Liquid purification or separation – Particulate material type separator – e.g. – ion exchange or... – Particular liquid receiving means or foraminous bed retainer
Patent
1978-11-03
1980-09-16
Granger, Theodore A.
Liquid purification or separation
Particulate material type separator, e.g., ion exchange or...
Particular liquid receiving means or foraminous bed retainer
B01D 2318
Patent
active
042228760
ABSTRACT:
An apparatus for constructing an inexpensive and easily fabricated underdrain filter system is disclosed. The underdrain filter system of this invention includes a liquid impervious container having a horizontal support base and continuous sides. Adjustable support anchors are rigidly attached to the horizontal support base and in turn support a multiplicity of perforated plates. Perforated plates are located and securely attached to the anchor bolts such that the plates will form a plane which is parallel to said horizontal support base and which extends between the continuous sides. The support anchors are made of a material such as stainless steel which is impervious and substantially inert with respect to the liquid being filtered. In addition, the perforated plates are also inert with respect to the liquid being filtered, and may, for example, be made of a material such as polyvinyl chloride (PVC), stainless steel, copper, fiberglass, etc. As is the case with respect to presently available filtration systems, a filtration medium such as gradated gravel and sand is located above and supported by the perforated plates.
REFERENCES:
patent: 1277832 (1918-09-01), Beckley
patent: 1503148 (1924-07-01), Bernstram
patent: 2263964 (1941-11-01), Camp
patent: 2625815 (1953-01-01), Black
patent: 3144375 (1964-08-01), Day
patent: 3178026 (1965-04-01), Christy
patent: 3615019 (1971-10-01), Early, Jr.
patent: 3630474 (1971-12-01), Minor
patent: 3762559 (1973-10-01), Knoy et al.
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