Multi-Phase AC/DC Electrostatic Desalter

Efficient & Fast Salt Removal

Achieve Extreme Desalting Performance with OTSO's Multi-Phase (AC/DC) Electrostatic Desalter

Be it in the field or at the refinery, our Multi-Phase Electrostatic Desalter is up for the task.  Over the past several decades, and long before OTSO’s existence, our team has been involved in the sizing, design, engineering, fabrication and installation of hundreds of Electrostatic Desalters and Treaters.   This vast experience is the cornerstone of OTSO’s expertise in the electrostatic arena.

The Multi-Phase Electrostatic Desalter is the clear go to option for high volume salt removal across all types of crudes in the field or refinery setting.  It’s worth noting, Multi-Phase Electrostatic Desalters perform remarkably well in refineries due to their ability to process some of the most difficult grades of crude the world has to offer.

Combining AC & DC fields for Superior Performance

OTSO combines the AC and DC fields for increased through-put and salt removal. To establish the DC field, both plates are connected to the same AC transformer terminal via diodes. The plates are then charge throughout half of the AC cycle and capacitive storage is used to maintain charge between cycles. An additional AC field is created between the plate edges and oil / water interface, as well as between the plates and vessel walls. This distinctive combination produces an electrostatic desalter capable of handling all drop sizes, thereby increasing throughput and salt removal.

The Ultimate Desalting Solution

The Multi-Phase Electrostatic Desalter is OTSO’s flagship desalting solution. The utilization of a single vessel for multiple stage desalting provides unparalleled desalting proficiency. This is achieved through carbon or composite electrodes, voltage profile programming, crosscurrent flow and electrostatic mixing.

Complete Droplet Capture with Electrostatic Strength Variations

The ideal electrical field strength fluctuates based on droplet size. The coalescing of large droplets requires minimal field strength. In contrast, the coalescing of small droplets requires significant field strength, in fact the field strength needed for small droplets is so powerful it will cause large droplets to fragment into small drops. OTSO solves this issue using a series of cycled electrostatic strength variations. As mixed electrical strengths mix and span across the vessel, all droplet sizes are able to coalesce as each is given the proper field strength.