Fluid granulating/coating apparatus utilizing suction air current

Claim 1

In apparatus designed to perform granulation or coating by spraying a prescribed liquid to deposit on the material accommodated in a container disposed in the lower part of the apparatus while whirling up said material by means of suction air current, said fluid granulating or coating apparatus to be worked by utilizing suction air current and in which a receptacle in the shape of a cylinder with a smooth interior accommodates bag filters disposed in the upper part of the apparatus to catch the whirled-up material, an exhaust passage in the upper part of the apparatus including a portion offset laterally from said receptacle and an opening in a side surface of the apparatus through which said suction air current is to be discharged from said cylindrical receptable, means for generating said suction air and a damper for suspending air suction disposed away from a location directly above said cylindrical receptacle and communicating with said opening, a top plate over both said cylindrical receptacle and a portion of said exhaust passage, a plurality of relatively large-sized openings in said top plate, and safety lids over said openings being movable from over said openings in response to pressure within said apparatus.