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    As showed in the drawing, materials inside the hopper is spread uniformly by the feeder onto the mesh belt made of 12-60 eye stainless steel and moved inside the drier by driving devices. Drier is composed by a few units in which hot air enters the lower chamber of the unit and the air flow is heated and distributed to mesh belt in the form of spraying flow before it enters upper chamber through the belt materials. Drying process is the duration of hot air flowing through material layer, where heat and quality is transmitted. Upper chamber is connected b air pipe with fan inlet, in which, most part of air circulates except those with low temperature and high humidity which is drained through humidity exhaust, circulated air enters upper chamber first, heated by exchanger when down-streams through material layer to the lower chamber which is connected with fan inlet by side air pipes and return air pipes, most part of air circulates with little be drained. Moreover, each unit can be completed freely according to user’s request.

    If used for dewatering vegetables, serial 3 sets is normally adopted to form initial, middle and final drying section, among which, initial section takes thinner spreading thickness, speedy running and higher drying temperature which can reach 120. hold time in the final section will be 3-6 time of initial one, spreading thickness will be 2-4 times, normally drying air around 80℃ is used for materials who require a temperature not over 60℃. All in all, multy-section composition will put the properties of belt drier into full play.