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

6

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

8

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

9

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

marketing@kmpt.com

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

roger.fritz@kmpt.fr

www.kmpt.com

Via Ripamonti, 129

20141 Milano

Italy

Phone: +39 02 57 43 01 1

Fax: +39 02 56 81 42 58

kmpt@it.kmpt.com

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

info@kmpt.co.uk

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

sales@kmpt.net

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

yang@kmpt.com.cn

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

j.ganesh@kmpt.in

www.kmpt.com

190031 St. Petersburg

Russia

Phone: +7 81 24 41 36 73

Fax: +7 81 24 41 36 74

nikolai.kamaev@kmpt.ru

ul. Efimova 4a, Lit. A, Office 317

Global network of sales and service partners.