PROCESS FOR MANUFACTURING POTABLE WATER AND APPARATUS THEREFOR
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United States of America Patent
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Issued Date -
Oct 30, 2014
app pub date -
Oct 31, 2012
filing date -
Oct 31, 2011
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Abandoned
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Abstract
It is to provide a process for manufacturing potable water from a liquid to be treated, such as seawater by using forward osmosis membrane, wherein the solution after the separation of water from dilute draw solution diluted by the migration of water from the liquid to be treated, is stably regenerated and reutilized and an apparatus therefor, and the process and apparatus are a process for manufacturing potable water which comprises, a forward osmosis step wherein a liquid of which solvent is water is allowed to contact with a draw solution produced by dissolving a prescribed amount of a volatile material in water through a semi-permeable membrane, and water in said liquid is allowed to migrate to said draw solution through said semi-permeable membrane, a distillation step wherein a dilute draw solution having been diluted with water which was produced in said step is adjusted to a prescribed temperature, and then is delivered to a distillation column where gas comprising the volatile material and water vapor is discharged from the top of the column and potable water is discharged from the bottom of the column, and a cooling • regeneration step wherein said draw solution is regenerated by cooling said gas and an apparatus therefor.
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