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Impact of incinerator internal hydrodynamics on hazardous organic waste destruction efficiency

机译：焚烧炉内部流体动力学对有害有机废物破坏效率的影响

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摘要

The results of a study concerning the influence of internal hydrodynamics of incinerators on the principal organic hazardous constituents (POHCs) destruction efficiency are presented in this paper. A model of two tanks-in-series is used to describe internal hydrodynamics of incinerators via residence time distributions (RTD). Two cases corresponding, respectively, to the presence of a short-circuit and a deadwater zone within the internal flow are examined in detail. The results indicate that the incinerability ranking, based on plug--flow laboratory experiments for thermal stability determination, is disrupted. Temperatures required to obtain a conversion rate of 99.99/100 in a perturbed fiow are higher. Simple relationships allow calculation of the temperature requirement deviation from the plug-flow case knowing the kinetic parameters of the waste combustion and the characteristics of the reactor hydrodynamics. This study shows that the selection of compounds to be spiked in the waste feed of an incinerator during a trial burn should be coupled to a direct determination of the residence time distribution of the incinerator itself for a proper selection of the compound that is more difficult to burn than any other or`tganic expected in the actual waste. Methane, chlorobenzene and methyl chloride, which are characterized by a high stability whatever the species residence time distribution in the incinerator, are good candidates for trial bums.
机译：本文介绍了有关焚烧炉内部流体动力学对主要有机有害成分（POHCs）破坏效率的影响的研究结果。两个串联的储罐模型用于通过停留时间分布（RTD）描述焚化炉的内部流体动力学。详细研究了两种情况，分别对应于内部流中存在短路和死水区域。结果表明，基于活塞流实验室实验确定热稳定性的焚化等级被打乱了。在扰动的流中获得99.99 / 100的转换率所需的温度更高。通过简单的关系，可以在知道废料燃烧的动力学参数和反应堆流体动力学特性的情况下，计算与活塞流情况不同的温度要求。这项研究表明，在试烧期间，选择要添加到焚化炉废料中的化合物应与直接确定焚化炉本身的停留时间分布相结合，以便正确选择较难于处理的化合物。比实际浪费中预期的任何其他有机物燃烧。甲烷，氯苯和氯甲烷无论在焚烧炉中的停留时间分布如何，均具有很高的稳定性，是试验烧伤的良好选择。

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