ventilex dryers english
TRANSCRIPT
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FLUID BEDTHERM AL PHYSICAL
PROCESS TECHNOLOGY
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FLUIDIZATION
In a Fluid Bed, a product or solid is made fluid by an upward-
moving flow of gas. The mechanical movement of the Fluid
Bed strengthens this effect. Thus the gas and product are
intensively mixed, so that high heat transfer and an optimum
physical reaction speed are achieved.
By choosing a good combination of gas speed and mechanical
movement (i f necessary), you can process granular products
with a wide range of grain sizes successfully while forming a
minimum amount of dust.
Both the static and mechanical Ventilex Fluid Bed can function
at temperaturesfrom15C to + 600C. The gasspeed can vary
from 0.2 to 3m/sec.
V E N T I L E X F LU I D B E D - 1
Fluid Bed dryer fo r biop lastics
Possibleifagglomerating
FluidBed
Su
b-F
luidBed
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SUB-FLUIDIZATION
Longitudinal mixing occursduring the fluidization process. A sa
result, if the process time is long, the difference in residence
time of the individual particles is too great. This can lead to
damage to the product.
Yet there are products that require long processing. So this
would have to occur in a Fluid Bed with a very high length towidth ratio. This is usually not desirable, among other things
because it takes up too much space.
O ur solution for this problem is sub-fluidization. In thisprocess,
the product remains on the verge of f luidization. O ur unique
drive concept, combined with a rotary weir, makes residence
timesup to 2 hours possible. The layer thicknessof the product
can vary from 5 to 60 centimetres with this process method.
ADVANTAGES OF THE SUB-FLUID BED:
- There is hardly any or no longitudinal mixing. D ifferences
in residence times are kept to a minimum and the various
particles are processed uni formly.
- Less fluidization gas is needed for the process than with
complete fluidization. This means smaller peripherals and
lower energy consumption.
With a Fluid Bed and sub-Fluid Bed a range of products can be
processed which previously could only be processed with a belt
dryer.
The Ventilex sub-Fluid Bed has amply proved its quality in
processing, among others: cereals, seeds, nuts, beans, croutons,
breakfast cereals, cheese, meat, fibers, extrudates, pellets and
plastic granulates.
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sub-Fluid Bed dryer fo r rice
PERCENTAGEPRODUCT
RESIDENCE TIME
Sub-Fluid Bed
Fluid Bed
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V E N T I L E X F LU I D B E D - 3
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FLUID BED
Each product has its own, specific characteristics. By means
of careful testing in our laboratory, we determine the most
effective and efficient processing method. The installation is
then designed and built internally by Ventilex.
A s the diagrams show, there are several versions of the air
supply system, the Fluid Bed and the flue/discharged gassystem. They can be combined in different ways.
AIR SUPPLY SYSTEM S:
1a Ventilator/Fan
1b Ventilator/Fan in combination with heat exchangers
1c/d Ventilator/Fan in combination with direct burner
(gas / oil)
1e Ventilator/Fan in combination with indirect burner
(gas / oil)
1f Dehumidifying by cooling
1g Dehumidifying by adsorption
VERSIONS OF THE FLUID BED:
2a C ooler
2b D ryer
2c Combination dryer/cooler
2d Combination dryer/cooler with rotary weir
2e Static dryer/cooler with internal heat exchangers
2f Static dryer/cooler
FLUE/DISCHARGED GAS SYSTEMS:
3a Cyclone
3b Cyclone in combination with a wet scrubber
3c Cyclone and filter
3d Filter
3e Venturi scrubber
FLUID BED APPLICATIONS
The Fluid Bed can be used in the following processes:
Fluid Bed d ryer /cooler f or b readcrumb
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agglomerating fermenting
baking freeze drying
blanching inert gas drying
calcinating pasteurizing
conditioning puffing
cooling (evaporat ive) reacting
deactivating enzymes roasting
dedusting steam stripping
drying sterilizing
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Fluid Bed dr yer/cooler fo r cereals
APPLICATIONS
The Food, D iary and Nutraceuticals industries processthe following
productsamong othersin a Ventilex Fluid Bed:
V E N T I L E X F LU I D B E D - 5
beta carotene herbs and spices rice
breadcrumbs K G A salt
calcium gluconate lactitol, sorbitol, xylitol sausage farce (rusk)
cereals lactose seeds
cheese licorice extrudate soya
cocoa beans lycopens sugar
coffee meat tea
crumb nuts/peanuts tobacco
dextrose potato flakes tomato pulp
G DL powdered milk vitamin A
grains PUFA vitamin C
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FOOD, DAIRY AND
NUTRACEUTICALS
Within the Food, Diary and Nutraceuticalsindustries, the Fluid
Bed is applied for:
- derivates.
- supplements.- ingredients.
- end products.
A whole range of products can be processed in the Fluid Bed
and sub-Fluid Bed and long residence times, up to two hours
per machine, are possible. O ur unique drive provides an ideal
plug-flow.
SPECIFIC CHARACTERISTICS/ADVANTAGES
Naturally hygiene has top priority in the food industry. The
sanitary design (FDA /USDA -GM P) ensuresthat our installations
meet the high requirements of this industry.
O ur installations are completely made of stainlesssteel and all
the product contact parts are polished and welded.
The quick-acting closures and the C .I.P. system (C leaning In
Place) make the installation easy to disassemble and to clean.
Then production can quickly be resumed.
