Mixing method and system for increased coalescence rates in a desalter

摘要

The present invention relates to crude oil-water separation processes, specifically desalting in a petroleum refinery. More particularly, the present invention relates to a method and system for increase coalescence rates of water drops in a desalter.

主权项

1. A method for reducing a salt content of crude oil comprising:
a. dividing the crude oil stream into a first stream and a second stream; b. mixing the first stream with a wash water stream resulting in a first oil/water stream; c. mixing the second stream with a wash water stream resulting in a second oil/water stream; d. combining the first oil/water stream and the second oil/water stream resulting in a mixed oil/water stream; e. routing the mixed oil/water stream to a separator vessel whereby at least a substantial portion of the salt content is absorbed by water in the mixed oil/water stream; f. electrostatically treating the mixed oil/water stream in the separator vessel; g. extracting water from a lower portion of the separator vessel; and h. extracting treated oil from an upper portion of the separator vessel.