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The tumble dryer, also known as rotary drum dryer, is a piece of drying equipment handing large quantities of material. Due to its advantage such as reliable operation, large operating flexibility, strong adaptability, large handing quantity, it is widely used in metallurgy, building materials,food,light industry, chemicals, coals, medicine and mining industries.

  Working principle: The wet materials are conveyed to the hopper through the belt conveyor or bucket elevator, and then enter into the feed end through the hopper charger and the feeding pipe in sequence. The inclination of the feeding pipe must be greater than the natural inclination of materials in order to make the materials flow into the dryer smoothly. The dryer cylinder is a rotation cylinder with slight inclination with the horizontal line. The materials enter from the higher end, and the heat carrier enters from the lower end;the two contact each other from opposite directions, but there are also circumstances that the heat carrier flows into the dryer body, the wet materials are heated directly or indirectly by the heat carrier to dry the wet materials, and then the materials are discharged from the discharge end through the belt conveyor or screw conveyor.