Enhanced Vane
Mist Eliminators
Specifically designed to handle
high volume gas flow and reduce fouling, Enhanced vane
mist eliminators are ideal for duties with heavy liquid loads
or where the capacity of conventional mesh equipment is exceeded;
and can be used at K-values up to 1.48 ft/s over a broad spectrum
of applications.
The parallel, chevron construction
relies on the principles of droplet inertia, centrifugal force,
impingement and gravity. Liquid-laden gas within the vane bundle
is forced to change direction several times - which imparts a
centrifugal force onto the stream and throws heavier liquid droplets
against the wetted walls of the vanes where they are incorporated
into the sheet flow of the liquid and drained. Agitation and surface
contact also cause coalescence of small droplets within the vanes.
As with wire mesh mist eliminators, the Enhanced vane mist eliminators
can be installed either vertically or horizontally. Drainage of
liquid from the vane pack to the bulk liquid phase in the vessel
is achieved by means of ‘downcomer pipes’.
Enhanced vane mist eliminators fall into
two categories.
Firstly, simple vanes which separate liquid by impingement,
coalescence and drainage on the vane surface with no disengagement
of the liquid from the gas stream:
• Particularly
suitable for situations with a significant risk of fouling due
to solid particles or high viscosity liquids in the feed
• Usually relatively
low gas handling capacity
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• High capacity designs reduce
equipment size
• Excellent separation performance
even at high gas velocities
Enhanced vane mist eliminators are capable of high separation
efficiency of droplets larger than 10 microns, and pressure drop
is usually specified up to 5mbar.
Materials of construction include stainless steel (316L and 304L),
Monel*, Incoloy 825*, Hastelloy* and titanium with other options
being available upon request.
Plastic vanes are also available for highly corrosive environments
or for simple fume scrubbing applications.
Typical seraration efficiency curve
for
Enhanced high capacity vane mist eliminator
* Monel, Hastelloy,
Incoloy and Inconel are registered trade marks of Special Metals
Corporation, USA.
† Teflon is a registered trade mark of Dupont, USA.
¹ Hostaflon is a registered trade mark of Hoechst, Germany.
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