Eductor for dissolving gases in liquids

An apparatus for dissolving a gas in a liquid, comprising,

• an eductor, said eductor having an inlet portion, an outlet portion, and a throat portion,
• said throat portion located at the junction of said inlet portion and said outlet portion,
• said inlet portion having an inward convergence towards said throat,
• said outlet portion having an outward divergence away from said throat,
• a diffuser for carrying at least a gas, said diffuser being a conduit and having a tip,
• said diffuser extending through said eductor inlet portion, through said throat portion, and into said outlet portion,
• said throat portion diameter ranging from about 2 to about 4 times the diameter of said diffuser,
• said diffuser tip extending into said outlet portion a distance of from about 0.25 to about 0.5 throat diameters,
• said diffuser emitting said gas through said diffuser tip into said outlet portion, and
• including a high turbulence mixing device located at least 40 diameters downstream from said diffuser, said high turbulence mixing device mixing a gas in a liquid.

A method for dissolving a gas in a liquid, comprising, the steps of:

• providing an eductor, said eductor having an inlet portion, an outlet portion, and a throat portion, said throat portion located at the junction of said inlet portion and said outlet portion, said inlet portion having an inward convergence towards said throat, said outlet portion having an outward divergence away from said throat,
• a diffuser for carrying at least a gas, said diffuser being a conduit and having a tip,
• locating said diffuser so that it extends through said inward portion, through said throat portion, and into said outlet portion,
• said throat portion diameter ranging from about 2 to about 4 times the diameter of said diffuser,
• locating said diffuser tip in said outlet portion at a distance of from about 0.25 to about 0.5 throat diameters, and
• emitting at least a gas from said diffuser tip so that a mixing action extends through said outlet portion of said eductor.

A method for dissolving a gas in a liquid, comprising, the steps of:

• providing an eductor, said eductor having an inlet portion, an outlet portion, and a throat portion, said throat portion located at the junction of said inlet portion and said outlet portion, said inlet portion having an inward convergence towards said throat, said outlet portion having an outward divergence away from said throat,
• a diffuser for carrying at least a gas, said diffuser being a conduit and having a tip,
• locating said diffuser so that it extends through said inward portion, through said throat portion, and into said outlet portion,
• said throat portion diameter ranging from about 2 to about 4 times the diameter of said diffuser,
• locating said diffuser tip in said outlet portion at a distance of from about 0.25 to about 0.5 throat diameters,
• emitting at least a gas from said diffuser tip so that a mixing action extends through said outlet portion of said eductor, and
• including injecting a gas into a liquid in the vicinity of a highturbulence mixing device located at least 40 diameters upstream from said diffuser to produce a gas-liquid mixture, and feeding said gas-liquid mixture to said diffuser.