WHY CHOOSE PHYSIS INSTEAD OF A COMMON ROTARY DRYER?
Caramelization is a phenomenon that occurs in the sugar structure of materials which are heat treated producing a dark coloration of the material. It happens to the ketone and glucose sugars present in the raw materials. It occurs at high temperatures, releasing pigments and the smell of rotten fruit. Furthermore, the sugars form a hard crust on the external surface of the granule resulting in water being trapped inside. In rotary dryers the flame is introduced right at the entrance of the material, thus creating a thermal shock in the pomace, causing the effect on the external layer of the granule. To force the water trapped in the heart of the granule to escape, increasingly large quantities of heat are required, causing a vicious cycle that aggravates the phenomenon. Furthermore, in dryers the steam advances continuously with the material which, being hot, reabsorbs the humidity from the environment. These aggravating parameters have the consequences of insufficient drying, odors and dark coloration of the biomass.
