krauss-maffei peeler centrifuge hz - equipnet · pdf fileamino acids, antibiotics, bleaches,...
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Krauss-Maffei Peeler Centrifuge HZPerformance you can rely on
Amino acids, antibiotics, bleaches,
citric acid, pesticides,
pharmaceutical intermediate
products, salicylic acid, tensides,
vitamins, etc.
Whether they are applied in the chemicals, pharmaceutical
or food industry Krauss-Maffei peeler centrifuges have
always proved their worth. They are ensured by reliable
operation and high performance.
Peeler centrifuges are discontinuously operating filtration
centrifuges. The rotor is of horizontal design with cantilever
mounting. The centrifuges can be fitted with conventional
filtration baskets or with baskets featuring a special rotary
siphon.
Modern controls and instrumentation enable result-oriented
operation. Peeler centrifuges can be optimised to meet the
varying processing requirements.
Highest performance Application fields
Peeler centrifuges are used wherever solids of varying kinds
are to be separated from a slurry by means of filtration.
Krauss-Maffei Peeler Centrifuge HZ
2
Examples
Bulk chemicals
Fine chemicals and
pharmaceutical products
Plastics
Bromides, chlorides, fluorides,
sulfur, etc.
ABS, antioxidants, melamine,
resins, etc.
Foodstuff:
Spectrum of use
Solids concentration of the
slurry to be separated
Throughput of solids
Starch, sweeteners, etc.
Average particle size:
5-500 µm
from 3.0 % wt
up to 15 t/h.
Krauss-Maffei Peeler Centrifuge HZ 180/7,1
3
Your advantages
Low residual moisture
High level of flexibility
Excellent washing results
In peeler centrifuges with rotary siphon
based on high rotational speeds.
Peeler centrifuges can be excellently adapted to meet
the process engineering requirements. By using
variable speed drives, for example, and result-oriented
control systems such as thermal feed controllers
or ultrasonic feed controllers.
Exact metering of the wash liquid through the feed
pipe or separate wash pipe.
Besides the filtration basket KMPT also offers baskets
with rotary siphon. These provide significant advantages
during the operation of the centrifuge:
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Increased filtration capacity
High degree of product purity
By creating a vacuum beneath the filter media In
addition to the increased filtration pressure
results in an improved filtration rate.
By controlling the flow rate the contact time between
wash liquid and solids can be prolonged.
Prolonged service life of residual heel:
Increase in performance, avoidance of
drop in performance
Regeneration of the residual heel by mean of
backwashing.
Imbalance is avoided during the feed process - also
during the feed of very fast filtering media – through
a partial increase in the filtration resistance. As a result
of this the individual batch times are shorter and the
overall performance is enhanced.
Your advantages
Krauss-Maffei Peeler Centrifuge HZ 180/7,1 in starch production
WashingFeeding
Filtration
Washing
The main filtration commences with the feed procedure.
It is completed when the slurry immerses in the filter cake.
Washing of the cake frequently takes place after the
main filtration. For this purpose a wash liquid is fed
into the basket via the feed pipe, or, with low washing
conditions, the liquid is introduced through a wash pipe.
The level of the wash liquid is controlled by the feed
controller during the filling process. The washing filtration
is completed when the wash liquid immerses into the
filter cake.
Operation
Advancement in control and instrumentation allows a
flexible and result-oriented operation of the discontinuous
filter centrifuges. For applications in the chemicals and
pharmaceutical industry the individual cycle times for feed,
filtering, washing and peeling vary from just a few minutes
to several hours. The individual process steps are flexibly
adapted to the prevailing conditions.
Operation
4
Feeding
During the feed process the slurry is fed into the centrifuge
basket via the feed distributor. In most cases this process
is interrupted several times to prevent suspension from
flowing over the basket rim. The feed level is measured by
a feed controller, either mechanically or contact-free using
ultrasonic device, for example. Normally the basket is filled
to approx. 75-85% of the height of the basket rim. The
process is completed when the filter cake has reached the
desired level.
Dry spinning
At the end of the wash process the centrifuge is accelerated
to top speed. The spinning process continues until the
desired residual moisture of the filter cake is attained.
