working principle

Paddle dryer is a horizontal stirring dryer mainly based on conduction. The main structure is a W-shaped shell with a jacket, which is equipped with paired hollow low-speed rotating hollow shafts. Several stirring blades are welded to the shafts, and the jacket and hollow stirring blades are both connected to a heat carrier. The two heating surfaces simultaneously heat the material. The heat carrier is usually fed into the middle of the dryer, passes through the surface of the material layer in a stirred state, and is discharged from the other side.

Wedge shaped hollow blades are densely arranged on the hollow shaft, and the heat medium flows through the blades through the hollow shaft. The heat transfer area within a unit effective volume is large, and the temperature of the heat medium ranges from -40 to 320 ° C. It can be water vapor or liquid, such as hot water, heat transfer oil, etc. Indirect conduction heating does not carry away heat with air, and the heat is used to heat the material. The heat loss is only due to the heat dissipation to the environment through the insulation layer of the device. The wedge-shaped blade heat transfer surface has a self-cleaning function, and the relative motion between material particles and the wedge-shaped surface produces a scrubbing effect, which can wash away the attached materials on the wedge-shaped surface, keeping the heat transfer surface clean during motion.

Main Features

1. The retention time of materials can be adjusted, which can handle high moisture content materials and also obtain extremely low moisture content materials;

2. Typical conduction drying method, energy-saving, high conductivity coefficient, and high thermal efficiency;

3. As all the required heat is supplied by hollow blades and jackets, a small amount of hot air can be supplemented to reduce exhaust humidity. The dust entrainment is low, and the exhaust gas is easy to treat without the need for auxiliary equipment such as dust removal.

4. The blade has self-cleaning ability. The blades rotate in opposite directions, and the two inclined surfaces of the blades repeatedly stir, compress, relax, and push the material, giving the page a self-cleaning ability. The heating surface is constantly updated, and the heat transfer coefficient of the blade dryer is higher than any other conductive drying method.