Tunnel type dryer is a continuous dryer, for processing wet solid materials. It is used for processing sliced vegetables, fruits, coconuts (for copra), rubber (for making crumb rubber) etc. Materials are fed in trays fixed in trolleys or in boxes with perforated sheet bottom. Trucks which moves inside the tunnel on rails from feeding end to the delivery end. Dried materials are obtained at the delivery end. Hot air is blown as through flow or concurrent flow or as counter flow according to the particular design.
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Pallimukku, Kochi, Kerala