Patent ID: 6065956
Filing Date: 2000-05-23
Classification: B01F,F23D,F23N

Abstract:
A universal mixer device for mixing two gaseous fluids, wherein:the device comprises an enclosure iefining first and second coaxial chambers, a first duct opening out into the first chamber to feed it with a first gas at medium pressure, a second duct opening out into the second chamber to feed it with a second gas at medium pressure, a first sonic nozzle having a throat of varying section disposed in the first chamber, and a second sonic nozzle having a throat of varying section disposed in the second chamber;the first sonic nozzle comprises a first hollow converging-diverging body of revolution serving as a seat for a first cone-shaped valve member, aid the second sonic nozzle comprises a second hollow converging-diverging body of revolution serving as a seat for a second cone-shaped valve member;the first valve member has an axial bore and defines at least a portion of the first and second chambers;the second sonic nozzle is disposed inside said axial bore;the first and second hollow converging-diverging bodies of revolution are of determined positions relative to the enclosure, the first and second valve members are mechanically linked to each other and are connected with a single actuator ensuring synchronized displacement of the first and second valve members; andthe first and second gases after passing through the coaxial and geometrically similar first and second sonic nozzles flow axially into a common downstream chamber in which the first and second gases mix in a predetermined mixing ratio determined by the dimensions of the first and second sonic nozzles.