7/29/2019 Begg Cousland_Becovane Technology 2010
3/4
BECOVANE CHEVRON DROPLET SEPARATORS
The BECOVANE range of droplet seaparators are the CHEVRON type
of filters which consist of a set of speciallydesigned vanes with a
range of design geometries for varying applications.These mist
eliminators employimpingement as the mechanism of separation
Gas with entrained liquid droplets flows between the vanes of
the BECOVANE Separator. The gas can easily takethe turns while the
liquid droplets cannot follow the gas streamlines and impinge upon
the walls of the vanes andcoalesce to a size where they drop down
and are collected and removed.
Vertical Flow Horizontal Flow
CAPACITY
The BECOVANE separators working on the inertial separation
mechanism can be used efficiently over a wide gasvelocity range
without a significant loss of droplet removal efficiency. Thus, for
situations where wide flow rateranges are possible, the BECOVANE is
a preferred choice compared to cyclonic type mist eliminators.The
operating velocity is obtained by a force balance between the
gravitational, drag and surface tension forces
acting on the entrained droplets. A wide operating velocity
range is possible & the capacity of the BECOVANEis only limited
by the phenomenon of reentrainment of the coalesced droplets and
hence the design velocity hasto be kept well below this critical
velocity which leads to reentrainment.
EFFICIENCY
BECOVANES are largely used for the separation of coarse mist (or
spray) from gases and vapours. A limit dropsize (p) is used to
characterize them and it is defined as the smallest particle which
can be removed to an extentof 99%. The normal (p) values for
BECOVANES are in the region of 25 microns and higher. However,
specialdesigns are available for applications requiring removal of
particles smaller than this size.
PRESSURE DROPDue to the large percentage of the cross section
available for gas flow, the pressure drop in a vast majority
ofapplications is less than 25-50mm WG. As mentioned above, for
high efficiency applications, a larger pressuredrop is to be
expected.
APPLICATIONS
Due to its constructional features, the BECOVANE has a lower
tendency to fouling. Recommended areas ofoperation would therefore
include:
Applications where droplets will be sticky or viscous and will
plug conventional Knitted/Fibre Bed MistEliminators.
For systems containing certain solids it would be possible to
carry out intermittent cleaning with spray nozzles.
7/29/2019 Begg Cousland_Becovane Technology 2010
4/4
The BECOVANE mist eliminators are available in stainless steel
and polypropylene as standard materials ofconstruction. Other
materials can be manufactured upon request.
The BECOVANE BCVH-01 mist eliminator is designed for horizontal
gas flow. In this configuration, speciallydesigned sinusoidal vanes
having a provision for a phase separation chamber are employed. The
gas flow issplit by these vanes and the entrained liquid particles
are driven by inertial forces to the walls in the phaseseparation
chambers. Re-entrainment is avoided as a separate liquid drainage
path is provided in the phaseseparation chamber.
BECOVANE PERFORMANCE DATA
3 STAGE VANE 2 STAGE VANE
Successful areas of application include Evaporators, Exhaust Air
Cleaning, Chemical Process Equipment,Air Conditioning & Steam
Drying, Air Intake Systems, Natural Gas Operations, etc.
BECOVANE CONCEPTS WITH HORIZONTAL GAS FLOW
Begg Cousland & Co. Ltd.
Studio 3, Doges
Templeton on the Green62 Templeton StreetGlasgow G40 1DAUnited
Kingdom
Tel + 44 141 556 5288
Fax + 44 141 554 7447
E-mail : [email protected]
Web : www.beggcousland.com
