Electrochemical treatment method and device for softening water

Details Electrochemical treatment method and device for softening water Electrochemical treatment method and device for softening water

C - Chemistry, Metallurgy

02

F

C02F 1/46 (2006.01) C02F 1/461 (2006.01)

Patent

CA 2215488

This invention concerns a process and a device for the electrochemical treatment of water with a view to reducing its hardness. In this process, the water is electrolysed using an anode (5) and a cathode (7,7') connected respectively to the positive (B) and negative (A) terminals of a current generator (1), each consisting of at least one electrode. A thin, porous coating consisting in part at least of calcium carbonate is formed at the cathode (7), and simultaneously there is electrolysis of the water and formation of a flow of gases through the voids of the cathode (7), such that the crystals, consisting in part at least of calcium carbonate, which form on the said coating during electrolysis are removed from it by the said flow of gases.

La présente invention concerne un procédé et un dispositif de traitement électrochimique de l'eau en vue de la diminution de son titre hydrotimétrique, dans lesquels on effectue une électrolyse de l'eau à traiter entre une anode (5) et une cathode (7, 7'), respectivement reliées aux bornes positive (B) et négative (A) d'un générateur de courant (1), constituées chacune d'au moins une électrode. Suivant l'invention, on constitue à la cathode (7) un revêtement mince et poreux formé au moins en partie de carbonate de calcium et on réalise simultanément une électrolyse de l'eau et la formation d'un flux de gaz, à travers les porosités de la cathode (7), de façon que les cristaux constitués au moins en partie de carbonate de calcium qui se forment sur ledit revêtement au cours de l'électrolyse soient décollés de celui-ci sous l'action dudit flux de gaz.

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