High-efficiency coalescence filters for separation of emulsified water from diesel fuel

A. Krasinski*, A. Kozdron, Warsaw University of Technology, Poland

The coalescence filters are widely used in processes where very fine droplets needs to be efficiently separated from another liquid (continuous phase). For successful operation a number of parameters has to be taken into account, e.g. the geometry of porous structure, its surface properties (e.g. specific surface area, wettability). An optimum superficial velocity depends on properties of liquids and droplets concentration. Selection of this parameter is very important as it strongly affects the separation performance.

This work is focused on the design and experimental verification of the performance of melt-blown coalescence media made of polyester (PBT) applied for the removal of dispersed water from diesel fuel, including the effect of solid particles on the efficiency of water separation. The experiments comprise water removal from solid-free fuel as well as from diesel contaminated with particles. Two grades of solids with different properties were used to examine their impact on the coalescence performance of polymer media. The geometry of filters was cylindrical with an out-to-in flow arrangements as in recently patented novel design of diesel filter, and consisted of two essential layers: (i) inlet coalescence layer of various grammages, and (ii) outlet drainage layer.

The presented results show a strong dependence of the coalescence filters performance on the structure of the fibrous media, water inlet concentration, flow rate as well as particle type, when testing filters with solid contaminants in the liquids.
The results for pure water-diesel system confirm ...

Session: L16 - Fuel Filtration I - Water Separation
Day: 13 October 2016
Time: 10:45 - 12:00 h

Learn more at FILTECH 2018 - Register Now!