Filtration basket
Siphon basket
Dry spinning
Backwashing
Hydraulic
Peeling
Filtration basket:
The peeler knife is swung in to the filter cake which it then
peels. The peeled filter cake falls into the solids shaft and
is either discharged via a discharge chute or is removed by
means of a screw conveyor. A thin layer of the filter cake
remains in the basket to protect the filter media. This layer
is called the residual heel and is used as additional filtering
means. If the residual heel becomes displaced, it can either
be regenerated by backwashing or it can be removed using
pneumatic or hydraulic means.
Krauss-Maffei peeler centrifuges are fitted with different
basket types. The most common variants are the filtration
basket and the special KMPT design of the siphon basket.
Once the filtrate has passed through the filter cake and
the filter media it is discharged out into the filtrate housing.
Siphon basket:
Backwashing
The mode of operation of the centrifuge with rotary siphon
is similar to that of a centrifuge with conventional filtration
basket. However in this case, the filtrate is not spun into
the filtrate housing after passing through the filter media.
The filtrate is fed to the siphon chamber through channels
in the basket rear wall. A siphon skimming pipe removes
the filtrate from the siphon chamber. An additional filtering
pressure is generated, caused by the difference in the
level between filter media and the siphon chamber.
This provides a more efficient filtration.
The siphon basket makes it possible to feed backwash
liquid into the siphon chamber and thus permeate the
residual heel from below. This process restores the
required permeability of the residual heel.
The liquid conducted into the basket through the
backwash process is also used to help distribute the
new slurry feed. The resulting uniform distribution of
the charged solids reduces feed imbalance significantly.
Different basket designs
Different basket designs
Pneumatic
Filtration basket
Siphon basket
Peeling 5Residual heel removal
In the two processes the residual heel is gently removed from
the filter media with low wear and at low rotational speed of
the centrifuge and then removed from the process area by the
peeler knife. The disadvantage of reslurrying during the hydraulic
cleaning of the residual heel is offset by the significant cleaning
of the centrifuge after this step. It has to be decided which form
of residual heel removal is most suitable and this depends on
the respective application.
The peeling device is used to peel the solids present in the
centrifuge in the form of a filter cake and to deliver them to
the solids discharge.
Krauss-Maffei peeler centrifuges are fitted with broad peeler
knives. These do not require any additional axial movement to
the pivot motion. The advantage of this being that axial sealing is
not required. Broad peelers ensure a uniform discharge of the
solids in one direction only and with low dispersion.
The peeling device and the product discharge form one unit.
The drive is by hydraulic means and the feed rate can be
regulated.
Solids peeling devices
Residual heel removal
The residual heel left in the centrifuge becomes
increasingly compressed as the number of batches
progresses. This is due to the portion of fine particles
resulting from particle degradation during the peeling
process. If siphon baskets are not used or the residual
heel generation through backwashing is no longer
effective, the residual heel has to be removed regularly.
There are two procedures used to remove the residual
heel according to mechanical principles:
The residual heel in the basket is blown off by
compressed air or nitrogen applied through a
pivot-mounted nozzle assembly.
A large quantity of rinsing liquid is fed into the
centrifuge via the feed pipe within a short period
of time. The shearing load of the rinsing liquid
causes the residual heel to disperse.
Pneumatic residual heel removal
Hydraulic residual heel removal
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Residual heel removal
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Installations
7
The peeler knife can be replaced as a wearing part and is
designed in several parts to facilitate maintenance.
There are two systems available for the removal of the
peeled solids:
The peeled product drops through the discharge shaft
into the chute. The product slides out over the transverse
sliding surfaces.
The peeled product is delivered to the outside by means
of a screw conveyor.
Advantages of conveyor screws are:
Higher throughput as a result of using wide baskets
Wide spectrum of use because products with greater
adhesion tendency and higher adhesion factor can
also be discharged.
Solids discharge
Discharge chutes
Conveyor screw
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Solids discharge
Arrangement/Foundation
The centrifugal forces produced by the rotation of the basket
are used to separate the solids from the liquid. If the product
is not uniformly distributed in the centrifuge basket imbalance
may develop. To keep the dynamic load exerted on a building
to a minimum vibration-insulated installation is used out. This
is implemented by installing the centrifuge on a concrete or
steel block which is mounted on spring-damper elements.
