Patent ID: 7329309
Filing Date: 2008-02-12
Classification: B01D,B04C,F23J

Abstract:
1. A method for separating solids from a gas-solids flow in a cyclone separator having at least two stages, comprising: separating a gas-solids flow into a first flow portion and a second flow portion in a first stage of the cyclone separator, the first flow portion having a higher density than the second flow portion; feeding the second flow portion into a second stage of the cyclone separator; separating the second flow portion into a third flow portion and fourth flow portion, the third flow portion having a higher density than the fourth flow portion; merging the first flow portion with the third flow portion by merging output diplegs from each of the first and second stages through a common output conduit; flowing the merged flow portions through the common output conduit into a location for receiving solids separated from the gas-solids flow, wherein flow through the output diplegs from each of the first and second stages is at a solid particle flux to prevent gas from flowing back into the cyclone separator.