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首页> 外文期刊>Renewable & Sustainable Energy Reviews >Overview of methods to control the liquid distribution in distillation columns with structured packing: Improving separation efficiency
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Overview of methods to control the liquid distribution in distillation columns with structured packing: Improving separation efficiency

机译：用结构包装控制蒸馏塔液体分布的方法概述：提高分离效率

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The paper presents experimental results on the effect of characteristics of liquid spreading over the surface of a structured packing, distribution of local flow parameters over the cross-section and height of the distillation column under various conditions of initial packing irrigation. It is shown that the corrugation angle of the structured packing sheets, microtexture parameters, presence of perforation and size of holes, as well as liquid flow rate determine the patterns of liquid spreading and wetting of the packing surface. The test results for a new method of dynamic control of the liquid distributor with independent valves for each drip point are presented with the aim of influencing large-scale flow maldistribution in the column and increasing the separation efficiency. The data obtained in these experiments showed that a targeted change in the position of active irrigation points based on the actual distribution of local parameters in the separation column can lead to a noticeable increase in the efficiency of mixture separation up to 20% compared to a regular distributor with a fixed position of drip points. The effect of variation of the turn angles of the structured packing layers (20 degrees, 45 degrees, 70 degrees, and 90 degrees) on the efficiency of mixture separation was studied. Using a passive method to decrease the nonuniformity of distribution of local flow parameters by increasing the rotation angle of the structured packing layers in the column also leads to an increase in the separation efficiency. For the rotation angles of the packing layers (70-90) degrees, the HETP decreased in comparison with the rotation angle of 20 degrees by (10-12) %.
机译：本文提出了实验结果对结构化填料表面的液体扩散的特性，在初始包装灌溉的各种条件下在蒸馏塔的横截面和高度上分布局部流量参数的效果。结果表明，结构化包装片的波纹角，微卷尺参数，穿孔的存在和孔的尺寸，以及液体流速决定了填充表面的液体扩散和润湿模式。通过对每个滴点的独立阀门的液体分配器的新动态控制方法的测试结果，目的是影响柱中的大规模流动分布并增加分离效率。在这些实验中获得的数据表明，基于分离柱中局部参数的实际分布的有源灌溉点的位置的目标变化可导致混合物分离效率的显着增加，其与常规相比高达20％分销商具有固定位置的滴点。研究了结构填料层（20度，45度，70度和90度）对混合分离效率的旋转角度的变化。使用被动方法通过增加柱中结构填充层的旋转角度来降低局部流动参数的不均匀性也导致分离效率的增加。对于填充层的旋转角度（70-90）度，HETP与20度的旋转角度（10-12）％相比减小。

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