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Product Brochure Belt Weighfeeder Pfister ® BWF + Apron Weighfeeder Pfister ® AWF The robust systems you can rely on Watch here how belt weighfeeder Pfister ® BWF works!
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Product BrochureBelt Weighfeeder Pfister® BWF + Apron Weighfeeder Pfister® AWF
The robust systems you can rely on
Watch here how belt weighfeeder Pfister® BWF works!
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Dosing and feedingfor industrial production
Raw Mill FeedingPfister® TRWPfister® BWF Pfister® AWF
Coal Mill FeedingPfister® TRW-K
Finish Mill FeedingPfister® URWPfister® BWF Pfister® AWFPfister® TRW
Cement BlendingPfister® FRW/Pfister® URW
Alternative Fuels FeedingPfister® TRW-S/D
Bulk Material Pre-LoadingPfister® VRW
Pfister® feeding and dosing devices exemplary in the cement production process:
Kiln FeedingPfister® FRW
Pulverised Fuel FeedingPfister® DRW
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FLSmidth Pfister has almost 120 years of experience in manufacturing of industrial weighing equipment. It has been member stock quoted FLSmidth Group/Denmark since 1998.
The patented rotor weighfeeder was invented by Pfister in 1984 to feed pulverised fuels for the cement burning process. This state-of-the-art dosing device has proved its properties in more than 2,500 installations worldwide. FLSmidth Pfister additionally supplies know-how for equip-ment, related to the coal feeding process in order to ensure problem-free material handling and optimal pneumatic transport of the coal.
Fuels have a wide variety of material characteristics. Thus, FLSmidth Pfister helps to design individual installation solutions.
Pfister® weighfeeders are
- engineered - designed - assembled - tested
with the experience of almost 120 years.
German Ludwig Pfister founded the company in 1894Above: Historic scale
Tradition & progress
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Functioning principleof belt weighfeeders Pfister® BWF
The picture below displays a belt weighfeeder Pfister® BWF: Material is extracted out of the material silo and fed into the infeed hoppers. The conveyor belt transports the material over the weighing bridge where a controller regulates the speed of the belt inverse to the momentary load. From there the material is discharged into the further processes, for example cement mill feeding.
Belt weighfeeders Pfister® BWF are controlled by controller Pfister® iDD. The control is mounted at the frame of belt weighfeeder Pfister® BWF which makes an electrical control cabinet obsolete. Alternatively a cabinet solution with gravi-metric dosing controller Pfister® GDC is available.
Prospective Control ProsCon®: Advanced Weighing ElectronicsThe electronic controller calculates the required speed of the motor for the time of the discharge. It uses the set feed
rate and the measured bulk material mass to calculate the speed of the belt. Less material on the belt results in a higher speed, more material in a lower speed.With this pro-active principle, the prospective control ProsCon®, belt weighfeeders Pfister® BWF achieve highly stable short- and longterm accuracy.
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Customer benefits of belt weighfeeders Pfister® BWF
Dimensions of belt weighfeeder Pfister® BWF (with exemplary V-infeed hopper):BB: belt width, AA: pulley center distance, EA: inlet to outlet distance, W: infeed hopper width, L: infeed hopper length
BB
W
EA
AA
optional hammer gate
L
High flexibility- Modular design with a large variety in lengths and widths can be adapted optionally- Different types of inlet chutes guarantee excellent silo extraction for a variety of material properties- Feed rate adjustment (t/h) in a range of up to a turn down ratio - 1:10
Easy maintenance- Lifetime lubricated idler- Easy calibration and adjustment of zero point
High reliability - Belt and pulley strippers ensure no dirt is sticking to the rollers or to any side of the belt- Spherical v-grooved machined pulleys for optimal belt guidance
High accuracy- Advanced belt tensioning by tension roller which supports highest feeding accuracy - Digital tachometer (incremental encoder). This results in accurate values for the controller to calculate the needed speed of the motor- Impressive feed rate accuracy
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Structure of the dosing system: Gravimetric Dosing Controller Pfister® GDC
Pfister® gravimetric dosing controller was es-pecially developed to guarantee high dosing precision for gravimetric belt feeder Pfister® BWF and Apron weighfeeder Pfister® AWF
The microprocessor-controlled Pfister® gravimetric dosing controller works with a 16 bit processor and offers the following main features:
• configurable functionality of inputs & outputs• field-programmable logic controller can quickly
implement features required on the field• 7’’ touchscreen colour display HMI• optional field interface module through CAN
communication network for reduced cable cost
Mill feeding control Pfister® MUR
• variable frequency drive• integrated multiple microprocessors,
which allow true parallel processing• Memory on EEPROM basis and a battery
backup RAM with inbuilt real time clock (RTC)• 16 digital inputs and 16 digital outputs as well
as 3 analog inputs and 3 analog outputs• Support of Modbus and Profibus protocols
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Belt weighfeeder Pfister® BWF Highly accurate and reliable feeding
For all kinds of continuously operated processes
Belt weighfeeder Pfister® BWF is espe-cially suited for dosing nearly all kind of bulk materials. It proves its reliabil-ity and performance day by day. The modular design with its large variety in lengths and widths allows an adaption to nearly all applications.
