Process and apparatus for removing scum from a liquid surface
AssigneeEngineering Specialties, Inc.
InventorsUncas B. Favret, Jr., Phil J. Duhon
Life of this patent
Estimating the term…
Abstract
Waste matter contained in a liquid is removed therefrom by introducing the liquid into a cell and introducing gas into the liquid to float waste matter to the liquid surface in the form of a floating scum. Gas nozzles situated adjacent the liquid surface are oriented to eject streams of pressurized gas across the liquid surface to blow scum into a waste outlet disposed adjacent the liquid surface. The nozzles are vertically adjustable to conform to different liquid surface levels.
Claims17
An apparatus for removing waste matter contained in a liquid, comprising:
- a cell for receiving waste-containing liquid;
- means for introducing gas into the waste-containing liquid in said cell to float waste matter to the liquid surface in the form of a floating scum;
- a waste outlet disposed adjacent at least one edge of the liquid surface,
- means for displacing scum into said waste outlet comprising gas nozzle means situated adjacent the liquid surface and oriented to eject streams of pressurized gas across the liquid surface to blow scum into said waste outlet, and means for supplying pressurized gas to said nozzles at a pressure sufficient to blow the scum into said waste outlet.
An apparatus for removing waste matter contained in a liquid, comprising:
- a tank;
- a plurality of upright baffles spaced apart horizontally in said tank to divide said tank into cells, said baffles defining gaps to communicate said cells in series;
- means for introducing waste-containing liquid into an initial one of said cells so that the liquid travels sequentially through said cells by means of said gas and exits a final cell as a treated liquid;
- recirculating means for recirculating some of said treated liquid back into each said cell;
- venturi nozzles in said recirculating means for educting gas into the treated liquid so that the gas disperses within said cells and floats waste matter to the liquid surface in each cell in the form of a floating scum;
- a blower communicating with a space above said cells for circulating gas in said space;
- waste outlets disposed along opposite sides of each cell adjacent the liquid surface;
- and
- a group of gas nozzles disposed at the liquid surface at each side of each cell, each said group of nozzles directed toward the one of said waste outlets nearest thereto and communicating with said blower to direct pressurized gas streams across the liquid surface and toward said nearest waste outlet to displace scum into the latter.
A process for removing waste from a liquid, comprising the steps of:
- locating the liquid in a cell;
- introducing gas into the liquid to float waste matter to the liquid surface to form a floating scum thereon;
- and
- ejecting a stream of pressurized gas across the liquid surface from a nozzle located adjacent the water surface and directed toward a waste outlet disposed along a side of said cell, to displace the scum into said waste outlet.
Dependencies are inferred from the claim text.