孔径梯度分布对亲油型滤材气液过滤性能的影响

发布时间：2018-03-22 12:33

本文选题：纤维滤材　切入点：过滤　出处：《化工学报》2017年04期 　论文类型：期刊论文

【摘要】：在天然气净化、大型旋转机械曲轴箱通风和压缩空气过滤等领域,气液聚结过滤器具有广泛的应用。利用滤材过滤性能实验装置,分析了气液过滤过程中不同孔径梯度分布的亲油型滤材的压降、穿透率和饱和度变化,比较了其过滤性能、内部液体分布特性以及对液滴二次夹带现象的影响。结果表明:在气液过滤过程"通道压降"阶段,孔径递增滤材压降和0.8μm以上液滴穿透率的变化曲线具有明显的分层特征。不同孔径梯度分布滤材的稳态过滤性能存在明显差异,主要原因是滤材内部存在液体运移通道的传递现象。通过与孔径递减和孔径均匀分布滤材的稳态过滤性能对比,发现孔径递增滤材在保证较低压降的同时具有最高的品质因子,有利于减少液滴二次夹带现象的发生,且对0.8μm以上不同粒径液滴均具有最高的过滤效率,即孔径递增滤材在气液聚结过滤器设计中更具优势。
[Abstract]:The gas-liquid coalescence filter is widely used in the fields of natural gas purification, ventilation of large rotating machinery crankcase and compressed air filtration. The pressure drop, penetration rate and saturation of oil-lipophilic filter materials with different pore size gradient distribution were analyzed, and the filtration performance was compared. The characteristics of internal liquid distribution and its influence on the secondary entrainment of liquid droplets. The results show that in the "channel pressure drop" stage of gas-liquid filtration, The curves of pressure drop and liquid drop penetration over 0.8 渭 m have obvious delamination characteristics. The steady-state filtration performance of different pore size gradient distribution is obviously different. The main reason is that the liquid migration channel exists in the filter material. By comparing with the steady state filtration performance of the filter material with decreasing pore diameter and uniform distribution of pore diameter, it is found that the increasing pore diameter filter material has the highest quality factor while ensuring the lower pressure drop. It is beneficial to reduce the occurrence of secondary entrainment of droplets, and has the highest filtration efficiency for droplets with different diameters over 0.8 渭 m, that is, the incremental pore size filter has more advantages in the design of gas-liquid coalescence filters.
【作者单位】：中国石油大学(北京)机械与储运工程学院过程流体过滤与分离技术北京市重点实验室;
【基金】：国家自然科学基金项目(51376196)~~
【分类号】：TQ051.85

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