The multi - layer dryer is a drying device that uses a mesh belt as a conveyor to continuously dry materials, making it suitable for assembly - line operations. Since the conveyor is a mesh belt, it can dry various regular or irregular 块状物 (such as foods, vegetables, etc.). The multi - layer dryer can be used in conjunction with other equipment or independently. It can be widely applied in many industries and is an ideal device for drying and processing foods and vegetables. It is particularly suitable for drying flaky, strip - shaped, and granular materials with good air permeability. It can also be used to dry the surface moisture of soft - packaged foods.

The hot - air circulation multi - layer belt dryer, flap - type dryer, stainless - steel mesh belt dryer, and belt dryer produced by our company are batch - type and continuous - production drying equipment. The main heating methods include coal - fired heating, electric heating, steam heating, and hot - air heating. The main principle is to evenly spread the materials on the conveyor chain plates. A mesh belt with a pore size of 3 mm - 8 mm is used, and it is dragged by the transmission device to move back and forth inside the dryer. The hot air passes through the materials, and the water vapor is discharged through the moisture - exhaust holes, thus achieving the drying purpose. The length of the cabinet is composed of standard sections. To save space, the dryer can be made into a multi - layer structure, with 3 - layer and 5 - layer models being commonly used.

The dryer consists of several units. In each unit, the hot air circulates independently. Part of the exhaust gas is discharged by a dedicated moisture - exhaust fan, and there is a regulating valve to control the exhaust of each unit. The hot air passes through the chain plates full of materials either from top to bottom or from bottom to top, completing the process of heat and mass transfer and taking away the moisture from the materials. The mesh belt moves slowly, and its running speed can be freely adjusted according to the temperature of the materials. The dried finished products continuously fall into the collector. The upper and lower circulation units can be flexibly configured according to the user's needs, and the number of units can also be selected as required.