SEQUENTIAL MIXING PROCESS FOR IMPROVED DESALTING

摘要

A process and system for desalting crude oil includes delivering a stream of salty crude oil and wash water into a mixing valve, mixing the stream of salty crude oil and wash water through the mixing valve to create a mixed stream of desalted crude oil and salty wash water, delivering the mixed stream of desalted crude oil and salty wash water to a static mixer, and mixing the mixed stream of crude oil and wash water in the static mixer. Within the static mixer, the mixed stream is mixed in a coalescing regime to coalesce smaller droplets of water into larger droplets of water. The mixed stream is subjected to an electric field to cause additional coalescence before being directed to a desalter where the salty wash water is separated from the desalted crude oil.

主权项

1. A process for desalting crude oil, the process comprising:
delivering a stream into a mixing valve wherein the stream comprises wash water and crude oil having salt in the crude oil; mixing the stream of crude oil and wash water in the mixing valve to create a mixed stream of crude oil and wash water wherein the mixing of the crude oil with the wash water causes the wash water to capture salt from the crude oil to thereby creating desalted crude oil and salty wash water; delivering the mixed stream of crude oil and wash water from the mixing valve to a coalescer mixer; mixing the mixed stream of crude oil and wash water in the coalescer mixer; delivering the mixed stream of crude oil and wash water to settling vessel; separating the salty wash water from the desalted crude oil in the settling vessel; and subjecting the mixed stream of crude oil and wash water to an electric field downstream of the mixing valve and upstream of the settling vessel.