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首页> 外文会议>International Chemical Recovery Conference v.1; 20040606-20040610; Charleston,SC; US >Shape Characteristics of Non-Spherical Black Liquor Droplets
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Shape Characteristics of Non-Spherical Black Liquor Droplets

机译：非球形黑液液滴的形状特征

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摘要

The size and shape of droplets sprayed into the furnace of a recovery boiler have a paramount effect on the combustion and flight-path characteristics of black liquor droplets. This study presents a method to analyze black liquor particle shapes and experimental data obtained with industrial scale splashplate nozzles. A large number of particle shape characteristics were studied and a few were chosen for detailed study. From the view point of heat and mass transfer connected to drying and combustion, the most relevant droplet characteristic is the ratio of volume and surface. Sauter mean diameter is the most important property of the overall spray in this context. Depending on the spraying practice the Sauter mean diameter was between 3.6 mm and 7.7 mm. From the view point of droplet trajectory the aspect ratio and sphericity were found to be the most important factors. The average value of aspect ratio in nine test cases varied between 3.3 and 4.0. Average sphericity was almost constant, from 0.85 to 0.89.
机译：喷入回收锅炉炉内的液滴的大小和形状对黑液液滴的燃烧和飞行路径特性具有至关重要的影响。这项研究提出了一种分析黑液颗粒形状的方法和使用工业规模飞溅板喷嘴获得的实验数据的方法。研究了大量的颗粒形状特征，并选择了一些进行详细研究。从与干燥和燃烧相关的传热和传质的角度来看，最相关的液滴特性是体积与表面积之比。在这种情况下，Sauter平均直径是整个喷雾的最重要属性。根据喷涂方式，Sauter的平均直径在3.6毫米至7.7毫米之间。从液滴的轨迹来看，长宽比和球形度是最重要的因素。 9个测试用例的宽高比平均值在3.3到4.0之间变化。平均球形度几乎恒定，从0.85到0.89。

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