US 12,257,531 B2
Bi-phase (Scott-T) transformer double voltage AC electrostatic coalescer
Simone Mulas, Dhahran (SA); and Pier Domini, Abqaiq (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Sep. 1, 2023, as Appl. No. 18/459,506.
Application 18/459,506 is a division of application No. 17/453,415, filed on Nov. 3, 2021, granted, now 11,857,895.
Prior Publication US 2023/0405493 A1, Dec. 21, 2023
Int. Cl. B01D 17/06 (2006.01); B01D 17/02 (2006.01); B01D 17/04 (2006.01); B03C 11/00 (2006.01); C10G 33/02 (2006.01)
CPC B01D 17/06 (2013.01) [B01D 17/0214 (2013.01); B01D 17/045 (2013.01); B03C 11/00 (2013.01); C10G 33/02 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method removing water and soluble impurities from a crude oil emulsion comprising:
introducing the crude oil emulsion into an electrostatic coalescer apparatus having a vessel with first and second pairs of electrodes;
generating a homogenous bi-phase AC voltage signal between electrodes of the first and second pairs of electrodes; wherein water present in the emulsion aggregates and separates from the crude oil emulsion by exposure to the high voltage signal within the vessel; and
removing the aggregated water from the vessel of the apparatus,
wherein the homogenous bi-phase AC voltage signal between electrodes of the first pair of electrodes is generated by a first Scott-T transformer circuit and a second and the homogenous bi-phase AC voltage signal between electrodes of the second pair of electrodes is generated by a second Scott-T transformer circuit.