 AlfaVap
Rising Film Plate Condenser
Looking for a cost effective solution for low pressure vapour condensation?
Alfa Laval's AlfaVap, the world's first rising film plate condenser,
requires less space, material, money and still provides higher heat
transfer efficiency.
The AlfaVap plate evaporator is the result of development work
done in collaboration with beet sugar manufacturers in the late
1980s. This new type of costeffective rising film evaporator rapidly
became a success in the beet sugar industry and has subsequently
spread to many other applications.
There are currently more than 1500 AlfaVap evaporators installed
in different applications all over the world, and Alfa Laval provides
a complete range of AlfaVap evaporators for a wide selection of
applications and capacities.
How It Works
Using a special corrugated plate pattern to generate more turbulence,
the AlfaVap provides much higher heat transfer coefficients than
the conventional shell and tube evaporator. Designed with evaporation
in mind, the AlfaVap features two small inlet feed connections and
a large outlet for the vapour and concentrate, one large inlet connection
for the heating steam, and two small outlets for the condensate.
Using the cassette concept with the plates welded in pairs, the
heating steam is condensed in the welded channels while the evaporated
product passes through the gasketed channels.
Why Choose AlfaVap?
High heat transfer efficiency - The special corrugated plate
pattern induces a high degree of turbulence, providing substantially
better heat transfer coefficients than conventional shell-and-tube
evaporators. AlfaVap is especially efficient at high concentration
and high viscosities, and can work with temperature differences
down to 3-4°C. This is a big advantage when AlfaVap is used in TVR
and MVR systems.
Cost saving - High heat transfer efficiency means that much
less heat transfer area is needed compared to shell-and-tube evaporators.
This makes AlfaVap extremely economical, especially when exotic
materials such as SMO, titanium, nickel and Hastelloy are required.
In addition, the compact and flexible design of AlfaVap drastically
reduces transport, erection and installation costs compared to shell-and-tube
units.
Less fouling and easy maintenance - The high turbulence
over the whole plate does not just reduce fouling but also makes
chemical cleaning very effective. Due to the low hold-up volume,
only very small quantities of cleaning chemicals are needed compared
to shell-and-tubes. The flexible design of the AlfaVap means the
heat transfer surfaces are easily accessible for inspection or mechanical
cleaning by simply removing the tightening bolts and rolling back
the pressure plate.
Easy to increase capacity - A popular feature of AlfaVap
is that the capacity can be increased or reduced by just adding
or removing cassettes in the existing frame. This is a major advantage
in relation to shell-and-tube evaporators, where capacity is fixed
at the level decided on at the time of installation.
Improved product quality - The extremely low hold-up volume
means that very little product is actually in the AlfaVap at any
given time. The short time the product spends in the evaporator
is a big advantage for heat sensitive products. It also permits
rapid start-up and shut down, with only minimal waste.
Applications
There are more than 1500 AlfaVap and/or AlfaCond installations in
different applications all over the world. Alfa Laval can provide
a complete range of AlfaVap and AlfaCond units for a large range
of applications and capacities. Some of the applications where AlfaVap
and/or AlfaCond units are installed include: Alumina liquor Ammonium
lactate Ammonium nitrate Beet sugar Calcium chloride Cane sugar
Copper electrolyte Corn steep liquor Dextrose Effluent streams Electrolytes
Ethanol reboilers Ethylene glycol Ferric chloride Fish and meat
extract Fish and meat stick water Fish silage Fructose Fruit juice
Gelatine Gluconic acid Glucose Glycerine Hydrolysate Kaolin Lactic
acid Lysine Maltodextrine Maltose MEA reboilers Polyols Soap Sodium
chloride Sodium hydroxide Sodium sulphate Sorbitol Stillage Waste
waters Vinasses
Call us today. Tel: 905.940.0961
or by Email: info@valutechinc.com
|
