Liquid purification or separation – Particulate material type separator – e.g. – ion exchange or... – With rehabilitation means
Patent
1993-11-10
1995-05-09
Nessler, Cynthia L.
Liquid purification or separation
Particulate material type separator, e.g., ion exchange or...
With rehabilitation means
210275, 210279, 210291, B01D 2424
Patent
active
054137101
ABSTRACT:
A system for distributing both gas and liquid in separate conduits within an underdrain filtration system is disclosed. A tubular liquid conducting conduit also contains a separate air conduit. Extending from each conduit are, respectively, liquid conducting laterals and air laterals. The system is placed within a bed of gravel at the bottom of a filter bed and acts as conventional underdrain blocks and air grids. In a downflow mode, effluent is filtered as it passes through the filter media and filtered water is collected through orifices in the liquid conducting laterals, which in turn feed into the liquid conducting conduit to form a filtrate stream. In a backwash mode, backwash liquid flows through the liquid conducting conduit, out the laterals and up through the filter bed. During backwash, air may be introduced through the air conduit and laterals and rise through the filter media to enhance the effectiveness of the backwash operation. The disclosed system requires a height within the filter that is about equal to the height of the liquid conduit, thus, maximizes filter media depth and permits retrofit applications into relatively shallow filter beds. Methods of installing an underdrain in a filtration system are also disclosed.
REFERENCES:
patent: 593666 (1897-11-01), Jewell et al.
patent: 649409 (1900-05-01), Jewell
patent: 650671 (1900-05-01), Deutsch
patent: 653160 (1900-07-01), Williamson
patent: 668344 (1901-02-01), Wilson
patent: 741055 (1963-10-01), Miller
patent: 829113 (1906-08-01), Leopold
patent: 891998 (1908-06-01), Knight
patent: 1751819 (1930-03-01), Kniesel
patent: 1998279 (1935-04-01), Hungerford
patent: 2697520 (1984-12-01), Ellila
patent: 3189181 (1965-06-01), Couse
patent: 3831761 (1974-08-01), Chantereau
patent: 4098695 (1978-07-01), Novotny
patent: 4191652 (1980-03-01), Whitmore
patent: 4202774 (1980-05-01), Kos
patent: 4536287 (1985-08-01), Himsley et al.
patent: 5066393 (1991-11-01), Padera et al.
patent: 5068033 (1991-11-01), Tobias et al.
patent: 5068034 (1991-11-01), Walter
patent: 5087362 (1992-02-01), Brown
patent: 5108627 (1992-04-01), Berkebile
patent: 5149427 (1992-09-01), Brown et al.
patent: 5156738 (1992-10-01), Maxson
patent: 5160614 (1992-11-01), Brown
patent: 5232592 (1993-08-01), Brown et al.
patent: 5269920 (1993-12-01), Brown et al.
Chemtrol Plastic Piping Handbook, Celanese Piping Systems, Inc. (1979) pp. 1, 10, 11 and 56-65.
Eden Douglas H.
Roberts R. Lee
Nessler Cynthia L.
Roberts Filter Manufacturing Company
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