SIEBTECHNIK-Centrifuges
for continuous and mechanical separation of solids from liquids
In nearly all cases of mechanical liquid/solids
separation, continuously operating centrifuges are the
best technical and economical proposition. They can
dewater large quantities of solids to low final moistures,
whilst needing little space, energy and time. The correct
centrifuge will reduce the cost of thermal drying
considerably and may even make it superfluous.
SIEBTECHNIK specialise in the development and
manufacture of continuously operating centrifuges.
Our technical experts are at your disposal to advise
you on the most suitable centrifuge. Machines are
available for tests either on your premises or in our
test establishment.
CONTURBEX worm/screen centrifuge
The most versatile of our continuously operating centrifuges are worm/screen centrifuges
in which the solids retained on the sieve are transported from the small to the large
diameter through the angle of inclination of the basket and the slightly different speed of
the scraper worm. With an angle of inclination of the basket adapted to the feed material,
widely different products such as short fibre cotton linters, ice crystals from freeze
concentration or granular plastics, but especially salt crystals of diverse origin and
consistency are successfully separaten from the mother liquor and, where necessary,
purified by washing. Depending on the operational conditions, the screen basket is
provided with perforated sheets or slot sieves.
Pusher Centrifuge
The pusher centrifuge is, as the worm/screen type centrifuge, a continuously operating
filtration centrifuge. The size of the separated solid particles will be preferable > 80 μm.
The solids will be retained as a cake on a wedge wire basket and transported by an
oscillating step by step movement of the inner basket axial in the direction of the solid
discharge. The application of a pusher centrifuge is especially then advantagerus, when
based on the product characteristics, a high wear of all product contacting parts is
expected, a long retention time of the solids is required or loss of solids in the filtrate,
crystal breakage and abrasion should be low.
In addition a very intensive washing of the solid cake and, if required, a separate discharge
of the solid cake and a separate discharge of mother liquid and washing liquid is possible.
TURBO-CASCADE Sliding Discharge Centrifuge
The TURBO-CASCADE is a special centrifuge which was developed for the dewatering
of solids with a uniform particle size down to about 0.5 mm. The granules slide individually,
not as a compact layer, over stepwise arranged screen segments.
Baffle plates which rotate with the basket prevent them from jumping to another segment.
In spite of the very short retention time of each individual particle in the centrifuge, final
moistures down to 0.01 % are being attained.
Vibratory Centrifuge
The highest throughputs, up to 350t/h of solids, are attained with vibratory centrifuges in
which the solids, which are retained by the sieve, are transported from the small to the
large diameter by axial vibrations which exceed the rotary movement. Since this conveying
mechanism fails at high centrifugal forces, vibratory centrifuges are in the first place
suitable for processing mass products which can easily be dewatered to a relatively good
final moisture.
Decanter Centrifuge
Decanter Centrifuges are used to separate very fine solids from liquids of lighter density.
The solids form a sediment in the liquid, but are not retained by a screen as in a screening
centrifuge.
The speed of sedimentation can be increased by adding flocculents. In the solid bowl
centrifuge the sedimented solids are transported by the scroll to the smaller diameter
and discharged, while the clear liquid flows over the adjustable weir at the cylindrical end
of the machine. The screen decanter is a combination of a decanter and a screen
centrifuge, which has a screen section to further reduce the final moisture. Material passing
through the screen section can be recycled to the centrifuge feed.
2
Calculation of the centrifuge
characteristic number
V g
·
=
r
z
V2
n
2
()
#
z =
r·g
Speed
n = [min-1]
Diameter
D = [m]
Radius
r
·r
30
Sr n
v=
[m/s]
30
ir
m
cu
fe
re
ia
nt
ls
p
d
ee
v
=
[m
/s
]
Speed n = [min-1]
2
V g
·
=
r
z
= D/2[m]
C
Centrifuging factor z
2
Calculation of the peripheral speed
Diameter D = [m]
3
Centrifuging factor and
retention time of the
product are parameters
affecting the capacity of
the centrifuge, whether
for screening or
decanting machines.
Worm/Screen Centrifuge CONTURBEX
Description
Special executions
The construction and working method of the Conturbex
Worm/Screen Centrifuge is shown in the cross
sectional drawing. Drive unit, bearings, rotating parts
in the liquids chamber and the solids discharge are
clearly visible and easily accessible for maintenance.
