Sludge paddle dryer is a kind of horizontal mixing dryer based on conduction. The main structure of the W-shaped shell with a jacket is equipped with pairs of hollow low-speed rotating hollow shafts, welded on the shaft are a number of stirring blades, jacket and hollow stirring blades, which are through the heat carrier, and the two heating surfaces heat the material at the same time. The heat carrier is usually fed from the middle of the dryer and discharged from the other side through the surface of the material layer in a stirred state.
Wedge-shaped hollow blades are densely arranged on the hollow shaft, through which hot medium flows through the blades. The heat transfer area in the unit effective volume is very large, the temperature of the hot medium from -40 to 320°C, can be water vapor, can also be liquid type: such as hot water, heat conduction oil, etc. Indirect conduction heating, without carrying air to take away the heat, heat is used to heat the material, heat loss is only through the body insulation layer to the environment heat dissipation. The heat transfer surface of the wedge blade has self-cleaning function. The relative movement of the material particles and the wedge surface produces washing effect, which can wash off the attached materials on the wedge surface, so that the heat transfer surface is kept clean during the movement.
Advantages:
Compact structure: the main heat transfer component of the dryer is the spatula blades, which are densely arranged on fixed rotating axes at prescribed intervals, so the heat transfer per unit volume is relatively high. For this reason, the device has a very compact structure and a small footprint.
High heat transfer efficiency: due to the good continuous mixing of raw materials, due to the relative rotation of the spatula blade and tilted blade surface and the body of the heating, cooling, ensure that all the surfaces in contact with the product can evenly transfer heat energy.
Self-cleaning performance: Since the motion of the blades is relative rotation, they have a continuous self-cleaning effect on the nearby inner surface. Products that are bonded to each other and stacked on the blades can be removed and re-entered into the production process.
Simple control: The drying process and residence time can be easily checked, controlled and adjusted. They can be individually set and adjusted according to the physical properties of the product being dried, for the number of shafts or blades, rotational speed, heat transfer body temperature and drying time.
Small dust and odor generation: Because the gas flow rate used in the drying process is small, the dust and odor generation is small. Therefore, its supporting the use of vacuum cleaners or in addition to the smell device is also very small or no need to use.
Suitable FOR DRYING products WITH high humidity: Because of the use of paddle type drying elements and continuous mixing and stirring, it can dry materials with high viscosity and high humidity. Its structure design to avoid the product in the dead corner of the retention and retention of products caused by overheating or corruption deterioration.
There is 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 the rapid wear of machine equipment caused by abrasion. In addition, the fracture risk of metal materials is minimized.
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