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 5501. Отображено 100.
13-03-2019 дата публикации

Установка частичного сжижения природного газа

Номер: RU0000187598U1
Автор: Александр Евгеньевич Сычков, Алексей Николаевич Паркин, Борис Давыдович Краковский, Вадим Николаевич Удут, Олег Максимович Попов
Принадлежит: Открытое акционерное общество "Научно-производственное объединение "ГЕЛИЙМАШ" (ОАО "НПО "ГЕЛИЙМАШ")

В предложенной установке для частичного сжижения природного газа, включающей источник газа высокого давления, блок осушки, расширительное устройство, выполненное в виде турбодетандера, в котором в качестве тормоза на одном валу установлен турбокомпрессор, блок очистки от СО 2 , теплообменник для предварительного охлаждения, основной теплообменник, сборник-сепаратор сжиженного газа. Осушенный поток разделяется на два - технологический и дополнительный, который направляется в блок очистки от СО 2 . После очистки от СО 2 из дополнительного потока выделяется продукционный поток, а оставшаяся часть подмешивается к технологическому потоку и понижает концентрацию СО 2 в сжимаемом потоке до значений, которые гарантируют невыпадение твердого СО 2 в проточной части турбинного модуля, что позволяет повысить надежность и эффективность работы всей установки сжижения природного газа. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 187 598 U1 (51) МПК F25J 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК F25J 1/0022 (2018.08) (21)(22) Заявка: 2017144255, 18.12.2017 (24) Дата начала отсчета срока действия патента: Дата регистрации: 13.03.2019 (45) Опубликовано: 13.03.2019 Бюл. № 8 Адрес для переписки: 115280, Москва, ул. Автозаводская, 25, ОАО "НПО "ГЕЛИЙМАШ" (73) Патентообладатель(и): Открытое акционерное общество "Научно-производственное объединение "ГЕЛИЙМАШ" (ОАО "НПО "ГЕЛИЙМАШ") (RU) (56) Список документов, цитированных в отчете о поиске: RU 2541360 C1, 10.02.2015. RU предварительного охлаждения, основной теплообменник, сборник-сепаратор сжиженного газа. Осушенный поток разделяется на два технологический и дополнительный, который R U 1 8 7 5 9 8 (54) Установка частичного сжижения природного газа (57) Реферат: В предложенной установке для частичного сжижения природного газа, включающей источник газа высокого давления, блок осушки, расширительное устройство, выполненное в виде турбодетандера, в котором в качестве тормоза ...

Подробнее
Номер записи: 1
23-02-2012 дата публикации

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

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

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

Подробнее
Номер записи: 2
15-03-2012 дата публикации

Method for separating off nitrogen and hydrogen from natural gas

Номер: US20120060554A1
Автор: Hans Schmidt
Принадлежит: Linde GmbH

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

Подробнее
Номер записи: 3
05-04-2012 дата публикации

Removal of hydrogen

Номер: US20120079849A1
Автор: Hans Schmidt
Принадлежит: Linde GmbH

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

Подробнее
Номер записи: 4
19-04-2012 дата публикации

Configurations and Methods of Heating Value Control in LNG Liquefaction Plant

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

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

Подробнее
Номер записи: 5
03-05-2012 дата публикации

Sublimation systems and associated methods

Номер: US20120103012A1
Автор: Bruce M. Wilding, Michael G. Mckellar, Terry D. Turner
Принадлежит: Battelle Energy Alliance Llc

A system for vaporizing and sublimating a slurry comprising a fluid including solid particles therein. The system includes a first heat exchanger configured to receive the fluid including solid particles and vaporize the fluid and a second heat exchanger configured to receive the vaporized fluid and solid particles and sublimate the solid particles. A method for vaporizing and sublimating a fluid including solid particles therein is also disclosed. The method includes feeding the fluid including solid particles to a first heat exchanger, vaporizing the fluid, feeding the vaporized fluid and solid particles to a second heat exchanger and sublimating the solid particles. In some embodiments the fluid including solid particles is liquid natural gas or methane including solid carbon dioxide particles.

Подробнее
Номер записи: 6
05-07-2012 дата публикации

Method to maximize lng plant capacity in all seasons

Номер: US20120167619A1
Автор: Robert C. HAVLIK, Stanley H. HUANG
Принадлежит: Chevron USA Inc

As described herein, a method and system for operating a liquefied natural gas (LNG) plant are provided. The method and system also provide for domestic natural gas production. In the present methods and systems, substantially all of the natural gas produced from a well or formation is processed to form LNG; a portion of the LNG produced is regasified; and the regasification is utilized to cool the inlet air to the gas turbines in the LNG plant, either directly or indirectly.

Подробнее
Номер записи: 7
04-10-2012 дата публикации

Heat exchanger system

Номер: US20120247147A1
Автор: Christiane Kerber, Jürgen Spreemann, Manfred Steinbauer, Markus Hammerdinger, Norbert Reiter
Принадлежит: Linde GmbH

The invention relates to a heat exchanger system ( 1 ) for heat exchange between at least a first medium (M), in particular in the form of a hydrocarbon-rich phase, and a second medium (K), with at least first and second pipe space sections ( 101, 103; 103, 105 ) for accommodating the first medium (M), and with a first pipe space section connecting means ( 102; 104 ), via which the two pipe space sections ( 101, 103; 103, 105 ) are connected to one another in a flow-guiding manner. The first pipe space section ( 101; 103 ) is surrounded by a first shell space ( 201, 203 ), and the second pipe space section ( 103; 105 ) is surrounded by a second shell space ( 203, 205 ) for accommodating the second medium (K). The first shell space ( 201; 203 ) is defined by a first shell ( 301; 303 ) and the second shell space ( 203; 205 ) is defined by a second shell ( 303; 305 ).

