Настройки

Укажите год
-

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

Подробнее
-

Мониторинг СМИ

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

Подробнее

Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Укажите год
Укажите год
Применить Всего найдено 4811. Отображено 100.
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.

Подробнее
Номер записи: 1
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.

Подробнее
Номер записи: 2
27-09-2012 дата публикации

Method and device for treating a carbon-dioxide-containing gas flow, wherein the energy of the vent gas (work and cold due to expansion) is used

Номер: US20120240619A1
Автор: Annett Kutzschbach, Roland Ritter
Принадлежит: Linde KCA Dresden GmbH

The invention relates to a method and a device for treating a carbon-dioxide-containing gas stream, in particular from a large-scale fired plant, e.g. from a power plant. The precompressed gas stream is separated in a carbon dioxide purification stage into a gas substream having an elevated carbon dioxide content (carbon dioxide product stream) and a gas substream having a decreased carbon dioxide content (vent gas stream). The carbon dioxide product stream is fed to further utilization and/or storage. In particular, by injecting the carbon dioxide underground, the emission of gases harmful to the climate can be reduced. For improving the energy efficiency, it is proposed that the vent gas stream is expanded in at least one expansion turbine and both the resultant kinetic energy and the resultant refrigeration are utilized for energy recovery. For utilizing the kinetic energy, the expansion turbine can be coupled to a compressor (booster) which compresses the crude gas stream and/or the carbon dioxide product stream. For utilizing the refrigeration generated in the expansion, the at least partially expanded vent gas stream can be brought into heat exchange with process streams which are to be cooled, e.g. the crude gas stream and/or the carbon dioxide product stream.

Подробнее
Номер записи: 3
23-05-2013 дата публикации

Expander and method for co2 separation

Номер: US20130125580A1
Автор: Douglas Carl Hofer
Принадлежит: General Electric Co

In one aspect an expander for separating carbon dioxide (CO 2 ) from a gas stream is presented. The expander includes (a) a housing; (b) at least one rotating component disposed within the housing; (c) at least one inlet disposed in the housing, wherein the inlet is configured to receive the gas stream;(d) at least one first outlet disposed in the housing, wherein the first outlet is configured to discharge a CO 2 rich stream; and (e) at least one second outlet disposed in the housing, wherein the second outlet is configured to discharge a CO 2 lean stream. The expander is configured to cool the gas stream such that a portion of CO 2 in the gas stream forms one or both of solid CO 2 and liquid CO 2 . The expander is further configured to separate at least a portion of one or both of solid CO 2 and liquid CO 2 from the gas stream to form the CO 2 rich stream and the CO 2 lean stream. System and method for separating carbon dioxide (CO 2 ) from a gas stream are also presented

Подробнее
Номер записи: 4
06-06-2013 дата публикации

Air separation method and apparatus

Номер: US20130139547A1
Автор: Henry Edward Howard, Matthew R. WATT, Thomas J. Bergman, Jr.
Принадлежит: Praxair Technology Inc

A method and apparatus to produce oxygen and nitrogen co-products in which a compressed a compressed and purified air stream is cooled, fully or partially condensed and then rectified in a main distillation column to form a nitrogen-rich vapor column overhead and crude liquid oxygen. A crude liquid oxygen stream is depressurized and then stripped in an auxiliary distillation column with a stripping gas to produce an oxygen-rich liquid. The nitrogen-rich vapor column overhead from the main distillation column is used to form a nitrogen product and the crude liquid oxygen is partially vaporized to produce the stripping gas, a residual oxygen-rich liquid and liquid nitrogen reflux to the main distillation column. The oxygen product is formed from the residual oxygen-rich liquid by either providing the heat exchange duty in condensing the compressed and purified air stream or by condensing nitrogen-rich vapor used in refluxing the main distillation column.

Подробнее
Номер записи: 5
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.

Подробнее
Номер записи: 6
27-06-2013 дата публикации

Power and regasification system for lng

Номер: US20130160486A1
Автор: David Machlev, Nadav Amir
Принадлежит: Ormat Technologies Inc

The present invention provides a power and regasification system based on liquefied natural gas (LNG), comprising a vaporizer by which liquid motive fluid is vaporized, said liquid motive fluid being LNG or a motive fluid liquefied by means of LNG; a turbine for expanding the vaporized motive fluid and producing power; heat exchanger means to which expanded motive fluid vapor is supplied, said heat exchanger means also being supplied with LNG for receiving heat from said expanded fluid vapor, whereby the temperature of the LNG increases as it flows through the heat exchanger means; a conduit through which said motive fluid is supplied from at least the outlet of said heat exchanger to the inlet of said; and a line for transmitting regasified LNG.

Подробнее
Номер записи: 7
05-12-2013 дата публикации

Method and system for milling a fuel for an oxy-fuel combustion burner

Номер: US20130319303A1
Автор: Friedemann Kendel, Gerhard Heinz, Gisbert Wolfgang Kaefer, Hardy Rauchfuss, Hellmuth Brueggemann, Michal Tadeusz Bialkowski, Patrick MOENCKERT, Staffan Jonsson, Thomas Wild, Turgay PEKDEMIR
Принадлежит: Alstom Technology AG

The present disclosure relates to a method of milling a fuel for an oxy-fuel combustion burner, the method includes: separating air into a hot nitrogen gas stream, having a temperature of at least 150° C. and a purity of at least 98 mol-% nitrogen, and an oxygen gas stream; leading at least a part of the nitrogen gas stream to a fuel mill; milling the fuel by means of the fuel mill in a nitrogen rich atmosphere formed by means of the nitrogen gas stream; leading the at least a part of the nitrogen gas stream away from the milled fuel; leading the oxygen gas stream to the oxy-fuel combustion burner; conveying the milled fuel to the oxy-fuel combustion burner; and burning the fuel, by means of the oxy-fuel combustion burner, in an oxygen rich atmosphere formed by means of the oxygen gas stream. The present disclosure further relates to a system for milling a fuel for an oxy-fuel combustion burner as well as to a power plant comprising such a system.

Подробнее
Номер записи: 8
19-12-2013 дата публикации

Natural Gas Liquefaction Process to Extend Lifetime of Gas Wells

Номер: US20130333415A1
Автор: Hans E. Kimmel
Принадлежит: Ebara International Corp

A variable speed liquid LNG expander (X1) and a variable speed two-phase LNG expander (X2) in line, downstream from X1. The rotational speed of both expanders can be controlled and changed independent from each other. The speed of expander X1 and expander X2 is determined in such way that the amount of liquid LNG downstream from the PHS compared to the feed gas supply is maximized and the amount of vapor and boil-off downstream of X2 is minimized.

Подробнее
Номер записи: 9
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.

Подробнее
Номер записи: 10
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.

Подробнее
Номер записи: 11
23-01-2014 дата публикации

System and method for using a chilled fluid to cool an electromechanical machine

Номер: US20140020426A1
Автор: James Michael Fogarty, Rebecca Ann Nold, Richard Anthony Depuy, William Hunter Boardman, IV
Принадлежит: General Electric Co

A system includes an air separation unit configured to generate a chilled fluid. The system also includes an electromechanical machine configured to be cooled via heat exchange with the chilled fluid.

Подробнее
Номер записи: 12
05-01-2017 дата публикации

PURIFYING CRYOGENIC FLUIDS

Номер: US20170003071A1
Автор: Gutelius Patrick N., Parys James R.
Принадлежит:

A cryogenic fluid purification device comprising: a first container defining an interior region; a second container defining an interior region in fluid communication with the interior region of the first container; and a cryogenic fluid in contact with an exterior of the second container. 1. A cryogenic fluid purification device comprising:a first container defining an interior region;a second container defining an interior region in fluid communication with the interior region of the first container; anda cryogenic fluid in contact with an exterior of the second container.2. The device of claim 1 , wherein the second container is sized and configured to be received at least partially in the interior region of the first container.3. The device of claim 2 , comprising a manifold extending from an outlet of the first container to an inlet of the second container.4. The device of claim 3 , the manifold comprising an oxygen rejecting filter.5. The device of claim 3 , the manifold comprising pressure relief6. The device of claim 2 , comprising a pump operable to reduce pressure in the interior region of the first container.7. The device of claim 1 , comprising a filter disposed in a path providing fluid communication between the interior region of the second container and the interior region of the first container.8. The device of claim 1 , wherein the first container comprises a spout configured to engage a port of the second container.9. The device of claim 8 , comprising a third container defining an interior region claim 8 , wherein the second container is sized and configured to be received at least partially in the interior region of the third container. This application claims priority to U.S. Provisional Patent Application No. 62/187,936, filed on Jul. 2, 2015, the entire contents of which is incorporated herein by reference.This disclosure relates to devices and methods for purifying cryogenic fluids.Nitrogen, as an element of great technical importance, can be ...

Подробнее
Номер записи: 13
05-01-2017 дата публикации

Systems And Methods For Using Multiple Cryogenic Hydraulic Turbines

Номер: US20170003072A1
Автор: Griffith Todd S., Holt Christopher G.
Принадлежит:

There is provided a system and method for producing liquefied natural gas (LNG). An exemplary method includes flowing a high-pressure stream of LNG through a first series of liquid turbines. The exemplary method also includes generating electricity by reducing the pressure of the high-pressure stream of LNG to form a low-pressure stream of LNG. The exemplary method additionally includes bypassing any one the liquid turbines that has a failure while continuing to produce electricity from the first series. 1. A method for generating electricity from liquid turbines , comprising:{'sup': 'st', 'flowing a high-pressure liquid stream through a first plurality of n liquid turbines coupled in a first series, wherein, after a first turbine in the series, an inlet of each of the second through the n-1liquid turbines is coupled to an outlet of a proceeding liquid turbine;'}generating electricity from the first series by removing energy from the high-pressure liquid stream to form a low-pressure liquid stream;bypassing any one of the first plurality of liquid turbines that has a failure while continuing to produce electricity with the remaining turbines of the first series; andoperating the first plurality of liquid turbines in the first series that are not bypassed to maintain a pressure and flow rate of the low-pressure liquid stream.2. The method of claim 1 , further comprising:maintaining the total electrical output from the first series as a constant value when a liquid turbine is bypassed.3. The method of claim 1 , further comprising:maintaining the temperature of the low-pressure liquid stream from the first series when a liquid turbine is bypassed.4. The method of claim 1 , further comprising:removing a portion of the high-pressure liquid stream prior to the first series;{'sup': 'st', 'flowing the portion through a second plurality of n liquid turbines coupled in a second series, wherein, after a first turbine in the series, an inlet of each of the second through the n- ...

Подробнее
Номер записи: 14
05-01-2017 дата публикации

METHOD AND APPARATUS FOR SEPARATION AT SUBAMBIENT TEMPERATURE

Номер: US20170003073A1
Автор: Davidian Benoit
Принадлежит: L'Air Liquide, Societe Anonyme opu l'Etude et Exploitation des Procedes Georges Claude

A method for separating a gas mixture at subambient temperature, in which a gas mixture is sent to a heat-insulated chamber, cooled and separated in a column, and placed inside the chamber so as to produce at least two fluids, each of which is enriched with a component from the gas mixture. At least one fluid from the method can be heated inside the chamber or vaporized via heat exchange with at least one heating member including at least one element having magnetocaloric properties and built into a circuit configured to conduct a magnetic flux. The element is alternatingly in thermal contact with a cold source, made up of the fluid to be heated, and a hot source, made up of a source hotter than the fluid to be heated, and variation in the magnetic flux via the magnetocaloric effect generates electrical and/or mechanical energy. 115-. (canceled)16. A process for separating a gas mixture at subambient temperature , wherein the process comprises the steps of:sending a gas mixture to a thermally insulated chamber under conditions effective for cooling and separating the gas mixture within a column that is placed inside the thermally insulated chamber, so as to produce at least two fluids, each of which is enriched with a component of the gas mixture;heating at least one of the two fluids inside the thermally insulated chamber by heat exchange with at least one heating member, wherein the at least one heating member comprises at least one element having magnetocaloric properties and integrated into a circuit configured to conduct a magnetic flux, said at least one element being alternatingly in thermal contact with a cold source made up of the fluid to be heated and a hot source made up of the surrounding environment or another source that is hotter than the fluid to be heated; andgenerating electrical and/or mechanical energy from the variation in the magnetic flux via the magnetocaloric effect,wherein at least one of the two fluids to be heated being at least one part ...

Подробнее
Номер записи: 15
07-01-2016 дата публикации

METHOD AND APPARATUS FOR THE CRYOGENIC SEPARATION OF AIR

Номер: US20160003534A1
Автор: Goloubev Dimitri
Принадлежит:

A method and the apparatus for the cryogenic separation of air in an air separation plant which has a main air compressor, a main heat exchanger and a distillation column system with a high-pressure column and a low-pressure column. All of the feed air is compressed in the main air compressor to a first air pressure which is at least 3 bar higher than the operating pressure of the high-pressure column. A first part of the compressed total air flow, as first air flow at the first air pressure, is cooled and liquefied or pseudo-liquefied in the main heat exchanger, then expanded and introduced into the distillation column system. A second part of the compressed total air flow, as second air flow, is post-compressed in an air post-compressor to a second air pressure and at least part is further compressed in a first turbine-driven post-compressor to a third air pressure. 2. The method according to claim 1 , characterized in that a third part of the compressed total air flow as fifth air flow at the first air pressure is introduced into a second turbine where it is expanded, performing work,', 'the second turbine drives a second turbine-driven post-compressor which is formed by the cold compressor,', 'the fifth air flow, which has been expanded, performing work, is introduced into the distillation column system and in that, 'at least occasionally'}in the first mode of operation the quantity of air which is guided as fifth air flow through the second turbine is less than in the second mode of operation.3. The method according to claim 2 , characterized in that a first quantity of air of the compressed total air flow forms the first air flow and', 'a second quantity of air of the compressed total air flow forms the second air flow, 'in the first mode of operation'}and a third quantity of air of the compressed total air flow, which is greater than the first quantity of air, forms the first air flow and', 'a fourth quantity of air of the compressed total air flow, which is ...

Подробнее
Номер записи: 16
04-01-2018 дата публикации

CONFIGURATIONS AND METHODS FOR SMALL SCALE LNG PRODUCTION

Номер: US20180003429A1
Автор: Mak John
Принадлежит:

An LNG plant comprises a cold box and a refrigeration unit fluidly coupled with a plurality of heat exchanger passes in the cold box. The refrigeration unit is configured to provide a first refrigerant stream to a first heat exchanger pass of the plurality of heat exchanger passes at a first pressure, a second refrigerant stream to a second heat exchanger pass at a second pressure, and a third refrigerant stream to a third heat exchanger pass at a third pressure. The second refrigerant stream comprises a first portion of the first refrigerant stream, and the third refrigerant stream comprises a second portion of the first refrigerant stream. The second pressure and the third pressure are both below the first pressure. The cold box is configured to produce LNG from a natural gas feed stream to the cold box using a refrigeration content from the refrigeration unit. 1. An LNG plant comprising:a cold box comprising a plurality of heat exchanger passes; and a first compressor unit configured to compress a refrigerant to produce a compressed refrigerant at a first pressure;', 'a first heat exchanger pass of the plurality of heat exchanger passes, wherein the first heat exchanger pass is configured to pass the compressed refrigerant through the cold box to cool the compressed refrigerant;', 'a splitter configured to separate the cooled, compressed refrigerant into a first portion and a second portion;', 'a first expander configured to receive the first portion from the splitter and expand the first portion to a second pressure, wherein the second pressure is less than the first pressure;', 'a second expander configured to receive the second portion from the splitter and expand the second portion to a third pressure, wherein the third pressure is less than the second pressure;', 'a second heat exchanger pass of the plurality of heat exchanger passes configured to pass the first portion at the second pressure through the cold box;', 'a third heat exchanger pass of the ...

