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    Osmotic desalination methods and associated systems
    41.
    发明授权
    Osmotic desalination methods and associated systems 有权

    公开(公告)号：US10518221B2

    公开(公告)日：2019-12-31

    申请号：US15747907

    申请日：2016-07-29

    Applicant: Gradiant Corporation

    Inventor： Looh Tchuin Choong ,  Prakash Narayan Govindan ,  Maximus G. St. John ,  Steven Lam ,  Jonn-Ross Andrews ,  Karim M. Chehayeb

    IPC: B01D61/58 ,  B01D61/00 ,  B01D61/02 ,  C02F1/44 ,  C02F103/08

    Abstract: Provided herein are osmotic desalination methods and associated systems. According to certain embodiments, multiple osmotic membranes may be used to perform a series of osmosis steps, such that an output stream having a relatively high water purity—compared to a water purity of an aqueous feed stream—is produced. In some embodiments, multiple draw streams can be used to produce aqueous product streams having sequentially higher purities of water. Certain embodiments are related to osmotic desalination systems and methods in which forward osmosis is used to produce a first product stream having a relatively high water purity relative to an aqueous feed stream, and reverse osmosis is used to perform a second step (and/or additional steps) on the first product stream. In some embodiments, multiple reverse osmosis steps can be used in series to perform a net desalination process.

    Production of ultra-high-density brines using transiently-operated desalination systems
    42.
    发明授权
    Production of ultra-high-density brines using transiently-operated desalination systems 有权

    公开(公告)号：US10479701B2

    公开(公告)日：2019-11-19

    申请号：US15967273

    申请日：2018-04-30

    Applicant: Gradiant Corporation

    Inventor： Prakash Narayan Govindan ,  Maximus G. St. John ,  Steven Lam ,  Mark Zaloudek ,  Karim M. Chehayeb ,  Samar Shah

    IPC: C02F1/10 ,  C02F1/08 ,  C02F5/02 ,  C02F1/66 ,  B01D3/34 ,  B01D17/02 ,  C02F1/52 ,  B01D3/16 ,  C02F103/08 ,  C02F103/10 ,  C02F101/10 ,  C02F101/32 ,  C02F101/12 ,  C02F1/00

    Abstract: Systems and methods related to desalination systems are described herein. According to some embodiments, the desalination systems are transiently operated and/or configured to facilitate transient operation. In some embodiments, a liquid stream comprising water and at least one dissolved salt is circulated through a fluidic circuit comprising a desalination system. In some embodiments, a portion of the desalination system (e.g., a humidifier) is configured to remove at least a portion of the water from the liquid stream to produce a concentrated brine stream enriched in the dissolved salt. In certain cases, the concentrated brine stream is recirculated through the fluidic circuit until the concentrated brine stream reaches a relatively high density (e.g., at least about 10 pounds per gallon) and/or a relatively high salinity (e.g., a total dissolved salt concentration of at least about 25 wt %). In certain embodiments, additional salt is added to the concentrated brine stream to produce an ultra-high-density brine stream (e.g., a brine stream having a density of at least about 11.7 pounds per gallon). Some aspects relate to a system that is configured to promote energy efficiency by recovering heat from the recirculated concentrated brine stream upon discharge from the fluidic circuit.

    HUMIDIFICATION-DEHUMIDIFICATION DESALINATION SYSTEMS AND METHODS
    43.
    发明申请
    HUMIDIFICATION-DEHUMIDIFICATION DESALINATION SYSTEMS AND METHODS 审中-公开

    公开(公告)号：US20190329152A1

    公开(公告)日：2019-10-31

    申请号：US16382307

    申请日：2019-04-12

    Applicant: Gradiant Corporation

    Inventor： Prakash Narayan Govindan ,  Maximus G. St. John ,  Steven Lam

    IPC: B01D5/00 ,  C02F1/10 ,  C02F1/04 ,  B01D1/14

    Abstract: Embodiments described herein generally relate to humidification-dehumidification desalination systems, including apparatuses that include a vessel comprising a humidification region (e.g., a bubble column humidification region) and a dehumidification region (e.g., a bubble column dehumidification region), mobile humidification-dehumidification (HDH) desalination systems (e.g., systems having a relatively low height and/or a relatively small footprint), and associated systems and methods. Certain embodiments generally relate to methods of operating, controlling, and/or cleaning desalination systems comprising a plurality of desalination units (e.g., HDH desalination units).

