Method and system to recover waste heat to preheat feed water for a reverse osmosis unit
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United States of America Patent
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Jul 17, 2012
Grant Date -
Oct 13, 2011
app pub date -
Apr 8, 2010
filing date -
Apr 8, 2010
priority date (Note) -
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Abstract
In one embodiment, the present invention includes a liquid processing system. In the liquid processing system, a first liquid source transmits feed liquid to a heat exchange unit while a heat generation unit transmits warm coolant to the heat exchange unit. A heat generation unit warms the feed liquid while cooling the warm coolant. The warmed feed liquid is sent to a pump, and cooled feed liquid from a second liquid source is mixed with the warmed feed liquid as necessary until a target temperature is reached. The warmed feed liquid is sent to a reverse osmosis unit for filtering and the resulting permeate is sent to the liquid utilization unit. The cooled coolant is sent from the heat exchange unit to the storage tank and if the cooled coolant is not cool enough, it is sent to a cooling tower for further cooling.
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