1、 Working principle of the three cylinder dryer Materials enter the inner layer of the rotary drum from the feeding device to achieve downstream drying. Materials are constantly lifted and scattered under the plate of the inner layer to achieve heat exchange in a spiral way. Materials move to the other end of the inner layer to enter the middle layer for countercurrent drying. Materials are repeatedly lifted in the middle layer, in a way of two steps forward and one step backward, The materials in the middle layer not only fully absorb the heat emitted by the inner layer roller, but also absorb the heat of the middle layer roller. At the same time, the drying time is prolonged, and the materials reach the optimal drying state here. The materials will travel to the other end of the middle layer and fall into the outer layer. The materials will travel in a rectangular multi loop way in the outer cylinder. The materials that achieve drying effect will travel quickly under the action of hot air and discharge from the cylinder. The wet materials that do not achieve drying effect cannot travel quickly due to their own weight. The materials will be fully dried in the rectangular board to complete the drying purpose.
2、 Scope of application Three cylinder dryer can be widely used for drying slag, clay, coal, iron powder, mineral powder and other mixed materials in various industries, dry mixed mortar and yellow sand in the construction industry, and raw materials in the chemical and casting industries.
3、 Main features of three cylinder dryer: 1. High technology content, self insulation of cylinder, thermal efficiency up to 80% (thermal efficiency of single cylinder dryer is only 35%), coal saving 68% compared with single cylinder dryer, and output increased 100%. 2. It is 60% shorter than the whole length of single drum dryer, which is conducive to process layout. Reduce the building area of the plant and save about 40% of the project investment. It covers an area of about 20m2. 3. Heat resistant and wear-resistant alloy steel plate is used, which is 4 times more wear-resistant than ordinary steel plate. Long service life and convenient maintenance. 4. High thermal efficiency, the temperature of the outer cylinder is lower than 60 ℃ (the temperature of the outer cylinder of the single cylinder dryer is as high as 150 ℃), the outlet temperature is low, and the discharge temperature is lower than 60 ℃. 5. The low outlet temperature is conducive to the long service life of the dedusting equipment, which can be directly matched with the air box pulse bag filter. 6. The civil construction investment is reduced by about 50%, and the power consumption is reduced by 60%. 7. It does not need big and small gears to rotate, and it uses supporting wheels to rotate. 8. The hot blast furnace can be equipped with fluidized bed furnace, coal injection furnace, hand fired furnace, and also used in fuel oil and gas furnaces, and can bake block, granular and powdery materials below 20 mm. The three cylinder dryer has compact structure, simple structure, reasonable layout, improves the heat exchange rate between materials and heat energy, and makes the drying effect of materials good; Less basic investment, only half of the same output of single drum dryer, reducing one-time investment; Reliable operation, low energy consumption and high thermal efficiency; At the same time, it is easy to realize automatic control, reduce operators and save labor resources.
