E EE EEVERON VANE MIST ELIMINATORThe EVERON range of mist
eliminators are the Chevron type of mist eliminators which consist
of a set ofspecially designed vanes with a well defined geometry.
Gas with entrained liquid droplets flows between the vanes of the
EVERON Separator.The gas can easilytake the turns while the liquid
dropletscannot follow the gas streamlines and impinge upon the
walls of the vanes and coalesce to a sizewhere they drop down and
are collected and removed.TheEVERONVFH(Vertical Flow - Horizontally
Placed)TheEVERONHFV(Horizontal Flow - Vertically Placed)C CC
CCAPACITYThe EVERON separators working on the inertialseparation
mechanism can be used efficiently overa wide gas velocity range
without a significant lossof droplet removal efficiency.Thus, for
situationswhere wide flow rate ranges are possible, theEVERON is a
preferred choice compared tocyclonic type mist eliminators.The
operating velocity is obtained by a forcebalance between the
gravitational, drag and surfacetension forces acting on the
entrained droplets.Awide operating velocity range is possible &
thecapacity of the EVERON is only limited by thephenomenon of
reentrainment of the coalesceddroplets and hence the design
velocity has to bekept well below this critical velocity which
leads toreentrainment.E EE EEFFICIENCYEVERONS are largely used for
the separation ofcoarse mist (or spray) from gases and
vapours.Alimit drop size (Dp) is used to characterize themand it is
defined as the smallest particle which canbe removed to an extent
of 99%.P PP PPRESSUREDROPDue to the large percentage of the cross
sectionavailable for gas flow, the pressure drop in a vastmajority
of applications is less than 25-50 mm WG.As mentioned above, for
high efficiencyapplications, a larger pressure drop is to
beexpected.A AA AAPPLICATIONSDue to its constructional features,
the EVERON hasa lowertendencyto fouling.Recommended areasof
operation would therefore include:Applications where droplets will
be sticky orviscous and will plug conventional Knitted/FibreBed
Mist Eliminators.For systems containing certain solids it wouldbe
possible to carry out intermittent cleaningwith spray
nozzles.Situations where wide flow rate ranges arepossible which
renders the cyclonic typesystems
unsuitable.Thismisteliminatorisdesigned for vertical
gasflow.Inthisconfigurationthe vanes are designed toprovide optimum
deflectiontothegascontainingentrainedliquidparticles.Theentrainedparticlescannotfollowthedeflectedgaspathandarecollectedastheyaccumulatealongthewallofthemisteliminator.Collectedliquidrunsdowncountercurrenttothe
direction of gas flow.Thismisteliminatorisdesigned for horizontal
gasflow.In this configuration,speciallydesignedsinusoidal vanes
having aprovision for a phaseseparationchamberareemployed.The gas
flow is split bythese vanes and
theentrainedliquidparticlesaredriven by inertial forces
tothewallsinthephaseseparationchambers.Reentrainment is avoidedas a
separate liquiddrainage path is provided
inthephaseseparationchamber.The normal (Dp)are in the region of
25microns and higher.However, special designsare available for
applications requiringremoval of particles smaller than this size.S
SS SSPECIAL DESIGN FOR
HIGHPRESSURE/HIGHEFFICIENCYAPPLICATIONS.EVERGREEN has designed a
range ofEVERON mist eliminators for criticalapplications in the oil
and gas sector, for high-pressure boiler applications.These
areprimarily of the EVERON HFV configurationwith collection
efficiency of essentially 100%for particles 8 microns and larger
and pressuredrops below 0.1 kg/cm2.These are compactdesigns which
are useful in high-pressureinstallations and offshore platform due
to theirreduced size. EVERON mist eliminators havenow been
operating for such critical duties atoperating pressures as high as
100 bar.In addition, EVERGREEN also offers designsfor horizontal
gas flow wherein theEVERMESH media is used as
anagglomerator/coalescer for fine aerosols whichVarious mist
eliminator configurations are available and typical performance
curves are shown below.are subsequently fed into a vane
(typicallyEVERON HFV configuration) for removal as alarger drop.
Alternatively, for vertical gas flows an EVERONVFHmist eliminator
is placed as the first stagecoarse separator for situations where a
high inletliquid load or a fouling situation is
envisaged.AnEVERMESH unit is then used to effectively clean/polish
these gases downstream of the vane misteliminator.M MM
MMATERIALOFCONSTRUCTIONStandard Material of construction for the
EVERONVFH series are polypropylene & stainless steelwhile for
EVERON HFV series it is PVC &stainless steel.Other materials
can bemanufactured upon request.EVERONHFV - I3-D, MAKER BHAVAN-2,
18 NEW MARINE LINES, MUMBAI - 400 020.TEl: 22012461 / 2201 2706 .
FAX: 22-2201 0024E-mail: [email protected]:
www.evergreenindia.comEVERGREENTECHNOLOGIESPVT.LTD.EVERONVFH(VERTICALGASFLOW)EVERONHFV(HORIZONTALGASFLOW)DIRTY
GAS INCLEAR GAS
OUTSuccessfulareasofapplicationincludeEvaporators,Exhaust
AirCleaning, Chemical Process Equipment, Air Conditioning &
SteamDryi ng, Ai rI ntakeSystems, Natural Gasoperati ons, etc.
