The ‘Becoil’ Demisting Unit is a high efficiency, low pressure loss device for removing liquid particles in excess of 5 microns. To further the collection efficiency below 5 microns, the ‘Becone’ Coalescer was developed.
The coalescer unit is a pad fabricated from a co-knitted composite fabric consisting partly of monofilaments and partly of a staple fiber yarn exhibiting along its length the ends of the staple fibers composing it. These fibers are much smaller in diameter than either the yarn into which they are spun or the monofilaments – consequently forming a more efficient filter.
The multitude of fibrous ends presented to the gas flow reduces the streamline effect, trapping the fine droplets within the coalescer, and the coarse droplets so formed can be re-entrained in the gas stream leaving the coalescer. These larger droplets are than easily removed by a conventional ‘Becoil’ Demisting Unit or a separate 2nd stage, or by layers of demister mesh on top of a single stage mesh pad combination.
A The combined ‘Becone’ and ‘Becoil’ installation increases collection efficiency in the 2-5 micron range to 98% at least and 99.9% in some case. Pressure loss is increased but not dramatically since the ‘Becone’ Coalescer still has a considerable free volume, even allowing for the introduction of fibrous yarn.