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The paddle dryer features the following advantages: it has low energy consumption; due to indirect heating, no large amounts of air are drawn in to carry away heat, and an insulating layer is installed on the outer wall of the dryer. For paste-like materials, only a small amount of heat is required to evaporate 1 KG of water. The paddle dryer system has a low cost, features a large heat transfer surface per unit of effective volume, and reduces processing time. As the size of the equipment decreases, the building area and interior space are reduced. By using different heat transfer media, it covers a wide range of materials that can be processed – including both heat-sensitive materials and those that require high-temperature treatment. Common media include water vapor, heat transfer oil, hot water, cooling water, etc. It can operate continuously or intermittently, and can be applied in many fields. It causes minimal environmental pollution, does not require the use of compressed air, and results in little entrainment of powdered materials. The amount of solvent evaporation from the material is low, making it easy to handle. For applications involving contaminated materials or solvents that need to be recovered, a closed-loop system can be used. The operating costs are low; with normal operation of this equipment, it requires only 1 hour per day per person. Low-speed stirring and a reasonable structure. The wear is minimal, so maintenance costs are very low. The operation is stable. Due to the special compressive and expansive mixing action of the wedge-shaped blades, the material particles come into full contact with the heat transfer surface. Within the axial range, the gradients of temperature, humidity, and mixing degree of the material are very small, thereby ensuring the stability of the process.