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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 3047. Отображено 100.
02-02-2012 дата публикации

Multistage cyclonic fluid separator

Номер: US20120024690A1
Автор: Cornelis Antonie Tjeenk Willink, Marco Betting, Robert Petrus Van Bakel
Принадлежит: Twister BV

The invention relates to a cyclonic fluid separator comprising a throat portion ( 4 ) which is arranged between a converging fluid inlet section and a diverging fluid outlet section. The cyclonic fluid separator is arranged to facilitate a cyclonic flow through the converging fluid inlet section and the throat portion towards the diverging fluid outlet section in a downstream direction. The diverging fluid outlet section comprises an inner primary outlet conduit ( 7 ) for condensable depleted fluid components and an outer secondary outlet conduit ( 6 ) for condensable enriched fluid components. The cyclonic fluid separator comprises a further outer secondary outlet conduit ( 16 ). The outer secondary outlet conduit ( 6 ) is positioned on a first position along a central axis (I) of the cyclonic fluid separator and the further outer secondary outlet conduit ( 16 ) is positioned on a second position along the central axis (I) of the cyclonic fluid separator.

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Номер записи: 1
23-02-2012 дата публикации

Lng facility with integrated ngl recovery for enhanced liquid recovery and product flexibility

Номер: US20120042690A1
Автор: Doug Elliot, Jame Yao, Jong Juh Chen, Rong-Jwyn Lee, Shawn S. Huang, Weldon L. Ransbarger, Wesley Qualls
Принадлежит: ConocoPhillips Co

Process for efficiently operating a natural gas liquefaction system with integrated heavies removal/natural gas liquids recovery to produce liquefied natural gas (LNG) and/or natural gas liquids (NGL) products with varying characteristics, such as, for example higher heating value (HHV) and/or propane content. Resulting LNG and/or NGL products are capable of meeting the significantly different specifications of two or more markets.

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Номер записи: 2
15-03-2012 дата публикации

Method for separating off nitrogen and hydrogen from natural gas

Номер: US20120060554A1
Автор: Hans Schmidt
Принадлежит: Linde GmbH

The invention relates to a method for separating off nitrogen and lighter components, in particular hydrogen, carbon monoxide, neon and argon, from a feed fraction (e.g., natural gas) that is to be liquefied containing at least methane, nitrogen and hydrogen. The cooling and liquefaction of the feed fraction proceeds against the refrigerant or mixed refrigerant of at least one refrigeration cycle. In the inventive method, the feed fraction ( 1 ) is partially condensed (E 1 ), and separated in at least one rectification column (T) into a methane-rich fraction ( 6 ) and a fraction ( 4 ) containing nitrogen and lighter components. The methane-rich fraction ( 6 ) is subcooled. Additionally, cooling of the top condenser (E 2 ) of the rectification column (T) proceeds via a refrigerant or mixed refrigerant or a substream of the refrigerant or mixed refrigerant of at least one, refrigeration cycle ( 20 - 24 ).

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Номер записи: 3
05-04-2012 дата публикации

Removal of hydrogen

Номер: US20120079849A1
Автор: Hans Schmidt
Принадлежит: Linde GmbH

The invention relates to a method for liquefying a hydrocarbon-rich fraction ( 1, 1′ ) which contains substantially methane, hydrogen and nitrogen. In the inventive method, before the liquefaction (V) of the hydrocarbon-rich fraction ( 1, 1′ ), the hydrogen ( 2 ) is removed (M) by permeation. This removal (M) of the hydrogen ( 2 ) by permeation is effected in a single-stage or multistage removal process.

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Номер записи: 4
19-04-2012 дата публикации

Configurations and Methods of Heating Value Control in LNG Liquefaction Plant

Номер: US20120090350A1
Автор: John Mak
Принадлежит: Fluor Technologies Corp

NGL recovery from natural gas is achieved by processing the natural gas in a scrub column that operates at high pressure. A C3+ depleted vapor stream is generated from the vapor portion of partially condensed scrub column overhead and expanded to provide refrigeration for the vapor portion to so form a second reflux stream and the C3+ depleted vapor stream. The C3+ depleted vapor stream is then combined with another vapor portion of partially condensed column overhead to produce a lean liquefaction feed stream.

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Номер записи: 5
26-04-2012 дата публикации

Process for separating and recovering NGLs from hydrocarbon streams

Номер: US20120096895A1
Автор: Kirtikumar Natubhai Patel, Rohit N. Patel
Принадлежит: Individual

This process comprises using unconventional processing of hydrocarbons, e.g. natural gas, for recovering C2+ and NGL hydrocarbons that meet pipeline specifications, without the core high capital cost requirement of a demethanizer column, which is central to and required by almost 100% of the world's current NGL recovery technologies. It can operate in Ethane Extraction or Ethane Rejection modes. The process uses only heat exchangers, compression and simple separation vessels to achieve specification ready NGL. The process utilizes cooling the natural gas, expansion cooling, separating the gas and liquid streams, recycling the cooled streams to exchange heat and recycling selective composition bearing streams to achieve selective extraction of hydrocarbons, in this instance being NGLs. The compactness and utility of this process makes it feasible in offshore applications as well as to implementation to retrofit/revamp or unload existing NGL facilities. Many disparate processes and derivatives are anticipated for its use.

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Номер записи: 6
16-08-2012 дата публикации

Cryogenic system for removing acid gases from a hydrocarbon gas stream, with removal of hydrogen sulfide

Номер: US20120204599A1
Автор: Bruce T. Kelley, Charles J. Mart, Paul Scott Northrop
Принадлежит: Individual

A system for removing acid gases from a raw gas stream includes an acid gas removal system (AGRS) and a sulfurous components removal system (SCRS). The acid gas removal system receives a sour gas stream and separates it into an overhead gas stream comprised primarily of methane, and a bottom acid gas stream comprised primarily of carbon dioxide. The sulfurous components removal system is placed either upstream or downstream of the acid gas removal system. The SCRS receives a gas stream and generally separates the gas stream into a first fluid stream comprising hydrogen sulfide, and a second fluid stream comprising carbon dioxide. Where the SCRS is upstream of the AGRS, the second fluid stream also includes primarily methane. Where the SCRS is downstream of the AGRS, the second fluid stream is principally carbon dioxide. Various types of sulfurous components removal systems may be utilized.

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Номер записи: 7
11-10-2012 дата публикации

Single-Unit Gas Separation Process Having Expanded, Post-Separation Vent Stream

Номер: US20120255325A1
Автор: Eric Prim
Принадлежит: Pilot Energy Solutions LLC

A process comprising separating a hydrocarbon feed stream into a natural gas-rich stream and a liquefied petroleum gas (LPG)-rich stream using process equipment comprising only one multi-stage separation column, wherein the natural gas-rich stream has an energy content of less than or equal to about 1,300 British thermal units per cubic foot (Btu/ft 3 ), and wherein the LPG-rich stream has a vapor pressure less than or equal to about 350 pounds per square inch gauge (psig). A process comprising separating a hydrocarbon feed stream into a top effluent stream and a LPG-rich stream, and subsequently expanding the top effluent stream to produce a natural gas-rich stream. An apparatus comprising a multi-stage separation column configured to separate a hydrocarbon feed stream into a top effluent stream and a LPG-rich stream, and an expander configured to expand the top effluent stream and produce a natural gas-rich stream.

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Номер записи: 8
25-04-2013 дата публикации

APPARATUS AND PROCESS FOR SEPARATING AIR BY CRYOGENIC DISTILLATION

Номер: US20130098106A1
Автор: Davidian Benoit
Принадлежит:

In a process for separating air by cryogenic distillation, an oxygen-rich stream having a first oxygen purity of less than 98 mol % oxygen is withdrawn from the column system and sent to a customer, an oxygen-rich liquid stream having a second oxygen purity, possibly lower than 98 mol % oxygen, is sent to a storage tank, liquid is periodically withdrawn from the storage tank and sent to a back-up reboiler, to produce a back-up product, and a liquid stream having a third oxygen purity, lower than the first purity, is withdrawn from the bottom of at least one column of the column system and/or from the auxiliary reboiler and sent to the storage tank as a purge stream during a stoppage in the operation of the column system. 115-. (canceled)16. A process for separating air by cryogenic distillation , the process comprising the steps of:i) cooling compressed and purified air to be separated in a heat exchanger to form cooled air;ii) introducing the cooled air from the heat exchanger to a column system;iii) sending a first oxygen-rich stream having a first oxygen purity of less than 98 mol % of oxygen from the column system and to a customer;iv) sending a second oxygen-rich liquid stream having a second oxygen purity to a storage facility from an external source and/or the column system;v) sending liquid sporadically from the storage facility to a standby evaporator, to produce a standby product in the event of at least one of the group of shutdown of the column system or of increased oxygen demands from a customer; andvi) sending a third oxygen-rich liquid stream having a third oxygen purity from a source to the storage facility as a purge stream, wherein the source is selected from the group consisting of a bottom portion of at least one column of the column system, an auxiliary evaporator, and combinations thereof,wherein the third oxygen-rich liquid stream is sent to the storage facility during a stoppage of the column system, and wherein the third oxygen purity is ...

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Номер записи: 9
30-05-2013 дата публикации

Apparatus and process for separating air by cryogenic distillation

Номер: US20130133364A1
Автор: Benoit Davidian
Принадлежит: LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude

In a process for delivering pressurized gas from an apparatus for separating air by cryogenic distillation, a stream of oxygen-rich liquid or gas having a nominal flow rate is withdrawn from a low-pressure column, an oxygen-rich liquid purge stream is withdrawn as bottoms from the low-pressure column and the oxygen-rich liquid purge stream is sent to a storage tank, in the event of a reduction in the production by the column system or an increase in the demand by a customer, a back-up stream is withdrawn from the storage tank and vaporized in a back-up reboiler and only if the liquid level in the storage tank exceeds a given threshold, a liquid stream is withdrawn from the storage tank constituting at most 2% of the nominal production output of the oxygen-rich stream and is sent to the back-up reboiler.

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Номер записи: 10
20-06-2013 дата публикации

Method To Produce Liquefied Natural Gas (LNG) At Midstream Natural Gas Liquids (NGLs) Recovery Plants

Номер: US20130152627A1
Автор: Jose Lourenco, Mackenzie Millar
Принадлежит: Jose Lourenco, Mackenzie Millar

A method to recover natural gas liquids (NGLs) from natural gas streams at NGL recovery plants. The present disclosure relates to methods using liquid natural gas (LNG) as an external source of stored cold energy to reduce the energy and improve the operation of NGL distillation columns. More particularly, the present disclosure provides methods to efficiently and economically achieve higher recoveries of natural gas liquids at NGL recovery plants.

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Номер записи: 11
20-06-2013 дата публикации

METHOD AND PLANT FOR THE PURIFICATION OF CARBON DIOXIDE USING LIQUID CARBON DIOXIDE

Номер: US20130152628A1
Автор: Find Rasmus
Принадлежит: UNION ENGINEERING A/S

The present invention relates to an improved method for removing contaminants from a gaseous stream substantially comprising carbon dioxide. More specifically, the method comprises the step of subjecting the gaseous stream to an absorption step in which the absorbent is liquid carbon dioxide wherein the waste of carbon dioxide is minimized by utilizing a compressing means for generating a pressure difference between two streams in a reboiler. 125-. (canceled)26. A method for removing at least one contaminant from a feed stream (f) substantially comprising carbon dioxide , said method comprising the step of subjecting the feed stream (f) to{'b': 2', '2', '2', '3, 'a) a purification step in a column having a top, bottom and an intermediate section, the purification step provides a contaminant lean stream (g) leaving the top section of the column and a contaminant rich liquid stream (l) leaving, optionally the bottom section of, the column, said contaminant rich liquid stream (l) being fed to the reboiler (A) and wherein the contaminant lean stream leaving the top section of the column is further subjected to the steps selected from the two options1:{'b': 2', '4, 'b1) compressing the contaminant lean stream (g) providing a compressed gaseous stream (g)'}{'b': 4', '3', '3, 'c1) cooling the compressed gaseous stream (g) in the reboiler (A) providing at least a product stream (p) and a gaseous stream (g); and'}{'b': '3', 'd1) feeding the gaseous stream (g) to the column at the bottom section of the column; and'}2:{'b': 2', '3, 'b2) cooling the contaminant lean stream (g) in a reboiler providing at least a product stream (p) and a gaseous stream (g); and'}{'b': 3', '4, 'c2) compressing the gaseous stream (g) providing a cooled compressed gaseous stream (g′);'}{'b': 4', '2, 'd2) feeding the cooled compressed gaseous stream (g′) to the column at the bottom section of the column; and depressurising the contaminant rich liquid stream (l) leaving at the bottom section of the ...

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Номер записи: 12
11-07-2013 дата публикации

PROCESSES AND SYSTEMS FOR PURIFYING SILANE

Номер: US20130174605A1
Автор: Gu Zhihui, Zou Baisheng
Принадлежит: MEMC ELECTRONIC MATERIALS, INC.

Processes and systems for purifying silane-containing streams and, in particular, for purifying silane-containing streams that also contain ethylene are disclosed. The processes and systems may be arranged such that one or more ethylene reactors are downstream of light-end distillation operations. 1. A process for purifying a silane-containing stream , the stream comprising silane , ethylene and one or more compounds having a boiling point less than silane , the process comprising:introducing the silane-containing stream into a reactor to convert ethylene to at least one of ethylsilane and ethane and to produce an ethylene-depleted stream relative to the silane-containing stream; andintroducing the ethylene-depleted stream into a light-ends distillation column to produce a silane-depleted overhead fraction and a silane-enriched bottoms fraction relative to the ethylene-depleted stream, the silane-enriched bottoms fraction comprising silane and at least one of ethylsilane and ethane.2. The process as set forth in wherein the silane-enriched bottoms fraction produced from the light-ends distillation column is introduced into a heavy-ends distillation column to produce a silane-enriched overhead fraction and a silane-depleted bottoms fraction relative to the silane-enriched bottoms fraction produced from the light-ends distillation column claim 1 , the silane-depleted bottoms fraction being enriched in at least one of ethylsilane and ethane.3. The process as set forth in wherein the silane-containing stream comprises compounds having a boiling point greater than silane other than ethylsilane and ethane claim 2 , wherein the silane-depleted bottoms fraction produced from the heavy-ends distillation column is enriched in such compounds.4. The process as set forth in wherein the one or more compounds having a boiling point greater than silane are selected from the group consisting of diethyl silane claim 3 , toluene claim 3 , dimethoxyethane and mixtures thereof.5. The ...

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Номер записи: 13
22-08-2013 дата публикации

Methods and apparatuses for processing natural gas

Номер: US20130213086A1
Автор: Gregory F. Maher
Принадлежит: UOP LLC

Methods and apparatuses for processing natural gas are provided. In a method for processing a natural gas stream, the natural gas stream is fractionated to form an overhead stream and a bottoms stream. The overhead stream is separated with a membrane to form a methane rich residual stream and a permeate stream.

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Номер записи: 14
03-10-2013 дата публикации

SIMPLIFIED METHOD FOR PRODUCING A METHANE-RICH STREAM AND A C2+ HYDROCARBON-RICH FRACTION FROM A FEED NATURAL-GAS STREAM, AND ASSOCIATED FACILITY

Номер: US20130255311A1
Автор: BARTHE Loïc Pierre Roger, Gahier Vanessa Marie Stéphanie, GOURIOU Julie Anne, Thiebault Sandra Armelle Karen
Принадлежит:

A method comprising the cooling of the feed natural-gas () in a first heat exchanger () and the introduction of the cooled feed natural-gas () in separator flask (). The method further comprising dynamic expansion of a turbine input flow () in a first expansion turbine () and the introduction of the expanded flow () into a splitter column (). This method includes sampling at the head of the splitter column () a methane-rich head stream () and sampling in the compressed methane-rich head stream () a first recirculation stream (). The method comprises the formation of at least one second recirculation stream () obtained from the methane-rich head stream () downstream from the splitter column () and the formation of a dynamic expansion stream () from the second recirculation stream (). 1. A method for producing a methane-rich stream and a C hydrocarbon-rich fraction from a dehydrated feed natural-gas stream , consisting of hydrocarbons , nitrogen and of CO , advantageously having a C hydrocarbon molar content of more than 10% , the method being of the type comprising the following steps:cooling the feed natural-gas stream advantageously at a pressure of more than 40 bars in a first heat exchanger, and introducing the cooled feed natural-gas stream into a separator flask;separating the cooled natural gas stream in the separator flask and recovering an essentially gaseous light fraction and an essentially liquid heavy fraction;forming a turbine input flow from the light fraction;dynamically expanding the turbine input flow in a first expansion turbine, and introducing the expanded flow into an intermediate portion of a splitter column;expanding the heavy fraction and introducing the heavy fraction into the splitter column, the heavy fraction recovered in the separator flask being introduced into the splitter column without passing through the first heat exchanger;{'sub': 2', '2, 'sup': +', '+, 'recovering, at the foot of the splitter column, a C hydrocarbon-rich bottom ...

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Номер записи: 15
14-11-2013 дата публикации

NGL Recovery from a Recycle Stream Having Natural Gas

Номер: US20130298602A1
Автор: Prim Eric
Принадлежит: Pilot Energy Solutions, LLC

A method for recovering natural gas liquids from a recycle stream having natural gas is provided. In one embodiment, a carbon dioxide recycle stream that comprises carbon dioxide, natural gas, and natural gas liquids is received. The carbon dioxide recycle stream is separated into a purified carbon dioxide recycle stream and a natural gas liquids stream. The purified carbon dioxide recycle stream comprises the carbon dioxide and the natural gas, and the natural gas liquids stream comprises the natural gas liquids. In another embodiment, a system comprises piping and a separator. The piping is configured to receive a recycle stream, and the separator is coupled to the piping and is configured to separate the recycle stream into a purified recycle stream and a natural gas liquids stream. 1. A method comprising:receiving a carbon dioxide recycle stream, wherein the carbon dioxide recycle stream comprises carbon dioxide, natural gas, and natural gas liquids; andseparating the carbon dioxide recycle stream into a purified carbon dioxide recycle stream and a natural gas liquids stream, wherein the purified carbon dioxide recycle stream comprises the carbon dioxide and the natural gas, and wherein the natural gas liquids stream comprises the natural gas liquids.2. The method according to claim 1 , wherein the natural gas comprises Cto Chydrocarbons claim 1 , and wherein the natural gas liquids comprise Cto Chydrocarbons.3. The method according to claim 1 , wherein the carbon dioxide recycle stream comprises acid gas claim 1 , and wherein separating the carbon dioxide recycle stream into the purified carbon dioxide recycle stream and the natural gas liquids stream comprises separating the acid gas into the natural gas liquids stream.4. The method according to claim 3 , further comprising separating the natural gas liquids stream into an acid gas stream and a sweet natural gas liquids stream.5. The method according to claim 1 , further comprising separating a feed stream ...

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Номер записи: 16
16-01-2014 дата публикации

Methods for separating hydrocarbon gases

Номер: US20140013796A1
Автор: Ronald D. Key, Zaheer I. Malik
Принадлежит: Linde Process Plants Inc

A process for separating a hydrocarbon gas into a fraction containing a predominant portion of the methane or ethane and lighter components and a fraction containing a predominant portion of the C2 or C3 and heavier components in which the feed gas is treated in one or more heat exchange and expansion steps; partly condensed feed gas is directed into a separator wherein a first residue vapor is separated from a C2 or C3-containing liquid; and C2 or C3-containing liquids at substantially the pressure of separation are directed into a distillation column wherein the liquid is separated into a second residue to recover a C2 or C3-containing product. A portion of the vapor and/or a portion of the liquid from the first hydrocarbon vapor/liquid separation is further cooled and introduced into a fractionation column to increase the C2 or C3 and heavier hydrocarbons recovery from the natural gas stream.

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Номер записи: 17
16-01-2014 дата публикации

System and Method for Removing Excess Nitrogen from Gas Subcooled Expander Operations

Номер: US20140013797A1
Автор: Rayburn C. Butts
Принадлежит: Individual

A system and method for removing nitrogen from an intermediate stream in a gas subcooled process operation that processes natural gas into a sales gas stream and a natural gas liquids stream. The system and method of the invention are particularly suitable for use with gas subcooled process operations where the sales gas stream exceeds pipeline nitrogen specifications by up to about 3%, such as for reducing the nitrogen content of sales gas streams to levels permissible for pipeline transport.

