Mist Extractor Selection

[tuan]

I know that mesh pad type mist extractor is generally less expensive than the vane type but in which conditions, vane type is the one which in anyway is needed as per process design?

[jeem]

The core difference here is that mesh pad captures droplets by impaction + coalescence however, vane type forces gas to change direction, droplets slam into plates and drain.
Mesh = delicate but efficient for small droplets
Vane = tougher, handles dirty, aggressive flow

[ww2i]

Mesh pads choke when liquid load gets high. They flood, pressure drop spikes, and efficiency collapses.
Vane packs handle much higher liquid rates because liquid drains by gravity along the vanes. There is no “liquid holdup” like mesh fibers.
Use vane type when:
Knockout drums with slugs
Compressor suction scrubbers with upset conditions
Any system with intermittent liquid surges