Title:
APPARATUS AND METHOD OF RECIRCULATING ELECTRODEIONISATION
Document Type and Number:
WIPO Patent Application WO2000067906
Kind Code:
A9
Abstract:
An electrodeionisation apparatus comprising a first deionising flow path and an integral second deionising flow path is described. The outflow from the first path is held in a holding tank prior to passage through the second flow path, and the outflow from the second path is available for use. Optionally, the second path outflow is partly or fully returned to the holding tank. The recirculation of the already purified water in the holding tank maintains the water in the holding tank at a higher standard than otherwise "standing" purified water. The water in the holding tank could be separately made available for use. The apparatus requires the use of only a single pair of electrodes and hence one power supply. Moreover, the ion exchange materials in the first deionising flow path can be regenerated when water is not flowing through them such that they have a greater capacity for deionisation when required.
Inventors:
EMERY NIGEL (GB)
WOODWARD ROGER (GB)
WHITEHEAD PAUL (GB)
WOODWARD ROGER (GB)
WHITEHEAD PAUL (GB)
Application Number:
PCT/US2000/011936
Publication Date:
December 27, 2001
Filing Date:
May 03, 2000
Export Citation:
Assignee:
UNITED STATES FILTER CORP (US)
EMERY NIGEL (GB)
WOODWARD ROGER (GB)
WHITEHEAD PAUL (GB)
EMERY NIGEL (GB)
WOODWARD ROGER (GB)
WHITEHEAD PAUL (GB)
International Classes:
B01D61/48; B01J47/08; C02F1/46; C02F1/469; (IPC1-7): B01J47/08; B01D61/48; C02F1/469
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