Important guidelines for installation are:
The feed pressure should be approx. 0.5 bar
Keep all supply pipes as short as possible
Install all supply and discharge pipes with a maximum
gradient
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Installation on concrete block
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Provide sight glass in the pipes
Ensure fast emptying of all pipes, e.g. through venting
or compensation pipes in closed systems
Solids discharge to be of vertical downwards
arrangement without cross-section restriction
All pipes to be of a flexible design
The following parameters are detected continuously to
allow optimum peeler centrifuge operation at maximum
output and with uniform product properties:
Level in the basket
Filtration rate
Liquid immersing point in filter cake
Result-oriented control
Result-oriented control
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The detected measurements are evaluated by the control
electronics and the process parameters, such as feed time,
dry spinning time, wash time etc. are optimally adapted. The
control is implemented as a result-oriented basis.
There are two main measuring processes which have proved
their worth in the technical application:
The measuring sensor of the TFKR which is retracted and
extended at regular intervals touchs the surface of the slurry,
the wash liquid or the solid analyses for a short time. The
electronics evaluates the signals and analyses.
Advantages of the TFKR are:
Determination of filtrate immersing point: based on the
varying frictional heat the TFKR can differentiate between
the surface of a liquid and a solid surface.
More precise measurement: in comparison with the
mechanical feed controllers the immersing frequency
and duration can be freely selected.
Thermal feed controller (TFKR)
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Thermal feed control sensor ultrasonic feed controller
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Ultrasonic feed controller (UFKR)
The ultrasonic measurement is a contact-free measuring
system. An ultrasonic sensor emits a measuring signal
in the direction of the product in the basket. The
ultrasonic signal reflected by the product is picked up
by a sensor and evaluated by the control electronics.
In multiple purpose production plants and with changing
solvents it is necessary to carry out a reference
measurement based on the different sound velocity.
The patented system of KMPT offers the following
advantages:
No mechanical contact with the product, no
splashing and dust development
No wear of the sensor and consequently no
contamination of the product with abrasive
metal particles
No dynamic seals
Smaller equipment installations in the machine
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Engineered Systems
For optimal operating results with peeler centrifuges these
machines must be adaptable to the upstream and
downstream plant equipment. Individual designs also
involve high engineering expenditure. KMPT has developed
basic modules for the major, equipment-specific basic functions.
This enables the provision of optimal functions at a low cost.
The scope of our offer is tailored to meet your specific
requirements.
Engineered Systems
Krauss-Maffei System with peeler centrifuge
Stepless level detection ■
Dimensions and weights
10
HZ 25/0,1HZ 25/0,1 250250 125125 2,52,5 0,100,10 22002200
HZ 40/0,2HZ 40/0,2 400400 200200 9,89,8 0,250,25 20002000
HZ 63/0,3HZ 63/0,3 630630 160160 20,620,6 0,320,32 17001700
HZ 63/0,6HZ 63/0,6 630630 315315 40,540,5 0,620,62 20202020
SizeSize
40004000
30003000
22002200
24002400
HZ 80/1,3HZ 80/1,3 800800 500500 103,7103,7 1,261,26 16001600
HZ 100/1,6HZ 100/1,6 10001000 500500 164,0164,0 1,571,57 12901290
HZ 125/2,5HZ 125/2,5 12501250 630630 323,6323,6 2,462,46 10301030
HZ 125/3,2HZ 125/3,2 12501250 800800 410,9410,9 3,143,14 10301030
19001900
15201520
12201220
12201220
HZ 80/1,0HZ 80/1,0
HZ 160/4,0HZ 160/4,0 16001600 800800 683,6683,6 4,024,02 805805
HZ 160/5,0HZ 160/5,0 16001600 10001000 854,6854,6 5,035,03 805805
HZ 180/7,1HZ 180/7,1 18001800 12501250 1350,01350,0 7,077,07 710710
950950
950950
840840
800800
HZ 100/2,0HZ 100/2,0 10001000
400400
630630
83,083,0
206,6206,6
1,011,01 16001600 19001900
1,981,98 12901290 15201520
[mm]
Basket inside Basket inside diameterdiameter
[mm]
Basket Basket lengthlength
[mm][mm]
CapacityCapacity
[l][l]
Filter AreaFilter Area
[m[m
C-value C-value )
[xkg][xkg]
1)1MaximumMaximum
SpeedSpeed )
[rpm][rpm]
1 )1
1) Density of saturated filter cake 1250 kg/m³, at T = 50 °C, Material 316 L
When using special materials it is possible to exceed the maximum speeds or C-values.