Подробнее
Номер записи: 8
10-01-2013 дата публикации

Refrigeration process

Номер: US20130008204A1
Автор: Jin-Kuk Kim, Xuesong Zheng
Принадлежит: University of Manchester

The present invention relates to a single cycle mixed refrigerant process for industrial cooling applications, for example, the liquefaction of natural gas. The present invention also relates to a refrigeration assembly configured to implement the processes defined herein and a mixed refrigerant composition usable in such processes.

Подробнее
Номер записи: 9
14-03-2013 дата публикации

Cooling system

Номер: US20130061607A1
Автор: Andres Kundig
Принадлежит: Linde GmbH

The invention relates to a cooling system for cooling a refrigeration consumer (K) that has a single-stage or multi-stage compressor to compress refrigerant circulating in the cooling system, at least one heat exchanger to cool the refrigerant, and at least one expansion turbine to expand the refrigerant in a way that gives off cold. A storage device that serves to store liquid refrigerant is assigned to the cooling system, or a storage device is integrated into the cooling system, in such a way that at least temporarily, liquid refrigerant can be fed into the cooling circuit from the storage device.

Подробнее
Номер записи: 10
21-03-2013 дата публикации

Gas Expansion Cooling Method

Номер: US20130072740A1
Автор: Brandon Paul HILLMAN
Принадлежит: Individual

A gas expansion cooling method for reducing hydrocarbon emissions includes feeding a high pressure cooling gas through a valve, decreasing a temperature of the cooling gas by decreasing its pressure; feeding the cooling gas into a heat exchanger; and diverting a hydrocarbon gas into the heat exchanger such that the cooling gas decreases a temperature of the hydrocarbon gas. The cooling gas may be drawn from a preexisting high pressure gas system that serves a purpose other than supplying a coolant for the gas expansion cooling system. A portion of the hydrocarbon gas may be condensed in the heat exchanger to form a hydrocarbon liquid, which may be separated from the hydrocarbon gas in a separation vessel. The hydrocarbon liquid may be recovered, while the hydrocarbon gas may be fed to a ventilation system.

Подробнее
Номер записи: 11
28-03-2013 дата публикации

Method of operating a gas turbine and gas turbine

Номер: US20130074511A1
Автор: Edwin Snoeks, Irina Tanaeva
Принадлежит: Individual

A gas turbine system comprises a gas turbine having a low pressure compression stage and a high pressure compression stage, a combustion chamber, and an expansion stage connected to the combustion chamber. The low pressure compression stage and the high pressure compression stage are connected with each other via an intercooling stage, wherein the low pressure compressed air stream from the low pressure compression stage is chilled to an intercooling temperature that is lower than the ambient temperature of the air source from which the air stream was supplied to the low pressure compression stage of the gas turbine.

Подробнее
Номер записи: 12
25-04-2013 дата публикации

METHOD OF TREATING A HYDROCARBON STREAM COMPRISING METHANE, AND AN APPARATUS THEREFOR

Номер: US20130098103A1
Автор: Buijs Cornelis, Chantant Francois
Принадлежит: Shell Internationale Research Maatschappij B.V.

In a method and apparatus for treating a hydrocarbon stream having methane, at least a part of the hydrocarbon stream and a main refrigerant stream are cooled by indirect heat exchanging against a pre-cooling refrigerant. The pre-cooled hydrocarbon stream is passed to a first inlet of an extraction column, and an effluent stream is discharged from the extraction column. The effluent stream and at least a part of the pre-cooled main refrigerant stream are passed to a further heat exchanger, where they are both cooled thereby providing a cooled methane-enriched hydrocarbon stream and at least one cooled main refrigerant stream. The passing of the effluent stream to the further heat exchanger and the passing of the pre-cooled hydrocarbon stream to the first inlet of the extraction column includes indirectly heat exchanging the effluent stream against the pre-cooled hydrocarbon stream. 2. The method according to claim 1 , wherein said indirectly heat exchanging of the effluent stream against the pre-cooled hydrocarbon stream comprises passing the pre-cooled hydrocarbon stream from a first inlet into an extraction column heat exchanger claim 1 , through the extraction column heat exchanger in indirect heat exchanging interaction with the effluent stream claim 1 , to a first outlet from the extraction column heat exchanger claim 1 , and passing the effluent stream from a second inlet into the extraction column heat exchanger claim 1 , through the extraction column heat exchanger in indirect heat exchanging interaction with the pre-cooled hydrocarbon stream claim 1 , to a second outlet from the extraction column heat exchanger.4. The method according to claim 3 , wherein the auxiliary refrigerant stream comprises at least a part of the pre-cooled main refrigerant stream.5. The method according to claim 3 , wherein said passing of the at least part of the pre-cooled main refrigerant stream to the further heat exchanger comprises separating the pre-cooled main refrigerant ...

