Innovation and technological advancement have been at the core of Marini’s legacy since patenting its first Recycling Ring forty years ago. And, even today, Marini is still an undisputed leader in the art of “introducing the RAP into the dryer drum” technology.
In the last few years, the increasingly unpredictable global scenario, as well as our clients’ need to be resilient in the asphalt production sector, has significantly shifted the focus from using highest percentages of RAP and optimising plant investments, to the using highest percentages of RAP, while increasing efficiency and keeping fumes and odour emissions to an absolute minimum. Today, respect for the environment is a non-negotiable factor when designing any new plant, which is why our clients' requests are increasingly shifting towards solutions that can completely encompass the principles of environmental sustainability.
With this in mind, Marini’s team of expert engineers and technicians have developed a new solution that satisfies all of our client’s needs all in one. In fact, to date, the Marini EvoDryer represents the best technology on the market for introducing the RAP to the recycling ring, while also providing flexibility of action that can satisfy even the most challenging and diverse market requirements.
One of the unique features of the Marini Evo Dryer is the increased length of the dryer drum, allowing the plant to change the position of the RAP Introduction after the dryer flame and in turn providing plant operators with added versatility. As a result the aggregate heat exchange area stays constant, ensuring an efficient drying process in any operating situation. Furthermore, in order to ensure the correct position of the flame inside the dryer drum a purposely designed ‘long’ burner with special internal protection is now available.
Consequently, the RAP introduction area is positioned after the flame, allowing for the creation of a mixing area at the end of the cylinder, between the aggregates and the RAP, which comes complete with purpose-built mixing blades that significantly reduce the issue of stickiness of the RAP into the dryer drum.
The RAP material can then be heated gradually, without being over-stressed by the extremely high temperatures in the flame area. This allows the residual bitumen to be recuperated as efficiently as possible, without the risk of burning or any of the other drawbacks often found with the traditional dryers currently on the market (i.e. high emissions and odour), which greatly reduce the quality of the end product.
The Marini EvoDryer comes complete with another unique and important enhancement: the new EvoDryer cylinder, which offers the possibility to treat the fumes produced by the mixing tower in the discharge area of the mixer. In fact, a dedicated fan system sucks the diffused emissions produced by the mixer discharge and also allows for the management of the complete system to maintain the depression of the tower in a dedicated chamber in the upper part of the dryer and to convey these emissions to the dryer discharge area (behind the burner). A deflector inside the cylinder optimises the ‘air flow’ emissions inside the drum, which are then flame-treated to burn off all of the organic particles, significantly reducing atmospheric emissions and odours.
“ I am delighted that the asphalt community can now rely on this extraordinary advancement in the sector”, said Luca Camprini, Senior Vice President of Sales and Marketing of Fayat Mixing Plants. “The enhanced capabilities of the recycling ring will not only play a huge role in protecting the environment, but they will also optimise our clients’ plant performance, and we’re really proud to present yet another next generation milestone in the field of RAP management.”
For more information, please contact:
Roberto Berardi, Product Marketing Manager
+39 340 6799678
r.berardi@mixingplants.fayat.com