Nickle Wire Mesh Demister
Nickle Wire Mesh Demister, also called Nickle Mesh Demister, remove
droplet by impingement on the wire surface. The liquid collected on
the filaments is then able to drain from the pad under gravity.
They have a limited range of useful operation in which they provide
almost complete removal of droplets down to about 3-5 microns.
Turndown range of vapor rate is around 3:1. At excessively high
vapor velocities, the liquid droplets that impinge on the wire
surface are sheared off by the vapor and re-entrained before they
are able to drain.
At very low vapor velocities, all but the larger droplets are able
to follow the vapor path through the nickel mesh and thus avoid
impingement; however the inherent design of the separator vessel
means that in most applications an effective turndown performance
of 10:1 can be achieved. Nickel wire mesh demisters are well suited
to remove mechanically formed entrainment from packed and tray
process towers, spray columns, venture scrubbers and other gas
scrubbing devices. They are also a widely used de-entrainment
device in knock out drums and separators.
* Nickel demister pad has good resistance to corrosion in acid and
alkali and is most useful under reducing condition. It has
outstanding resistance to caustic alkali up to and including the
molten state. In acid, alkaline and neutral salt solution, it shows
good resistance, but in oxidizing salt solution severe attack will
* It is virtually immune to inter granular attack above 315C,
chlorates must be kept to a minimum.
* It has resistance to mineral acid vary according to temperature
and concentration and whether the solution is aerated or not.
Corrosion resistance is better in de-aerated acid.
Typical limit drop sizes= 3 microns
Mesh pad velocities= 450fpm
Typical mesh pad pressure drop STP= 0.4" w.c.
Mesh pad + profile mist eliminator velocity= 1100fpm
Typical pressure drop for mesh pad + profile mist eliminator
combination 0.6" w.c.
Filtration rating: 98%-98.9%