Purification of compressed air discharge condensate

Details Purification of compressed air discharge condensate Purification of compressed air discharge condensate

B - Operations, Transporting

01

D

182/132

B01D 21/04 (2006.01) B01D 15/00 (2006.01) B01D 17/00 (2006.01) B01D 17/032 (2006.01)

Patent

CA 2023782

A process for separating emulsified, suspended and separate oil as well as other contaminants from the water phase of a compressed air system condensate comprises the steps of discharging air and condensate from a compressed air system into a water filled separation tank where air is separated from the condensate. Some of the contaminants heavier than water are allowed to settle to the bottom of the separation tank while lighter oil contaminants are allowed to float to the surface where they are removed. Water and the remaining contaminants which did not flow to the surface or settle to the bottom of the tank are drained away until a given amount of liquid mass has been accumulated. Pressure applied to the liquid mass forces the mass into and through an underwater coalescing media. Such action causes substantially all of the remaining oil constituents to coalesce and thereby form a floating oil phase while other contaminants are retained by the coalescing media. The floating oil phase is removed and the remaining water is relatively pure.

Méthode pour séparer les fines suspensions et émulsions d'huile ainsi que les contaminants huileux grossiers et les autres contaminants de la phase gazeuse d'un condensat de système à air comprimé, consistant à transférer l'air et le condensat du système d'air comprimé jusqu'à une cuve de séparation, remplie d'eau, où l'air est séparé du condensat. On laisse se déposer certains des contaminants plus lourds que l'eau au fond de la cuve de séparation, alors que les contaminants huileux plus légers vont flotter à la surface, où ils seront éliminés. L'eau et les contaminants restants qui ne sont pas montés à la surface ou qui ne se sont pas déposés au fond de la cuve sont drainés jusqu'à accumulation d'une certaine quantité de masse liquide. La pression appliquée à la masse liquide l'oblige à passer à travers les milieux coalescents sous l'eau. Cela a comme effet d'entraîner la coalescence de pratiquement tous les constituants huileux restants et de former ainsi une phase d'huile flottante, alors que les autres contaminants sont retenus par les milieux coalescents. La phase d'huile flottante est éliminée et l'eau restante est relativement pure.

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