Today, Kolev ushered in three return river sand drying shipments, and sent to the destination: Hunan, drying river sand output of 20 tons per hour. The delivery equipment for the customized three return dryer, which is a kind of energy saving, efficient, environmental protection type of industrial drying equipment. This equipment according to the customer drying material situation (moisture), tailored products, three cylinder no taper, the material in the cylinder flow speed is slow, in order to achieve the material drying final moisture 1% below the requirements. Customer's finished river sand is used for supporting dry mortar production line.