Подробнее
Номер записи: 13
09-05-2013 дата публикации

Rebalancing a main heat exchanger in a process for liquefying a tube side stream

Номер: US20130111947A1
Автор: Christiane Kerber, Derek William Hodges, Manfred Steinbauer, Markus Hammerdinger
Принадлежит: Linde GmbH

A process for liquefying a tube side stream in a main heat exchanger is described. The process comprises the steps of: a) providing a first mass flow to the warm end of a first subset of individual tubes, b) providing a second mass flow to the warm end of a second subset of individual tubes, c) evaporating a refrigerant stream on the shell side; d) measuring an exit temperature of the first mass flow; e) measuring an exit temperature of the second mass flow; and, f) comparing the exit temperature of the first mass flow measured in step d) to the exit temperature of the second mass flow measured in step e), the process characterized in that at least one of the first and second mass flows is adjusted to equalise the exit temperature of the first mass flow with the exit temperature of the second mass flow.

Подробнее
Номер записи: 14
16-05-2013 дата публикации

SYSTEMS AND METHODS FOR USING MULTIPLE CRYOGENIC HYDRAULIC TURBINES

Номер: US20130119666A1
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:flowing a high-pressure liquid stream through a first plurality of liquid turbines coupled in a first series, wherein, after a first turbine in the series, an inlet of each liquid turbine 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; andbypassing 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.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 pressure, temperature, and flow rate 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;flowing the portion through a second plurality of liquid turbines coupled in a second series, wherein, after a first turbine in the series, an inlet of each liquid turbine is coupled to an outlet of a proceeding liquid turbine; and wherein the second series is in parallel with the first series; andgenerating electricity from the second series by removing energy from the portion of the ...

Подробнее
Номер записи: 15
30-05-2013 дата публикации

NATURAL GAS LIQUEFACTION PROCESS

Номер: US20130133362A1
Автор: Cha Kyu Sang, Choe Kun Hyung, Choi Sung Hee, Lee Chul Gu, Lee Sang Gyu, Lee Yeong Beom, Park Chang Won, Yang Young Myung
Принадлежит:

Disclosed herein is a natural gas liquefaction process using a single refrigeration cycle adopting a mixed refrigerant, and therefore having a simple structure and thus a compact system which is easy to operate, and further, after the mixed refrigerant is separated into two refrigerant parts, the two refrigerant parts are not mixed with each other but go through condensing (cooling), expanding, heat-exchanging, and compressing stages individually, and thus, optimal temperature and pressure conditions are applied to each of the separated refrigerant parts to increase efficiency of the liquefaction process. 1. A natural gas liquefaction process where natural gas is pre-cooled through heat exchange with a refrigerant in a first heat exchange region and the pre-cooled natural gas is liquefied through heat exchange with a refrigerant in a second heat exchange region by using a single closed-loop refrigeration cycle adopting a mixed refrigerant , the closed-loop refrigeration cycle comprising:separating a partially condensed mixed refrigerant into a liquid phase refrigerant part and a gas phase refrigerant part;pre-cooling the natural gas in the first heat exchange region by using the liquid phase refrigerant part;liquefying the pre-cooled natural gas in the second heat exchange region by using the gas phase refrigerant part;firstly compressing the refrigerant part which pre-cools the natural gas through the pre-cooling;secondly compressing the refrigerant part which liquefies the natural gas through the liquefying; andmixing the refrigerant parts respectively compressed through the first compressing and the second compressing,wherein the liquid phase refrigerant part and the gas phase refrigerant part, after being separated through the separating, pass through independent loops without being mixed with each other, and then are mixed with each other in the mixing.2. The natural gas liquefaction process according to claim 1 , wherein the pre-cooling includes: cooling the ...

Подробнее
Номер записи: 16
06-06-2013 дата публикации

SYSTEMS AND METHODS FOR INTEGRATED ENERGY STORAGE AND CRYOGENIC CARBON CAPTURE

Номер: US20130139543A1
Автор: Baxter Larry L.
Принадлежит:

The systems and methods integrate energy storage with cryogenic carbon capture, providing effective grid management and energy-efficient carbon capture capabilities to power plants. The systems store energy during off-peak demand by using off-peak energy to compress natural gas to form liquefied natural gas (LNG) and storing the LNG for use as a refrigerant. The systems use the stored LNG as a refrigerant in a cryogenic carbon capture (CCC) process to isolate carbon dioxide from light gases in a flue gas. The systems supply energy during peak demand by burning the natural gas warmed by the CCC process to generate power. 1. A method for storing electrical or mechanical energy and separating condensable vapors from light gases or liquids , comprising:(i) liquefying at least one gaseous refrigerant using electricity or mechanical energy during off-peak demand;(ii) storing the liquefied refrigerant in liquefied refrigerant storage vessel for later use as a refrigerant;(iii) using the liquefied refrigerant as a refrigerant in a traditional heat exchanger (THE) or desublimating heat exchanger (DHE) during peak demand of energy to cool a mixed process stream comprising at least one condensable vapor and at least one light gas, thereby causing the condensable vapor to condense or desublimate to form or liquid or solid stream; and(iv) separating the liquid or solid stream from the light gas.2. The method as in claim 1 , wherein the gaseous refrigerant comprises natural gas and the liquefied refrigerant comprises liquefied natural gas (LNG).3. The method as in claim 2 , further comprising claim 2 , after liquefying NG claim 2 , pressurizing the LNG so that its boiling point is in the range of 0-20° C. below the lowest design desublimation temperature of the condensable vapor.4. The method as in claim 2 , further comprising claim 2 , after liquefying the natural gas claim 2 , pressurizing the LNG to 2-6 bars.5. The method as in claim 1 , wherein the at least one condensable ...

