Method of removing water and contaminants from crude oil...

C - Chemistry – Metallurgy – 10 – G

Patent

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Details

C10G 33/00 (2006.01) B01D 1/00 (2006.01) B01D 3/06 (2006.01) B01D 17/00 (2006.01) B01D 17/02 (2006.01) C10G 7/04 (2006.01) C10G 33/06 (2006.01) C10G 33/08 (2006.01)

Patent

CA 2364831

A method for contaminant and water removal from crude oil. The method involves recirculating at least a portion of the dewatered crude into a dehydrator. The dehydrator contains a heated dehydrated crude oil and the surface or adjacent thereto is maintained at a temperature sufficient to vaporize any water contacting the surface from crude oil to be treated in the dehydrator. It has been found important to maintain a substantially uniform temperature at or below the vaporizing surface in order to effectively treat crude oil for dewatering purposes. Significant temperature fluctuations are typically realized by dehydrators since heat enthalpy is removed in order to vaporize the water in the crude oil. Such fluctuations lead to process complications and upset and are therefore undesirable. The instant invention recognizes this limitation and substantially reduces foaming and provides for a smoothly running and efficient dehydration process.

Une méthode permettant d'éliminer de l'eau et des contaminants du pétrole brut. La méthode comprend la recirculation d'au moins une partie du pétrole brut déshydraté dans un déshydrateur. Le déshydrateur contient du pétrole brut déshydraté chauffé et la surface ou la surface adjacente est maintenue à une température suffisante pour vaporiser toute l'eau en contact avec la surface du pétrole à traiter dans le déshydrateur. On a trouvé qu'il est important de maintenir une température essentiellement uniforme à la surface de vaporisation ou en-dessous de celle-ci afin de traiter efficacement le pétrole brut à des fins de déshydratation. Des variations importantes de la température sont généralement réalisées par les déshydrateurs puisque l'enthalpie de chaleur est éliminée afin de vaporiser l'eau dans le pétrole brut. Ces variations mènent à des complications du procédé et dérangent et sont par conséquent non souhaitables. La présente invention reconnaît cette limitation et essentiellement diminue le moussage et fournit un fonctionnement en douceur et un procédé de déshydratation efficace.

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