Process and device for purifying water

Details Process and device for purifying water Process and device for purifying water

C - Chemistry, Metallurgy

02

F

C02F 1/28 (2006.01) B01D 15/00 (2006.01) B01J 20/34 (2006.01) C02F 1/00 (2006.01) C02F 1/76 (2006.01)

Patent

CA 2136181

A process and device for purifying water of the type wherein activated carbon is subjected to regeneration. Tap water is contacted with activated carbon fibers characterized by a narrow micropore distribution and a high adsorption speed, to eliminate by adsorption residual chlorine, harmful trihalomethane compounds and smelly substances such as 2-methylisoborneol and geosmin that are present in tap water. Activated carbon fibers having a modal micropore diameter of about 1.8-3.0 nm, preferably, 2.0-2.7 nm, are used to cause the large-molecular-weight smelly substances to be intensively and selectively adsorbed by the activated carbon fibers. In non-use, the activated carbon fibers are occasionally heated at a temperature of 100-120°C whereby trihalomethane compounds adsorbed in the activated carbon fibers are desorbed so that the adsorption capability of activated carbon fibers with respect to trihalomethanes is restored. Accordingly, trihalomethanes as well as smelly substances can be eliminated for a long period without requiring replacement of activated carbon fiber cartridge, while using a limited amount of activated carbon fibers.

Procédé et appareil de purification d'eau au moyen d'un système de régénération à charbon actif. Le contact entre l'eau du robinet et des fibres de charbon actif présentant une étroite répartition de pores et assurant une vitesse d'adsorption excellente permet l'adsorption et l'élimination du chlore résiduel, des trihalométhanes nocifs, et des substances odoriférantes telles que le 2-méthylisobornéol et la diosmine présents dans l'eau du robinet. L'emploi de fibres de carbone actif dont les pores ont un diamètre moyen compris entre environ 1,8 et 3,0 nm, et de préférence entre environ 2,0 et 2,7, permet l'adsorption totale et sélective par lesdites fibres de carbone des substances odoriférantes ayant un poids moléculaire élevé. A tout moment lorsqu'elles ne sont pas utilisées, on chauffe les fibres de carbone jusqu'à une température comprise entre 100 et 120 DEG C, de manière à provoquer la désorption des trihalométhanes adsorbés et à restituer aux fibres leur capacité d'adsorption de trihalométhanes. Ainsi, les fibres peuvent, même en quantité limitée, adsorber pendant longtemps les trihalométhanes et les substances odoriférantes sans que l'on n'ait à remplacer les cartouches de fibres de carbone actif.

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