Materials are sent to hopper of River Sand Drying Machine by belt conveyor or bucket elevator. The barrel is installed with slope to horizontal line. Materials enter the barrel from the higher side, and hot air enters the barrel from the lower side, materials and hot air mix together. Our river sand rotary dryer have adopted the home and aboard technology, which gain good reputation worldwide. About the moisture of the inlet river sand is about 16-20%, the river sand after dryer can be fully dryed.Materials go to the lower side by gravity when the barrel rotates.

This gas stream can either be moving toward the discharge end from the feed end (known as co-current flow), or toward the feed end from the discharge end (known as counter-current flow). The gas stream can be made up of a mixture of air and combustion gases from a burner, in which case the dryer is called a direct heated dryer.Lifters on the inner side of barrel lift materials up and down to make materials and hot air mix completely. So drying efficiency is improved.Rotary Dryer Working principle:

1.It is composed of rotary cylinder, lifting blade, driving device, supporting device, sealing ring.

2.Materials is fed at one end and discharged at the other end. In indirect-type dryer, Hot gasses move through the the cylinder in direct contact with the material, either with or against the direction of its flow. The cylinder is equipped with flights , which lifts the material and shower it down through the hot gas stream. Material to be dried enters the drier, and as the dryer rotates, the material is lifted up by a series of internal material lifters in the inner wall of the dryer.

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