Clinker Aeration by Coanda Wing®

The Coanda Wing® grate plates of the pendulum section consist of several Coanda Wing® blades  inserted into a common supporting frame.

The assembled Coanda Wing® blades form narrow and curved slots in clinker transport direction. These openings generate  sharp  jets  of  air  with  high  dynamic  pressure.  The Coanda effect forces the jets to curve parallel to the surface of the grate plate.

The air flow through the clinker purges fines from the clinker bed to the surface of the clinker.

The Coanda Wing® technology achieves the purging effect with minimum air flow and improved heat transfer between clinker and cooling air for maximum cooling and recuperation. The resultant clinker bed is characterised by its low resistance to the passage of cooling air.


The Coanda Effect

The shape of the gap between the blades creates an air jet that flows parallel to the grate surface. This phenomenon is called Coanda effect.

Grate Plate Assembly

The Coanda Wing® plates allow air to pass but not clinker. Fines are swept to the clinker bed surface and the Coanda Wing® plates are completely surrounded by cooling air. During normal operation, temperatures of between 30° C and 40° C are measured close to the grate surface.

Coanda Wing® blade

Coanda Wing® blades can be manufactured from very hard, wear and heat resistant material, far superior to the industry standard. This enhances service life while keeping the pressure drop of the grate and thus the need for electric power moderate.