Foam-generating process and device

B - Operations – Transporting – 01 – F

Patent

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Details

B01F 3/04 (2006.01) B01F 5/04 (2006.01) C04B 38/10 (2006.01)

Patent

CA 2115257

A mixing chamber (3) and a gas inlet chamber (5) are concentrically arranged in a closed housing (1) and divided from one another by a tubular partition wall (7) provided with micropores. A flow of a liquid, foamable medium is introduced by a pump (21) axially into the mixing chamber (3). At the same time, air produced by a compressor (23) is introduced via a housing inlet (17) into the gas inlet chamber (5) under such a pressure that the air can penetrate through the micropores in the tubular partition wall (7) into the mixing chamber (3). The partition wall (7) surrounding the mixing chamber and the peripheral wall (9) are replaceably mounted between two flanges (11 and 12). The cross-sectional profile of the axial inlet and outlet (15 and 16) is matched to the cylindrical cross-section of the mixing chamber (3) so that in operation a laminar flow of the foam mixture substantially parallel to the axis occurs through the mixing chamber (3).

Une chambre de mélange (3) et une chambre d'admission de gaz (5) sont concentriquement agencées dans un boîtier fermé (1) et mutuellement séparées par une cloison (7) tubulaire pourvue de micropores. Un courant d'un milieu liquide moussant est axialement introduit dans la chambre de mélange (3) par une pompe (21). En même temps, de l'air comprimé par un compresseur (23) est introduit, dans la chambre d'admission de gaz (5) à travers un orifice d'admission (17) ménagé dans le boîtier, sous une telle pression que l'air peut pénétrer dans la chambre de mélange (3) à travers les micropores de la cloison tubulaire (7). La cloison (7) qui entoure la chambre de mélange et la paroi circonférentielle (9) sont montées interchangeables entre deux brides (11 et 12). Le profil de la section transversale d'orifices axiaux d'admission et de sortie (15 et 16) est adapté à la section transversale cylindrique de la chambre de mélange (3), de sorte qu'un courant laminaire, essentiellement parallèle à l'axe des chambres, de mélange moussant s'écoule à travers la chambre de mélange (3) pendant le fonctionnement du dispositif.

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