PFISTER® DRW rotor weighfeeder

PFISTER® DRW rotor weighfeederPFISTER® DRW rotor weighfeeder

PFISTER DRW: Easy maintenance fuel dosing for optimal burning

Fuel consumption. Clinker quality. Operational profits. Inconsistent fuel dosing has a broad impact across your business. The PFISTER DRW rotor weighfeeder uses advanced weighing technology to guarantee consistent and highly accurate dosing of pulverized fuels to achieve optimal combustion.

what we offer

Highly accurate fuel dosing for your pulverized fuels

Accurate fuel dosing can be the difference between your process burning too fast and just right. Between fuel economy and high fuel costs. Between optimum production levels and failing to meet your targets. The PFISTER DRW rotor weighfeeder is designed for the utmost accuracy. Equipped with ProsCon® advanced weighing technology, the rotor weighfeeder is able to automatically adapt the rotor speed based on automatic information about the rotor loading and material density. The more material, the slower it moves, ensuring the feed rate is always consistent. The complete PFISTER® DRW system comprises extraction of the material from the storage silo/hopper, weighing, dosing and material transfer into the pneumatic conveying line that feeds the burner. You can’t afford downtime in a system like this, so we’ve created a simple design that ensures minimal moving parts and high availability. All measuring parts and drives are accessible from the outside so maintenance is easy and safe. Feed rates of up to 50 tonnes per hour are possible.

PFISTER® DRW rotor weighfeederPFISTER® DRW rotor weighfeeder

Key Benefits

Proactive control for consistent, accurate and reliable fuel dosing


Automatic gap adjustment with AutoGAP 2.0

Achieving the proper gap width in your DRW rotor weighfeeder makes the difference between high levels of wear and tear and smooth operation. If the gap is too small, you risk blockages. Too big and feeding accuracy is impacted, plus wear increases. Either way, you end up with high maintenance costs and reduced equipment life. Manual adjustment is possible only when the machine is stopped – by which point the damage may have already been done. The PFISTER® AutoGAP 2.0 uses three distance sensors to automatically adjust and control the gap width during feeder operation. Preventing blockages and jams eliminates the need for reactive maintenance and moves you to a much easier – much less stressful – preventive maintenance plan. To help ensure the smooth running of your machine, AutoGAP 2.0 can be supplied with WiFi dashboard to monitor equipment performance, including motor current, speed, GAP position, and to set new parameters. Used in combination with PFISTER Wear Index you can process and analyse your data for more efficient, more effective maintenance planning.

Is your alternative fuels rate increasing?

If yes, this means that your quantities of primary fuel usage will probably decrease. PFISTER FEEDflex™ is part of our solution strategy to support customers’ sustainability efforts. It allows you to dose very small quantities of pulverized fuel pulsation-free down to 60kg per hour and without CO spikes. FEEDflex upgrade does not affect the maximum feed rate your DRW rotor weighfeeder currently achieves. You can still use it up to its maximum capacity as required in the kiln start-up. PFISTER FEEDflex reduces fuel cost with a fast ROI.

PFISTER® Smart Aeration for DRW rotor weighfeeders

Fixed aeration intervals don’t account for the changing flow behavior seen in the prehopper and silo bottom. You can end up using too much air and wasting money – or not enough, and losing productivity. Smart Aeration is an intelligent solution that adapts to changing flow requirements, reactively increasing or decreasing the pause duration in the cycle to provide optimum aeration and minimal costs.
Product Features
A rotor weighfeeder that adapts to the fuel mass as it doses

The PFISTER® DRW rotor weighfeeder is designed for dosing pulverised fuel, such as lignite, coal dust, petcoke or oil shale. But all PFISTER rotor weighfeeders use the same weighing and dosing principle. Material is extracted from the storage silo and transported in the rotor chambers from the inlet to the outlet. The rotor body is mounted on bearings, which form a weighing axis eccentric to the rotor shaft and through the middle of the inlet and outlet. A load cell weighs the content in the rotor gravimetrically, providing the bulk material mass in kilograms and this is stored together with the relative rotor wheel position. The rotor speed is controlled accordingly – more material, less speed; less material, more speed. The rotor weighfeeder then discharges the material at the outlet.

Flexible fuel dosing solutions with PFISTER® DRW
The PFISTER DRW rotor weighfeeder can be used in a wide variety of applications. We can help you decide on the optimal installation. Whether you choose a downpipe to connect the silo outlet with the rotor weighfeeder, or an intermediate calibration hopper to enable online calibration, FLSmidth has the expertise and equipment to complete your solution, exactly to your specifications. Other installation options include multiple rotor weighfeeders beneath one coal dust silo, or a block system solution whereby a special explosion-proof coal dust silo is provided with a rotor weighfeeder attached. These solutions are in use at cement plants, thermal power plants and nickel plants, among other applications.


Data sheets and brochures

Pfister DRW rotor weighfeeder brochure

(0.68 MB) | Language: English

DRW wearindextool

(0.30 MB) | Language: English

Pfister AutoGAP 2.0

(0.26 MB) | Language: English

FEEDflex Upgrade for DRW weighfeeder

(0.65 MB) | Language: English

Pfister Smart Aeration for DRW feeders

(1.73 MB) | Language: English