气液聚结滤材液体通道饱和度及压降实验

Experimental on liquid passage saturation and pressure drop of gas-liquid coalescing filter material

聚结滤材内部液体通道特性直接影响天然气净化用聚结滤芯的过滤性能。利用滤材实验装置对两种工业用疏油滤材通道饱和度及压降进行测试,在过滤气速0.1~0.7 m/s和液体动力黏度46~320 mPa·s范围内,探究液体动力黏度及过滤气速对聚结滤材内部液体通道特性的综合影响。结果表明,在相同液体动力黏度条件下,随过滤气速的升高,滤材通道区域的饱和度及通道压降均指数降低;在相同过滤气速条件下,滤材通道区域的饱和度及通道压降均随液体黏度增高呈线性增长规律。基于上述规律,建立了液体通道特性预测模型,可用于定量表征液体通道特性与滤材结构、液体黏度、过滤速度等参数之间的相互作用关系。(图8,表5,参23)

The liquid channel characteristics of coalescing filter material directly affect the filtration performance of coalescing filter elements for natural gas purification.Herein,the channel saturation and pressure drop of two kinds of industrial oleophobic filter materials were tested by a filter material experimental device.Then,an investigation was conducted within the filtration gas velocity of 0.1‒0.7 m/s and the dynamic liquid viscosity of 46‒320 mPa·s to explore their comprehensive influence on the characteristics of liquid channel inside the coalescing filter material.The results show that the channel saturation and pressure drop inside the coalescing filter material decrease exponentially with the increase of the filtration gas velocity under the same dynamic liquid viscosity,and increase linearly with the increase of liquid viscosity under the same filtration gas velocity.Based on these rules,a prediction model of liquid channel characteristics was established,and the relevant results could be used to quantitatively characterize the interaction between liquid channel characteristics and the parameters,such as the filter material structure,liquid viscosity and filtration velocity.