METHOD OF DUST COLLECTION AND DUST COLLECTOR Russian patent published in 2000 - IPC

FIELD: methods and devices for dry cleaning of gases from dust; applicable in chemical, pharmaceutical, food, construction and other industries. SUBSTANCE: method includes introduction of gas laden with dust into dust collector; fraction classification of dust particles; initial separation of rough fraction; changing direction of gas flow through 180 deg and classification with periodic changing gas flow from ascending to descending directions. In this case, different dust fractions are collected to different receivers. Dust collector swirler is made in the form of hollow disk with spaced blades located on upper end of axial branch pipe for intake of dust-laden gas. In addition, dust collector is provided with shield in the form of truncated cone located under swirler and secured with its small base to disk lower edge and with cylindrical partition secured to disk lower edge from side opposite to shield. Receiving cylinder is installed coaxially to outlet pipe of cleaned gas and has inclined bottom in its lower part and located with gap between its upper edge and lower wall of swirler. Cylindrical partition is installed between receiving cylinder and cleaned gas outlet pipe. Axial outlet pipe for discharge of cleaned gas is installed concentrically to dust-laden gas inlet pipe. In this case, wall of dust-laden gas inlet pipe, lower wall of swirler, shield wall and cylindrical partition are arranged to form interconnecting cavities. EFFECT: higher degree and efficiency of dust collection due to reduced secondary carry-over of finely divided dust and extended functional potentialities of apparatus. 4 cl, 3 dwg