Filter underdrain block

Details Filter underdrain block Filter underdrain block

1991-02-01

1992-04-28

Hart, Charles

Liquid purification or separation

Processes

Separating

210274, 210275, 210293, B01D 2446

Patent

active

051086271

ABSTRACT:
A filter block having a plurality of exterior and interior walls defining a plurality of interior chambers, said chambers including at least a first and second conduits parallel to the longitudinal axis of said block, one disposed above the other, with a third conduit provided to supply gas under pressure to the upper conduit; a top exterior wall of the block having a plurality of apertures distributed thereover. The interior chambers comprise separate conduits for both gas and liquid backwash flows. The interior walls defining the conduits are disposed to provide even distribution of the backwashing gas and to provide bearing support for the top wall of the block.

REFERENCES:
patent: 2710692 (1955-06-01), Kegel et al.
patent: 3110667 (1963-11-01), Stuppy
patent: 4065391 (1977-12-01), Farabaugh
patent: 4214992 (1980-07-01), Sasano et al.
"Filter Underdrains Problems and New Developments", J. P. Hambley, P. Eng., Oct. 1989.
"Flexscour.TM., The Ultimate Underdrain System", EIMCO.

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