Method and device for reducing scale formation and/or...

C - Chemistry – Metallurgy – 02 – F

Patent

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C02F 5/00 (2006.01) C02F 1/42 (2006.01) C02F 1/68 (2006.01) C02F 5/08 (2006.01)

Patent

CA 2407685

The invention relates to a method and a device for reducing scale formation and/or corrosion in systems which conduct liquids or are in contact with liquids. According to the invention, this is achieved without reducing the quantity of hardness constituents contained in the liquid overall, without exchanging the hardness constituents in the liquid for other cations such as e.g. hydronium, sodium or potassium and without adding chemicals such as e.g. phosphates which inhibit scale formation to the liquid. Instead, scale formation is reduced by specifically shifting the molar distribution of the hardness constituents, especially the distribution proportions of the individual hardness constituents magnesium and calcium, strontium and barium. According to the inventive method, proportions of the hardness constituents calcium, strontium and barium in the liquid are substituted with the proportions of the hardness constituent magnesium. In addition to efficiently reducing scale formation, the method inhibits corrosion processes in systems which conduct liquids or are in contact with liquids and reduces the extent of these processes.

La présente invention concerne un procédé et un dispositif permettant de limiter la formation de tartre et/ou la corrosion dans des systèmes servant à acheminer des liquides ou étant en contact avec des liquides. Selon l'invention, ceci est obtenu sans réduire la teneur en agents de dureté du liquide dans son ensemble, sans remplacer les agents de dureté présents dans le liquide par d'autres cations tels que les ions hydronium, sodium ou potassium, et sans avoir à ajouter des produits chimiques inhibant le liquide contre la formation de tartre, tels que les phosphates. A cet effet, la formation de tartre est limitée grâce à un décalage ciblé de la répartition molaire des agents de dureté, en particulier des fractions de répartition des agents de dureté individuels magnésium d'une part, et calcium, strontium et baryum d'autre part. Selon le procédé de l'invention, les fractions des agents de duretés calcium, strontium et baryum présents dans le liquide sont remplacées par des fractions de l'agent de dureté magnésium. Ledit procédé permet, en plus d'une réduction efficace de la formation de tartre, d'inhiber les phénomènes de corrosion qui se déroulent dans les systèmes servant à acheminer des liquides ou étant en contact avec des liquides, et ainsi de réduire l'ampleur de ces phénomènes.

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