The drive is by vee-belts and the speed of the rotating
parts is chosen to sult the process requirements. A
cyclo gear unit ensures the necessary differential
speed between worm and basket, even with a high
friction between the two. An overload protection
system prevents damage to the cyclo gear unit.
Gearbox and bearings have a pressurised lubrication
system, with the exception of the H 200 which has a
oil filled gearbox.
Machine and drive motor are mounted on a base frame
provided with rubber feet which can be bolted to the
support construction.
Even our largest centrifuge can be installed without
special foundations or balancing weights. The relative movement of the worm, ensures even distribution
of the solids on the screen, thus preventing undue
vibration. No potentially unbalancing solids remain in
the worm when the machine is stopped.
z
z
z
z
z
Sealing of process chamber by means of:
- Gas Labyrinth
- PTFE ring
- Sliding ring seal
Filtrate cyclone with or without the facility
to recycle gas into the solids chamber
Collecting ring for concentrated discharge
Feed via screw conveyor
Separate wash water discharge
Further special executions on request.
Materials of Construction
The contact parts are made from Austenitic Steel,
special Bronze, Hastelloy, Nickel, Titanium or similar
depending on the application. With abrasive materials,
the vulnerable zones are protected by abrasion
resistant materials.
4
CONTURBEX Worm/Screen Centrifuge H 1000
The rotating parts
For the Conturbex Worm/Screen Centrifuge these are
either cylindrical or conical with 20 or 10° inclinations.
The worm which rotates with a differential speed
determines the transport speed and the retention time
of the solids on the screen.
With conical rotating parts the movement of the solids
is helped by the inclination. This angle is determined
by the manufacturer and influenced by the process
requirements.
Angle of inclination 20°
Angle of inclination 10°
Cylindrical execution
This standard execution has
proved excellent with most
products and problems. The solids
slide from the smaller to the larger
diameter aided by the increasing
centrifugal force, but without
significant push from the worm.
This angle is preferred when intensive washing on the screen is
necessary.
Special execution for purposes
such as dewatering of ice crystals
and cellulose derivatives.
Standard executions
Type
1)
CONTURBEX
H 200
H 250
H 320
H 350
H 400
H 450
H 520
H 600
H 700
H 1000
Feed capacity 1) about m³/h
1.5
3.5
7.0
10
15
20
25
35
50
100
Drive motor
about kW
3.0
5.5
7.5
11
15
22
30
37
55
90
Length
mm
700
910
940
1150
1150
1150
1480
1560
2150
2600
Width
mm
880
1050
1165
1500
1500
1500
1920
2000
2100
2700
Height
mm
570
800
950
970
1150
1150
1470
1470
1650
2600
Weight
kg
230
560
700
900
1000
1100
1800
2000
4000
8000
The actual capacities depend on the properties of the material and their
separation characteristics.
We reserve the right to make changes which serve technical progress.
5
9 Worm/Screen centrifuges type CONTURBEX H 1000 for dewatering KCL crystallisate
Worm/Screen Centrifuge CONTURBEX used successfully for:
Adipic Acid
Dimethylterephthalate
Pentaerythrite
Sodium Bisulphite
AH-Salt
= DMT from Methanol
Plastic Granules
Sodium Carbonate
Amino Acetic Acid
Dipterex
Plexiglas Beads
Sodium Chlorate
Ammonium Persulphate
Disodium Phosphate
Polyethylene
Sodium Chloride
Ammonium Phosphate
Finely chopped onions
Polymethacrylate
Sodium Formiate
Ammonium Sulphate
Fungal Mycel
Polystyrene
Sodium Gluconate
Ammonium Thiosulphate
Glacial Acetic Acid
Polyvinylalcohol
Sodium Metaborate
Anthracene
Glauber Salt
Potash
Sodium Nitrate
Aspirin
Greaves
Potash Alum
Sodium Nitre
Bisphenol
Gypsum
Potash Solvent Residue
Sodium Perborate
Borax
Hops frome
Potassium Bicarbonate
Sodium Phosphate
Calcium Formiate
Methylene Chloride
Potassium Bichromate
Sodium Sulphate
Carboxy-Methylcellulose
Ion Exchange Resin
Potassium chloride
Sodium Sulphite
Celluloid Wool
Ironsulphate Heptahydrate
Potassium Monochromate
Sodium Tetraborate
Cellulose Wool
Lactose
