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US 7,243,802 B2Granted
Inlet structure for clarifiers
AssigneeEnviro Enterprises, Inc.
InventorOrris E. Albertson
Life of this patent
Estimating the term…
Abstract
A clarifier is provided with an improved inlet structure which receives influent from influent column ports and discharges the influent uniformly around the entire circumference of the inlet structure. The influent column ports may be baffled. Angled guide vanes on the inlet structure reduce the flow energy and effect a tangential flow into a feedwell in the basin. The feedwell may be conical to further reduce the velocities and create an outward flow to counteract inward flows in the basin.
Claims15
In a clarifier having an influent column provided with ports for discharging influent liquid from the column, the improvement comprising:
- an inlet structure having a generally cylindrical wall closed at the bottom to present a chamber for receiving liquid discharging from the ports, said wall having a circumferential edge above which a discharge space is presented for discharging liquid from said chamber over said edge around substantially the entire circumference of said wall;
- a feedwell in the clarifier extending around said wall outwardly thereof for receiving the influent discharged from said chamber;
- and
- a plurality of deflectors spaced outwardly from the influent column in alignment with said ports for baffling the liquid flow through said ports.
1 more element
In a clarifier having an influent column provided with ports for discharging influent liquid from the column, the improvement comprising:
- an inlet structure having a generally cylindrical wall closed at the bottom to present a chamber for receiving liquid discharging from the ports, said wall having a circumferential edge above which a discharge space is presented for discharging liquid from said chamber over said edge around substantially the entire circumference of said wall;
- a feedwell in the clarifier extending around said wall outwardly thereof for receiving the influent discharged from said chamber;
- wherein said ports include an upper set of ports adjacent to a surface of the liquid in the clarifier;
- and
- wherein said ports include a lower set of ports below said upper set of ports and below said edge, said lower set of ports collectively occupying approximately 85% to 95% of the total area occupied by all of said ports.
2 more elements
A clarifier for clarification of influent liquid, comprising:
- a clarifier basin for settling of solids from the liquid;
- an influent column in said basin having a plurality of ports for discharging liquid from said column;
- an inlet structure having a generally cylindrical wall extending around said column and closed at the bottom to provide a chamber for receiving liquid from said ports, said wall having a circumferential edge;
- a plurality of guide vanes set on said edge spaced apart to present outlets from said chamber between the vanes and above said edge, said vanes being arranged to direct the liquid passing through said outlets in a generally circumferential flow pattern;
- said outlets collectively occupying at least about 70% of the circumference of said edge;
- and
- and open-bottom feedwell in said basin spaced outwardly from said inlet structure and projecting below the level of said edge;
- wherein said ports include an upper set of ports adjacent to a surface of the liquid in the clarifier;
- and
- wherein said ports include a lower set of ports below said upper sets of ports and below said edge, said lower set of ports collectively occupying approximately 85% to 95% of the total area occupied by all of said ports.
7 more elements
In a clarifier having an influent column provided with ports for discharging influent liquid from the column, the improvement comprising:
- an inlet structure having a generally cylindrical wall closed at the bottom to present a chamber for receiving liquid discharging from the ports, said wall having a circumferential edge above which a discharge space is presented for discharging liquid from said chamber over said edge around substantially the entire circumference of said wall;
- a feedwell in the clarifier extending around said wall outwardly thereof for receiving the influent discharged from said chamber;
- a plurality of guide vanes mounted on said inlet structure adjacent said edge, said vanes being angled to effect a generally tangential flow of liquid passing through said discharge space, said vanes being angled in the range of approximately 20° to 45° relative to a tangent to said edge;
- and
- a plurality of deflectors spaced outwardly from the influent column in alignment with said ports for baffling the liquid flow through said ports.
2 more elements
In a clarifier having an influent column provided with ports for discharging influent liquid from the column, the improvement comprising:
- an inlet structure having a generally cylindrical wall closed at the bottom to present a chamber for receiving liquid discharging from the ports, said wall having a circumferential edge above which a discharge space is presented for discharging liquid from said chamber over said edge around substantially the entire circumference of said wall;
- a feedwell in the clarifier extending around said wall outwardly thereof for receiving the influent discharged from said chamber;
- a plurality of guide vanes mounted on said inlet structure adjacent said edge, said vanes being angled to effect a generally tangential flow of liquid passing through said discharge space, said vanes being angled in the range of approximately 20° to 45° relative to a tangent to said edge, wherein said ports include an upper set of ports adjacent to a surface of the liquid in the clarifier and a lower set of ports below said edge, said lower set of ports collectively occupying between approximately 70% to 95% of the circumference of said edge.
In a clarifier having an influent column provided with ports for discharging influent liquid from the column, the improvement comprising:
- an inlet structure having a generally cylindrical wall closed at the bottom to present a chamber for receiving liquid discharging from the ports, said wall having a circumferential edge above which a discharge space is presented for discharging liquid from said chamber over said edge around substantially the entire circumference of said wall;
- a feedwell in the clarifier extending around said wall outwardly thereof for receiving the influent discharged from said chamber;
- a plurality of guide vanes mounted on said inlet structure adjacent said edge, said vanes being angled to effect a generally tangential flow of liquid passing through said discharge space, said vanes being angled in the range of approximately 20° to 45° relative to a tangent to said edge;
- and
- said ports including an upper set of ports adjacent to a surface of the liquid in the clarifier and a lower set of ports below said upper set of ports and below said edge, said lower set of ports collectively occupying approximately 85% to 95% of the total area occupied by all of said ports.
2 more elements
Dependencies are inferred from the claim text.