US 12,268,993 B2
Electrodialysis device for the desalination of water for oil and gas applications
Alexandre Goldszal, L'Etang la Ville (FR); Matthieu Jacob, Cescau (FR); David Tvrzník, Liberec (CZ); and Luboš Novák, Ceská Lípa (CZ)
Assigned to TotalEnergies OneTech, Courbevoie (FR); MEGA A.S., Prague (CZ); and MEMBRAIN S.R.O., Straz pod Ralskem (CZ)
Appl. No. 17/046,283
Filed by TotalEnergies OneTech, Courbevoie (FR); MEGA A.S., Prague (CZ); and MEMBRAIN S.R.O., Straz pod Ralskem (CZ)
PCT Filed Apr. 13, 2018, PCT No. PCT/IB2018/000467
§ 371(c)(1), (2) Date Oct. 8, 2020,
PCT Pub. No. WO2019/197853, PCT Pub. Date Oct. 17, 2019.
Prior Publication US 2021/0069646 A1, Mar. 11, 2021
Int. Cl. B01D 61/46 (2006.01); B01D 61/42 (2006.01); B01D 61/50 (2006.01); B01D 63/08 (2006.01); C02F 1/469 (2023.01); C02F 101/30 (2006.01); C02F 103/06 (2006.01); C02F 103/08 (2006.01); C02F 103/10 (2006.01); E21B 43/20 (2006.01); E21B 43/34 (2006.01)
CPC B01D 61/463 (2022.08) [B01D 61/422 (2013.01); B01D 61/464 (2022.08); B01D 61/50 (2013.01); B01D 63/0822 (2022.08); C02F 1/4693 (2013.01); E21B 43/20 (2013.01); E21B 43/34 (2013.01); B01D 2313/025 (2013.01); B01D 2313/04 (2013.01); B01D 2313/14 (2013.01); B01D 2313/23 (2013.01); C02F 2101/30 (2013.01); C02F 2103/06 (2013.01); C02F 2103/08 (2013.01); C02F 2103/10 (2013.01); C02F 2209/09 (2013.01); Y02A 20/124 (2018.01)] 11 Claims
OG exemplary drawing
 
1. An electrodialysis device for desalination of water in an oil and gas environment, the electrodialysis device comprising:
a membrane stack comprising alternating cation- and anion-exchange membranes; and
a plurality of spacers, each spacer being arranged between two successive membranes and having a thickness;
wherein at least one of the spacers comprises a recessed area and a non-recessed area, the non-recessed area surrounding the recessed area,
and wherein:
the spacer comprises a central opening within the recessed area, wherein the central opening has a peripheral edge;
the spacer is provided with at least four orifices within the non-recessed area;
the spacer is provided with respective channels extending from at least two of the orifices to the peripheral edge of the central opening, each channel comprising (i) a first portion located in the recessed area and extending to the peripheral edge of the central opening and (ii) a second portion located in the non-recessed area; and
a cation-exchange or anion-exchange membrane is accommodated in the recessed area;
wherein the entire first portion of each channel runs through the entire thickness of the spacer, and the entire second portion of each channel runs through only part of the thickness of the spacer.