| 摘要 |
An electrodialysis method and apparatus include a source of concentrate flui d, a source of dilute fluid, a collector of treated concentrate fluid, a collector of dilute fluid, an anode and a cathode. A plurality of generally planar spacers (12, 20, 28, 32) are interleaved with a plurality of membrane s (18, 29, 40, 52) to define a plurality of cells providing electrically conductive fluid connection between the anode and the cathode. Each of the spacers comprises a gasket that defines a first aperture (22, 34, 36) and a second aperture (22~, 34~, 36~). Each of said first (22) and second aperture s (22~) define an independent cell between interleaved membranes. The symmetrical, multiple split cell spacer configuration channels fluid flow through two or more narrow and elongated paths. The split cell arrangement allows for operation of the stack in parallel or in series. The invention improves the ion removal efficiency of a given membrane area, requires significantly less energy than other electrodialysis systems and substantial ly reduces stack assembly, materials and fabrication costs.
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