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Номер записи: 18
06-03-2014 дата публикации

METHOD FOR SEPARATING C2+-HYDROCARBONS FROM A HYDROCARBON-RICH FRACTION

Номер: US20140060112A1
Автор: SAPPER Rainer, WITTE Jurgen
Принадлежит:

Described herein is a method for separating C-hydrocarbons from a hydrocarbon-rich fraction comprising partially condensing a hydrocarbon-rich fraction, and separating the hydrocarbon-rich fraction into a gaseous fraction and a liquid fraction. These fractions are subjected to a rectification fractionation to obtain a methane-rich fraction and a C-hydrocarbon-rich fraction. The methane-rich fraction is compressed, and a partial stream of the compressed methane-rich fraction is condensed is fed as reflux to rectification fractionation. In addition, before rectification fractionation, the liquid fraction is separated into two partial streams. The first partial stream is partially evaporated and then is fed to rectification fractionation. The second partial stream is undercooled and then is fed as additional reflux to rectification fractionation. 2. The method according to claim 1 , wherein said hydrocarbon-rich fraction is from natural gas.3211. The method according to claim 1 , wherein said first partial stream (′) is partially evaporated (E) against the hydrocarbon-rich fraction () that is to be partially condensed.42312. The method according to claim 1 , wherein the evaporation pressure of the first partial stream (′ claim 1 , ) is variable (V claim 1 , V).54210. The method according to claim 1 , wherein said second partial stream () is sub-cooled (E) against the methane-rich fraction () obtained from the rectification fractionation (T).6416. The method according to claim 5 , wherein the sub-cooled second partial stream (′) is fed as reflux to the rectification fractionation (T) at a feed point below the feedpoint of the condensed partial stream of the compressed methane-rich fraction used as reflux ().7. The method according to claim 1 , whereinthree heating circuits—via which intermediate fractions are drawn off from the rectification fractionation, partially evaporated and fed again to the rectification fractionation—are assigned to the rectification ...

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Номер записи: 19
06-03-2014 дата публикации

CONFIGURATIONS AND METHODS FOR OFFSHORE NGL RECOVERY

Номер: US20140060114A1
Автор: Mak John
Принадлежит: FLUOR TECHNOLOGIES CORPORATION

A natural gas two-column processing plant allows for recovery of at least 95% of C4 and heavier hydrocarbons, and about 60 to 80% of C3 hydrocarbons from a rich feed gas stream in which the first column (absorber) operates at a higher pressure than the second column, with the absorber receiving a compressed gas from the second column, and a turboexpander discharging a two-phase stream to the top of the absorber. Most typically, contemplated configurations and methods operate without the use of external refrigeration. 1. A method of processing a natural gas stream , comprising:cooling the natural gas stream and separating the cooled natural gas stream into a vapor portion and a liquid portion;using a turboexpander to reduce pressure of the vapor portion to thereby generate a two-phase stream having a liquid phase and a vapor phase;feeding the two phase stream to an absorber such that the liquid phase is a reflux in an absorber that produces an absorber overhead product and an absorber bottom product;reducing the bottom product in pressure and feeding the bottom product after pressure reduction into a fractionator that produces a fractionator bottom product and a fractionator overhead product; andcompressing the fractionator overhead product and using the compressed fractionator overhead product as a stripping gas in the absorber.2. The method of claim 1 , further comprising a step of using refrigeration content of the absorber overhead product for the step of cooling the natural gas stream.3. The method of or claim 1 , further comprising a step of using refrigeration content of the liquid portion and the bottom product after pressure reduction for the step of cooling the natural gas stream.4. The method of further comprising a step of compressing the absorber overhead product claim 1 , and using heat content of the compressed absorber overhead for reboiling the fractionator.5. A natural gas processing plant claim 1 , comprising:a heat exchanger configured to cool a ...

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Номер записи: 20
02-01-2020 дата публикации

Mixing and Heat Integration of Melt Tray Liquids in a Cryogenic Distillation Tower

Номер: US20200003490A1
Автор: Maher David W., Mart Charles J., Smith Ransdall K., Valencia Jaime A.
Принадлежит:

A cryogenic distillation tower for separating a feed stream. The tower includes a distillation section. A controlled freeze zone section is situated above the distillation section and forms a solid from the feed stream. The controlled freeze zone section includes a spray assembly in an upper section and a melt tray assembly in a lower section. The melt tray assembly includes at least one vapor stream riser that directs the vapor from the distillation section into liquid retained by the melt tray assembly, and one or more draw-off openings positioned to permit a portion of the liquid to exit the controlled freeze zone section. The portion of the liquid indirectly exchanges heat with a heating fluid. One or more return inlets return the portion of the liquid to the melt tray assembly after it has been heated in the heat exchanger. 1. A cryogenic distillation tower for separating a feed stream , the distillation tower comprising:a distillation section permitting vapor to rise upwardly therefrom;one or more lines for directing the feed stream into the distillation tower; a spray assembly in an upper section of the controlled freeze zone, and', at least one vapor stream riser that directs the vapor from the distillation section into liquid retained by the melt tray assembly, and', 'one or more draw-off openings positioned to permit a portion of the liquid retained by the melt tray assembly to exit the controlled freeze zone section;, 'a melt tray assembly in a lower section of the controlled freeze zone, wherein the melt tray assembly includes'}], 'a controlled freeze zone section situated above the distillation section, the controlled freeze zone constructed and arranged to form a solid from the feed stream, the controlled freeze zone section including'}a heat exchanger arranged to heat the portion of the liquid through indirect heat exchange with a heating fluid; andone or more return inlets that return the portion of the liquid to the melt tray assembly after the ...

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Номер записи: 21
03-01-2019 дата публикации

SYSTEM AND METHOD FOR RARE GAS RECOVERY

Номер: US20190003766A1
Автор: Howard Henry E.
Принадлежит:

A system and method for argon and nitrogen extraction and liquefaction from a low-pressure tail gas of an ammonia production plant is provided. The preferred tail gas of the ammonia production plant comprises methane, nitrogen, argon, and hydrogen. The disclosed system and method provides for the methane rejection via rectification and hydrogen rejection by way of a side stripper column or phase separator. The resulting nitrogen and argon containing stream is separated and liquefied in a double column distillation system. 1. A method for recovering a rare gas from a pre-purified feed gas comprising hydrogen , nitrogen , methane , argon , and one or more rare gases , the method comprising the steps of:directing the pre-purified feed gas to a rectification column;separating the pre-purified feed gas in a rectification column to produce a methane-rich liquid column bottoms containing the one or more rare gases and an hydrogen-nitrogen rich gas overhead;conditioning the methane-rich liquid column bottoms containing rare gases to produce a stream having a vapor fraction greater than 90% and at or near saturation;directing the methane rich stream and a rare gas lean stream to an auxiliary wash/rectifying column, wherein the rare gas lean stream is a liquid stream extracted from the rectification column or a liquid nitrogen stream;rectifying the two phase methane rich stream and the rare gas lean stream to produce a liquid bottoms rare gas concentrate and a methane-rich overhead; andseparating one or more rare gases from the liquid bottoms rare gas concentrate to produce a rare gas product stream.2. The method of claim 1 , wherein the feed gas is a tail gas from an ammonia plant.3. The method of wherein the rare gas is krypton or xenon.4. The method of claim 1 , wherein the feed gas contains greater than about 50% nitrogen by mole fraction.5. The method of wherein the feed gas is a high pressure feed gas having a pressure of between about 300 psia to 500 psia.6. The method ...

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Номер записи: 22
13-01-2022 дата публикации

METHOD FOR TREATING A FEED GAS STREAM AND ASSOCIATED INSTALLATION

Номер: US20220010225A1
Автор: Laflotte Benoit, Le Ridant Guillaume
Принадлежит:

The method includes cooling and liquefying a feed gas stream, separating a stream obtained from the feed gas stream, and recovering a treated gas stream and a natural gas liquid stream. The method further includes compressing the treated gas stream in order to form a compressed treated gas stream, and fractionating the natural gas liquid stream into a plurality of hydrocarbon fractions (). The method additionally includes withdrawing from the compressed treated gas stream, of a recycle stream, and reintroducing the recycle stream without cooling into the feed gas stream, into the cooled feed gas stream, or into a stream obtained from the cooled feed gas stream upstream of an expander. 1. A feed gas treating method comprising:supplying a feed gas stream and conveying the feed gas stream into a natural gas liquids extractor; cooling the feed gas stream,', 'expanding in an expander the cooled feed gas stream,', 'separating, in a separation column, at least one stream obtained from the cooled feed gas stream, and', 'recovering after separation, a treated gas stream and a natural gas liquid stream;, 'within the extractor'}compressing the treated gas stream in at least one compressor to form a compressed treated gas stream;fractionating, in a fractionator, the natural gas liquid stream into a plurality of hydrocarbon cuts;withdrawing a recycle stream in the compressed treated gas stream; the feed gas stream upstream of the extraction unit,', 'the cooled feed gas stream, or', 'a stream obtained from the cooled feed gas stream, upstream of the expander., 'reintroducing without cooling the recycle stream into at least one of2. The method according to claim 1 , comprising adjusting a flow rate of the reintroduced recycle stream as a function of the natural gas liquid content in the feed gas stream.3. The method according to claim 1 , wherein the molar flow rate of the reintroduced recycle stream is greater than 10% of the molar flow rate of the feed gas stream prior to the ...

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Номер записи: 23
10-01-2019 дата публикации

MODIFIED GOSWAMI CYCLE BASED CONVERSION OF GAS PROCESSING PLANT WASTE HEAT INTO POWER AND COOLING WITH FLEXIBILITY

Номер: US20190010832A1
Автор: Kamel Akram Hamed Mohamed, Noureldin Mahmoud Bahy Mahmoud
Принадлежит: Saudi Arabian Oil Company

A system includes a waste heat recovery heat exchanger configured to heat a heating fluid stream by exchange with a heat source in a crude oil associated gas processing plant; and a modified Goswami energy conversion system. The modified Goswami energy conversion system includes a first group of heat exchangers configured to heat a first portion of a working fluid by exchange with the heated heating fluid stream; and a second group of heat exchangers configured to heat a second portion of the working fluid. The modified Goswami energy conversion system includes a rectifier configured to receive the heated first and second portions of the working fluid and a third portion of the working fluid and to output an overhead discharge stream and a liquid stream, the third portion of the working fluid being at a lower temperature than the heated first and second portions of the working fluid. The modified Goswami energy conversion system includes a cooling subsystem including one or more cooling elements configured to cool a chilling fluid stream by exchange with the overhead discharge stream; and a turbine configured to generate power from the liquid stream of the working fluid. 1. (canceled)2. A method comprising:heating a first portion of a working fluid using heat recovered from a heat source in a crude oil associated gas processing plant;heating a second portion of the working fluid by exchange with a liquid stream of the working fluid;receiving the heated first and second portions of the working fluid in a rectifier;outputting, from the rectifier, a vapor stream of the working fluid and the liquid stream of the working fluid;cooling a chilling fluid stream in a cooling element by exchange with at least a portion of the vapor stream of the working fluid output from the rectifier; andgenerating power from the liquid stream of the working fluid by a turbine.3. The method of claim 2 , wherein the turbine is a first turbine claim 2 , and wherein the method comprises ...

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Номер записи: 24
10-01-2019 дата публикации

Sales Gas Enrichment with Propane and Butanes By IDS Process

Номер: US20190011180A1
Автор: Mostafa Hussein Mohamed Ismail
Принадлежит:

The present invention is a separation unit process in which a high pressure section of a separation unit operates at a relatively high pressure to initially process and separate a high pressure feed stream and a low pressure section of the separation unit to initially process and separate a low pressure feed stream, where the high pressure section and the low pressure section are integral with and exchange streams to accomplish a desired separation of a wellhead fluid feed which typically includes a heavier portion of pentanes and heavier components 1. A separation unit process for a hydrocarbon fluid feed from a wellhead source comprising:(a) separating the fluid feed in a high pressure drum to form an HP gas and an HP liquid;(b) reducing the pressure of the HP liquid to a low pressure and separating the low pressure HP liquid in a stabilizer column to form a sales oil product as a bottoms liquid product and a stabilizer overhead stream, which has hydrocarbon components that consist essentially of butanes and lighter components;(c) combining a compressed stabilizer overhead stream with the HP gas to be fed to a high pressure column operating at about the pressure of the natural HP gas feed, where a portion of a liquid bottoms stream of the high pressure column consists of a sales condensate stream recovering a portion of all hydrocarbon components of pentanes and heavier components in the fluid feed and a high pressure column overhead stream is compressed in a first compressor, where a portion of the compressed high pressure column overhead is further compressed to form a sale gas stream;(d) the balance of the compressed high pressure column overhead stream being cooled and fed to the bottom stage of an fuel gas absorber column operating at a substantially higher pressure than the high pressure column, where the fuel gas absorber column overhead stream is mixed with the balance of the liquid bottom stream of the high pressure column (pentanes plus), cooled and ...

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Номер записи: 25
17-01-2019 дата публикации

METHOD AND PROCESS FOR CONVERTING THE ETHYLENE PRESENT IN THE OVERHEAD EFFLUENT FROM A FCC IN A MANNER SUCH AS TO INCREASE THE PROPYLENE PRODUCTION

Номер: US20190016648A1
Автор: COUPARD Vincent, Fischer Beatrice
Принадлежит: IFP ENERGIES NOUVELLES

The present invention describes a process for fractionating the gaseous fraction leaving overhead from the fractionation column of a catalytic cracking unit (FCC) using a unit for the conversion of ethylene into propylene, in order to upgrade the ethylene contained in the fuel gas. 1. A device for fractionating the gaseous fraction leaving the head of the fractionation column of a catalytic cracking unit , the fraction containing LPG , light gasoline , and a residual gas termed “fuel gas” which itself contains a certain quantity of ethylene , the device comprising:{'b': 6', '15', '10, 'a first absorption section () which can be used to separate the fuel gas () and the light gasoline and LPG stream (), said section being present in an existing catalytic cracking unit,'}{'b': 22', '15, 'a unit () for the catalytic conversion of ethylene into propylene and other products of interest, wherein the feed is constituted by the fuel gas (), in which a large portion of the ethylene is essentially converted into propylene and also into aromatics and other products of interest, in the presence of a catalyst based on zeolite,'}{'b': 31', '22', '31', '11, 'a novel absorption section () which admits the effluents from the conversion unit () after recompression, the propylene, butene and the gasoline fractions contained in said effluents being recovered in said novel absorption section (), by using the gasoline arriving from the existing debutanizer (),'}{'b': 16', '33', '31, 'a second absorption section (), which admits the gas () obtained from the novel absorption section (),'}{'b': 35', '34', '31', '36', '37, 'a debutanization section () which admits the LPG and gasoline fractions () obtained from the novel absorption section () and which produces a stabilized gasoline () and a light LPG fraction ().'}222223227224223227225227228. The device for fractionating the gaseous fraction leaving the head of the fractionation column of a catalytic cracking unit as claimed in claim 1 , in ...

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Номер записи: 26
17-01-2019 дата публикации

Organic Rankine Cycle Based Conversion of Gas Processing Plant Waste Heat into Power and Cooling

Номер: US20190017418A1
Автор: Kamel Akram Hamed Mohamed, Noureldin Mahmoud Bahy Mahmoud
Принадлежит: Saudi Arabian Oil Company

A system includes a waste heat recovery heat exchanger configured to heat a heating fluid stream by exchange with a heat source in a crude oil associated gas processing plant; and an Organic Rankine cycle energy conversion system. The Organic Rankine cycle energy conversion system includes a heat exchanger configured to heat a first portion of a working fluid by exchange with the heated heating fluid stream; and a cooling subsystem including one or more cooling elements each configured to cool one or more of a process stream from the crude oil associated gas processing plant and a cooling water stream for ambient air cooling by exchange with a second portion of the working fluid. The Organic Rankine cycle energy conversion system includes an ejector configured to receive the second portion of the working fluid from the cooling subsystem and a third portion of the working fluid; a turbine and a generator configured to generate power by expansion of a fourth portion of the working fluid; and a cooling element configured to cool a stream of working fluid including an output stream of working fluid from the ejector and the expanded fourth portion of the working fluid from the turbine and generator. 129-. (canceled)30. A method comprising:heating a heating fluid stream via a waste heat recovery exchanger by exchange with a heat source in a crude oil associated gas processing plant; heating a first portion of a working fluid by exchange with the heated heating fluid stream via an energy conversion heat exchanger, the working fluid comprising iso-butane;', 'cooling one or more of a process stream from the crude oil associated gas processing plant and a cooling water stream for ambient air cooling by exchange with a second portion of the working fluid in a cooling subsystem;', 'in an ejector, combining the second portion of the working fluid from the cooling subsystem and a third portion of the working fluid, the third portion of the working fluid being a portion of the ...

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Номер записи: 27
26-01-2017 дата публикации

CONFIGURATIONS AND METHODS FOR NITROGEN REJECTION, LNG AND NGL PRODUCTION FROM HIGH NITROGEN FEED GASES

Номер: US20170023293A1
Автор: Mak John
Принадлежит:

Variable N2 content in feed gas ranging from 3 mol % to 50 mol % can be rejected from the process using a feed exchanger that is fluidly coupled with a cold separator and a single fractionation column to produce a nitrogen vent stream and streams that are suitable to be further processed for NGL recovery and LNG production. 1. A plant with a nitrogen removal unit and a natural gas liquids recovery unit , comprising:a feed gas source configured to provide a hydrocarbonaceous feed gas having a CO2 content of equal or less than 50 ppmv, a water content of equal or less than 0.1 ppmv, and a nitrogen content of at least 3 mol %;a heat exchanger configured to receive and cool the hydrocarbonaceous feed gas to a temperature that condenses C3+ components in the hydrocarbonaceous feed gas;a phase separator configured to receive the cooled hydrocarbonaceous feed gas and to separate the condensed C3+ components as a liquid stream from a vapor stream comprising C1, C2, and nitrogen;a conduit fluidly coupled to the phase separator and configured to transport the liquid stream to a natural gas liquids recovery unit;a refluxed fractionation column configured to receive the vapor stream and to produce a nitrogen-enriched overhead product and a nitrogen-depleted bottom product;a reflux condenser configured to partially condense the nitrogen-enriched overhead product using refrigeration of a pressure-reduced first portion of the nitrogen-depleted bottom product to thereby produce a liquid reflux to the fractionation column and a gaseous nitrogen vent stream; anda natural gas liquefaction unit fluidly coupled to the refluxed fractionation column and configured to receive the first portion of the nitrogen-depleted bottom product and a second portion of the nitrogen-depleted bottom product.2. The plant of claim 1 , wherein the heat exchanger is further configured to receive and cool the vapor stream to at least partially condense the vapor stream.3. The plant of claim 1 , wherein the ...

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Номер записи: 28
25-01-2018 дата публикации

METHOD FOR RECOVERING HELIUM

Номер: US20180023888A1
Автор: BAUER Heinz, BUB Andreas, Gwinner Martin, HERTEL Christoph
Принадлежит:

A method for recovering a helium product fraction () from a nitrogen- and helium-containing feed fraction () is described, wherein the nitrogen- and helium-containing feed fraction () is partially condensed (E), separated into a first helium-enriched fraction () and a first nitrogen-enriched fraction () and the former is cleaned again in an adsorptive manner. 2. The method according to claim 1 , characterized in that the third nitrogen-enriched fraction is at least partially work-performing expanded.3. The method according to claim 1 , characterized in that the separation column is operated under a pressure of 7 to 20 bar.4. The method according to claim 1 , characterized in that the third nitrogen-enriched fraction contains at least 50% of the nitrogen contained in the first nitrogen-enriched fraction.5. The method according to claim 1 , characterized in that at least a sub-flow of the second nitrogen-enriched fraction is evaporated against the nitrogen- and helium-containing feed fraction to be partially condensed under a pressure of less than 3 bar.6. The method according to claim 1 , characterized in that the adsorptive cleaning process is a (V)PSA and/or TSA process.7. The method according to claim 3 , characterized in that the separation column is operated under a pressure of 10 to 15 bar. The invention relates to a method for recovering a helium product fraction from a nitrogen- and helium-containing feed fraction, whereinThe term “helium product fraction” be comprised of highly purified helium, the concentration and contamination of which do not exceed a value of 100 vppm, preferably of 10 vppm.The term “nitrogen- and helium-containing feed fraction” be understood as a fraction, which contains 1 to 20 mol-% helium and 80 to 99 mol-% nitrogen. Further, this feed fraction can contain 0.1 to 2 mol-% methane and traces of hydrogen, argon and/or other noble gases.Currently, helium is obtained almost exclusively from a mixture of volatile natural gas components, ...

