New Technology Simultaneously Regulates Material and Raw Gas Temperatures

Ammann has developed a burner power and dryer RPM system that is both automated and combined.

The patent-pending Ammann Drying Expert (ADX) automates both the burner power and the dryer RPM setting for virgin and RAP dryers, with a potential of saving fuel in production.

Simultaneously automating control of the material temperatures – by varying burner power – and raw gas temperatures – by varying dryer RPMs – has proven difficult.

The ADX controller eliminates the need for manual interventions by the operator to regulate burner power and dryer RPMs due to changing conditions. This prevents inefficient fluctuations and ensures a highly consistency material temperature.

With ADX, too high – and too low – material and raw gas temperatures will be avoided to the maximum.

This provides potential fuel savings and a host of other benefits:

Increased operational safety

• Continuous operation protects plant components and materials

• Operational adjustments are automated and executed more accurately than by hand

• Temperature limits cannot be exceeded, preventing damage to plant components and the associated downtime and energy-intensive restarts that go with it

Increased product quality

• Avoidance of too low / too high material temperatures at the dryer outlet improves consistency

• Optimum material temperatures = more uniform mix quality

• Improvement of mix processability

Improved ease of use

• Operator can focus on other tasks during operation

ADX is run through the Ammann as1 Control System and can be included when purchasing a new plant. Retrofits are also available. The on­ly requirement is a variable-speed drive.

ADX is currently released for virgin aggregate, RAH60 and RAH100 dryers on Ammann ABA UniBatch and ABP Universal asphalt-mixing plants in most of Europe.