Rotary dryer is widely used in the field of building materials, metallurgies, chemical industry, cement and so on. It can dry slag, coal powder, mining powder, clay, sand, limestone and so on. It is made into rotary body, lifting blade, driving device, supporting device etc. The dryer machine has advantages of reasonable structure, high efficiency, low energy consumption and convenient for transportation.
Rotary drum dyer has features of compact structure, less location area, reliable work, low energy consumption, high thermal efficiency, good drying effect, easy to realize automation control, saving labor, etc. Rotary dryers consist of a horizontally inclined rotating cylinder. Material is fed at one end and discharged at the other end. In direct-type rotary dryers, hot gases move through the cylinder in direct contact with the material, either with or against the direction of its flow. The cylinder is equipped with flights, which lift the material and shower it down through the hot gas stream.
The drying machine is a rotary metal drum, which is set at an angle about 3-5 degree and rotates at a speed of 2-8 R/Min. The coal remains in the drum for 8-12min. The coal drum dryer are uniflow which mean the hot fuel gas and coal are fed in one end and discharged at the other. The heat exchange takes place during the process of gas-solids concurrent flow in the drum.
1. The process is simple and operation reliable. The factory is reasonably and compactly laid out as a whole with a combination of feeding, crushing, drying and discharging. The total investment is low and service life is long.
2. Measures are adopted to collect the dust and prevent the smoke at the drying drum, hot blast furnace and system transfer point. You will not see the air rebounded with dust and smoke.
3. The temperature of the heat transfer medium can be up to 600°C, and down to 100°C when discharging. The drying thermal efficiency is high compared with other drying system.
4. The feeding quantity is adjustable with sealed coal feeder. The coal flows fluent and unblocked.
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