Patent ID: 6511637
Filing Date: 2003-01-28
Classification: B01D,B03C

Abstract:
A dry scrubber assembly for treating a flue gas stream comprising:a) an evaporative cooler assembly including a vessel having a wall and an inlet and wherein said inlet is constructed and arranged to direct the flow of said flue gas approximately 90 degrees whereby said flue gas is directed generally parallel to said vessel wall and evenly distributed across said vessel; b) a reagent injection venturi assembly in communication with said evaporative cooler assembly and having converging and diverging sections and having means constructed and arranged to inject a reagent generally cocurrent with said flue gas stream in said converging section of said venturi assembly to thereby produce a first treated flue gas stream having said reagent evenly distributed and reacting therein; said means to inject including an injector assembly for spraying a reagent into said flue gas stream to react with acid gases in said flue gas stream; c) a baghouse assembly providing a reagent reaction vessel, said baghouse assembly comprising a generally vertically disposed housing with a tapered bottom section, said bottom section further having a generally horizontal inlet constructed and arranged to receive said first treated flue gas stream, said housing having a gas stream directing and distribution assembly positioned within said tapered bottom section and being in general alignment with said baghouse assembly inlet to uniformly distribute said first treated flue gas upward and throughout said housing of said baghouse assembly, said gas distribution assembly being disposed at an angle with respect to said horizontal inlet and further comprising a plurality of spaced parallel and vertically disposed members, said baghouse assembly further having a plurality of filter bags positioned above said gas stream distribution assembly, each said filter bag having a surface for forming a filter cake material on said surface of each said filter bag; and d) a filter cake management system to control the reaction in said reaction vessel, said filter cake management system having means to control and remove said filter cake material from said filter bag surfaces and further having means to activate partial removal of filter cake from said baghouse assembly.