Inclined Screw Conveyor for Transport of Paper Pulp

Inclined screw conveyor for transport of paper pulp designed and manufactured for a paper mill.

What Is an Inclined Screw Conveyor?

• An inclined screw conveyor lifts material – in this case paper pulp – from a lower level to a higher level
• This means the screw conveyor is positioned at an angle relative to horizontal
• The transported material must be suitable for conveying at an angle to horizontal
• In many industrial applications, it is necessary to lift material from one level to another. Therefore, inclined screw conveyors for transport of pulp and similar materials are widely used in companies that require bulk material handling

What Should Be Considered When Using Inclined Screw Conveyors?

• The greater the angle relative to horizontal, the more the material will tend to fall back
• By reducing the clearance between the screw flights – read more about screw flights here – and the housing, the backflow in the inclined screw conveyor will be reduced
• If the material is free-flowing, it is advantageous to use a tubular screw conveyor as an inclined screw. See an example of a tubular screw conveyor here
• The rotational speed of the screw rotor generally needs to be higher as the angle relative to horizontal increases

What Measures Have Been Implemented for This Inclined Screw Conveyor for Paper Pulp?

• The diameter is large – Ø900 – because a large volume of paper pulp is being transported
• Paper pulp is aggressive at this stage of the production process. Therefore, the entire machine is manufactured in 1.4401 / AISI-316
• All components of the inclined screw conveyor have been acid pickled after manufacturing
• The inclined screw conveyor is manufactured with clamps, making it easy to install at the customer site

BEMA has its own design department with many years of experience in designing inclined screw conveyors for a wide range of applications. We can assist the customer in the planning phase to ensure the inclined screw conveyor is optimally designed for the specific application.

For an inclined screw conveyor for paper pulp, BEMA can provide guidance during the design phase regarding:

• Selection of suitable materials for the inclined screw conveyor
• Selection of screw type – tubular screw conveyor or trough screw conveyor
• Preparation of capacity calculations for the inclined screw conveyor

FAQ – Inclined Screw Conveyor for Transport of Paper Pulp

What is the purpose of an inclined screw conveyor for paper pulp?

An inclined screw conveyor is used to transport paper pulp from a lower level to a higher level in the production line. It is ideal in industries where large volumes of pulp must be moved efficiently and continuously, and where the material must be handled at an angle relative to horizontal.

What should be considered when using inclined screw conveyors?

The greater the inclination angle, the more the material will tend to fall back. This can be counteracted by reducing the clearance between the screw flight and the housing. Free-flowing materials are best handled with a tubular screw conveyor, and higher rotational speed is required at greater inclinations.

What design choices improve operation and durability?

For paper pulp, which is aggressive at this stage of the process, the entire inclined screw conveyor is manufactured in acid-resistant stainless steel (AISI-316). All components are acid pickled after production to ensure long service life, and clamps make installation easy at the customer site.

How does BEMA optimize the solution for customer needs?

BEMA provides guidance on material selection, screw type (tubular or trough screw conveyor), and prepares capacity calculations to ensure optimal performance in the specific application. Experience from many different projects makes it possible to tailor the solution precisely to the customer’s process requirements.