Подробнее
Номер записи: 17
13-06-2013 дата публикации

"FLEXIBLE LIQUEFIED NATURAL GAS PLANT"

Номер: US20130145794A1
Автор: Brennan Justin, Miller Michael R, Norman Garth M., Rasmussen Chad C.
Принадлежит:

The present techniques are directed to a flexible liquefied natural gas (LNG) plant that may be tied to an external electric grid for importing or exporting electric power. Exemplary embodiments provide a method for producing LNG that includes producing a base load capacity of refrigeration capacity for LNG production from a first compression system. Electricity may be produced from a second compressor string if electricity is needed by an external power grid, or a second amount of refrigeration capacity may be provided by the second compressor string is natural gas feed is available and the external grid does not need power. 1. A method for producing liquefied natural gas (LNG) , comprising:producing a base load refrigeration capacity for LNG production from a first compression system; andproducing electricity from a second compression system, wherein the second compression system is configured to export the electricity to an external power grid when needed.2. The method of claim 1 , further comprising producing a second amount of refrigeration capacity from the second compression system if electricity is not needed by an external power grid and natural gas feed is available.3. The method of claim 2 , comprising producing a third amount of refrigeration capacity from a third compression system if electricity is available from the external power grid and natural gas feed is available.4. The method of claim 3 , wherein the first compression system claim 3 , the second compression system claim 3 , and the third compression system share inlet and outlet manifolds for a refrigerant.5. The method of claim 1 , further comprising increasing compression power in the first compression system by powering a motor/generator from the external power grid claim 1 , wherein the motor/generator is in parallel with a gas turbine coupled to a compressor string.6. The method of claim 1 , further comprising increasing compression power in the second compressor string by powering a motor ...

Подробнее
Номер записи: 18
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: 19
27-06-2013 дата публикации

LIQUEFYING NATURAL GAS IN A MOTION ENVIRONMENT

Номер: US20130160487A1
Автор: DAVIES Paul Raymond, GRAVOIS Shaun Phillip, JAMES Will Taylor
Принадлежит: ConocoPhillips Company

Systems and methods for liquefying natural gas in a motion environment, utilizing a core-in-shell type heat exchanger are provided. 1. A system for cooling or liquefying a process gas in a motion environment , comprising:a. a separation vessel, wherein the separation vessel includes motion suppressing baffles, wherein the separation vessel separates a high pressure refrigerant stream thereby producing a vapor refrigerant stream and a liquid refrigerant stream;b. a vapor liquid refrigerant pipe for delivering the liquid refrigerant stream from the separation vessel to an external heat exchanger core;c. at least one external heat exchanger core, wherein the external heat exchanger core is external to a kettle, wherein the liquid refrigerant stream and a warmer process stream undergo indirect heat exchange in the external heat exchanger core thereby producing a cooled process stream and a vaporized refrigerant stream, wherein the cooled process stream is delivered to a location external to the external heat exchanger core; andd. a partially vaporized refrigerant pipe for delivering the partially vaporized refrigerant from the external heat exchanger core to the separation vessel, wherein the partially vaporized refrigerant pipe provides minimal pressure drop, wherein the partially vaporized refrigerant pipe ensures the thermosiphon effect is maintained.2. The system according to claim 1 , wherein the motion suppressing baffles are horizontally disposed.3. The system according to claim 1 , wherein the motion suppressing baffles are vertically disposed.4. The system according to claim 1 , wherein the motion suppressing baffles are horizontally and vertically disposed.5. A system for chilling or liquefying a process gas in a motion environment claim 1 , comprising:a. a separation vessel, wherein the separation vessel separates a refrigerant stream thereby producing a vapor refrigerant stream and a liquid refrigerant stream;b. a vapor liquid refrigerant pipe for delivering ...

Подробнее
Номер записи: 20
11-07-2013 дата публикации

Liquefaction Method and System

Номер: US20130174603A1
Автор: Brostow Adam Adrian, Roberts Mark Julian
Принадлежит: AIR PRODUCTS AND CHEMICALS, INC.

