Abstract: A mixing method particularly for the mixing of a plurality of fluids is described. A first fluid is injected into a mixing chamber with a given angular momentum and directed at a given tangent circle. The tangent circle has a radius less than that of the mixing chamber. A second fluid is injected into the mixing chamber at a position spaced from the first fluid injection area, and with a predetermined angular momentum opposite to that of the first fluid. The second fluid is directed at a tangent circle of radius less than that of the mixing chamber. The fluid injections are arranged such that the total angular momentum injection rate is less than angular momentum injection rates of the individual injected fluids. Any number of fluids may be mixed in this way, by suitable choice of the injection direction and angular momentum of each fluid.

Abstract: A swirl mixing device adaptable as a spray nozzle or as a fluid mixing chamber for substantially complete mixing of two or more fluids is described. The device comprises a container having a closed end and an exhaust. At least two fluid injection chambers are defined within the container, the first of the chambers being located between the closed end and the second of the chambers. A first injector is arranged to inject a first fluid to be mixed into the first injection chamber with an angular momentum in one direction, and a second injector is arranged to inject a second fluid to be mixed into the second chamber with an angular momentum in the opposite direction to that of the first fluid. The fluids meet near an opening in a collar separating the two chambers, and an exit opening from the second chamber provides a fluid flow path to the exhaust.

Abstract: A swirl mixing device particularly suited for the thorough and complete mixing of a plurality of fluid reagents is disclosed. The swirl mixing device is generally composed of a cylindrically shaped container having a closed bottom and an open upper exhaust. A plurality of swirl injection levels are provided along the length of the container. Each of said swirl injection levels includes an injector set having a plurality of symmetrically spaced injectors distributed around the inner surface of the chamber wall in a plane perpendicular to the chambers's longitudinal axis. Each of said injectors in a given injector set has an injector axis directed at a given tangent circle with common radial and azimuthal directional components whereby the injected reagent enters the chamber with swirl.