PROCESSES AND SYSTEMS FOR SEPARATING LIQUIFIED NATURAL GAS

    公开(公告)号:WO2022169585A1

    公开(公告)日:2022-08-11

    申请号:PCT/US2022/012699

    申请日:2022-01-18

    Abstract: Disclosed are simplified and energy-efficient distillation processes and systems for separating a liquefied natural gas stream to obtain a natural gas stream and a national gas liquid stream. Substantial savings in construction costs and operation energy consumption can be achieved by using the processes and systems of this disclosure. Preferably the separation processes are integrated with other industrial processes such as petroleum refining, petrochemical production, chemical production, and the like.

    HYDROCARBON GAS PROCESSING
    3.
    发明申请

    公开(公告)号:WO2022109624A1

    公开(公告)日:2022-05-27

    申请号:PCT/US2021/072571

    申请日:2021-11-23

    Applicant: UOP LLC

    Abstract: A process is provided for treating a hydrocarbon gas stream by condensing a portion of the gas stream to produce a liquid stream, then through several steps subcooling a portion of the liquid stream to be introduced into a midpoint into a fractionation column. Unexpectedly, it has been found that the recompression and refrigeration power requirements are substantially reduced and the minimum approach to carbon dioxide freezing are increased w-hen the liquid stream is introduced to a midpoint in the column when compared to introducing the liquid stream to a top position or a lower position in the fractionation column.

    INSTALLATION ET PROCEDE DE PRODUCTION DE BIOMETHANE AVEC PERTE DE METHANE LIMITEE ET EMISSION DE CO2 LIMITEE

    公开(公告)号:WO2021228616A1

    公开(公告)日:2021-11-18

    申请号:PCT/EP2021/061656

    申请日:2021-05-04

    Abstract: Installation et procédé mettant en oeuvre ladite installation pour le traitement par perméation membranaire d'un flux gazeux d'alimentation comprenant au moins du méthane et du dioxyde de carbone, ladite installation comprenant: - une première unité de séparation par membrane apte à recevoir le flux gazeux d'alimentation et à fournir un premier perméat et un premier rétentat, - une seconde unité de séparation par membrane apte à recevoir le premier rétentat et à fournir un second perméat et un second rétentat, - un compresseur permettant de comprimer le premier perméat à une pression comprise entre 17 bar et 25 bar, - Un moyen permettant de refroidir le premier perméat comprimé à une température inférieure à -40°C, - Une colonne de distillation permettant de séparer le premier perméat refroidi en un flux gazeux et un flux liquide, - Au moins un moyen permettant de recycler le flux gazeux sortant de la colonne de distillation à l'entrée de la première unité de séparation membranaire, - un moyen de mesure de la concentration en méthane et/ou en dioxyde de carbone dans le flux gazeux sortant de la colonne de distillation, - un moyen de comparaison de la concentration en méthane et/ou en dioxyde de carbone mesurée par le moyen de mesure avec une valeur cible, et - un moyen d'ajustement de la pression et/ou de la température du premier perméat en fonction de la comparaison effectuée par le moyen de comparaison.

    PRETREATMENT AND PRE-COOLING OF NATURAL GAS BY HIGH PRESSURE COMPRESSION AND EXPANSION

    公开(公告)号:WO2021055020A1

    公开(公告)日:2021-03-25

    申请号:PCT/US2020/028719

    申请日:2020-04-17

    Abstract: A method and apparatus for producing liquefied natural gas. A portion of a natural gas stream is cooled in a heat exchanger and combined with the natural gas stream. Heavy hydrocarbons are removed from the combined natural gas stream, and the resulting separated natural gas stream is partially condensed in the first heat exchanger, with a liquid stream separated therefrom. The natural gas stream is warmed in the first heat exchanger and then is compressed and cooled. The resultant cooled compressed natural gas stream is expanded, thereby forming a chilled natural gas stream that is separated into a refrigerant stream and a non-refrigerant stream. The refrigerant stream recycled to the heat exchanger to be warmed through heat exchange with one or more process streams associated with pretreating the natural gas stream, thereby generating a warmed refrigerant stream. The warmed refrigerant stream and the non-refrigerant stream are liquefied.

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