Filter Loading Characteristics of Liquid-coated Particles

摘要

Particles in real worlds are commonly coated with liquids. It is due to their interaction with environments or generation processes. There are a variety of areas where filters may become loaded with liquid-coated aerosols such as filters near metalworking fluid (MWF) operation, coalescing filters in chemical process, engine crankcase filters, and related fields. Many researches have been focused on the loading performance of filters when challenged with either liquid or solid particles. To these authors' knowledge, there is no study on filters when they are loaded with liquid-coated particles. However, field/application engineers often experience the significant reduction of filter lifetime when oily particles are collected. Further, the stickiness of oily particles significantly reduces the efficiency of self-cleaning filtration systems. The objective of this study is to understand the filter performance under the liquid-coated particle loading. In this study, the behavior of different filter media under liquid-coated particles is studied. Experimental results demonstrate that, on the pressure-drop vs. loaded-mass curves, there exists a transition from pure solid particles loading to pure liquid particle loading while test particle sizes remains the same. A data reduction process is then proposed to gain insides of the loading process.