Potassium Pensulphate
Sodium Thiosulphate
Chocolates (broken)
Manganese Sulphate
Potassium Phosphate
Tartaric Acid
Citric Acid
Methylcellulose
Potassium Sulphate
Tin Sulphate
Coal Slurry
Monosodiumphosphate
PVA
Trisodium Phosphate
Coffee Freeze Concentrate
Naphtionate
PVC
Vegetables
Coffee Grounds
Nuts (broken)
Pyrazolene
Vegetable Extracts
Copper Sulphate
Nylon Chips
Rock Salt
Zinc Sulphate
Cotton Linters
Oxalic Acid
Rubber Regenerate
and many others
Crystal Soda
Patent Soda
Silver Nitrate
Date Stones
Pearl Polymerisate
Sodium Acetate
6
2 Worm/Screen centrifuge type CONTURBEX H 600 for dewatering Ammonium Sulphate
7
Worm/Screen Centrifuge with Pre-thickening Type CONTHICK
General
The design of this centrifuge is based on the technology
of our CONTURBEX Worm/Screen Centrifuge with
additional pre-thickening unit for high efficiency separation of low solid concentration slurry as well as high
recovery of fines.
Operation
The purpose of this centrifuge is to separate solids
from liquids out of a slurry. The slurry is fed via an inlet
pipe to the pre-thickening part of the centrifuge via
openings at the center in the worm body.
The main liquid will be discharged at the backside of
the bowl via a stepless adjustable overflow to obtain a
clean liquid separation (filtrate).
The solids will be pre-thickened and transported to the
centrifuge's screen where final dewatering and product
washing, if needed, takes place.
Both liquid streams can be discharged separately or
jointly together in one liquid stream through a double or
single filtrate discharge cyclone, depending on the
process requirements.
The loss of fine particles is relatively low and can even
be minimized by feeding the screen liquid back to the
feed of the CONTHICK.
8
The solids retained on the cylindrical screen are transported axially over the screen by the worm to the solids
discharge housing.
Machine
An amply dimensioned Cyclo-gear unit ensures a
constant differential speed between worm and bowl/
screen and so a constant process performance.
The centrifuge is driven by means of an electric motor
with V-belt transmission. Depending on process
requirements a frequency converter can be used for
variable main speed and/or variable differential speed.
The machine is arranged on large rubber buffers for
vibration isolation.
The centrifuge is equipped with a special profile wedgewire screen with maximum open area but, if processwise required, also with special perforated screen
plates. All screens are very easily replacable without
dismantling the machine and rotating parts.
Depending on process requirements the centrifuge
housing can be equiped with rinsing connections for
cleaning of the process parts.
Another important option is the possible modification
of an existing CONTURBEX to CONTHICK type in
case of a change in product specification and/or feed
conditions.
Typical application
z
Crystals, Granulates or fibres with good
sedimentation properties
The gear and bearing housing are from a very strong
welded normal mild steel construction. Other materials
are available depending on process requirements, up
to titanium etc.
z
Particle size d' > 0,050 mm in RRSB-graph
The great advantages
z
Feed concentration of solids to the centrifuge
from 0 - 60 wt %
z
High yield (low solids loss)
z
Low final moisture
z
Long service life of screen element
z
Overhung design offering:
Todate with normal screen centrifuges an efficient
separation ( yield ) of fine particles in the range of 50 to
100 micron could be achieved only under the condition
of a very good pre-thickening of the feed slurry. This
pre-thickening stage is included in the design of the
CONTHICK centrifuge.
z
Easy replacement of screen without
dismantling of worm
z
Simple design of gastight execution
z
Possible modification
of existing CONTURBEX
Material quality
For normal general application the rotating (wetted)
parts are made from stainless steel, quality 1.4581 / 71
(AISI 316 Ti) and in addition the flight-tips could have
a highly wear resistant hard coating.
