working principle
The hot air enters the agitating and pulverizing drying chamber from the bottom of the dryer at a suitable spraying speed by the inlet pipe, and the material is strongly sheared, blown and rotated, so that the material is micronized by centrifugation, shearing, collision and friction. , enhanced mass transfer heat transfer. At the bottom of the dryer, the larger and drier pellets are mechanically broken under the action of the agitator, the moisture content is lower, and the particles with smaller particle size are entrained by the swirling gas stream and further dried during the ascending process. Since the gas-solid two phases are rotating, the solid phase inertia is larger than the gas phase, and the relative velocity between the solid and gas phases is large, and the mass transfer heat transfer between the two phases is strengthened, so the machine has high production intensity.
Characteristics
1. Since the material is highly dispersed by being micronized by centrifugation, shearing, collision and friction, and the relative speed between the two phases of solid and gas is large, the mass transfer heat transfer is enhanced, and the production intensity of the machine is high.
2. The dry gas enters the bottom of the dryer, which produces a strong swirling airflow, which produces a strong scouring effect on the material on the wall, eliminating the sticking phenomenon.
3. In the high temperature zone at the bottom of the dryer, the heat sensitive material is not in direct contact with the hot surface, and a special device is installed to solve the problem of coking discoloration of the heat sensitive material.
4. Due to the high circumferential gas velocity in the drying chamber, the material residence time is short, achieving high efficiency, rapid, small equipment and large production.
5. The top of the drying chamber is equipped with a ceramic ring and a swirling sheet to control the particle size and humidity of the outlet material to meet the final moisture particle size requirements of different materials.