Product Brochure www.pfister.de Product Brochure Rotor Weighfeeder Pfister FRW / SRW Highly accurate and reliable gravimetric feeding of pulverised fuel Whether kiln feeding, additive feeding to the raw or finish mill or cement pre-loading, the robust design of the Pfister FRW is ideal for dosing powdered bulk materials such as raw meal, fly ash, bypass dust or cement products with high dosing constancy and precision. Due to the integration of weighing and dos- ing the system is easy to operate and thus extremely reliable. Pfister FRW + ProsCon®: the innovative solution for metering powdered materials.
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Product Brochure
www.pfister.de
Product Brochure
Rotor Weighfeeder Pfister
FRW / SRW
Highly accurate and reliable gravimetric feeding of
pulverised fuel
Whether kiln feeding, additive feeding to the raw or finish mill or cement pre-loading, the robust design
of the Pfister FRW is ideal for dosing powdered bulk materials such as raw meal, fly ash, bypass dust or
cement products with high dosing constancy and precision. Due to the integration of weighing and dos-
ing the system is easy to operate and thus extremely reliable.
Pfister FRW + ProsCon®: the innovative solution for metering powdered materials.
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History
FLSmidth Pfister has more than 110 years of
experience in manufacturing industrial weigh-
ing equipment and is part of the FLSmidth
group since 1998.
The Rotor Weighfeeder technology was invented
by FLSmidth Pfister in 1984 to feed pulverised
coal to the cement burning process and it is
now time tested and state of the art technol-
ogy. More than 1,700 systems are in operation
world-wide.
Out of the long experience, FLSmidth Pfister
developed the Pfister FRW for non-explosive
pulverised material. Since the first installation
in 1997, more then 200 systems have been
installed world-wide for different applications
and materials.
How does the system work?
What are the benefits?
What are the dimensions?
How ist the system installed?
What are the technical facts?
Is there further information?
Pages 3-4
Pages 5-7
Page 8
Pages 9-10
Page 15
Page 16
All Pfister weighfeeders are
Engineered
Designed
Assembled
Tested
in Augsburg—Germany
The usual applications kiln feed
cement blending
mill feeding (fine grained materials)
General Principle
The Pfister FRW is used for extracting fine
grained bulk material out of a storage silo and
feed it with high accurate feedrate on an
airslide or any other transport media.
The usual bulk materials raw meal
cement
fly-ash
slag
additives
other fine or pulverised materials
What applications are there? Pages 11-14
Mill feeding and Kiln feeding. The application for rotor weighfeeder FRW.
Historic Pfister scale. Ludwig Pfister,
founder of the company in 1894.
Contend
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The Function Principle
The pulverised material is transported in
the chambers of the rotor wheel (1) inside
the feeder from the inlet (2) towards the
outlet (3) . At the outlet, the chambers are
completely emptied. The rotor is driven by
a variable speed drive (4) . The rotor hous-
ing (5) cover the rotor and provides a com-
pletely closed and dust tight system. It is
suspended on a eccentric weighing axis (A-
A) through the middle of inlet and outlet.
The third point is suspended with a tow-
bar (6) at a load cell which weighs the gra-
vimetric bulk material content inside the
rotor. That means that the rotor weigh-
feeder measures real kilograms and is
therefore a true scale. At the outlet, the
material falls out of the feeder by gravity.
The gravimetric measuring value provides infor-
mation on the bulk material mass in the rotor
weighfeeder before the material leaves the
feeder. The loading of the rotor in relation to
the angular section is stored by the weighing
electronics. The speed of the rotor is controlled
inverse to the loading of the rotor at the outlet.
The Weighing Electronics ProsCon®
The electrical controller calculates the required
speed of the motor for the time of the dis-
charge. It uses the set feedrate and the meas-
ured bulk material mass for the calculation of
the angular speed of the rotor (see chart). Less
material in the rotor results in a higher angular
speed, more material in a lower speed.
With this principle, so-called prospective control
pre-bin bulk material extraction devices, 5: bulk material
dosing with Pfister FRW.
2
1
3 4 5
Installation of Pfister FRW with material extraction devices star-feeder or flow-control gate. - Star-feeders for feedrates between 0 t/h and maximum 30-35 t/h. - Flow-control gates start from feedrates of minimum 3 t/h.
star-feeder
flow-control gate
How ist the system installed?
Installation
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Installation of three Pfister SRWs for online cement blending. In this special case it is not necessary to use a pre-feeding device because of small feedrates.
Pfister SRW in the cement blend-ing installation. In this case without pre-feeding device, the feeder is directly extracting out of the bulk material silo. .
Cement Blending
Pre-ground clinker
Fly ash Limestone meal
Installation
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Application for Kiln-Feed at a Cement Plant in Romania
Sales Department: [email protected] Technology Department: [email protected] Service Department: [email protected] Transweigh India Ltd. 124, ABCD, Govt. Industrial Estate Kandivli (W) Mumbai - 400 067 India T. + 91 22 2868 2311 F. + 91 22 2868 2145 [email protected] FLSmidth Pfister GmbH China Western Part of Songshan Road Qingdao Airport Industrial Zone Chenyang District 2661g09 Qingdao P. R. China T. +86 532 877 60380 F. +86 532 877 56852 [email protected]
FLSmidth Pfister GmbH Staetzlinger Str. 70 86165 Augsburg Germany T. +49 821 7949 0 F. +49 821 7949 524 www.pfister.de Branches offices & joint ventures FLSmidth Pfister Inc. 2158 Avenue C, Suite 201 Bethlehem, PA18017-2148 U.S.A. T. +1 610 2645110 F. +1 610 2645537 [email protected] FLSmidth Pfister Ltda. Rua Vigário J.J. Rodrigues, 905 - c.j. 51 13.201 - 490 Jundiai S.P., Brazil T. +55 11 45266744 F. +55 11 45875711 [email protected] FLSmidth Pfister GmbH Malaysian Branch C-3A15, Centre Wing Metropolitan Office Suite Metropolitan Square, Jalan PJU 8/1 Damansara Perdana 47820 Petaling Jaya Selangor Malaysia T. +60 3 7728 2039 F. +60 3 7727 2039 [email protected] FLSmidth Pfister GmbH 6, Rue de Bretagne 38070 St. Quentin Fallavier France T. +33 474 955544 F. +33 474 945075 [email protected]