Through screw conveyors for slag delivered to a straw fired power plant. The screw conveyors are replacing existing screw conveyors where intermediate bearings are used.
Through screw conveyors are very suitable for transporting ash coming from the boiler process in a powerplant.
See another example of screw conveyors for ash transport
When you order through screw conveyors in BEMA we always offer to supply all relevant components such as:
BEMA’s design department with our own engineers and technicians have many years of experience to design complete solutions. The additional components can save you valuable installation time and cost for your screw conveyors.
Trough screw conveyors are designed to transport abrasive materials such as slag and ash from boiler processes in power plants. Their enclosed design ensures safe, controlled movement of material while minimizing dust and environmental impact.
Intermediate bearings quickly fail when exposed to ash and slag. Abrasive particles inevitably enter the bearing, causing rapid wear and breakdown—even when the filling degree is kept low. For this reason, intermediate bearings are not recommended for ash or slag transport.
They have only one moving part—the screw rotor—reducing maintenance needs. Bearings are placed outside the material flow, preventing contact with abrasive ash. When handling highly abrasive material, Hardox steel can be used to extend the lifetime of the screw flights.
Key factors include maintaining a low filling degree (around 10%), keeping the inclination below 15° when possible, using Hardox for higher inclinations, and installing bolted lids to ensure tightness. These considerations help secure long‑term performance and reliability.
| Product type | Screw conveyor |
|---|---|
| Industry | Energy, biomass and bioenergy handling |
| Transported material | Ash |
| Applied steel in product | Carbon steel, Hardox plate |
| Surface treatment | Carbon steel – painted |
BEMA A/S
Bredholm 3
6100 Haderslev
Denmark
CVR: 15525991
Contact
Phone: +45 74 52 16 21
E-mail: info@bema.as