Sand dryer is also known as the three layers of drum dryer, three return cylinder dryer, on the basis of the single-cylinder dryer, developed and manufactured, which is an industrial dryer on non-viscous, liquid material. At present three-cylinder dryer made by Dingli company, with mature technology, through the drying of the sand, fly ash, coal, mineral materials, slag and other material, the effect is very good.
The sand drum dryer is generally suitable for granular materials and can be used to treat river sand, dry-mixed mortar, yellow sand, cement plant slag, clay, artificial sand, quartz sand, slag, cinder, fly ash, gypsum, iron dry powder, limestone, and other raw materials, especially dry sand, river sand, quartz sand, and other materials have excellent drying effects.
The composition of the production line of the river sand dryer: heat source system, feeding system, conveyor belt, feeding chute, drying equipment, discharge belt, vibrating grading screen, dust removal system, induced draft fan, electric control system and other equipment.
The sand is sent to the hopper by a belt conveyor or bucket elevator, and then enters the feeding end through the feeding pipe through the feeding machine of the hopper. The inclination of the feeding pipe should be greater than the natural inclination angle of the material, so that the material can flow into the sand dryer (yellow sand dryer) smoothly. The dryer cylinder is a rotating cylinder slightly inclined to the horizontal. The material is added from the higher end, the heating medium enters from the lower end, and it comes into countercurrent contact with the material, and there is also the heating medium and the material flowing into the cylinder together with the material. 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 cylinder, it directly or indirectly receives heat from the heating medium, so that the wet material can be dried and sent out from the discharge end through a belt conveyor or a screw conveyor. A lifting plate is installed on the inner wall of the cylinder of the sand dryer (yellow sand dryer). Its function is to pick up and scatter the materials to increase the contact surface between the materials and the airflow, so as to increase the drying rate and promote the materials. go ahead. The heating medium is generally divided into hot air, flue gas and so on. After the heating medium passes through the dryer, a cyclone dust collector is generally required to capture the materials carried in the gas. If it is necessary to further reduce the dust content of the exhaust gas, it should be discharged after passing through a bag filter or a wet dust collector.
