Reducing pressure drop of coalescence filtration media by patterned modification of wettability

M. Wittmar*, W. Mölter-Siemens, K. Varzandeh, C. Asbach, Institute for Energy and Environmental Technology e.V. (IUTA); L. Tsarkova, T. Bahners, B. Gerbert, DTNW - Deutsches Textilforschungszentrum Nord-West gGmbH, Germany

Coalescence filtration is a widely used technique in industry to remove oil from compressed air and to achieve suitable air qualities for production processes in order to protect devices and the workforce. Typical filters are constructed of nonwoven fibers and represent a heterogeneous media with complex permeability and capillary properties, which are defined by the fiber sizes and media density, surface tensions, oil viscosity, and droplet dimensions. One of the important parameters among the filter efficiency parameters is the saturation of the filter medium. The resulting pressure drop increases significantly the energy costs of the process. According to the channel-jump model the formation of an oil film in the filter media has a major influence on the pressure drop. In case of an oleophilic filter medium, the oil film is formed on the downstream side of the filter and is directly coupled to the drainage efficiency. The presented work aims at reducing the pressure drop and directing the oil drainage by introducing...

Session: G4 - Mist and Droplet Separation
Day: 22 October 2019
Time: 16:45 - 18:00 h

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