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Номер записи: 29
25-01-2018 дата публикации

Heavy Hydrocarbon Removal System for Lean Natural Gas Liquefaction

Номер: US20180023889A1
Автор: Annemarie Ott Weist, Christopher Michael Ott, Fei Chen, Mark Julian Roberts
Принадлежит: Air Products and Chemicals Inc

A system and method for integrated heavy hydrocarbon removal in a liquefaction system having a lean natural gas source. An economizer located between a main cryogenic heat exchanger and a reflux drum is provided to cool an overhead vapor stream against a partially condensed stream. In addition, pressure of the natural gas feed stream is maintained into a scrub column. A pressure drop is provided by a valve located between the economizer and the reflux drum on a partially condensed stream withdrawn from the cold end of the warm section of the main cryogenic heat exchanger.

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Номер записи: 30
24-01-2019 дата публикации

Process for Removing Light Components from an Ethylene Stream

Номер: US20190024971A1
Автор: ARRATIA Manuela, BOUTROT Catherine, Vermeiren Walter
Принадлежит:

A process for removing light components from an ethylene stream may include providing a dried ethylene stream containing ethylene, ethane, CO, CO, H, CH, and C hydrocarbons. The process may include sending the dried ethylene stream to a stripper to produce an overhead stream containing ethylene, CO, Hand CH, and a bottom stream containing ethylene, ethane, CO, and C hydrocarbons. The gaseous phase on top of the stripper may be condensed in a heat exchanger cooled by a refrigerant stream to get a first gaseous phase and a first liquid phase. The first gaseous phase may be condensed in a heat exchanger cooled by liquid ethane or liquid ethylene to get a second gaseous phase containing ethylene CO, Hand CHand a second liquid phase. The first and second liquid phases may be the reflux of the stripper. 119-. (canceled)20. A process for removing light components from an ethylene stream comprising:{'sub': 2', '2', '4', '3+, 'a) providing a dried ethylene stream (A) comprising ethylene, ethane, CO, CO, H, CH, C hydrocarbons and optionally oxygenates;'} [{'sub': 2', '4, 'an overhead gaseous stream (B) comprising ethylene, CO, Hand CH; and'}, {'sub': 2', '3+, 'a bottom stream (C) comprising ethylene, ethane, CO, C hydrocarbons and optionally oxygenates;'}], 'b) separating from said dried ethylene stream (A) in a separation mean that is a demethanizer or a stripper to formc) cooling the overhead gaseous stream (B) to a temperature ranging from −10° C. to −45° C. to get a first gaseous stream (D) and a first liquid stream (E);{'sub': 2', '4, 'd) cooling the first gaseous stream (D) to a temperature ranging from −10° C. to −45° C. lower than the temperature of step c) to get a second gaseous stream (F) comprising ethylene CO, Hand CHand a second liquid stream (G); and'}e) sending the first and second liquid streams (E) and (G) to the separation mean as a reflux.21. The process according to claim 20 , wherein the cooling of step c) is performed with a refrigerant stream that ...

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Номер записи: 31
02-02-2017 дата публикации

SYSTEM AND METHOD FOR LIQUEFACATION OF NATURAL GAS

Номер: US20170030633A1
Автор: Kikkawa Yoshitsugi, Liu Yu Nan, Sakai Koichiro, Truong Timothy
Принадлежит:

By using the power generated by an expander by an expansion of material gas, the outlet pressure of a compressor is increased, and a requirement on the cooling capacity of a cooler is reduced. The liquefaction system () for natural gas comprises a first expander () for generating power by expanding natural gas under pressure as material gas; a first cooling unit () for cooling the material gas depressurized by expansion in the first expander; a distillation unit () for reducing or eliminating a heavy component in the material gas by distilling the material gas cooled by the first cooling unit; a first compressor () for compressing the material gas from which the heavy component was reduced or eliminated by the distillation unit by using the power generated in the first expander; a second heat exchanger for exchanging heat between the material gas introduced into the first compressor and the material gas compressed by the first compressor; and a liquefaction unit () for liquefying the material gas compressed by the first compressor by exchanging heat with a refrigerant. 1. A method for cooling a natural gas feed comprising:a) reducing the pressure of the natural gas feed to produce a reduced pressure material gas;b) removing heavy components from the reduced pressure material gas to produce a top fraction and a bottom fraction;c) cooling the top fraction to produce a cooled top fraction;d) separating the cooled top fraction into a gas phase component and a liquid phase component;e) increasing the pressure of the gas phase component to produce a compressed material gas; andf) exchanging heat between the gas phase component and the compressed material gas to produce at least a cooled compressed material gas.2. The method of further comprising cooling the reduced pressure material gas of step (a) prior to removing heavy components in step (b).3. The method of further comprising at least partially liquefying the cooled compressed material gas of step (f).4. The method of ...

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Номер записи: 32
01-02-2018 дата публикации

System and Method for Separating Wide Variations in Methane and Nitrogen

Номер: US20180031314A1
Автор: Butts Rayburn C.
Принадлежит:

A system and method for removing nitrogen and producing a high pressure methane product stream from natural gas feed streams having wide variations in nitrogen and methane content are disclosed. Optional add-on systems may be incorporated into the nitrogen and methane separation to produce an NGL sales stream to reduce excess hydrocarbons in the nitrogen vent stream, or to recover helium. The system and method of the invention are particularly suitable for use with feed streams in excess of 50 MMSCFD and up to 300 MMSCFD and containing up to 100 ppm carbon dioxide. Typical power requirements for compressing the methane product stream to produce a suitably high pressure stream for sale are reduced according to the systems and methods of the invention. 1. A system for removing nitrogen and for producing a methane product stream from a first feed stream comprising nitrogen and methane , the system comprising:a first splitter wherein the first feed stream is divided into a second feed stream and a third feed stream;a first fractionating column wherein the second feed stream and the third feed stream are separated into a first overhead stream and a first bottoms stream;a second fractionating column comprising a condenser and a second external reboiler, wherein the first overhead stream is separated into a second overhead stream and a second bottoms stream;a third fractionating column wherein the second overhead stream is separated into a third overhead stream and a third bottoms stream;a first heat exchanger for cooling the first feed stream upstream of the first splitter and for cooling the second feed stream upstream of the first fractionating column through heat exchange with the first bottoms stream and the first overhead stream, whereby the first bottoms stream and first overhead stream are heated in the first heat exchanger;a first external reboiler for cooling the third feed stream upstream of the first fractionating column through heat exchange with the first ...

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Номер записи: 33
05-02-2015 дата публикации

Process for liquefaction of natural gas

Номер: US20150033793A1
Автор: John L. Griffiths
Принадлежит: UOP LLC

A process and system for production of liquefied natural gas (LNG) from natural gas. The natural gas is first partially purified by removal of water and other contaminants, followed by partial chilling to freeze some contaminants and to allow for production of a purge stream to remove other contaminants. These contaminants may be removed from the stream. The process has advantages of low cost and improved removal of contaminants.

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Номер записи: 34
04-02-2021 дата публикации

HELIUM RECOVERY FROM GASEOUS STREAMS

Номер: US20210031139A1
Автор: Abang Taib, Duval Sebastien A., HAMAD Feras, Rithauddeen Megat A., Vaidya Milind
Принадлежит: Saudi Arabian Oil Company

Recovering helium from a gaseous stream includes contacting an acid gas removal membrane with a gaseous stream to yield a permeate stream and a residual stream, removing a majority of the acid gas from the residual stream to yield a first acid gas stream and a helium depleted clean gas stream, removing a majority of the acid gas from the permeate stream to yield a second acid gas stream and a helium rich stream, and removing helium from the helium rich stream to yield a helium product stream and a helium depleted stream. A helium removal system for removing helium from a gaseous stream including hydrocarbon gas, acid gas, and helium includes a first processing zone including a first acid gas removal unit, a second processing zone including a second acid gas removal unit, a third processing zone, and a helium purification unit. 1. A helium recovery method comprising:contacting an acid gas removal membrane with a gaseous stream comprising hydrocarbon gas, acid gas, and helium, thereby separating the gaseous stream into a permeate stream and a residual stream, each comprising a portion of the hydrocarbon gas, a portion of the acid gas, and a portion of the helium, wherein concentration of the helium in the permeate stream is greater than concentration of the helium in the residual stream, and wherein concentration of the acid gas in the permeate stream is greater than concentration of the acid gas in the residual stream;removing a majority of the acid gas from the residual stream to yield a first acid gas stream and a helium depleted clean gas stream, wherein concentration of acid gas in the first acid gas stream is greater than concentration of acid gas in the helium depleted clean gas stream; andremoving a majority of the acid gas from the permeate stream to yield a second acid gas stream and a helium rich stream, wherein concentration of acid gas in the second acid gas stream is greater than concentration of acid gas in the helium rich stream.2. The method of claim ...

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Номер записи: 35
30-01-2020 дата публикации

NATURAL GAS LIQUID FRACTIONATION PLANT WASTE HEAT CONVERSION TO POTABLE WATER USING MODIFIED MULTI-EFFECT DISTILLATION SYSTEM

Номер: US20200032677A1
Автор: Kamel Akram Hamed Mohamed, Noureldin Mahmoud Bahy Mahmoud
Принадлежит: Saudi Arabian Oil Company

A method of recovering heat from a Natural Gas Liquid (NGL) fractionation plant for production of potable water. The method includes heating a buffer fluid via a heat exchanger in to transfer heat from the NGL fractionation plant to the buffer fluid. The method includes heating water with the buffer fluid discharged from the heat exchanger to produce potable water via train distillation effects. 1. A method of recovering heat , via a waste heat recovery heat exchanger network having heat exchangers , from a Natural Gas Liquid (NGL) fractionation plant for producing potable water , the method comprising:heating a buffer fluid via a heat exchanger in the waste heat recovery network with a stream in the NGL fractionation plant, the NGL fractionation plant comprising a dehydrator, a distillation column, and a compressor; andproducing potable water via train distillation effects with heat from the buffer fluid.2. The method of claim 1 , wherein producing potable water with heat from the buffer fluid comprises heating brackish water with heat carried by the buffer fluid claim 1 , wherein a multi-effect-distillation (MED) system comprises the train distillation effects.3. The method of claim 2 , wherein the buffer fluid comprises water or oil claim 2 , and wherein the MED system comprises a modified MED system.4. The method of claim 1 , wherein the distillation column comprises a de-propanizer distillation column the stream comprises an overhead outlet stream from the de-propanizer distillation column claim 1 , or wherein the distillation column comprises a de-butanizer distillation column and the stream comprises an overhead outlet stream from the de-butanizer distillation column.5. The method of claim 1 , wherein the distillation column comprises a de-butanizer distillation column claim 1 , and wherein the stream comprises an overhead outlet stream from the de-butanizer distillation column or a bottoms outlet stream from the de-butanizer distillation column.6. The method ...

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Номер записи: 36
07-02-2019 дата публикации

Recovery Of Helium From Nitrogen-Rich Streams

Номер: US20190041128A1
Автор: Berger Alan, Higginbotham Paul, Palamara John Eugene, White Vincent
Принадлежит: AIR PRODUCTS AND CHEMICALS, INC.

Overall power consumption in a cryogenic distillation process for recovering helium from nitrogen-rich gases comprising helium may be reduced if the feed to the distillation column system is at least substantially condensed by indirect heat exchange against a first bottoms liquid at first pressure, and a second bottoms liquid at a second pressure that is different from the first pressure. 1. Apparatus for recovering helium from a nitrogen-rich feed gas comprising helium , said apparatus comprising:a distillation column system for operation at an elevated operating pressure to separate at least partially condensed feed gas into helium-enriched overhead vapor and nitrogen-enriched bottoms liquid(s);an overhead condenser for partially condensing helium-enriched overhead vapor by indirect heat exchange to produce helium-enriched vapor as product and liquid for reflux in the column system;a first heat exchange system for cooling feed gas by indirect heat exchange with a first nitrogen-enriched bottoms liquid to produce cooled feed gas and vapor for the column system;a first pressure reduction device for reducing the pressure of a second nitrogen-enriched bottoms liquid to produce reduced pressure bottoms liquid;a second heat exchange system for cooling said cooled feed gas by indirect heat exchange against said reduced pressure bottoms liquid to produce at least partially condensed feed gas and vaporized bottoms liquid; anda second pressure reduction device for reducing the pressure of said at least partially condensed feed gas to produce at least partially condensed feed gas at reduced pressure for use as said feed to the distillation column system.2. The apparatus of comprising a third pressure reduction device for reducing the pressure of a third nitrogen-enriched bottoms liquid to produce reduced pressure bottoms liquid for vaporization by indirect heat exchange in said overhead condenser to produce nitrogen-enriched vapor.3. The apparatus of comprising an expander ...

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Номер записи: 37
06-02-2020 дата публикации

Natural Gas Liquid Fractionation Plants Low Grade Waste Heat Conversion to Cooling, Power and Water

Номер: US20200040773A1
Автор: Kamel Akram Hamed Mohamed, Noureldin Mahmoud Bahy Mahmoud
Принадлежит:

A method of recovering heat from a Natural Gas Liquid (NGL) fractionation plant for production of potable water. The method includes heating a buffer fluid via a heat exchanger in the NGL fractionation plant to transfer heat from the NGL fractionation plant to the buffer fluid. The method includes heating feed water with the buffer fluid discharged from the heat exchanger for production of potable water via a multi-effect-distillation (MED) system. The method may include producing potable water with heat from the buffer fluid in the MED system. 1. A method of recovering heat from a Natural Gas Liquid (NGL) fractionation plant for production of potable water , the method comprising:heating a buffer fluid via a heat exchanger in a NGL fractionation plant to transfer heat from the NGL fractionation plant to the buffer fluid, the NGL fractionation plant comprising a dehydrator column and a distillation column; andproducing potable water with heat from the buffer fluid in a multi-effect distillation (MED) system comprising train distillation effects.2. The method of claim 1 , comprising:storing the buffer fluid in a storage tank;flowing the buffer fluid from the storage tank to the heat exchanger; andflowing the buffer fluid from the MED system to the storage tank.3. The method of claim 1 , wherein producing potable water with heat from the buffer fluid comprises heating brackish water with heat from the buffer fluid claim 1 , wherein the MED system is a modified MED system claim 1 , and wherein the buffer fluid comprises water or oil.4. The method of claim 1 , wherein the NGL fractionation plant comprises a natural gas de-colorizing section comprising the distillation column as a natural gas de-colorizer distillation column claim 1 , and wherein heating the buffer fluid comprises heating the buffer fluid via the heat exchanger with heat from a pre-flash drum overhead outlet stream in the natural gas de-colorizing section.5. The method of claim 1 , wherein the NGL ...

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Номер записи: 38
26-02-2015 дата публикации

FRACTIONATION SYSTEM AND METHOD INCLUDING DEPROPANIZER COLUMN AND BOTTOMS STRIPPING COLUMN

Номер: US20150052940A1
Автор: King Stephen T., Lankton Steven, Zhu Xin X.
Принадлежит: UOP LLC

Fractionation systems utilizing a rectifying column with a stripping column are described. The liquid from the rectifying column bottoms is sent to the first tray of the stripping column, while the overhead stream from the stripping column is sent to the bottom of the rectifying column. Processes for separating feed streams are also described. 1. A fractionation system comprising:a rectifying column having a feed inlet between a top and a bottom tray, a reflux inlet at the top tray, a fluid inlet at the bottom tray, an overhead product outlet at the first tray, and a bottoms outlet at the bottom tray;a rectifying column reboiler in communication with the rectifying column;a stripping column having a fluid inlet at a top tray, an overhead outlet at the top tray, and a bottoms outlet at a bottom tray, the bottoms outlet of the rectifying column being in fluid communication with the fluid inlet of the stripping column, the overhead outlet of the stripping column being in fluid communication with the fluid inlet of the rectifying column; anda stripping column reboiler in communication with the stripping column.2. The fractionation system of wherein the rectifying column and the stripping column are in separate vessels.3. The fractionation system of wherein the rectifying column and the stripping column are in a single vessel claim 1 , the rectifying column being positioned above the stripping column claim 1 , the rectifying column having a diameter claim 1 , and the stripping column having a diameter less than the diameter of the rectifying column.4. The fractionation system of wherein the rectifying column is separated from the stripping column by a liquid accumulator tray.5. The fractionation system of further comprising a condenser having an inlet in fluid communication with the product overhead outlet of the rectifying column claim 1 , and an outlet in fluid communication with the reflux inlet of the rectifying column.6. The fractionation system of wherein at least ...

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Номер записи: 39
26-02-2015 дата публикации

FRACTIONATION SYSTEM HAVING RECTIFYING AND STRIPPING COLUMNS IN A SINGLE VESSEL WITH A UNIFORM DIAMETER

Номер: US20150052941A1
Автор: King Stephen T., Kozup Steven, Zhu Xin X.
Принадлежит: UOP LLC

Fractionation systems utilizing a single rectifying column with a stripping column housed in the same vessel and having a uniform diameter are described. Methods of separating feed streams using the fractionation systems are also described. 1. A fractionation system comprising:a rectifying column having a feed inlet between a top and a bottom plate, a reflux inlet at the top plate, a fluid inlet at the bottom plate, an overhead product outlet at the first plate, and a bottoms outlet at the bottom plate;a rectifying column side reboiler in communication with the rectifying column;a stripping column having a fluid inlet at a top plate, an overhead outlet at the top plate, and a bottoms outlet at the bottom plate, the bottoms outlet of the rectifying column being in fluid communication with the fluid inlet of the stripping column, the overhead outlet of the stripping column being in fluid communication with the fluid inlet of the rectifying column;a stripping column reboiler in communication with the stripping column; andthe rectifying column and the stripping column being in a single vessel having a uniform diameter, the rectifying column being positioned above the stripping column.2. The fractionation system of wherein the rectifying column includes a plurality of high performance trays.3. The fractionation system of wherein the stripping column comprises a side-by-side stacked arrangement of fractionation trays claim 1 , wherein the bottom of the first stack is in liquid communication with the top of the second stack and wherein the top of the second stack is in vapor communication with the bottom of the first stack.4. The fractionation system of wherein there is a blind tray at the top of the second stack to prevent direct liquid and vapor communication between the second stack and the rectifying column.5. The fractionation system of wherein the vapor communication is provided by a vapor channel from the top of the second stack to the bottom of the first stack.6. ...

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Номер записи: 40
14-02-2019 дата публикации

METHODS FOR PROVIDING REFRIGERATION IN NATURAL GAS LIQUIDS RECOVERY PLANTS

Номер: US20190049176A1
Автор: MCCOOL Grant L., PUIGBO Arturo, WALTER Thomas
Принадлежит: Linde Engineering North America Inc.

A process and plant for natural gas liquids (NGL) recovery includes a main heat exchanger, a cold gas/liquid separator, a separation or distillation column, and an overhead gas heat exchanger. A pressurized residue gas generated from an overhead gas stream removed the top of the separation or distillation column is expanded and used as a cooling medium in the overhead gas heat exchanger and the main heat exchanger. The expanded residue gas, used as a cooling medium, is then compressed up to a pressure to be combined with the overhead stream from the separation or distillation column. 1. A process for natural gas liquids (NGL) recovery comprising:introducing a natural gas feed stream into a main heat exchanger wherein the feed stream is cooled and partially condensed,introducing the partially condensed feed stream into a cold gas/liquid separator wherein the partially condensed feed stream is separated into a liquid fraction and a gaseous fraction,introducing the liquid fraction into a separation or distillation column,separating the gaseous fraction into a first portion and a second portion,cooling the first portion of the gaseous fraction in an overhead heat exchanger by indirect heat exchange with an overhead gaseous stream removed from the top of the separation or distillation column, and introducing the cooled and partially condensed first portion of the gaseous fraction into the separation or distillation column at a point above the introduction point of the liquid fraction into the separation or distillation column,expanding the second portion of the gaseous fraction and introducing the expanded second portion of the gaseous fraction into the separation or distillation column at a point above the introduction point of the liquid fraction into the separation or distillation column,removing a C2+ or C3+ liquid product stream (NGL) from the bottom of the separation or distillation column,removing the overhead gaseous stream from the top of the separation or ...

