[특허]High efficiency nitrogen rejection unit

[미국특허] High efficiency nitrogen rejection unit 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F25J-003/02
출원번호	US-0932867 (1992-08-20)
발명자 / 주소	Butts Rayburn C. (2500 N. Big Spring Ste. 230 Midland TX 79705)
인용정보	피인용 횟수 : 25 인용 특허 : 0

초록 ▼

A process for separating nitrogen and hydrocarbons from a mixture of gases by splitting the mixture into a plurality of separate streams and throttling the flow of each stream to achieve a selected variable flow rate therebetween. The plurality of separate streams are individually cooled by exchanging heat with a plurality of different process streams, then the cooled separate streams are combined, cooled by another process stream, and again cooled by expansion. The cooled combined streams then enter a separation column where nitrogen ascends the column and exits as a process stream while hydrocarbon descends the column to a reboiler thereof and exits as several process streams. The reboiler is used for cooling one of the separate streams. The hydrocarbon from the bottom of the column is expanded and used to cool a reflux condenser located inside the column and thereafter cools another of the streams before it is discharged from the process. The nitrogen process stream is used to cool another of the separated streams, and then is discharged from the process. The flow rates are controlled to maintain the throttling of the split streams and the pressure drop across the expansion valves within an optimum range of predetermined values.

대표청구항 ▼

A system for separating nitrogen and hydrocarbon from a mixture thereof, comprising: means for elevating the pressure of said mixture to provide a feed gas; first, second, and third heat exchangers having a primary side thereof arranged in parallel; feed valve means connecting said feed gas to the primary side of said first, second, and third heat exchangers to split the feed gas into three streams and to throttle the flow of said three streams and thereby achieve a selected flow rate therebetween; a separator column including a reboiler; a recombined exchanger means having a primary side connected in series with the primary side of said first, second, and third heat exchangers to recombine the three streams and remove heat from the recombined three streams; said recombined exchanger means having a secondary side connected to receive heat from the lower end of the separator column; a first expansion valve means connecting the primary of said recombined exchanger means to said separator column and reducing the temperature of the fluid flowing therethrough while reducing the pressure to that of the column; a column bottom heat exchanger having a secondary connected to the secondary of said second heat exchanger, a second expansion valve means, an internal reflux condenser in said column; means connecting the bottom of said separator column to flow through the primary of said column bottom heat exchanger and through the second expansion valve means, and into said internal reflux condenser for cooling said condenser; a high pressure residue stream connecting the column bottom to the secondary of said third heat exchanger and to a high pressure discharge; a low pressure residue stream connecting the secondary of said column bottom heat exchanger to a low pressure discharge; a nitrogen gas outlet; means connecting the top of the separator column to the secondary of said first heat exchanger to thereby cool the fluid flowing through the first heat exchanger, and then to said gas outlet; and means by which the feed valve means, the expansion valves, and the reflux condenser temperature are adjusted within an optimum range for separating the nitrogen from the mixture.

이 특허를 인용한 특허 (25) 인용/피인용 타임라인 분석

McNeil Brian A. (Chessington GBX) Evans Michael H. (Antwerpen BEX), Dual column process to remove nitrogen from natural gas.
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Whitlock Walter H., Method and apparatus for purifying a substance.
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Bauer, Heinz; Schopfer, Georg; Witte, Jurgen, Method for separating off nitrogen from natural gas.
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Stinson, Donald Leo, Natural gas processing system.
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Oakey, John Douglas, Nitrogen rejection method and apparatus.
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Bauer, Heinz; Gwinner, Martin; Garthe, Daniel, Nitrogen removal from natural gas.
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Ha Bao, Process and apparatus for the production of nitrogen by cryogenic distillation.
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Cole Eric T., Process for removing a volatile component from natural gas.
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Cole Eric T. ; Stone Brandon T., Process for separating a multi-component pressurizied feed stream using distillation.
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Butts, Rayburn C., System and method for producing LNG from contaminated gas streams.
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Butts, Rayburn C., System and method for reducing nitrogen content of GSP/expander product streams for pipeline transport.
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Butts, Rayburn C., System and method for removing excess nitrogen from gas subcooled expander operations.
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Butts, Rayburn C., System and method for separating wide variations in methane and nitrogen.
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Stinson, Donald Leo, System for dehydrating and cooling a produced gas to remove natural gas liquids and waste liquids.
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Stinson, Donald Leo, System for separating a waste liquid from a produced gas and injecting the waste liquid into a well.
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Stinson, Donald Leo, System for separating a waste material and hydrocarbon gas from a produced gas and injecting the waste material into a well.
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Stinson, Donald Leo, System for separating a waste material from a produced gas and injecting the waste material into a well.
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Stinson, Donald Leo, System for separating carbon dioxide and hydrocarbon gas from a produced gas combined with nitrogen.
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Stinson, Donald Leo, System for separating carbon dioxide from a produced gas with a methanol removal system.
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Severinsky, Alexander J., Systems, methods, and compositions for production of synthetic hydrocarbon compounds.
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Severinsky, Alexander J., Systems, methods, and compositions for production of synthetic hydrocarbon compounds.
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Severinsky, Alexander J., Systems, methods, and compositions for production of synthetic hydrocarbon compounds.
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Severinsky, Alexander J., Systems, methods, and compositions for production of synthetic hydrocarbon compounds.
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Severinsky, Alexander J., Systems, methods, and compositions for production of synthetic hydrocarbon compounds.
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Gaskin,Thomas K., Use of cryogenic temperatures in processing gases containing light components with physical solvents.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] High efficiency nitrogen rejection unit 원문보기