Efficiency in mechanical fibrous filters loading with liquid aerosols

M. Dalemo*, Absolent AB, Sweden

The design of a filter is always a compromise between high separation efficiency, low pressure drop, long changing intervals, high air flow capacity and low cost. A large number of studies deal with the efficiency and pressure drop from new dry fibrous filters. Moreover, several studies are also looking at the clogging process of liquid aerosols but only related to plain filter media. However, articles dealing with the liquid aerosols clogging process of full scale pleated fibrous filters can almost only be found for hepa filters. The present study compares the difference in pressure drop build up and separation efficiency, in pleated filter cassettes, when using high drainage media and high efficiency microfiber media respectively.

The aim was to examine how the efficiency changes, while the filter is being loaded with oil and how that depends on the accumulation of oil in the material and also the influence of fibre diameter and air flow. The overall objective was to find out how the separation efficiency can be optimised in an oil mist filter unit using glass fibre fibrous filter media...

Session: G1 - Mist and Droplet Separation I
Day: 13 March 2018
Time: 13:00 - 14:15 h

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