Подробнее
Номер записи: 17
04-01-2018 дата публикации

METHOD FOR THE PRODUCTION OF AIR GASES BY THE CRYOGENIC SEPARATION OF AIR

Номер: US20180003433A1
Автор: KONG Paul, PHAM-HUY Minh, YIP Wendy
Принадлежит: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

A method for the production of air gases by the cryogenic separation of air can include the steps of sending a purified and compressed air stream to a cold box under conditions effective for cryogenically separating the air stream into an oxygen product and nitrogen using a system of columns, wherein the purified and compressed air stream is at a feed pressure when entering the system of columns; withdrawing the oxygen product at a product pressure; delivering the oxygen product at a delivery pressure to an oxygen pipeline, wherein the oxygen pipeline has a pipeline pressure; wherein during the second mode of operation, the method can include monitoring the pipeline pressure; and reducing the difference between the pipeline pressure and the delivery pressure. By operating the method in a dynamic fashion, a power savings can be realized in instances in which the pipeline pressure deviates from its highest value. 1. A method for the production of air gases by the cryogenic separation of air , the method comprising the steps of:{'sub': 'o', 'a) compressing air to a pressure suitable for the cryogenic rectification of air to produce a compressed humid air stream, the compressed humid air stream having a first pressure P;'}b) purifying the compressed humid air stream of water and carbon dioxide within a front end purification system to produce a dry air stream having reduced amounts of water and carbon dioxide as compared to the compressed humid air stream;{'sub': 'B1', 'c) compressing a first portion of the dry air stream in a booster compressor to form a boosted air stream, the boosted air stream having a first boosted pressure P;'}d) introducing a second portion of the dry air stream and the boosted air stream to a cold box under conditions effective to separate air to form an air gas product, wherein the air gas product is selected from the group consisting of oxygen, nitrogen, and combinations thereof;{'sub': 'P1', 'e) withdrawing the air gas product from the cold ...

Подробнее
Номер записи: 18
04-01-2018 дата публикации

APPARATUS FOR THE PRODUCTION OF AIR GASES BY THE CRYOGENIC SEPARATION OF AIR

Номер: US20180003434A1
Автор: KONG Paul, PHAM-HUY Minh, YIP Wendy
Принадлежит: L'Air Liquide, Société Anonyme pour I'Etude et I'Exploitation des Procédés Georges Claude

An apparatus for the production of air gases by the cryogenic separation of air can include a cold box having a heat exchanger, and a system of columns; a pressure monitoring device; and a controller. The cold box can be configured to receive a purified and compressed air stream under conditions effective for cryogenically separating the air stream to form an air gas product. The apparatus may also include means for transferring the air gas product from the cold box to an air gas pipeline. The pressure monitoring device is configured to monitor the pipeline pressure, and the controller is configured to adjust the product pressure of the air gas product coming out of the cold box based upon the pipeline pressure. 1. An apparatus for the production of air gases by the cryogenic separation of air , the apparatus comprising:{'sub': 'o', 'a) a main air compressor configured to compress air to a pressure suitable for the cryogenic rectification of air to produce a compressed humid air stream, the compressed humid air stream having a first pressure P;'}b) a front end purification system configured to purify the compressed humid air stream of water and carbon dioxide to produce a dry air stream having reduced amounts of water and carbon dioxide as compared to the compressed humid air stream;{'sub': 'B1', 'c) a booster compressor in fluid communication with the front end purification system, wherein the booster compressor is configured to compress a first portion of the dry air stream to form a boosted air stream, the boosted air stream having a first boosted pressure P;'}d) a cold box comprising a main heat exchanger, a system of columns having a double column composed of a lower pressure column and a higher pressure column, a condenser disposed at a bottom portion of the lower pressure column, and a liquid oxygen pump, wherein the cold box is configured to receive the boosted air stream and a second portion of the dry air stream under conditions effective to separate air ...

Подробнее
Номер записи: 19
04-01-2018 дата публикации

APPARATUS FOR OPERATING AN AIR SEPARATION PLANT

Номер: US20180003435A1
Автор: KONG Paul, PHAM-HUY Minh, YIP Wendy
Принадлежит: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

An apparatus for the production of air gases with variable liquid production by the cryogenic separation of air can include a cold box having a heat exchanger, and a system of columns; a pressure monitoring device; and a controller. The cold box can be configured to receive a purified and compressed air stream under conditions effective for cryogenically separating the air stream to form an air gas product. The apparatus may also include means for transferring the air gas product from the cold box to an air gas pipeline. The pressure monitoring device is configured to monitor the pipeline pressure, and the controller is configured to adjust the product pressure of the air gas product coming out of the cold box based upon the pipeline pressure and to further adjust liquid production from the cold box based on the adjusted product pressure. 1. An apparatus for the production of air gases by the cryogenic separation of air , the apparatus comprising:{'sub': 'o', 'a) a main air compressor configured to compress air to a pressure suitable for the cryogenic rectification of air to produce a compressed humid air stream, the compressed humid air stream having a first pressure P;'}b) a front end purification system configured to purify the compressed humid air stream of water and carbon dioxide to produce a dry air stream having reduced amounts of water and carbon dioxide as compared to the compressed humid air stream;{'sub': 'B1', 'c) a booster compressor in fluid communication with the front end purification system, wherein the booster compressor is configured to compress a first portion of the dry air stream to form a boosted air stream, the boosted air stream having a first boosted pressure P;'}d) a cold box comprising a main heat exchanger, a system of columns having a double column composed of a lower pressure column and a higher pressure column, a condenser disposed at a bottom portion of the lower pressure column, and a liquid oxygen pump, wherein the cold box is ...

Подробнее
Номер записи: 20
04-01-2018 дата публикации

METHOD FOR OPERATING AN AIR SEPARATION PLANT

Номер: US20180003437A1
Автор: KONG Paul, PHAM-HUY Minh, YIP Wendy
Принадлежит: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

A method for the production of air gases with variable liquid production by the cryogenic separation of air can include the steps of sending a purified and compressed air stream to a cold box under conditions effective for cryogenically separating the air stream into an oxygen product and nitrogen using a system of columns, wherein the purified and compressed air stream is at a feed pressure when entering the system of columns; withdrawing the oxygen product at a product pressure; delivering the oxygen product at a delivery pressure to an oxygen pipeline, wherein the oxygen pipeline has a pipeline pressure; wherein during the second mode of operation, the method can include monitoring the pipeline pressure; reducing the difference between the pipeline pressure and the delivery pressure; and adjusting liquid production from the cold box. By operating the method in a dynamic fashion, additional liquid production can be realized in instances in which the pipeline pressure deviates from its highest value. 1. A method for the production of air gases with variable liquid production by the cryogenic separation of air , the method comprising the steps of:{'sub': 'o', 'a) compressing air to a pressure suitable for the cryogenic rectification of air to produce a compressed humid air stream, the compressed humid air stream having a first pressure P;'}b) purifying the compressed humid air stream of water and carbon dioxide within a front end purification system to produce a dry air stream having reduced amounts of water and carbon dioxide as compared to the compressed humid air stream;{'sub': 'B1', 'c) compressing a first portion of the dry air stream in a booster compressor to form a boosted air stream, the boosted air stream having a first boosted pressure P;'}d) introducing a second portion of the dry air stream and the boosted air stream to a cold box under conditions effective to separate air to form an air gas product, wherein the air gas product is selected from the ...

Подробнее
Номер записи: 21
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 ...

Подробнее
Номер записи: 22
12-01-2017 дата публикации

Systems and Methods for the Production of Liquefied Natural Gas Using Liquefied Natural Gas

Номер: US20170010041A1
Автор: Gupte Parag A., Huntington Richard A., JR. Fritz, Pierre
Принадлежит:

Described herein are systems and processes to produce liquefied nitrogen (LIN) using liquefied natural gas (LNG) as the refrigerant. The LIN may be produced by indirect heat exchange of at least one nitrogen gas stream with at least two LNG streams within at least one heat exchanger where the LNG streams are at different pressures. 1. A method for producing a liquefied first gas stream at a gas processing facility comprising:(a) providing a first gas stream;(b) providing a liquefied second gas stream, where the second gas is different than the first gas and where the liquefied second gas stream is produced from the liquefaction of a second gas stream at a location that is different from the gas processing facility;(c) splitting the liquefied second gas stream into at least a first liquefied second gas stream and a second liquefied second gas stream;(d) reducing the pressure of the first liquefied second gas stream such that the pressure of the first liquefied second gas stream is less than that of the second liquefied second gas stream;(e) liquefying the first gas stream to form a liquefied first gas stream by indirect heat exchange of the first gas stream with the first liquefied second gas stream and the second liquefied second gas stream;(f) vaporizing at least a portion of the first liquefied second gas stream to form a first second gas stream;(g) vaporizing at least a portion of the second liquefied second gas stream to form a second second gas stream;(h) compressing at least one of the first second gas stream and the second second gas stream to form a compressed second gas stream.2. A method for producing a liquefied nitrogen gas (LIN) stream at a liquid natural gas (LNG) regasification facility comprising:(a) providing a nitrogen gas stream;(b) providing at least two LNG streams where the pressures of each LNG stream are independent and different from each other;(c) liquefying the nitrogen gas stream by indirect heat exchange of the nitrogen gas stream with ...

Подробнее
Номер записи: 23
11-01-2018 дата публикации

AIR SEPARATION METHOD AND APPARATUS

Номер: US20180010848A1
Автор: Prosser Neil M.
Принадлежит:

A method and apparatus for separating air in which an oxygen-rich liquid stream is pumped and then heated within a heat exchanger to produce an oxygen product through indirect heat exchange with first and second boosted pressure air streams. The first boosted pressure air stream is cold compressed at an intermediate temperature of the heat exchanger, reintroduced into the heat exchanger at a warmer temperature and then fully cooled and liquefied. The second boosted pressure air stream, after having been partially cooled, is expanded to produce an exhaust stream that is in turn introduced into a lower pressure column producing the oxygen-rich liquid. The second boosted pressure air stream is partially cooled to a temperature no greater than the intermediate temperature at which the cold compression occurs so that both the first and second boosted pressure air streams are able to take part in the heating of the oxygen-rich stream. 1. (canceled)2. (canceled)3. (canceled)4. (canceled)5. (canceled)6. (canceled)7. (canceled)8. (canceled)9. (canceled)10. (canceled)11. (canceled)12. (canceled)13. (canceled)14. (canceled)15. (canceled)16. (canceled)17. (canceled)18. (canceled)19. (canceled)20. (canceled)21. (canceled)22. (canceled)23. (canceled)24. (canceled)25. (canceled)26. (canceled)27. (canceled)28. (canceled)29. An apparatus for separating air comprising:one or more main air compressors configured for producing a stream of compressed and purified air, wherein the stream of compressed and purified air is split into a first part of the stream of compressed and purified air, a second part of the stream of compressed and purified air that is further compressed in a first booster compressor to produce a first boosted pressure air stream, and a third part of the stream of compressed and purified air that is further compressed in a second booster compressor to produce a second boosted pressure air stream;a main heat exchange system configured to cool the first part of the ...

Подробнее
Номер записи: 24
19-01-2017 дата публикации

Liquid Air Energy Storage Systems, Devices, and Methods

Номер: US20170016577A1
Автор: Leon Afremov, Stanislav Sinatov
Принадлежит: MADA ENERGIE LLC

Liquid air energy storage (LAES) systems with increased efficiency and operating profit obtained through rational selection and configuration of the equipment used and optimization of the configuration/parameters of such equipment. In various embodiments, the LAES system is intended for operation preferably in an environmentally-friendly stand-alone regime with recovery of hot thermal energy extracted from compressed charging air and cold thermal energy extracted from discharged air.

Подробнее
Номер записи: 25
19-01-2017 дата публикации

Liquefied Natural Gas Production System and Method With Greenhouse Gas Removal

Номер: US20170016667A1
Автор: Fritz Pierre, Jr., Parag A. GUPTE, Richard A. Huntington, Robert D. Denton
Принадлежит: Individual

Described herein are systems and processes to produce liquefied natural gas (LNG) using liquefied nitrogen (LIN) as the refrigerant. Greenhouse gas contaminants are removed from the LIN using a greenhouse gas removal unit.

Подробнее
Номер записи: 26
19-01-2017 дата публикации

Increasing Efficiency In An LNG Production System By Pre-Cooling A Natural Gas Feed Stream

Номер: US20170016668A1
Автор: Denton Robert D., Gupte Parag A., Huntington Richard A., JR. Fritz, Pierre
Принадлежит:

Described herein are systems and processes to produce liquefied natural gas (LNG) using liquefied nitrogen (LIN) as the refrigerant. Greenhouse gas contaminants are removed from the LIN using a greenhouse gas removal unit. The LNG is compressed prior to being cooled by the LIN. 1. A liquefied natural gas production system , the system comprising:a natural gas stream from a supply of natural gas;a refrigerant stream from a refrigerant supply;at least one heat exchanger that exchanges heat between the refrigerant stream and the natural gas stream to at least partially vaporize the refrigerant stream and at least partially condense the natural gas stream;a natural gas compressor that compresses the natural gas stream to a pressure of at least to 135 bara to form a compressed natural gas stream;a natural gas cooler that cools the compressed natural gas stream after being compressed by the natural gas compressor; anda natural gas expander that expands the compressed natural gas to a pressure less than 200 bara, but no greater than the pressure to which the natural gas compressor compresses the natural gas stream, after being cooled by the natural gas cooler;wherein the natural gas expander is connected to the at least one heat exchanger to supply natural gas thereto.2. The liquefied natural gas production system of claim 1 , wherein the natural gas compressor compresses the natural gas stream to a pressure greater than 200 bara.3. The liquefied natural gas production system of claim 1 , wherein the natural gas expander expands the compressed natural gas stream to a pressure less than 135 bara.4. The liquefied natural gas production system of claim 1 , wherein the at least one heat exchanger comprises a first heat exchanger claim 1 , and further comprising a second heat exchanger that cools the natural gas stream prior to the natural gas stream being compressed in the natural gas compressor.5. The liquefied natural gas production system of claim 4 , wherein the ...

Подробнее
Номер записи: 27
18-01-2018 дата публикации

Heavy hydrocarbon removal from lean gas to lng liquefaction

Номер: US20180017319A1
Автор: Jacob Thomas, John Mak
Принадлежит: Fluor Technologies Corp

A system for processing a gas stream can include a physical solvent unit, an acid gas removal unit upstream or downstream of the physical solvent unit, and an LNG liquefaction unit downstream of the acid gas removal unit. The physical solvent unit is configured to receive a feed gas, remove at least a portion of any C 5+ hydrocarbons in the feed gas stream using a physical solvent, and produce a cleaned gas stream comprising the feed gas stream with the portion of the C 5+ hydrocarbons removed. The acid gas removal unit is configured to receive the cleaned gas stream, remove at least a portion of any acid gases present in the cleaned gas stream, and produce a treated gas stream. The LNG liquefaction unit is configured to receive the treated gas stream and liquefy at least a portion of the hydrocarbons in the treated gas stream.

