January 05, 2022
RAH100 Keeps Asphalt Plant’s Neighbours Happy
A retrofit to an Ammann Asphalt-Mixing Plant is reducing odour emissions and pleasing neighbours.
An Ammann RAH100 Dryer replaced the existing component on a decades-old plant owned by Asfalt Productie Limburg (APL) in Heusden-Zolder, Belgium. It is the first RAH100 to be employed in the country.
The asphalt-mixing plant is located close to a residential area, with many neighbours nearby. The retrofit reduces odour emissions significantly.
Key to the efforts is the RAH100’s advanced, proprietary heating technology. Specifically, the Dryer utilises a warming system that minimises odour while still producing mix of an extremely high quality.
Mitigating odour was the main concern, but the new Dryer also resulted in better quality mix because the gentle heating process protects the bitumen.
The RAH100 counterflow Dryer enables new asphalt mix to be made with 100% recycled asphalt (RAP). While APL is interested in eventually using more RAP, it was the RAH100’s innovative heating that spurred APL to go ahead with the retrofit.
The RAP enters at the far end of the counterflow Dryer section and moves toward the heat chamber. At the end of the counterflow Dryer, the material is transported to an accompanying silo. The heated material leaves the Dryer before the temperature becomes excessive, which reduces both fumes and odour.
The revamped plant is fully cladded and features a silencer and cover on the elevator head to reduce sound.
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