EDGE Desalters/Dehydrators

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Product Literature

EDGE™

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EDGE (Enhanced Deep-Grid Electrical) desalters and dehydrators utilize a unique technology that provides the most effective solution for removal of contaminants such as sodium, calcium and magnesium chloride from crude oil. If not removed, these salts will hydrolyze to form hydrochloric acid which is the primary cause of corrosion failures within crude unit equipment.

EDGE desalters/dehydrators utilize AC-type electrostatic coalescing for the efficient removal of contaminants. Electrostatic coalescing is accomplished when the electrode grids apply a high voltage to the oil/water mixture, forcing it to separate. As the water is washed out, so are many of the undesirable solids.

           

The EDGE™ Design

EDGE™ Technology is available in two different designs, the EDGE and EDGE II, which provide desalter options for optimization to individual applications. This design minimizes transactor (electric power supply) capacity and power consumption. It also includes three electrified electrode grids to maximize the desalting performances and feedstock capacity of the desalter vessel. EDGE™ desalters are designed to optimize the recommended demulsifier and solids-wetting chemicals of most chemical suppliers.

EDGE™ technology provides optimized performance resulting in greater long term value:

  • Reduced salt carryover that results in minimized corrosion, chemical costs, equipment fouling, maintenance costs and unplanned shutdowns
  • Decreased water carryover that leads to lower energy costs, stabilized unit operations, increased crude throughput, minimized slop oil production and reduced waste water treatment costs
  • Minimized oil undercarry that results in reduced product losses and slop treatment costs
  • Reduced solids carryover that leads to less equipment fouling and foaming
  • Less power consumption resulting from inlet distributor injection of crude/water emulsion and control of interface emulsion.
  • Solid Steel rod electrodes provide long service life and are uneffected by high concentrations of O2
  • ISO certified by DNV
  • Pilot Plant 
  • Extensive user list 
  • New Patents
  • Technology is in operation on all inhabitable continents

Vessel

The entire hydrocarbon volume of the vessel is exposed to high voltage AC electrical fields. Four contiguous AC electrical fields span from the oil/water interface to the top of the vessel.

Mulitple Electric Fields

High Voltage Entrance System

This voltage entrance system is doubly protected by two bushings located in the oil-filled housing.

Transactor

Optimized performance results from variable transactor secondary voltage levels that provide flexibility at varying operating conditions.

Inlet Header

Even distribution of the oil/water emulsion across the entire vessel length produces a laminar profile. This emulsion is injected just above the oil/water interface, thereby maximizing crude oil residence time and improving upset tolerance.

Specialty Water Header Design

This header withdraws water and some solids along the entire length of the vessel, thus maximizing water-phase residence time and reducing the oil content of the effluent water.

Mud Wash Header

Spray nozzles are utilized in the unique mud wash headers design to effectively fluidize solids accumulated in the bottom of the vessel. 

EDGE™ II- Dependable Steady State Operation

A leader in the desalter and dehydration markets, EDGE™ ll is designed specifically for the treatment of the most difficult feed stocks at higher throughput rates.

EDGE™ II technology provides optimized performance resulting in greater long term value:

  • Reduced salt carryover that results in minimized corrosion, chemical costs, equipment fouling, maintenance costs and unplanned shutdowns
  • Decreased water carryover that leads to lower energy costs, stabilized unit operations, increased crude throughput, minimized slop oil production and reduced waste water treatment costs
  • Minimized oil undercarry that results in reduced product losses and slop treatment costs
  • Reduced solids carryover that leads to less equipment fouling and foaming
  • Less power consumption resulting from rapid resolution of emulsions and unique electrode configuration

Oil Distributor (Inlet Header)

Dual horizontal flow distribution provides quick, complete coalescence, insuring larger droplets and faster settling. This unique design offers improved laminar flow, providing an enhanced water droplet environment for emulsion sensitive crude oil.

High level distribution allows for 2-3 times the volume of water/oil emulsion, compared to other vertical flow desalters, improving the control of the interface (rag) emulsion and effluent water quality.

Electrode Configuration

Three electrode grid design provides flexibility to handle upsets and long run cycle between shut-downs for maintenance. Transformer connection and phasing allows for little to no loss in performance due to loss of one energized electrode. Lower electrode provides high intensity electric field to interface for continuous resolution of rag emulsion enhancing ease of interface control and chemical reduction. Solid steel rod electrodes insure long life and ease of maintenance.

Mud Wash Header

Spray nozzles are utilized in the efficient mud wash header design to effectively fluidize solids accumulated in the bottom of the vessel.

The EDGE™ ll Design

EDGE™ ll is available in different designs providing multiple options for optimization of individual applications. Options to energize 1, 2 or 3 electrodes are based on power available. This design offers distribution and electrode locations that can vary, depending on processing requirements and specific operational needs. EDGE™ ll maximizes the desalting performance and feedstock capacity while minimizing demulsifier and solids-wetting chemicals of most chemical suppliers. The EDGE™ II is designed for processing:

  • Heavy/ high viscosity oil
  • Crude oil high in solids content
  • Synthetically produced oil
  • Emulsion sensitive feed stocks
  • Higher throughput rates in existing vessels
  • Greater flexibility in changing feedstocks 

 

 


EDGE™ II

  • Designed specifically for difficult to treat crude oils
  • Dual Flow Distribution for faster coalescing of water droplets in high viscosity oil
  • Unique distribution design allows for more uniform laminar flow pattern
  • Electrode design to reduce power consumption and improve performance
  • High water interface allows maximum residence time of interface emulsion thus improving effluent water quality and reducing chemical requirements