A method for liquefaction using a closed loop refrigeration system, the method comprising the steps of (a) compressing a gaseous refrigerant stream in at least one compressor; (b) cooling the compressed gaseous refrigerant stream in a first heat exchanger; (c) expanding at least a first portion of the cooled, compressed gaseous refrigerant stream from the first heat exchanger in a first expander to provide a first expanded gaseous refrigerant stream; and (d) cooling and substantially liquefying a feed gas stream to form a substantially liquefied feed gas stream in a second heat exchanger through indirect heat exchange against at least a first portion of the first expanded gaseous refrigerant stream from the first expander, wherein the first expanded gaseous refrigerant stream exiting the first expander is substantially vapor. 148-. (canceled)49. A method of liquefaction using a closed loop refrigeration system , the method comprising the steps of:(a) compressing a gaseous refrigerant stream in at least one compressor;(b) cooling at least a portion of the compressed gaseous refrigerant stream in a first heat exchanger;(c) expanding a first portion of the cooled, compressed gaseous refrigerant stream from the first heat exchanger in a first expander to provide a first expanded gaseous refrigerant stream;(d) cooling and substantially liquefying a feed gas stream to form a substantially liquefied feed gas stream in a second heat exchanger through indirect heat exchange against a first portion of the first expanded gaseous refrigerant stream from the first expander; and(e) further cooling a second portion of the cooled, compressed gaseous refrigerant stream from the first heat exchanger in a third heat exchanger by indirect heat exchange with a second portion of the first expanded gaseous refrigerant stream from the first expander,wherein the first expanded gaseous refrigerant stream exiting the first expander is substantially vapor, andwherein the first heat exchanger ...

Подробнее
Номер записи: 21
01-08-2013 дата публикации

CONFIGURATIONS AND METHODS FOR SMALL SCALE LNG PRODUCTION

Номер: US20130192297A1
Автор: Mak John
Принадлежит:

A small scale natural gas liquefaction plant is integrated with an LNG loading facility in which natural gas is liquefied using a multi-stage gas expansion cycle. LNG is then loaded onto an LNG truck or other LNG transport vehicle at the loading facility using a differential pressure control system that uses compressed boil off gas as a motive force to move the LNG from the LNG storage tank to the LNG truck so as to avoid the use of an LNG pump and associated equipment as well as to avoid venting of boil off vapors into the environment. 1. A small scale LNG plant with integrated loading terminal , comprising:a refrigeration unit comprising a closed refrigeration cycle configured to provide refrigeration content to a natural gas feed in an amount sufficient to produce LNG from the natural gas feed;a LNG storage tank fluidly coupled to the cold box and configured to allow receiving and storing the LNG;a first boil off vapor conduit configured to provide a first boil off vapor from an LNG transporter to the cold box, and from the cold box to the LNG storage tank to thereby allow use of the first boil off vapor as a motive force to move the LNG out of the LNG storage tank;a second boil off vapor conduit configured to provide a second boil off vapor from the LNG storage tank to the cold box, and from the cold box to the natural gas feed; anda compressor that is configured to allow compression of at least one of the first and second boil off vapors.2. The plant of further comprising a differential pressure controller configured to maintain a predetermined pressure differential between the LNG storage tank and the LNG transporter.3. The plant of wherein the differential pressure controller is configured to allow liquefaction operation concurrent with filling operation of the LNG transporter.4. The plant of wherein the predetermined pressure differential is between 10-50 psi.5. The plant of wherein the refrigeration unit further comprises at least 3 exchanger passes that ...

Подробнее
Номер записи: 22
08-08-2013 дата публикации

LIQUEFIED NATURAL GAS PLANT WITH ETHYLENE INDEPENDENT HEAVIES RECOVERY SYSTEM

Номер: US20130199238A1
Автор: EVANS Megan V., MOCK Jon M., PRADERIO Attilio J.
Принадлежит: ConocoPhillips Company

This invention relates to a process and apparatus for liquefying natural gas. In another aspect, the invention concerns a liquefied natural gas (LNG) facility employing an ethylene independent heavies recovery system. 1. A method for liquefaction of natural gas comprising:a) cooling a portion of a natural gas feed stream to produce a cooled natural gas feed stream;b) combining the cooled natural gas feed stream with a compressed reflux stream to form a combined natural gas stream;c) separating the combined natural gas stream into a first lights stream and a first heavies stream;d) expanding the first lights stream to form an expanded first lights stream;e) introducing at least a portion of the first heavies stream and at least a portion of the expanded first lights stream into a heavies removal column to form a heavies-depleted stream and a heavies-rich stream;f) separating at least a portion of the heavies-rich stream into a reflux stream and a heavier stream; andg) compressing the reflux stream into a compressed reflux stream.2. The method of claim 1 , wherein (a)-(g) are carried out in a multi-stage cascade-type liquefied natural gas facility.3. The method of claim 1 , wherein a portion of the natural gas feed stream is cooled via indirect heat exchange with a first refrigerant.4. The method of claim 3 , wherein the first refrigerant comprises predominantly propane or predominantly propylene.5. A method for liquefaction of natural gas comprising:a) cooling a portion of a natural gas feed stream via indirect heat exchange with a first refrigerant to form a cooled natural gas feed stream;b) separating the cooled natural gas feed stream into a first lights stream and a first heavies stream;c) expanding the first lights stream to form an expanded first lights stream;d) separating the expanded first lights stream into a second lights stream and a second heavies stream;e) introducing at least a portion of the first heavies stream, at least a portion of the second ...

