In Rotary Dryer application this is the most widely used type of dust collection equipment, in which dust-laden gas from the rotary dryers enters a cylindrical or conical chamber tangentially at one or more points and leaves through a central opening . The dust particles, by virtue of their inertia, will tend to move toward the outside separator wall, from which they are led into a receiver. A cyclone is essentially a settling chamber in which gravitational acceleration is replaced by centrifugal acceleration. At operating conditions in rotary dryers commonly employed, the centrifugal separating force or acceleration may range from 5 times gravity in very large diameter.