Apparatus for and method of filtering a fluid

Details Apparatus for and method of filtering a fluid Apparatus for and method of filtering a fluid

1991-03-14

1992-06-23

Dawson, Robert A.

Liquid purification or separation

Processes

Separating

210130, 210181, 2104164, 123196A, 123196AB, B01D 3502

Patent

active

051240521

ABSTRACT:
A fluid filter assembly comprises a heater and a filter in series fluid flow relationship. A means for bypassing a fluid around the heater and the filter is provided which comprises ducts and a relief valve interposed between them. In normal operation the relief valve is closed so all the fluid flows through the heater and the filter. The fluid and any liquid impurities entrained therein are heated by the heater prior to passing through the filter. At low temperatures the heater cannot normally provide sufficient heat to prevent solidification of the liquid impurities entrained within the fluid which block the filter. The relief valve then opens to allow a proportion of fluid to flow through the bypass so a reduced amount of fluid flows through the heater and the filter. The heater heats the reduced flow of fluid therethrough to a temperature sufficiently high to melt the solidified liquid impurities blocking the filter.

REFERENCES:
patent: 3458414 (1969-07-01), Crane et al.
patent: 4971704 (1990-11-01), Johnson, Sr.

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