Подробнее
Номер записи: 23
29-08-2013 дата публикации

METHOD FOR PRODUCING PRESSURIZED LIQUEFIED NATURAL GAS, AND PRODUCTION SYSTEM USED IN SAME

Номер: US20130219955A1
Автор: CHOI Dong Kyu, Jung Je Heon, LEE Jae Yeol, LEE Jung Han, MOON YOUNG SIK, Yoo Seong Jin, Yu Jin Yeol
Принадлежит: DAEWOO SHIPBUILDING & MARINE ENGINEERING CO., LTD.

A method for producing pressurized liquefied natural gas and a production system therefor are provided. The method for producing pressurized liquefied natural gas includes: performing a dehydration process to remove water from natural gas supplied from a natural gas field, without a process of removing acid gas from the natural gas; and performing a liquefaction process to produce pressurized liquefied natural gas by liquefying the natural gas, which has undergone the dehydration process, at a pressure of 13 to 25 bar and a temperature of −120 to −95° C., without a process of fractionating natural gas liquid (NGL). Accordingly, it is possible to reduce plant construction costs and maintenance expenses and reduce LNG production costs. In addition, it is possible to guarantee high economic profit and reduce payback period in small and medium-sized gas fields, from which economic feasibility could not be ensured by the use of a conventional method. 1. A method for producing pressurized liquefied natural gas , comprising:performing a dehydration process to remove water from natural gas supplied from a natural gas field, without a process of removing acid gas from the natural gas; andperforming a liquefaction process to produce pressurized liquefied natural gas by liquefying the natural gas, which has undergone the dehydration process, at a pressure of 13 to 25 bar and a temperature of −120 to −95° C., without a process of fractionating natural gas liquid (NGL).2. The method according to claim 1 , further comprising:performing a carbon-dioxide removal process to remove carbon dioxide by freezing the carbon dioxide in the liquefaction process, when an amount of the carbon dioxide existing in the natural gas after the dehydration process is 10% or less.3. The method according to claim 1 , further comprising:performing a storing process to store the pressurized liquefied natural gas, which has undergone the liquefaction process, in a storage container having a dual ...

Подробнее
Номер записи: 24
19-09-2013 дата публикации

SUPERCONDUCTING POWER TRANSMISSION SYSTEM

Номер: US20130240236A1
Автор: WATANABE Hirofumi, Yamaguchi Sataro
Принадлежит: CHUBU UNIVERSITY EDUCATIONAL FOUNDATION

In a thermally insulated double pipe, a structure is provided in which an inner pipe may be prevented from being appreciably offset relative to an outer pipe due to thermal contraction. The structure includes an inner pipe , within which a superconducting cable is mounted, an outer pipe within which the inner pipe is housed, with the inner and outer pipes constituting a thermally insulated double pipe, and an inner pipe support member supporting the inner pipe. The inner pipe support member is secured to the inner and outer pipes. 1. A superconducting power transmission system , comprising:a thermally insulated double pipe composed by an inner pipe within which a superconducting cable is installed and by an outer pipe within which the inner pipe is housed; andan inner pipe support member(s) supporting the inner pipe;the inner pipe support member(s) being secured to the inner and outer pipes.2. The superconducting power transmission system according to claim 1 , further comprising:a bellows pipe housed in the outer pipe; the bellows pipe being connected to an end(s) of the inner pipe; the superconducting cable being housed within the inside of the bellows pipe.3. The superconducting power transmission system according to claim 1 , further comprising:an object to be imaged by a camera, with the object being connected to an end part of the superconducting cable within a cryostat;a camera installed at a site thermally insulated from the cryostat; with the camera being configured for imaging the object within the cryostat through a window;a control device that analyzes picture image data of the object acquired by the camera to detect displacement thereof; anda driving device that, on detection of the displacement of the object by the control device, causes movement of the cryostat in its entirety.4. The superconducting power transmission system according to claim 3 , further comprising:an illumination device that illuminates the object.5. The superconducting power ...

Подробнее
Номер записи: 25
26-09-2013 дата публикации

METHOD OF PREPARING A COOLED HYDROCARBON STREAM AND AN APPARATUS THEREFOR

Номер: US20130247610A1
Автор: BALASUNDAR Mohan, DRIEL Adri van, GUPTA Akash, SPAANDER Adriaan
Принадлежит: SHELL OIL COMPANY

A partially condensed hydrocarbon feed stream is sent to a column. An overhead vapour hydrocarbon stream from the column is then partially condensed by indirect heat exchanging against an expanded cooling fluid flowing through a first section of a cold side heat exchanging channel. The cooling fluid consists of a mixed refrigerant composition, and liquid from the expanded cooling fluid is continuously transformed to vapour thereby forming a residual liquid portion of not evaporated expanded cooling fluid. The residual liquid is used to progressively condense the hydrocarbon feed stream to produce the partially condensed hydrocarbon feed stream that is sent to the column, by allowing the hydrocarbon feed stream to lose heat to the residual liquid passing through a second section of the cold side heat exchanging channel. The liquid component that is condensed out of the overhead vapour hydrocarbon stream is used as reflux for the column. 1. A method of preparing a cooled hydrocarbon stream from a hydrocarbon feed stream , comprising: passing the cooling fluid through an expander to provide an expanded cooling fluid,', 'allowing the expanded cooling fluid to progressively evaporate as the expanded cooling fluid flows through a cold side heat exchanging channel, by allowing the expanded cooling fluid to flow through a first section of the cold side heat exchanging channel in contact with a first cold surface of a first heat exchanging fluid barrier whereby liquid from the expanded cooling fluid is continuously transformed to vapour thereby forming a residual liquid portion of not evaporated expanded cooling fluid, and subsequently allowing the residual liquid portion to continue its flow through a second section of the cold side heat exchanging channel in contact with a second cold surface of a second heat exchanging fluid barrier whereby the residual liquid is continuously vaporized,', 'compressing the vapour and the vaporized residual liquid to provide a compressed ...

