Spray
Dryers:_________________________________________________
Spray Dryers are custom built designs having various atomization
and flow patterns to suit the feed and product characteristics
and can be used for drying of versatile range of products.
Spray Drying is a single step drying operation in which liquid
feed solutions, emulsions, dispersions or slurries are directly
converted to free flowing powder or granules. Read more about
spray dryers and our services in relation to spray dryers below
Rotary
Disc Atomisation_____________________________________________
A high speed rotating disc is used for atomizing the liquid
feed. The disc throws the liquid outward tangentially at high
velocities forming fine droplets / mist by impacting with relatively
slow moving hot air. Instant drying takes place due to extremely
large surface area to volume ratio converting liquid/slurries
into free flowing dry powder.
Discs
designs include straight / curved vanes, pin wheels, multilayer
discs in diameters of 60 mm, 100
mm, 160 mm, 250
mm & 350 mm for different capacities.
For high temperature applications special water cooled bearing
arrangements are available.
Nozzle
Atomisation________________________________________________
Feed
solution or slurry at high pressure is atomized through a
nozzle into fine droplets and then dried instantaneously.
Various types of airflow patterns are possible with nozzle
atomization systems. Nozzle type spray dryers are used to produce
material in the granular, non-dusty or powder form as
required.
Depending on the desired physical properties of end product,
the choice of co-current, counter current or mixed air flow
is selected.
Closed
Loop Spray Dryers___________________________________________
Closed loop spray dryers are used when
the product to be dried is oxidisable or laden with flammable
/ explosive solvents, nitrogen purged. In this case, closed loop systems
are preferred.
Advantages
Air
Broom & Wall Cooling____________________________________________
Wall
cooling arrangements are provided on Spray Chambers handling
products of thermoplastic nature. The arrangements include
and external cooling air jacket and / or internal rotating
arms with air jets to form AIr Bloom on the chamber wall.
Advantages
