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Structure Effect on Heating Performance of Microwave Inductive Waste Lubricating Oil Pyrolysis

机译：微波电感废料润滑油热解的结构影响

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摘要

Microwave has been widely used in pyrolysis of waste lubricating oil, but the uneven electromagnetic field distribution seriously affects the product distribution and even aggravates coking in pyrolysis process, where the pyrolizer structure plays a dominant role. Four structures were simulated in the continuous pyrolysis of waste lubricating oil under microwave irradiation, including single circular tube, parallel tubes, pulse type spherical tube as well as circular tube equipped with baffles. The temperature distribution and pressure drop were calculated to evaluate the performance of heat transfer and flow behavior. The simulation indicates that there exists several "hot spots" in continuous circular structure due to the maldistribution of electromagnetic field, which may cause coke in industry. The baffles can enhance the turbulence of oil flow in the reactor but cause several stagnant zones, which hinder local liquid renewal. The parallel tube-type pyrolizer shows highly efficient heating performance but large temperature difference among each tube as well as large pressure drop due to the decrease of effective flow area for high viscous oil. Among those structures, the spherical tube can accelerate the renewal process of liquid and thus make the temperature more uniform, which is a durable and available strategy for microwave-inductive pyrolysis.
机译：微波已广泛用于废物润滑油的热解，但电磁场分布不均匀地影响产物分布，甚至加剧了热解过程中的焦化，烧烤器结构起到了显着作用。在微波辐射下的废润滑油的连续热解中模拟了四种结构，包括单圆管，平行管，脉冲型球形管以及配备挡板的圆管。计算温度分布和压降以评估传热和流动行为的性能。该模拟表明，由于电磁场的恶性，在连续圆形结构中存在多个“热点”，这可能导致工业中的焦炭。挡板可以增强反应器中的油流动的湍流，但导致几个停滞不短的区域，其阻碍局部液体更新。平行管式烧烤器显示出高效的加热性能，但由于高粘度油的有效流动面积的降低，每个管中的温度差异很大。在这些结构中，球形管可以加速液体的更新过程，从而使温度更均匀，这是微波感应热解的耐用和可获得的策略。

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  • 来源
    《Heat Transfer Engineering》 |2021年第18期|1381-1389|共9页
  • 作者

    Zhenyu Zhao; Xinhui Tang; Borui Jiang; Hong Li; Xingang Li; Xin Gao;

  • 作者单位

    School of Chemical Engineering and Technology National Engineering Research Center of Distillation Technology Collaborative Innovation Center of Chemical Science and Engineering Tianjin University Tianjin China;

    School of Chemical Engineering and Technology National Engineering Research Center of Distillation Technology Collaborative Innovation Center of Chemical Science and Engineering Tianjin University Tianjin China;

    School of Chemical Engineering and Technology National Engineering Research Center of Distillation Technology Collaborative Innovation Center of Chemical Science and Engineering Tianjin University Tianjin China;

    School of Chemical Engineering and Technology National Engineering Research Center of Distillation Technology Collaborative Innovation Center of Chemical Science and Engineering Tianjin University Tianjin China;

    School of Chemical Engineering and Technology National Engineering Research Center of Distillation Technology Collaborative Innovation Center of Chemical Science and Engineering Tianjin University Tianjin China;

    School of Chemical Engineering and Technology National Engineering Research Center of Distillation Technology Collaborative Innovation Center of Chemical Science and Engineering Tianjin University Tianjin China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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