Подробнее
Номер записи: 26
10-10-2013 дата публикации

NATURAL GAS LIQUEFACTION PROCESS

Номер: US20130263623A1
Автор: Cha Kyu Sang, Chang Ho-Myung, Cho Yong Bum, Choe Kun Hyung, Lee Chul Gu, Lee Sang Gyu, Lee Yeong Beom, Park Chang Won
Принадлежит: KOREA GAS CORPORATION

Disclosed herein is a natural gas liquefaction process of pre-cooling natural gas using a closed loop pre-cooling cycle and liquefying the pre-cooled natural gas using a closed loop liquefying cycle, wherein the closed loop pre-cooling cycle includes first and second pre-cooling cycles in parallel for pre-cooling supplied natural gases together in the same first heat exchange region through the respective pure refrigerants, and the closed loop liquefying cycle includes at least one liquefying cycle for liquefying the pre-cooled natural gas through a mixed refrigerant, the first and second pre-cooling cycles being a closed circuit cooling cycle. 1. A natural gas liquefaction process of pre-cooling natural gas using a closed loop pre-cooling cycle and liquefying the pre-cooled natural gas using a closed loop liquefying cycle , wherein the closed loop pre-cooling cycle includes first and second pre-cooling cycles for pre-cooling supplied natural gases together in the same first heat exchange region through the respective pure refrigerants , and the closed loop liquefying cycle includes at least one liquefying cycle for liquefying the pre-cooled natural gas through a mixed refrigerant , the first and second pre-cooling cycles being a closed circuit cooling cycle.2. The natural gas liquefaction process according to claim 1 , wherein the pure refrigerant of the first pre-cooling cycle is ethane (C2) claim 1 , and the pure refrigerant of the second pre-cooling cycle is butane (C4).3. The natural gas liquefaction process according to claim 1 , wherein the first and second pre-cooling cycles include a step of compressing the pure refrigerant claim 1 , a step of cooling the compressed refrigerant claim 1 , a step of additionally cooling the cooled refrigerant in the first heat exchange region claim 1 , and a step of expanding the additionally cooled refrigerant.4. The natural gas liquefaction process according to claim 1 , wherein the closed loop liquefying cycle includes a ...

Подробнее
Номер записи: 27
10-10-2013 дата публикации

METHOD AND SYSTEM FOR THE SMALL-SCALE PRODUCTION OF LIQUIFIED NATURAL GAS (LNG) AND COLD COMPRESSED NATURAL GAS (CCNG) FROM LOW-PRESSURE NATURAL GAS

Номер: US20130263624A1
Автор: Vandor David
Принадлежит:

A system for the production of LNG from low-pressure feed gas sources, at small production scales and at lower energy input costs. A system for the small-scale production of cold compressed natural gas (CCNG). A method of dispensing natural gas from stored CCNG, comprising: dispensing CCNG from a CCNG storage tank; pumping the CCNG by a cryogenic liquid pump to a pressure suitable for compressed natural gas dispensing and storage in on-vehicle compressed natural gas storage tanks; recovering cold from the CCNG by heat exchange with natural gas feeding the natural gas production plant to replace dispensed product. A system for the storage, transport, and dispensing of natural gas, comprising: means for handling natural gas in a CCNG state where the natural gas is a non-liquid, but is dense-enough to allow for pumping to pressure by a cryogenic liquid pump. 1. A method of producing cold compressed natural gas , comprising:providing a stream of feed gas;compressing the stream of feed gas so the feed gas reaches a pressure of about 700 psia or higher;directing the stream of feed gas through a heat exchanger in a first direction and directing a refrigerant through the heat exchanger in a second direction substantially opposite to the first direction such that the feed gas is cooled to between about −150° F. and about −170° F., thereby converting a first portion of the stream of feed gas to cold compressed natural gas.2. The method of further comprising directing a second portion of the stream of feed gas through a refrigeration production device such that the second portion of the stream of feed gas substantially drops in pressure and forms a low-pressure outflow stream of vapor and liquid.3. The method of further comprising directing the low-pressure outflow stream of vapor and liquid from the refrigeration production device for use as refrigerant in subsequent production of cold compressed natural gas;4. The method of wherein the refrigerant comprises the low-pressure ...

