3/5/2015
GasTech Crude Oil Dehydration and Desalting
Process Engineering • Design • Fabrication
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Crude Oil Dehydrators and Desalters
Filters and Coalescers
Electrostatic desalting is employed for both oil field and refinery applications, to facilitate the removal of inorganic
Filter Elements
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chlorides and watersoluble contaminants from crude oil. In refinery applications, the removal of these watersoluble compounds prevents or minimizes damage to downstream distillation equipment. Click here to learn more.
Process Heaters Gas Dehydrators Fuel Gas Conditioners Separators Liquid Recovery
Conventional AC Electrostatic Dehydrator/Desalter The conventional AC (Alternating Current) electrostatic dehydration system is an efficient method to remove high salinity formation water from the crude oil stream. This process relies on establishing a high voltage AC electrical field in the oil phase of dehydrator/desalter vessels. The electrical field imposes an electrical charge on water droplets entrained in the oil stream, thus causing them to oscillate as they pass through the electrodes.
Oxidizers and RegeneDizers Sweetening Units Desalters
During this oscillation the droplets are stretched or elongated and then contracted during reversal of the imposing AC electrical field. During this agitation the water droplets comingle and coalesce into droplets of sufficient size to migrate, by gravity, back into the lower water phase of the vessel for disposal.
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CONVENTIONAL AC ELECTRODE FIELD Several modifications are available to enhance the conventional AC electrostatic system. These modifications include: Doublehot electrode system: apply power to the two electrodes Triplehot electrode system: apply power to the three electrodes Systems tailored to the project specific requirements
Electrostatic AC/DC Dual Wave Dehydrator/Desalter GasTech's Dual Wave design utilizes both alternating and direct current through multiple plates to promote enhanced water extraction and chloride level reduction.
DUAL WAVE AC/DC PLATE TYPE ELECTRODE GasTech's Dual Wave AC/DC system provides the client with the following benefits:
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GasTech Crude Oil Dehydration and Desalting Increased flow rates, resulting in: Smaller vessel footprints Less capital investments
Optimized water removal: Lower quantities of water to the pipeline or storage. Less demulsifier chemical Less internal corrosion
Lower operating temperatures: Conserves oil gravity and volume
STANDARD FEATURES
OPTIONS
Inlet diffuser manifold
Sandjetting system
Antivortex water collector
Inverted sand troughs
Antivortex drains
Interface sludge drawoffs
Oil collection weir baffle
Matrix packing
Open bottom distributor troughs
AC electrodes
Dry oil collector piping
Steamout system
AC/DC Plate type electrodes
Electrostatic Heater/Treater
The GasTech horizontal heatertreater combines the advantages of emulsion breaking heat with electrostatic dehydration in a single vessel package. The unique thermal section is designed with an inlet shroud for liberating both gas and free water from the emulsion. This flow path allows the free water to separate for disposal, without further heating, resulting in fuel savings for the client. The open bottom distributor troughs provide even dispersal of the heated oil across the entire electrode section for optimum dehydration before being collected for discharge to the pipeline or storage.
GasTech Engineering Corporation 1007 E. Admiral Blvd, Tulsa, OK 74120 Ph. (800) 6856579 or (918) 6638383 Fax (918) 6638460 email
[email protected] © 2001 GasTech Engineering Corporation
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