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Номер записи: 41
25-02-2016 дата публикации

PROCESS AND APPARATUS FOR SEPARATION OF HYDROCARBONS AND NITROGEN

Номер: US20160054054A1
Автор: Finn Adrian J., Johnson Grant Leigh
Принадлежит:

There is provided a process for the separation of a gaseous feed comprising a mixture of nitrogen, hydrocarbons and at least 0.005 mol % carbon dioxide, the process comprising: (i) cooling and at least partially condensing the gaseous feed, and (ii) separating in one or more stages the cooled and at least partially condensed gaseous feed into a hydrocarbon rich product stream low in nitrogen and a nitrogen rich reject stream low in hydrocarbons, and wherein refrigeration is provided to one or more stages of the separation process by a heat pump system in which a heat pump refrigerant fluid is compressed and subsequently expanded at one or more pressure levels below the condensing pressure, and subsequently heated in heat exchange with the gaseous feed and/or one or more streams generated by the separation process to provide refrigeration thereto; and further wherein at least part of the heated refrigerant is recycled through the heat pump system. There is also provided an apparatus for the separation of a gaseous feed comprising a mixture of nitrogen, hydrocarbons and at least 0.005 mol % carbon dioxide. 2. A process according to claim 1 , wherein the hydrocarbons in the gaseous feed comprise or consist of methane.3. A process according to claim 1 , wherein the gaseous feed comprises or consists of natural gas.4. A process according to any preceding claim claim 1 , wherein the gaseous feed comprises less than 35 mol % nitrogen gas.5. A process according to any preceding claim claim 1 , wherein the gaseous feed comprises from 5 mol % to 25 mol % nitrogen gas.6. A process according to any preceding claim claim 1 , wherein the gaseous feed comprises from 0.01 mol % to 4.0 mol % carbon dioxide.7. A process according to any preceding claim claim 1 , wherein the heat pump refrigerant fluid comprises less than 0.02 mol % carbon dioxide.8. A process according to any preceding claim claim 1 , wherein claim 1 , after expansion claim 1 , the heat pump refrigerant is at a ...

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Номер записи: 42
25-02-2016 дата публикации

Process for separating and recovering NGLs from hydrocarbon streams

Номер: US20160054055A1
Автор: Patel Kirtikumar N., Patel Rohit N.
Принадлежит:

This process comprises using unconventional processing of hydrocarbons, e.g. natural gas, for recovering C2+ and NGL hydrocarbons that meet pipeline specifications, without the core high capital cost requirement of a demethanizer column, which is central to and required by almost 100% of the world's current NGL recovery technologies. It can operate in Ethane Extraction or Ethane Rejection modes. The process uses only heat exchangers, compression and simple separation vessels to achieve specification ready NGL. The process utilizes cooling the natural gas, expansion cooling, separating the gas and liquid streams, recycling the cooled streams to exchange heat and recycling selective composition bearing streams to achieve selective extraction of hydrocarbons, in this instance being NGLs. The compactness and utility of this process makes it feasible in offshore applications as well as to implementation to retrofit/revamp or unload existing NGL facilities. Many disparate processes and derivatives are anticipated for its use. 1. A process for separating less volatile hydrocarbons from more volatile hydrocarbons while also producing stabilized condensates or NGL , comprising the steps of:a. providing a pressurized feedstock stream comprising hydrocarbons;b. directing the feedstock stream as a feed stream to a heat exchanger and then cooling the feed stream in the heat exchanger;c. further cooling the feed stream from the heat exchanger via a first gas expansion assembly;d. directing the further cooled stream from the first gas expansion assembly to a first gas/liquid mixer and separation vessel assembly and separating the further cooled stream into gas and liquid streams, wherein the first gas/liquid mixer and separation vessel assembly is capable of receiving one or more recycle streams from one or more downstream processing steps;e. directing the liquid stream from the first gas/liquid mixer and separation vessel assembly to a splitter pump capable of directing fractions ...

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Номер записи: 43
25-02-2021 дата публикации

Facility For Producing Gaseous Methane By Purifying Biogas From Landfill, Combining Membranes And Cryogenic Distillation For Landfill Biogas Upgrading

Номер: US20210055046A1
Автор: Prince Guénaël
Принадлежит:

A process and facility for producing gaseous methane by purifying biogas from landfill, can include a VOC purification unit, at least one membrane, a booster, a COpurification unit, a cryodistillation unit comprising a heat exchanger, a distillation column, and a subcooler, a deoxo, and a dryer. 1a compression unit for compressing an initial gas flow of the biogas to be purified,a VOC purification unit arranged downstream of the compression unit to receive the compressed initial flow of the biogas and comprising at least one adsorber loaded with adsorbents capable of reversibly adsorbing VOCs to thereby produce a VOC-depleted gas flow;at least one membrane arranged downstream of the VOC purification unit to receive the VOC-depleted gas flow and subject the VOC-depleted gas flow to at least one membrane separation to thereby produce a retentate;a booster arranged downstream of the membrane unit to receive the retentate from the membrane capable of increasing the pressure of the retentate to produce a pressurized retentate;{'sub': 2', '2', '2', '2, 'a COpurification unit arranged downstream of the booster to receive the pressurized retentate, wherein the COpurification unit comprises at least one adsorber loaded with adsorbents capable of reversibly adsorbing the majority of remaining COfrom the pressurized retentate to produce a CO-depleted gas flow;'}{'sub': 2', '2', '2', '2', '2', '2, 'a cryodistillation unit comprising a heat exchanger, a distillation column, and a subcooler, the cryodistillation unit arranged downstream of the COpurification unit to receive the CO-depleted gas flow and subject the CO-depleted gas flow to a cryogenic separation to separate Oand Nfrom the CO-depleted gas flow capable and to produce 2 methane enriched flows respectively a low pressure (LP) and a medium pressure (MP) methane enriched flows;'}a compressor compressing the low pressure methane enriched flow, in order to mix it with the medium pressure methane enriched flow, to produce a ...

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Номер записи: 44
23-02-2017 дата публикации

Ethane recovery and ethane rejection methods and configurations

Номер: US20170051970A1
Автор: John Mak
Принадлежит: Fluor Technologies Corp

Contemplated plants for flexible ethane recovery and rejection by allowing to switch the top reflux to the demethanizer from residue gas to the deethanizer overhead product and by controlling the flow ratio of feed gas to two different feed gas exchangers. Moreover, the pressure of the demethanizer is adjusted relative to the deethanizer pressure for control of the ethane recovery and rejection.

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Номер записи: 45
10-03-2022 дата публикации

Method of natural gas pretreatment

Номер: US20220074655A1
Автор: Alexander Roesch, Elise Renou, Jasmin JUNGER, Yufeng Qian
Принадлежит: LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude

A method of natural gas treatment including introducing a natural gas containing stream into a dryer unit, thereby producing a treated natural gas containing stream. Introducing the treated natural gas containing stream into a nitrogen rejection unit, thereby producing a further treated natural gas stream as a nitrogen rejection unit product. Splitting the nitrogen rejection unit product into at least two portions, introducing the first portion of the further treated natural gas stream into a reformer unit as first part of feed, and introducing a second portion of the further treated natural gas stream into the dryer unit as a regeneration stream, thereby producing a regeneration waste stream. Introducing at least a portion of the regeneration waste stream into the reformer unit as second part of feed.

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Номер записи: 46
04-03-2021 дата публикации

Facility For Producing Gaseous Biomethane By Purifying Biogas From Landfill Combining Membranes, Cryodistillation And Deoxo

Номер: US20210060486A1
Автор: Guenael Prince
Принадлежит: Waga Energy SA

A process and facility for producing gaseous methane by purifying biogas from landfill can include a VOC purification unit, at least one membrane, a CO2 purification unit, a cryodistillation unit comprising a heat exchanger and a distillation column, a deoxo, and a dryer.

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Номер записи: 47
21-02-2019 дата публикации

ORGANIC RANKINE CYCLE BASED CONVERSION OF GAS PROCESSING PLANT WASTE HEAT INTO POWER

Номер: US20190055857A1
Автор: Kamel Akram Hamed Mohamed, Noureldin Mahmoud Bahy Mahmoud
Принадлежит:

A system includes a waste heat recovery heat exchanger configured to heat a heating fluid stream by exchange with a heat source in a crude oil associated gas processing plant. The system includes an Organic Rankine cycle energy conversion system including a pump, an energy conversion heat exchanger configured to heat the working fluid by exchange with the heated heating fluid stream, a turbine and a generator configured to generate power by expansion of the heated working fluid, a cooling element configured to cool the expanded working fluid after power generation, and an accumulation tank. The heating fluid flows from the accumulation tank, through the waste heat recovery heat exchanger, through the Organic Rankine cycle energy conversion system, and back to the accumulation tank. 1. (canceled)2. A system comprising:a waste heat recovery heat exchanger positioned in a crude oil associated gas processing plant, the waste heat recovery heat exchanger configured to heat a heating fluid stream by exchange with a heat source in the crude oil associated gas processing plant; an energy conversion heat exchanger configured to heat a working fluid by exchange with the heated heating fluid stream;', 'a turbine and a generator, wherein the turbine and generator are configured to generate power by expansion of the heated working fluid; and', 'a cooling element configured to cool the expanded working fluid after power generation;, 'an Organic Rankine cycle energy conversion system comprisingwherein the crude oil associated gas processing plant is configured to process a hydrocarbon gas stream from a well to produce a sales gas comprising methane.3. The system of claim 2 , wherein the energy conversion heat exchanger has a thermal duty of between 3000 MM Btu/h and 3500 MM Btu/h.4. The system of claim 2 , wherein the energy conversion heat exchanger comprises an evaporator.5. The system of claim 2 , wherein the energy conversion heat exchanger is configured to heat the working ...

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Номер записи: 48
01-03-2018 дата публикации

Refrigerant Recovery in Natural Gas Liquefaction Processes

Номер: US20180058752A1
Автор: Johnston Brian Keith, Krishnamurthy Gowri, Roberts Mark Julian
Принадлежит: AIR PRODUCTS AND CHEMICALS, INC.

Described herein is a method of removing refrigerant from a natural gas liquefaction system in which vaporized mixed refrigerant is withdrawn from the closed-loop refrigeration circuit and introduced into a distillation column so as to be separated into an overhead vapor enriched in methane and a bottoms liquid enriched in heavier components. Overhead vapor is withdrawn from the distillation column to form a methane enriched stream that is removed from the liquefaction system, and bottoms liquid is reintroduced from the distillation column into the closed-loop refrigeration circuit. Also described are methods of altering the rate of production in a natural gas liquefaction system in which refrigerant is removed as described above, and a natural gas liquefaction systems in which such methods can be carried out. 1. A method of removing refrigerant from a natural gas liquefaction system during shutdown , turndown , or other occurrences or upset situations , that uses a mixed refrigerant to liquefy and/or subcool natural gas , the mixed refrigerant comprising a mixture of methane and one or more heavier components , and the liquefaction system comprising a closed-loop refrigeration circuit in which the mixed refrigerant is circulated when the liquefaction system is in use , the closed-loop refrigeration circuit including a main heat exchanger through which natural gas is fed to be liquefied and/or subcooled by indirect heat exchange with the circulating mixed refrigerant , the method comprising:(a) withdrawing vaporized mixed refrigerant from the closed-loop refrigeration circuit; wherein the vaporized mixed refrigerant is withdrawn from a shell side of the main heat exchanger;(b) introducing the vaporized mixed refrigerant into a distillation column and providing reflux to the distillation column so as to separate the vaporized mixed refrigerant into an overhead vapor enriched in methane and a bottoms liquid enriched in heavier components;(c) withdrawing overhead vapor ...

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Номер записи: 49
02-03-2017 дата публикации

MODIFIED GOSWAMI CYCLE BASED CONVERSION OF GAS PROCESSING PLANT WASTE HEAT INTO POWER AND COOLING WITH FLEXIBILITY

Номер: US20170058709A1
Автор: Kamel Akram Hamed Mohamed, Noureldin Mahmoud Bahy Mahmoud
Принадлежит:

A system includes a waste heat recovery heat exchanger configured to heat a heating fluid stream by exchange with a heat source in a crude oil associated gas processing plant; and a modified Goswami energy conversion system. The modified Goswami energy conversion system includes a first group of heat exchangers configured to heat a first portion of a working fluid by exchange with the heated heating fluid stream; and a second group of heat exchangers configured to heat a second portion of the working fluid. The modified Goswami energy conversion system includes a rectifier configured to receive the heated first and second portions of the working fluid and a third portion of the working fluid and to output an overhead discharge stream and a liquid stream, the third portion of the working fluid being at a lower temperature than the heated first and second portions of the working fluid. The modified Goswami energy conversion system includes a cooling subsystem including one or more cooling elements configured to cool a chilling fluid stream by exchange with the overhead discharge stream; and a turbine configured to generate power from the liquid stream of the working fluid. 1. A system comprising:a waste heat recovery heat exchanger configured to heat a heating fluid stream by exchange with a heat source in a crude oil associated gas processing plant; and a first group of energy conversion system heat exchangers configured to heat a first portion of a working fluid by exchange with the heated heating fluid stream, the working fluid comprising ammonia and water;', a first heat exchanger configured to heat the second portion of the working fluid by exchange with a liquid stream of the working fluid; and', 'a second heat exchanger configured to receive the second portion of the working fluid from the first heat exchanger and to heat the second portion of the working fluid by exchange with the heated heating fluid stream;, 'a second group of energy conversion system heat ...

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Номер записи: 50
20-02-2020 дата публикации

NATURAL GAS LIQUEFACTION WITH INTEGRATED NITROGEN REMOVAL

Номер: US20200056836A1
Автор: Chen Fei, Ott Christopher Michael, Roberts Mark Julian, Weist Annemarie Ott
Принадлежит: AIR PRODUCTS AND CHEMICALS, INC.

A natural gas liquefaction method and system having integrated nitrogen removal. Recycled LNG gas is cooled in a separate and parallel circuit from the natural gas stream in the main heat exchanger. Cooled recycled gas and natural gas streams are directed to a nitrogen rectifier column after the warm bundle. The recycle stream is introduced to the rectifier column above the natural gas stream and at least one separation stage is located in the rectifier column between the recycle stream inlet and the natural gas inlet. The bottom stream from the rectifier column is directed to a cold bundle of the main heat exchanger where it is subcooled. 1. A method for producing a nitrogen-depleted LNG product , the method comprising:(a) passing a natural gas feed stream through a first circuit of a main heat exchanger to cool the natural gas feed stream and liquefy at least a portion of the natural gas stream against a first refrigerant, thereby producing a first cooled LNG stream;(b) withdrawing the first cooled LNG stream from the main heat exchanger;(c) expanding the first cooled LNG stream to form a first reduced pressure LNG stream;(d) introducing the first reduced pressure LNG stream into a nitrogen rectifier column at a first location, the first location being located at a bottom end of the nitrogen rectifier column;(e) withdrawing a first LNG bottoms stream from the bottom end of the nitrogen rectifier column;(f) withdrawing an overhead stream from the nitrogen rectifier column;(g) cooling the first LNG bottoms stream to create a subcooled LNG stream;(h) directing at least a portion of the subcooled LNG stream to a flash drum or an LNG storage tank;(i) collecting at least one selected from the group of: a flash gas stream from the flash drum and a boil-off gas stream from the LNG storage tank to form a recycle stream;(j) passing the recycle stream through a second circuit of the main heat exchanger to cool the recycle stream and liquefy at least a portion of the recycle ...

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Номер записи: 51
10-03-2016 дата публикации

Production of ammonia make-up syngas with cryogenic purification

Номер: US20160068389A1
Автор: Ermanno Filippi, Geoffrey Frederick Skinner
Принадлежит: Casale SA

A process and a related equipment for making ammonia make-up synthesis gas are disclosed, where: a hydrocarbon feedstock is reformed obtaining a raw ammonia make-up syngas stream; said raw syngas is purified in a cryogenic purification section refrigerated by a nitrogen-rich stream produced in an air separation unit; the nitrogen-rich stream at output of said cryogenic section is further used for adjusting the hydrogen/nitrogen ratio of the purified make-up syngas; an oxygen-rich stream is also produced in said air separation unit and is fed to the reforming section.

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Номер записи: 52
28-02-2019 дата публикации

Flare Recovery with Carbon Capture

Номер: US20190063826A1
Автор: Prim Eric
Принадлежит:

A flare recovery method includes receiving a flare gas inlet stream that has C-Chydrocarbons. The flare gas inlet stream is separated in a recovery column to produce a C-Chydrocarbon stream and a C-Chydrocarbon stream. The C-Chydrocarbon stream is separated in a separation column to produce a Chydrocarbon stream and a C-Chydrocarbon stream. The C-Chydrocarbon stream is transported to a location for blending with crude oil. The Chydrocarbon stream is optionally recovered as a saleable product or is combined with the C-Chydrocarbon stream to produce a flare gas stream. 157-. (canceled)58. A method for flare recovery , comprising:{'sub': 1', '8, 'receiving a gas inlet stream, the gas inlet stream comprising C-Chydrocarbons;'}{'sub': 1', '2', '3', '8, 'separating the gas inlet stream in a recovery column to produce a C-Chydrocarbon stream and a C-Chydrocarbon stream;'}{'sub': 3', '8', '3', '4', '8, 'separating the C-Chydrocarbon stream in a separation column to produce a Chydrocarbon stream and a C-Chydrocarbon stream;'}{'sub': '3', 'recovering the Chydrocarbon stream; and'}{'sub': 4', '8', '9+, 'combining the C-Chydrocarbon stream with a C hydrocarbon stream.'}59. The method of claim 58 , wherein the gas inlet stream comprises 96-100 mole % C-Chydrocarbons claim 58 , 0-2 mole % carbon dioxide claim 58 , and 0-2 mole % nitrogen claim 58 , the C-Chydrocarbon stream comprises 80 mole % C-Chydrocarbons claim 58 , 10-20 mole % Chydrocarbons claim 58 , 0-2 mole % C-Chydrocarbons claim 58 , 0-2 mole % carbon dioxide claim 58 , and 0-2 mole % nitrogen claim 58 , the C-Chydrocarbon stream comprises 5-15 mole % C-Chydrocarbons claim 58 , 85-95 mole % C-Chydrocarbons claim 58 , and 0-2 mole % carbon dioxide claim 58 , the Chydrocarbon stream comprises 30-40 mole % C-Chydrocarbons claim 58 , 60-70 mole % Chydrocarbons claim 58 , 0-2 mole % C-Chydrocarbons claim 58 , and 0-2 mole % carbon dioxide claim 58 , and the C-Chydrocarbon stream comprises 0 mole % C-Chydrocarbons claim 58 , ...

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Номер записи: 53
08-03-2018 дата публикации

PRETREATMENT OF NATURAL GAS PRIOR TO LIQUEFACTION

Номер: US20180066889A1
Автор: Gaskin Thomas K., Guvelioglu Galip H., Palacios Vanessa M., Yamin Fereidoun
Принадлежит:

Method and system for removing high freeze point components from natural gas. Feed gas is cooled in a heat exchanger and separated into a first vapor portion and a first liquid portion. The first liquid portion is reheated using the heat exchanger and separated into a high freeze point components stream and a non-freezing components stream. A portion of the non-freezing components stream may be at least partially liquefied and received by an absorber tower. The first vapor portion may be cooled and received by the absorber tower. An overhead vapor product which is substantially free of high freeze point freeze components and a bottoms product liquid stream including freeze components and non-freeze components are produced using the absorber tower. 1. A method for removing high freeze point components from natural gas , comprising:cooling a feed gas in a heat exchanger;separating the feed gas into a first vapor portion and a first liquid portion in a separation vessel;reheating the first liquid portion using the heat exchanger;separating the reheated first liquid portion into a high freeze point components stream and a non-freezing components stream;at least partially liquefying the non-freezing components stream;receiving, at an upper feed point of an absorber tower, the at least partially liquefied non-freezing component stream;receiving, at a lower feed point of the absorber tower, the first vapor portion of the separated feed gas that has been cooled;producing, using the absorber tower, an overhead vapor product which is substantially free of high freeze point freeze components and a bottoms product liquid stream including freeze components and non-freeze components; andreheating the overhead vapor product from the absorber tower using the heat exchanger.2. The method of claim 1 , wherein the absorber tower includes one or more mass transfer stages.3. The method of claim 1 , further comprising compressing the reheated overhead vapor product using an expander- ...

