Treatment of liquids
AssigneeThe BOC Group, Inc.
InventorsMichael E. Garrett, Arthur G. Boon
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Abstract
A method and apparatus suitable for sweetening sewerage which avoids the need for pumping the sewerage. The method comprises the steps of passing the sewerage under a gas-tight enclosure and causing it to fall as a stream through a first passageway, passing bubbles of a gas, such as oxygen, up through the descending sewerage to dissolve in the liquid stream to form a gas-liquid stream and causing the gas-liquid stream to ascend through a second passageway in which further bubbles of the gas are passed therethrough to dissolve further gas in the stream to balance the liquid density in the descending and ascending streams.
Claims11
A method of dissolving a gas in a liquid comprising the steps of:
- a) passing the liquid under a gas-tight enclosure;
- b) causing the liquid to descend at a first velocity as a stream within the gas-tight enclosure through a first passageway;
- c) passing bubbles of the gas at a second velocity from a source up through the descending liquid stream to dissolve the gas in the liquid stream to thereby form a gas-liquid stream, said second velocity exceeding said first velocity;
- d) causing the gas-liquid stream to ascend through a second passageway within the gas-tight enclosure;
- and
- e) passing bubbles of said gas up through the ascending gas-liquid stream in said second passageway to dissolve a further quantity of said gas in the gas-liquid stream and to balance the liquid density and avoid excess pressure drop in the descending and ascending streams.
Dependencies are inferred from the claim text.