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首页> 外文期刊>Heat Transfer Engineering >Considering In-Tube Crude Oil Boiling in Assessing Performance of Preheat Trains Subject to Fouling
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Considering In-Tube Crude Oil Boiling in Assessing Performance of Preheat Trains Subject to Fouling

机译：在评估结垢的预热列车性能时考虑管内原油沸腾

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摘要

Oil refinery preheat trains can exhibit unwanted two-phase flow behavior. An example is boiling of crude oil inside heat exchangers, when the local pressure is not high enough to keep crude in a liquid state. This often arises when the pump is undersized. Understanding the two-phase behavior and assessing the boiling heat transfer coefficients would result in a better prediction and estimation of exchanger fouling. Where single-phase modeling is used under boiling conditions, the anomalous behavior leads to unrealistic estimates of fouling resistance, and can severely underpredict the increased pressure drop and consequent loss of crude throughput. There is little public information on fouling in two-phase flows as laboratory experiments are very costly, despite the importance of this in refinery heat exchangers and furnaces. Indeed, the importance of crude boiling is likely to increase as lighter crudes such as shale oils are processed. These lighter crudes are often blended with heavier crudes to maintain an appropriate refining average density. This paper consists of two sections. The first section uses industrial monitoring data to illustrate fouling behavior for a heat exchanger that undergo both boiling and fouling. The second section discusses simulations to evaluate thermohydraulic behavior when the crude undergoes boiling. The analysis requires coupled heat transfer, and hydraulic and surface fouling aspects; a commercial preheat train network simulator, SmartPM, was used for this study.
机译：炼油厂的预热机组可能会表现出有害的两相流动行为。一个例子是当局部压力不足以使原油保持液态时，热交换器内部的原油沸腾。当泵尺寸过小时，通常会出现这种情况。了解两相行为并评估沸腾传热系数，可以更好地预测和估计交换器结垢。在沸腾条件下使用单相建模的情况下，异常行为会导致对结垢阻力的不切实际估计，并且可能严重低估了压降的增加和原油产量的损失。尽管在精炼换热器和熔炉中这很重要，但是由于实验室实验的成本很高，因此几乎没有关于两相流结垢的公共信息。实际上，随着诸如页岩油等较轻原油的加工，原油沸腾的重要性可能会增加。通常将这些较轻的原油与较重的原油混合，以维持适当的炼油平均密度。本文分为两个部分。第一部分使用工业监测数据来说明经历沸腾和结垢的热交换器的结垢行为。第二部分讨论模拟，以评估原油沸腾时的热工行为。分析需要耦合传热，以及水力和表面污染方面。这项研究使用了商用预热列车网络模拟器SmartPM。

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  • 来源
    《Heat Transfer Engineering》 |2015年第8期|632-641|共10页
  • 作者

    EDWARD M. ISHIYAMA; SIMON J. PUGH;

  • 作者单位

    IHS Downstream Research, 133 Houndsditch, EC3A 7BX London, UK,Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, United Kingdom;

    IHS Downstream Research, London, United Kingdom;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
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