Patent ID: 7314602
Filing Date: 2008-01-01
Classification: B01F,B01J,C10G

Abstract:
1. A contact and mixing box ( 8 ) for mixing at least two fluids, comprising a bottom (B 5 ) and an upper part connected to an upper plate (BS), said contact and mixing box ( 8 ) having a largest horizontal dimension (D) and a height (H 7 ), and comprising at least one downward duct section or opening (B 1 ) located on the upper part of said contact and mixing box ( 8 ), and downstream from said downward duct section or opening (B 1 ), in a direction of overall descending circulation of said fluids, a means (B 4 ) in said contact and mixing box ( 8 ) for making the fluids swirl in an approximately nonradial direction, not parallel to the direction of overall descending circulation of said fluids from a zone upstream of said box ( 8 ) to a zone downstream of said box ( 8 ), and wherein said contact and mixing box ( 8 ) comprises at least one lateral inlet (B 3 ), said lateral inlet (B 3 ) having an approximately vertical cross sectional opening, said approximately vertical cross sectional opening having a top section and a bottom section, at least part of said bottom section being located above said means (B 4 ), and at least one peripheral annular duct section (B 6 ) having an upper level and a lower level, said lower level being located at least in part above the top section of said approximately vertical cross sectional opening of said at least one lateral inlet (B 3 ) and being spaced from said duct section or opening (B 1 ) for the exit of a mixture of fluids formed in said contact and mixing box ( 8 ).