Подробнее
Номер записи: 28
26-01-2017 дата публикации

METHOD AND INSTALLATION FOR STORING AND RECOVERING ENERGY

Номер: US20170022897A1
Автор: Alekseev Alexander, Bergins Christian, Stiller Christoph, Stöver Brian
Принадлежит:

A method and installation for storing and recovering energy, according to which a condensed air product is formed in an energy storage period, and in an energy recovery period, a pressure flow is formed and is expanded to produce energy using at least part of the condensed air product. For the formation of the condensed air product: the compression of air in an air conditioning unit, at least by means of at least one isothermally operated compressor device and the adsorptive cleaning of the air by means of at least one adsorptive cleaning device at a hyperbaric pressure level. 1. A method for storing and recovering energy in which , in an energy storage period , an air liquefaction product is formed and , in an energy recovery period , a pressurized stream is formed and expanded to perform work by using at least part of the air liquefaction product , the method comprising , compressing air in an air conditioning unit, at least by means of at least one isothermally operated compressor device, and adsorptively purifying the air by means of at least one adsorptive purification device at a superatmospheric pressure level,', 'liquefying the compressed and adsorptively purified air, starting from a temperature level in a range of 0 to 50° C., in a first fraction in a fixed-bed cold storage unit and in a second fraction in a counterflow heat exchanger unit at a liquefaction pressure level in a range of 40 to 100 bara, and', 'subsequently expanding the liquefied air in at least one cold production unit,, 'for the formation of the air liquefaction product,'} producing a vaporization product from at least part of the liquefaction product at a vaporization pressure level, which deviates by no more than 5 bar from the liquefaction pressure level, in the fixed-bed cold storage unit, and', 'forming a fluid stream from at least part of the vaporization product and conducting it through at least one combustion device, in which a fuel is burned., 'and, for the formation of the ...

Подробнее
Номер записи: 29
28-01-2016 дата публикации

Air separation method and apparatus

Номер: US20160025408A1
Автор: Neil M. Prosser, Yang Luo, Zhengrong Xu
Принадлежит: Praxair Technology Inc

A method and apparatus for separating air by cryogenic rectification in which cooled, compressed and purified air is separated in a distillation column system having higher and lower pressure columns operatively associated with one another in a heat transfer relationship to produce an oxygen-rich liquid stream from the lower pressure column. The oxygen-rich liquid stream is pumped and heated through indirect heat exchange with a compressed heat exchange stream to form a pressurized oxygen product stream. Part of the air is sequentially and successively compressed in booster compressors driven by turboexpanders to form the compressed heat exchange stream while other parts of the air are expanded in turboexpanders driving the booster compressors to form exhaust streams that are introduced into both the higher and lower pressure columns to generate refrigeration.

Подробнее
Номер записи: 30
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 ...

Подробнее
Номер записи: 31
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, ...

Подробнее
Номер записи: 32
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.

Подробнее
Номер записи: 33
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 ...

Подробнее
Номер записи: 34
02-02-2017 дата публикации

AIR SEPARATION APPARATUS

Номер: US20170030643A1
Автор: Dowd Sophia J., Rauch Jeremiah J., Sarigiannis Catherine B., Warta Andrew M.
Принадлежит:

A method and apparatus for separating air in which production of the liquid products can be selectively varied between high and low production rates by varying the pressure ratio across a turboexpander used in imparting refrigeration with the use of a branched flow path. The branched flow path has a system of valves to selectively and gradually introduce a compressed refrigerant air stream into either a booster compressor branch having a booster compressor to increase the pressure ratio during high modes of liquid production or a bypass branch that bypasses the booster compressor to decrease the pressure ratio during low modes of liquid production. A recycle branch is connected to the booster compressor branch to allow compressed air to be independently recycled from the outlet to the inlet of the booster compressor during turndown from the high to the low liquid mode of liquid production to prevent surge. 1. (canceled)2. (canceled)3. (canceled)4. (canceled)5. (canceled)6. (canceled)7. (canceled)8. (canceled)9. (canceled)10. (canceled)11. An air separation apparatus comprising:an air separation plant having a main air compressor, a purification unit connected to the main air compressor, a main heat exchanger in flow communication with the purification unit to cool the air, a distillation column system connected to the main heat exchanger and configured to rectify the air and thereby to produce at least one liquid product and a constant speed turboexpander connected to the distillation column system so that an exhaust stream generated by the constant speed turboexpander is introduced into the distillation column system, thereby to impart refrigeration to the air separation plant, the constant speed turboexpander not directly coupled to a single compressor of the air separation plant on a common pinion;the air separation plant also having a branched flow path positioned between the pre-purification unit and the constant speed turboexpander to receive a compressed ...

Подробнее
Номер записи: 35
01-02-2018 дата публикации

Carbon Dioxide Capture from Flu Gas

Номер: US20180031315A1
Автор: Baxter Larry
Принадлежит:

A method for capturing carbon dioxide from a flue gas includes (i) removing moisture from a flue gas to yield a dried flue gas; (ii) compressing the dried flue gas to yield a compressed gas stream; (iii) reducing the temperature of the compressed gas stream to a temperature Tusing a first heat exchanger; (iv) reducing the temperature of the compressed gas stream to a second temperarature Tusing a second heat exchanger stream, where T Подробнее

Номер записи: 36
05-02-2015 дата публикации

System and integrated process for liquid natural gas production

Номер: US20150033792A1
Автор: Douglas Carl Hofer, Roger Allen Shisler, Vitali Victor Lissianski
Принадлежит: General Electric Co

A system and method for producing liquid natural gas (LNG) from a natural gas stream is presented. The system includes a moisture removal device and compressor for removing moisture from and compressing the natural gas stream. The low moisture compressed natural gas stream is cooled in a heat exchanger to discharge a cooled compressed discharge stream. A multi-phase turbo expander provides for further cooling and expansion of the cooled compressed discharge stream, generating an expanded exhaust stream comprising a mixture of a vapor comprised substantially of CH 4 and a LNG/ice/solid CO 2 slurry. The expanded exhaust stream is separated to generate a vapor stream comprised substantially of CH 4 and a liquid natural gas/ice/solid CO 2 slurry stream. Further separation of the liquid natural gas/ice/solid CO 2 slurry stream generates a liquid natural gas output stream and an output stream comprised substantially of ice/solid CO 2 .

Подробнее
Номер записи: 37
30-01-2020 дата публикации

PROCESS FOR SEPARATING HYDROCARBON COMPOUNDS

Номер: US20200031736A1
Автор: Edwards Justin Dwight, Rahmim Iraj Isaac, Vuddagiri Srinivas R., Weinberger Sam, Wolfenbarger Julian
Принадлежит:

Disclosed herein are processes for producing and separating ethane and ethylene. In some embodiments, an oxidative coupling of methane (OCM) product gas comprising ethane and ethylene is introduced to a separation unit comprising two separators. Within the separation unit, the OCM product gas is separated to provide a C-rich effluent, a methane-rich effluent, and a nitrogen-rich effluent. Advantageously, in some embodiments the separation is achieved with little or no external refrigeration requirement. 155.-. (canceled)56. A system for providing Ccompounds via oxidative coupling of methane (OCM) , comprising:at least one catalytic OCM reactor system including at least one OCM catalyst to provide an OCM product gas including at least ethane, ethylene, oxygen and nitrogen, wherein each OCM reactor system includes at least a means to provide a gas mixture including at least methane and oxygen prior to introduction to at least one OCM reactor; and{'sub': 2', '2, 'a first separations system to cryogenically separate the OCM product gas into at least a C-rich effluent that includes at least one Ccompound and a gas mixture effluent that includes methane and nitrogen.'}57. The system of wherein at least a portion of the methane in the gas mixture is provided by a feedstock gas and the feedstock gas is heated to about 600° C. or less and is at a pressure of 150 pounds per square inch gauge (psig) or less.58. The system of claim 56 , further comprising:at least one OCM product gas compressor to increase the pressure of the OCM product gas to about 200 pounds per square inch gauge (psig) or more prior to the first separations system.59. The system of claim 58 , further comprising:{'sub': '2', 'at least one turboexpander to expand a first portion of the high pressure OCM product gas and to provide a mechanical shaft work output prior to separating the first portion of the OCM product gas into the C-rich effluent and the gas mixture effluent.'}60. The system of further ...

Подробнее
Номер записи: 38
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 ...

Подробнее
Номер записи: 39
09-02-2017 дата публикации

Methods and systems for integration of industrial site efficiency losses to produce lng and/or lin

Номер: US20170038132A1
Автор: Alain Guillard, Michael A. Turney
Принадлежит: LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude

A method includes receiving input corresponding to a proposed configuration of a liquefaction facility and identifying a plurality of components utilized to produce LNG and/or LIN at the facility. The method includes determining an alternative configuration that is different from the proposed configuration. Determining the alternative configuration may include identifying resources accessible to a proposed location for the liquefaction facility and whether at least one of the resources accessible to the proposed location corresponds to a resource generated by a component identified by the proposed configuration, and determining whether to omit at least one component of the plurality of components identified by the proposed configuration. The method includes omitting the at least one component from the alternative configuration, and generating a report based on the proposed configuration and the alternative configuration. The report includes information indicating a difference between the proposed configuration and the alternative configuration.

Подробнее
Номер записи: 40
09-02-2017 дата публикации

METHOD FOR THE INTEGRATION OF A NITROGEN LIQUEFIER AND LETDOWN OF NATURAL GAS FOR THE PRODUCTION OF LIQUID NITROGEN AND LOWER PRESSURE NATURAL GAS

Номер: US20170038133A1
Автор: FARGES Oriane, Guillard Alain, TURNEY Michael A.
Принадлежит: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

A method describing the integration of a nitrogen liquefier and letdown of natural gas for the production of liquid nitrogen and lower pressure natural gas is provided. The method may include: providing a nitrogen liquefier having a nitrogen refrigeration cycle, wherein the nitrogen liquefier comprises a nitrogen compressor, a nitrogen recycle compressor, a heat exchanger, and at least a first turbine booster and introducing a nitrogen gas stream to the nitrogen liquefier under conditions effective for liquefying the nitrogen to produce a liquid nitrogen product. The refrigeration needed to liquefy the nitrogen is provided for by the nitrogen refrigeration cycle and letdown of a high pressure natural gas stream. 1. A method for the integration of a nitrogen liquefier and letdown of natural gas for the production liquid nitrogen (“LIN”) , the method comprising the steps of:a) providing a nitrogen liquefier having a nitrogen refrigeration cycle, wherein the nitrogen liquefier comprises a nitrogen recycle compressor, a heat exchanger, and a first turbine booster;b) introducing a nitrogen gas stream to the nitrogen liquefier under conditions effective for liquefying the nitrogen to produce a liquid nitrogen product;{'sub': 'H', 'c) withdrawing a natural gas stream from a source operating at a first pressure P;'}d) purifying the natural gas stream in a purification unit to produce a purified natural gas;e) partially cooling the purified natural gas in the heat exchanger;withdrawing the partially cooled natural gas from an intermediate section of the heat exchanger;{'sub': M', 'M', 'H, 'g) expanding the partially cooled natural gas to a medium pressure Pin a natural gas expansion turbine to form a cold natural gas stream, wherein the medium pressure Pis at a pressure lower than the first pressure P; and'}h) warming the cold natural gas stream in the heat exchanger by heat exchange against nitrogen from the nitrogen refrigeration cycle to produce a warm natural gas stream ...

Подробнее
Номер записи: 41
09-02-2017 дата публикации

METHOD FOR THE PRODUCTION OF LIQUEFIED NATURAL GAS

Номер: US20170038134A1
Автор: FARGES Oriane, Guillard Alain, TURNEY Michael A.
Принадлежит: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

A method for the production of liquefied natural gas is provided. The method may include providing a high pressure natural gas stream, splitting the high pressure natural gas stream into a first portion and a second portion, and liquefying the first portion of the high pressure natural gas stream to produce an LNG stream. The refrigeration needed for cooling and liquefaction of the natural gas can be provided by a closed nitrogen refrigeration cycle and letdown of the second portion of the high pressure natural gas stream. 1. A method for the production of liquefied natural gas (“LNG”) , the method comprising the steps of:a) providing a nitrogen refrigeration cycle, wherein the nitrogen refrigeration cycle is configured to provide refrigeration within a heat exchanger;b) purifying a first natural gas stream in a first purification unit to remove a first set of impurities to produce a purified first natural gas stream;{'sub': 'H', 'c) cooling and liquefying the first natural gas stream in the heat exchanger using the refrigeration from the nitrogen refrigeration cycle to produce an LNG stream, wherein the first natural gas stream has an LNG refrigeration requirement, wherein the LNG stream is liquefied at a first pressure P;'}d) purifying a second natural gas stream in a second purification unit to remove a second set of impurities to produce a purified second natural gas stream;e) partially cooling the second natural gas stream in the heat exchanger;f) withdrawing the partially cooled second natural gas stream from an intermediate section of the heat exchanger;{'sub': M', 'M', 'H, 'g) expanding the partially cooled second natural gas stream to a medium pressure Pin a natural gas expansion turbine to form a cold natural gas stream, wherein the medium pressure Pis at a pressure lower than the first pressure P; and'}h) warming the cold natural gas stream in the heat exchanger by heat exchange against the first natural gas stream to produce a warm natural gas stream at ...

Подробнее
Номер записи: 42
09-02-2017 дата публикации

METHOD FOR THE PRODUCTION OF LIQUEFIED NATURAL GAS AND LIQUID NITROGEN

Номер: US20170038135A1
Автор: FARGES Oriane, Guillard Alain, TURNEY Michael A.
Принадлежит: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

A method for the production of liquefied natural gas and liquid nitrogen is provided. The method may include providing a high pressure natural gas stream, splitting the high pressure natural gas stream into a first portion and a second portion, and liquefying the first portion of the high pressure natural gas stream to produce an LNG stream. The refrigeration needed for cooling and liquefaction of the natural gas and liquefaction of the nitrogen can be provided by a nitrogen refrigeration cycle and letdown of the second portion of the high pressure natural gas stream. 1. A method for the production of liquefied natural gas (“LNG”) and liquid nitrogen (“LIN”) , the method comprising the steps of:a) providing a nitrogen refrigeration cycle, wherein the nitrogen refrigeration cycle is configured to provide refrigeration within a heat exchanger, wherein a portion of the nitrogen within the nitrogen refrigeration cycle is withdrawn and liquefied yielding a liquid nitrogen product, wherein at least an equal portion of gaseous nitrogen is introduced to the nitrogen refrigeration cycle as is withdrawn;b) purifying a first natural gas stream in a first purification unit to remove a first set of impurities to produce a purified first natural gas stream;{'sub': 'H', 'c) cooling and liquefying the first natural gas stream in the heat exchanger using the refrigeration from the nitrogen refrigeration cycle to produce an LNG stream, wherein the first natural gas stream has an LNG refrigeration requirement, wherein the LNG stream is liquefied at a first pressure P;'}d) purifying a second natural gas stream in a second purification unit to remove a second set of impurities to produce a purified second natural gas stream;e) partially cooling the second natural gas stream in the heat exchanger;f) withdrawing the partially cooled second natural gas stream from an intermediate section of the heat exchanger;{'sub': M', 'M', 'H, 'g) expanding the partially cooled second natural gas stream ...

