Apparatus and process for oil decontamination

C - Chemistry – Metallurgy – 10 – G

Patent

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Details

C10G 31/06 (2006.01) B01D 19/00 (2006.01) C10M 175/00 (2006.01) C10M 175/02 (2006.01)

Patent

CA 2067103

An apparatus and process for the decontamination of oil such as lubricating, seal, hydraulic or transformer oil, contaminated by gaseous and/or volatile liquid contaminants such as light hydrocarbons, acid gases and water. The apparatus comprises a jet compressor (11) combined with a residence time chamber (12) wherein the contaminated oil is intimately mixed with air or inert gas from a source (19) at elevated temperature, whereby heat and mass transfers occur and the contaminants transfer from the oil phase to the gas phase. The mixture is then flashed into a disengaging drum (14) whereby the gas separates from the oil such that the gas is 95 - 100% saturated with contaminants. This gas is vented, taking with it the volatile contaminant liquids and gases and the decontaminated oil is returned to the reservoir (1) from the bottom of the disengaging drum (14).

L'appareil et le procédé décrits servent à la décontamination d'huiles, telles que des huiles lubrifiantes, d'étanchéité, hydrauliques ou pour transformateur, contaminées par des agents de contamination liquides gazeux et/ou volatils, tels que des hydrocarbures légers, des gaz acides et de l'eau. L'appareil comprend un compresseur à jets (11) combiné à une chambre à temps de séjour (12), dans laquelle l'huile contaminée est intimement mélangée à de l'air ou à un gaz inerte provenant d'une source (19) à une température élevée, de façon à permettre des transferts de chaleur et de masse ainsi qu'un transfert des agents contaminants de la phase huileuse à la phase gazeuse. Le mélange est ensuite vaporisé à l'intérieur d'un tambour de dégagement (14), dans lequel le gaz se sépare de l'huile, le gaz étant alors saturé à 95 - 100 % d'agents contaminants. Ce gaz est ensuite purgé, emportant avec lui les liquides et les gaz de contamination volatils, et l'huile décontaminée est alors renvoyée vers le réservoir (1) en partant du fond du tambour de dégagement (14).

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