Liquid purification or separation – Casing divided by membrane into sections having inlet – Energy recovery from treated liquid
Patent
1993-10-13
1996-03-19
Fortuna, Ana M.
Liquid purification or separation
Casing divided by membrane into sections having inlet
Energy recovery from treated liquid
21032169, 21032172, 210134, 210136, 2104161, 417401, 417402, 417403, B01D 6300
Patent
active
055001130
ABSTRACT:
A reverse osmosis system includes a reverse osmosis module with a reverse osmosis membrane and having an inlet port coupled to a source of feed water under predetermined pressure via a feed water inlet conduit, a product water outlet port for filtered outlet product water, and a flush water inlet port. A reciprocating pump is coupled into the feed water inlet conduit between the source of feed water and the inlet port of the module and is driven during both the pumping and return strokes solely by the feed water under pressure. A spool valve controls the flow of feed water to and from the pump during the pumping and return strokes and also controls the flow of feed water and flush water to the module, as well as brine from the module. During the pumping stroke, a check valve in a flush water inlet conduit between the spool valve and the flush water inlet port prevents brine from exiting the module. Then, during the return stroke, flush water is supplied from the pump to the module through the flush water inlet conduit, to flush substantially all of the brine from the module.
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Hartley E. Dale
Hartley F. Scott
Fortuna Ana M.
Shurflo Pump Manufacturing Co.
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