Подробнее
Номер записи: 43
09-02-2017 дата публикации

METHOD FOR THE INTEGRATION OF A NITROGEN LIQUEFIER AND LIQUEFACTION OF NATURAL GAS FOR THE PRODUCTION OF LIQUEFIED NATURAL GAS AND LIQUID NITROGEN

Номер: US20170038136A1
Автор: FARGES Oriane, Guillard Alain, TURNEY Michael A.
Принадлежит: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

A method for the integration of a nitrogen liquefier and liquefaction of natural gas for the production of liquefied natural gas and liquid nitrogen is provided. The method may include providing a nitrogen liquefaction unit and providing a natural gas liquefaction unit. Liquefaction of the nitrogen can be achieved via a nitrogen refrigeration cycle within the nitrogen liquefaction unit. Liquefaction of the natural gas can be achieved through the use of natural gas letdown and a second nitrogen refrigeration cycle. The two liquefaction units can be integrated via a common nitrogen recycle compressor, thereby providing significant capital savings. 1. A method for the integration of a nitrogen liquefier and natural gas liquefier for the production of liquefied natural gas (“LNG”) and liquid nitrogen (“LIN”) , the method comprising the steps of:a) providing a nitrogen liquefier having a first nitrogen refrigeration cycle, wherein the nitrogen liquefier comprises a turbine, a booster and a plurality of coolers, wherein the first nitrogen refrigeration cycle is configured to provide refrigeration within a first heat exchanger;b) providing a second nitrogen refrigeration cycle, wherein the second nitrogen refrigeration cycle comprises a second turbine, a second booster and a plurality of second coolers, wherein the second nitrogen refrigeration cycle is configured to provide refrigeration within a second heat exchanger;c) purifying a first natural gas stream in a first purification unit to remove a first set of impurities to produce a purified first natural gas stream;{'sub': 'H', 'd) cooling and liquefying the first natural gas stream in the second heat exchanger using the refrigeration from the nitrogen refrigeration cycle to produce an LNG stream, wherein the first natural gas stream has an LNG refrigeration requirement, wherein the LNG stream is liquefied at a first pressure P;'}e) purifying a second natural gas stream in a second purification unit to remove a second ...

Подробнее
Номер записи: 44
09-02-2017 дата публикации

METHOD FOR THE PRODUCTION OF LIQUEFIED NATURAL GAS AND NITROGEN

Номер: US20170038137A1
Автор: TURNEY Michael A.
Принадлежит: L'Air Liquide, Societe Anonyme pour l'Etude et I'Exploitation des Procedes Georges Claude

A method for the production of liquefied natural gas (“LNG”) and nitrogen is provided. The method may include the steps of: a) providing a nitrogen production facility, wherein nitrogen production facility comprises: a main heat exchanger, an air separation unit, a nitrogen recycle compressor, a first nitrogen refrigeration supply configured to provide refrigeration to the main heat exchanger for cooling a main air feed, b) providing a secondary refrigeration supply; c) liquefying a natural gas stream using refrigeration from the secondary refrigeration supply to form an LNG product stream; wherein the secondary refrigeration supply is configured to compress and expand a refrigerant to produce refrigeration, wherein the refrigerant of the secondary refrigeration supply is shared with refrigerant of the first nitrogen refrigeration supply 1. A method for the production of liquefied natural gas (“LNG”) and nitrogen , the method comprising the steps of:a) providing a nitrogen production facility, wherein nitrogen production facility comprises: a main heat exchanger, an air separation unit, a nitrogen recycle compressor, a first nitrogen refrigeration supply configured to provide refrigeration to the main heat exchanger for cooling a main air feed;b) providing a secondary refrigeration supply;c) liquefying a natural gas stream using refrigeration from the secondary refrigeration supply to form an LNG product stream;wherein the secondary refrigeration supply is configured to compress and expand a refrigerant to produce refrigeration, wherein the refrigerant of the secondary refrigeration supply is shared with refrigerant of the first nitrogen refrigeration supply.2. The method as claimed in claim 1 , wherein the secondary refrigeration supply comprises a third turbine-booster claim 1 , wherein the third turbine-booster has a third booster and a third turbine.3. The method as claimed in claim 2 , wherein the natural gas stream is liquefied in a secondary heat exchanger.4. ...

Подробнее
Номер записи: 45
09-02-2017 дата публикации

APPARATUS FOR THE PRODUCTION OF LIQUEFIED NATURAL GAS

Номер: US20170038138A1
Автор: Guillard Alain, TURNEY Michael A.
Принадлежит: L'Air Liquide, Société Anonyme pour I'Etude et I'Exploitation des Procédés Georges Claude

A transportable apparatus for production of liquefied natural gas (LNG) having include a housing, a natural gas feed inlet, a heat exchanger, a phase separator, a liquid outlet disposed on the cold end of the heat exchanger, an LNG product outlet disposed on the cold end of the heat exchanger, a first refrigeration supply, a second refrigeration supply, and wherein the heat exchanger, the phase separator, the first expansion valve, the first refrigeration supply, and the second refrigeration supply are all disposed within the housing. The first refrigeration supply includes expansion of a portion of the LNG product, and the second refrigeration supply can include expansion of another portion of the LNG product or expansion and heat exchange with a supply of liquid nitrogen. The production of LNG is achieved without the external supply of electricity. 1. A transportable apparatus for the production of liquefied natural gas (“LNG”) , the apparatus comprising:a) a housing;b) a natural gas feed inlet configured to accept a stream of pressurized natural gas originating from outside the housing;c) a heat exchanger in fluid communication with the natural gas feed inlet, such that the heat exchanger is configured to receive the stream of pressurized natural gas from the natural gas feed inlet, wherein the heat exchanger has a warm end, a cold end, and an intermediate section;d) a phase separator having a fluid inlet, a gaseous outlet, and a liquid outlet, wherein the fluid inlet is in fluid communication with a first intermediate fluid outlet located in the intermediate section of the heat exchanger, such that the phase separator is configured to receive a partially cooled fluid from the heat exchanger, wherein the gaseous outlet of the phase separator is in fluid communication with a second intermediate fluid inlet of the intermediate section of the heat exchanger, such that the second intermediate fluid inlet of the intermediate section of the heat exchanger is configured ...

Подробнее
Номер записи: 46
09-02-2017 дата публикации

METHOD FOR THE PRODUCTION OF LIQUEFIED NATURAL GAS

Номер: US20170038139A1
Автор: Guillard Alain, TURNEY Michael A.
Принадлежит: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

A method for the production of liquefied natural gas (LNG) without the use of externally provided electricity is provided The method may include the steps of: providing a transportable apparatus, wherein the transportable apparatus comprises a housing, a heat exchanger, a phase separator, a first refrigeration supply, and a second refrigeration supply, wherein the first refrigeration supply and the second refrigeration supply are configured to provide refrigeration within the heat exchanger; introducing a natural gas stream into the transportable apparatus at a first pressure under conditions effective for producing an LNG stream; withdrawing the LNG stream from the transportable apparatus; and withdrawing a warm natural gas stream from the transportable apparatus, wherein the warm natural gas stream is at a second pressure, wherein the second pressure is lower than the first pressure. 1. A method for the production of liquefied natural gas (“LNG”) using a transportable apparatus , the method comprising the steps of:providing a transportable apparatus, wherein the transportable apparatus comprises a housing, a heat exchanger, a phase separator, a first refrigeration supply, and a second refrigeration supply, wherein the first refrigeration supply and the second refrigeration supply are configured to provide refrigeration within the heat exchanger;introducing a natural gas stream into the transportable apparatus at a first pressure under conditions effective for producing an LNG stream;withdrawing the LNG stream from the transportable apparatus; andwithdrawing a warm natural gas stream from the transportable apparatus, wherein the warm natural gas stream is at a second pressure, wherein the second pressure is lower than the first pressure.2. The method as claimed in claim 1 , wherein the first refrigeration supply comprises a first expansion valve claim 1 , a first LNG inlet disposed on a cold end of the heat exchanger claim 1 , and a first natural gas outlet ...

Подробнее
Номер записи: 47
08-02-2018 дата публикации

INTEGRATION OF INDUSTRIAL GAS SITE WITH LIQUID HYDROGEN PRODUCTION

Номер: US20180038638A1
Автор: ANDREEV Kirill, FRANC Pierre-Etienne, Guillard Alain, Roesch Alexander, TURNEY Michael A.
Принадлежит: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

The method for producing liquid hydrogen can include the steps of: introducing pressurized natural gas from a high pressure natural gas pipeline to a gas processing unit under conditions effective for producing a purified hydrogen stream; and introducing the purified hydrogen stream to a hydrogen liquefaction unit under conditions effective to produce a liquid hydrogen stream, wherein the hydrogen liquefaction unit provides a warm temperature cooling and a cold temperature cooling to the purified hydrogen stream, wherein the warm temperature cooling is provided by utilizing letdown energy of a pressurized stream selected from the group consisting of a nitrogen stream sourced from a nitrogen pipeline, a natural gas stream sourced from the high pressure natural gas pipeline, an air gas sourced from an air separation unit, and combinations thereof, wherein the cold temperature is provided by utilizing letdown energy of the purified hydrogen stream. 1. A method for liquefying a pressurized hydrogen gas originating from a pressure swing adsorber unit , the method comprising the steps of:withdrawing a hydrogen containing gas from a methanol production unit;introducing the hydrogen containing gas to a pressure swing adsorber (PSA) unit under conditions effective for purifying the hydrogen containing gas to produce a purified hydrogen stream;sending the purified hydrogen gas to a hydrogen liquefaction unit under conditions effective for the liquefaction of hydrogen thereby producing a liquefied hydrogen stream,wherein the hydrogen liquefaction unit is configured to provide a first refrigeration source and a second refrigeration source, wherein the first refrigeration source provides refrigeration using expansion of a high pressure nitrogen stream, wherein the second refrigeration source provides refrigeration using expansion of a high pressure hydrogen gas stream to produce a warm hydrogen gas stream,wherein the high pressure hydrogen gas stream is derived from a hydrogen ...

Подробнее
Номер записи: 48
08-02-2018 дата публикации

METHOD FOR LIQUEFACTION OF INDUSTRIAL GAS BY INTEGRATION OF METHANOL PLANT AND AIR SEPARATION UNIT

Номер: US20180038641A1
Автор: Guillard Alain, Roesch Alexander, TURNEY Michael A.
Принадлежит: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

A method for the liquefaction of an industrial gas by integration of a methanol plant and an air separation unit (ASU) is provided. The method can include the steps of: (a) providing a pressurized natural gas stream, a pressurized purge gas stream originating from a methanol plant, and a pressurized air gas stream comprising an air gas originating from the ASU; (b) expanding three different pressurized gases to produce three cooled streams, wherein the three different pressurized gases are the pressurized natural gas stream, the pressurized purge gas stream, and the pressurized air gas stream; and (c) liquefying the industrial gas in a liquefaction unit against the three cooled streams to produce a liquefied industrial gas stream. The industrial gas to be liquefied is selected from the group consisting of a first portion of the pressurized natural gas stream, a nitrogen gas stream, hydrogen and combinations thereof. 1. A method for the liquefaction of an industrial gas selected from the group consisting of natural gas , nitrogen , hydrogen and combinations thereof , the method comprising the steps of:a) withdrawing a pressurized natural gas stream from a natural gas pipeline;b) removing carbon dioxide and water from the pressurized natural gas stream;c) expanding the pressurized natural gas stream to form an expanded natural gas stream and warming the expanded natural gas stream in a first portion of a heat exchanger against the industrial gas to form a warmed natural gas stream;d) sending the warmed natural gas stream to a methanol production facility under conditions effective for producing a methanol stream, a purified hydrogen stream, and a purge gas rich in hydrogen;e) expanding the purge gas rich in hydrogen to form an expanded purge gas and warming the expanded purge gas in a second portion of the heat exchanger against the industrial gas to form a warmed purge gas stream;f) sending the warmed purge gas stream to the methanol production facility for use as ...

Подробнее
Номер записи: 49
08-02-2018 дата публикации

PROCESS INTEGRATION OF A GAS PROCESSING UNIT WITH LIQUEFACTION UNIT

Номер: US20180038642A1
Автор: Guillard Alain, Roesch Alexander, TURNEY Michael A.
Принадлежит: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

It is proposed to integrate a gas processing unit with a liquefaction unit. The industrial gas stream may be but is not limited to air gases of oxygen, nitrogen argon, hydrocarbon, LNG, syngas or its components, CO, or any other molecule or combination of molecules. It is proposed to integrate the underutilized process inefficiencies of a gas processing unit into the liquefaction unit to produce a liquid at a reduced operating cost. The gas processing unit may be any system or apparatus which alters the composition of a feed gas. Examples could be, but are not limited to, a methanol plant, steam methane reformer, cogeneration plant, and partial oxidation unit. 1. A process for the production of a liquid by integration of a gas processing unit and a liquefaction unit , the process comprising the steps of:a) providing a gas processing unit;b) providing a liquefaction unit, wherein the liquefaction unit is in fluid communication with the gas processing unit, such that the liquefaction unit and the gas processing unit are configured to send and receive fluids from each other;c) extracting a letdown energy from a high pressure gas to produce refrigeration to be used within the liquefaction unit, thereby producing a low pressure gas, wherein the low pressure gas is then used by the gas processing unit as a low pressure feedstream;d) liquefying an industrial gas within the liquefaction unit using refrigeration produced in step c).2. The process as claimed in claim 1 , wherein the gas processing unit is selected from the group consisting of a methanol plant claim 1 , a steam methane reformer claim 1 , a cogeneration plant claim 1 , a partial oxidation unit claim 1 , an autothermal reforming unit claim 1 , and combinations thereof.3. The process as claimed in claim 1 , wherein the industrial gas is selected from the group consisting of an air gas claim 1 , a hydrocarbon claim 1 , syngas claim 1 , carbon dioxide claim 1 , hydrogen claim 1 , carbon monoxide claim 1 , and ...

Подробнее
Номер записи: 50
08-02-2018 дата публикации

METHOD FOR THE INTEGRATION OF LIQUEFIED NATURAL GAS AND SYNGAS PRODUCTION

Номер: US20180038643A1
Автор: Guillard Alain, Roesch Alexander, TURNEY Michael A.
Принадлежит: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

An integrated method for the production of liquefied natural gas (LNG) and syngas is provided. The method can include the steps of: utilizing letdown energy of a high pressure natural gas stream that is withdrawn from a natural gas pipeline to provide a warm temperature cooling; utilizing a refrigeration cycle to provide a cold temperature cooling, wherein the refrigeration cycle comprises a refrigerant recycle compressor that is powered utilizing a steam turbine; and cooling a second high pressure natural gas stream using the warm temperature cooling and the cold temperature cooling to produce an LNG product stream. The second high pressure natural gas stream is withdrawn from the natural gas pipeline, and the steam turbine is powered by high pressure steam that is produced from a syngas production facility. 1. A method for the production of liquefied natural gas (“LNG”) , the method comprising the steps of:a) operating a syngas production facility that is configured to convert a first natural gas stream into a syngas stream, wherein the syngas production facility is further configured to produce a pressurized steam, wherein the pressurized steam is fed to a steam turbine, wherein during said operating step, the syngas production facility uses a second natural gas stream at a lower pressure than the first natural gas stream;b) cooling and liquefying a third natural gas stream using refrigeration provided by at least two different sources to produce an LNG product stream;c) providing a first source for the refrigeration used in step b) by expanding the second natural gas stream in a natural gas expander and then warming the second natural gas stream, prior to being used in the syngas production facility in step a), against the third natural gas stream; andd) providing a second source for the refrigeration used in step b) using a nitrogen refrigeration cycle, wherein the nitrogen refrigeration cycle comprises a nitrogen recycle compressor and at least one turbine, ...

