EnBW Kraftwerke AG, Stuttgart

In the power generation plant located at Voltastrasse, STAG has implemented various pneumatic conveying systems since 1990. The last two projects have been realised in the waste-to-energy power plant in 2006 and in the coal-fired power station in 2013.


The electric filter ash removal in the waste-to-energy power plant is ensured by means of pressure conveying vessels. These vessels convey the resulting ash into the two target silos. For the deflection to the target silo, a STAG diverter pot has been mounted.


Using a trough chain conveyor, the boiler ash generated in the coal firing is fed into the impact mill equipped with a foreign particle trap, and then into the following pneumatic conveying unit. The conveying line connecting the pressure conveying vessel and the two target silos has been equipped with the STAG dense phase system.
Thanks to the annual inspection and maintenance operations carried out by STAG, a high operational safety is ensured.

Essential Information

Applied Main Components
•    Impact mill
•    Pressure conveying vessel  
•    Dense flow conveying line (DENSEFLOW)

•    EnBW Energie Baden-Württemberg AG
•    ELEX AG

Technical Information
Performance Data
Systems Conveying rate Conveying distance
Pneumatic boiler ash removal 1.8 t/h 100 m
  • Treatment and conveyance of boiler ash from coal firing
  • Electric filter ash removal
Bulk Material
Bulk material Grain size Moisture content Bulk density Temperature Property
Boiler ash 100%< 500 µm dry 0.7 t/m3 250 °C abrasive
Appropriate Topics
Fluid Channel

Fluid channels are used in silos or bunkers where poor flowing products are stored. A fluid channel is installed slightly inclined, and the extensive aeration ensures an easy discharge of even poor flowing products.


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Dense Phase Pipe "DenseFlow"

In conventional conveyances of powdered bulk materials through smooth pipes, the irregularity of the flow rises with the increasing pipe length. This in turn, increases the wear of the system.


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Repair Machines

We are happy to carry out the necessary revision of replaced machine components. Send us your aggregate to Maienfeld and we will inspect and revise it. Experienced mechanics and plant and apparatus engineers inspect the unit.

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