The principle used in this destoner is Differential Surface Gravity. This is achieved by using a negative pressure blower (suction Blower) which elevates the paddy to a certain level where the vibration pattern makes the in-contact-particle move forward.
Yes, since the husk is relatively so light and thin it is sucked through the blower. Mostly the amount of husk sucked is high in boiled or double boiled rice, hence keeping cyclone is most preferred
Due to its large surface area and to achieve the required differential surface gravity, such high- powered blowers are a must for best performance.