Abstract: Hydrodynamic behavior of flow-guided sieve plate (a Linde type sieve plate) has been studied. Studies were carried out using air and water in a rectangular column. To obtain information on the effects of surface tension and specific gravity of liquid on plate hydraulics, surfactants were added to alter the surface tension of water and saturated aqueous solution of common salt was used instead of water for some experiments. The experimental results about dry plate pressure drop, pressure drop caused by vapor through liquid and formation of bubbles, entrainment and weeping point are reported in detail and correlation equations and graphes for design purposes are presented. Application of the results to commercial column design has been verified by checking with plant data. Based on adequate experimental work the aeration factor β against calculated clear-liquid depth hL with hole F factor as parameter was plotted. It must be emphasized that appreciable error may be resulted if the β plot based on air-water system is applied to those systems with low interfacial tension. Thus, a correction formula for aeration factor β is specially proposed as. This formula may be used for conventional sieve plate and other type plates as well. After examining various reports about weeping point it has been found that the bases used by different authors are quite different. Considering the combined effects of the action of weeping on plate efficiency and the dependence of weeping rate on vapor velocity, it is concluded that choosing a relative weeping rate q=10% as weeping point may be suitable. Experimental results on clear-liquid height and froth height and corresponding correlation equations are also reported.

摘要： 对导向筛板的流体力学性能进行了实验研究,实验是以空气和水为介质,在矩形塔中进行的。为了研究表面张力和液体重度对塔板流体力学性能的影响,在部分实验中加入了表面活性剂,而在另一部分实验中以饱和食盐水代替清水。 文中详细报导了导向筛板的干板压降,液层压降,雾沫夹带以及漏液点的实验结果,并提出了可供设计应用的关联式及各种图表。由于在工业设计和生产核算中获得了满意的结果,其可靠性得到了验证。 在广泛的实验基础上标绘了导向筛板的充气系数β对于孔动能因子F_o和计算清液深度h_L的关联图。 必须强调指出,基于空气-水系统的β图在用于低表面张力系统的计算时将会产生显著误差。为此,特别提出了对充气系数β的校正式:该式亦可用于普通筛板及其它类型塔板。 鉴于各种有关报导中所取漏液点的基准不一,本文根据漏液对效率的影响和漏液量随气速而变化的规律综合考虑,认为确定相对漏液量q=10%为漏液点是适宜的。 文中还报导了清液高度和泡沫高度的实验结果和关联式。