US 2024/0075428 A1 · Reverse osmosis or nanofiltration process for cleaning water

Abstract

Disclosed herein is a system for cleaning feed water of variable quality, the system including an inlet for selectively delivering feed water to one or other of at least two feed chambers, each feed chamber having a delivery pipe for delivering feed water to a reverse osmosis or nanofiltration, a pump to deliver the feed water from one of the chambers through its associated delivery pipe to the reverse osmosis or nanofiltration to create a concentrated feed stream and a product water stream, return pipes for selectively returning the concentrated feed stream to one or another of the at least two feed chambers, a product water outlet for removal of the product water, and switching mechanisms and/or switchers for switching the delivery of the concentrated feed stream between the selectable return pipes upon detection of a predetermined reduction in efficiency within one or another of the feed chambers.

Claims25

Dependent claims

A method of cleaning feed water of variable quality, the method comprising:

delivering feed water to at least one feed chamber;
pumping the feed water from the at least one feed chamber through a membrane to create a concentrated feed stream and a product water stream;
returning the concentrated feed stream to the at least one feed chamber for delivery back through the membrane, the concentrated feed stream combining with additional feed water in the at least one feed chamber;
removing the concentrated feed stream from the at least one feed chamber and delivering fresh feed water to the at least one feed chamber during circulation of the feed water from the membrane back to the at least one feed chamber;
and
passing the feed water through at least one desaturation unit,
wherein the at least one desaturation unit is positioned in a location selected from the group consisting of:
prior to passage of the feed water through the membrane, after passage of the feed water through the membrane, before delivering the feed water to the at least one feed chamber, and combinations thereof.

5 more elements

A system for cleaning feed water of variable quality, the system comprising:

an inlet for selectively delivering feed water to at least one feed chamber, the at least one feed chamber having a delivery pipe for delivering the feed water to a membrane;
at least one pump to deliver the feed water from the at least one feed chamber, through the delivery pipe, to the membrane, to create a concentrated feed stream and a product water stream;
at least one return pipe for selectively returning the concentrated feed stream to the at least one feed chamber;
at least one product water outlet for removal of the product water stream;
at least one desaturation unit positioned in a location selected from the group consisting of:
prior to passage of the feed water through the membrane, after passage of the feed water through the membrane, before delivering feed water to the at least one feed chamber, and combinations thereof.

3 more elements

Dependencies are inferred from the claim text.

Reverse osmosis or nanofiltration process for cleaning water

Life of this patent

Reverse osmosis or nanofiltration process for cleaning water

Life of this patent

Abstract

Claims25