Experimental investigation of pressure drop in structured packings
Experimental investigation of pressure drop in structured packings
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DOI：
10.1016/j.ces.2012.01.025
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发表时间：
2012-05
影响因子：
4.7
通讯作者：
A. Zakeri;A. Einbu;H. Svendsen
中科院分区：
文献类型：
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作者：
A. Zakeri;A. Einbu;H. Svendsen
已经进行了多项研究来测量填料塔中的压降，然而，大多数研究都集中在蒸馏和散堆填料上，并且获得的相关性可能无法直接适用于反应吸收。本文是对 3 种不同规整填料压降研究的结果；展示了苏尔寿的 Mellapak 2X、Koch-Glitsch Flexipac 2Y HC 和 Montz-Pak B1-250M。测试的流体系统是：空气/水、液体粘度为2.5至12cP的空气/糖水溶液，最后是空气/30wt% MEA。所用柱的填充高度为5m，内径为0.5m。填料高度上的压降是作为气体和液体流速的函数而获得的，既作为总压降又作为沿填料的压力变化。发现粘度对压降和泛点有轻微影响。将实验结果与使用各个供应商为其自己的包装提供的软件包进行的估计进行比较。估计结果与实验结果之间的比较表明，所选软件通常可以可靠地预测 F 因子约为 3Pa0.5 的压降，但即使在高液体负载下，即使 F 因子较低，也可能会出现偏差。对于低液体负载（<10m3/m2h），软件估计在整个测量范围内都很好（F 系数<4.5–5Pa0.5）。对于所有液体负载的反应系统，Flexipac 2Y HC 和 B1-250M 几乎没有任何变化。对于 Mellapak 2X，反应系统的影响对于高液体负载而言非常重要。
Several studies have been performed to measure pressure drop in packed towers, however, most of them have focused on distillation and random packings and the correlations obtained may not be directly applicable to reactive absorption. In this paper, results from a study of pressure drop in 3 different structured packings; Mellapak 2X from Sulzer, Koch-Glitsch Flexipac 2Y HC, and Montz-Pak B1-250M, are presented. The fluid systems tested were: air/water, air/ aqueous sugar solutions with liquid viscosities from 2.5 to 12cP and finally air/30wt% MEA. The column used had a 5m packing height with an inner diameter of 0.5m. Pressure drop across the packing height was obtained as function of gas and liquid flow rate both as total pressure drop and as pressure change along the packing. A slight influence of viscosity on pressure drop and flooding point was found. The experimental results were compared with estimates made using the software packages provided by the various suppliers for their own packings. Comparisons between estimated and experimental results showed that the selected software in general gives reliable predictions of pressure drop up to an F-factor of about 3Pa0.5, but that deviations may occur even for lower F-factors at high liquid loads. For low liquid loads (<10m3/m2h) the software estimations are good in the whole range of measurements (F-factor <4.5–5Pa0.5). For reactive systems at all liquid loads there is hardly any change at all for the Flexipac 2Y HC and B1-250M. For the Mellapak 2X the effect of the reactive system is significant for high liquid loads.