In 2006, STAG received the contract of Fisia Babcock Environment GmbH to equip the lignite-fired power plant (BOA ll - RWE) in Neurath, Germany, with pneumatic conveying facilities designed for the ash removal of electric filters. Neurath is one of the most modern and powerful lignite-fired power plants throughout the whole world.
The facility is composed of the blocks F and G with 48 pressure conveying vessels in total.
Within the individual blocks, several pressure conveying vessels are grouped, these groups respectively conveying the ash in a common conveying line.
Applied Main Components for
• Pressure conveying vessel (groups of 4x6 –pneumatic hoppers per block)
• Conveying lines to ash silo (for 4 pcs, groups 6 per block)
• Conveying lines to ash silo (bypass line)
• The important length of the conveying lines required a special expansion concept
• Fisia Babcock Environment GmbH / RWE
|Systems||Conveying rate||Conveying distance|
|Overall ash production from electric filter||80 t/h (per block)||-|
|Pneumatic electric filter ash removal||14 t/h per 6 pressure conveying vessels||290 - 400m|
- Pneumatic transport of lignite ash
- Dense phase conveying lines (Denseflow)
|Bulk material||Grain size||Moisture content||Bulk density||Temperature||Property|
|Electric filter ash from lignite incineration||-||-||1.3 t/m³||200°C||abrasive, sandy|
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.
The pressure conveying vessel is used by STAG when it comes to challenging tasks, high conveying rates and long con-veying distances. This pneumatic conveying application using the dense flow method combines energy-optimised conveying processes with perfect operational safety.
In 2013, a modern coal block has been put into operation in Karlsruhe. For this project, STAG was entrusted with the engineering and delivery of the mechanical and pneumatic ash removal of the electric filter.