Подробнее
Номер записи: 51
08-02-2018 дата публикации

METHOD FOR LIQUEFACTION OF INDUSTRIAL GAS BY INTEGRATION OF METHANOL PLANT AND AIR SEPARATION UNIT

Номер: US20180038644A1
Автор: Guillard Alain, Roesch Alexander, TURNEY Michael A.
Принадлежит: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

A method for the liquefaction of an industrial gas by integration of a methanol plant and an air separation unit (ASU) is provided. The method can include the steps of: (a) providing a pressurized natural gas stream, a pressurized purge gas stream composed predominately of hydrogen and originating from a methanol plant, and a pressurized air gas stream comprising an air gas from the ASU; (b) expanding three different pressurized gases to produce three cooled streams, wherein the three different pressurized gases consist of the pressurized natural gas stream, the pressurized purge gas stream, and the pressurized air gas stream; and (c) liquefying the industrial gas in a liquefaction unit against the three cooled streams to produce a liquefied industrial gas stream, wherein the industrial gas to be liquefied is selected from the group consisting of a first portion of the pressurized natural gas stream, a nitrogen gas stream, hydrogen and combinations thereof 1. A method for the liquefaction of an industrial gas selected from the group consisting of natural gas , nitrogen , hydrogen , and combinations thereof , the method comprising the steps of:a) withdrawing a pressurized natural gas stream from a natural gas pipeline;b) removing carbon dioxide and water from the pressurized natural gas stream;c) expanding the pressurized natural gas stream to form an expanded natural gas stream and warming the expanded natural gas stream in a first portion of a heat exchanger against the industrial gas to form a warmed natural gas stream;d) sending the warmed natural gas stream to a methanol production facility under conditions effective for producing a methanol stream, a purified hydrogen stream, and a purge gas rich in hydrogen;e) expanding the purge gas rich in hydrogen to form an expanded purge gas and warming the expanded purge gas in a second portion of the heat exchanger against the industrial gas to form a warmed purge gas stream;f) sending the warmed purge gas stream to the ...

Подробнее
Номер записи: 52
07-02-2019 дата публикации

Systems and Methods for Multi-Stage Refrigeration

Номер: US20190041126A1
Автор: David Ladd
Принадлежит: Bechtel Hydrocarbon Technology Solutions Inc

Systems and methods for multi-stage refrigeration in mixed refrigerant and cascade refrigeration cycles using one or more liquid motive eductors in combination with a pump.

Подробнее
Номер записи: 53
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 ...

Подробнее
Номер записи: 54
07-02-2019 дата публикации

DEVICE AND METHOD FOR SEPARATING AIR BY CRYOGENIC DISTILLATION

Номер: US20190041129A1
Автор: CHAMONTIN Nicolas, Dos Santos Benedicte, Patrice Cavagne, RICHAUME Laurent
Принадлежит: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

Method for separating air by cryogenic distillation, wherein at least part of the air to be distilled is boosted in an air booster, compressed air is allowed to expand in at least one expansion turbine and, if the pressure drop between two points of the booster passes under a threshold and/or a flow of the booster passes under a minimum flow of the booster, part of the air boosted in the booster is allowed to expand without having been cooled between the booster and the expansion turbine and the boosted expanded air is sent upstream or downstream of the at least one turbine, without having been cooled in the heat exchanger, after having been boosted. 1. A device for separating air by cryogenic distillation comprising:an air compressor configured to compress all the air to be distilled;an air booster configured to boost at least part of the air to be distilled;an expansion turbine for receiving compressed air originating from the compressor and optionally from the air booster;a system of cryogenic distillation columns comprising at least one column;a heat exchanger;means for sending air from the compressor to the heat exchanger, which has two ends;means for bleeding cooled air at an intermediate point of the heat exchanger between the two ends and for sending cooled air to the booster;means for sending boosted air from the booster to the heat exchanger;means for sending air cooled in the heat exchanger to the turbine;means for sending air allowed to expand in the turbine to the system of columns;means for extracting an oxygen enriched flow and a nitrogen enriched flow from the system of columns, said means being connected to the heat exchanger;means for allowing the boosted air in the booster to expand;an absence of cooling means between the discharge of the booster and the means for allowing the boosted air to expandmeans for sending air, boosted in the booster and allowed to expand by the expansion means, upstream or downstream of the turbine, without having been ...

Подробнее
Номер записи: 55
07-02-2019 дата публикации

Method and device for separating air by cryogenic distillation

Номер: US20190041130A1
Автор: Benedicte Dos Santos, Patrice Cavagne, Yann-Pierrick Lemaire
Принадлежит: LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude

Method for separating air by cryogenic distillation, wherein air is compressed in a compressor and is subsequently sent to a heat exchanger, with the air cooled in the exchanger being sent to a check valve downstream of the heat exchanger and subsequently to a turbine, the valve being positioned so that air from a short-circuiting duct cannot return to the exchanger from the compressor.

Подробнее
Номер записи: 56
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 ...

Подробнее
Номер записи: 57
16-02-2017 дата публикации

Helium Recovery From Streams Containing Helium, Carbon Dioxide, and at least one of Nitrogen and Methane

Номер: US20170045290A1
Автор: Cao Jin, Higginbotham Paul, Ploeger Jason Michael
Принадлежит: AIR PRODUCTS AND CHEMICALS, INC.

Systems and methods are provided for recovering helium from a feed comprising helium, carbon dioxide, and at least one of nitrogen and methane. The feed is separated in a first separator to form helium-enriched stream and a CO-enriched stream. The helium-enriched stream is separated in a pressure swing adsorption unit to form a helium-rich product stream and a helium-lean stream. At least a portion of the helium-lean stream is recycled to the first separator with the feed. In some embodiments, a membrane separation unit is used to enhance helium recovery. 1. A method for recovering helium from a feed stream containing helium , carbon dioxide and at least one of methane and nitrogen , the method comprising:{'sub': 2', '2, 'introducing a separator feed stream into a separator, the separator feed stream comprising at least a portion of the feed stream, separating the separator feed stream into a first helium-enriched stream and a first CO-enriched stream, and withdrawing the first helium-enriched stream and the first CO-enriched stream from the separator;'}introducing a pressure swing adsorption unit feed stream into a pressure swing adsorption unit, the pressure swing adsorption unit feed stream comprising at least a portion of the first helium-enriched stream, separating the pressure swing adsorption unit feed stream into a helium-rich product stream and a helium-lean stream, and withdrawing the helium-rich product stream and the helium-lean stream from the pressure swing adsorption unit;compressing a compressor feed stream in a compressor to form a compressor effluent stream, the compressor feed stream comprising the helium-lean stream and a helium-enriched permeate stream;introducing a first portion of the compressor effluent stream into a membrane separation unit, separating the first portion of the compressor effluent stream to form the helium-enriched permeate stream and a helium-depleted non-permeate stream, and withdrawing the helium-enriched permeate stream ...

Подробнее
Номер записи: 58
25-02-2021 дата публикации

INTEGRATED PROCESSES AND SYSTEMS FOR CONVERSION OF METHANE TO MULTIPLE HIGHER HYDROCARBON PRODUCTS

Номер: US20210053889A1
Автор: Herger Joel, Iyer Rahul, Madgavkar Ajay, Nyce Greg, Peck Lawrence, Saydah Benjamin, Scher Erik C., Weinberger Samuel
Принадлежит:

Integrated systems are provided for the production of higher hydrocarbon compositions, for example liquid hydrocarbon compositions, from methane using an oxidative coupling of methane system to convert methane to ethylene, followed by conversion of ethylene to selectable higher hydrocarbon products. Integrated systems and processes are provided that process methane through to these higher hydrocarbon products. 1. A method of producing a plurality of hydrocarbon products , the method comprising:using an oxidative coupling of methane (OCM) catalytic reactor to convert methane and a source of oxidant to a first product gas comprising ethylene;introducing separate portions of the first product gas into a first catalytic ethylene conversion system and a second catalytic ethylene conversion system, wherein:the first catalytic ethylene conversion system reacts ethylene from the first product gas with an aromatic hydrocarbon to produce an alkylated aromatic hydrocarbon product, andthe second catalytic ethylene conversion system converts ethylene from the first product gas to a higher hydrocarbon product that is different from the alkylated aromatic hydrocarbon product produced in the first catalytic ethylene conversion system.2. The method of claim 1 , further comprising introducing an additional portion of the first product gas into a third catalytic ethylene conversion system.3. The method of claim 2 , further comprising introducing a further additional portion of the first product gas into a fourth catalytic ethylene conversion system.4. The method of claim 1 , wherein the OCM catalytic reactor comprises nanowire catalyst materials.5. The method of claim 1 , wherein the first product gas comprises 0.5 mol % to 15 mol % of ethylene.6. The method of claim 1 , wherein the first product gas comprises less than 5 mol % of ethylene.7. The method of claim 1 , wherein the first product gas comprises less than 3 mol % of ethylene.8. The method of claim 1 , wherein the first ...

Подробнее
Номер записи: 59
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 ...

Подробнее
Номер записи: 60
25-02-2021 дата публикации

UTILIZATION OF NITROGEN-ENRICHED STREAMS PRODUCED IN AIR SEPARATION UNITS COMPRISING SPLIT-CORE MAIN HEAT EXCHANGERS

Номер: US20210055049A1
Автор: Briglia Alain, ZHAO Bowei
Принадлежит: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

An air separation apparatus and process, which produces gaseous oxygen and/or nitrogen products at an elevated pressure through internal compression of respective liquid products, are disclosed. Split-core main heat exchangers are employed to warm up product streams generated in an air rectification unit against 1) a main feed air stream in the low-pressure heat exchanger and 2) at least one boosted pressure air stream in the high-pressure exchanger. Because the boosted pressure air stream is at a higher pressure and temperature than the main feed air stream, after separate heat exchange in the split main heat exchangers, the subsidiary waste nitrogen stream exiting the high-pressure heat exchanger is also warmer than the subsidiary waste nitrogen stream exiting the low-pressure heat exchanger. The warmer waste nitrogen stream is fed into the air purification unit for regeneration purposes and the cooler waste nitrogen stream is introduced into the nitrogen water tower to perform cooling duty. The two subsidiary waste nitrogen streams are also connected on the warm side of the main heat exchangers to allow flexible distribution of the flow. 127-. (canceled)28. A process of separating air comprising:a) passing a feed air stream sequentially through a main air compressor, an air pre-cooling unit and an air purification unit to produce a main feed air stream, further compressing part of the main feed air stream in a booster air compressor to form a boosted pressure air stream having a higher pressure and a higher temperature than the main feed air stream;b) cooling another part of the main feed air stream in a low-pressure heat exchanger through indirect heat exchange with a first nitrogen-enriched stream produced in an air rectification unit comprising a first column, a second column and a condenser evaporator disposed at the bottom of the second column, wherein the first column is operated at a higher pressure than the second column, thereby producing a first feed ...

Подробнее
Номер записи: 61
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.

Подробнее
Номер записи: 62
23-02-2017 дата публикации

DISTILLATION COLUMN SYSTEM AND PLANT FOR PRODUCTION OF OXYGEN BY CRYOGENIC FRACTIONATION OF AIR

Номер: US20170051971A1
Автор: Goloubev Dimitri
Принадлежит:

A distillation column system and a plant are for production of oxygen by cryogenic fractionation of air. The distillation column system has a high-pressure column and a low-pressure column, a main condenser, and an argon column with an argon column top condenser. The low-pressure column comprises an upper mass transfer region, a lower mass transfer region and a middle mass transfer region. The argon column top condenser is arranged within the low-pressure column between the upper and middle mass transfer regions and is configured as a forced-flow evaporator. 1. A distillation column system for obtaining oxygen by cryogenic fractionation of air , comprisinga high-pressure column and a low-pressure column,a main condenser configured as a condenser-evaporator, the liquefaction space of the main condenser being in flow connection with the top of the high-pressure column,and comprising an argon column whichis in flow connection with an intermediate point in the low-pressure column, andhas means of drawing off an argon-enriched stream andan argon column top condenser which is configured as a condenser-evaporator and is in flow connection with the top of the argon column,the low-pressure column has an upper mass transfer region, a lower mass transfer region and a middle mass transfer region,the middle mass transfer region has at least one first mass transfer space which is open in the upward direction toward the upper mass transfer region and in the downward direction toward the lower mass transfer region,characterized in thatthe upper mass transfer region has a liquid collector at its bottom end,the first mass transfer space has a liquid distributor at its top,the argon column top condenser is arranged within the low-pressure column between the upper and middle mass transfer regions, and in that means of introducing liquid from the liquid collector beneath the upper mass transfer region into the inlet of the evaporation space of the argon column top condenser, and', 'a ...

Подробнее
Номер записи: 63
05-03-2015 дата публикации

Method And Device For Separating A Mixture Containing Carbon Dioxide By Means Of Distillation

Номер: US20150059402A1
Автор: Alain Briglia, Arthur Darde, Frederick Lockwood, Xavier Traversac
Принадлежит: LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude

According to certain embodiments of the invention, a gas containing at least 50% of carbon dioxide is cooled in a first exchanger so as to produce a cooled fluid, a liquid derived from the cooled fluid is sent to a distillation column to be separated therein, a head gas is withdrawn from the distillation column and reheated in the first exchanger, a vat liquid, which is richer in carbon dioxide than the gas containing at least 50% of carbon dioxide, is withdrawn and at least a portion thereof is heated in the first exchanger, at least a first portion of the vat liquid is vaporized in the first exchanger in order to produce a vaporized portion, the vaporized portion is sent back to the column and an NOx removal column is supplied with the liquefied cycle gas produced by vaporizing and reliquefying the vat liquid from the column.

Подробнее
Номер записи: 64
10-03-2022 дата публикации

Natural Gas Liquefaction By A High Pressure Expansion Process

Номер: US20220074652A1
Автор: JR. Fritz, Pierre
Принадлежит:

A method and system for liquefying a methane-rich high-pressure feed gas stream using a first heat exchanger zone and a second heat exchanger zone. The feed gas stream is mixed with a refrigerant stream to form a second gas stream, which is compressed, cooled, and directed to a second heat exchanger zone to be additionally cooled below ambient temperature. It is then expanded to a pressure less than 2,000 psia and no greater than the pressure to which the second gas stream was compressed, and then separated into a first expanded refrigerant stream and a chilled gas stream. The first expanded refrigerant stream is expanded and then passed through the first heat exchanger zone such that it has a temperature that is cooler, by at least 5° F., than the highest fluid temperature within the first heat exchanger zone. 1. A method for liquefying a feed gas stream rich in methane , where the method comprises:(a) providing the feed gas stream at a pressure less than 1,200 psia;(b) compressing the feed gas stream to a pressure of at least 1,500 psia to form a compressed gas stream;(c) cooling the compressed gas stream by indirect heat exchange with an ambient temperature air or water, to form a cooled, compressed gas stream;(d) expanding the cooled, compressed gas stream in at least one work producing expander to a pressure that is less than 2,000 psia and no greater than the pressure to which the gas stream was compressed, to thereby form a chilled gas stream;(e) providing a compressed refrigerant stream with a pressure greater than or equal to 1,500 psia;(f) cooling the compressed refrigerant stream by indirect heat exchange with an ambient temperature air or water, to produce a compressed, cooled refrigerant stream;(g) directing the compressed, cooled refrigerant stream to a second heat exchanger zone, to additionally cool the compressed, cooled refrigerant stream below ambient temperature, to produce a compressed, additionally cooled refrigerant stream;(h) expanding the ...

