Submersible in-situ oxygenator
AssigneePraxair Technology, Inc.
InventorAlan Tat Yan Cheng
Life of this patent
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Abstract
An apparatus and method for mixing a gas and a liquid while concomitantly mixing and suspending solids and sludge at the bottom of a deep tank. The present invention includes a gas-liquid aerator which is adapted to be submerged below the surface of wastewater in a deep tank. An expanding high velocity gas-liquid mixture is caused to exit from the bottom of the submerged aerator device with enough force to mix and suspend settling solids and sludge at the bottom of the deep tank.
Claims16
An apparatus for the dissolution of a gas and suspension of a settling solid in a body of liquid, said apparatus adapted to be submerged in said body of liquid, said apparatus comprising:
- a) a collector adapted to capture an undissolved gas rising toward a surface of said body of liquid, said collector adapted to direct said captured undissolved gas toward a headspace of said apparatus;
- b) a fluid pump adapted to draw a feed gas from a feed gas inlet, together with said undissolved gas and said liquid toward said pump, and direct the passage of a gas-liquid mixture downwardly in said body of liquid;
- and
- c) at least one ballast chamber connected to said apparatus, said ballast chamber adapted to be filled with a first ballast to cause said apparatus to sink into said body of liquid, and filled with a second ballast to cause said apparatus to rise upwardly in said body of liquid.
An apparatus for the dissolution of a gas and suspension of a settling solid in a body of liquid, said apparatus adapted to be submerged in said body of liquid, said apparatus comprising:
- a) an adjustable jet aerator, said aerator adapted to draw in a liquid from said body of liquid and eject said liquid at a high velocity;
- b) a venturi tube connected to said jet aerator, said venturi tube having a tapered means and adapted to receive said liquid at a high velocity from said aerator;
- c) a pipe connected at its first end to a throat of said venturi tube, a second end of said pipe adapted to draw in a first gas from a headspace below said venturi tube and feed said first gas back to said venturi tube;
- d) a conduit to supply a second gas to said headspace;
- e) a ballast chamber attached to said apparatus, said ballast tank adapted to be filled with a first ballast to cause said apparatus to sink into said body of liquid and a second ballast to cause said apparatus to rise in said body of liquid;
- and
- f) a collector to trap an undissolved gas rising from said body of liquid and direct said undissolved gas into said headspace.
Dependencies are inferred from the claim text.