Filter

Details Filter Filter

1999-02-25

2000-12-05

Lithgow, Thomas M.

Liquid purification or separation

Filter

Medium, cleaner or agitator moved by fluid

210405, 210408, 210409, 210414, 210415, 210456, 21049701, B01D 3522, B01D 2962, B01D 2964, B01D 2994

Patent

active

061554308

ABSTRACT:
The invention provides a clog-resistant filter for separating solids from liquids, of the type wherein the liquid is passed from a filter inlet through a circular-section hollow filter element the filter being provided with means for the discharge of collected solids during filter operation, the filter comprising a housing provided with an inlet for the liquid to be filtered and provided with a first outlet for filtrate and with a second outlet for liquid containing a high concentration of solids, a hollow filter element insertable into the housing, the internal side of the filter element being in fluid connection with the inlet and the external side of the filter element being in fluid connection with the first outlet, a textured volume reduction device inserted in the filter element and being of a size and shape so as to occupy a major portion of the hollow of the filter element, the volume reduction device having a textured outer surface, the outer surface of the volume reduction device and the internal side of the filter element defining a space within the housing, wherein an incoming liquid stream flowing in the space between the filter element and the textured outer surface of the volume reducing device interacts with the textured surface to create a designed and controlled turbulence in a deliberate manner to prevent clogging of and for cleaning the internal side of the filter element, and a pressure-reduction device in fluid connection with the second outlet and provided with discharge means for solids and for the liquid in which they are entrained, whereby solid particles reaching the second extremity are swept out into the pressure-reduction device.

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