公开(公告)号：US09180411B2

公开(公告)日：2015-11-10

申请号：US13624853

申请日：2012-09-21

Applicant: Chevron U.S.A. Inc.

Inventor： Prakhar Prakash ,  James Craig Pauley ,  Randall B. Pruet

IPC: B01D61/36 ,  B01D61/14 ,  B01D61/58 ,  C02F1/463 ,  C02F9/00 ,  B01D61/00 ,  B01D63/02 ,  B01D71/02 ,  C02F1/44

CPC classification number: B01D61/364 ,  B01D61/002 ,  B01D61/145 ,  B01D61/58 ,  B01D63/02 ,  B01D71/024 ,  C02F1/444 ,  C02F1/445 ,  C02F1/447 ,  C02F1/463 ,  C02F9/00 ,  C02F2209/06 ,  C02F2209/10 ,  C02F2209/20 ,  Y10T29/494

Abstract: The invention relates to the treatment of water, including for example treatment in connection with hydrocarbon production operations. Silica in water produces undesirable scaling in processing equipment, which causes excess energy usage and maintenance problems. Electrocoagulation (EC) at relatively high water temperature, followed by any of membrane distillation or forward osmosis (FO), may be combined with a subsequent process of ceramic ultra-filtration (UF filtration) employed to treat water. Water to be treated may be produced water that has been pumped from a subterranean reservoir. The treated water may be employed to generate steam. The treatment units (e.g., EC, forward osmosis, UF filtration, etc) can be configured into one system as an on-site installation or a mobile unit for on-site or off-site water treatment.

Abstract translation: 本发明涉及水的处理，包括例如与碳氢化合物生产操作有关的处理。 水中的二氧化硅在加工设备中产生不希望的结垢，这导致过多的能量消耗和维护问题。 在较高的水温下进行电凝（EC），随后进行膜蒸馏或正向渗透（FO）的任何处理，都可以与用于处理水的陶瓷超滤（UF过滤）的后续工艺相结合。 待处理的水可以产生已经从地下储层泵送的水。 处理过的水可用于产生蒸汽。 处理单元（例如EC，正向渗透，UF过滤等）可以被配置成一个系统作为现场安装或用于现场或非现场水处理的移动单元。

公开(公告)号：US10399880B2

公开(公告)日：2019-09-03

申请号：US15902090

申请日：2018-02-22

Applicant: Chevron U.S.A. Inc.

Inventor： Prakhar Prakash ,  Gini Yash Shah ,  Evan Shigeto Hatakeyama

IPC: C02F9/00 ,  B01D61/36 ,  B01D61/02 ,  B01D61/14 ,  B01D61/58 ,  B01D61/04 ,  B01D61/16 ,  C02F1/44 ,  C02F1/42 ,  C02F1/20 ,  C02F1/463 ,  C02F1/465 ,  C02F1/24

Abstract: A system for treating high temperature produced water includes an electrocoagulation unit, a membrane distillation unit in communication with the outlet of the electrocoagulation unit having a hydrophobic membrane with a feed side for receiving the produced water stream and a product side for receiving a deionized water stream. A heat recovery heat exchanger is in communication with the membrane distillation unit for receiving two streams, one from each side of the hydrophobic membrane, such that heat is exchanged between the two streams. A line leaving the heat exchanger returns a heated stream from the heat exchanger to a location in a line upstream of the membrane distillation unit. A brine tank in communication with the membrane distillation unit receives a portion of a stream from the membrane product side and contains a concentrated brine solution containing the portion of the stream from the membrane product side and sodium chloride.

公开(公告)号：US20180179096A1

公开(公告)日：2018-06-28

申请号：US15902090

申请日：2018-02-22

Applicant: Chevron U.S.A. Inc.

Inventor： Prakhar Prakash ,  Gini Yash Shah ,  Evan Shigeto Hatakeyama

IPC: C02F9/00

CPC classification number: C02F9/00 ,  B01D61/025 ,  B01D61/04 ,  B01D61/145 ,  B01D61/147 ,  B01D61/16 ,  B01D61/364 ,  B01D61/58 ,  B01D2311/04 ,  B01D2311/06 ,  B01D2311/10 ,  B01D2311/25 ,  C02F1/20 ,  C02F1/24 ,  C02F1/42 ,  C02F1/441 ,  C02F1/444 ,  C02F1/447 ,  C02F1/463 ,  C02F1/465 ,  C02F2001/425 ,  C02F2303/16 ,  Y02A20/131 ,  B01D2311/12 ,  B01D2311/18 ,  B01D2311/2642 ,  B01D2311/26 ,  B01D2311/2623

Abstract: A system for treating high temperature produced water includes an electrocoagulation unit, a membrane distillation unit in communication with the outlet of the electrocoagulation unit having a hydrophobic membrane with a feed side for receiving the produced water stream and a product side for receiving a deionized water stream. A heat recovery heat exchanger is in communication with the membrane distillation unit for receiving two streams, one from each side of the hydrophobic membrane, such that heat is exchanged between the two streams. A line leaving the heat exchanger returns a heated stream from the heat exchanger to a location in a line upstream of the membrane distillation unit. A brine tank in communication with the membrane distillation unit receives a portion of a stream from the membrane product side and contains a concentrated brine solution containing the portion of the stream from the membrane product side and sodium chloride.

