Dingli sand dryer, also known as three-layer drum dryer and three-pass drum dryer, is developed on the basis of single-cylinder dryer. It is the first choice for drying materials with good fluidity in industry. , according to the final moisture content requirements of dried materials in different industries, the moisture content of dried materials can reach less than 0.5-1%. At present, Dingli Company's three-cylinder dryer has mature technology. After testing many sand drying projects such as emery, garnet sand, quartz sand, and foundry sand, the effect is very satisfactory.

Sand dryer working principle

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 of the materials so that the materials can flow into the sand dryer (yellow sand dryer) smoothly. The dryer cylinder is a rotating cylinder, which is slightly inclined with the horizontal line. Materials are fed in through the higher end, and heat carrier enters through the lower end, and contacts with materials in counter-flow. Sometimes heat carrier and materials flow into the cylinder together. As the cylinder rotates, the materials move to the lower end due to gravity. When the wet materials move forward in the barrel, they receive the heat from the heat carrier directly or indirectly, so that the wet materials can dry, and are sent out from the discharge end through a belt conveyor or screw conveyor. The inner wall of the barrel of the sand dryer (yellow sand dryer) is equipped with a lifting plate. Its function is to lift the materials and scatter them down, thereby increasing the contact surface between the materials and the airflow, thereby increasing the drying rate and promoting the advancement of the materials. . Heat carriers are generally divided into hot air, flue gas, etc. After the heat carrier passes through the dryer, a cyclone dust collector is generally required to collect the materials in the gas. If you need to further reduce the dust content of the exhaust gas, it should also be discharged after passing through a bag dust collector or wet dust collector.