Mechanical Classification Of Airflow Dryer

- May 18, 2017 -

Straight pipe airflow Dryer

Wet material by the feeder into the upright tube, air through the blower drum into the fin heater, heated to a certain temperature after blowing into the upright tube, in the tube speed determines the size and density of wet particles, generally greater than the sedimentation rate of particles (about 10~20 m/s). The dried particles are brought out by intense airflow, sent to two parallel cyclone separators separated by the spiral conveyor, exhaust gas through the bag filter vent. Due to the short stay time, some products often have to use two or multi-level series process.

Cyclone Air Dryer

A cyclone air dryer. The hot air flow entrainment the dried material particles into the cyclone in the tangential direction of the drying device, along the hot wall to produce rotating motion, so that the material particles in suspended rotation movement state and drying. The wall of the device can be set by steam jacket. The drying process is greatly enhanced. In addition, due to the impact of particles and the wall of the device to crush, the gas solid contact area increased, also intensified the drying process. For hydrophobic strong, not afraid of crushing heat-sensitive bulk materials are particularly applicable. However, the high moisture content, viscous, low melting point, easy sublimation explosion, easy to produce electrostatic effect of materials is not applicable.

Pulsed airflow Dryer

Pulse airflow dryer is a kind of airflow dryer. When drying operation, the use of tube diameter alternately shrink or expand, so that the airflow and particles for unequal speed flow, the relative velocity between the airflow and the heat transfer area are larger, thus enhancing the heat and mass transfer rate. In addition, the velocity of airflow in the enlarged tube decreases greatly, and the drying time is increased correspondingly.


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