Working principle of quartz sand drum dryer

July.05,2024

Quartz sand is sent to the hopper by a belt conveyor or bucket elevator, and then enters the feeding end through the feeding pipe of the hopper feeder. The inclination of the feeding pipe should be greater than the natural inclination of the material so that the material can flow smoothly into the dryer. The dryer cylinder is a rotating cylinder slightly inclined to the horizontal line. The material is added from the higher end, and the heat carrier enters from the lower end, and contacts with the material in countercurrent. There are also cases where the heat carrier and the material flow into the cylinder together.

As the cylinder rotates, the material moves to the lower end under the action of gravity. During the forward movement of the wet material in the cylinder, it is directly or indirectly heated by the heat carrier, so that the wet material can be dried, and then sent out at the discharge end through a belt conveyor or a screw conveyor.

A shoveling plate is installed on the inner wall of the cylinder. Its function is to scoop up and scatter the material, so that the contact surface between the material and the airflow is increased to increase the drying rate and promote the advancement of the material. 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 materials in the gas. If the dust content of the tail gas needs to be further reduced, it should also pass through a bag dust collector or a wet dust collector before being discharged.