STORAGE TANK FOR LIQUID HYDROGEN WITH FILL LEVEL INDICATOR

    公开(公告)号:US20230119178A1

    公开(公告)日:2023-04-20

    申请号:US17907494

    申请日:2021-03-29

    申请人: Linde GmbH

    IPC分类号: F17C13/02 F17C13/08

    摘要: A storage tank for liquid hydrogen having an outer tank , an inner tank which is arranged inside the outer tank , and a device for indicating a predefined fill level has been reached with a cell which can be arranged inside the inner tank and is filled with a gas which liquefies when the cell is dipped into the liquid hydrogen , further having a pressure indicator device which indicates a pressure drop in the cell in the case of liquefaction of the gas and therefore indicates the predefined filling level has been reached, and further having a heating element which continuously introduces heat into the gas .

    DEVICE AND METHOD FOR HEATING A FLUID IN A PIPELINE WITH SINGLE-PHASE ALTERNATING CURRENT

    公开(公告)号:US20230098601A1

    公开(公告)日:2023-03-30

    申请号:US17798909

    申请日:2021-02-12

    申请人: BASF SE Linde GmbH

    IPC分类号: H05B3/42

    摘要: An apparatus (100) for heating a fluid is proposed. The apparatus comprises at least one electrically conductive pipeline (112) and/or at least one electrically conductive pipeline segment (114) for receiving the fluid, and at least one single-phase AC power source and/or at least one single-phase AC voltage source (126), each pipeline (112) and/or each pipeline segment (114) being assigned a sin-gle-phase AC power source and/or a single-phase AC voltage source (126) which is connected to the respective pipeline (112) and/or to the respective pipeline segment (114), the respective single-phase AC power source and/or single-phase AC voltage source (126) being designed to generate an electrical current in the respective pipeline (112) and/or in the respective pipeline segment (114), which warms up the respective pipeline (112) and/or the respective pipeline segment (114) by Joulean heat, which is produced when the electrical current passes through conducting pipe material, for heating the fluid, the single-phase AC power source and/or the single-phase AC voltage source (126) being connected to the pipeline (112) and/or the pipeline segment (114) in an electrically conducting manner in such a way that the alternating current generated flows into the pipeline (112) and/or the pipeline segment (114) via a forward conductor (128) and flows back to the AC power source and/or AC voltage source (126) via a return conductor (130).

    Method and system for extracting pure helium

    公开(公告)号:US11607641B2

    公开(公告)日:2023-03-21

    申请号:US16962418

    申请日:2019-01-10

    申请人: Linde GmbH

    IPC分类号: B01D53/047 B01D53/22

    摘要: The invention relates to a method (200-400) for extracting pure helium using a first membrane separation stage (1), a second membrane separation stage (2), and a third membrane separation stage (3), in which a first helium-containing feed mixture is supplied to the first membrane separation stage (1), a second helium-containing feed mixture is supplied to the second membrane separation stage (2), and a third helium-containing feed mixture is supplied to the third membrane separation stage (3), and in which a first permeate and a first retentate are formed in the first membrane separation stage (1), a second permeate and a second retentate are formed in the second membrane separation stage (2), and a third permeate and a third retentate are formed in the third membrane separation stage (3). According to the invention, the first feed mixture is formed using at least one portion of a helium-containing starting mixture, the second feed mixture is formed using at least one portion of the first permeate, the third feed mixture is formed using at least one portion of the second retentate, the second permeate is at least partially processed by pressure-swing adsorption in order to obtain the pure helium and a remaining mixture, and at least one portion of the third permeate and/or at least one portion of the third retentate is guided back into the method (200). The invention also relates to a corresponding system.