Details of rotating parts
Standard executions
Type
CONTHICK H/V
240/180
320/240
450/340
600/450
800/600
1000/750
1200/900
5.5
7.5
15
30
55
90
132
Length
mm
1150
1200
1550
1800
2250
2700
3200
Width
mm
1200
1200
1550
2000
2100
2660
3100
Height
mm
800
850
1100
1300
1800
2100
2300
Weight
kg
700
750
1300
2000
4200
7500
10000
Drive motor
ca. kW
9
Pusher Centrifuge SHS - double step cylindrical- conical
Description
In the pusher centrifuge the transport speed of the
solids, sliding over the wedge wire basket, is lower
than in the worm/screen centrifuge. Consequently the
retention time of the material to be centrifuged in the
basket is longer. The pusher centrifuge is especially
suitable for separation of abrasive product.
An additional advantage is a reduction of the pushing
energy for the transport of the solids.
Single step pusher centrifuges are the most economic
solution for simple separation, which means separation
of coarse crystal solids from a slurry with high solid
concentration.
In addition the relatively thick, dense filter cake ensures
a good yield of the very fine solids. Both criteria - long
retention time and dense filter cake - will give the
possibility of economical additional dewatering of predewatered solids with high content of fines coming from
all kind of filters.
The most frequently used execution is the double-step.
Double-step pusher centrifuges are for a more
universal application than a single-step pusher
because of the shorter steps.
Variable solid concentration and/or finer particles in
the feed can be handled easier. Additionally intensive
washing of the product cake with washing liquid,
displacing the mother liquid, can be realized much
easier.
Siebtechnik pusher centrifuges are executed with 1-,
2- and 3-step rotating parts. In most applications the
outer basket will be cylindrical-conical. In the conical
part of the outer basket the filter cake will loosen itself
because it adjusts itself all the time on a different
diameter to make the discharge of the capillary liquid
easier.
3-step pusher centrifuges are in favour when the
mother liquid has a high viscosity and/or it is necessary
to have a separate washing step.
Standard executions Type SHS/SHS-ZK
Nominal diameter
250
350
450
530
600
800
900
1000
1100
1200
single step cylindrical and cylindrical/conical
x
x
x
x
x
x
x
x
x
x
2-step
cylindrical and cylindrical/conical
x
x
x
x
x
x
x
x
x
x
3-step
cylindrical and cylindrical/conical
x
x
x
x
x
x
2600
2750
2750
3300
3675
3750
x
Lenght
mm (approx.)
1500
Width
mm (approx.)
850
950
1100
1800
1800
2000
2000
2400
2400
2400
Height
mm (approx.)
950
1020
1050
1700
1700
2050
2050
2150
2250
2250
800
1150
1900
5000
5600
8000
10000
14000
15000
16000
Operational weight in kgs (approx.)
1750
1900
We reserve the right to make improvements which are required by technical progress.
10
2600
Rotating parts single step
cylindrical/conical
Construction
The Siebtechnik-pusher centrifuge shows a clear
separation of:
z
Process part
z
Location of bearing
z
Hydraulic mechanism
The rotating parts are in a horizontal position, sothat
process part and drive parts are easily accessible.
This centrifuge is designed according to a unit system,
considering constructional and operational criteria.
Basic element is the machine housing, includes
following elements:
z
pump unit (including hydraulic control)
z
pressure switch and thermometer
z
bearing arrangement
z
drive for rotating and pushing movement
The basic machine housing is separated into 2
chambers.
The 1st chamber serves as oil reservoir for the
hydraulic oil and also to fit the necessary oil cooler.
The 2nd chamber is designed to be filled with scrapconcrete, therefore an extra vibrating table (stabilizing
mass) is not necessary.
Under the basic machine housing of the complete
pusher centrifuge shockabsorbing flexible elements
are fitted with the foundation or steel construction, as
an intermediate flexible, that means with low point of
gravity.
The product housing is fitted in a free overhung way
to the basic bearing housing. This product housing, or
wetted area, is divided into a filtrate- and solids
discharge housing. Also in free overhung construction
are the rotating and pushing parts in the wetted area
or product housing connected to concentric hollowand pushing shaft.
On the inside of the baskets with large holes (staggered
round holes) are wedge wire screens with screen
openings or slots, running parallel to the axis, that
means in the direction of the pushing movement.
Rotating parts 3-step
cylindrical/conical
The overhung baskets are open at the solid-collecting
part and the backside is closed by the pusher bottom
and pushing rings.
