Device and method for purifying waste water

Details Device and method for purifying waste water Device and method for purifying waste water

C - Chemistry, Metallurgy

02

F

C02F 1/52 (2006.01) C02F 1/68 (2006.01)

Patent

CA 2581403

The invention relates to a device for purifying water, in particular for the continuous purification of water in the paper industry, said device comprising at least one supply line (21) and at least one drain line (25) for the water. The device also comprises a compression device (28) for at least one sub- stream of the water, an injection device (13) for injecting at least one gas and an expansion device (29) for expanding at least one sub-stream of the water. In addition, the device comprises a unit for separating (30) different phases of the water for purification. The device is characterised by a control system, which detects at least one parameter of the water and controls at least the addition (12, 12') of at least one additive in accordance with the process parameter.

L'invention concerne un dispositif pour purifier l'eau, en particulier pour purifier continuellement l'eau de l'industrie papetière, ledit dispositif comprenant une entrée (21) et une sortie (25) pour l'eau. De plus, le dispositif comprend un dispositif de compression (28) pour au moins un écoulement partiel de l'eau, un dispositif d'injection (13) destiné à l'injection d'au moins un gaz et un dispositif d'expansion (29) destiné à l'expansion d'au moins un écoulement partiel de l'eau. De plus, le dispositif comprend un dispositif (30) destiné à séparer différentes phases de l'eau en vue d'une purification. Ledit dispositif est caractérisé en ce que le dispositif comprend un système de commande, lequel détermine un paramètre de traitement de l'eau et régule au moins l'ajout (12, 12') d'au moins un additif en fonction du paramètre de traitement.

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