Liquid purification or separation – With movable support – Float
Patent
1980-04-29
1983-09-20
Hruskoci, Peter A.
Liquid purification or separation
With movable support
Float
2102421, 210923, 405 97, E02B 1504
Patent
active
044054580
ABSTRACT:
The floating weir is a device for regulating or maintaining continuous flow from the surface level of a liquid body. As designed, the device provides a continuous, uninterrupted weir edge for controlling liquid flow. The device is particularly suited for skimming applications such as the removal or separation of surface debris, films, scum or secondary liquids of lesser density from a primary liquid body. The unit can be mounted as a fixed installation, such as a connection to a standpipe or, when mounted on a floating platform, as a mobile floating unit. The unit utilizes a float supported weir that is unattached to the apparatus, except for contact with an adjustable retainer, which sets the weir elevation and flow rate. The floating weir is mounted within a close fitting guide collar which guides weir movement and provides, in effect, a liquid seal between these members. The liquid seal also provides a lubricating film to insure free vertical weir movement. The unit is dynamic in that it responds immediately to flow interruptions caused by surface disturbances or variations in the flow rate of the piping system connected to the unit. The weir collar is supported by the float which is buoyed by the liquid level within the unit. Flow rate fluctuations, caused by surface flow interruptions, or an increase in the discharge rate from the unit, result in a lowering of the inside liquid level and a corresponding lowering of the weir edge. The lowering of the weir edge increases the flow rate to restore equilibrium and maintains continuous flow.
REFERENCES:
patent: 3303932 (1967-02-01), Hirs et al.
patent: 3428178 (1969-02-01), Nash
patent: 3633749 (1972-01-01), Panosh
patent: 3688909 (1972-09-01), Titus
patent: 3741391 (1973-06-01), Donsbach
patent: 3782553 (1974-01-01), Brehhe
patent: 4024063 (1977-05-01), Mori
patent: 4212740 (1980-07-01), Greene
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