Desalination device and method of manufacturing such a device
AssigneeStockholm Water Technology AB
InventorsJoydeep Dutta, Karthik Laxman Kunjali
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Abstract
A device (10) for capacitive deionization of an aqueous media containing dissolved ion species, said device comprising a cell with a first primary electrode (2) and a second primary electrode (3) arranged opposite the first primary electrode (2) and preferably separated by at least one non-conductive spacer (4, 4′). A third electrode (7) is arranged between the first and the second electrode. The third electrode (7) is grounded whereas the first and the second electrodes are polarized versus the grounded third electrode.
Claims18
A capacitive deionization device (10) comprising a first electrode (2) and a second electrode (3), the second electrode (3) opposing the first electrode (2), wherein the first electrode (2) and the second electrode (3) are separated from each other by at least one electrically non-conductive spacer (4, 4′) arranged between the first electrode and the second electrode,
- wherein the device further comprises a third electrode (7) between the first electrode (2) and the second electrode (3), the third electrode (7) allowing substantially unrestricted flow of aqueous media from a first side of the third electrode facing the first electrode (2) to a second side of the third electrode facing the second electrode (3),
- wherein the third electrode (7) is electrically grounded, and the first electrode (2) and the second electrode (3) are polarizable with opposite charges with respect to the third electrode (7),
- wherein each one of the first electrode (2), the second electrode (3) and the third electrode (7) is made of a chemically inert and flexible material, and
- wherein the first electrode (2), the second electrode (3), and the third electrode (7) are arranged in a spiral form around a longitudinal and/or common central axis such that the first electrode (2), third electrode (7) and second electrode (3) are periodically repeated along the radius in a plane perpendicular to the longitudinal and/or central axis and jointly form a substantially cylindrical structure.
A method of manufacturing a capacitive deionization device, the method comprising providing a first electrode, arranging a third electrode on a first side of the first electrode and arranging a second electrode on a second side of the third electrode, wherein the third electrode allows free flow of aqueous media from a first side surface of the third electrode facing the first electrode to a second side surface of the third electrode facing the second electrode, providing a grounded connection to the third electrode and connecting the first electrode and the second electrode such that they are polarizable with opposite charges with respect to the third electrode, wherein each one of the first electrode, the second electrode and the third electrode is made of a chemically inert and flexible material, and rolling the first electrode, third electrode and second electrode in a spiral form around a common longitudinal and/or central axis such that the first electrode, third electrode and second electrode are periodically repeated along a radius in a plane perpendicular to the longitudinal and/or central axis and jointly form a substantially cylindrical structure.
Dependencies are inferred from the claim text.