Which is a good Changzhou paddle dryer

Hollow blade drying machineworking 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.

Hollow blade drying machineMain Features

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

advantage

1. Compact structure: The main heat transfer components of the dryer are shovel shaped blades, which are densely arranged at regular intervals and cross arranged on a fixed rotating shaft, resulting in relatively high heat transfer per unit volume. For this reason, the structure of this device is very compact and occupies a small area.

High heat transfer efficiency: Due to the excellent continuous mixing and stirring of raw materials, the relatively rotating shovel shaped blades and inclined blade surfaces, as well as the heating and cooling of the machine body, ensure that all surfaces in contact with the product can uniformly transfer heat energy.

2. Self cleaning performance: Due to the relative rotation of the blade movement, they have a continuous self-cleaning effect on the nearby inner surface. Products that adhere to each other and accumulate on the blades can be removed and reintroduced into the production process.

3. Simple control: The drying process and residence time can be easily checked, controlled, and adjusted. They can all be individually set and adjusted based on the physical properties of the dried product, including the number of shafts or blades, rotational speed, temperature of the heat transfer medium, and drying time.

4. The generated dust and odor are relatively small: Due to the low gas flow rate used during the drying process, the dust and odor that can be generated are also very small. Therefore, the vacuum cleaner or deodorizer used in conjunction with it is also very small or does not need to be used at all.

5. Suitable for drying products with high humidity: Due to the use of blade type drying elements and continuous mixing and stirring, it can dry materials with high viscosity and high humidity. Its structural design avoids product accumulation in dead corners and overheating or spoilage caused by product accumulation.

6. Almost no wear and material loss: The speed of the blade is very low, only 10-40 revolutions per minute, which effectively avoids abrasion and rapid wear of the machine tool equipment caused by abrasion. In addition, the risk of metal material fracture has also been reduced to a very small extent.

Applicable materials

1. Inorganic chemical industry: calcium nitrate, calcium sulfate, papermaking calcium, calcium carbonate, carbon black, iron black, iron red, soda ash, soda ash, etc;

2. Organic chemical industry: dyes, industrial plastics, polystyrene, polypropylene, high-density polyethylene, polypropylene, etc;

3. Smelting industry: nickel concentrate powder, sulfur concentrate powder, tar dephenolization, etc;

4. Food and medical industries: starch, pharmaceuticals, salt, protein, etc;

5. Others: sludge, waste residue, chicken feed, distiller's grains, etc;