Break emulsions to improve performance
Optimally dehydrate crude oil and clean aqueous discharge streams.
NATCO ELECTRO-DYNAMIC DESALTER electrostatic desalting technology provides enhanced multistage mixing in a single vessel. These crude oil desalters combine five technologies in a single, compact, reliable, and effective solution:
The NATCO ELECTRO-DYNAMIC DESALTER technology uses the extremely efficient HiFlo spreader to evenly distribute the incoming wet crude and create a uniform vertical flow upward through the treater. This method eliminates grid bypass and local recirculation areas.
The bulk water and larger water drops are coalesced and separated by gravity in the weaker AC field that exists between the grounded water phase and the electrodes. The stronger DC field between the electrodes causes rapid movement of the remaining small water droplets through electrophoretic attraction, causing the water droplets to collide, coalesce, grow, and settle by gravity.
Improved mixing makes the single-stage desalter as efficient as two conventional AC desalters in series. Washwater is added upstream of the mixing valve in the desalter's inlet piping and countercurrent through the overhead water pipe. The overhead water is added directly between the composite electrodes. The power unit modulates the applied electrostatic field, causing electrodynamic mixing.
The NATCO LRC-II smart interface for dehydration and desalting systems regulates the flow of electric current, providing full power regulation even during process upsets.
Electrostatic crude desalting with multiple phases of mixing, coalescing, and settling in one vessel.
Heavy crude oils and diluted bitumen (dilbit) continue to be challenging to dehydrate for the oil and gas industry.
Mature crude oil fields often contain higher water cuts and higher content of fines. The combination of a large population of water droplets and fines produces very stable crude oil emulsions that are difficult to break.