公开(公告)号：US09932257B2

公开(公告)日：2018-04-03

申请号：US15223938

申请日：2016-07-29

Applicant: Chevron U.S.A. Inc.

Inventor： Prakhar Prakash ,  Gini Chauhan ,  Evan Shigeto Hatakeyama

IPC: C02F1/44 ,  C02F1/42 ,  C02F1/20 ,  C02F1/465 ,  B01D61/36 ,  C02F1/463 ,  B01D61/58 ,  B01D61/14 ,  B01D61/02 ,  C02F9/00 ,  C02F103/10

CPC classification number: C02F9/00 ,  B01D61/025 ,  B01D61/04 ,  B01D61/145 ,  B01D61/147 ,  B01D61/16 ,  B01D61/364 ,  B01D61/58 ,  B01D2311/04 ,  B01D2311/06 ,  B01D2311/10 ,  B01D2311/25 ,  C02F1/20 ,  C02F1/42 ,  C02F1/441 ,  C02F1/444 ,  C02F1/447 ,  C02F1/463 ,  C02F1/465 ,  C02F2001/425 ,  C02F2103/10 ,  C02F2303/16 ,  B01D2311/12 ,  B01D2311/18 ,  B01D2311/2642 ,  B01D2311/26 ,  B01D2311/2623

Abstract: A process treats high temperature produced water by passing a stream to an electrocoagulation unit and then to a membrane distillation (MD) unit where the stream contacts a hydrophobic membrane on a feed side and deionized water contacts the membrane on a product side. A distilled water stream is recovered and collected with the product side stream to form a volume-depleted exit produced water stream on the feed side of the hydrophobic membrane. The exit product side stream is passed through a heat exchanger to form a stream that is returned to a location upstream of the MD unit for an additional pass through the MD unit, thereby recovering additional water. The stream can be returned multiple times to achieve high recovery and to form a final stream leaving the MD unit having a temperature from 40-60 ° C., a total oil and grease content no greater than 500 mg/L, and a suspended solids content no greater than 200 mg/L. A portion of the distilled water stream from the membrane distillation unit can be used to form a brine solution used to regenerate used ion exchange resin in a water softening system.

公开(公告)号：US20180029910A1

公开(公告)日：2018-02-01

申请号：US15223938

申请日：2016-07-29

Applicant: Chevron U.S.A. Inc.

Inventor： Prakhar Prakash ,  Gini Chauhan ,  Evan Shigeto Hatakeyama

IPC: C02F9/00 ,  C02F1/42 ,  C02F1/20 ,  C02F1/465 ,  B01D61/02 ,  B01D61/14 ,  B01D61/58 ,  C02F1/463 ,  C02F1/44 ,  B01D61/36

CPC classification number: C02F9/00 ,  B01D61/025 ,  B01D61/04 ,  B01D61/145 ,  B01D61/147 ,  B01D61/16 ,  B01D61/364 ,  B01D61/58 ,  B01D2311/04 ,  B01D2311/06 ,  B01D2311/10 ,  B01D2311/25 ,  C02F1/20 ,  C02F1/42 ,  C02F1/441 ,  C02F1/444 ,  C02F1/447 ,  C02F1/463 ,  C02F1/465 ,  C02F2001/425 ,  C02F2103/10 ,  C02F2303/16 ,  B01D2311/12 ,  B01D2311/18 ,  B01D2311/2642 ,  B01D2311/26 ,  B01D2311/2623

Abstract: A process treats high temperature produced water by passing a stream to an electrocoagulation unit and then to a membrane distillation (MD) unit where the stream contacts a hydrophobic membrane on a feed side and deionized water contacts the membrane on a product side. A distilled water stream is recovered and collected with the product side stream to form a volume-depleted exit produced water stream on the feed side of the hydrophobic membrane. The exit product side stream is passed through a heat exchanger to form a stream that is returned to a location upstream of the MD unit for an additional pass through the MD unit, thereby recovering additional water. The stream can be returned multiple times to achieve high recovery and to form a final stream leaving the MD unit having a temperature from 40-60° C., a total oil and grease content no greater than 500 mg/L, and a suspended solids content no greater than 200 mg/L. A portion of the distilled water stream from the membrane distillation unit can be used to form a brine solution used to regenerate used ion exchange resin in a water softening system.