The front side of the product housing is closed by a
large hinged cover plate in 1 or 2 parts. Through this
opening easy assembling and disassembling of wear
parts, like wedge wire basket, feed cone etc. is
possible.
A 3-phase motor drives the rotating parts via a V-belt
transmission. It is possible to change the basket speed
by changing the motor V-belt pulley.
The pushing parts are operating hydraulically. The oil
quantity and oil pressure is supplied by a screw spindle
pump, driven by a 3-phase motor.
Materials of Construction
Depending on the application all product contacting
parts, are made of stainless steel, austenitic steel,
special bronze, Hastelloy, nickel, titanium or others. In
case of abrasive products we protect the vulnerable
zones with abrasion- or wear-resistant material.
3-step rotating parts
11
Special executions:
z
z
z
z
z
Filling system with pre-dewatering (DBP)
Feedsystem including pre-dewatering
(DBP-DE 19546019C)
Gas-tight execution
for processing with inert gas
Product inlet by means of a screw feeder
Separate discharge of mother-liquid
and washing liquid
Further special executions available on request
Pusher bottom
Divider cone
Screening element
Ring pocket
Operation of the double-step
pusher centrifuges
The mixture of solids and liquid is continuously fed
through the inlet pipe into the distribution cone that
rotates with the same speed as the basket.
Here the mixture is accelerated and flows through the
ring-gap between pusher-bottom and distribution cone
into the pocket-ring.
In the pocket-ring the mixture is smoothly accelerated
till the circumferential speed and flows over the edge
of the pocket-ring in the form of an equal overflowing
suspension-film onto the complete screen-area of the
feed-zone.
Most of the liquid is centrifuged off through the
screenopenings and the solids are retained on the
screen as a filter cake.
Apart from rotating, the interior basket makes an axially
oscillating movement. Due to this so-called pusher
movement the filter cake is moved forward and
gradually pushed into the outer basket from where it
is discharged over its open end into the solids collector
housing and leaves the pusher centrifuge.
12
Washing of the filter cake takes place direct after the
main dewatering zone. Here the washing liquid
displaces the remaining mother-liquid in the gaps of
the filter cake.
The thickness of the filter cake is directly related to
effective step length, the internal friction in the filter
cake and the friction from filter cake on the screen.
The height of the filter cake is 15 – 80 mm.
The capacity of a pusher centrifuge depends in the
first place on the dewatering effect of the mixture. The
newly build filter cake has to be dewatered in the short
time between two pusher movements in such way that
forces are strong enough to move and loosen the
existing filter cake in the basket.
A higher solids concentration in the feed is therefore
of influence for a higher productivity.
Pusher centrifuge SHS 602/690 ZK for dewatering of sodium bicarbonate
13
Construction characteristics
and features
z
Exact separation between pusher-hydraulics
and bearing system
z
Because of the overhung construction
the hydraulic multipath rotation unit
is easily accessible
z
The vertically build-up hydraulic control unit,
that has been mounted on the outside,
has an integrated safety valve
z
Pressure-independent pusher control
by means of limit switches, stroke length
is stepless adjustable
z
Oil pump is submerged but easily accessible
in the basic housing (oilcarter) and therefore
has a low noise level
z
Automatic lubrication of bearings
by means of hydraulic drip oil
z
Absolute secure sealing between drive unit
and process unit
z
No additional oscillating table required
Drive unit (back side)
Oil pump
with hydraulic
control unit
Pusher centrifuges SHS succesfully used for:
ABS Polymerisate
Glaubersalt
Silicon Fluoride
Adipic Acid
Hexamine
Sodium Bicarbonate
Ammonium Chloride
Iron Sulphate Heptahydrate
Sodium Chloride
Ammonium Hydrogen-Carbonate
Melamine
Sodium Formiate
Ammonium Sulphate
Milk sugar
Sodium Phosphate
Chloride Hydrate
NPK-Fertzilizer
Sorbic Acid
Copper Sulphate
Polyacrylate
Tartaric Acid
Dicalcium Phosphate Anhydride
Polyethylene
Zinc Sulphate
Dicalcium Phosphate Dihydrate
Postdewatering of coarse coal sludge
and many more
Dispersion Rubber
and flotation concentrate
Flotation Concentrate and
Potassium Sulphate
residue in the Potassium Industry
Raw Phosphate
Fructose
Rock Salt
14
Sliding Discharge Centrifuge TURBO-CASCADE
Description
This screen centrifuge was developed for dewatering
solids with uniform particles from about 0.2 mm
upwards.
