中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

8 records (took 0.011 seconds)

    CRYOGENIC AIR SEPARATION UNIT WITH ARGON CONDENSER VAPOR RECYCLE
    1.
    发明申请
    CRYOGENIC AIR SEPARATION UNIT WITH ARGON CONDENSER VAPOR RECYCLE 审中-公开

    公开(公告)号：WO2023018429A1

    公开(公告)日：2023-02-16

    申请号：PCT/US2021/054349

    申请日：2021-10-11

    Applicant: PRAXAIR TECHNOLOGY, INC.

    Inventor： XU, Zhengrong ,  PROSSER, Neil M.

    IPC: F25J3/04

    Abstract: A system and method for improving the performance of an oxygen, nitrogen, and argon producing air separation unit configured to produce a gaseous nitrogen product stream is provided. By recycling the argon condenser boil-off vapor stream to the main air compression train, the argon recovery and oxygen recovery while maintaining the production level of a medium or high pressure gaseous nitrogen product stream. In addition, some operational cost savings in terms of lower power costs can also be realized compared to some prior art oxygen, nitrogen, and argon producing air separation units.

    CRYOGENIC AIR SEPARATION UNIT WITH ARGON CONDENSER VAPOR RECYCLE
    3.
    发明申请
    CRYOGENIC AIR SEPARATION UNIT WITH ARGON CONDENSER VAPOR RECYCLE 审中-公开

    公开(公告)号：WO2023018430A1

    公开(公告)日：2023-02-16

    申请号：PCT/US2021/054355

    申请日：2021-10-11

    Applicant: PRAXAIR TECHNOLOGY, INC.

    Inventor： XU, Zhengrong

    IPC: F25J3/04

    Abstract: A system and method for producing two or more nitrogen product streams and a crude argon stream from a nitrogen and argon producing air separation unit is provided. The disclosed embodiments of the cryogenic-based nitrogen and argon producing air separation units and associated air separation cycles include the means for directing a first portion of a boil-off stream from an argon condenser of the air separation unit to a waste expansion refrigeration circuit and concurrently recycling a second portion of the boil-off stream from the argon condenser to the main air compression system of the air separation unit to be mixed or blended with the incoming feed air. Optionally, a third portion of the boil-off stream from the argon condenser may be further compressed in a cold compressor and returned to the lower pressure column.

    ENHANCEMENTS TO A DUAL COLUMN NITROGEN PRODUCING CRYOGENIC AIR SEPARATION UNIT
    4.
    发明申请
    ENHANCEMENTS TO A DUAL COLUMN NITROGEN PRODUCING CRYOGENIC AIR SEPARATION UNIT 审中-公开

    公开(公告)号：WO2021242307A1

    公开(公告)日：2021-12-02

    申请号：PCT/US2020/064407

    申请日：2020-12-11

    Applicant: PRAXAIR TECHNOLOGY, INC.

    Inventor： XU, Zhengrong

    IPC: F25J3/04

    Abstract: Enhancements to a dual column, nitrogen producing cryogenic air separation unit with waste expansion are provided. Such enhancements include an improved air separation unit arrangement that uses: (i) three condenser-reboilers; (ii) a reverse reflux stream from the condenser-reboiler associated with the lower pressure column to the higher pressure column; (iii) a waste expansion cycle, and (iv) a recycle stream of a portion of the boil off vapor from one or more of the condenser-reboilers. The improved air separation cycle minimizes the backpressure of the lower pressure column and yields improvements in the nitrogen recovery as well as reductions in unit power consumption compared to conventional dual column, nitrogen producing cryogenic air separation units employing waste expansion.

    CRYOGENIC AIR SEPARATION UNIT WITH FLEXIBLE LIQUID PRODUCT MAKE
    5.
    发明申请
    CRYOGENIC AIR SEPARATION UNIT WITH FLEXIBLE LIQUID PRODUCT MAKE 审中-公开

    公开(公告)号：WO2020050885A1

    公开(公告)日：2020-03-12

    申请号：PCT/US2019/032596

    申请日：2019-05-16

    Applicant: PRAXAIR TECHNOLOGY, INC.

    Inventor： XU, Zhengrong ,  SHELAT, Maulik R. ,  DEGENSTEIN, Nick J. ,  TUO, Hanfei

    IPC: F25J3/04

    Abstract: A cryogenic air separation unit that provides flexibility in the production of liquid products is disclosed. The present cryogenic air separation unit and associated operating methods involves the use of a dual nozzle arrangement for the main heat exchanger that allows a turbine air stream draw from the main heat exchanger at different temperatures to provide refrigeration to the cryogenic air separation unit which, in turn, enables different production modes for the various liquid products.

    ENHANCEMENTS TO A DUAL COLUMN NITROGEN PRODUCING CRYOGENIC AIR SEPARATION UNIT
    6.
    发明申请
    ENHANCEMENTS TO A DUAL COLUMN NITROGEN PRODUCING CRYOGENIC AIR SEPARATION UNIT 审中-公开

    公开(公告)号：WO2021242309A1

    公开(公告)日：2021-12-02

    申请号：PCT/US2020/064756

    申请日：2020-12-14

    Applicant: PRAXAIR TECHNOLOGY, INC.

    Inventor： XU, Zhengrong ,  PROSSER, Neil, M. ,  HANDLEY, James, R. ,  BILLINGHAM, John, F.

    IPC: F25J3/04

    Abstract: Enhancements to a dual column, nitrogen producing cryogenic air separation unit with waste expansion are provided. Such enhancements include an improved air separation cycle that uses: (i) three condenser-reboilers; (ii) a reverse reflux stream from the condenser-reboiler associated with the lower pressure column to the higher pressure column; and (iii) a recycle stream of a portion of the vapor from one or more of the condenser-reboilers that is recycled back to the incoming feed stream and or the compressed purified air streams to yield improvements in the performance of such dual column, nitrogen producing cryogenic air separation units in terms of overall nitrogen recovery as well as power consumption compared to conventional dual column, nitrogen producing cryogenic air separation units employing waste expansion.

    ENHANCEMENTS TO A DUAL COLUMN NITROGEN PRODUCING CRYOGENIC AIR SEPARATION UNIT
    7.
    发明申请
    ENHANCEMENTS TO A DUAL COLUMN NITROGEN PRODUCING CRYOGENIC AIR SEPARATION UNIT 审中-公开

    公开(公告)号：WO2021242308A1

    公开(公告)日：2021-12-02

    申请号：PCT/US2020/064754

    申请日：2020-12-14

    Applicant: PRAXAIR TECHNOLOGY, INC.

    Inventor： XU, Zhengrong ,  PROSSER, Neil, M.

    IPC: F25J3/04

    Abstract: Enhancements to a dual column, nitrogen producing cryogenic air separation unit are provided. Such enhancements include an improved air separation cycle that uses three condenser-reboilers and recycles a portion of the vapor from one or more of the condenser-reboilers to the incoming feed stream and or the compressed purified air streams to yield improvements in the performance of such dual column, nitrogen producing cryogenic air separation units in terms of overall nitrogen recovery as well as power consumption.

Patent Agency Ranking