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Номер записи: 54
27-02-2020 дата публикации

System and Method for Natural Gas Liquid Production with Flexible Ethane Recovery or Rejection

Номер: US20200064064A1
Автор: Butts Rayburn C.
Принадлежит:

A system and method for processing an NGL product stream from a natural gas feed stream in either an ethane retention or ethane rejection mode utilizing heat exchange of particular process streams. In ethane rejection mode, there are preferably two stages of heat exchange between the feed stream and a first separator bottoms stream and a side stream withdrawn from a fractionation tower is cooled through heat exchange with both the fractionation tower and second separator overhead streams, and optionally with an external refrigerant, resulting in 5-15% ethane and at least 97% propane recovery. In ethane retention mode, a portion of the feed stream and portions of a first separator overhead and bottoms streams are preferably separately cooled through heat exchange with other process streams, including the entireties of a recycled residue gas and fractionation column overhead streams, resulting in around 99% ethane and around 100% propane recovery. 1. A system for processing a feed stream comprising methane , ethane , propane , and other components in either an ethane rejection mode or ethane retention mode to produce an NGL product stream and a residue gas stream , system comprising:a first separator wherein the feed stream is separated into a first overhead stream and a first bottoms stream;a fractionation column wherein the first overhead stream and first bottoms stream are separated into a second overhead stream and a second bottoms stream, wherein the residue gas stream comprises the second overhead stream and the NGL product stream comprises the second bottoms stream;a first heat exchanger for cooling at least a first portion of the feed stream prior to the first separator through heat exchange with a first set of other streams;a second heat exchanger for warming the second overhead stream prior to the first heat exchanger through heat exchange with a second set of other streams;wherein the first set of other streams comprises (1) the first bottoms stream, the ...

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Номер записи: 55
11-03-2021 дата публикации

PROCESS AND PLANT FOR PRODUCING LIQUEFIED NATURAL GAS

Номер: US20210071091A1
Автор: FRITZ Helmut, KELLER Tobias, Leitmayr Werner, Voss Christian
Принадлежит:

The invention relates to a process () for producing liquefied natural gas using a feedstock mixture that contains at least methane, one or more components boiling at a temperature lower than methane and one or more hydrocarbons boiling at a temperature higher than methane, wherein the hydrocarbon(s) boiling at a temperature higher than methane comprise one or more hydrocarbons freezing at a higher temperature, with a freezing point higher than −50° C. According to the invention the feedstock mixture is fed into a pressure swing adsorption process (), in which a first fraction containing methane and a second fraction containing methane are formed, the first fraction containing methane contains, in addition to the methane, at least the predominant portion of the components of the feedstock mixture that boil more readily than methane and is low in or free from the hydrocarbons boiling less readily than methane, and the second fraction containing methane contains, in addition to the methane, at least the predominant portion of the hydrocarbons from the feedstock that boil less readily than methane and is low in or free from the components that boil more readily than methane, and the first fraction containing methane, or a portion thereof, is supplied for liquefaction (). The invention also relates to a corresponding plant. 2100102020. Process () according to claim 1 , wherein the first fraction containing methane is provided by means of the pressure swing adsorption process () at an absolute pressure level of 20 to 40 bar claim 1 , and wherein the first fraction containing methane claim 1 , or the portion thereof supplied for liquefaction () claim 1 , is supplied for liquefaction () at this absolute pressure level.310030. Process () according to claim 1 , wherein the second fraction containing methane is provided in the pressure swing adsorption process at an absolute pressure level of 0.1 to 5 bar claim 1 , and wherein the second fraction containing methane claim 1 , ...

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Номер записи: 56
11-03-2021 дата публикации

METHOD AND APPARATUS FOR AN IMPROVED CARBON MONOXIDE COLD BOX OPERATION

Номер: US20210071947A1
Автор: Barnes David R, Coleman Luke J, Schwartz Joseph M, Shah Minish Mahendra
Принадлежит:

The present invention is directed to a method and system of separating carbon monoxide from syngas mixtures with low methane content by cryogenic means where a partial condensation cycle is generally employed, and more specifically towards providing a methane slip stream to the feed in order to reduce the potential for any carbon dioxide entering the cold box to freeze, thereby preventing plugging of the cold box heat exchanger. 1. A method for reducing carbon dioxide freezing in a partial condensation carbon monoxide cold box that separates a combined cold box syngas feed stream , comprising:cooling and partially condensing the combined cold box syngas feed stream in a process heat exchanger to produce a cooled and partially condensed syngas feed stream;separating the cooled and partially condensed syngas feed stream into a hydrogen rich vapor stream and a carbon monoxide rich liquid stream in a single-stage high-pressure separator;routing the carbon monoxide rich liquid stream to a downstream separation train to separate and form at least a CO-rich stream, a methane-rich liquid stream, and a flash gas vapor stream;{'sub': '2', 'wherein a methane-rich stream is added to the syngas feed upstream of a COfreeze zone in the process heat exchanger to increase the concentration of methane in the mixture thereby reducing carbon dioxide freezing in the partial condensation carbon monoxide cold box.'}2. The method of in which a methane-rich liquid stream is vaporized in the process heat exchanger to form a methane-rich gas stream.3. The method of in which at least a portion of the methane-rich gas stream is introduced into the combined cold box syngas feed before it enters the freeze zone in the process heat exchanger.4. The method of claim 1 , wherein the dew point temperature of the syngas feed is raised to about 103-113° K in the combined cold box feed stream.5. The method of claim 1 , wherein the methane-rich recycle stream contains 10-98% methane by volume.6. The ...

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Номер записи: 57
15-03-2018 дата публикации

MODIFIED GOSWAMI CYCLE BASED CONVERSION OF GAS PROCESSING PLANT WASTE HEAT INTO POWER AND COOLING WITH FLEXIBILITY

Номер: US20180073400A1
Автор: Kamel Akram Hamed Mohamed, Noureldin Mahmoud Bahy Mahmoud
Принадлежит:

A system includes a waste heat recovery heat exchanger configured to heat a heating fluid stream by exchange with a heat source in a crude oil associated gas processing plant; and a modified Goswami energy conversion system. The modified Goswami energy conversion system includes a first group of heat exchangers configured to heat a first portion of a working fluid by exchange with the heated heating fluid stream; and a second group of heat exchangers configured to heat a second portion of the working fluid. The modified Goswami energy conversion system includes a rectifier configured to receive the heated first and second portions of the working fluid and a third portion of the working fluid and to output an overhead discharge stream and a liquid stream, the third portion of the working fluid being at a lower temperature than the heated first and second portions of the working fluid. The modified Goswami energy conversion system includes a cooling subsystem including one or more cooling elements configured to cool a chilling fluid stream by exchange with the overhead discharge stream; and a turbine configured to generate power from the liquid stream of the working fluid. 1. (canceled)2. An energy conversion system comprising:a first heat exchanger configured to heat a first portion of a working fluid using heat recovered from a heat source in a crude oil associated gas processing plant;a second heat exchanger configured to heat a second portion of the working fluid by exchange with a liquid stream of the working fluid;a separation element configured to receive the heated first and second portions of the working fluid, the separation element being configured to output a vapor stream of the working fluid and the liquid stream of the working fluid;a cooling element configured to cool a chilling fluid stream by exchange with at least a portion of the vapor stream of the working fluid; anda turbine configured to generate power from the liquid stream of the working fluid. ...

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Номер записи: 58
16-03-2017 дата публикации

Method and system to control the methane mass flow rate for the production of liquefied methane gas (lmg)

Номер: US20170074583A1
Автор: Alain Roy, Charles Tremblay, Simon Jasmin
Принадлежит: RTJ TECHNOLOGIES Inc

The system is provided for generating a mixed methane gas feed stream using at least one source of biogas and an alternate source of methane gas. The system includes a biogas subsystem, a control device for the methane gas from the at least one alternate source of methane gas, and a vertically-extending gas mixing vessel. A method of controlling a methane gas mass flow rate of a mixed methane gas feed stream is also disclosed. The proposed concept is particularly well adapted for situations where an uninterrupted and relatively constant input of methane gas is required to ensure an optimum operation of, for instance, a LMG production plant.

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Номер записи: 59
05-03-2020 дата публикации

GAS SUBCOOLED PROCESS CONVERSION TO RECYCLE SPLIT VAPOR FOR RECOVERY OF ETHANE AND PROPANE

Номер: US20200072546A1
Автор: Farr David, Garrison Jeffrey R., Thom David M.
Принадлежит:

A design is provided to convert a gas subcooled process plant to a recycle split vapor process for recovering ethane and propane from natural gas. When in operation, the recovery of ethane and propane can exceed 97 to 99 wt. % of the stream being processed. A second smaller demethanizer column is added to the gas subcooled process plant as well as the addition of several cryogenic pumps. 1. A process for the separation of a gas stream containing methane , C2 components , C3 components , and heavier hydrocarbon components into a volatile residue gas fraction and a relatively less volatile fraction containing said C2. components , C3 components and heavier hydrocarbon components or said C3 components and heavier hydrocarbon components in a fractionation tower , comprising the steps of:dividing said gas stream into a gaseous first stream and a gaseous second stream;cooling said gaseous second stream under pressure sufficiently to partially condense;separating said partially condensed second stream to thereby provide a vapor stream and a condensed stream;expanding said vapor stream to a lower pressure and supplying it at a first mid-column feed position within a lower region of the fractionation tower;expanding at least a portion of the condensed stream to said lower pressure and supplying it to said fractionation tower at a second mid-column feed position;withdrawing a distillation stream from an upper region of the fractionation tower;sending said distillation stream to a lower region of a second fractionation tower that smaller than said first fractionation tower;removing a more volatile stream from said second fractionation tower to be sent to a residue gas stream; andremoving a less volatile stream from said second fractionation tower and sending at least a portion of said less volatile stream to said first fractionation tower,2. The process of wherein said second fractionation tower is about 10 to 50% of the height of said fractionation tower.3. The process of ...

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Номер записи: 60
18-03-2021 дата публикации

METHOD OF COOLING A NATURAL GAS FEED STREAM AND RECOVERING A NATURAL GAS LIQUID STREAM FROM THE NATURAL GAS FEED STREAM

Номер: US20210080174A1
Автор: AGBARAKWE Uchenna McDonald, DEN HEIJER Mark
Принадлежит:

The invention relates to a method and system for cooling a natural gas feed stream and recovering a natural gas liquid stream from the natural gas feed stream using an expansion-based cooling unit and a natural gas liquid removal unit which are integrated. The integration is done by using (part of) a cooling stream from the expansion-based cooling unit to provide cooling duty to the natural gas liquid removal unit. 1. A method of cooling a natural gas feed stream and recovering a natural gas liquid stream from the natural gas feed stream , the method comprising:a) operating an expansion based cooling unit, comprising obtaining a cooling stream being derived from the natural gas feed stream,{'sub': '5', 'sup': '+', 'claim-text': {'sub': '5', 'sup': '+', 'wherein the method comprises cooling the C depleted top stream in an overhead condenser against at least part of the cooling stream.'}, 'b) operating a natural gas liquid removal unit, comprising passing a feed stream being derived from the natural gas feed stream to a separation unit and obtaining a C depleted top stream from the separation unit,'}2. The method according to comprising: a1) obtaining a compressed process stream and a cooling stream from a pressure unit, both the compressed process stream and the cooling stream being derived from the natural gas feed stream,', 'a2) passing the compressed process stream and at least part of the cooling stream to an indirect heat exchanger to cool the compressed process stream against the at least part of the cooling stream to obtain a cooled compressed process stream and a warmed cooling stream,', 'a3) recycling the warmed cooling stream to the pressure unit to be comprised in the compressed process stream and/or the cooling stream,, 'a) operating an expansion based cooling unit, comprising'} [{'sub': '5', 'sup': '+', 'b1) passing a feed stream being derived from the natural gas feed stream to a separation unit and obtaining the natural gas liquid stream from a lower ...

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Номер записи: 61
23-03-2017 дата публикации

Heating Component to Reduce Solidification in a Cryogenic Distillation System

Номер: US20170082357A1
Автор: KELMAN Scott D., KIMBLE E. Lawrence, Smith Ransdall K., Valencia Jaime A.
Принадлежит:

A method and a system for feeding a feed gas including methane (CH) and carbon dioxide (CO) to a cryogenic distillation column are provided herein. The method includes flowing a freeze zone COvapor stream into a freezing section of the column to produce an overhead stream that exits the column. The method includes heating the overhead stream via a heating component to reduce or prevent solidification of the COin the overhead stream. 1. A method comprising:{'sub': 4', '2, 'feeding a feed gas comprising methane (CH) and carbon dioxide (CO) to a cryogenic distillation column during start-up of the cryogenic distillation column;'}producing an acid gas rich bottom stream and a freeze zone vapor stream;flowing the freeze zone vapor stream into a freezing section of the cryogenic distillation column, wherein the freeze zone vapor stream exits the cryogenic distillation column as an overhead stream;{'sub': '2', 'heating the overhead stream via a heating component to form a heated overhead stream to reduce or prevent solidification of the COin the overhead stream;'}flowing the heated overhead stream into a heat exchanger to substantially reduce or prevent solidification in the heat exchanger;compressing the heated overhead stream via an overhead compressor to produce a high-pressure vapor; andreducing pressure of the high-pressure vapor to produce a liquid-vapor stream at an inlet of the cryogenic distillation column, wherein the liquid-vapor stream is introduced into the cryogenic distillation column as a refluxing spray.2. The method of claim 1 , wherein the heating of the overhead stream comprises raising a temperature of the overhead stream by about 0.5° F. to about 10° F.3. The method of claim 1 , comprising measuring a temperature of the heated overhead stream at an inlet of the heat exchanger.4. The method of claim 1 , comprising regulating an amount of heat emitted by the heating component via a control system claim 1 , wherein the control system maintains a ...

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Номер записи: 62
25-03-2021 дата публикации

METHOD FOR DISTILLING A GAS STREAM CONTAINING OXYGEN

Номер: US20210086129A1
Автор: CHANTANT Nicolas, Terrien Paul
Принадлежит:

A process for producing biomethane by scrubbing a biogas feed stream includes introducing the feed gas stream into a pretreatment unit wherein a CO-depleted gas stream is partially separated from a COstream and an oxygen stream and is compressed to a pressure P1 above 25 bar abs. Subjecting the CO-depleted gas stream to cryogenic separation in a distillation column to separate a nitrogen stream and produce a CH-enriched stream, the distillation column comprising n plates, n being an integer between 8 and 100. Recovering a pressurized CH-enriched stream by pumping the CO-depleted gas stream to a pressure P2 above 25 bar absolute. 110-. (canceled)12. The process of claim 11 , wherein when C1 is greater than 0.5 mol % and less than or equal to 1 mol % claim 11 , the CO-depleted gas stream is introduced into the distillation column at the level of plate n claim 11 , plate n being the plate that is positioned the highest in said column.13. The process of claim 11 , wherein n is between 15 and 100 and wherein when C1 is less than or equal to 0.1 mol % claim 11 , the CO-depleted gas stream is introduced into the distillation column at a level between plate n-10 and plate n-5 claim 11 , platen being the plate that is positioned the highest in said column.14. The process of claim 11 , wherein P1 is greater than 50 bar absolute.15. The process of claim 11 , wherein step a) further comprises scrubbing the water from the gas stream compressed to the pressure P1.16. The process of claim 11 , wherein the separation of the COand of the oxygen from the feed gas stream is performed by a unit comprising at least two separating membrane stages.17. The process of claim 11 , wherein the pressure P2 is greater than 40 bar abs.18. The process of claim 11 , wherein claim 11 , during step b) claim 11 , the CO-depleted gas stream undergoes an expansion to a pressure P3 of between 15 bar abs and 40 bar abs prior to being introduced into said distillation column.19. The process of claim 11 , ...

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Номер записи: 63
12-03-2020 дата публикации

NATURAL GAS LIQUID FRACTIONATION PLANT WASTE HEAT CONVERSION TO SIMULTANEOUS POWER AND POTABLE WATER USING KALINA CYCLE AND MODIFIED MULTI-EFFECT-DISTILLATION SYSTEM

Номер: US20200080447A1
Автор: Kamel Akram Hamed Mohamed, Noureldin Mahmoud Bahy Mahmoud
Принадлежит: Saudi Arabian Oil Company

Flowing a first buffer fluid and a second buffer fluid through a heat exchanger network thermally coupled to heat sources of a Natural Gas Liquid (NGL) fractionation plant, and transferring heat from the heat sources to the first buffer fluid and the second buffer fluid. Generating power via a first sub-system thermally coupled to the heat exchanger network and generating potable water from brackish water via a second sub-system thermally coupled to the heat exchanger network. 1. A method comprising:flowing a first buffer fluid and a second buffer fluid through a heat exchanger network thermally coupled to a plurality of heat sources of a Natural Gas Liquid (NGL) fractionation plant, wherein the heat exchanger network is a waste heat recovery heat exchanger network comprising heat exchangers;transferring heat, via the heat exchanger network, from the plurality of heat sources to the first buffer fluid and the second buffer fluid;generating power via a first sub-system thermally coupled to the heat exchanger network; andgenerating potable water from brackish water via a second sub-system thermally coupled to the heat exchanger network.2. The method of claim 1 , wherein the plurality of heat sources comprise:a first plurality of sub-units of the NGL fractionation plant, the first plurality of sub-units comprising a de-ethanizer section, a propane dehydration section, a de-propanizer section, a butane de-hydrator section, and a de-butanizer section;a second plurality of sub-units of the NGL fractionation plant, the second plurality of sub-units comprising a de-pentanizer section, an Amine-Di-Iso-Propanol (ADIP) regeneration section, a natural gas de-colorizing section, a propane vapor recovery section, and a propane product refrigeration section; anda third plurality of sub-units of the NGL fractionation a propane product sub-cooling section, a butane product refrigeration section, an ethane production section, and a Reid Vapor Pressure (RVP) control section.3. The ...

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Номер записи: 64
19-06-2014 дата публикации

PURIFICATION OF INERT GASES TO REMOVE TRACE IMPURITIES

Номер: US20140165648A1
Автор: Gary Daniel, HA Bao, Shanbhag Purushottam V.
Принадлежит: Air Liquide Process & Construction, Inc.

A method for purifying an argon stream is provided. The method includes pretreating an argon waste stream to remove impurities to provide a pre-treated argon waste stream having argon, nitrogen, and hydrogen; cooling the argon waste stream to create a cold feed stream; and condensing the cold feed stream to create a liquid feed stream. The liquid feed stream is fed to the cryogenic distillation column to create a bottoms argon product stream and a gas waste stream. The bottoms argon product stream travels to an expansion device to provide a cooled bottoms argon product stream, which can optionally be combined with an argon lift stream downstream of the expansion device. The combined argon lift stream and cooled bottoms argon product stream are fed to the overhead condenser and vaporized to create a purified vapor phase argon stream. 1. A method for purifying an argon stream comprising argon , nitrogen , hydrogen , carbon monoxide , carbon dioxide , water , and methane , the method comprising the steps of:cooling an argon waste stream with a cryogenic heat exchanger to create a cold feed stream;condensing the cold feed stream in a reboiler to create a liquid feed stream, wherein the cold feed stream is in a heat exchange relationship with bottoms liquid of a cryogenic distillation column, said distillation column comprising packing, the reboiler disposed in a lower portion of the cryogenic distillation column, and an overhead condenser in an upper portion of the cryogenic distillation column;withdrawing the liquid feed stream from the reboiler and introducing the liquid feed stream to the cryogenic distillation column;separating components of the liquid feed stream in the cryogenic distillation column into a bottoms argon product stream and a gas waste stream, the bottoms argon product stream having an increased purity of argon as compared to the cold feed stream;withdrawing the bottoms argon product stream from the cryogenic distillation column and expanding the ...