The particles slide individually, not as a compact layer,
over the sieve which, for better dewatering, has been
subdivided into steps or „cascades“. Guide plates
which rotate with the basket carry a mixture of air and
solids direct over the sieve and prevent them from
jumping sieve segments. The solids are subjected to
the centrifugal force for only a very short time but the
surface moisture can, depending on the nature of the
product, be reduced to some tenths of a percent.
In accordance with the requirements and operational
conditions one uses perforated sheet or slot sieves
which, thanks to the special guidance of the products,
are not blinded by pointed particles.
Sliding Discharge Centrifuge
TURBO-CASCADE
used successfully for:
nylon 6
nylon 66
polyester
polypropylen
polystyrene beads
Type
Feed capacity 1)
Drive motor
1)
TC
330
400
520
700
ca. t/h
1.5
3.0
6.0
12.0
ca. kW
5.5
7.5
11.0
22.0
Length
mm
1150
1250
1550
1900
Width
mm
800
800
1450
1800
Height
mm
800
850
1350
1700
Weight
kg
550
650
1250
1800
The actual capacities depend on the properties of the material and their
separation characteristics.
We reserve the right to make changes which serve technical progress.
As a rule the TURBO-CASCADE is gas- or vapourtight
with recirculation into the housing of the circulating air
which is separaten from water in a cyclone. The
dewatered solids are discharged tangentially via a pipe
which can be swivelled in any direction. lf required we
can supply machines for pre-dewatering and for the
removal of coarse particles or agglomerates.
In order not to exceed the capacity of the centrifuge
by unnecessarily large quantities of water, we can,
on request, deliver prethickeners (or static dewaterers).
Sliding discharge centrifuge TURBO-CASCADE C 400 with filtrate
cyclone and air recycle facility.
15
Vibratory Screen Centrifuge HSG
Description
The vibratory centrifuge is, as regards the throughput
of solids, our most effective centrifuge. The transport
of the solids over the sieve in the conically widening
basket takes place by the cooperation between the
inclination and the axial vibration of the basket. A precondition for a controlled sliding speed is that the angle of inclination is somewhat smaller than the slide
friction angle of the product to be dewatered and that
the axial vibration acceleration is sufficient to overcome
the remaining difference in product. Since the vibration
acceleration is kept within relatively narrow limits by
the construction, vibratory centrifuges must, as a rule,
operate with centrifugal forces under 120 g. Therefore
the are used in the first place for coarse or other mass
products which can be easily dewatered such as
washed coal fines, middlings or fine rock in coal
preparation, dissolving and washing sediments in
Potassium preparation, sea salt, concrete sand etc.
in doing so the speed of the generator, in other words
becomes more resonant. This automatically enlarges
the amplitude and the conveying speed of the solids
in the basket. The machine works itself free“, is
therefore self-adjusting, and adapts itself trouble-free
to fluctuations in the feed within a wide range.
The basket and the vibration generator are driven by
3-phase squirrel-cage motors via vee-belts. This
makes it easy to adapt the speed to the operational
conditions. The main motors and the oil container with
pump for the lubrication circuit of all bearings are fixed
to a base-frame which also carries the centrifuge
vibration-free on rubber buffers. Like all our continuous
centrifuges, the vibratory centrifuge can be installed
even on higher storeys without heavy steadying
masses.
Materials of Construction
Construction
Screen basket, inlet pipe, shaft and bearing housing
form the small mass of a vibration system which is
coupled via rubber springs with the large mass, mainly
consisting of a cross member and the product housing.
The vibrations are generated by opposed off-centre
weights in the resonance range somewhat less than
the natural vibration, which requires a very low power
consumption for the Generation of very stable vibration
behaviour. At a higher load of the machine, i.e. increase
of the small mass by agglomeration of product in the
basket, its own vibration figure falls and approaches
16
The profile wires of the wedge wire baskets are made
of chrome steel. The inlet piece as well as the inlet
pipe are made, as required, of wear- and/or corrosionresistant materials. The product housing is made of
carbon steel and can, if required, be delivered with
rubber lining as well as with a special wear protection
in the solids discharge housing.
