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.
Sand has no unique advantages in nature, but it has a wide range of uses after being dried by a sand dryer. River sand, yellow sand, sea sand, etc., these sands are divided according to the size of different particles, the particle size is different, the purpose of the sand is also completely different. There is no way to divide the sand when it is wet. At this time, you need to use a dryer to dry the sand and enter it into the linear vibrating screen. Through different screen meshes, the size of the sand is divided and stored separately.
The sand are conveyed to silo by belt conveyor or bucket elevator ,and transport to the feed end by the feeder of silo .The inclination of the feeding pipeline should be exceed the natural inclination of materials ,so that to facilite sand flowing into dryer smoothly .The rotating cylinder of the dryer is slighly inclined to the horizon .To feed the material from the higher end and the heat carrier enter from the lower end, such produce adverse contact between them .sometimes,they can be fed to the cylinder together .As the cylinder running,the sand carried to the lower side by the gravity.In the process of moving forward ,the wet raw material being roasted by the heat directly or indirectly to make the raw material to dry quickly, the final products discharge out by belt conveyor or screw conveyor..There is shoveling plate installed in the dryer with function of shoveling the materials up and down,to enlarge the contact area between airflow and materials and to enhance the efficiency and make the material running quickly.The heat carrier is hot air,the flue gas etc.After the dryer process,It need cyclone dust collector to catch the items in the airflow.You should use bag type or wet-type dust collector and afterward discharge the waste gas,if you intend to further reduce the dust load of the exhaust .
|Model（m）||Output（T/h）||Coal consumption kg/t||Total power|
|River sand||Fly ash||Mineral slag|
|（The output is set according to moisture : dry from 15% to 1-3%）|
1. The sand dryer is made of alloy steel plate manufacturing,the wear-resisting 3-4 times of ordinary steel , the service life of the equipment is more than 10 years.
2. Material initial moisture content 15%, final moisture to ensure below 0.5-1%,which is the preferred products of the cement plant, GGBS and dry mortar production line.
3. The sand dryer thermal efficiency is as high as 80%, at the same time, the total power is low, 40% energy saving.
4. The fuel can be adapted to the coal, oil, gas,it can be dried under 20-40mm particles material, aggregate, powder material.
5. The sand dryer covers an area of about 40% lower than single drum dryer and civil investment reduced by about 50%.
6. No air leakage phenomenon, solved the sealing difficulties, modular units, installation is convenient.
7. The discharge temperature is < 50 ℃,which can be directly feed libraries, without cooling.