All data are non-binding
HZ 25/0,1HZ 25/0,1 670670 500500 550550 10001000 11001100
HZ 40/0,2HZ 40/0,2 810810 720720 750750 15001500 13001300
HZ 63/0,3HZ 63/0,3 17001700 11001100 11001100 36003600 30003000
HZ 63/0,6HZ 63/0,6 18001800 11001100 11001100 37003700 30003000
l[mm]
l[mm]
b[mm]
b[mm]
h[mm]
h[mm]
14001400
18001800
18001800
18001800
HZ 80/1,3HZ 80/1,3 24002400 14001400 13001300 47004700 35003500
HZ 100/1,6HZ 100/1,6 26002600 16501650 16001600 52005200 38003800
HZ 125/2,5HZ 125/2,5 30003000 19001900 18001800 59005900 47004700
HZ 125/3,2HZ 125/3,2 34003400 19001900 18501850 63006300 47004700
25002500
30003000
35003500
35003500
HZ 80/1,0HZ 80/1,0
HZ 160/4,0HZ 160/4,0 35003500 23002300 22002200 67006700 56005600
HZ 160/5,0HZ 160/5,0 40004000 23002300 23002300 72007200 56005600
HZ 180/7,1HZ 180/7,1 46004600 30003000 30003000 86008600 66006600
44004400
45004500
53005300
21002100
HZ 100/2,0HZ 100/2,0 28002800
14001400
16501650
13001300
16001600
43004300 35003500 25002500
54005400 38003800 30003000
7575
500500
12501250
13501350
160160
13501350
28002800
35003500
30003000
35003500
55005500
70007000
73007300
1200012000
1500015000
1900019000
1000010000
1300013000
2350023500
3100031000
3600036000
5570055700
26002600 60006000
41004100 1250012500
L[mm]
L[mm]
B[mm]
B[mm]
H[mm]
H[mm]SizeSize
WeightWeightWithout Without motormotor [kg] [kg]
Weight with Weight with vibration blockvibration block
and driveand drive[kg][kg]
H
l
h
b
B
L
Dimensions
11
Worlwide company locationsand representative offices
KMPT AG
Industriestraße 1-3
85256 Vierkirchen
Phone: +49 (0) 8139 80299 - 0
Fax: +49 (0) 8139 80299 - 952
www.kmpt.com
Europe
KMPT France S.A.S.
KMPT Italia s.r.l.
KMPT UK Ltd.
L´ESPACE MEDIA
3, rue Gustave Eiffel
Le Technoparc
78306 Poissy Cédex
France
Phone: +33 1 39 22 64 37
Fax: +33 1 39 22 39 92
www.kmpt.com
Via Ripamonti, 129
20141 Milano
Italy
Phone: +39 02 57 43 01 1
Fax: +39 02 56 81 42 58
www.kmpt.it
Gemini Business Park
Europa Boulevard
Warrington WA5 7TR
Great Britain
Phone: +44 19 25 64 41 55
Fax: +44 19 25 57 34 35
www.kmpt.co.uk
Worldwide
KMPT USA Inc.
KMPT AG
Beijing Representative Office
KMPT AG
Liaison Office Indien
Representative office of
KMPT AG in St. Petersburg
8070 Production Avenue
Florence, KY 41042
USA
Phone: +1 859 547-1100
Fax: +1 859 547-1098
www.kmpt.net
Air China Plaza 2109
36# Xiao Yun Road
Chaoyang District
100027 Beijing
China P.R.
Phone: +86 10 84 47 58 80
Fax: +86 10 84 47 58 83
www.kmpt.com.cn
304, Dheeraj Kawal,
L.B.S.Marg, Vikhroli(W)
Mumbai 400 079
India
Phone: +91 22 25 79 51 34
Fax: +91 22 25 79 51 35
www.kmpt.com
190031 St. Petersburg
Russia
Phone: +7 81 24 41 36 73
Fax: +7 81 24 41 36 74
ul. Efimova 4a, Lit. A, Office 317
Global network of sales and service partners.