Ejector mixer for gases and/or liquids

Claim 1

An ejector mixer for fluids comprising a casing, a tube sheet mounted in said casing and dividing the same into first and second spaces, a plurality of vertical distributing tubes having upper ends mounted in said tube sheet around the circumference of a circle, said upper ends of the tubes communicating with said first space, a first inlet for a first fluid communicating with said first spaces to feed said fluid to said tubes, a second inlet for a second fluid communicating with said second space, a pair of coaxial annular rings in said casing defining an annular nozzle, said distributing tubes having lower ends, an annular grid coupled to said lower ends of the distributing tubes and to said annular rings to provide communication between said lower ends of the tubes and said annular nozzle such that the latter receives the first fluid from the tubes, means in said casing forming inner and outer nozzles coaxially arranged with respect to the first said annular nozzle which forms a middle nozzle between said inner and outer nozzles, said inner and outer nozzles being in communication with said second space to receive the second fluid therefrom, an annular mixing chamber in said casing facing said nozzles for receiving the streams of fluids discharged from the three nozzles for mixing of the streams, the stream of the first fluid from the middle nozzle being confined between the streams of the second fluid from the inner and outer nozzles, guide vanes mounted around said annular grid at the inner and outer peripheries thereof for swirling the streams discharged from the first and second nozzles in opposite directions to promote mixing with the stream discharged from the middle nozzle, and a diffuser in said casing coupled to the mixing chamber for receiving the mixed streams therefrom, said diffuser having a discharge end for discharging the mixed streams from the casing.