Подробнее
Номер записи: 65
10-03-2022 дата публикации

METHOD FOR STARTING UP A CRYOGENIC AIR SEPARATION UNIT AND ASSOCIATED AIR SEPARATION UNIT

Номер: US20220074657A1
Автор: Day Eric, Gao Fei, XIE Huali
Принадлежит: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

In a process for starting up an air separation unit, which is at a temperature of above 0° C., the air separation unit comprising a main air compressor for compressing the feed air, a booster driven by a turbine and a venting conduit connected downstream of the booster and upstream of the main heat exchanger wherein in order to start up the air separation unit, once the turbine is operating at said given speed, the venting conduit is opened to send at least part of the air compressed in the booster from the booster outlet to the atmosphere. 115-. (canceled)16. A process for starting up an air separation unit which is at a temperature of above 0° C. , the air separation unit comprising:a main air compressor for compressing the feed air,a main heat exchanger,a conduit for sending compressed air from the main air compressor to the main heat exchanger to be cooled,a booster,a conduit for sending at least part of the compressed air cooled in the main heat exchanger to the booster,means for sending air to the main heat exchanger from the booster, there being no means for cooling the air downstream of the booster and upstream of the main heat exchanger,a column system,at least one turbine connected to receive compressed air from the main air compressor and possibly from the booster, the at least one turbine being connected to the column system to provide air to be distilled in the column system,a conduit from removing an oxygen enriched product from the column system and sending the oxygen enriched product to be warmed in the main heat exchanger,a conduit from removing an nitrogen enriched product from the column system and sending the nitrogen enriched product to be warmed in the main heat exchanger;wherein, during normal operation, the air separation unit is configured such that air is sent from the main air compressor to the heat exchanger, cooled in the heat exchanger, compressed in the booster, cooled in the heat exchanger and separated in the column system, air is ...

Подробнее
Номер записи: 66
01-03-2018 дата публикации

METHODS AND CONFIGURATIONS FOR LNG LIQUEFACTION

Номер: US20180058753A1
Автор: Borsos Steven, Mak John, Patel Dhirav, THOMAS Jacob
Принадлежит:

Embodiments relate generally to systems and methods for pre-cooling a natural gas stream to a liquefaction plant. A system may comprise a compressor configured to receive a first natural gas stream at a first pressure and produce a second natural gas stream at a second pressure; an exchanger, wherein the exchanger is configured to receive the second natural gas stream as the second pressure and cool the second natural gas stream to produce a cooled natural gas stream; and an expander, wherein the expander is configured to receive the cooled natural gas stream and expand the cooled natural gas stream from the second pressure to a third pressure. 1. A system for pre-cooling a natural gas stream to a liquefaction plant , the system comprising:a compressor configured to receive a first natural gas stream at a first pressure and produce a second natural gas stream at a second pressure;an exchanger, wherein the exchanger is configured to receive the second natural gas stream at the second pressure and cool the second natural gas stream to produce a cooled natural gas stream; andan expander, wherein the expander is configured to receive the cooled natural gas stream and expand the cooled natural gas stream from the second pressure to a third pressure.2. The system of claim 1 , wherein the exchanger is an ambient air exchanger configured to exchange heat between the second natural gas stream at the second pressure and an ambient air stream.3. The system of claim 1 , further comprising:a second compressor configured to receive a natural gas feed stream at a fourth pressure and produce a fourth natural gas stream at the first pressure, wherein the first pressure is higher than the fourth pressure; anda second exchanger, wherein the second exchanger is configured to receive the fourth natural gas stream at the first pressure and cool the natural gas stream to produce the first natural gas stream.4. The system of claim 3 , wherein the natural gas stream at the third pressure is ...

Подробнее
Номер записи: 67
01-03-2018 дата публикации

PROCESS AND APPARATUS FOR PRODUCING CARBON MONOXIDE

Номер: US20180058757A1
Автор: Fenner Gary W., Kalp Bryan S., PARVATHIKAR Sameer, Shah Minish M.
Принадлежит:

The present invention relates to a cold box cycle which allows for independent control of the heat supplied for reboilers associated with the separation columns. More specifically, the invention relates to the tight control of the hydrogen removal separation, thus avoiding the possibility of excess reboiling in this separation. Optimal reboiling also results in a lower temperature of the hydrogen depleted liquid from this separation. As this stream is used to provide a portion of the cooling at the cold end of the primary heat exchanger, lower temperatures facilitate cooling of the incoming syngas feed, reducing carbon monoxide (CO) losses into the crude hydrogen stream from the high pressure separator. Lower CO in the crude hydrogen allows for smaller hydrogen purification equipment. 1. A method for the separation of carbon monoxide and hydrogen from a syngas feedstock , comprising:cooling and partially condensing the syngas feedstock containing carbon monoxide and hydrogen in a primary heat exchanger to produce a cooled and partially condensed syngas feed stream;separating the cooled and partially condensed syngas feed stream in a first hydrogen rich vapor stream and a first carbon monoxide rich liquid stream in a high pressure separator;feeding the first carbon monoxide rich liquid stream to a hydrogen removal column operating at a pressure lower than the high pressure separator, wherein a second hydrogen rich vapor stream is separated from a second carbon monoxide rich stream;splitting said second carbon monoxide rich stream into two portions wherein a first portion of the second carbon monoxide rich stream is at least partially vaporized in the primary heat exchanger and providing a second portion of the second carbon monoxide rich stream wherein both portions are introduced into a carbon monoxide/methane column for separating purified carbon monoxide vapor stream from a methane rich liquid stream;separating a portion of the cooled syngas feedstock to provide ...

Подробнее
Номер записи: 68
02-03-2017 дата публикации

Energy recovery from reduction in pressure of a dense phase hydrocarbon fluid

Номер: US20170059091A1
Автор: Jen Kai Chen, Paul Mark Shain, Saham Sam Tafreshi
Принадлежит: Chevron USA Inc

Disclosed are processes in which the pressure of a dense phase fluid stream containing hydrocarbons is reduced to produce a two-phase fluid stream, and energy is recovered. The process includes passing the dense phase fluid stream at a pressure greater than the cricondenbar pressure of the dense phase fluid stream through an expander where the dense phase fluid stream is expanded isentropically such that a two phase fluid stream having a pressure lower than the pressure of the dense phase fluid stream leaves the expander. The expander is coupled to a rotating mechanical power user, such that the expander drives the rotating mechanical power user. The process further includes passing the two phase fluid stream leaving the expander to a separator such that the two phase fluid stream is separated into a vapor phase stream and a liquid phase stream. The composition or quantity of liquid formed can be adjusted to control the dew point of the gas produced from the dense-phase fluid.

Подробнее
Номер записи: 69
20-02-2020 дата публикации

Cryogenic combined cycle power plant

Номер: US20200056511A1
Автор: William M. Conlon
Принадлежит: Individual

In a cryogenic combined cycle power plant electric power drives a cryogenic refrigerator to store energy by cooling air to a liquid state for storage within tanks, followed by subsequent release of the stored energy by first pressurizing the liquid air, then regasifying the liquid air and raising the temperature of the regasified air at least in part with heat exhausted from a combustion turbine, and then expanding the heated regasified air through a hot gas expander to generate power. The expanded regasified air exhausted from the expander may be used to cool and make denser the inlet air to the combustion turbine. The combustion turbine exhaust gases may be used to drive an organic Rankine bottoming cycle. An alternative source of heat such as thermal storage, for example, may be used in place of or in addition to the combustion turbine.

Подробнее
Номер записи: 70
17-03-2022 дата публикации

METHOD AND FILLING DEVICE FOR FILLING A TRANSPORT TANK

Номер: US20220082210A1
Автор: DECKER Lutz, KNOCHE Martin, Müller René
Принадлежит:

The present invention pertains to a method for filling a transport tank with a product medium in a liquid state in a gas liquefaction plant, comprising a step of supplying the product medium in the liquid state from a storage tank () of the gas liquefaction plant to the transport tank. The method is characterized in that it further comprises a step of discharging the product medium in a gaseous state from the transport tank into the storage tank (). 1. Method for filling a transport tank with a product medium in a liquid state in a gas liquefaction plant , comprising a step of supplying the product medium in the liquid state from a storage tank of the gas liquefaction plant to the transport tank , whereinthe method further comprises a step of discharging the product medium in a gaseous state from the transport tank to the storage tank.2. Method according to claim 1 , wherein the product medium in the gaseous state stored in the transport tank is fed into the storage tank downstream of a cooling and liquefying unit of the gas liquefaction plant which generates a liquid product medium stream to be supplied to the storage tank.3. Method according to claim 1 , wherein the product medium in the gaseous state stored in the transport tank is fed into the storage tank in its gaseous state.4. Method according to claim 1 , wherein the storage tank stores the product medium in both a liquid and a gaseous phase claim 1 , and the product medium in the gaseous state is discharged from the transport tank into the storage tank such that the product medium in the gaseous state is fed into the liquid phase.5. Method according to claim 1 , wherein the product medium in the gaseous state supplied to the storage tank from the transport tank is fed into a static mixer provided in or upstream of the storage tank.6. Method according to claim 1 , wherein the product medium in its gaseous state discharged from the transport tank is fed into a feed gas stream which claim 1 , upon flowing ...

Подробнее
Номер записи: 71
11-03-2021 дата публикации

SYSTEM AND METHOD OF RECOVERING CARBON DIOXIDE FROM AN EXHAUST GAS STREAM

Номер: US20210069632A1
Автор: DiPietro Joseph Philip, Hofer Douglas Carl
Принадлежит: AIR PRODUCTS AND CHEMICALS, INC.

A carbon dioxide capture system includes a first heat exchanger configured to exchange heat between an exhaust stream and a lean carbon dioxide effluent stream. The carbon dioxide capture system also includes a first turboexpander including a first compressor driven by a first turbine. The first compressor is coupled in flow communication with the first heat exchanger. The first turbine is coupled in flow communication with the first heat exchanger and configured to expand the lean carbon dioxide effluent stream. The carbon dioxide capture system further includes a carbon dioxide membrane unit coupled in flow communication with the first compressor. The carbon dioxide membrane unit is configured to separate the exhaust stream into the lean carbon dioxide effluent stream and a rich carbon dioxide effluent stream. The carbon dioxide membrane unit is further configured to channel the lean carbon dioxide effluent stream to the first heat exchanger. 1. A carbon dioxide capture system comprising:a first heat exchanger configured to exchange heat between an exhaust stream and a lean carbon dioxide effluent stream; a compressor coupled in flow communication with said first heat exchanger and configured to compress the exhaust stream; and', 'a turbine coupled in flow communication with said first heat exchanger, said compressor driven by said turbine, said turbine configured to expand the lean carbon dioxide effluent stream; and, 'at least one turboexpander comprisinga carbon dioxide membrane unit coupled in flow communication with said compressor, said carbon dioxide membrane unit configured to separate the exhaust stream into the lean carbon dioxide effluent stream and a rich carbon dioxide effluent stream, said carbon dioxide membrane unit further configured to channel the lean carbon dioxide effluent stream to said first heat exchanger.2. The carbon dioxide capture system in accordance with claim 1 , further comprising a cryogenic separation unit coupled in flow ...

Подробнее
Номер записи: 72
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- ...

Подробнее
Номер записи: 73
27-02-2020 дата публикации

Primary Loop Start-Up Method for a High Pressure Expander Process

Номер: US20200064062A1
Автор: JR. Fritz, LIU Yijun, Nagavarapu Ananda K., Pierre, WRIGHT Xiaoli Y.
Принадлежит:

A method is disclosed for start-up of a system for liquefying a feed gas stream comprising natural gas. The system has a feed gas compression and expansion loop, and a refrigerant system comprising a primary cooling loop and a sub-cooling loop. The feed gas compression and expansion loop is started up. The refrigerant system is pressurized. Circulation in the primary cooling loop is started and established. Circulation in the sub-cooling loop is started and established. A flow rate of the feed gas stream and circulation rates of the primary cooling loop and the sub-cooling loop are ramped up. 1. A method for start-up of a system for liquefying a feed gas stream comprising natural gas , the system having a feed gas compression and expansion loop , and a refrigerant system comprising a primary cooling loop and a sub-cooling loop , the method comprising:(a) starting up the feed gas compression and expansion loop;(b) pressurizing the refrigerant system;(c) starting and establishing circulation in the primary cooling loop;(d) starting and establishing circulation in the sub-cooling loop; and(e) ramping up a flow rate of the feed gas stream and circulation rates of the primary cooling loop and the sub-cooling loop.2. The method of claim 1 , wherein step (a) comprises:a1. providing the feed gas stream to be pressurized within the feed gas compression and expansion loop;a2. starting a feed gas compressor with minimum speed and full recycle through its anti-surge valve, thereby generating a feed gas compressor suction pressure lower than, and a feed gas compressor discharge pressure higher than, a pressure of the feed gas stream in the feed gas compression and expansion loop;a3. gradually permitting circulation of the feed gas stream downstream of the feed gas compressor to be cooled by indirect heat exchange;a4. de-pressurizing and further cooling the compressed, cooled gas stream to produce a chilled gas stream;a5. routing the chilled gas stream to a suction side of the ...

Подробнее
Номер записи: 74
07-03-2019 дата публикации

System and method for recovery of non-condensable gases such as neon, helium, xenon, and krypton from an air separation unit

Номер: US20190072326A1
Автор: Hanfei Tuo, James R. Dray, Maulik R. Shelat, Nick J. Degenstein, Vijayaraghavan S. Chakravarthy
Принадлежит: Praxair Technology Inc

A system and method for recovery of rare gases such as neon, helium, xenon, and krypton in an air separation unit is provided. The rare gas recovery system comprises a non-condensable stripping column linked in a heat transfer relationship with a xenon-krypton column via an auxiliary condenser-reboiler. The non-condensable stripping column produces a rare gas containing overhead that is directed to the auxiliary condenser-reboiler where most of the neon is captured in a non-condensable vent stream that is further processed to produce a crude neon vapor stream that contains greater than about 50% mole fraction of neon with the overall neon recovery exceeding 95%. The xenon-krypton column further receives two streams of liquid oxygen from the lower pressure column and the rare gas containing overhead from the non-condensable stripping column and produces a crude xenon and krypton liquid stream and an oxygen-rich overhead.

Подробнее
Номер записи: 75
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.

Подробнее
Номер записи: 76
05-03-2020 дата публикации

System and Method for Separating Natural Gas Liquid and Nitrogen from Natural Gas Streams

Номер: US20200072547A1
Автор: Butts Rayburn C.
Принадлежит:

A system and method for removing nitrogen and producing a high pressure methane product stream and an NGL product stream from natural gas feed streams where at least 90%, and preferably at least 95%, of the ethane in the feed stream is recovered in the NGL product stream. The system and method of the invention are particularly suitable for use with feed streams in excess of 5 MMSCFD and up to 300 MMSCFD and containing around 5% to 80% nitrogen. The system and method preferably combine use of strategic heat exchange between various process streams with a high pressure rectifier tower and the ability to divert all or a portion of a nitrogen rejection unit feed stream to optionally bypass a nitrogen fractionation column to reduce capital costs and operating expenses. 1. A system for removing nitrogen from a feed stream comprising nitrogen , methane , ethane , and other components to produce a methane product stream , an NGL product stream , and a nitrogen vent stream the system comprising:a first separator wherein the feed stream is separated into a first overhead stream and a first bottoms stream;a first fractionating column wherein the first overhead stream is separated into a second overhead stream and a second bottoms stream;an expander for expanding the first overhead stream prior to the first fractionating column;a second fractionating column wherein the first bottoms stream and second bottoms stream are separated into a third overhead stream and a third bottoms stream;a third fractionating column wherein at least a first NRU feed stream separated into a fourth overhead stream and a fourth bottoms stream;a first heat exchanger for cooling a first portion of the feed stream prior to the first separator and cooling a first portion of the second overhead stream prior to the third fractionating column through heat exchange with the fourth bottoms stream and a recycle refrigerant stream;a second heat exchanger for cooling the first portion of the second overhead ...

