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US 2024/0198288 A1Published application
Sustainable desalination systems and methods using recycled brine streams
AssigneeEnviro Water Minerals Company, Inc.
InventorPaul Steven Wallace
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Abstract
The present disclosure is generally directed to a desalination system. In some embodiments, the desalination system includes one or more recycle seawater systems configured to receive one or more concentrated brine streams produced by the desalination system and generate one or more recycle brine streams using the one or more concentrated brine streams and desalinated water.
Claims20
A system, comprising:
- a water pretreatment system configured to receive a seawater stream and to generate a pretreated feed stream based on the seawater stream;
- a nanofiltration (NF) system configured to receive the pretreated feed stream and to generate an NF permeate stream and an NF filtrate stream, wherein the NF permeate stream comprises monovalent salts, and the NF filtrate stream comprises divalent salts;
- a reverse osmosis (RO) system configured to receive the NF permeate stream and to generate a RO concentrate stream and desalinated water;
- a monovalent (MV) mineral recovery system configured to receive the RO concentrate stream and to generate a concentrated MV salt recycle stream;
- and
- a recycle seawater system configured to generate a recycle seawater stream based on the MV salt recycle stream, wherein the recycle seawater system is configured to direct the recycle seawater stream to the NF system.
3 more elements
A system, comprising:
- a water pretreatment system configured to receive a seawater stream and to generate a pretreated feed stream based on the seawater stream;
- a nanofiltration (NF) system configured to receive the pretreated feed stream, wherein the NF system comprises:
- a first NF unit configured to generate an NF permeate stream and an NF filtrate stream based on the pretreated feed stream, wherein the NF permeate stream comprises monovalent (MV) salts, and the NF filtrate stream comprise polyvalent (PV) salts;
- and
- a second NF unit configured to receive the NF filtrate stream and to generate an NF recycle stream, wherein the second NF unit is configured to direct the NF recycle stream upstream of the first NF unit;
- a reverse osmosis (RO) system configured to receive the NF permeate stream and to generate an RO concentrate stream and desalinated water;
- a monovalent (MV) mineral recovery system configured to receive the RO concentrate stream and to generate a concentrated MV salt recycle stream;
- and
- a recycle seawater system configured to generate a recycle seawater stream based on the MV salt recycle stream, wherein the recycle seawater system is configured to direct the recycle seawater stream to upstream of the first NF unit.
6 more elements
A system, comprising:
- a water pretreatment system configured to receive a seawater stream and to generate a pretreated feed stream based on the seawater stream;
- a nanofiltration (NF) system configured to receive the pretreated feed stream and to generate a monovalent (MV) salt stream and a polyvalent (PV) salt stream, wherein the PV salt stream comprises calcium and sulfate ions;
- a gypsum recovery system configured to receive the PV salt stream and to generate gypsum and a PV salt recycle stream;
- and
- a recycle seawater system configured to generate a recycle seawater stream based on the PV salt recycle stream, wherein the recycle seawater system is configured to direct the recycle seawater stream to the NF system.
2 more elements
Dependencies are inferred from the claim text.