What materials can be dried by the three-pass sand dryer?

The three-pass sand dryer is a new type of drying equipment in recent years. Compared with the single-drum drying device, the three-pass sand dryer is not only much smaller in size, but also adopts the method of nesting three cylinders, which greatly improves the thermal insulation performance of the cylinder, with less heat loss and higher thermal efficiency, which is conducive to energy-saving and low-consumption production effects. So, what materials can the three-pass sand dryer dry, and what industries can it be used for?

The three-pass sand dryer is also called a three-drum dryer. When it dehydrates and dries the material, the feeding device first feeds the material into the inner layer of the drum for smooth drying. In this process, the material realizes heat exchange under the action of the inner drum copying plate, and moves in a spiral manner to the other end of the inner drum to enter the middle layer, and countercurrent drying is carried out in the middle layer. In the middle cylinder, the material advances two steps forward and retreats one step backward in a moving manner, which can fully absorb the heat in the middle cylinder and the heat emitted by the inner cylinder. It can be said that a good heat and mass transfer effect is achieved in this process. Then it enters the outer cylinder for various heat transfers, and is discharged from the discharge end after drying to a qualified degree.

Because the three-pass sand dryer has a relatively complex structure, the process accuracy requirements are high when dehydrating and drying wet materials. If the materials with high viscosity and high moisture content are dried, it is easy to stick to the wall, which brings great inconvenience to the maintenance of the equipment. Therefore, under normal circumstances, the three-pass sand dryer has better drying efficiency and effect for powdery and granular materials with low moisture content and low viscosity. For example, it plays an important role in the drying of various artificial sand, river sand, sea sand and other materials.

Therefore, the industry field where the three-pass sand dryer is widely used is the sand production line. Whether in artificial sand making or in the drying of natural sand, as an important part of the sand and gravel material processing production line, the three-pass sand dryer plays an irreplaceable role. In addition, in ore and coal processing operations, the three-pass sand dryer can also be used for the drying production of some materials such as coal powder, slag, and mineral powder with low moisture and low viscosity. In the processing of some mixed materials, the production of dry-mixed mortar in the construction industry, and the drying of raw materials in the chemical and foundry industries, the three-pass sand dryer is also a very important component.