US 2012/0067826 A1Published application

Filtration system

OwnerPatrick Whiteinventor

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Abstract

A filtration system and methods to remove solids contained in a fluid is disclosed. In one embodiment a system includes: a housing; a screen filter adapted to remove solids from a fluid, the filter having openings through which fluid, separated from solids, can pass as a filtered fluid and on which solids are captured on a surface of the filter; flow control valves adapted to open and close to control fluid flow; a controller electronically coupled to the flow control valves and adapted to actuate the flow control valves to reverse a fluid flow direction, thereby adapted to push separated solids away from the screen; and a differential pressure switch adapted to monitor a differential pressure developed across the screen as the screen openings are blocked by solids contained within the fluid and communicate a measured differential pressure to the controller to indicate when to actuate the valves.

Claims20

Dependent claims

A filtration system comprising:

an inlet and an outlet for a fluid;
a pump operable to actuate fluid flow of a fluid through the filtration system;
a filter housing;
a screen filter disposed within the filter housing and adapted to remove suspended solids from the fluid, the screen filter having a plurality of openings through which the fluid, separated from the solids, can pass as a filtered fluid and on which the suspended solids are captured on a surface of the screen filter;
a plurality of flow control valves fluidly coupled to the filtration system and each adapted to operatively open and close to control fluid flow in the filtration system;
a controller electronically coupled to the plurality of flow control valves and adapted to actuate one or more of the plurality of flow control valves to redirect a fluid flow direction from an outside/in flow direction to an inside/out flow direction, thereby adapted to push separated solids away from the filter screen;
and
a differential pressure switch electronically coupled to the controller and adapted to monitor a differential pressure developed across the filter screen as a plurality of filter screen openings are blocked by solids contained within the fluid and communicate a measured differential pressure to the controller, thereby to indicate to the controller when to actuate one or more of the plurality of flow control valves to push separated solids away from the filter screen.

5 more elements

A method to filter a liquid, the method comprising:

utilizing a filtration system comprising an inlet and an outlet for a fluid;
a pump operable to actuate fluid flow of the fluid through the filtration system;
a filter housing;
a screen filter disposed within the filter housing, the screen filter having a plurality of openings through which the fluid, separated from the solids, can pass as a filtered fluid and on which the suspended solids are captured on a surface of the screen filter;
a plurality of flow control valves fluidly coupled to the filtration system;
a controller electronically coupled to the plurality of flow control valves;
and a differential pressure switch electronically coupled to the controller;
removing suspended solids from the fluid by capturing the suspended solids on the surface of the screen filter;
operatively opening and closing the plurality of flow control valves to control fluid flow in the filtration system;
actuating, with the controller, one or more of the plurality of flow control valves, redirecting a fluid flow direction from an outside/in flow direction to an inside/out flow direction, thereby pushing separated solids away from the filter screen;
monitoring a differential pressure developing across the filter screen as a plurality of filter screen openings are blocked by solids contained within the fluid;
and
communicating a measured differential pressure to the controller, thereby to indicating to the controller when to actuate one or more of the plurality of flow control valve to push separated solids away from the filter screen.

10 more elements

Dependencies are inferred from the claim text.