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Microexplosion and ignition of droplets of fuel oil/bio-oil (derived from lauan wood) blends

机译：燃油/生物油（来自la木）混合物液滴的微爆炸和着火

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摘要

Vaporization, microexplosion and ignition characteristics of a single droplet of pyrolysis bio-oil/fuel oil blends were examined using a suspended-droplet heating device. The bio-oil used in the experiment was produced from the fast pyrolysis process of lauan (shorea) wood, which is of low heating value, and high water as well as oxygen contents. The heating temperature (ambient temperature) and the mixing ratio of bio-oil/fuel oil blends were varied in the experiment. Two kinds of fuel oil were adopted, i.e., diesel and heavy fuel oil (HFO). The droplet evaporation, microexplosion and ignition behaviors were recorded by a high-speed video system. Meanwhile, the temperature histories (droplet and ambient temperatures) were measured by two K-type thermocouples in the heating process. For pure bio-oil, it was found that at the lower ambient temperature, 300 ℃, random behavior (including expansion, bubbling, ejecting, and swelling) and microexplosion could be observed but ignition did not occur. However, at the higher ambient temperature, 500℃, random behavior, microexplosion and ignition occurred for pure bio-oil and also for all cases of bio-oil/diesel blends. Random behavior and microexplosion occurred because the bio-oil contained many chemical compositions with various boiling points and water. For the bio-oil/HFO blends, ignition did not occur for low bio-oil contents (smaller than 50%) in the blends. However, when the bio-oil content was equal to or greater than 60%, ignition could occur but bio-oil/ HFO-blends droplets took longer to finish burning compared with the bio-oil/diesel droplets.
机译：使用悬浮液滴加热装置检查了单滴热解生物油/燃料油混合物的汽化，微爆炸和着火特性。实验中使用的生物油是通过低热值，高水含量和高氧含量的la（（木）木材的快速热解过程产生的。实验中改变了加热温度（环境温度）和生物油/燃料油混合物的混合比。采用两种燃料油，即柴油和重燃料油（HFO）。高速视频系统记录了液滴的蒸发，微爆炸和着火行为。同时，在加热过程中通过两个K型热电偶测量温度历史记录（液滴和环境温度）。对于纯生物油，发现在较低的环境温度（300℃）下，可以观察到随机行为（包括膨胀，起泡，喷射和溶胀）和微爆炸，但未发生起火。但是，在较高的环境温度（500℃）下，纯生物油以及所有生物油/柴油混合物的情况都发生随机行为，微爆炸和着火。发生随机行为和发生微爆炸是因为生物油包含许多沸点和水均不同的化学成分。对于生物油/ HFO混合物，混合物中的生物油含量低（小于50％）时，不会发生着火。但是，当生物油含量等于或大于60％时，可能会发生燃烧，但与生物油/柴油液滴相比，生物油/ HFO混合液滴要花费更长的时间才能完成燃烧。

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  • 来源
    《Fuel》 |2013年第11期|31-42|共12页
  • 作者

    Shuhn-Shyurng Hou; Fakhrur M. Rizal; Ta-Hui Lin; Tzu-Yueh Yang; Hou-Peng Wan;

  • 作者单位

    Department of Mechanical Engineering, Kun Shan University, Tainan 71003, Taiwan, ROC;

    Department of Mechanical Engineering, National Cheng Kung University, Tainan 70101, Taiwan, ROC;

    Department of Mechanical Engineering, National Cheng Kung University, Tainan 70101, Taiwan, ROC Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan 70101,Taiwan, ROC;

    Green Energy and Environment Research Laboratories, New Energy Technology Division, Industrial Technology Research Institute, Hsinchu 31040, Taiwan, ROC;

    Green Energy and Environment Research Laboratories, New Energy Technology Division, Industrial Technology Research Institute, Hsinchu 31040, Taiwan, ROC;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Microexplosion; Droplet vaporization; Pyrolysis bio-oil; Mixed fuel; Ignition;

    机译：微爆炸液滴汽化;热解生物油;混合燃料;点火;

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