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Patent Agency Ranking
公开(公告)号：US12050056B2
公开(公告)日：2024-07-30
申请号：US18066369
申请日：2022-12-15
Inventor： Yijun Liu , Fritz Pierre, Jr.
CPC classification number: F25J1/0025 , F25J1/0022 , F25J1/005 , F25J1/0072 , F25J1/0222 , F25J1/0249 , F25J1/0254 , F25J2220/64 , F25J2270/902
Abstract: A method for liquefying a feed gas stream. A refrigerant stream is cooled and expanded to produce an expanded, cooled refrigerant stream. Part or all of the expanded, cooled refrigerant stream is mixed with a make-up refrigerant stream in a separator, thereby condensing heavy hydrocarbon components from the make-up refrigerant stream and forming a gaseous expanded, cooled refrigerant stream. The gaseous expanded, cooled refrigerant stream passes through a heat exchanger zone to form a warm refrigerant stream. The feed gas stream is passed through the heat exchanger zone to cool at least part of the feed gas stream by indirect heat exchange with the expanded, cooled refrigerant stream, thereby forming a liquefied gas stream. The warm refrigerant stream is compressed to produce the compressed refrigerant stream.
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公开(公告)号：US12050054B2
公开(公告)日：2024-07-30
申请号：US16851632
申请日：2020-04-17
Inventor： Yijun Liu , Ananda Krishna Nagavarapu
CPC classification number: F25J1/0022 , F25J1/0037 , F25J1/0042 , F25J1/0207 , F25J1/0269 , F25J2200/38 , F25J2260/02 , F25J2260/42
Abstract: A method and apparatus for producing liquefied natural gas (LNG) from a natural gas stream. Heavy hydrocarbons are removed from the natural gas stream in a separator to generate a bottom stream and a separated natural gas stream, which is used as a coolant in a heat exchanger to generate a pretreated natural gas stream. The pretreated natural gas stream is compressed and cooled to form a chilled pretreated natural gas stream, part of which forms a recycle stream to exchange heat with the separated natural gas stream in the heat exchanger, thereby generating a cooled recycle stream. The temperature and pressure of the cooled recycle stream are reduced. The cooled recycle stream is then separated into an overhead stream and a reflux stream, which is directed to the separator. The chilled pretreated gas stream is liquefied to form LNG.
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公开(公告)号：US11815308B2
公开(公告)日：2023-11-14
申请号：US16851763
申请日：2020-04-17
Inventor： Yijun Liu , Fritz Pierre, Jr.
CPC classification number: F25J1/0022 , F25J1/0035 , F25J1/0072 , F25J1/0215 , F25J1/0237 , F25J1/0241 , F25J2205/30 , F25J2210/06 , F25J2210/62 , F25J2220/64 , F25J2230/20 , F25J2230/30
Abstract: A method and apparatus for producing liquefied natural gas. A portion of a natural gas stream is cooled in a first heat exchanger and re-combined with the natural gas stream, and heavy hydrocarbons are removed therefrom to generate a separated natural gas stream and a separator bottom stream. Liquids are separated from the separator bottom stream to form an overhead stream, which is cooled and separated to form a recycle gas stream. The recycle gas stream is compressed. A first portion of the compressed recycle gas stream is directed through the first heat exchanger and directed to the separator as a column reflux stream. The separated to natural gas stream is used as a coolant in the first heat exchanger to thereby generate a pretreated natural gas stream, which is compressed and liquefied.
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公开(公告)号：US11806639B2
公开(公告)日：2023-11-07
申请号：US16851718
申请日：2020-04-17
Inventor： Yijun Liu , Fritz Pierre, Jr.
CPC classification number: B01D1/2856 , B01D1/2884 , F25J1/004 , F25J1/0055 , F25J1/0212 , F25J1/0231 , F25J1/0267 , F25J1/0279 , F25J2210/06 , F25J2220/62 , F25J2220/64 , F25J2245/02
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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5.发明公开公开(公告)号：US20230258401A1
公开(公告)日：2023-08-17
申请号：US18005478
申请日：2021-05-20
Inventor： Jorge Vincentelli , Yijun Liu , Ananda K. Nagavarapu , Xiaoli Y. Wright
CPC classification number: F25J1/0242 , F01K15/00 , F25J1/0022
Abstract: A method of producing LNG. According to the method, a natural gas stream is compressed using first and second compressors. A cooler cools the natural gas stream so that the second compressor produces a cooled, compressed natural gas stream, which is liquefied in a liquefaction process. The liquefaction process uses a refrigerant compressor configured to compress a stream of refrigerant used to chill, condense, or liquefy the cooled, compressed natural gas stream. Using a heat recovery steam generation (HRSG) system, heat is recovered from a power source of the refrigerant compressor. A stream of pressurized steam is generated from the recovered heat. At least one of the first and second compressors is powered using at least part of the stream of pressurized steam.
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