High Reliability: - Belt guiding devices make sure the belt runs in the middle of the rollers and idlers - Belt and pulley strippers make sure no dirt sticks to the rollers or to the belt- Spherical machined pulleys for optimal belt guidance- Compact controller with prospec- tive control ProsCon® mounted in a cabinet at the feeder’s frame or as an onsite solution
High Accuracy:- Advanced belt tensioning device guarantees stable tension of conveying belt- Digital tachometer measures the variable speed drive with a digital tachometer (incremental enco- der). This results in accurate values for the controller to calcu- late the necessary motor speed- Monitoring of belt drift / belt slip by a proximity switch. This infor- mation is also used for calcula- tion of the needed motor speed.- Very high feed rate accuracy
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Application fields: All continuously operated processes
Material: Bulk materials such as limestone, iron ore, clinker, sand, gypsum, raw coal, clay etc.
Feeding capacity: from a few 100 kg/h up to 1,500 t/h (higher capacities on request)
Design example: - Various infeed hoppers with shut-off devices - Belt weighfeeder Pfister® BWF - Discharge hood - Spillage conveyor (optional) - Temperature resistant belts (optional) - Cold climate package (optional)
Features: - Stable material dosing - Outstanding reliability - High short- and longterm accuracy - Compact, robust machinery - Large variety in lengths and widths - Large feeding range - Easy to maintain
Dosing control: - Gravimetric dosing controller Pfister® GDC - Prospective control ProsCon®
- User oriented interfaces
Certificates: ISO 9001
Technical factsof belt weighfeeder Pfister® BWF
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Raw mill feeding at a cement plant
At this cement plant old belt weighfeeders (see picture to the right) were replaced by state-of-the-art belt weighfeeders Pfister® BWF to feed lime stone at a rate of 40 t/h (see picture below).
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Cement mill feeding
At this cement plant belt weighfeeders Pfister® BWF handle the complete cement mill feeding with- clinker at a feed rate of 80 t/h- gypsum at a feed rate of 15 t/h and- additives at a feed rate of 5 t/h
Old belt weighfeeders from the 1970ies (see picture on the right above) were replaced by three modern belt weighfeeders Pfister® BWF.
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Iron ore and coal feeding at a sinter plant
After extraction from the vibrating hopper iron ore or coal is dosed by belt weighfeeders Pfister® BWF onto a collecting belt to feed a sinter plant at a feed rate of 180 t/h.
Coal feeding at a coke plant
At these two coke plants coal is fed onto a collecting belt by belt weighfeeders Pfister® BWF at a feed rate of 180 t/h (picture on the left) and at 350 t/h (picture on the right).
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Application in minerals dosing
These belt weighfeeders Pfister® BWF were designed and assembled for application in a minerals plant. Dosed materials are petcoke, limestone and phosphate cake with feed rates up to 850 t/h.
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Raw mill feeding
At this cement plant belt weighfeeders Pfister® BWF feed limestone into the raw mill at a feed rate of 120 t/h. An extra long infeed hopper and a belt length of 16 meters (see picture to the right) were realized.
note: extra long belt with 16 meters!
Belt weighfeeder Pfister® BWF for iron ore with a vibrating chute
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FLSmidth production facilities in Bawal/India
Based on the more than a century long experience of the German engineers at the FLSmidth Pfister headquarters in Germany, gravi-metric belt feeders Pfister GBF are engineered, designed and assembled at the brand new FLSmidth produc-tion facilities in Bawal/India.
