Separator

Liquid purification or separation – Recirculation

Reexamination Certificate

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Details

C210S521000, C210S532100

Reexamination Certificate

active

06183634

ABSTRACT:

BACKGROUND OF THE INVENTION
This invention relates to a separator for separating solids suspended in a liquid from the liquid.
Separators have been provided with settling members which have settling surfaces onto which solids can settle. The settling members have been provided in the form of cones, spirals or inclined angle-iron sections.
SUMMARY OF THE INVENTION
According to the invention a separator includes a vessel having;
feed means for feeding liquid containing suspended solids into the vessel;
a liquid outlet;
a sludge outlet; and
at least one settling member located above the sludge outlet, the settling member having inner and outer settling surfaces, with the inner settling surface surrounding an aperture extending through the settling member.
The settling member may be endless and the inner and outer settling surfaces may be connected together at an apex. Preferably the inner and outer settling surfaces diverge away from one another from the apex. In one form of the invention the apex is circular in plan view. In another form of the invention the apex is polygonal in plan view.
The feed means preferably includes a downwardly extending feed conduit.
A recycle conduit may be provided for recycling liquid into the feed conduit.


REFERENCES:
patent: 378495 (1888-02-01), Colles
patent: 1043698 (1912-11-01), Holthoff
patent: 1176774 (1916-03-01), Morris
patent: 1176775 (1916-03-01), Morris
patent: 1274814 (1918-08-01), Sundness et al.
patent: 1345090 (1920-06-01), Keller
patent: 2793186 (1957-05-01), Dunell et al.
patent: 3239066 (1966-03-01), Schick
patent: 3797203 (1974-03-01), Murdock, Sr.
patent: 4816146 (1989-03-01), Schertler
patent: 4897206 (1990-01-01), Castelli
patent: 4921609 (1990-05-01), Fromson
patent: 4988441 (1991-01-01), Moir
patent: 5013431 (1991-05-01), Doets
patent: 5277806 (1994-01-01), Kuntz
patent: 5433862 (1995-07-01), Batson
patent: 5800715 (1998-09-01), Batson

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