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| Spray
dryers are offered for feeds in liquid form containing
either water or any other solvent. Feeds may be solution,
slurry or emulsion. Depending on the particle size of
the final product required and the nature of feed any
one or combination of following atomization system is
used. |
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Two fluid atomization. |
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High pressure
single fluid atomization. |
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Rotary disc atomization. |
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The final product
obtained from spray dryer is in powder form. By varying the
operating parameters of the spray dryer the required powder
characteristics such as moisture, particle size, bulk density,
flowability, Particle Morphology etc. can be achieved.
Besides manual and semi-automatic systems
we offer PLC and SCADA based systems for easy operation
and monitoring of spray dryer. Multiple systems can be operated
from a single computer thus reducing the manpower requirement.
All the important parameters like temperatures, pressures,
flow etc. are recorded and displayed in the system and can
be retrieved at any given moment.
Capacity: The spray dryers having
water evaporation capacity ranging from 1kg/hr to 18,000 kg/hr
can be offered and supplied. |
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| Operating temperatures:
The spray dryers having operating temperatures up to 1100°C
can be offered and supplied.
CIP Systems: We offer integrated cleaning
in place (CIP) systems in the spray dryers for automatic and
fast cleaning of the complete system. This feature is essential
where multiple products are dried in a single system and frequent
washing is required.
Typical applications of spray dryer are Dyestuffs,
pigments, starch, detergents, milk powder, fruits, pharmaceutical,
herbal extracts, food flavors, ceramics, china clay, enzymes
etc. |
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Flash dryers are used for drying of wet cakes
which are sensitive to heat. There are different
variations of flash dryers available depending
upon the need to disperse the wet cake or pastes.
These are:
Spin Flash Dryer
This consists of a horizontal agitator, which
disperses the feed while it comes in contact with
the hot air and gets dried. |
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Cage
Mill Flash Dryer
This consists of a vertical pin type rotary and stationary
cages. The wet feed is fed at the center of the rotating
cage, where it comes in contact with hot air. The rotating
cage disperses the feed while drying.
Due to very low residence time in the
range of 0.5 to 2 seconds in the flash dryers, heat
sensitive products can be easily dried without degradation.
Particle size of the final product
can be controlled by installing a particle size controller
which recycles the larger particle size back to the
agitator and allows only the pre-determined size particles
to be discharged as product. |
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| Capacity:
We can offer the flash dryers having capacities of 10kg/hr
to 50000kg/hr product rate.
Typical applications of flash dryer are starch,
bagasse, minerals, pigments and dyes, phosphates, etc. |
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Raj Process Equipments pioneer
in Tube Bundle Dryer Manufacturers India can flash dry heat sensitive
products with Spin Flash Dryer and Cage Mill Flash Dryer.DDGS
Dryers Manufacturers India have capacities of 10kg/hr to 50000kg/hr. |
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Rotary dryers are used for drying wet powders
and cakes, which are easily breakable and dispersible.
The rotary dryer consists of a rotating drum with
angle lifting blades which lift the feed as the
drum rotates and showers it in the stream of hot
air flowing through the drum.
The rotary dryers can be used
as calciners using direct or indirect firing.
GMP plants are offered for pharmaceutical,
food, and biochemical applications.
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Capacity:
We can offer the rotary dryers with capacity range
from 100kg/hr to 50000kg/hr product rate and operating
temperatures up to 600°C.
Typical applications of rotary dryers
include silica sand, bagasse, minerals, coconut powder,
etc. |
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| The
process air is supplied to the bed through
a special perforated distributor plate and
flows through the bed of solids at a velocity
sufficient to support the weight of particles
in a fluidized state. Bubbles form and collapse
within the fluidized bed of material, promoting
intense particle movement. In this state,
the solids behave like a free flowing boiling
liquid |
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Advanced
method of drying wet/semi wet solids
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Unlike in Tray Drying every solid particle
is floating in the HOT STREAM of |
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Air which is blown from
down to up creating material layer in
fluidised |
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state |
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Almost every
wet particle directly receives the heat
energy from hot Air |
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resulting in uniform
and quick drying |
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| Features of RAJ Continuous
Fluid Bed Dryers : |
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Very versatile process equipment
for uniform and efficient drying of products. |
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Fully automatic
operation based on PLC control / without PLC control |
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Minimum handling and more
hygienic |
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Lifting & tilting device
of product container for easy handling |
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Option - steam heated or electric
heated blower |
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cGMP model with documentation
as option. |
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| Material
of Construction:
AISI 304 / AISI 316 / Custom made.
