(1) Single-stage belt dryer: The material to be dried is uniformly distributed from the feeding end to the conveyor belt through the feeding device. The conveyor belt is usually made of perforated stainless steel sheet, which is driven by the motor through the gearbox to adjust the speed. The dry casing is usually divided into several units to independently control operating parameters and optimize operation. There is an isolation section between the drying sections where no drying medium circulates.

(2) Multi-stage belt dryer: Multi-stage belt drying is essentially composed of several single-stage belt dryers, and its operation principle is the same as that of single-stage belt dryer.

(3) Multi-layer belt dryer: Multi-layer belt dryer is often used in applications where the drying speed is low and the drying time is long, and the process conditions can be kept constant throughout the drying process. A partition is provided between the layers to organize the directional flow of the drying medium to make the material dry evenly. The multi-layer belt dryer has a small footprint and a simple structure, and is widely used in dry grain materials. However, due to the multiple loading and unloading during operation, it is not suitable for drying easy-to-adhere conveyor belts and materials that are not allowed to be broken.

(4) Impact belt dryer: The impact belt dryer is suitable for drying fabrics, tobacco leaves, surface coatings of substrates and other flaky materials. Impact belt machines usually consist of two conveyor belts. The impact belt machine can be separated into unit segments for independent control. After the drying medium is humidified, it is partially discharged, and the other part is returned to the fresh dry medium and then circulated.