Recent advances in the understanding of fibrous filter behaviour under solid particle load
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Cited by (40)
Influence of pre-stage filter selection and face velocity on the loading characteristics of a two-stage filtration system
2019, Separation and Purification TechnologyCitation Excerpt :Furthermore, pre-filters are typically inexpensive and easy to install [6–9]. Therefore, in order to reduce particles loading on the high efficiency filter, extend their service lifetime and reduce the cost of replacing them, two-stage filtration systems which consist of a pre-filter on the pre-stage to remove large particles and a more efficient main-filter on the main-stage to capture finer particles below 1 µm have been designed and widely used in modern filtration systems [10–15]. It was found that many factors could influence the loading performance of filter, such as the filter types, the distribution of particles, filtration face velocity and so on [12,16–21].
Particle loading characteristics of a two-stage filtration system
2019, Separation and Purification TechnologyFiltration of Solid Aerosols
2017, Aerosol FiltrationThe effect of a drainage layer on filtration performance of coalescing filters
2016, Separation and Purification TechnologyCitation Excerpt :However, when a filter is clogged with aerosol particles, its filtration behavior will change significantly. A number of works have been conducted to investigate gas-solid filtration [5–7]. In the case of gas-liquid filtration, especially for the coalescence filtration, the filtration mechanism requires further investigation, because the droplets migration process in the filter material is very complex and is affected by a variety of parameters.
Pressure drop and liquid transport through coalescence filter media used for oil mist filtration
2014, International Journal of Multiphase FlowCitation Excerpt :As long as a filter is dry, this knowledge can be used to estimate its pressure drop and efficiency of aerosol deposition, regardless of whether the arriving particles are solid or liquid. However, once aerosol has accumulated to an appreciable degree, a filter will behave very differently with respect to the two types of aerosol: While solid “dust” remains on the fibers (e.g. Kasper et al., 2009, 2010) until the filter clogs and forms a cake (Walsh, 1996), liquid accumulating in a coalescence filter does not stay where it is first deposited due to forces such as gravity of friction from the air flow. These subsequent processes of liquid redistribution and transport inside the media are complex and still poorly understood, in some regards not even qualitatively, because they depend on numerous parameters such as media structure, fiber wettability and capillary effects, fluid viscosity, as well as the interaction of the coalesced liquid with the air flow.