公开(公告)号：US20230398493A1

公开(公告)日：2023-12-14

申请号：US18330401

申请日：2023-06-07

Applicant: Danfoss A/S

Inventor： Georg Herborg Enevoldsen

IPC: B01D61/58 ,  B01D61/06 ,  B01D61/00 ,  C02F1/44 ,  B01D61/08 ,  B01D61/10

CPC classification number: B01D61/58 ,  B01D61/06 ,  B01D61/0022 ,  C02F1/445 ,  C02F1/441 ,  B01D61/08 ,  B01D61/10 ,  B01D61/0023 ,  B01D61/005 ,  C02F2103/08

Abstract: A system for reverse osmosis, RO, and for pressure retarded osmosis, PRO, includes: a RO subsystem (10) with a high-pressure RO chamber (11) and a low-pressure RO chamber (12) separated by a RO membrane (13), the high-pressure RO chamber (11) having a RO feed inlet (14) and a brine outlet (15) and the low-pressure RO chamber (12) having a permeate outlet (16); a PRO subsystem (20) with a high-pressure PRO chamber (21) and a low-pressure PRO chamber (22) separated by a PRO membrane (23), the high-pressure PRO chamber (21) having a draw inlet (24) and a draw outlet (25) and the low-pressure PRO chamber (22) having PRO feed inlet (26) and a PRO feed outlet (27); an induction motor (30) having a stator and a rotor, wherein the rotor is mechanically connected to an input shaft of a hydraulic pump (31) configured for providing a feed solution to the RO feed inlet (14) and to an output shaft of a hydraulic motor (32) configured for receiving a draw solution from the draw outlet (25). The invention further discloses a method for operating such system for RO/PRO and to the use of such system.

公开(公告)号：US20220297064A1

公开(公告)日：2022-09-22

申请号：US17696433

申请日：2022-03-16

Applicant: Danfoss A/S

Inventor： Lars Bjarne Hilbrecht ,  Georg Herborg Enevoldsen

IPC: B01D61/06 ,  B01D61/02 ,  B01D61/08 ,  B01D61/12

Abstract: Reverse osmosis (1) system having a first membrane unit (2) and at least a second membrane unit (3), the membrane units (2, 3) forming a chain of membrane units, the first membrane unit (2) having a first membrane (4) separating a first feed chamber (5) and a first permeate chamber (6), a first inlet (7) connected to the first feed chamber (5), a first permeate outlet (9) connected to the first permeate chamber (6), and a first concentrate outlet (8) connected to the first feed chamber (5), the second membrane unit (3) having a second membrane (10) separating a second feed chamber (11) and a second permeate chamber (12), a second inlet (13) connected to the second feed chamber (11), a second permeate outlet (15) connected to the second permeate chamber (12), and a second concentrate outlet (14) connected to the second feed chamber (11), wherein the concentrate outlet (8) of a membrane unit (2) in the chain of membrane units is connected to an inlet (13) of a following membrane unit (3) and a concentrate outlet (14) of at least one membrane unit (3) downstream the first membrane unit (2) in the chain of membrane units is connected to a hydraulic motor (18). In such a system the energy consumption should be optimized. To this end the hydraulic motor (18) is operatively connected to a first electric machine (21).