    SYSTEMS INCLUDING AN APPARATUS COMPRISING BOTH A HUMIDIFICATION REGION AND A DEHUMIDIFICATION REGION WITH HEAT RECOVERY AND/OR INTERMEDIATE INJECTION
    48.
    发明申请
    SYSTEMS INCLUDING AN APPARATUS COMPRISING BOTH A HUMIDIFICATION REGION AND A DEHUMIDIFICATION REGION WITH HEAT RECOVERY AND/OR INTERMEDIATE INJECTION 审中-公开
    包括包含湿度区域的装置和具有热回收和/或中间注入的去湿区域的系统

    公开(公告)号：US20160339357A1

    公开(公告)日：2016-11-24

    申请号：US14718510

    申请日：2015-05-21

    Applicant: Gradiant Corporation

    Inventor： Prakash Narayan Govindan ,  Steven Lam ,  Maximus G. St. John

    IPC: B01D5/00 ,  C02F1/10 ,  B01D1/14

    CPC classification number: B01D5/006 ,  B01D1/14 ,  B01D3/343 ,  B01D3/346 ,  B01D5/003 ,  B01D5/0039 ,  C02F1/10 ,  C02F2103/08 ,  Y02A20/128 ,  Y02P70/34 ,  Y02W10/37

    Abstract: Embodiments described herein generally relate to apparatuses that include a vessel comprising a humidification region (e.g., a bubble column humidification region) and a dehumidification region (e.g., a bubble column dehumidification region), and associated systems and methods. In certain embodiments, the apparatuses are configured to include various internal features, such as vapor distribution regions and/or liquid flow control weirs and/or baffles. In some cases, the apparatuses are used in water purification systems, such as desalination systems. The water purification systems may comprise additional devices external to the apparatuses, such as one or more heat exchangers, one or more heating devices, and/or one or more cooling devices.

    Abstract translation: 本文描述的实施方案一般涉及包括包含加湿区域（例如，气泡塔加湿区域）和除湿区域（例如气泡塔除湿区域）的容器的装置以及相关的系统和方法。 在某些实施例中，设备被配置为包括各种内部特征，例如蒸汽分配区域和/或液体流动控制堰和/或挡板。 在一些情况下，这些装置用于水净化系统，例如脱盐系统。 水净化系统可以包括装置外部的附加装置，诸如一个或多个热交换器，一个或多个加热装置和/或一个或多个冷却装置。

    SYSTEMS INCLUDING AN APPARATUS COMPRISING BOTH A HUMIDIFICATION REGION AND A DEHUMIDIFICATION REGION
    49.
    发明申请
    SYSTEMS INCLUDING AN APPARATUS COMPRISING BOTH A HUMIDIFICATION REGION AND A DEHUMIDIFICATION REGION 审中-公开
    包括包含湿度区域和除湿区域的装置的系统

    公开(公告)号：US20160339356A1

    公开(公告)日：2016-11-24

    申请号：US14718483

    申请日：2015-05-21

    Applicant: Gradiant Corporation

    Inventor： Prakash Narayan Govindan ,  Steven Lam ,  Maximus G. St. John

    IPC: B01D5/00 ,  C02F1/10 ,  B01D1/14

    CPC classification number: B01D5/006 ,  B01D1/14 ,  B01D5/003 ,  C02F1/04 ,  C02F1/10 ,  C02F1/40 ,  C02F1/52 ,  C02F1/66 ,  C02F2101/322 ,  C02F2103/08 ,  Y02A20/128 ,  Y02W10/37

    Abstract: Embodiments described herein generally relate to apparatuses that include a vessel comprising a humidification region (e.g., a bubble column humidification region) and a dehumidification region (e.g., a bubble column dehumidification region), and associated systems and methods. In certain embodiments, the apparatuses are configured to include various internal features, such as vapor distribution regions and/or liquid flow control weirs and/or baffles. In some cases, the apparatuses are used in water purification systems, such as desalination systems. The water purification systems may comprise additional devices external to the apparatuses, such as one or more heat exchangers, one or more heating devices, and/or one or more cooling devices.

    Abstract translation: 本文描述的实施方案一般涉及包括包含加湿区域（例如，气泡塔加湿区域）和除湿区域（例如气泡塔除湿区域）的容器的装置以及相关的系统和方法。 在某些实施例中，设备被配置为包括各种内部特征，例如蒸汽分配区域和/或液体流动控制堰和/或挡板。 在一些情况下，这些装置用于水净化系统，例如脱盐系统。 水净化系统可以包括装置外部的附加装置，诸如一个或多个热交换器，一个或多个加热装置和/或一个或多个冷却装置。

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