公开(公告)号：US20210069645A1

公开(公告)日：2021-03-11

申请号：US16978985

申请日：2019-03-12

Applicant: BL TECHNOLOGIES, INC.

Inventor： Chengqian ZHANG ,  Wei LU ,  Jiyang XIA ,  Yongchang ZHENG ,  Bruce BATCHELDER ,  John H. BARBER

IPC: B01D61/44 ,  B01D61/46 ,  B01D69/02 ,  C02F1/469

Abstract: A bipolar electrodialysis (BPED) cell is able to bipolar convert salt solutions into acid and base solutions. However, protons migrate through the anion exchange membranes and tend to neutralize the base solution. In a bipolar electrodialysis system described herein, multiple BPED cells are arranged to provide a multi-stage treatment system. Up to half, or up to one third, of the stages have cells with acid block anion membranes. The one or more stages with acid block anion membranes are located at the acid product output end of the system, where the acid concentration in the system is the highest. Replacing the traditional anion membranes in some of the stages with acid block anion membranes allows higher concentration products to be produced with moderate increase in energy consumption.

公开(公告)号：US20190024492A9

公开(公告)日：2019-01-24

申请号：US14428138

申请日：2013-08-19

Applicant: BL TECHNOLOGIES, INC.

Inventor： Jiyang XIA

IPC: E21B43/40 ,  C02F9/00 ,  E21B43/24

Abstract: Produced water, for example from a steam assisted gravity drainage (SAGD) or cyclic steam stimulation (CSS) heavy oil recovery operation, is treated to recover water that is re-used to create steam. The produced water is treated in one or more thermal treatment devices such as an evaporator and a crystallizer. The thermal treatment device is seeded, for example with a calcium or magnesium salt. The thermal treatment device produces a blowdown or slurry comprising super-saturated solids and organic compounds. A solvent is added to the blowdown or slurry. The solids precipitate and are separated from the blowdown or slurry. The solvent may be recovered for re-use in treating more blowdown or slurry.