Triple-drum dryer is mainly used for drying a certain humidity and size of granular materials, such as yellow sand used in dry powder and mortar, various specifications of sand used in a foundry industry, blast furnace slag used in building materials and cement industry, clay in a small size, small materials, which have no chemical changes, resist high temperature and are with flyblow dust, used in chemical industry. In accordance with the request of materials and water in different industries, water in materials which will be dried must be below 1-0.5%.

The material enters the inner layer of the rotary drum from the feeding device to achieve downstream drying. The material is continuously picked up and scattered under the inner layer of the copy plate to achieve heat exchange in a spiral manner. The material moves to the other end of the inner layer and enters the middle layer. During counter-current drying, the material is continuously raised in the middle layer, showing a two-step forward and one-step travel mode. The material in the middle layer not only fully absorbs the heat emitted by the inner drum, but also absorbs the heat of the middle drum, and at the same time extends the drying Time, the material reaches the best dry state here. The material travels to the other end of the middle layer and falls into the outer layer. The material travels in the outer drum in a rectangular multi-loop manner. The material that achieves the drying effect moves quickly out of the drum under the action of hot air. The wet material that does not achieve the drying effect cannot be fast due to its own weight. As it progresses, the material is fully dried in this rectangular copy board, thus completing the drying purpose.

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