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The relationship between pressure drop and liquid saturation in oil-mist filters - Predicting filter saturation using a capillary based model

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Open access
Authors
Mead-Hunter, Ryan
Braddock, Roger
Kampa, D
Merkel, Nini
Kasper, Gerhard
Mullins, Benjamin
Date
2012
Type
Journal Article

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Mead-Hunter, Ryan and Braddock, Roger D. and Kampa, Daniel and Merkel, Nini and Kasper, Gerhard and Mullins, Benjamin J. 2013. The relationship between pressure drop and liquid saturation in oil-mist filters - Predicting filter saturation using a capillary based model. Separation and Purification Technology. 104: pp. 121-129.
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Separation and Purification Technology
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NOTICE: this is the author’s version of a work that was accepted for publication in Separation and Purification Technology. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Separation and Purification Technology, Volume 104, February 2013, Pages 121-129, http://dx.doi.org/10.1016/j.seppur.2012.11

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Abstract

This work details the results of a study into the relationship between pressure drop and liquid saturation in mist (or coalescing) filters. Liquid saturation (clogging) in mist filters is of critical importance as it is directly related to filter efficiency and flow resistance. Experiments were conducted to determine steady-state saturation and pressure drop values in commonly used oleophillic fibrous filter media, using a range of different combinations of face velocity and number of layers of media within the filter element. Several empirical relationships for saturation and pressure drop were derived based on the relationships found. In addition, a capillary-based saturation model has been described and fitted to the experimental data. A good agreement between the model and data was obtained when an empirically fitted term was added. Equations were developed which allow such variables to be determined from known parameters.