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Номер записи: 65
25-03-2021 дата публикации

METHOD FOR PRODUCING PURE NITROGEN FROM A NATURAL GAS STREAM CONTAINING NITROGEN

Номер: US20210088276A1
Автор: LICHTLE Sébastien, MUHR Marie, PARADOWSKI Henri
Принадлежит:

A process for liquefying a natural gas feed stream including cooling a feed gas stream to obtain a liquefied natural gas stream; introducing the liquefied natural gas stream into a deazotization column to produce a liquefied natural gas stream and a nitrogen-enriched vapor stream; at least partially condensing at least part of the nitrogen-enriched vapor stream to produce a two-phase stream; introducing the two-phase stream into a phase-separating vessel to produce a first liquid stream and a first nitrogen-enriched gas stream; introducing at least part of the nitrogen-enriched gas stream into a distillation column thereby producing a second nitrogen-enriched stream containing less than 1 mol % of methane and a second liquid stream containing less than 10 mol % of nitrogen; wherein at least part of the liquefied natural gas stream is used to cool the at least part of the nitrogen-enriched vapor stream in said heat exchanger. 113.-. (canceled)15. The process of claim 14 , wherein the natural gas feed stream and a second coolant mixture are cooled by indirect heat exchange with at least one first coolant mixture to obtain a cooled natural gas and a second cooled coolant mixture claim 14 , and the cooled natural gas is then condensed and cooled by indirect heat exchange with at least the second cooled coolant mixture to obtain a liquefied natural gas.16. The process of claim 14 , wherein the second nitrogen-enriched stream contains less than 100 molar ppm of methane and the second liquid stream contains less than 4 mol % of nitrogen.172. The process of claim 14 , wherein the liquefied natural gas stream is cooled in a reboiling means of said deazotization column down to the temperature T.182. The process of claim 14 , wherein the stream cooled to the temperature T is expanded in an expansion means before being introduced into the deazotization column.19. The process of claim 14 , wherein at least part of the first liquid stream is used as reflux at the top of the ...

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Номер записи: 66
29-03-2018 дата публикации

PROCESS FOR REMOVING NITROGEN FROM HIGH-FLOW NATURAL GAS

Номер: US20180087833A1
Автор: Murino Michele, Peyron Jean-Marc, Terrien Paul
Принадлежит:

A process for separating the components of a gas mixture comprising methane, nitrogen, and at least one hydrocarbon having at least two carbon atoms, or a mixture of these hydrocarbons, including the following steps: a) introduction of a stream of the mixture to be treated into a demethanization of the gas mixture with at least N demethenization column; b) partial condensation of a gas mixture, comprising less than 1 mol % of hydrocarbons having at least two carbon atoms, extracted from the demethanization unit to obtain a liquid, at least a portion of which is treated in order to be extracted as denitrogenated natural gas and a second gas, c) introduction of the second gas into a nitrogen removal unit having N nitrogen removal columns. 16-. (canceled)8. The process as claimed in claim 7 , further comprising the additional step:d) treating said gas from step c) in a second nitrogen removal unit in order to produce a gaseous nitrogen stream comprising at most 2 mol % of methane and a gaseous methane stream comprising at most 5 mol % of nitrogen.9. The process as claimed in claim 8 , wherein the second nitrogen removal unit (B) comprises at most N−1 nitrogen removal columns.10. The process as claimed in claim 7 , wherein N is greater than or equal to 6.11. The process as claimed in claim 10 , wherein the second nitrogen removal unit comprises between N−5 nitrogen removal columns and N−1 nitrogen removal columns.12. The process as claimed in claim 7 , wherein the steps b) and c) are carried out at a temperature below −50° C. and the fluid is not reheated above −50° C. between step b) and step c). This application is a 371 of International PCT Application PCT/FR2015/052632, filed Oct. 1, 2015, which claims priority to French Patent Application No. 1552781, filed Apr. 1, 2015, the entire contents of which are incorporated herein by reference.The present invention relates to a process for separating the components of a gas mixture containing methane, nitrogen and ...

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Номер записи: 67
21-03-2019 дата публикации

METHODS AND APPARATUS FOR GENERATING A MIXED REFRIGERANT FOR USE IN NATURAL GAS PROCESSING AND PRODUCTION OF HIGH PURITY LIQUEFIED NATURAL GAS

Номер: US20190086147A1
Автор: Brown, III William George, Minton Billy Roger
Принадлежит:

A novel method and system for liquefying and distilling raw natural gas into NGL and liquid methane (LNG) product streams, with at least one novel feature including the use of a mixed refrigerant comprising naturally occurring natural gas liquids that were recovered from the inlet gas stream being processed. Heat exchangers and distillation towers are configured to produce high purity liquefied natural gas (LNG) and NGL product streams, utilizing liquid NGL as the process refrigerant for both systems. 1. A method of operating a gas processing plant by using an NGL product from the gas processing plant as a mixed refrigerant for liquefying an inlet hydrocarbon gas being introduced to said gas processing plant , wherein said liquefied inlet hydrocarbon gas is further processed into the NGL product and a methane rich residue gas the method comprising:introducing the inlet hydrocarbon gas to a first heat exchange unit utilizing a mixed refrigerant to produce a cooled hydrocarbon gas having a liquid portion and a vapor portion;flowing the liquid and vapor portions to a first pressurized distillation tower;flowing a vapor product of hydrocarbons comprising methane rich residue gas from the first pressurized distillation tower;flowing NGL product from the first pressurized distillation tower;flowing said NGL product to at least the first heat exchange unit said NGL product to be used as the mixed refrigerant to aid in cooling of the hydrocarbon gas.2. The method of claim 1 , further comprising vaporizing at least a portion of the mixed refrigerant forming a mixed refrigerant vapor portion and a mixed refrigerant liquid portion claim 1 , separating the mixed refrigerant vapor portion from the mixed refrigerant liquid portion claim 1 , recompressing and condensing that vapor portion and recombining with the liquid portion to form a final NGL product.3. The method of claim 1 , wherein the NGL product contains a percentage of ethane and methane claim 1 , the method further ...

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Номер записи: 68
19-03-2020 дата публикации

Helium Extraction from Natural Gas

Номер: US20200088465A1
Автор: Higginbotham Paul, White Vincent
Принадлежит: AIR PRODUCTS AND CHEMICALS, INC.

A crude helium stream is recovered from a natural gas feed by distillation. Refrigeration from expanding a portion of the bottoms liquid is used to partially condense the helium-enriched overhead vapor and generate a crude helium vapor and a helium-containing liquid stream that is recycled to the distillation column to maximize helium recovery. The helium-depleted natural gas stream can be returned at pressure for utilization or transportation. 1. A process for recovering helium from a natural gas feed comprising methane , nitrogen , and helium , said process comprising:cooling said natural gas feed to produce a cooled natural gas feed which is at least partially condensed;separating the cooled natural gas feed in a distillation column system to produce a helium-enriched overhead vapor and a helium-depleted bottoms liquid;cooling said helium-enriched overhead vapor to produce a partially condensed overhead stream;separating said partially condensed overhead stream in an overhead separator to produce a crude helium vapor and a recycle liquid;expanding at least a portion of the helium-depleted bottoms liquid to produce a first helium-depleted bottoms fraction;wherein cooling duty for cooling said helium-enriched overhead vapor is provided at least in part by indirect heat exchange with said first helium-depleted bottoms fraction.2. Process of wherein the pressure of said cooled natural gas feed is reduced to achieve a ratio of liquid to vapor density in the distillation column greater than 4.3. Process of wherein the pressure of said cooled natural gas feed is reduced to achieve a liquid phase surface tension in the distillation column greater than 0.5 dyne/cm.4. Process of wherein the difference between the pressure of the top of the distillation column system and the pressure of said overhead separator is no more than 1 bar.5. Process of wherein the re-boiling duty for said distillation column system is provided at least in part by indirect heat exchange with the ...

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Номер записи: 69
19-03-2020 дата публикации

Helium Extraction from Natural Gas

Номер: US20200088466A1
Автор: Jason Michael Ploeger, Paul Higginbotham, Vincent White
Принадлежит: Air Products and Chemicals Inc

A helium-containing stream is recovered from a natural gas feed using a membrane followed by multiple distillation steps. Refrigeration is provided by expanding a bottoms liquid with a higher nitrogen content than the feed, achieving a lower temperature in the process. The helium-enriched vapor is then purified and the helium-containing waste stream is recycled to maximize recovery and reduce the number of compressors needed. The helium-depleted natural gas stream can be returned at pressure for utilization or transportation.

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Номер записи: 70
01-04-2021 дата публикации

INTEGRATED METHODS AND CONFIGURATIONS FOR PROPANE RECOVERY IN BOTH ETHANE RECOVERY AND ETHANE REJECTION

Номер: US20210095921A1
Автор: Mak John, Schulte Dave, SHIH James
Принадлежит: FLUOR TECHNOLOGIES CORPORATION

A natural gas liquids (NGL) plant, the NGL plant comprising an absorber configured to provide an absorber overhead and an absorber bottoms, a stripper configured to produce a stripper overhead and a stripper bottoms, wherein the stripper is positioned downstream from the absorber and fluidly connected therewith such that the absorber bottoms can be introduced into the stripper, and a multi-pass heat exchanger configured to provide at least one reflux stream to the absorber, wherein the absorber and stripper are configured, in an ethane rejection arrangement, to provide the stripper overhead to a top of the absorber, and wherein the absorber and stripper are configured, in an ethane recovery arrangement, to provide the stripper overhead to a bottom of the absorber. 1. A natural gas liquids (NGL) plant , the NGL plant comprising:an absorber configured to provide an absorber overhead and an absorber bottoms;a stripper configured to produce a stripper overhead and a stripper bottoms, wherein the stripper is positioned downstream from the absorber and fluidly connected therewith such that the absorber bottoms can be introduced into the stripper; anda multi-pass heat exchanger configured to provide at least one reflux stream to the absorber wherein the multi-pass heat exchanger is configured, in the ethane recovery arrangement, to provide at least two reflux streams to the absorber,wherein the absorber and stripper are configured, in an ethane rejection arrangement, to provide the stripper overhead to a top of the absorber, and wherein the absorber and stripper are configured, in an ethane recovery arrangement, to provide the stripper overhead to a bottom of the absorber.2. (canceled)3. The NGL plant of claim 1 , wherein the stripper is configured claim 1 , in the ethane recovery arrangement claim 1 , as a demethanizer to provide a stripper bottoms comprising less than 1 vol % methane claim 1 , and the stripper is configured claim 1 , in the ethane rejection arrangement ...

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Номер записи: 71
12-05-2022 дата публикации

METHOD AND SYSTEM FOR PROCESSING NATURAL GAS

Номер: US20220146194A1
Автор: Mealey Willard Brent, Wu Anthony Hok Shing
Принадлежит: CEMM Canada Limited

Methods and systems for processing natural gas to meet gas pipeline specifications and/or recovering natural gas liquids (NGL). The natural gas is cooled and distilled such that propane and heavier components are produced as a bottoms NGL product, and inerts, methane, ethane, and other lighter portions are produced as a fuel gas grade/quality residue gas product stream. The gas can optionally be treated to remove hydrogen-sulfide and/or carbon dioxide. The NGL product can be split into a marketable propane and butane liquefied petroleum gas (LPG) liquid product and a natural gas condensate product. 1. A system for processing natural gas , the system comprising:a compressor for compressing the natural gas into a compressed gas;a cooling unit for cooling the compressed gas, a three-way valve downstream of the cooling unit;an ethylene glycol regeneration unit for injecting ethylene glycol into the cooling unit; 'a deethanizer comprising a top section and a bottom section; the top section configured to separate the heated hydrocarbon liquid into a top section gas and a top section liquid, the top section liquid sent to the bottom section; and the bottom section configured to separate the top section liquid into a bottom section gas and a bottom section liquid, the bottom section gas sent to the top section and the bottom section liquid sent to a natural gas liquids cooler, resulting in a natural gas liquids product for discharge to a natural gas liquids line;', 'a low-temperature gas-liquid phase separator for: separating the cooled compressed gas into a separator gas, a hydrocarbon liquid and a liquid water/ethylene glycol; directing the separator gas to the cooling unit before filtering and discharge to a natural gas product line as a natural gas product or after compression in a compressed natural gas compressor to a compressed natural gas line as a compressed natural gas product; directing the hydrocarbon liquid to at least one condenser for heating to form a heated ...

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Номер записи: 72
08-04-2021 дата публикации

Natural Gas Liquids Recovery Process

Номер: US20210102133A1
Автор: Al-Kalaf Yaqoub Y., Andrian Diki, Mohammad Ayman M.
Принадлежит:

Methods and systems for operating and NGL recovery process are provided. In an exemplary method, an absorber column upstream of a fractionator column is operated at a higher pressure than a pressure in the fractionator column. An NGL (Cplus) stream is taken from the bottom of a fractionator column and then ethylene/ethane stream is taken from the top of the fractionator column. A differential pressure between the absorber column and the fraction are column is controlled based, at least in part, on a flow rate of the fractionator feed stream from the absorber column to the fractionator column. 1. A control system for operating columns in a natural gas liquids (NGL) plant , comprising:a flow sensor to measure a flow rate of a fractionator column feed stream; an absorber column pressure sensor; and', 'an absorber column pressure control valve;, 'an absorber column pressure controller, comprising a fractionator column pressure sensor; and', 'a fractionator column pressure control valve; and, 'a fractionator column pressure controller, comprising [ the flow sensor;', 'the absorber column pressure sensor; and', 'the fractionator column pressure sensor;, 'a sensor interface to obtain measurements from, the absorber column pressure controller; and', 'the fractionator column pressure controller;, 'a controller interface to communicate set points to, 'a processor configured to execute stored instructions; and', [ the flow sensor;', 'the absorber column pressure sensor; and', 'the fractionator column pressure sensor;, 'read measurements from, 'calculate a set point for the absorber column pressure controller based, at least in part, on a set point for the flow rate; and', 'adjust the set point for the absorber column pressure controller to match the calculated value of the set point., 'a data store, comprising instructions configured to direct the processor to], 'a controller, comprising2. The control system of claim 1 , wherein the data store comprises instructions configured ...

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Номер записи: 73
13-04-2017 дата публикации

METHOD AND ARRANGEMENT FOR PRODUCING LIQUEFIED METHANE GAS (LMG) FROM VARIOUS GAS SOURCES

Номер: US20170102182A1
Автор: JASMIN SIMON, ROY Alain, TREMBLAY Charles
Принадлежит:

The method is carried out for continuously producing a liquefied methane gas (LMG) from a pressurized mixed methane gas feed stream. It is particularly well adapted for use in relatively small LMG distributed production plant, for instance those ranging from 400 to 15,000 MT per year, and/or when the mixed methane gas feed stream has a wide range of nitrogen-content proportions, including nitrogen being substantially absent. The proposed concept can also be very useful in the design of medium-scale and/or large-size plants, including ones where the nitrogen content always remains above a certain threshold. The methods and arrangements proposed herein can mitigate losses of methane gas when venting nitrogen, for instance in the atmosphere. 1. A method of continuously producing a liquefied methane gas (LMG) from a pressurized mixed methane gas feed stream , the mixed methane gas feed stream containing methane and a variable concentration of nitrogen within a range that includes nitrogen being substantially absent from the mixed methane gas feed stream , the method including the simultaneous steps of:(A) passing the mixed methane gas feed stream through a first heat exchanger and then through a second heat exchanger to condense at least a portion of the mixed methane gas feed stream, the first heat exchanger using a first cryogenic refrigerant and the second heat exchanger using a second cryogenic refrigerant;(B) sending the mixed methane gas feed stream coming out of the second heat exchanger though a mid-level inlet of a fractional distillation column;(C) when nitrogen is present in the mixed methane gas feed stream, separating the mixed methane gas feed stream inside the fractional distillation column into a methane-rich liquid fraction and a nitrogen-rich gas fraction;(D) withdrawing the methane-rich liquid fraction accumulating at a bottom of the fractional distillation column through a bottom outlet, the methane-rich liquid fraction constituting the LMG;(E) ...

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Номер записи: 74
19-04-2018 дата публикации

HEAT EXCHANGERS FOR LOW TEMPERATURE CARBON DIOXIDE SEPARATION FROM NATURAL GAS

Номер: US20180106535A1
Автор: Godry Thomas J., Xu Zhanping, Zhou Lubo
Принадлежит:

A reboiler in fluid communication with a fractionator column in an offshore low temperature process removing carbon dioxide from natural gas has a vessel volume. A carbon steel tubing bundle is disposed within the vessel volume. Each tube in the bundle has an outer surface with a porous granular metal layer deposited thereon. The granular metal layer comprises a pore size distribution which promotes bubble nucleation during vaporization of a nearly pure liquid carbon dioxide stream. 1. A reboiler in fluid communication with a fractionator column in an offshore low temperature system removing carbon dioxide from natural gas , the bottom reboiler comprising:a rigid vessel having an outer shell defining a vessel volume, the rigid vessel having an inlet in fluid communication with a fractionator for receiving a liquid stream therefrom and an outlet for returning a vapor to the fractionator; anda carbon steel tubing bundle disposed within the vessel volume each tube in the carbon steel tubing bundle having an outer surface and an inner surface, the outer surface having a granular metal layer deposited thereon, and the inner surface being generally smooth relative thereto, wherein the granular metal layer comprises a pore size distribution adapted to promote and increase bubble nucleation during vaporization of a nearly pure liquid carbon dioxide stream on the outer surfaces of the tubes.2. The reboiler of wherein the granular metal layer is metallurgically bonded to each tube in the carbon steel tubing bundle.3. The reboiler of wherein the shell is produced from a carbon steel.4. The reboiler of wherein a weight of the reboiler is less than 27 claim 1 ,000 kg.5. The reboiler of wherein a weight of the reboiler is less than 22 claim 1 ,000 kg.6. The reboiler of wherein the outer surface having the granular metal layer deposited thereon increases an overall heat transfer coefficient of each tube in the carbon steel tubing bundle by at least 1.3 times that of a bare outer ...

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Номер записи: 75
02-04-2020 дата публикации

NITROGEN RECOVERY APPARATUS AND METHOD OF RECOVERING NITROGEN

Номер: US20200103166A1
Автор: BAUER Heinz, KOPPL Lisa
Принадлежит: LINDE AKTIENGESELLSCHAFT

A nitrogen recovery apparatus for recovering nitrogen from natural gas comprises a separator having a liquid fraction port and a vapour fraction port in fluid communication with a split flow arrangement, the split flow arrangement having a sub-cooled fluid path and an expanded fluid path. A fractionating column has a reflux inlet port in fluid communication with the subcooled fluid path above a middle feed port thereof, the middle feed port being in fluid communication with the expanded fluid path. A bottom feed port of the fractionating column is in fluid communication with the liquid fraction port of the separator. A side reboiler circuit and a reboiler circuit are operably coupled to the fractionating column below the bottom feed port. A bottom hydrocarbon product stream path is in fluid communication with a bottom hydrocarbon port of the fractionating column. 1100100. A nitrogen recovery apparatus () for recovering nitrogen from natural gas , the apparatus () comprising:{'b': 110', '112', '112', '118', '120, 'a separator () having a liquid fraction port and a vapour fraction port in fluid communication with a split flow arrangement (), the split flow arrangement () having a sub-cooled fluid path () and an expanded fluid path ();'}{'b': 116', '124', '118', '130', '130', '120, 'a fractionating column () having a reflux inlet port () in fluid communication with the subcooled fluid path () above a middle feed port () thereof, the middle feed port () being in fluid communication with the expanded fluid path ();'}{'b': 114', '116', '110, 'a bottom feed port () of the fractionating column () in fluid communication with the liquid fraction port of the separator ();'}{'b': 132', '116', '114, 'a side reboiler circuit () operably coupled to the fractionating column () below the bottom feed port ();'}{'b': 140', '116', '132, 'a reboiler circuit () operably coupled to the fractionating column () below the side boiler circuit (); and'}{'b': 160', '162', '116, 'a bottom ...

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Номер записи: 76
04-05-2017 дата публикации

PROCESS AND APPARATUS FOR SWEETENING AND LIQUEFYING A GAS STREAM

Номер: US20170122659A1
Автор: GNANENDRAN Nimalan, WILKES Martin
Принадлежит:

A process and apparatus for liquefying a gas stream comprising hydrocarbons and sour species is provided in which the sour species are removed in liquefied form as the sweetened gas stream is progressively cooled to liquefaction temperatures. The process involves cooling the gas stream in a manner to produce a cooled gas stream comprising gaseous hydrocarbons and residual sour species. The cooled gas stream is then treated with a cold solvent to deplete the cooled gas stream of residual sour species. The resulting cooled sweetened gas stream is then further cooled to produce liquid hydrocarbons. 1. A process for liquefying a gas stream comprising hydrocarbons and sour species , the process comprising the steps of:a) cooling the gas stream by heat exchange with a first refrigerant stream to a temperature marginally greater than at which solidification of the sour species occurs;b) further cooling the gas stream to a first temperature between about −80° C. to −95° C. at a pressure between about 15 to 25 bar by expanding the gas stream as it is introduced into a vessel to produce a mixture of solid and/or liquid sour species and a cooled gas stream comprising gaseous hydrocarbons and residual sour species;c) separating the solid and/or liquid sour species from the cooled gas stream in the vessel;d) contacting the cooled gas stream with a solvent under temperature conditions close to or at the first temperature to deplete the cooled gas stream of residual sour species, thereby producing a cooled sweetened gas stream; ande) cooling the cooled sweetened gas stream to a second temperature below the methane boiling point by heat exchange with a second refrigerant stream to produce liquid hydrocarbons.2. The process according to claim 1 , wherein the first temperature is at or just below the temperature at which the sour species solidifies and/or condenses.3. The process according to claim 1 , wherein the first temperature is a temperature at which freezable hydrocarbon ...