Assembly workshop forbelt weighfeeders Pfister® BWF in India
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Assembly Workshop forbelt weighfeeders Pfister® BWF in India
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Gravimetric belt feeder Pfister® GBF: Highly accurate and reliable coal feeding in the Power Industry
For dosing crushed coal to pulver-izers in firing processes
Gravimetric belt weighfeeder Pfister® GBF is especially designed for feeding crushed coal to pulverizers in the boiler firing process in the power industry.
Gravimetric belt weighfeeder Pfister® GBF mainly replaces old volumetric feeders to improve a constant material feeding into the firing process. Due to its precise gravimetric dosing the coal fired boilers can be operated more stable, less access air is required and the efficiency of the boilers increased.
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Functioning principle ofgravimetric belt feeder Pfister® GBF
The picture below displays a gravimetric belt feeder Pfister® GBF and its weighing and dosing principle: Crushed coal is extracted out of the material silo and fed into the infeed hoppers.
The gravimetric belt feeder Pfister® GBF consists of a conveyor belt with integrally moulded side skirting which is equipped with moulded V guide at the bottom of the carrying side ensuring no swaying of the belt, thus maintain-ing accuracy. A belt scraper scrapes coal off the top surface of the conveyor belt. Its blade is kept pressed against the surface of the belt by a counterweight.
The weighing zone of gravimetric belt feeder Pfister® GBF is defined by two rollers precisely located at a fixed distance. The weighing roller is at the center of these two rollers and suspended directly through load cells on both sides. The
load on the weighing zone is measured by dual load cells which are barometrically insensitive and environmentally sealed. These load cells yield a very high linearity. The signal from the load cell is fed to a microprocessor-based gravimetric dosing controller Pfister® GDC. Thus, the speed of the belt is controlled inverse to the momentary load. From there the crushed coal is discharged into the further processes.
Gravimetric belt feeder Pfister® GBF is auto calibrated by integrated calibration sensors. In case of load cell disrepancy an automatic change over switches to a volumetric weighing mode automatically. In the volumetric mode, the feeder runs based on historic density. It reverts automatically to gravi-metric mode if load cell data show no more discrepany.
Technical drawing of a gravimetric belt feeder Pfister® GBF:
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Technical facts of gravimetric belt feeder Pfister® GBF
Application fields: Feeding to pulverizers and mills
Material: Crushed coal, bituminous coal
Feeding capacity: up to 150 t/h
Design example: - Inlet collar - Head and tail pulley - Flat type idlers with mounting brackets - Discharge hoppers with shut-off devices - Gravimetric belt feeder Pfister® GBF - Belt and scrapers - Drive unit with shaft mounted gearbox - Cleanout conveyor
Features: - Stable material dosing - Outstanding reliability - High short- and longterm accuracy - Compact, robust machinery - Custom-made lengths and widths - Large feeding range - Easy to maintain through 4 inspection doors - Pressure-proof design up to 3.5 bar as per NFPA 85
Dosing control: - Gravimetric dosing controller Pfister® GDC - VFD drive - User oriented interfaces
Certificates: ISO 9001
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Gravimetric belt feeders Pfister GBF® can be built for extra sizes according to the customer’s needs. The drawing below shows a solution for an over-size silo inlet with 3,500 x 1,000 mm in size and 8,525 mm in length.
Applications with Pfister® GBF:Oversize solutions
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Apron weighfeeder Pfister® AWF and apron feeder Pfister® AF
Hghly accurate and reliable for continuous dosing of heavy bulk material
The apron weighfeeder Pfister® AWF is designed with a heavy, durable belt made of steel plates. With this heavy-duty design it helps to control the volume and weight of materials that are added to a process, and regulates the rate at which these materials are added.
Apron weighfeeder Pfister® AWF measures large, bulky materials like minerals or coal. To withstand the heavy weight of these types of materials, the belt portion of the apron feeder is made from thick steel trays. Chains along either end of the feeder help move the trays along the conveyor area.
The apron feeder Pfister® AF shows the same design and properties, but is used as a discharge feeder without a dosing function.
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Technical factsof Apron weighfeeder Pfister® AWF and Apron feeder Pfister® AF
Application fields: Feeding bulk materials
Material: Clay, raw mix, limestone, minerals, raw coal etc.