Accessories:
Heat recovery unit can be incorporated, cyclone, bag filters,
multiclones, wet scrubber
Applications:
Chemical / Fertilizer / Food - salt, sugar / Mineral - Sand,
Aluminum / Ore calcining / Metal oxidation / Sludge Incineration
/ Pyrolysis of Plastic Waste / Pigment etc.
Capacity available from 5 kg/hr to 2000 kg/hr
water/solvent evaporation. |
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Operating Principle |
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wet feed is continuously agitated
by the heated rotating blades, thus
exposing new areas to heating surfaces.
This results in the moisture boiling
off and rendering the material to
dry to the required degree. |
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| Features
of RAJ Paddle Dryer : |
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Low
running cost – contact dryer. |
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Continuous production machine
without human touch. |
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Ideal
for solvent recovery. |
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Suitable
for Crystalline material. |
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On-line
particle size reduction –
no separate pulverizer required. |
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Factory
assembled & tested. |
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Compact
construction – less floor
area. |
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Choice
of heating medium – steam,
hot water. |
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Minimum
exhaust air quantity – no
elaborate air cleaning equipment
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needed. |
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Absence
of high speed rotating parts –
less breakdowns. |
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Special
paddle form – ploughing and
self cleaning action. |
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Initial
particle size is maintained. |
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| Typical
Applications |
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Crystaline
Solids |
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Pasty
Solids |
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Sludge |
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Agro
Waste |
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Magnesium
Carbonate |
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Polypropylene
Beads |
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| Operation
is fully automatic with low maintenance. |
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Steam
Tube Bundle Dryers are based on the
conduction mode for drying. The product
to be heated and dried only contacts
steamheated tubes, and not directly
steam. Tube bundles are operated on
the counter-flow principle (i. e.
steam flows in the direction opposite
to the direction of the material flow).
The Tube Bundle Dryers are designed
by considering the wet and dry product
flow characteristics, lump crust formation
tendency and thermal sensitivity of
the material in dry condition. |
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| Indirect
Steam Tube Rotary Dryer |
In
Indirect Steam Tube Rotary Dryer the
tubes are arranged in a circumferential
manner on the inner periphery of the
rotating shell. This entire shell
and tubes assembly is supported on
tyres / rollers & driven throughsuitable
gear drive. Wet feed material is fed
through material inlet nozzle installed
at one end of the shell of dryer.
This wet feed is fed through Screw
Feeder. Feed material showered on
the tubes with the help of lifting
blades which are mounted on the rotating
shell. Steam enters in the tubes through
rotating joint installed at material
discharge end of the shell. Material
gets dried & discharged from the
material discharge ports on the shell.
Vapours are removed from the feed
end with the help of suction blower
after separating fines in the cyclone
separator. The suitable sealing arrangement
is provided to prevent air leakage
and product \losses. |
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| Rotary Tube
Bundle Dryers |
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In
Rotary Tube Bundle Dryer the Tube Bundle is rotated
inside the stationary insulated housing. Steam
is passed though one end of Tube Bundle for drying
and condensate is removed from the other end.Wet
feed Material to be dried is fed into the stationary
dryer housing from Feed Nozzle at one end. The
material gets lifted up & showered on tubes
with the help of lifting blades provided on tube
bundle periphery. Material gets dried by conduction
heat transfer & it is discharged from the
other end. |
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| RAJ offers customized
configurations of Steam Tube Dryers : |
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Vapor Exhaust
: Natural Draft / Induced Draft. |
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Fines Recovery : Cyclones
/ Bag Filters / Settling Chambers. |
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Heating Media : Steam / Hot
Oil. |
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Feed preconditioning, Product
backmixing systems. |
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Feed & product handling,
conveying systems. |
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| Features of
the RAJ Steam Tube Bundle Dryer : |
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Operation is fully
automatic with low maintenance. |
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Reduced wear and tear of parts. |
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Less space requirements. |
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Minimum air flow giving the
reduced output of waste air. |
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Fire risk eliminated. |
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Simple installation &
robust Construction. |
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Safe Operation. |
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Low temperature drying for
high quality products to avoid losses of vitamins,
nutrients and taste change. |
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Mild steel or stainless steel
and constructions as required |
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| Applications
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| Distillery Industry
: Drying of distillers grains. |
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| Extraction Industry
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Conditioning
of broken soya beans, sunflower seeds, whole or
flaked rape and other oilseeds. Pre -desolventizing
of oilseed coarse meal prior to the toaster.Drying
of oilseed coarse meal after the toaster. |
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| Brewing Industry
: Drying of spent grains. |
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| Chemical and
Plastics Industries: Drying of granulates |
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| Wood processing
industry : Drying of wood chips. |
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| Environment
processing : For disposal of liquid sewage,
waste water and paper sludge |
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| Other :
In many of these cases the materials viscosity is
improved by partial recycling. |
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