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    Configurations and methods of high pressure acid gas removal in the production of ultra-low sulfur gas
    3.
    发明授权
    Configurations and methods of high pressure acid gas removal in the production of ultra-low sulfur gas 有权

    公开(公告)号：US10384160B2

    公开(公告)日：2019-08-20

    申请号：US15697238

    申请日：2017-09-06

    Applicant: Fluor Technologies Corporation

    Inventor： John Mak

    IPC: B01D19/00 ,  B01D53/14 ,  B01D53/18

    Abstract: Acid gas is removed from a high pressure feed gas that contains significant quantities of CO2 and H2S. In especially preferred configurations and methods, feed gas is contacted in an absorber with a lean and an ultra-lean solvent that are formed by flashing rich solvent and stripping a portion of the lean solvent, respectively. Most preferably, the flash vapors and the stripping overhead vapors are recycled to the feed gas/absorber, and the treated feed gas has a CO2 concentration of less than 2 mol % and a H2S concentration of less than 10 ppmv, and more typically less than 4 ppm.

    Systems and methods for LNG production with propane and ethane recovery
    5.
    发明授权
    Systems and methods for LNG production with propane and ethane recovery 有权

    公开(公告)号：US10330382B2

    公开(公告)日：2019-06-25

    申请号：US15158143

    申请日：2016-05-18

    Applicant: Fluor Technologies Corporation

    Inventor： John Mak ,  Jacob Thomas ,  Curt Graham

    IPC: F25J1/02 ,  F25J1/00 ,  F25J3/02

    Abstract: A LNG liquefaction plant includes a propane recovery unit including an inlet for a feed gas, a first outlet for a LPG, and a second outlet for an ethane-rich feed gas, an ethane recovery unit including an inlet coupled to the second outlet for the ethane-rich feed gas, a first outlet for an ethane liquid, and a second outlet for a methane-rich feed gas, and a LNG liquefaction unit including an inlet coupled to the second outlet for the methane-rich feed gas, a refrigerant to cool the methane-rich feed gas, and an outlet for a LNG. The LNG plant may also include a stripper, an absorber, and a separator configured to separate the feed gas into a stripper liquid and an absorber vapor. The stripper liquid can be converted to an overhead stream used as a reflux stream to the absorber.

    Phase implementation of natural gas liquid recovery plants
    9.
    发明授权
    Phase implementation of natural gas liquid recovery plants 有权

    公开(公告)号：US11112175B2

    公开(公告)日：2021-09-07

    申请号：US15789463

    申请日：2017-10-20

    Applicant: Fluor Technologies Corporation

    Inventor： John Mak

    IPC: F25J3/02

    Abstract: Embodiments relate generally to systems and methods for operating a natural gas liquids plant in ethane rejection and in ethane recovery. A natural gas liquid plant may comprise an absorber configured to produce an ethane rich bottom stream and an ethane depleted vapor stream; a stripper fluidly coupled to the absorber configured to, during ethane rejection, fractionate the ethane rich bottom stream from the absorber into an ethane overhead product and a propane plus hydrocarbons product, and configured to, during ethane recovery, fractionate the ethane rich bottom stream into an ethane plus NGL stream and an overhead vapor stream; and an exchanger configured to, during ethane recovery, counter-currently contact the ethane rich bottom stream from the absorber with the ethane depleted vapor stream from the absorber, thereby heating the vapor stream and chilling the ethane rich bottom stream before the ethane rich bottom stream is fed to the stripper.

    Configurations and methods for small scale LNG production
    10.
    发明授权
    Configurations and methods for small scale LNG production 有权

    公开(公告)号：US11112173B2

    公开(公告)日：2021-09-07

    申请号：US15201070

    申请日：2016-07-01

    Applicant: Fluor Technologies Corporation

    Inventor： John Mak

    IPC: F25J1/00 ,  F25J5/00 ,  F25J1/02

    Abstract: An LNG plant comprises a cold box and a refrigeration unit fluidly coupled with a plurality of heat exchanger passes in the cold box. The refrigeration unit is configured to provide a first refrigerant stream to a first heat exchanger pass of the plurality of heat exchanger passes at a first pressure, a second refrigerant stream to a second heat exchanger pass at a second pressure, and a third refrigerant stream to a third heat exchanger pass at a third pressure. The second refrigerant stream comprises a first portion of the first refrigerant stream, and the third refrigerant stream comprises a second portion of the first refrigerant stream. The second pressure and the third pressure are both below the first pressure. The cold box is configured to produce LNG from a natural gas feed stream to the cold box using a refrigeration content from the refrigeration unit.

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