Energy
Sewage sludge, reject and refuse-derived fuels
Sticky, fibrous material of sharply varying consistency — the task conventional screw conveyors typically fail at.
- Material
- fibrous
Sewage sludge and reject often serve heating plants as a refuse-derived fuel and are fed to combustion at varying degrees of dryness and moisture.
It is exactly this varying consistency that makes the task difficult. The same material is crumbly one moment, sticky the next, then tough — and it is fibrous. A screw with a centre shaft offers fibrous material an axle to wrap around. Once the cross-section is blocked, only opening the system helps.
The shaftless spiral has no such axle. The cross-section stays clear and the material passes through. That is why we have supplied this field for years.
Both tube and trough conveyors are used. Which design fits better is settled during the quotation stage. Depending on the nature of the medium, special tube and trough linings and different wear protection measures are added.
- 01
Clear cross-section
Without a centre shaft there is nothing for fibres to wrap around.
- 02
Tube or trough
The design follows consistency and moisture range, not a catalogue.
- 03
Wear protection to suit the medium
Linings and coatings matched to abrasiveness and temperature.
Further tasks from Energy
- Conveying systems for heating and biomass power plantsHigh throughput at very high availability — our longest vertical conveyor measures 28 metres.
- Conveying systems for wood gasification plantsConveying technology that takes the gasification process into account — fuel quality decides reactor operation.
- Ash conveyorsA highly abrasive medium at elevated temperature — wear protection and heat-resistant construction decide service life.
A similar task at your site?
Every system is a custom build. Describe your material and your route.