新型导向筛板-浮阀复合塔板的流体力学性能研究

在内径为 Φ600 mm 的有机玻璃塔内，以空气-水为物系，对一种新型复合塔板——导向筛板-浮阀复合塔板进行了冷膜实验，对开孔率基本相近、浮阀个数不同的复合塔板的流体力学性能进行了测试，测定了不同条件下塔板压降、雾沫夹带、漏液等流体力学参数，研究了在开孔率相近的情况下，浮阀个数不同对复合塔板性能的影响。根据实验结果，回归得到了导向筛板-浮阀塔板的干板压降的计算公式 ΔP_d = au₀² + b 和湿板压降的计算公式 ΔP_T = aF₀^bL_W^c，并分析了雾沫夹带和漏液量随筛孔气速和液流强度的变化关系，获得了新型导向筛板-浮阀塔板的设计参数和依据。

A new flow guided sieve-floating valve tray and its hydromechanics

A cold-flow model test of a new compound tray which consisted of a flow guided sieve and a floating valve tray has been conducted in a Φ600 mm Perspex column for an air-water system.Hydrodynamic parameters such as tray pressure drop,entrainment and weeping were measured under different conditions.The effect of varying the floating valve numbers on the performance of the compound tray was investigated for similar fractional hole areas.On the basis of the results,correlations of the dry plate(Δpd =au20+b) and wet plate pressure drop(ΔpT=aFb0LcW) of the compound tray were obtained and the relationships between the change of entrainment and weeping rate with sieve pit gas velocity and liquid flow rate were analyzed.In addition,design parameters and the underlying principles of the flow guided sieve-floating valve tray apparatus were derived.