Tunnel Dryer
Tunnel dryer:
Tunnel dryer is a direct continuous type of dryer. It is a largest scale dryer.
Principle: In this dryer, the materials to be dried are sent to the air heated tunnel for drying purpose. The material is entered at one end and the dried material is colleted at the other end of the tunnel. The outgoing material met the incoming air to ensure maximum drying and the out going air contacted the wettest material so that the air was as nearly saturated as possible.