Screw Conveyors for Biomass with High Straw Content

Screw conveyors for biomass with high straw content manufactured for biogas plants.

The system consists of the following screw conveyors for biomass:

• A receiving silo with screw conveyors at the bottom
• A screw conveyor that lifts the material
• A screw conveyor that delivers the material to a biogas reactor

Key Focus Areas for These Screw Conveyors for Biomass

• Push screws have been installed above the screw conveyors in the receiving hopper. The push screws ensure continuous feeding of material to the screw conveyors
• The housings of the screw conveyors are designed as angular housings. These are intended to retain the material during transport
• Due to the nature of the straw, it has been ensured that the material cannot cause blockages in the screw conveyors
• These screw conveyors for biomass are designed with various supports for fast installation at the end customer

BEMA’s Experience with Screw Conveyors for Biomass

• BEMA has delivered various solutions for screw conveyors for biogas plants – see example of another solution here
• The medium is generally abrasive, and it is important to focus on industrial-grade construction
• In certain situations, the medium is aggressive. In such cases, screw conveyors are manufactured in stainless steel – typically 1.4301 / AISI-304
• BEMA extensively manufactures spare part rotors for use in screw conveyors for biogas. We have our own design department and can handle unique item numbers for reordering
• If necessary, BEMA can assist with measurement of screw conveyors in existing plants

Types of Screw Conveyors Delivered by BEMA for Biomass

• Standard screw conveyors with angular housings or standard U-shaped troughs
• Shaftless trough screw conveyors if the medium tends to stick
• Special screw conveyors integrated into the various processes of a biogas plant

BEMA has its own design department. Our engineers work together with the customer to adapt screw conveyors to the specific application. BEMA’s screw conveyors are tailored to actual conditions, eliminating the need for modifications to the process plant itself. This provides major advantages for the customer:

• Modifications to the process plant itself are expensive compared to a customized screw conveyor
• Screw conveyors can be delivered with supports and legs, enabling fast on-site installation
• BEMA’s screw conveyors are delivered with complete documentation, making it simple and efficient to order spare parts

BEMA collaborates both directly with biogas plants and with engineering companies that supply complete solutions for biogas facilities.

FAQ – Screw Conveyors for Biomass with High Straw Content

What are screw conveyors used for in handling biomass with high straw content?

Screw conveyors for biomass are used to move large volumes of straw-containing material safely and reliably within biogas plants. The system typically consists of a receiving silo with bottom screws, a lifting screw, and a delivery screw to the reactor. The design is developed to handle straw, which can be light, irregular, and prone to compaction, and therefore requires a robust and reliable solution.

How are blockages avoided in screw conveyors for straw?

Straw can easily create bridging and blockages, which is why push screws are installed above the bottom screws in the receiving hopper. These ensure continuous feeding of material to the screw conveyors. At the same time, the screw housings are designed as angular housings, which better retain the material and reduce the risk of accumulation. The design is optimized for continuous operation in a demanding biomass environment.

What experience does BEMA have with screw conveyors for biogas plants?

BEMA has delivered many solutions for biogas plants and has extensive experience with abrasive and sometimes aggressive media. In certain cases, the screw conveyors are manufactured in stainless steel 1.4301 / AISI-304. In addition, BEMA produces spare part rotors and can measure existing systems for accurate reproduction.

What types of screw conveyors can be supplied for biomass?

BEMA supplies standard screw conveyors with angular housings, U-shaped troughs, shaftless trough screw conveyors for sticky media, and special screw conveyors for specific process steps. All solutions are adapted to the customer’s plant, reducing the need for costly modifications and ensuring fast installation.