METHOD AND SYSTEM FOR LIQUEFACTION OF NATURAL GAS USING LIQUID NITROGEN
A method for producing liquefied natural gas (LNG) from a natural gas stream having a nitrogen concentration of greater than 1 mol%. At least one liquid nitrogen (LIN) stream is received at an LNG liquefaction facility. The LIN streams may be produced at a different geographic location from the LNG...
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Format | Patent |
Language | English French |
Published |
29.11.2022
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Abstract | A method for producing liquefied natural gas (LNG) from a natural gas stream having a nitrogen concentration of greater than 1 mol%. At least one liquid nitrogen (LIN) stream is received at an LNG liquefaction facility. The LIN streams may be produced at a different geographic location from the LNG liquefaction facility. A natural gas stream is liquefied by indirect heat exchange with a nitrogen vent stream to form a pressurized LNG stream. The pressurized LNG stream has a nitrogen concentration of greater than 1 mol%. The pressurized LNG stream is directed to one or more stages of a column to produce an LNG stream and the nitrogen vent stream. The column has upper stages and lower stages. The LIN streams are directed to one or more upper stages of the column.
L'invention concerne un procédé de production de gaz naturel liquéfié (GNL) à partir d'un flux de gaz naturel ayant une concentration en azote supérieure à 1 % en moles. Au moins un flux d'azote liquide (AL) est reçu au niveau d'une installation de liquéfaction de GNL. Les flux de AL peuvent être produits à un emplacement géographique différent de l'installation de liquéfaction de GNL. Un flux de gaz naturel est liquéfié par échange de chaleur indirect avec un flux de décharge d'azote pour former un flux de GNL sous pression. Le flux de GNL sous pression présente une concentration en azote supérieure à 1 % en moles. Le flux de GNL sous pression est dirigé vers un ou plusieurs étages d'une colonne pour produire un flux de GNL et le flux d'évent d'azote. La colonne présente des étages supérieurs et des étages inférieurs. Les flux de AL sont dirigés vers un ou plusieurs étages supérieurs de la colonne. |
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AbstractList | A method for producing liquefied natural gas (LNG) from a natural gas stream having a nitrogen concentration of greater than 1 mol%. At least one liquid nitrogen (LIN) stream is received at an LNG liquefaction facility. The LIN streams may be produced at a different geographic location from the LNG liquefaction facility. A natural gas stream is liquefied by indirect heat exchange with a nitrogen vent stream to form a pressurized LNG stream. The pressurized LNG stream has a nitrogen concentration of greater than 1 mol%. The pressurized LNG stream is directed to one or more stages of a column to produce an LNG stream and the nitrogen vent stream. The column has upper stages and lower stages. The LIN streams are directed to one or more upper stages of the column.
L'invention concerne un procédé de production de gaz naturel liquéfié (GNL) à partir d'un flux de gaz naturel ayant une concentration en azote supérieure à 1 % en moles. Au moins un flux d'azote liquide (AL) est reçu au niveau d'une installation de liquéfaction de GNL. Les flux de AL peuvent être produits à un emplacement géographique différent de l'installation de liquéfaction de GNL. Un flux de gaz naturel est liquéfié par échange de chaleur indirect avec un flux de décharge d'azote pour former un flux de GNL sous pression. Le flux de GNL sous pression présente une concentration en azote supérieure à 1 % en moles. Le flux de GNL sous pression est dirigé vers un ou plusieurs étages d'une colonne pour produire un flux de GNL et le flux d'évent d'azote. La colonne présente des étages supérieurs et des étages inférieurs. Les flux de AL sont dirigés vers un ou plusieurs étages supérieurs de la colonne. |
Author | PIERRE, FRITZ |
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DocumentTitleAlternate | PROCEDE ET SYSTEME DE LIQUEFACTION DE GAZ NATUREL PAR UTILISATION D'AZOTE LIQUIDE |
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Snippet | A method for producing liquefied natural gas (LNG) from a natural gas stream having a nitrogen concentration of greater than 1 mol%. At least one liquid... |
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SubjectTerms | BLASTING COMBINED HEATING AND REFRIGERATION SYSTEMS HEAT PUMP SYSTEMS HEATING LIGHTING LIQUEFACTION SOLIDIFICATION OF GASES LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS MANUFACTURE OR STORAGE OF ICE MECHANICAL ENGINEERING MIXTURES BY PRESSURE AND COLD TREATMENT REFRIGERATION OR COOLING WEAPONS |
Title | METHOD AND SYSTEM FOR LIQUEFACTION OF NATURAL GAS USING LIQUID NITROGEN |
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