Drying process of three cylinder dryer

Process Flow Details

The rotary three-cylinder dryer improves the internal structure of the original single-cylinder dryer, increases the pre-drying of the wet material before entering the machine, and prolongs the drying time of the wet material in the machine. Compared with the original single-cylinder dryer, the production capacity of the dryer is increased by 48-80%, the evaporation intensity per unit volume can reach 120-180kg/m3, and the standard coal consumption is only 6-8kg/t. It has advanced technology, reasonable operating parameters, simple and feasible operation, and is widely used in slag, clay and coal in various industries.

Performance characteristics

The three-cylinder dryer is mainly used for drying slag, sand, coal, fly ash, iron powder, ore, quartz sand and other granular materials. The three-cylinder dryer produced by our company has the following characteristics:

1. The barrel is self-insulated, and the thermal efficiency is as high as 95%.

2. Compared with the single-cylinder dryer, the length of the whole machine is shortened by 50%, and the land investment is reduced by about 50%.

3. The cylinder body is welded with heat-resistant and wear-resistant metal steel plate, which has long service life and convenient maintenance.

4. High thermal efficiency, the temperature of outer copper and iron is ≤60°C (the temperature of the outer body of the single-cylinder dryer is as high as 150°C).

5. The outlet temperature is low, the dust removal equipment has a long service time, and it can be directly matched with the air box pulse bag filter.

6. There is no large or small gear, the tug is used to rotate, and the whole machine runs horizontally, which makes the system more simple and reasonable.

7. The hot blast stove can be equipped with a boiling stove (also oil and gas stoves can be used), which can dry materials below 20mm.

8. The user can adjust the required moisture index according to the requirements.

Working Principle

It is sent to the hopper by a belt conveyor or a bucket elevator, and then enters the feeding end through the feeding pipeline through the feeding machine of the hopper. The inclination of the feeding pipeline should be greater than the natural inclination of the material, so that the material can flow into the mine dryer smoothly. The dryer cylinder is a rotating cylinder that is slightly inclined to the horizontal. The material is added from the higher end, the heat carrier enters from the low end, and is in countercurrent contact with the material, and some heat carrier and material flow into the cylinder together. With the rotation of the cylinder, the material runs to the bottom end by gravity. When the wet material moves forward in the cylinder, it is directly or indirectly fed by the heat carrier, so that the wet material can be dried, and then sent out through a belt conveyor or a screw conveyor at the discharge end.