfer of calcined petroleum coke and heat exchange tube for calcined petroleum coke waste heat recovery

机译：煅烧石油焦的传热和煅烧石油焦余热回收的换热管

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摘要

This paper reports the results of heat transfer of calcined petroleum coke and heat exchange tube. The unsteady heat transfer 3D model of single calcined petroleum coke particle layer was set up. The model had been used to investigate detailed heat transfer pathways. The calculated values of calcined petroleum coke temperature showed good agreement with the corresponding available experimental data. The temperature distribution, the heat quantity, the heat flux and the heat transfer contribution rate were studied with different heat transfer times. The results showed that the temperature of the particles near the heat exchange wall decreases rapidly in the early stage of the heat-transfer process, but the temperature of the particles far from the heat exchange wall is almost unchanged. the heat change process can be divided into high-speed stage, fast stage and slow stage. The average heat transfer contribute rate of solid phase is 92.79% and greater than that of gas phase. The contact heat conduction between particles is dominant at any position of the particle layer. The unconventional heat transfer direction distribution was found at the beginning of the heat transfer process. The detailed heat transfer mechanism of calcined petroleum coke and heat exchange tube was clarified. (C) 2018 Elsevier Ltd. All rights reserved.
机译：本文报道了煅烧石油焦和热交换管的传热结果。建立了单层煅烧石油焦颗粒层的非稳态传热3D模型。该模型已用于研究详细的传热途径。煅烧石油焦温度的计算值与相应的可用实验数据显示出良好的一致性。研究了不同传热时间下的温度分布，热量，热通量和传热贡献率。结果表明，在传热过程的早期，热交换壁附近的颗粒温度迅速下降，而远离热交换壁的颗粒温度几乎不变。热变化过程可分为高速阶段，快速阶段和慢速阶段。固相的平均传热贡献率为92.79％，高于气相。颗粒之间的接触热传导在颗粒层的任何位置都是主要的。在传热过程开始时发现了非常规的传热方向分布。阐明了煅烧石油焦和换热管的详细传热机理。 （C）2018 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Energy》 |2018年第15期|56-65|共10页
  • 作者

    Zheng Bin; Sun Peng; Liu Yongqi; Zhao Qiang;

  • 作者单位

    Shandong Univ Technol, Sch Transportat & Vehicle Engn, 266 Xincun West Rd, Zibo 255049, Shandong, Peoples R China;

    Shandong Univ Technol, Sch Transportat & Vehicle Engn, 266 Xincun West Rd, Zibo 255049, Shandong, Peoples R China;

    Shandong Univ Technol, Sch Transportat & Vehicle Engn, 266 Xincun West Rd, Zibo 255049, Shandong, Peoples R China;

    Shandong Univ Technol, Sch Transportat & Vehicle Engn, 266 Xincun West Rd, Zibo 255049, Shandong, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Heat transfer; Calcined petroleum coke; Heat exchange tube; Waste heat recovery;

    机译：传热煅烧石油焦换热管余热回收;

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