Подробнее
Номер записи: 77
22-03-2018 дата публикации

SYSTEM AND METHOD FOR CRYOGENIC PURIFICATION OF A FEED STREAM COMPRISING HYDROGEN, METHANE, NITROGEN AND ARGON

Номер: US20180080708A1
Автор: Howard Henry E.
Принадлежит:

A system and method for cryogenic purification of a hydrogen, nitrogen, methane and argon containing feed stream to produce a methane free, hydrogen and nitrogen containing synthesis gas and a methane rich fuel gas, as well as to recover an argon product stream, excess hydrogen, and excess nitrogen is provided. The disclosed system and method are particularly useful as an integrated cryogenic purifier in an ammonia synthesis process in an ammonia plant. The excess nitrogen is a nitrogen stream substantially free of methane and hydrogen that can be used in other parts of the plant, recovered as a gaseous nitrogen product and/or liquefied to produce a liquid nitrogen product. 1. A method for purifying a hydrogen , nitrogen , methane and argon containing feed stream to produce a hydrogen and nitrogen containing synthesis gas and a methane fuel gas , the method comprising the steps of:conditioning the feed stream to a temperature near saturation at a pressure greater than about 300 psia;directing the conditioned feed stream to a synthesis gas rectification column configured to produce an hydrogen and nitrogen enriched overhead vapor stream and a methane-rich condensed phase stream proximate the bottom of the synthesis gas rectification column;directing the methane-rich condensed phase stream to a hydrogen stripping column configured to strip hydrogen from the methane-rich condensed phase stream and produce a hydrogen free methane bottom stream and a hydrogen enriched gaseous overhead;vaporizing the hydrogen free methane bottom stream to produce a vaporized or partially vaporized hydrogen free methane-rich stream;warming the hydrogen and nitrogen enriched overhead vapor stream via indirect heat exchange with the feed stream to produce the hydrogen and nitrogen containing synthesis gas; andwarming the vaporized or partially vaporized hydrogen free methane-rich stream via indirect heat exchange with the feed stream to produce the methane fuel gas.2. The method of claim 1 , ...

Подробнее
Номер записи: 78
22-03-2018 дата публикации

SYSTEM AND METHOD FOR CRYOGENIC PURIFICATION OF A FEED STREAM COMPRISING HYDROGEN, METHANE, NITROGEN AND ARGON

Номер: US20180080709A1
Автор: Howard Henry E.
Принадлежит:

A system and method for cryogenic purification of a hydrogen, nitrogen, methane and argon containing feed stream to produce a methane free, hydrogen and nitrogen containing synthesis gas and a methane rich fuel gas, as well as to recover an argon product stream, excess hydrogen, and excess nitrogen is provided. The disclosed system and method are particularly useful as an integrated cryogenic purifier in an ammonia synthesis process in an ammonia plant. The excess nitrogen is a nitrogen stream substantially free of methane and hydrogen that can be used in other parts of the plant, recovered as a gaseous nitrogen product and/or liquefied to produce a liquid nitrogen product. 1. A method for purifying a stream comprising hydrogen , nitrogen , methane and argon to produce a hydrogen and nitrogen containing synthesis gas , a methane rich fuel gas , and at least one nitrogen product , the method comprising the steps of:conditioning the pre-purified feed stream to a temperature near saturation at a pressure greater than about 300 psia;directing the conditioned feed stream to a synthesis gas rectification column configured to produce an hydrogen and nitrogen enriched overhead vapor stream and a methane-rich condensed phase stream proximate the bottom of the synthesis gas rectification column;vaporizing the methane-rich condensed phase stream to produce a vaporized or partially vaporized methane-rich stream;directing the vaporized or partially vaporized methane-rich stream and a nitrogen reflux stream to a nitrogen rectification column configured to produce a nitrogen containing overhead vapor stream substantially free of methane, and a methane enriched liquid bottoms stream;warming at least a portion of the nitrogen containing overhead vapor stream via indirect heat exchange with the feed stream to produce a warm gaseous nitrogen stream and directing the warm gaseous nitrogen stream to a nitrogen recovery system to produce the at least one nitrogen product;warming the ...

Подробнее
Номер записи: 79
22-03-2018 дата публикации

SYSTEM AND METHOD FOR CRYOGENIC PURIFICATION OF A FEED STREAM COMPRISING HYDROGEN, METHANE, NITROGEN AND ARGON

Номер: US20180080710A1
Автор: Howard Henry E.
Принадлежит:

A system and method for cryogenic purification of a hydrogen, nitrogen, methane and argon containing feed stream to produce a methane free, hydrogen and nitrogen containing synthesis gas and a methane rich fuel gas, as well as to recover an argon product stream, excess hydrogen, and excess nitrogen is provided. The disclosed system and method are particularly useful as an integrated cryogenic purifier in an ammonia synthesis process in an ammonia plant. The excess nitrogen is a nitrogen stream substantially free of methane and hydrogen that can be used in other parts of the plant, recovered as a gaseous nitrogen product and/or liquefied to produce a liquid nitrogen product. 1. A cryogenic purification system configured for purifying a hydrogen , nitrogen , methane and argon containing feed stream , the system comprising:a synthesis gas rectification column configured to receive the feed stream and produce a hydrogen and nitrogen enriched overhead vapor stream and a methane-rich condensed phase stream proximate the bottom of the synthesis gas rectification column;a hydrogen stripping column configured to receive the methane-rich condensed phase stream from the synthesis gas rectification column, strip hydrogen from the methane-rich condensed phase stream and produce a hydrogen free methane bottom stream and a hydrogen enriched gaseous overhead;a condenser configured to receive the hydrogen free methane bottom stream and a working fluid and to produce a vaporized or partially vaporized hydrogen free methane-rich stream; anda heat exchanger configured to (a) warm the hydrogen and nitrogen enriched overhead vapor stream via indirect heat exchange with the feed stream to produce a hydrogen and nitrogen containing synthesis gas; and (b) to warm the vaporized or partially vaporized hydrogen free methane-rich stream via indirect heat exchange with the feed stream to produce a methane fuel gas.2. The system of claim 1 , further comprising a compressor disposed upstream of ...

Подробнее
Номер записи: 80
23-03-2017 дата публикации

TREATMENT METHOD FOR SEPARATING CARBON DIOXIDE AND HYDROGEN FROM A MIXTURE

Номер: US20170081186A1
Автор: CHAMBRON Nicolas, Dubettier-Grenier Richard, LECLERC Mathieu, MARTY Pascal
Принадлежит: L'Air Liquide, Société Anonyme pour I'Etude et I'Exploitation des Procédés Georges Claude

The invention relates to a method fro treating a mixture in order to separate carbon dioxide and hydrogen from said mixture, in which: i) the mixture is cooled and partially condensed and a first liquid is separated from the rest of the mixture in a first phase separator; ii) a gas from or derived from a gas from the first phase separator is treated in a hydrogen pressure swing adsorption module in order to produce a hydrogen-rich gas and a hydrogen-depleted residual gas; and iii) said hydrogen-depleted residual gas or a gas derived from said depleted gas is cooled and partially condensed and a second liquid is separated from the remaining gas in a second phase separator, separate from the first phase separator, wherein the first and/or second liquid being rich in carbon dioxide. The invention also relates to an installation for implementing such a method. 115-. (canceled)16. A process for treating a mixture for the purpose of separating carbon dioxide and hydrogen from this mixture , the process comprising the steps of:i) cooling and partially condensing the mixture is cooled and then separating a first liquid from the mixture in a first phase separator;ii) treating a gas originating or derived from a top gas from the first phase separator in a pressure swing adsorption module for hydrogen to produce a hydrogen-rich gas and a hydrogen- depleted residual gas; andiii) cooling and partially condensing said hydrogen-depleted residual gas or a gas derived from said hydrogen-depleted gas and then separating a second liquid the remaining gas in a second phase separator that is different from the first phase separator,wherein the first liquid and/or second liquid or a liquid derived from the first liquid and/or second liquid originating from the first phase separator and/or from the second phase separator are rich in carbon dioxide as compared to the mixture,wherein the partial condensations in steps i) and iii) are performed in the same cryogenic unit.17. The process as ...

Подробнее
Номер записи: 81
31-03-2022 дата публикации

Offshore liquefaction process without compression

Номер: US20220099364A1
Автор: Alain Guillard, Michael A. Turney
Принадлежит: LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude

A process for producing liquid oxygen, including an offshore platform the system including cooling a high-pressure nitrogen gas stream in a main heat exchanger, thereby producing a cooled high-pressure nitrogen gas stream, expanding the cooled high-pressure nitrogen gas stream in a turbo-expander, thereby producing a cold low-pressure nitrogen gas stream, warming the cold low-pressure nitrogen gas stream by indirect heat exchange with a high-pressure gaseous oxygen stream, thereby producing a liquefied oxygen stream and a warm low-pressure nitrogen gas stream, wherein, at least a portion of the warm low-pressure nitrogen gas stream is vented to the atmosphere.

Подробнее
Номер записи: 82
12-03-2020 дата публикации

Cryogenic air separation unit with flexible liquid product make

Номер: US20200080773A1
Автор: Hanfei Tuo, Maulik R. Shelat, Nick J. Degenstein, Zhengrong Xu
Принадлежит: Individual

A cryogenic air separation unit that provides flexibility in the production of liquid products is disclosed. The present cryogenic air separation unit and associated operating methods involves the use of a dual nozzle arrangement for the main heat exchanger that allows a turbine air stream draw from the main heat exchanger at different temperatures to provide refrigeration to the cryogenic air separation unit which, in turn, enables different production modes for the various liquid products.

Подробнее
Номер записи: 83
19-06-2014 дата публикации

System for converting gaseous fuel into liquid fuel

Номер: US20140165587A1
Автор: Aaron Foege
Принадлежит: Electro Motive Diesel Inc

A system for converting gaseous fuel into liquid fuel is provided. The system may have a combustor configured to receive a supply of gaseous fuel. The system may also have a gas compressor configured to direct gaseous fuel from the supply into the combustor. The system may also have an air compressor configured to direct compressed air into the combustor, and a turbine in fluid communication with an outlet of the combustor. The turbine may be connected to drive the gas compressor and the air compressor. The system may also have at least one heat exchanger in fluid communication with an outlet of the gas compressor and an outlet of the air compressor. The system may also have at least one expander in fluid communication with an outlet of the at least one heat exchanger. The system may also have a condenser in fluid communication with an outlet of the at least one expander.

Подробнее
Номер записи: 84
25-03-2021 дата публикации

Process for Separating Hydrogen from an Olefin Hydrocarbon Effluent Vapor Stream

Номер: US20210088278A1
Автор: Zhao James, Zhao Shukui
Принадлежит: EnFlex, Inc.

One or more specific embodiments disclosed herein includes a method for separating hydrogen from an olefin hydrocarbon rich compressed effluent vapor stream, employing a single heat exchanger, multiple gas-liquid separators, multiple expander/compressor sets, and a rectifier attached to a liquid product drum. 1. A process for the separation of hydrogen from an olefin hydrocarbon rich compressed effluent vapor stream from a dehydrogenation unit , which process comprises:a. cooling a compressed effluent vapor stream in a heat exchanger, wherein the heat exchanger comprises a warm section and a cold section;b. separating hydrogen from olefin and heavy paraffinic components in the cooled compressed effluent vapor stream in a first separator to provide a first vapor stream and a first liquid stream;c. cooling the first vapor stream in the heat exchanger;d. separating hydrogen from olefin and heavy paraffinic components in the cooled first vapor stream in a second separator to provide a second vapor stream and a second liquid stream;e. warming the second vapor stream in the heat exchanger;f. isentropically expanding, in a high-pressure expander, the second vapor stream, wherein the pressure and temperature of the second vapor stream are lowered;g. warming the second vapor stream in the heat exchanger;h. compressing, in a high-pressure compressor, the second vapor stream;i. cooling the second vapor stream in a first discharge cooler;j. dividing the second vapor stream into a gas product and a split stream;k. withdrawing a gas product;l. compressing, in a low-pressure compressor, the split stream;m. cooling the split stream in a second discharge cooler and further cooling the split stream in the heat exchanger;n. isentropically expanding, in a low-pressure expander, the split stream, wherein the pressure and temperature of the split stream are lowered;o. cooling a liquid paraffinic stream in the heat exchanger;p. combining the cooled liquid paraffinic stream with the ...

Подробнее
Номер записи: 85
29-03-2018 дата публикации

Mixed Refrigerant Cooling Process and System

Номер: US20180087832A1
Автор: Brostow Adam Adrian, Krishnamurthy Gowri, Roberts Mark Julian
Принадлежит: AIR PRODUCTS AND CHEMICALS, INC.

The present invention relates to methods of increasing the operability, capacity, and efficiency of natural gas liquefaction processes, with a focus on mixed refrigerant cycles. The present invention also relates to natural gas liquefaction systems in which the above-mentioned methods can be carried out. More specifically, a refrigerant used in a pre-cooling heat exchanger of a natural gas liquefaction plant is withdrawn from the pre-cooling heat exchanger, separated into liquid and vapor streams in a liquid-vapor separator after being cooled and compressed. The vapor portion is further compressed, cooled, and fully condensed, then returned to the liquid-vapor separator. Optionally, the fully condensed stream may be circulated through a heat exchanger before being returned to the liquid-vapor separator for the purpose of cooling other streams, including the liquid stream from the liquid-vapor separator. 1. A method of cooling a hydrocarbon feed stream by indirect heat exchange with a first refrigerant stream in a cooling heat exchanger wherein the method comprises:a) compressing a warm low pressure first refrigerant stream in one or more compression stages to produce a compressed first refrigerant stream;b) cooling the compressed first refrigerant stream in one or more cooling units to produce a compressed cooled first refrigerant stream;c) introducing the compressed cooled first refrigerant stream into a first vapor-liquid separation device to produce a first vapor refrigerant stream and a first liquid refrigerant stream;d) introducing the first liquid refrigerant stream into the cooling heat exchanger;e) cooling the first liquid refrigerant stream in the cooling heat exchanger to produce a cooled liquid refrigerant stream;f) expanding the cooled liquid refrigerant stream to produce a cold refrigerant stream, introducing the cold refrigerant stream into the cooling heat exchanger to provide refrigeration duty required to cool the hydrocarbon feed stream, the first ...

Подробнее
Номер записи: 86
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 ...

Подробнее
Номер записи: 87
19-06-2014 дата публикации

Integrated processes and systems for conversion of methane to multiple higher hydrocarbon products

Номер: US20140171707A1
Автор: Ajay Madgavkar, Benjamin SAYDAH, Erik C. Scher, Greg Nyce, Joel HERGER, Lawrence PECK, Rahul Iyer, Samuel Weinberger
Принадлежит: Siluria Technologies Inc

Integrated systems are provided for the production of higher hydrocarbon compositions, for example liquid hydrocarbon compositions, from methane using an oxidative coupling of methane system to convert methane to ethylene, followed by conversion of ethylene to selectable higher hydrocarbon products. Integrated systems and processes are provided that process methane through to these higher hydrocarbon products.