Standard executions
Type
HSG 800
HSG 1000
HSG 1100
HSG 1200
HSG 1300
HSG 1500
350
t/h
20
50
100
150
180
250
Drive motor
kW
7.5
15
22
30
37
55
75
Length
mm
1500
2070
2200
2400
2400
2900
3950
Width
mm
1270
1650
1900
2000
2000
2230
2610
Height
mm
1200
1425
1650
1770
1770
2040
2340
Weight
kg
1000
2500
3400
3800
3900
7000
9000
Feed capacity
1)
HSL 600
1)
The actual capacities depend on the properties of the material and their
separation characteristics.
We reserve the right to make changes which serve technical progress.
Vibratory
Centrifuges HSG
used successfully for:
Coat:
Lignite
Fine coal
Stock coal
Coarse slurry
Middlings
Shale
Salt:
Vibratory Screen Centrifuge HSG 1500
Flotation tailings
Flotation concentrate
Potash solvent residue
KCL granular crystallisate
Salt of silicic acid
Sea salt
Sand:
Concrete sand
Pumice sand
Ground limestone
Shell sand
Silica sand
Oresand
General:
Wood shavings
5 Vibrating centrifuges type HSG 1200
for dewatering washed fine coal
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Decanter Centrifuges zTS
zTSE zTSS
Description
Often the solids are too fine to be dewatered
satisfactorily in the filtering screen/worm centrifuge.
They can then be separated in solid bowl centrifuges
provided their sedimentation speed in the mother
liquid is sufficient. The sinking speed which is
determined by particle size, particle shape, difference
in density between solids and liquids as well as their
viscosity, can be decidedly improved by conditioning
e. g. by heating or adding flocculation agents.
In decanter centrifuges the clearing of the liquid takes
place in the cylindrical part whereas the dewatering of
the solids by filtration or compression of the filter cake
takes place in the conical part of the bowl. The
geometry of the bowl, especially the relation between
length and diameter, must be adapted to each different application. In most cases good results are
obtained at a length relation of 2: 1, as per our type
TS. For difficult problems e.g. the clearing of waste
water and dewatering very fine slurry a length relation
of about 1: 2.8 as per our type TSE, is required.
Decanter Centrifuges TS 710
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Apart from clearing liquids and dewatering solids,
decanters can also be used for wet classification of
small particles in the range of 1 - 10 microns. By
controlling the flow speed of the liquids between the
worm flights and the centrifugal force, the particle split
is variable in a wide range.
When very low final moistures are required our
Decanter Centrifuges can, in certain cases, be fitted
with a screening area, as per our type TSS. This
execution is generally known as a Screen/Bowl
Centrifuge. The screen portion can be fitted with
segments that are interchangeable without dismantling the centrifuge.
Standard executions
Type
210
300
360
420
500
600
710
850
1000
Drive motor
appr. kW
5,5 - 11
10 - 22
18,5 - 30
18,5 - 45
22 - 50
30 - 90
45 - 110
55 - 160
120 - 200
Length
TS
appr. mm
1400
1900
2020
2200
2650
2900
3300
3500
4570
Length
TSE
appr. mm
1700
2200
2380
2620
3150
3500
4010
4000
5370
Length
TSL
appr. mm
2000
2500
2740
3040
3650
4100
4720
5200
6570
Width
TS,TSE,TSL appr. mm
1100
1370
1500
1750
2035
2060
2580
2700
3160
Height
TS,TSE,TSL appr. mm
750
940
980
1110
1325
1400
1450
1600
1660
Weight TS
appr. kg
900
1200
1500
2100
3000
4200
5000
7000
10000
Weight TSE
appr. kg
1200
1400
1800
2450
3500
5000
6000
8300
12000
Weight TSL
appr. kg
1400
1600
2100
2800
4000
5800
7000
9800
15000
The actual capacities depend on the properties of the material and their separation characteristics.
We reserve the right to make changes which serve technical progress.
