Principle:
A current of air combined with centrifugal force is used.
The finer particles are carried away by air and the coarser particles are thrown by centrifugal force, which fall at the bottom.
Construction:
It consists of a cylindrical vessel with a conical base.
A rotating plate is fitted on a shaft placed at the center of the vessel.
A set of fan blades are also fitted with the same shaft.
At the base of the vessel two outlets are provided: one for the finer particles and the other for coarse particles.
Working:
The disc and the fan are rotated by means of a motor.
The feed (powder) enters at the center of the vessel and falls off the rotating plate.
The rotating fan blades produce a draft (flow) of air in the direction as shown in the diagram.
The fine particles are picked up by the draft of air and carried into the space of the settling chamber, where the air velocity is sufficiently reduced so that the fine particles are dropped and removed through the fine particle outlet.
Particles too heavy to be picked up by the air stream are removed at the coarse particle outlet.
Uses
Air separators are often attached to the ball mill or hammer mill to separate and return oversized particles for further size reduction.
Commonly Asked Questions.
With a well labelled diagram describe construction and working of “Cyclone Separator”.
Write a short note on “Cyclone Separator”.