The paddle dryer is a low-speed agitating dryer which is provided with a stirring slurry inside the equipment to make the wet material fully contact with the heat carrier and the hot surface under the agitation of the blade, thereby achieving the purpose of drying, and the structure is generally horizontal. Two or four axes. The paddle dryer is divided into hot air type and conductive type.
The hot air type is in contact with the dried material by a heat carrier (such as hot air) and is dried. In the conductive type, the heat carrier is not in direct contact with the material to be dried, but the hot surface and the material are in contact with each other.
A wedge-shaped hollow blade is densely arranged on the hollow shaft, and the heat medium flows through the blade through the hollow shaft. The heat transfer area in the effective volume of the unit is large, and the temperature of the heat medium is from -40 to 320 ° C, which may be water vapor or liquid type: such as hot water and heat transfer oil. Indirect transmission to heating, no air carrying heat, heat is used to heat the material, heat loss is only through the body insulation layer to the environment. The wedge-shaped blade heat transfer surface has a self-cleaning function, and the relative movement of the material particles and the wedge surface produces a scrubbing action, which can wash away the deposit on the wedge surface, and maintains a clean heat transfer surface during the test operation.