锯齿边窄条阀塔板流体力学和传质性能实验研究

详细分析了锯齿边窄条阀的锯齿边对传质性能的影响和锯齿边窄条阀的结构特点。在1000 mm×350 mm规格的实验塔中,以典型的水-空气冷模实验系统,对锯齿边窄条阀STV75塔盘和F1圆形浮阀塔盘进行了对比实验,测定了多种气液负荷下的压降、雾沫夹带、泄漏量等流体力学性能。利用氧解吸法,测定了塔板传质效率。实验结果和工业应用表明,在相同条件下,锯齿边窄条浮阀塔板比F1圆形浮阀塔板的板效率提高10%—20%、板压降降低100 Pa以上,雾沫夹带与泄漏与F1阀相当,是一种综合性能优良的新型浮阀。

Experimental research of hydraulic properties and mass transfer of tooth-like narrow strip valves

The effect of tooth-like edge on mass transfer and structural characteristics of tooth-like narrow strip valves were presented.The compared experiments of tooth-like narrow strip valve STV75 with F1 type valve were performed in an experimental rectangular column of 1000 mm×350 mm by employing a typical model experimental system of water-air.From the experiment,many hydraulic properties,such as tray pressure drop,entrainment rate,weeping rate and tray efficiency, were measured and mass transfer efficiency was determined through the method of oxygen-absorptions.Both of the results of the experiments and the application in industry demonstrate that under the same condition,compared with those of the tray equipped with F1 type valves,the tray efficiency of the tray equipped with tooth-like narrow strip valve is improved by 10%-20%,and its pressure drop is lowered by over 100 Pa.The entrainment rate and weeping rate of STV75 tray are almost equivalent to those of F1 type tray.Consequently,the tooth-like narrow strip valve is proven to be a better valve in terms of comprehensive technology.