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Номер записи: 77
25-04-2019 дата публикации

PHASE IMPLEMENTATION OF NATURAL GAS LIQUID RECOVERY PLANTS

Номер: US20190120550A1
Автор: Mak John
Принадлежит:

Embodiments relate generally to systems and methods for operating a natural gas liquids plant in ethane rejection and in ethane recovery. A natural gas liquid plant may comprise an absorber configured to produce an ethane rich bottom stream and an ethane depleted vapor stream; a stripper fluidly coupled to the absorber configured to, during ethane rejection, fractionate the ethane rich bottom stream from the absorber into an ethane overhead product and a propane plus hydrocarbons product, and configured to, during ethane recovery, fractionate the ethane rich bottom stream into an ethane plus NGL stream and an overhead vapor stream; and an exchanger configured to, during ethane recovery, counter-currently contact the ethane rich bottom stream from the absorber with the ethane depleted vapor stream from the absorber, thereby heating the vapor stream and chilling the ethane rich bottom stream before the ethane rich bottom stream is fed to the stripper. 1. A natural gas liquid plant configured to operate in either ethane rejection or ethane recovery , the plant comprising:an absorber configured to produce an ethane rich bottom stream and an ethane depleted vapor stream;a stripper fluidly coupled to the absorber configured to, during ethane rejection, fractionate the ethane rich bottom stream from the absorber into an ethane overhead product and a propane plus hydrocarbons product, and configured to, during ethane recovery, fractionate the ethane rich bottom stream into an ethane plus NGL stream and an overhead vapor stream; andan expander configured to, during ethane recovery, expand a vapor portion of a feed gas to the plant, and feed the expanded stream to the absorber.2. The plant of claim 1 , further comprising an exchanger configured to claim 1 , during ethane recovery claim 1 , counter-currently contact the ethane rich bottom stream from the absorber with the ethane depleted vapor stream from the absorber claim 1 , thereby heating the vapor stream and chilling the ...

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Номер записи: 78
16-04-2020 дата публикации

OVERHEAD RECYCLE PROCESS APPARATUS AND METHOD OF OVERHEAD RECYCLE PROCESSING OF HYDROCARBONS

Номер: US20200116427A1
Автор: BAUER Heinz, BUB Andreas, KOPPL Lisa
Принадлежит: LINDE AKTIENGESELLSCHAFT

An overhead recycle process apparatus () comprises a heat exchange arrangement () and a separator () in fluid communication with an absorber () and a de-ethaniser (), the absorber () having a reflux inlet port (). An ethane rectifier () in fluid communication with the de-ethaniser () is also provided, the de-ethaniser () being arranged to provide cooling by heat exchange to an overhead stream path () of the ethane rectifier (). The ethane rectifier () comprises a reflux drum () having an ethane outlet port () and a vapour phase outlet port () in fluid communication with the reflux inlet port () of the absorber (). 1100. An overhead recycle process apparatus () comprising:{'b': 116', '118', '120', '146', '150', '198, 'a heat exchange arrangement (, , , , , );'}{'b': 110', '104', '106', '104', '164, 'a separator () in fluid communication with an absorber () and a de-ethaniser (), the absorber () having a reflux inlet port (); and'}{'b': 170', '106', '106', '194', '170, 'an ethane rectifier () in fluid communication with the de-ethaniser (), the de-ethaniser () being arranged to provide cooling by heat exchange to an overhead stream path () of the ethane rectifier (); and'}{'b': 170', '182', '184', '185', '164', '104, 'the ethane rectifier () comprises a reflux drum () having an ethane outlet port () and a vapour outlet port () in fluid communication with the reflux inlet port () of the absorber ().'}2106197. An apparatus as claimed in claim 1 , wherein the de-ethaniser () comprises a bottom product outlet port () arranged to provide hydrocarbon fractions having a molecular weight heavier than a molecular weight of ethane.3. An apparatus as claimed in claim 1 , further comprising:{'b': 172', '174', '176', '178', '180, 'a side stream circuit (, , , , ); wherein'}{'b': 106', '172', '174', '174', '172', '106, 'the de-ethaniser () comprises a side stream inlet port () and a side stream outlet port (), the side stream outlet port () being disposed above the side stream ...

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Номер записи: 79
27-05-2021 дата публикации

METHODS AND SYSTEMS FOR REMOVING NITROGEN FROM NATURAL GAS

Номер: US20210156613A1
Автор: Bigger Kathryn
Принадлежит:

Methods and systems for producing a product natural gas employing a natural gas liquids (NGL) recovery unit followed by removing nitrogen in a nitrogen rejection unit (NRU) operatively connected with the NGL recovery unit by a pressure management sub-system (PMSS). In one embodiment, the PMSS includes a first conduit fluidly connecting the top of a demethanizer column (or an existing conduit connected to the top of the demethanizer) to a separator, a second conduit fluidly connecting the separator to a pump, the pump connected to a distillation column in the NRU by a third conduit, in another embodiment, the PMSS includes a first conduit fluidly connecting an NGL expander to a separator, allowing natural gas vapors and nitrogen to be fed to the NRU column through a second conduit. Alternatively, the PMSS allows mixture from the NGL recovery unit expander to be fed directly via the first conduit to the NRU distillation column. 1. A system comprising:(a) a natural gas liquids (NGL) recovery unit;(b) a nitrogen rejection unit (NRU); and (i) a demethanizer column overhead to one or more heat exchangers and then to a separator,', '(ii) the separator to a pump, the pump having a pump outlet;', '(iii) the pump outlet with a lower section of an NRU distillation column;', '(iv) the NRU distillation column bottoms to an expansion valve;', '(v) the expansion valve with the one or more heat exchangers;', '(vi) the separator overhead to a point of the fifth conduit downstream of the expansion valve and upstream of the one or more heat exchangers; and', '(vii) the point of the fifth conduit to the one or more heat exchangers and then to an NGL recovery unit heat exchanger network., '(c) a pressure management sub-system (PMSS) operatively and fluidly connecting the NGL recovery unit and the NRU, the PMSS comprising a set of conduits, individual members of the set of conduits fluidly connecting2. The system of wherein the separator and the pump are configured so that the ...

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Номер записи: 80
31-07-2014 дата публикации

Apparatus and Integrated Process for Separating a Mixture of Carbon Dioxide and at Least One Other Gas and for Separating Air by Cryogenic Distillation

Номер: US20140208798A1
Автор: Cognard Marie, Darde Arthur, Davidian Benoit, Dubettier-Grenier Richard, Lockwood Frederick, Szamlewski Christophe, Traversac Xavier
Принадлежит: L'Air Liquide Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude

An integrated apparatus for separating a mixture of carbon dioxide and at least one other gas and for separating air by air distillation is provided. The apparatus includes a COseparation unit configured to separate the mixture, an air separation unit configured to separate air by cryogenic distillation, a water cooling tower that operates by direct contact, a line for sending water to the top of the tower, a line for sending at least one portion of the nitrogen-enriched gas stream to a lower level of the tower, a cooled water line for withdrawing cooled water from the tower and means for cooling the air upstream of the air separation unit, the cooled water line being connected to means for cooling the air upstream of the air separation unit and to the inlet and/or to the outlet of the unit for separating the gaseous mixture. 115-. (canceled)16. An apparatus for separating a mixture of carbon dioxide and at least one other gas and for separating air by air distillation , the apparatus comprising:{'sub': '2', 'a COseparation unit configured to separate a gaseous mixture comprising carbon dioxide and at least one other gas in order to produce a carbon dioxide-enriched gas and a carbon dioxide depleted gas;'}an air separation unit (ASU) configured to separate air by cryogenic distillation in order to produce at least one nitrogen-enriched gas stream; and{'sub': '2', 'a water cooling tower that operates by direct contact as well as a line for sending water to the top of the water cooling tower, a line for sending at least one portion of the nitrogen-enriched gas stream to a lower level of the water cooling tower, a cooled water line for withdrawing cooled water from the water cooling tower and means for cooling the air upstream of the air separation unit, the cooled water line being connected to means for cooling the air upstream of the air separation unit and to the inlet and/or to the outlet of the COseparation unit.'}17. The apparatus as claimed in claim 16 , wherein ...

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Номер записи: 81
12-05-2016 дата публикации

REFINING ASSEMBLIES AND REFINING METHODS FOR RICH NATURAL GAS

Номер: US20160131424A1
Автор: Edlund David J.
Принадлежит: Element 1 Corp.

Refining assemblies and methods for refining rich natural gas containing a first methane gas and other hydrocarbons that are heavier than methane gas are disclosed. In some embodiments, the assemblies may include a methane-producing assembly configured to receive at least one liquid-containing feed stream that includes water and rich natural gas and to produce an output stream therefrom by (a) converting at least a substantial portion of the other hydrocarbons of the rich natural gas with the water to a second methane gas, a lesser portion of the water, and other gases, and (b) allowing at least a substantial portion of the first methane gas from the rich natural gas to pass through the methane-producing assembly unconverted. The assemblies may additionally include a purification assembly configured to receive the output stream and to produce a methane-rich stream therefrom having a greater methane concentration than the output stream. 1. A refining assembly for rich natural gas containing a first methane gas and other hydrocarbons that are heavier than methane gas , comprising:a methane-producing assembly configured to receive at least one liquid-containing feed stream that includes water and rich natural gas and to produce an output stream therefrom by (a) converting at least a substantial portion of the other hydrocarbons of the rich natural gas with the water to a second methane gas, a lesser portion of the water, and other gases, and (b) allowing at least a substantial portion of the first methane gas from the rich natural gas to pass through the methane-producing assembly unconverted; anda purification assembly configured to receive the output stream and to produce a methane-rich stream therefrom having a greater methane concentration than the output stream.2. The refining assembly of claim 1 , wherein the methane-producing assembly includes:a vaporizer configured to receive and vaporize at least a portion of the at least one liquid-containing feedstream that ...

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Номер записи: 82
19-05-2016 дата публикации

Heat Exchange Mechanism For Removing Contaminants From A Hydrocarbon Vapor Stream

Номер: US20160138863A1
Автор: Urbanski Nicholas F.
Принадлежит:

A system for melting contaminant-laden solids that have been separated from a hydrocarbon-containing vapor stream in a hydrocarbon distillation tower, comprising at least one plate positioned where the solids form within the hydrocarbon distillation tower, hollow tubing forming an integral part of each of the at least one plate, and a heating medium disposed to flow through the hollow tubing at a higher temperature than a temperature of the solids to at least partially melt the solids. 1. A system for melting contaminant-laden solids that have been separated from a hydrocarbon-containing vapor stream in a hydrocarbon distillation tower , comprising:at least one plate positioned where the solids form within the hydrocarbon distillation tower;hollow tubing forming an integral part of each of the at least one plate; anda heating medium disposed to flow through the hollow tubing at a higher temperature than a temperature of the solids to at least partially melt the solids.2. The heat exchange mechanism of claim 1 , wherein the at least one plate is substantially rectangular in shape.3. The heat exchange mechanism of claim 1 , wherein the at least one plate is conical in shape.4. The heat exchange mechanism of claim 1 , wherein the at least one plate is frusto-conical in shape.5. The heat exchange mechanism of claim 1 , wherein the at least one plate comprises a plurality of plates concentrically arranged claim 1 , with each of the plurality having a different radius of curvature.6. The heat exchange mechanism of claim 1 , wherein the at least one plate is formed in a spiral.7. The heat exchange mechanism of claim 1 , wherein the at least one plate comprises a plurality of interconnected sets of plates.8. The heat exchange mechanism of claim 1 , wherein the at least one plate is disposed to accommodate passage of at least one vapor riser adjacent thereto.9. The heat exchange mechanism of claim 8 , wherein the at least one vapor riser comprises a plurality of vapor risers ...

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Номер записи: 83
19-05-2016 дата публикации

Liquid Collection System

Номер: US20160138864A1
Автор: Edward J. Grave, Nicholas F. Urbanski
Принадлежит: Individual

An apparatus is disclosed for maintaining constant fluid pressure and equalized fluid flow among a plurality of downcomer lines through which liquid from a tower is directed. A substantially annular fluid distribution belt is disposed at the circumference of the tower. The fluid distribution belt collects liquid from the tower. At least two outlets direct liquid from the fluid distribution belt out of the tower and into a corresponding number of downcomer lines disposed external to the tower.

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Номер записи: 84
10-06-2021 дата публикации

CRYOGENIC PROCESS FOR REMOVING NITROGEN FROM A DISCHARGE GAS

Номер: US20210172677A1
Автор: ANDRICH Marine, CHANTANT Nicolas, Terrien Paul
Принадлежит:

A process for producing biomethane by scrubbing a biogas feed stream including introducing a feed gas stream into a pretreatment unit wherein the gas stream is partially separated from a COstream and an oxygen stream, thereby producing a CO-depleted gas stream, which is compressed, thereby producing a pressurized CO-depleted gas stream; separating the pressurized CO-depleted gas stream by cryogenic separation by introducing the pressurized CO-depleted gas stream into a distillation column thereby producing a nitrogen stream and a CH-enriched stream, recovering a pressurized CH-enriched stream by pumping the CH-enriched stream; wherein the separation of the COstream and the oxygen stream from the feed gas stream is performed by a unit comprising at least two separating membrane stages in order that the CO-depleted gas stream comprises between 0.3 mol % and 2 mol % of CO. 18.-. (canceled)10. The process of claim 9 , further comprising scrubbing water from the pressurized CO-depleted gas stream.11. The process of claim 9 , wherein P1 is greater than 50 bar absolute.12. The process of claim 9 , wherein the pressure P2 is greater than 40 bar abs.13. The process of claim 9 , wherein the CO-depleted gas stream undergoes an expansion to a pressure P3 of between 15 bar abs and 40 bar abs prior to being introduced into said distillation column.14. The process of claim 13 , wherein prior to the expansion claim 13 , the CO-depleted gas stream is at least partially condensed in a heat exchanger.15. The process of claim 14 , wherein the CO-depleted gas stream is at least partially condensed in a heat exchanger counter-currentwise relative to the CH-enriched stream and to at least part of the nitrogen stream. This application is a 371 of International Application No. PCT/FR2018/053338, filed Dec. 17, 2018, which claims priority to French Patent Application No. 1762858, filed Dec. 21, 2017, the entire contents of which are incorporated herein by reference.The invention relates to a ...

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Номер записи: 85
11-06-2015 дата публикации

METHOD AND SYSTEM FOR SEPARATING A FEED STREAM WITH A FEED STREAM DISTRIBUTION MECHANISM

Номер: US20150158796A1
Автор: Valencia Jaime A.
Принадлежит:

The present disclosure provides a distillation tower for separating a feed stream. The distillation tower includes a controlled freeze zone section having a controlled freeze zone upper section and a controlled freeze zone lower section below the controlled freeze zone upper section. The controlled freeze zone section includes: (a) a spray assembly in the controlled freeze zone upper section; (b) a melt tray assembly in the controlled freeze zone lower section; (c) a feed stream distribution mechanism between the spray assembly and the melt tray assembly. The feed stream distribution mechanism is constructed and arranged to uniformly distribute the feed stream in the controlled freeze zone section. 1. A distillation tower for separating a feed stream , the distillation tower comprising: (a) a spray assembly in the controlled freeze zone upper section;', '(b) a melt tray assembly in the controlled freeze zone lower section;', '(c) a feed stream distribution mechanism between the spray assembly and the melt tray assembly,, 'a controlled freeze zone section having a controlled freeze zone upper section and a controlled freeze zone lower section below the controlled freeze zone upper section, wherein the controlled freeze zone section is constructed and arranged to form a solid from a feed stream and the controlled freeze zone section compriseswherein the feed stream distribution mechanism is constructed and arranged to uniformly distribute at least a portion of the feed stream in the controlled freeze zone section.2. The distillation tower of claim 1 , wherein the feed stream distribution mechanism is separate and distinct from the spray assembly and the melt tray assembly.3. The distillation tower of claim 1 , wherein the feed stream distribution mechanism comprises a pipe header having orifices that are closer to the melt tray assembly than the spray assembly.4. The distillation tower of claim 3 , wherein the orifices are oriented towards a controlled freeze zone ...

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Номер записи: 86
31-05-2018 дата публикации

PROCESSES FOR PRODUCING A NATURAL GAS STREAM

Номер: US20180149425A1
Автор: Oneal Derrick, Oneal Timothy, Xu Qing
Принадлежит:

Processes for separating a natural gas stream from a liquid hydrocarbon stream. After being cooled, a feed stream may be separated in a first separation zone, into a gaseous stream and a liquid stream. A portion of each stream may be passed to a heat transfer zone to sub cool and then passed to a second separation zone having a distillation or fractionation column. An intermediate separation zone may be used to flash a gaseous stream from the sub-cooled liquid stream. The fractionation column may be operated to include ethane in either a residue gas stream rich in methane, or in the liquid hydrocarbon stream. 1. A process for separating a stream comprising hydrocarbons into at least two streams , the process comprising:cooling a hydrocarbon stream comprising mostly methane to provide a chilled hydrocarbon stream;separating the chilled hydrocarbon stream in a first separation zone into a gaseous stream and a liquid stream;separating a first portion of the liquid stream in a second separation zone into a residue gas stream and a liquid hydrocarbon stream;cooling a second portion of the liquid stream in a heat transfer zone to provide a cooled liquid stream;separating the cooled liquid stream in the second separation zone; and,separating one or more streams comprising the gaseous stream in the second separation zone.2. The process of wherein the second separation zone has an operating pressure at least 689 kPa less than an operating pressure of the first separation zone.3. The process of further comprising:separating a flashed gaseous stream from the cooled liquid stream in an intermediate separation zone; and,separating the flashed gaseous stream in the second separation zone.4. The process of wherein the intermediate separation zone has an operating pressure at least 1 claim 3 ,724 kPa psi less than an operating pressure of the first separation zone.5. The process of wherein the second separation zone has an operating pressure at least 2 claim 4 ,758 kPa lower than ...

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Номер записи: 87
07-05-2020 дата публикации

Carbon Dioxide Recycle Stream Processing in an Enhanced Oil Recovery Process

Номер: US20200141638A1
Автор: Prim Eric
Принадлежит:

A method for recovering natural gas liquids from a recycle stream having natural gas liquids includes receiving a carbon dioxide recycle stream that comprises carbon dioxide, natural gas, and the natural gas liquids. The carbon dioxide recycle stream is separated into a purified carbon dioxide recycle stream and a natural gas liquids stream. The purified carbon dioxide recycle stream comprises the carbon dioxide and the natural gas, and the natural gas liquids stream comprises the natural gas liquids. In another embodiment, a system comprises piping and a separator. The piping is configured to receive a recycle stream, and the separator is coupled to the piping and is configured to separate the recycle stream into a purified recycle stream and a natural gas liquids stream. 1. A set of process equipment for use in an enhanced oil recovery (EOR) process , the set of process equipment comprising:{'sub': 1', '8, 'a heat exchanger configured to receive a carbon dioxide recycle stream and cool the carbon dioxide recycle stream to produce a cooled carbon dioxide recycle stream, wherein the cooled carbon dioxide recycle stream comprises carbon dioxide, C-Chydrocarbons, and is substantially free of water;'}a multi-stage column configured to receive the cooled carbon dioxide recycle stream and produce a top effluent stream and a bottom effluent stream;{'sub': 1', '4, 'a single stage separator configured to receive the top effluent stream and produce a vapor stream and a liquid stream, wherein the vapor stream is transferred to the heat exchanger to produce a heated vapor stream, wherein the heated vapor stream comprises carbon dioxide and C-Chydrocarbons; and'}{'sub': 3', '8, 'an expander configured to receive the bottom effluent stream and produce an expanded bottom effluent stream, wherein the expanded bottom effluent stream comprises C-Chydrocarbons.'}2. The set of process equipment of claim 1 , further comprising a molecular sieve dehydrator configured to receive a feed ...

