Flow modifier for submerged intake screen

Details Flow modifier for submerged intake screen Flow modifier for submerged intake screen

1998-09-30

2000-04-18

Upton, Christopher

Liquid purification or separation

Structural installation

Flume stream type

210170, 210460, B01D 3300

Patent

active

060511311

ABSTRACT:
Improved flow modifier assembly for a water intake system having a cylindrical intake screen prevents damage to fish and other aquatic organisms by providing a controlled velocity profile which causes the average flow velocity to closely approach the peak flow velocity. By extending two or more concentric tubular flow modifiers into one end of the screen, it is possible to achieve flow uniformities of more than 90%, as compared to a maximum of about 72% for a prior art configuration utilizing a single tube flow modifier. In addition, the size, weight and cost of screen required can be greatly reduced for a given peak flow velocity as compared to prior art devices.

REFERENCES:
patent: 705364 (1902-07-01), Kurtz
patent: 1274121 (1918-07-01), White
patent: 2249020 (1941-07-01), McFarlin
patent: 2572173 (1951-10-01), McFarlin
patent: 2957579 (1960-10-01), McCombie
patent: 3037636 (1962-06-01), McFarlin
patent: 4261822 (1981-04-01), Richardson
patent: 4822486 (1989-04-01), Wilkins et al.
9 page paper entitled The Johnson Screen for Cooling Water Intakes presented at the Larval Exclusion Workshop in San Diego CA in Feb. 1978. The paper was subsequently transmitted to Argonne National Laboratory in late Feb. 1978 and was published in the proceedings dated Aug. 1978.

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