A process for cleansing water that contains organic substances

Details A process for cleansing water that contains organic substances A process for cleansing water that contains organic substances

C - Chemistry, Metallurgy

02

F

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

Patent

CA 2200277

Conventional regenerative adsorption processes used to cleanse water of organic substances contained in it are of limited use if, because of a low content of organic substances contained in the water, the charge in the adsorber is so small that the condensed water-vapor desorbate does not form two phases, or if the organic components dissolve easily in water and are thus difficult to separate from the condensed desorbate after desorption has taken place. The process according to the present invention improves phase separation by feeding back the aqueous phase of the desorbate onto a charged adsorber before its desorption, in order to increase the charge; it also reduces the quantity of water vapor required for desorption by the application of additional external heating. Purification of industrial process water or ground water.

Les procédés classique de régénération par adsorption, utilisés pour débarrasser l'eau des substances organiques qu'elle renferme, ont une portée très limitée si, en raison de la faible teneur de l'eau en substances organiques, la charge dans l'adsorbeur est tellement faible que le produit de désorption dans la vapeur-eau condensée ne forme pas deux phases, ou si les constituants organiques se dissolvent facilement dans l'eau, rendant ainsi difficile la séparation du produit de désorption condensé une fois la désorption achevée. Le procédé de la présente invention améliore la séparation phasique en renvoyant la phase aqueuse du produit de désorption sur un adsorbeur chargé avant sa désorption, de façon à augmenter la charge; cela permet également de réduire la quantité de vapeur d'eau requise pour la désorption par chauffage externe supplémentaire. Purification de l'eau de procédés industriels ou de l'eau souterraine.

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