Dryfree mainly sells dehydrator, solar dryers, heat pump dryer machines and solar+heat pump dryer.

Two heat transfer methods of sludge drying machine

In the drying operation of the Dryfree sludge drying machine, according to the movement direction of materials and hot air flow, it can be divided into two ways: forward heat transfer and reverse heat transfer. Below, I will briefly introduce the benefits of Shunxiang heat transfer.


1. When we use a sludge dryer to process the sludge, no matter what kind of sludge, the water content is generally relatively large. If you use the dryer to deal with it at this time, it is not only easy to enter Adhesion occurs at the feed opening, and it also adheres to the inner wall of the cylinder during the drying process. In severe cases, it even appears blocked, which affects the normal drying operation and is detrimental to the equipment. The forward heat transfer method can make the high-humidity sludge fully contact with the high-temperature flue gas when it enters the dryer, quickly remove the internal moisture, and prevent the phenomenon of sticking to the wall.

2. The forward heat transfer method is used for the operation of the sludge dryer, which can make the surface of the high-humidity material crust quickly under the action of high temperature, greatly reduce the viscosity of the sludge, and help to increase the drying speed of the sludge. At the same time, the forward heat transfer method can greatly reduce the moisture content of the hot gas when it comes into contact with the material. This can greatly improve the thermal efficiency, reduce the waste of heat, and greatly enhance the sludge transfer. Thermal mass transfer effect.

3. At the feed end of the sludge dryer, the moisture content of the material is large, and the temperature of the hot air flow is also high. The heat and mass transfer effect at this time. As the sludge continues to move toward the discharge end in the dryer, the temperature of the hot air stream closer to the discharge end is also lower, and the moisture in the sludge material is less and less, which guarantees to a large extent. To improve the drying efficiency and quality of the sludge, to avoid the temperature of the finished product is too high, or the phenomenon of paste in the drying process.

Therefore, for sludge materials with high humidity and high viscosity, the forward heat transfer of the sludge dryer can not only improve the heat utilization rate, but also ensure the drying quality of the material, which is a more suitable choice for the majority of users.

Post time: Jul-17-2020