How to distinguish the two techniques when you start to produce fertilizer? It’s very simple to find out according to the orientation of material and hot air flow.
Cocurrent dryers are those where the hot air flow enters the cylinders from the feeding port, whereas counter current dryers are those where the hot air flow enters the cylinders from the discharging port. Besides, the two type rotary drum dryers regard the flue gases as the drying medium.
Usually, the fertilizer equipment manufacturer like us will refer to our customer requirements and the nature of the material to determine the fertilizer drying technique. In general, we often take into account the material’s own properties, particle size, final moisture content requirements and discharge temperature and other parameters.