Construction
Special executions
Our decanters work according to the so-called countercurrent principle. The suspension is fed in about the
middle of the bowl where the separaten solids are
conveyed into the direction of the small diameter
through the worm, which runs at a speed different from
that of the bowl, whereas the cleared liquids flow over
the opposite end. The level of the liquid in the bowl
and thus the relation between wet and dry part is
adjustable within wide limits. This enables an optimum
adaption of the machine to the separation problem.
z
The speed differential between bowl and worm is
produced via Cyclon-gears which have been designed
for many years of trouble-free continuous operation.
By selecting the right gear ratio and, where necessary,
by changing the speed of the eccenter shaft which is
driven by a vee-belt, the speed differential is adapted
as required. The centrifuge is driven by a standard
3-phase squirrel-cage motor via vee-belts so that the
speed of the basket can also be adapted easily to the
conditions.
In order to restrict operational costs and wear, the
speed of the bowl should be as low as possible i.e.
must be only as high as absolutely necessary for the
separation. In many cases e.g. when using flocculation
agents, lower speeds also give better processtechnical results.
z
z
z
z
z
z
z
z
z
z
z
Sealing of housing by means of:
Gas Labyrinth
PTFE seals
Sliding ring seal
Overhung rotating parts
CIP cleaning
Friction drive for CIP cleaning
Filtrate cyclone
Filtrate scoop discharge
3 Zone separation
Flocculation facility
Solids mixer
Discharge device
Variable differential speed either hydraulically
or mechanically operated
Drive motor above centrifuge
Materials of Construction
The contact parts are made from Austenitic Steel,
special Bronze, Hastelloy, Nickel, Titanium or similar
depending on the application. With abrasive materials,
the vulnerable zones are protected by abrasion
resistant materials.
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Accessibility of rotating assembly
The bowl in our decanters types TS and TSE rests via
roller bearings in bearing shields which are attached
to nontwisting product housings.
After loosening some bolts the rotating parts can be
slid horizontally out of the housing with the help of the
supplied rails, and swivelled into a vertical position.
Often the bowl remains in the housing and only the
worm is taken out, as described above, for cleaning
and/or inspection. Product housing, oil Container for
the lubrication of bearings and gear unit as well as the
main motor are fixed to a common base-frame.
Decanter Centrifuges TS used successfully for:
Animal fats
Graphite
Polyvinylalcohol
Animal waste
Greaves
P.V.C.
Aluminium-alkali
lron Hydroxide
Residue of potash production
Barium carbonate
Lead sulphate
Soya milk
Blearbonate
Methylcellulose
Silver nitrate
Biphenol
Mica
Sodium carbonate
Calcium Carbonate
Milk sugar
Sodium Pyrosulphite
(Powdered marble)
Nickel Formiate
Strontium carbonate
C.M.C.
Pearlpolymerisate
Uranium ore
Flotation concentrates
Polyethylene
Vitriol of Copper
Flotation rocks
Polystyrene
Waste water
Foundry releasing powder
Polyvinyacetyl
Zinc chromate ...and many more
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2 Decanter centrifuges type TS 420 E for the separation of lactose
Decanter centrifuges type TS 420 E, some with motor mounted above machine to save space, some in normal execution (workshop picture)
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Universal Centrifuge for laboratories and technical
For the continuous, mechanical liquid/solids separation
we use either screen centrifuges or decanter
centrifuges depending on the physical characteristics
of the feed material.
For laboratories and technical establishments we have
developed the „Universal Centrifuge“ which can be
equipped either with a screen basket or a solid bowl.
This machine can be supplied in two sizes. Bearings,
gear box to produce differential speeds, motor and
drive form an integral unit.
The speed is controlled through vee belt pulleys or via
a variable speed gear box. The overhung screen
baskets or solid bowls are easily interchangeable.
Type
H 200 /
TS 140 F
H 250 /
TS 210 F
Drum Ø
a) decanter:
mm
140
210
b) screen:
mm
200
250
Motor:
kW
3.0
5.5
a) with solid bowl:
kg
200
550
b) with screen:
kg
230
560
Length:
mm
Width:
mm
680
820
910
1050
Height:
mm
570
800
Weight:
Partial view of our test facility
at Weseler Straße, Mülheim an der Ruhr
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Our head office
at the Raffelbergpark
in Mülheim an der Ruhr
Our works premises
in the industrial port
in Mülheim an der Ruhr
Partial view
of our workshop
in Mülheim an der Ruhr
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