The Ventilex Fluid Bed system is preferable to the traditional
belt dryer. It tak es up less space, has low energy consumption
and no product loss. What is more, the installation and
maintenance costs are considerably lower.
For processes that contain solvents or alcohols, Ventilex offers
a closed-loop system. Inert gas blanketing along with solvent
condensing and recovery can be provided as a complete system.
Advanced oxygen analyzing is incorporated in our special control
system.
sub-Fluid Bed dr yer/cooler fo r cheese
Fluid Bed dryer /cooler for vi tamins
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BIOM ASS, ANIM AL FEED
AND INORGANIC WASTE
It is possible by means of Fluid Bed processing to upgrade
waste products and make them suitable for re-use. In this
way the environment is burdened as little as possible.
SPECIFIC CHARACTERISTICS/ADVANTAGES
This industry will often have to deal with a product in which
the size of the individual particlesdiffer greatly from each other
and the humidity is high. The Ventilex Fluid Bed guarantees a
high evaporation rate at low temperatures and low energy
consumpt ion. O ur unique drive ensures that we can mak e
the Fluid Bed as big as the product requires.
By making use of product recirculation and mixing, you can
also process slurry-lik e products. I t is important to know that
our installations are resistant to corrosion.
O dor-suppression is another important aspect. We achieve
this by making use of either a closed system air recirculation,
biobed and/or thermal exhaust gas combustion.
RTO-after bu rner
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APPLICATIONS
The Ventilex Fluid Bed is used in these industries for
among othersthe following products:
blood meal paper waste
citrus peel potato residue
compost return brood
domestic waste slaughter waste
fish feed sludge
fish meal wood
manure
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Fluid Bed dryer fo r biop lastics
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mixer
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APPLICATIONS
In the mineral industry, the Ventilex Fluid Bed isused to
processamong othersthe following products:
sand-drying insta l lat ion under construct ion
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aggregates gypsum
blast furnace slag iron slag
calcium carbonate limestone
calumite marble sand
china clay non-ferrous metals
copper slag rock salt
ferrous metals sand
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M INERALS
To processthese products a strong, solid installation isneeded.
The Ventilex Fluid Bed systems are therefore durable and
corrosion-resistant.
SPECIFIC CHARACTERISTICS/ADVANTAGES
For this industry it is important to be able to work at hightemperatures. In the Ventilex Fluid Bed temperatures up to
600C can be achieved. Eff icient consumption of energy is
possible due to heat recuperation/recovery from the
flue/discharged gases.
In addition, the Fluid Bed can be divided into different
compartments. In this way it is possible to dry and cool
(evaporative) within a single installation, which saves a lot
of space.
Compared to a rotary dryer, the Fluid Bed system has a very
short start-up and stopping time. O ther advantages are
lower energy consumption, by drying and cooling within
one machine, and a long service life of the installation.
The installation functions fully automatically, even w ith
varying entry humidity and product amounts or feed rates.
Fluid Bed dryer and cooler for kaol in
Fluid Bed dryer/cooler fo r kaolin
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CHEM ICALS
To process chemical products, Ventilex offers total solutions
with the right flue/discharged gas systems. They have been
designed specially for the chemical industry.
SPECIFIC CHARACTERISTICS/ADVANTAGES
Naturally the Ventilex Fluid Bed installations are corrosion-resistant. What is more, we use various materials such as tita-
nium, hastelloy, duplex and superduplex, depending on the
properties of the product to be processed.
APPLICATIONS
In the chemical industry, the Ventilex Fluid Bed is used to
process among others the following products:
V E N T I L E X F LU I D B E D - 1 1
static Fluid Bed dryer/coo ler for KNO3 ammoni um sulphate pesti ci des
butyl rubber plastic granulate
calcium chloride polymers
Carboxyl M ethyl Cellulose potassium chloride
chemicals potassium sulphate
chromic acid rubber pellets
detergent powder salts
fertilizer silica gel
flame retardant sodium sulphate
herbicides twaron (K evlar) pulp
hexamine vanadium oxide
penta eritritol Zn Pb granulate
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Fluid Bed dryer/cooler fo r aramide
Fluid Bed cooler for detergent p ow der
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SPECIALS
As described, Venti lex designs client-specif ic solutions with
various combinations of the air supply system, the Fluid Bed
and the flue/discharged gas system.
But we have even more to offer: the specials.
A FEW EXAM PLES ARE:
1 Batch dryer with integrated filter. This batch dryer is used
for products that require a high processing temperature or
different temperature phases.
2 Steam treatment system for food in combination wi th a
Fluid Bed dryer/cooler.
3 Combination of a Fluid Bed baking oven and a Fluid Bed
dryer/cooler.
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VENTILEX TEST FACILITIES
In our laboratory, we can simulate processes with varying
parameters and thus determine the best possible product
processing. This is necessary for many processes to prevent
damage to the product.
Samples can be subjected to tests at temperatures up to
600C . A fter carefully analysis of the results, each installation
is custom designed and manufactured.
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laboratory t est insta l lat ion
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Europaweg 8 8181 BH Heerde P.O . Box 158 8180 AD Heerde The Netherlands
Tel +31 (0) 578 69 82 00 Fax +31 (0) 578 69 82 82 E-mail: info@ ventilex.nl www.ventilex.nl
Ventilex USA Inc. 4640 Emerald Way Middletown, OH 45044 USA
Toll Free +1 866.265.6823 Tel +1 513.874.4451 Fax +1 513.870.5173 E-mail: [email protected] www.ventilex.net