Подробнее
Номер записи: 88
19-03-2020 дата публикации

PLANT AND METHOD FOR GENERATION OF SYNTHESIS GAS

Номер: US20200087143A1
Автор: Bonne Frederic, BOUET Camille, CHAUBET Lucie, Schlichting Holger, WAGNER Marc
Принадлежит: L'Air Liquide, Societe Anonyme pour I'Etude et I'Exploitation des Procedes Georges Claude

Method and plant for generation of synthesis gas, comprising the steps of air fractionation to give oxygen, nitrogen and tail gas, gasification of a hydrocarbonaceous fuel to give crude synthesis gas and cleaning of the crude synthesis gas by removal of acid gas by means of cryogenic absorption, wherein the absorbent is cooled by means of a compression coolant circuit and the cooling water used is cooled by evaporative cooling by means of the tail gas obtained in the air fractionation. 13-. (canceled)4. A method of generating a synthesis gas which consists essentially of carbon monoxide and hydrogen and has been purified of acid gases , proceeding from a hydrocarbonaceous fuel , and also air and steam , the method comprising the steps of:a) fractionating air by low-temperature rectification to give an oxygen stream, a tail gas stream and a nitrogen stream, wherein the tail gas stream and the nitrogen stream are at ambient temperature and the nitrogen stream is at elevated pressure;b) converting a hydrocarbonaceous fuel at elevated pressure and elevated temperature with the oxygen stream generated in step a) and the steam to a synthesis gas;c) removing the acid gases from the synthesis gas generated in step b) by low-temperature absorption in an absorption column with a liquid absorbent;d) cooling the absorbent used in step c) to the low temperature needed for the low-temperature absorption by means of a compression refrigeration plant, wherein the compression refrigeration plant comprises a coolant circuit in which the coolant is compressed and hence heated and is cooled and condensed by subsequent heat exchange with cooling water; ande) cooling the cooling water before it exchanges heat with the coolant in step d) by evaporative cooling,wherein the evaporative cooling in step e) is conducted with the tail gas stream generated in step a) and/or, after the tail gas stream has been expanded, with the nitrogen stream generated in step a).5. Method according to claim 4 ...

Подробнее
Номер записи: 89
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 ...

Подробнее
Номер записи: 90
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.

Подробнее
Номер записи: 91
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 ...

Подробнее
Номер записи: 92
12-04-2018 дата публикации

MULTIPLE PRESSURE MIXED REFRIGERANT COOLING PROCESS AND SYSTEM

Номер: US20180100694A1
Автор: Krishnamurthy Gowri, Roberts Mark Julian
Принадлежит: AIR PRODUCTS AND CHEMICALS, INC.

Systems and methods described for increasing capacity and efficiency of natural gas liquefaction processes having a mixed refrigerant precooling system with multiple pressure levels comprisingcooling the compressed mixed refrigerant stream and separating the cooled compressed mixed refrigerant stream into a vapor and liquid portion. The liquid portion provides refrigeration duty to a first precooling heat exchanger. The vapor portion is further compressed, cooled, and condensed, and used to provide refrigeration duty to a second precooling heat exchanger. Optionally additional precooling heat exchangers, and/or phase separators may be used. 1. A method of cooling a hydrocarbon feed stream comprising a hydrocarbon fluid and a second refrigerant feed stream comprising a second refrigerant by indirect heat exchange with a first refrigerant in each of a plurality of heat exchange sections , wherein the method comprises:(a) introducing the hydrocarbon feed stream and the second refrigerant feed stream into a warmest heat exchange section of the plurality of heat exchange sections;(b) cooling the hydrocarbon feed stream and the second refrigerant feed stream in each of the plurality of heat exchange sections to produce a precooled hydrocarbon stream and a precooled second refrigerant stream;(c) further cooling and liquefying the precooled hydrocarbon stream in a main heat exchanger against the second refrigerant to produce a liquefied hydrocarbon stream;(d) withdrawing a low pressure first refrigerant stream from a coldest heat exchange section of the plurality of heat exchange sections and compressing the low pressure first refrigerant stream in at least one compression stage of a compression system;(e) withdrawing a medium pressure first refrigerant stream from a first heat exchange section of the plurality of heat exchange sections, the first heat exchange section being warmer than the coldest heat exchange section;(f) combining the low pressure first refrigerant ...

Подробнее
Номер записи: 93
12-04-2018 дата публикации

FACILITY AND METHOD FOR PRODUCING LIQUID HELIUM

Номер: US20180100696A1
Автор: ALI SAID Rawia, Bernhardt Jean-Marc, Demolliens Bertrand, Hernandez Antoine, Peyron Jean-Marc, PICHOT Delphine, Tsevery Jean-Marc
Принадлежит: L'Air Liquide, Societe Anonyme pour I'Etude et I'Exploitation des Procedes Georges Claude

The invention relates to a facility for producing liquid helium from a source gas mixture substantially comprising nitrogen and helium. The facility includes a cryogenic purifier including a system for separating the nitrogen from the source gas mixture with a view to producing helium at a temperature lower than the temperature of the source gas. The facility also includes a helium liquefier that subjects the helium to a work cycle including, in series: compressing the helium, cooling and decompressing the compressed helium, and reheating the cooled, decompressed helium. The facility includes a helium transfer pipe connecting an outlet of the purifier to an inlet of the liquefier in order to transfer helium produced by the purifier into the work cycle of the liquefier. The facility is characterized in that the cryogenic purifier includes a decompression system that includes an inlet to be connected to a source of pressurized nitrogen gas. Said system for decompressing the nitrogen gas exchanges heat with the separation system in order to transfer cold from the decompressed nitrogen gas to said separation system. 110-. (canceled)11. A facility for producing liquid helium from a source gas mixture comprising nitrogen and helium , the facility comprising:a cryogenic purifier comprising a circuit for separating nitrogen from the source gas mixture with a view to producing helium at a temperature below a temperature of the source gas;a helium liquefier that subjects the helium to a work cycle comprising in series:a compression of the helium, a cooling and an expansion of the compressed helium and a reheating of the cooled and expanded helium; and the cryogenic purifier further comprises an expansion circuit that comprises an inlet intended to be connected to a source of pressurized gaseous nitrogen;', 'the circuit for expanding the gaseous nitrogen is in heat exchange with the separation circuit in order to transfer frigories from the expanded gaseous nitrogen to said ...

Подробнее
Номер записи: 94
04-04-2019 дата публикации

Natural Gas Liquefaction by a High Pressure Expansion Process

Номер: US20190101327A1
Автор: JR. Fritz, Pierre
Принадлежит:

A method and system for liquefying a methane-rich high-pressure feed gas stream using a system having first and second heat exchanger zones and a compressed refrigerant stream. The compressed refrigerant stream is cooled and directed to the second heat exchanger zone to additionally cool it below ambient temperature. It is then expanded and passed through the first heat exchanger zone such that it has a temperature that is cooler, by at least 5° F., than the highest fluid temperature within the first heat exchanger zone. The feed gas stream is passed through the first heat exchanger zone to cool at least part of it by indirect heat exchange with the refrigerant stream, thereby forming a liquefied gas stream. At least a portion of the first warm refrigerant stream is directed to the second heat exchanger zone to cool the refrigerant stream, which is compressed. 1. A method for liquefying a feed gas stream rich in methane using a system having first and second heat exchanger zones , where the method comprises:(a) providing the feed gas stream at a pressure less than 1,200 psia;(b) providing a compressed refrigerant stream with a pressure greater than or equal to 1,500 psia;(c) cooling the compressed refrigerant stream by indirect heat exchange with an ambient temperature air or water, to produce a compressed, cooled refrigerant stream;(d) directing the compressed, cooled refrigerant stream to the second heat exchanger zone to additionally cool the compressed, cooled refrigerant stream below ambient temperature to produce a compressed, additionally cooled refrigerant stream;(e) expanding the compressed, additionally cooled refrigerant stream in at least one work producing expander, thereby producing an expanded, cooled refrigerant stream;(f) passing the expanded, cooled refrigerant stream through the first heat exchanger zone to form a first warm refrigerant stream, wherein the first warm refrigerant stream has a temperature that is cooler, by at least 5° F., than the ...

Подробнее
Номер записи: 95
04-04-2019 дата публикации

Natural Gas Liquefaction by a High Pressure Expansion Process

Номер: US20190101328A1
Автор: JR. Fritz, Pierre
Принадлежит:

A method and system for liquefying a methane-rich high-pressure feed gas stream using a first heat exchanger zone and a second heat exchanger zone. The feed gas stream is mixed with a refrigerant stream to form a second gas stream, which is compressed, cooled, and directed to a second heat exchanger zone to be additionally cooled below ambient temperature. It is then expanded to a pressure less than 2,000 psia and no greater than the pressure to which the second gas stream was compressed, and then separated into a first expanded refrigerant stream and a chilled gas stream. The first expanded refrigerant stream is expanded and then passed through the first heat exchanger zone such that it has a temperature that is cooler, by at least 5° F., than the highest fluid temperature within the first heat exchanger zone. 1. A method for liquefying a feed gas stream rich in methane using a first heat exchanger zone and a second heat exchanger zone , where the method comprises:(a) providing the feed gas stream at a pressure less than 1,200 psia;(b) providing a refrigerant stream at near the same pressure of the feed gas stream;(c) mixing the feed gas stream with the refrigerant stream to form a second gas stream;(d) compressing the second gas stream to a pressure of at least 1,500 psia to form a compressed second gas stream;(e) cooling the compressed second gas stream by indirect heat exchange with ambient temperature air or water, to form a compressed, cooled second gas stream;(f) directing the compressed, cooled second gas stream to a second heat exchanger zone, to additionally cool the compressed, cooled second gas stream below ambient temperature, thereby producing a compressed, additionally cooled second gas stream;(g) expanding the compressed, additionally cooled second gas stream in at least one work producing expander to a pressure that is less than 2,000 psia and no greater than the pressure to which the second gas stream was compressed, to thereby form an expanded, ...

Подробнее
Номер записи: 96
02-06-2022 дата публикации

METHOD AND SYSTEM FOR CONDENSING A GAS

Номер: US20220170695A1
Автор: BAUER Heinz, Kamann Martin, KAMMERMAIER Friderike
Принадлежит:

The invention relates to a method for condensing a gas, wherein the gas is subjected to cooling in indirect heat exchange with a refrigerant and at least part of the refrigerant is subjected, after the heat exchange with the gas, to compression by means of a drive (GT) that produces waste heat and to a partial or complete condensing process. After the partial or complete condensing process, a first portion of the refrigerant is subjected to the heat exchange with the gas and a second portion of the refrigerant is subjected, in succession, to pressurization, heating by means of the waste heat of the drive (GT) and work-performing expansion and thereafter is fed back to the partial or complete condensing process. The invention further relates to a corresponding system. 1. A method for condensing a gas , wherein the gas is subjected to cooling in indirect heat exchange with a refrigerant , and at least a part of the refrigerant is subjected , after the heat exchange with the gas , to compression using a drive that produces waste heat and to a partial or complete condensing process , wherein , after the partial or complete condensing process , a first portion of the refrigerant is subjected to the heat exchange with the gas , and that a second portion of the refrigerant is subjected , in succession , to pressurization , heating using the waste heat of the drive and to work-performing expansion , and thereafter is fed back to the partial or complete condensing process.2. The method according to claim 1 , with which a mixed refrigerant is used as the refrigerant in one or more mixed refrigerant circuits and/or with which natural gas or a gas mixture formed using natural gas is used as the gas and/or with which a gas turbine is used as the drive that produces waste heat.3. The method according to claim 1 , with which work performed during the work-performing expansion is used in addition to the drive in the compression of the same refrigerant.4. The method according to ...

Подробнее
Номер записи: 97
29-04-2021 дата публикации

METHOD AND APPARATUS FOR SEPARATING AIR BY CRYOGENIC DISTILLATION

Номер: US20210123671A1
Автор: Demolliens Bertrand, Le Bot Patrick
Принадлежит: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

In a method for separating air by cryogenic distillation, cooled air purified to remove water is sent to a first column operating at a first pressure, where it is separated into a nitrogen-enriched gas as an oxygen-enriched liquid; a gas enriched in argon relative to the air is withdrawn from the second column; at least a portion of the oxygen-enriched liquid is vaporized by heat exchange with the argon-enriched gas; and the vaporized, oxygen-enriched liquid is sent to an intermediate level of the second column. 1. A method for separating air by cryogenic distillation , the method comprising the steps of:(a) sending a cooled air that has previous been purified to remove water to a first column operating at a first pressure, where the cooled air is separated into a nitrogen-enriched gas and an oxygen-enriched liquid;(b) withdrawing a liquid enriched in nitrogen relative to the air from the first column and sending said liquid enriched in nitrogen to the top of a second column that is connected thermally to the first column and operates at a second pressure, wherein the second pressure is lower than the first pressure;(c) withdrawing a liquid enriched in oxygen relative to the air from the first column;(d) withdrawing a gas enriched in argon relative to the air from the second column;(e) at least partially vaporizing at least a portion of the oxygen-enriched liquid by heat exchange with the argon-enriched gas to form a vaporized oxygen-enriched fluid, and then sending the vaporized oxygen-enriched fluid to an intermediate level of the second column;(f) returning at least one condensed portion of the argon-enriched gas to a third column, wherein the third column is also fed with an argon-enriched gas flow originating from the second column, wherein an argon-enriched top gas is withdrawn at a top portion of the third column, and an argon-depleted liquid is returned from the third column to the second column;(g) sending a portion of the oxygen-enriched liquid to an ...

Подробнее
Номер записи: 98
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 ...

Подробнее
Номер записи: 99
27-04-2017 дата публикации

LIQUEFIED GAS TREATMENT SYSTEM

Номер: US20170114960A1
Автор: LEE Jin Kwang, Lee Sang Bong
Принадлежит:

The present invention relates to a liquefied gas treatment system in which a nitrogen control unit controls a content of nitrogen in a boil-off gas or a flash gas when a ratio of a nitrogen component of the flash gas is equal to or greater than a preset value. The efficiency of a boil-off gas compressor can be improved and the system can be stabilized by means of the nitrogen control unit. 1. A liquefied gas treatment system comprising:a boil-off gas compressor configured to pressurize boil-off gas supplied from a liquefied gas storage tank;a boil-off gas liquefier configured to liquefy at least a portion of the boil-off gas pressurized by the boil-off gas compressor,a vapor-liquid separator configured to separate flash gas from the boil-off gas liquefied by the boil-off gas liquefier and mix at least a portion of the flash gas with the boil-off gas; anda nitrogen control unit configured to control a content of nitrogen in the boil-off gas or the flash gas, when a ratio of a nitrogen component of the flash gas is equal to or greater than a preset value.2. The liquefied gas treatment system of claim 1 , further comprising a boil-off gas heat exchanger configured to exchange heat between the boil-off gas pressurized by the boil-off gas compressor and the boil-off gas supplied from the liquefied gas storage tank.3. The liquefied gas treatment system of claim 2 , further comprising a flash gas heat exchanger configured to exchange heat between the boil-off gas pressurized by the boil-off gas compressor and the flash gas claim 2 ,wherein the nitrogen control unit includes:a detector configured to analyze and detect components of the flash gas generated from the vapor-liquid separator,a distributor configured to distribute flow of the flash gas to allow at least a portion of the flash gas to be joined with the boil-off gas introduced into the boil-off gas compressor; anda nitrogen composition controller configured to control an operation of the distributor by checking ...

Подробнее
Номер записи: 100