Patent ID: 8337787

Claim:
A compact device for mixing fluids in a downflow reactor comprising: a reactor enclosure ( 1 ), at least one substantially horizontal gathering means ( 5 ) provided with a vertical gathering line ( 7 ) intended to receive the fluids, at least one injection conduit ( 8 ) arranged in said gathering line, an annular mixing chamber ( 9 ) located downstream from said at least one substantially horizontal gathering means ( 5 ) in the direction of circulation of the fluids, said annular mixing chamber comprising an inlet end directly connected to said gathering line ( 7 ) and an outlet end ( 10 ) for passage of the fluids, said outlet end ( 10 ) being positioned in the radial direction of said reactor enclosure ( 1 ), and a horizontal predistribution plate ( 11 ) having a plurality of holes and comprising at least one chimney ( 13 ), said plate being located downstream from said chamber ( 9 ) at a distance d 2 , in the direction of circulation of the fluids, and wherein said annular mixing chamber is in the form of an open toroid and has a length as defined by the angle formed by radial planes passing through the inlet and outlet ends of the annular mixing chamber, said angle ranging between 90 and 270 degrees.