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Номер записи: 88
07-05-2020 дата публикации

METHODS AND CONFIGURATION FOR RETROFITTING NGL PLANT FOR HIGH ETHANE RECOVERY

Номер: US20200141639A1
Автор: DEVONE Sabrina, Graham Curt, Mak John, SHIH James
Принадлежит: FLUOR TECHNOLOGIES CORPORATION

A natural gas liquid plant is retrofitted with a bolt-on unit that includes an absorber that is coupled to an existing demethanizer by refrigeration produced at least in part by compression and expansion of the residue gas, wherein ethane recovery can be increased to at least 99% and propane recovery is at least 99%, and where a lower ethane recovery of 96% is required, the bolt-on unit does not require the absorber, which could be optimum solution for revamping an existing facility. Contemplated configurations are especially advantageous to be used as bolt-on upgrades to existing plants. 1. A natural gas liquid plant bolt-on unit , comprising:an absorber configured to condense an ethane content from an overhead gas stream from a demethanizer using a cold lean residue gas to produce a liquid portion and a vapor portion, wherein the demethanizer is configured to receive the liquid portion as a first reflux;a reflux exchanger and a subcooler, wherein the reflux exchanger and the subcooler are configured to receive the vapor portion and use the vapor portion to provide cooling within the reflux exchanger and the subcooler; anda flow control valve configured to direct between about 70% to 90% of the vapor portion to: 1) reflux cooling, and 2) a second reflux of the demethanizer in the subcooler.2. The natural gas liquid plant bolt-on unit of claim 1 , wherein the overhead gas is at a pressure between about 250 psig to about 350 psig.3. The natural gas liquid plant bolt-on unit of claim 1 , wherein the absorber and the reflux exchanger are fluidly coupled to a residue gas compressor and the demethanizer claim 1 , and wherein the natural gas liquid plant is configured to provide at least a 99% ethane recovery.4. The natural gas liquid plant bolt-on unit of claim 1 , further comprising a reduction device comprising a Joule-Thompson valve claim 1 , wherein the reduction device is configured to receive the liquid portion and expand the liquid portion prior to the liquid ...

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Номер записи: 89
17-06-2021 дата публикации

System and Method for Separating Methane and Nitrogen with Reduced Horsepower Demands

Номер: US20210180863A1
Автор: Butts Rayburn C.
Принадлежит:

A system and method for removing nitrogen from natural gas using two fractionating columns, that may be stacked, and a plurality of separators and heat exchangers, with horsepower requirements that are 50-80% of requirements for prior art systems. The fractionating columns operate at different pressures. A feed stream is separated with a vapor portion feeding the first column to produce a first column bottoms stream that is split into multiple portions at different pressures and first column overhead stream that is cooled and separated into vapor and liquid portions to control subcooling of the vapor portion prior to feeding the second column. Heat exchange between first column and second column streams provides first column reflux and reboil heat for a second column ascending vapor stream. Three sales gas streams are produced, each at a different pressure. 1. A system for removing nitrogen and for producing a methane product stream from a feed stream comprising nitrogen , methane , and other components , the system comprising:a first separator wherein the feed stream is separated into a first separator overhead stream and a first separator bottoms stream;a first splitter for splitting the first separator overhead stream into a first portion and a second portion;a first fractionating column wherein the first and second portions of the first separator overhead stream are separated into a first column overhead stream and a first column bottoms stream;a second splitter for splitting the first column bottoms stream into four portions;a second fractionating column wherein the first column overhead stream is separated into a second column overhead stream and a second column bottoms stream;a second separator wherein the second column bottoms stream and a fourth portion of the first column bottoms stream are separated into a second separator overhead stream and a second separator bottoms stream;a first mixer to mix the second separator bottoms stream and a third portion of ...

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Номер записи: 90
17-06-2021 дата публикации

System and Method for Separating Methane and Nitrogen with Reduced Horsepower Demands

Номер: US20210180864A1
Автор: Butts Rayburn C.
Принадлежит:

A system and method for removing nitrogen from natural gas using two fractionating columns, that may be stacked, and a plurality of separators and heat exchangers, with horsepower requirements that are 50-80% of requirements for prior art systems. The fractionating columns operate at different pressures. A feed stream is separated with a vapor portion feeding the first column to produce a first column bottoms stream that is split into multiple portions at different pressures and first column overhead stream that is split or separated into two portions at least one of which is subcooled prior to feeding the top of the second column. Optional heat exchange between first column and second column streams provides first column reflux and reboil heat for a second column ascending vapor stream. Three sales gas streams are produced, each at a different pressure. 1. A system for removing nitrogen and for producing a methane product stream from a feed stream comprising nitrogen , methane , and other components , the system comprising:a first separator wherein the feed stream is separated into a first separator overhead stream and a first separator bottoms stream;a first splitter for splitting the first separator overhead stream into a first portion and a second portion;a first fractionating column wherein the first and second portions of the first separator overhead stream are separated into a first column overhead stream and a first column bottoms stream;a second splitter for splitting the first column bottoms stream into three portions;a second fractionating column wherein the first column overhead stream is separated into a second column overhead stream and a second column bottoms stream;a second separator wherein the second column bottoms stream is separated into a second separator overhead stream and a second separator bottoms stream;a first mixer to mix the second separator bottoms stream and a third portion of the first column bottoms stream to form a first mixed ...

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Номер записи: 91
11-06-2015 дата публикации

Method and system of dehydrating a feed stream processed in a distillation tower

Номер: US20150159940A1
Автор: Jaime A. Valencia, Paul Scott Northrop
Принадлежит: Individual

The present disclosure provides a method of dehydrating a feed stream processed in a distillation tower. The method may include (a) introducing a feed stream comprising a first contaminant stream into a distillation tower; (b) forming a solid from the feed stream in a controlled freeze zone section of the distillation tower; (c) feeding a second contaminant stream into the feed stream outside the distillation tower; and (d) removing water from the feed stream with a second contaminant stream by feeding the second contaminant stream.

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Номер записи: 92
11-06-2015 дата публикации

METHOD AND SYSTEM FOR PREVENTING ACCUMULATION OF SOLIDS IN A DISTILLATION TOWER

Номер: US20150159941A1
Автор: Northrop Paul Scott, Valencia Jaime A.
Принадлежит:

The present disclosure provides a method for preventing accumulation of solids in a distillation tower. The method includes introducing a feed stream into a controlled freeze zone section of a distillation tower; forming solids in the controlled freeze zone section from the feed stream; discontinuously injecting a first freeze-inhibitor solution into the controlled freeze zone section toward a location in the controlled freeze zone section that accumulates the solids; and destabilizing accumulation of the solids from the location with the first freeze-inhibitor solution. 1. A method for preventing accumulation of solids in a distillation tower , the method comprising:introducing a feed stream into a controlled freeze zone section of a distillation tower;forming solids in the controlled freeze zone section from the feed stream;discontinuously injecting a first freeze-inhibitor solution into the controlled freeze zone section toward a location in the controlled freeze zone section that accumulates the solids; anddestabilizing accumulation of the solids from the location with the first freeze-inhibitor solution.2. The method of claim 1 , wherein the first freeze-inhibitor solution comprises any carbon dioxide solubilizing solvent that remains unfrozen in the controlled freeze zone section.3. The method of claim 1 , wherein the first freeze-inhibitor solution comprises at least one of light hydrocarbons and light alcohols.4. The method of claim 1 , wherein the first freeze-inhibitor solution comprises at least one of ethane claim 1 , methanol claim 1 , propane and butane.5. The method of claim 1 , wherein discontinuously injecting the first freeze-inhibitor solution comprises releasing the first freeze-inhibitor solution from the location.6. The method of claim 1 , wherein the location comprises at least one of a spray assembly of the controlled freeze zone section and a first freeze-inhibitor injection piping arrangement adjacent to a controlled freeze zone wall of the ...

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Номер записи: 93
11-06-2015 дата публикации

METHOD AND DEVICE FOR SEPARATING HYDROCARBONS AND CONTAMINANTS WITH A SURFACE TREATMENT MECHANISM

Номер: US20150159942A1
Автор: Smith Ransdall K., Valencia Jaime A.
Принадлежит:

The disclosure includes a method for separating a feed stream in a distillation tower may comprise maintaining a controlled freeze zone section in the distillation tower that forms solids from a feed stream, wherein the controlled freeze zone section includes one or more internally disposed elements and a controlled freeze zone wall having an internal wall surface inside of the distillation tower, modifying at least one of the internally disposed elements, the internal wall surface, or both with a treatment mechanism that includes at least one of (a) removing portions of the internal wall surface and (b) applying a coating surface, introducing the feed stream into the controlled freeze zone section, forming the solids from the feed stream in the controlled freeze zone section, and at least one of preventing and destabilizing adhesion of the solids to the internal wall surface with the treatment mechanism. 1. A method for separating a feed stream in a distillation tower comprising:maintaining a controlled freeze zone section in the distillation tower that forms solids from a feed stream, wherein the controlled freeze zone section includes one or more internally disposed elements and a controlled freeze zone wall having an internal wall surface inside of the distillation tower;modifying at least one of the internally disposed elements, the internal wall surface, or both with a treatment mechanism that includes at least one of (a) removing portions of the internal wall surface and (b) applying a coating surface;introducing the feed stream into the controlled freeze zone section;forming the solids from the feed stream in the controlled freeze zone section; andat least one of preventing and destabilizing adhesion of the solids to the internal wall surface with the treatment mechanism.2. The method of claim 1 , wherein removing portions of the internal wall surface comprises one of mechanically and electrochemically removing material from the internal wall surface.3. The ...

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Номер записи: 94
11-06-2015 дата публикации

METHOD AND DEVICE FOR SEPARATING HYDROCARBONS AND CONTAMINANTS WITH A SPRAY ASSEMBLY

Номер: US20150159943A1
Автор: Maher David W., Valencia Jaime A.
Принадлежит:

A method for separating a feed stream in a distillation tower comprising maintaining a controlled freeze zone (CFZ) section in the distillation tower, receiving a freezing zone liquid stream in a spray nozzle assembly in the CFZ section, wherein the spray nozzle assembly comprises a plurality of outer spray nozzles on an outer periphery of the spray nozzle assembly and at least one inner spray nozzle interior to the outer spray nozzles, wherein each outer spray nozzle is configured to spray the freezing zone liquid stream along a central spray axis, and wherein the central spray axis of at least one of the outer spray nozzles is not parallel to a CFZ wall, and spraying the freezing zone liquid stream through the spray nozzle assembly into the CFZ section to keep a temperature and pressure at which the solid and the hydrocarbon-enriched vapor stream form. 1. A method for separating a feed stream in a distillation tower comprising:maintaining a controlled freeze zone section in the distillation tower;receiving a freezing zone liquid stream in a spray nozzle assembly in the controlled freeze zone section, wherein the spray nozzle assembly comprises a plurality of outer spray nozzles on an outer periphery of the spray nozzle assembly and at least one inner spray nozzle interior to the plurality of outer spray nozzles, wherein each outer spray nozzle is configured to spray the freezing zone liquid stream along a central spray axis, and wherein the central spray axis of at least one of the plurality of outer spray nozzles is not parallel to a controlled freeze zone wall; andspraying the freezing zone liquid stream through the spray nozzle assembly into the controlled freeze zone section to keep the controlled freeze zone section at a temperature and pressure at which the solid and the hydrocarbon-enriched vapor stream form.2. The method of claim 1 , wherein an angle of the central spray axis of at least one of the plurality of outer spray nozzles is achieved by angling ...

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Номер записи: 95
11-06-2015 дата публикации

METHOD AND DEVICE FOR SEPARATING A FEED STREAM USING RADIATION DETECTORS

Номер: US20150159944A1
Автор: Cullinane J. Tim, Denton Robert D., Grave Edward J., Valencia Jaime A.
Принадлежит:

The present disclosure provides a method for separating a feed stream in a distillation tower. The method may include forming solids in a controlled freeze zone section of the distillation tower; emitting radiation from a first radiation source in the controlled freeze zone section while the controlled freeze zone section forms no solids; detecting radiation emitted by the first radiation source as a first radiation level; detecting radiation emitted by the first radiation source as a second radiation level after detecting the first radiation level; and determining whether the solids adhered to at least one of on and around a first mechanical component included in the controlled freeze zone section based on the first radiation level and the second radiation level. 1. A method for separating a feed stream in a distillation tower comprising:forming solids in a controlled freeze zone section of the distillation tower;emitting radiation from a first radiation source in the controlled freeze zone section while the controlled freeze zone section forms no solids;detecting radiation emitted by the first radiation source as a first radiation level;detecting radiation emitted by the first radiation source as a second radiation level after detecting the first radiation level; anddetermining whether the solids adhered to at least one of on and around a first mechanical component included in the controlled freeze zone section based on the first radiation level and the second radiation level.2. The method of claim 1 , wherein the first mechanical component comprises one of: (a) a wall of the controlled freeze zone section and (b) a channel of the controlled freeze zone section.3. The method of claim 1 , wherein determining whether the solids adhered comprises:using the first radiation level to generate a baseline radiation level in the controlled freeze zone section and comparing the second radiation level to a radiation deviation range, the radiation deviation range dependent on ...

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Номер записи: 96
28-08-2014 дата публикации

METHOD FOR PRODUCING A FLOW WHICH IS RICH IN METHANE AND A CUT WHICH IS RICH IN C2+ HYDROCARBONS FROM A FLOW OF FEED NATURAL GAS AND AN ASSOCIATED INSTALLATION

Номер: US20140238075A1
Автор: Barthe Loic, PARADOWSKI Henri, Thiebault Sandra
Принадлежит:

This method comprises cooling the feed natural gas in a first heat exchanger and introducing the cooled, feed natural gas into a first separation flask. 2. The method according to claim 1 , wherein the second recirculation flow is introduced into a flow downstream of the first heat exchanger and upstream of the first expansion turbine in order to form the dynamic expansion flow.3. The method according to claim 2 , wherein the second recirculation flow is mixed with the turbine supply flow from the first separation flask in order to form the dynamic expansion flow claim 2 , the dynamic expansion turbine receiving the dynamic expansion flow being formed by the first expansion turbine.4. Method according to claim 2 , wherein the second recirculation flow is mixed with the cooled natural gas flow before it is introduced into the first separation flask claim 2 , the dynamic expansion flow being formed by the turbine supply flow from the first separation flask.5. The method according to claim 2 , wherein the second recirculation flow is removed from the first recirculation flow.6. Method according to claim 2 , wherein it comprises the following steps of:removing a removal flow from the head flow rich in methane, before it is introduced into the first compressor and the second compressor;compressing the removal flow in a third compressor;forming the second recirculation flow from the compressed removal flow from the third compressor, after cooling.7. Method according to claim 6 , wherein it comprises passing the removal flow into a third heat exchanger and into a fourth heat exchanger before it is introduced into the third compressor claim 6 , then passing the compressed removal flow into the fourth heat exchanger claim 6 , then into the third heat exchanger in order to supply the head of the separation column claim 6 , the second recirculation flow being removed from the cooled claim 6 , compressed removal flow claim 6 , between the fourth heat exchanger and the third ...

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Номер записи: 97
23-05-2019 дата публикации

CONFIGURATIONS AND METHODS FOR NGL RECOVERY FOR HIGH NITROGEN CONTENT FEED GASES

Номер: US20190154333A1
Автор: Mak John
Принадлежит: FLUOR TECHNOLOGIES CORPORATION

A low cost and efficient design is used to convert a propane recovery process based on low nitrogen content feed gas to an ethane recovery process based on a high nitrogen feed gas while achieving over 95 mole % ethane recovery while maintaining a 99% propane recovery, and achieved without additional equipment. 1. A NGL plant configured to convert from a propane recovery configuration to an ethane recovery configuration , the NGL plant comprising:an absorber; anda fractionator,wherein the absorber is configured to produce an absorber overhead product and an absorber bottom product, wherein the fractionator is configured to produce a fractionator overhead product and a fractionator bottom product,wherein the absorber is configured to receive a vapor portion of the fractionator overhead product as a top reflux in the propane recovery configuration and to receive a stream comprising a first portion of a feed gas and a first portion of the absorber overhead product as the top reflux in the ethane recovery configuration;wherein the fractionator overhead product is configured to flow to a chiller in the propane recovery configuration and to a bottom of the absorber in the ethane recovery configuration; andwherein the absorber bottom product is configured to flow to a mid-section of the fractionator in the propane recovery configuration and to a top tray of the fractionator in the ethane recovery configuration.2. The NGL plant of claim 1 , wherein the fractionator overhead product is further configured to flow to a separator after flowing to the chiller in the propane recovery configuration.3. The NGL plant of claim 2 , wherein the separator is configured to separate the fractionator overhead into the vapor portion and a liquid portion in the propane recovery configuration.4. The NGL plant of claim 3 , wherein the fractionator is configured to receive a first portion of the liquid portion of the fractionator overhead product at the top tray of the fractionator in the ...

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Номер записи: 98
08-06-2017 дата публикации

SYSTEM AND METHOD FOR LIQUEFACTION OF NATURAL GAS

Номер: US20170160008A9
Автор: Kikkawa Yoshitsugi, Sakai Koichiro
Принадлежит:

By using the power generated by an expander by an expansion of material gas, the outlet pressure of a compressor is increased, and a requirement on the cooling capacity of a cooler is reduced. The liquefaction system () for natural gas comprises a first expander () for generating power by using natural gas under pressure as material gas; a first cooling unit () for cooling the material gas depressurized by expansion in the first expander; a distillation unit () for reducing or eliminating a heavy component in the material gas by distilling the material gas cooled by the first cooling unit; a first compressor () for compressing the material gas from which the heavy component was reduced or eliminated by the distillation unit by using power generated in the first expander; and a liquefaction unit () for liquefying the material gas compressed by the first compressor by exchanging heat with a refrigerant. 1. A system for the liquefaction of natural gas that cools the natural gas to produce liquefied natural gas , comprising:a first expander for generating power by expanding natural gas under pressure as material gas;a first cooling unit for cooling the material gas depressurized by expansion in the first expander;a distillation unit for reducing or eliminating a heavy component in the material gas by distilling the material gas cooled by the first cooling unit;a first compressor for compressing the material gas from which the heavy component was reduced or eliminated by the distillation unit by using the power generated in the first expander; anda liquefaction unit for liquefying the material gas compressed by the first compressor by exchanging heat with a refrigerant.2. The system for the liquefaction of natural gas according to claim 1 , further comprising a second cooling unit placed between the first compressor and the liquefaction unit to cool the material gas compressed by the first compressor.3. The system for the liquefaction of natural gas according to claim 1 ...

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Номер записи: 99
14-05-2020 дата публикации

NATURAL GAS LIQUID FRACTIONATION PLANT WASTE HEAT CONVERSION TO SIMULTANEOUS POWER AND COOLING CAPACITIES USING MODIFIED GOSWAMI SYSTEM

Номер: US20200149827A1
Автор: Kamel Akram Hamed Mohamed, Noureldin Mahmoud Bahy Mahmoud
Принадлежит: Saudi Arabian Oil Company

Certain aspects of natural gas liquid fractionation plant waste heat conversion to simultaneous power and cooling capacities using modified Goswami system can be implemented as a system. The system includes a waste heat recovery heat exchanger configured to heat a buffer fluid stream by exchange with a heat source in a natural gas liquid fractionation plant. The system includes a modified Goswami cycle energy conversion system including one or more first energy conversion system heat exchangers configured to heat a working fluid by exchange with the heated buffer fluid stream, a separator configured to receive the heated working fluid and to output a vapor stream of the working fluid and the liquid stream of the working fluid, a turbine and a generator, wherein the turbine and generator are configured to generate power by expansion of a first portion of the vapor stream of the working fluid, and a cooling subsystem including a cooling element configured to cool a process fluid stream from the natural gas liquid fractionation plant by exchange with a condensed second portion of the vapor stream of the working fluid. 1. (canceled)2. A system comprising:a waste heat recovery heat exchanger configured to heat a buffer fluid stream with heat from a heat source in a natural gas liquid fractionation plant; and an energy conversion system heat exchanger configured to heat a working fluid with heat from the heated buffer fluid stream;', 'a separator configured to separate the heated working fluid in a vapor stream of the working fluid and a liquid stream of the working fluid;', 'a turbine and a generator, wherein the turbine and generator are configured to generate power by expansion of a first portion of the vapor stream of the working fluid; and', 'a cooling element configured to cool a process fluid stream from the natural gas liquid fractionation plant with heat from a condensed second portion of the vapor stream of the working fluid., 'a modified Goswami cycle energy ...

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Номер записи: 100