Electrostatic coalescence system with independent ac and dc hydrophilic electrodes

Henry, J D; Hovarongkura, A D

Title: Electrostatic coalescence system with independent ac and dc hydrophilic electrodes

Full Record
Other Related Research

Abstract

An improved electrostatic coalescence system is provided in which independent ac and dc hydrophilic electrodes are employed to provide more complete dehydration of an oil emulsion. The ac field is produced between an ac electrode array and the water-oil interface wherein the ac electrode array is positioned parallel to the interface which acts as a grounded electrode. The emulsion is introduced into the ac field in an evenly distributed manner at the interface. The ac field promotes drop-drop and drop interface coalescence of the water phase in the entering emulsion. The continuous oil phase passes upward through the perforated ac electrode array and enters a strong dc field produced between closely spaced dc electrodes in which small dispersed droplets of water entrained in the continuous phase are removed primarily by collection at hydrophilic dc electrodes. Large droplets of water collected by the electrodes migrate downward through the ac electrode array to the interface. All phase separation mechanisms are utilized to accomplish more complete phase separation.

Inventors:: Henry, J D; Hovarongkura, A D

Publication Date:: Tue Feb 24 00:00:00 EST 1981

OSTI Identifier:: 6490697

Patent Number(s):: US 4252631

Assignee:: Department of Energy

Resource Type:: Patent

Resource Relation:: Patent File Date: Filed date 9 Jan 1980; Other Information: PAT-APPL-110738

Country of Publication:: United States

Language:: English

Subject:: 02 PETROLEUM; EMULSIONS; DEHYDRATION; PETROLEUM; ELECTROSTATIC SEPARATION; COALESCENCE; ELECTRODES; SEPARATION PROCESSES; WATER; COLLOIDS; DISPERSIONS; ENERGY SOURCES; FOSSIL FUELS; FUELS; HYDROGEN COMPOUNDS; OXYGEN COMPOUNDS; 022000* - Petroleum- Transport, Handling, & Storage

Citation Formats


                    Henry, J D, and Hovarongkura, A D. Electrostatic coalescence system with independent ac and dc hydrophilic electrodes.  United States: N. p., 1981. 
        Web.

Copy to clipboard


                    Henry, J D, & Hovarongkura, A D. Electrostatic coalescence system with independent ac and dc hydrophilic electrodes.  United States.

Copy to clipboard


                    Henry, J D, and Hovarongkura, A D. 1981.  
        "Electrostatic coalescence system with independent ac and dc hydrophilic electrodes".  United States.

Copy to clipboard


                    
@article{osti_6490697,

  title        = {Electrostatic coalescence system with independent ac and dc hydrophilic electrodes},

  author       = {Henry, J D and Hovarongkura, A D},

  abstractNote = {An improved electrostatic coalescence system is provided in which independent ac and dc hydrophilic electrodes are employed to provide more complete dehydration of an oil emulsion. The ac field is produced between an ac electrode array and the water-oil interface wherein the ac electrode array is positioned parallel to the interface which acts as a grounded electrode. The emulsion is introduced into the ac field in an evenly distributed manner at the interface. The ac field promotes drop-drop and drop interface coalescence of the water phase in the entering emulsion. The continuous oil phase passes upward through the perforated ac electrode array and enters a strong dc field produced between closely spaced dc electrodes in which small dispersed droplets of water entrained in the continuous phase are removed primarily by collection at hydrophilic dc electrodes. Large droplets of water collected by the electrodes migrate downward through the ac electrode array to the interface. All phase separation mechanisms are utilized to accomplish more complete phase separation.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/6490697},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Feb 24 00:00:00 EST 1981},

  month        = {Tue Feb 24 00:00:00 EST 1981}

}

Copy to clipboard

Patent:

Search for the full text at the U.S. Patent and Trademark Office

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Electrostatic coalescence system with independent AC and DC hydrophilic electrodes

Patent Hovarongkura, A

An improved electrostatic coalescence system is provided in which independent AC and DC hydrophilic electrodes are employed to provide more complete dehydration of an oil emulsion. The AC field is produced between an AC electrode array and the water-oil interface wherein the AC electrode array is positioned parallel to the interface which acts as a grounded electrode. The emulsion is introduced into the AC field in an evenly distributed manner at the interface. The AC field promotes drop-drop and drop-interface coalescence of the water phase in the entering emulsion. The continuous oil phase passes upward through the perforated AC electrodemore »« less
Full Text Available
Improved electrostatic coalescense system with independent ac and dc hydrophilic electrodes. [Patent application]

Patent Hovarongkura, A; Henry, Jr, J

An improved electrostatic coalescence system is provided in which independent AC and DC hydrophilic electrodes are employed to provide more complete dehydration of an oil emulsion. The AC field is produced between an AC electrode array and the water-oil interface wherein the AC electrode array is positioned parallel to the interface which acts as a grounded electrode. The emulsion is introduced into the AC field in an evenly distributed manner at the interface. The AC field promotes drop-drop and drop-interface coalescence of the water phase in the entering emulsion. The continuous oil phase passes upward through the perforated AC electrodemore »« less
Development of a process for ash removal from coal-derived liquids based on particle distribution to an aqueous phase. Final report, March 1, 1976-June 30, 1980

Technical Report Henry, Jr, J

A dispersed water phase can be used to separate mineral matter from coal-derived liquids. A dispersed water phase can either be used to fully distribute the particles to that phase, to collect them at the water/oil interface, or to act as a bridging medium for further agglomeration. Extensive studies were conducted on mineral matter removal from solvent-refined coal. The mineral matter in coal-derived liquids has an asphaltic and preasphaltic coating which dominates its wetting characteristics. This was confirmed by three phase contact angle measurements and the electrical charge characteristics of the mineral matter in solvent-refined coal. Either surfactant wetting agentsmore »« less
New electrostatic technology improves water separation from emulsions

Conference Manning, D; Sams, G

A new technology introduced to the oil producing industry combines electrostatic and centrifugal separation techniques resulting in a coalescence device operable in high water cut emulsions. The equipment can be installed into existing units to de-bottleneck water choked systems or incorporated in new offshore or onshore production facilities. Introduced by NATCO under the name EPICTM (Electro-Pulsed Inductive Coalescer), the devices applies a pulsating DC field across the fluid stream. The dynamics of the electrical flux, voltage and pulse frequency allow optimizing the process to the fluid stream conditions. The use of an insulated electrode allows the unit to function inmore »« less
Enhanced coalescence of emulsion in an electric field

Journal Article Abubakar, A; Bello, J

The separation of emulsions is a fluid processing step which causes major difficulties in several industries; e.g., hydrometallurgy, crude oil operations where routine processing involves stable emulsions with water, and solvent extraction operations. Electric fields offers a simple separation method. The action of an electric field on an emulsion produced effects like drop disintegration and promoted coalescence. High and low field intensities modify droplet displacements due to electrostatic forces. In this investigation a water-in-oil type of emulsion was prepared using distilled water and soap as the surfactant. After mixing, these emulsions were separated under an applied direct current high voltagemore »« less
https://doi.org/10.1080/01496399108050535

Similar Records