Feeding capacity: up to 1,500 t/h (higher capacities on request)
Design example: - Inlet hopper - Head and tail pulley - Flat type idlers with mounting brackets - Discharge hoppers with shut-off devices - Drive unit with shaft mounted gearbox - Cleanout conveyor
Features: - Stable material feeding - Outstanding reliability - High weighing accuracy (referring to apron weighfeeder Pfister® AWF) - Compact, robust machinery - Custom-made lengths and widths - Large feeding range - Easy to maintain
Dosing control: - Gravimetric dosing controller Pfister® GDC - VFD drive - User oriented interfaces
Certificates: ISO 9001
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Mill feeding at a raw mill
The picture on the right displays Apron weigh-feeders Pfister® AWF installed for mill feeding of clay and raw mix.
The picture below shows Apron feeders Pfister® AF utilised in a minerals process.
Applications with Apron weighfeeder Pfister® AWF and Apron feeder Pfister® AF:
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German design & assemblyof Pfister® weighfeeders
FLSmidth Pfister assembles weighfeeders at their workshops in Augsburg/Germany and in India
FLSmidth Pfister® weighfeeders are engineered, designed and assembled at FLSmidth Pfister‘s headquarters in Augsburg/Germany and at their workshop in India.
An experienced team of engineers and technicians tests all equipment at their own test fields.
In addition, Pfister® spares and parts are kept in stock for immediate disposal.
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Thousands of FLSmidth Pfister® systems are currently in operation worldwide and require global presence. Therefore FLSmidth Pfister operates sales and service offices in eight countries on four different continents.
Experienced service technicians stand by your side and pro-vide first-class service. A 24-hour hotline and online trouble-shoo-ting provide worldwide support. Also available are telesupport packages.
FLSmidth Pfister not only keeps a large number of spare parts in stock. Skilled spares specialists are looking forward to assist you in optimizing your own spare parts manage-ment.
FLSmidth Pfister services are rounded up by service contracts, which can be adapted individually to the customer´s needs. Customer training on-site or at FLSmidth Pfister training center ensures the best possible knowledge transfer.
Pfister® customer service & after sales support
Pfister® After Sales Support:
- 24-hour Hotline- Telesupport- Modern Maintenance Management- Trainings and Seminars - Service Contracts
Augsburg - Germany
Copyright ©2014 FLSmidth A/S. ALL RIGHTS RESERVED. FLSmidth, Pfister, ProsCon and all other product names used herein are (registered) trademarks of FLSmidth A/S. This brochure makes no offers, representations or warranties (express or implied), and information and data contained in this brochure are for general reference only and may change at any time.
www.flsmidthpfister.com
Headquarters:
FLSmidth Pfister GmbHStaetzlinger Str. 7086165 Augsburg, GermanyT. +49 821 7949 0 | F. +49 821 7949 524
Sales Department: [email protected] Department: [email protected] Department: [email protected]
Branch offices:
FLSmidth USA, Inc. FLSmidth Pfister GmbH
Pfister Operations 6, Rue de Bretagne
3235 Schoenersville Rd., Bethlehem, PA 18017, USA 38070 St. Quentin Fallavier, France
p. +1 610 2645110 | f. +1 610 2645537 p. +33 4 74 95 55 44 | f. +33 4 74 94 50 75
[email protected] [email protected]
FLSmidth Pfister Ltda. FLSmidth Private Ltd.
Rua José Dolles, 264 - Jardim Clarice II i-Think Techno Campus, A-Wing, 6th Floor, Office No. 2
CEP 18116-710 - Votorantim, S.P. Brazil Pokhran Road II, Thane West - 400 607, India
p. +55 15 3416 7438 | f. +55 15 3416 7599 p. +91 22 6117 2555 | f. +91 22 6117 2862
[email protected] [email protected]
FLSmidth Pfister GmbH Malaysian Branch FLSmidth Pfister China
C-3A15, Centre Wing, Metropolitan Office Suite No. 8, Taisu Road,
Metropolitan Square, Jalan PJU 8/1 Beiguan Industrial Park,
Damansara Perdana, 47820 Petaling Jaya Jiaozhou City, Qingdao 266309, P.R. China
Selangor, Malaysia p. +86 532 8526 6706 | f. +86 532 8526 6699
p. +60 3 7728 2039 | f. +60 3 7727 2039 24-hour-hotline: 400 612 3636
[email protected] [email protected]
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