The sand dryer is also known as the sand three-layer drum dryer and the sand three-pass drum dryer. It is developed on the basis of the single cylinder dryer. According to the requirements of different industries for the final moisture content of dried materials, the moisture content of dried materials can reach below 0.5-1%. At present, Dingli's three-cylinder dryer has a mature process. After testing materials such as river sand, river sand, sea sand, yellow sand, corundum, pomegranate sand, quartz sand, foundry sand, and slag, the effect is very satisfactory.

Sand dryer production line consists of: heat source system, feeding system, conveying belt, feeding chute, drying equipment, discharging belt, vibrating grading screen, dust removal system, induced draft fan, electric control system and other equipment.

Working principle of sand dryer:
The sand is sent to the hopper by the belt conveyor or bucket elevator, and then enters the feeding end through the feeding machine of the hopper through the feeding pipe. The inclination of the feeding pipe should be greater than the natural inclination of the material so that the material can flow into the sand dryer (yellow sand dryer) smoothly. The drum of the dryer is a rotating drum that is slightly inclined to the horizontal line. The material is fed from the higher end, and the heat carrier enters from the lower end, and contacts with the material in countercurrent, or the heat carrier and the material flow into the cylinder together. With the rotation of the cylinder, the material moves to the lower end under the action of gravity. When the wet material moves forward in the barrel, it receives the heat from the heat carrier directly or indirectly, so that the wet material can be dried and sent out from the discharge end through a belt conveyor or a screw conveyor. There is a lifting plate on the inner wall of the sand dryer (yellow sand dryer), its function is to lift up the material and scatter it down, so as to increase the contact surface between the material and the airflow, and to improve the drying rate and promote the drying of the material. go ahead. The heat carrier is generally divided into hot air, flue gas, etc. After the heat carrier passes through the dryer, a cyclone dust collector is generally required to capture the material in the gas. If it is necessary to further reduce the dust content of the tail gas, it should also be discharged after passing through a bag filter or a wet dust collector.