Rotary Dryer
Double cone for double drying results

Everything in the Bi-Evolution Dryer®, from the structure to the smallest detail, is designed for maximum efficiency in the drying process.  The central body of the dryer consists of a rotating biconical drying chamber, characterised by soft lines without edges or recesses. During rotation, this structure facilitates the total and continuous revolution of the mass to be dried and enables it to be stirred evenly.

For the loading and unloading of the product Italvacuum has developed special pneumatic systems, which allow to have a fixed connection position and a mobile approach element, which is moved from time to time to connect to the Bi-Evolution Dryer® hopper, thus creating a closed connection, perfectly isolated from the surrounding environment.

For the various product loading/unloading solutions, the flexibility of design and construction allows both the use of butterfly valves (standard equipment) and active or passive split valves, which are mounted directly on the dryer.

For product loading, a drum loading device is available, which is mounted directly on the dryer and consists of a pneumatically driven moving part that connects the drum, containing the product to be treated, to the hopper. The rotation of the biconical chamber tilts the drum so that the product falls under the effect of gravity into the bicone.

Two sets of lump breakers can be installed in the drying chamber. 
Their action not only prevents the formation of agglomerates, but also allows the dried mass to be pulverised during the last stage of the process, limiting the subsequent use of the mill to a minimum. 

Italvacuum indicates as Criox® System the biconical rotary vacuum dryer with the lump breaker assemblies. For more information about this accessory, please see the specific product page.

Based on the experience gained in the optimization of the drying process, Italvacuum recommends evaluating the use of an external cyclone heated safety filter, designed to avoid pressure drops and condensation phenomena, to fully protect the vacuum line.

Italvacuum has created a special total discharge device which, thanks to its rotation, allows you to completely remove and extract dried products that have difficulty in sliding inside the drying chamber. This device - called “Easy Unloading” - guarantees absolute vacuum tightness and does not involve problems for internal cleaning.