Подробнее
Номер записи: 28
12-12-2013 дата публикации

SEMI-CLOSED LOOP LNG PROCESS

Номер: US20130327085A1
Автор: Eaton Anthony P.
Принадлежит: ConocoPhillips Company

A semi-closed loop system for producing liquefied natural gas (LNG) that combines certain advantages of closed-loop systems with certain advantages of open-loop systems to provide a more efficient and effective hybrid system. In the semi-closed loop system, the final methane refrigeration cycle provides significant cooling of the natural gas stream via indirect heat transfer, as opposed to expansion-type cooling. A minor portion of the LNG product from the methane refrigeration cycle is used as make-up refrigerant in the methane refrigeration cycle. A pressurized portion of the refrigerant from the methane refrigeration cycle is employed as fuel gas. Excess refrigerant from the methane refrigeration cycle can be recombined with the processed natural gas stream, rather than flared. 137-. (canceled)38. A method for liquefying a natural gas stream comprising the steps of: wherein the at least three sequential cooling cycles comprise a first cooling cycle with a first refrigerant, a second cooling cycle with a second refrigerant, and a third cooling cycle with a third refrigerant, wherein the third refrigerant is a predominantly methane refrigerant;', 'wherein the third cooling cycle comprises an open-loop methane refrigeration cycle;', 'wherein the third cooling cycle comprises a methane;, 'providing a cascade-type liquefied natural gas facility having at least three sequential cooling cycles, each employing a different refrigerant;'}cooling the natural gas stream in the first cooling cycle with the first refrigerant;cooling the natural gas stream in the second cooling cycle with the second refrigerant;introducing the natural gas stream to a heavies removal column for separating the natural gas stream into a heavies stream and a heavies-reduced natural gas stream;compressing the predominantly methane refrigerant to form a compressed methane refrigerant;separating the compressed methane refrigerant into a first compressed methane refrigerant portion and a second ...

Подробнее
Номер записи: 29
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: 30
19-12-2013 дата публикации

METHOD OF RECOVERY OF NATURAL GAS LIQUIDS FROM NATURAL GAS AT NGLS RECOVERY PLANTS

Номер: US20130333416A1
Автор: Lourenco Jose, Millar MacKenzie
Принадлежит:

A method to recover natural gas liquids from natural gas streams at NGL recovery plants. The present invention 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 invention provides methods to efficiently and economically achieve higher recoveries of natural gas liquids at NGL recovery plants. 1. A method for recovery of natural gas liquids from natural gas using the cold energy stored in LNG comprising the step of:The storage and supply of LNG as an external cooling source to control the operation and recovery of NGLs in a distillation column.2. The method as defined in claim 1 , providing LNG as a reflux stream by a temperature control of the overhead gas stream by mixing of LNG with the rising gas stream in the distillation column.3. The method as defined in claim 1 , providing LNG to directly mix with un-distilled expanded claim 1 , feed gas to allow distillation column to operate at higher pressures without loss of recovery.4. The method as defined in claim 1 , providing LNG as a stripping gas for carbon dioxide concentration in NGL product stream.5. method described in claim 1 , providing LNG to cool an overhead stream to generate a second reflux stream for a dual reflux distillation column operation.6. A method for recovery of natural gas liquids from a natural gas comprising the steps of:positioning a storage vessel for liquid natural gas (LNG) at a NGL recovery plant facility that has at least one distillation column for recovering natural gas liquids (NGLs);adding LNG from the storage vessel by direct mixing to control the temperature profile in a NGL distillation column, the temperature in the overhead product of the distillation column being controlled by controlling addition of LNG as a reflux stream, the temperature in the expanded feed gas to the distillation column being controlled by controlling ...

Подробнее
Номер записи: 31
19-12-2013 дата публикации

NGL Recovery Without Cryogenic Conditions, Membranes, and Carbon Dioxide Recovery Solvents

Номер: US20130333417A1
Автор: Prim Eric
Принадлежит: Pilot Energy Solutions, LLC

A method for recovering natural gas liquids without using cryogenic conditions, membranes, and carbon dioxide recovery solvents is provided. In one embodiment, a carbon dioxide recycle stream that comprises carbon dioxide and natural gas liquids is received. The carbon dioxide recycle stream is separated into a purified carbon dioxide recycle stream and a natural gas liquids stream. The purified carbon dioxide recycle stream comprises the carbon dioxide, and the natural gas liquids stream comprises the natural gas liquids. The carbon dioxide recycle stream, the purified carbon dioxide recycle stream, and the natural gas liquids are not subjected to cryogenic conditions, membranes, and carbon dioxide recovery solvents between being received and being separated into the purified carbon dioxide recycle stream and the natural gas liquids stream. 1. A method comprising:receiving a carbon dioxide recycle stream, wherein the carbon dioxide recycle stream comprises carbon dioxide and natural gas liquids;separating the carbon dioxide recycle stream into a purified carbon dioxide recycle stream and a natural gas liquids stream, wherein the purified carbon dioxide recycle stream comprises the carbon dioxide, and wherein the natural gas liquids stream comprises the natural gas liquids, andwherein the carbon dioxide recycle stream, the purified carbon dioxide recycle stream, and the natural gas liquids stream are not subjected to cryogenic conditions, membranes, and carbon dioxide recovery solvents between being received and being separated into the purified carbon dioxide recycle stream and the natural gas liquids stream.2. The method according to claim 1 , wherein the carbon dioxide recycle stream comprises natural gas claim 1 , and wherein separating the carbon dioxide recycle stream into the purified carbon dioxide recycle stream and the natural gas liquids stream comprises separating the natural gas into the purified carbon dioxide recycle stream.3. The method according to ...

Подробнее
Номер записи: 32
26-12-2013 дата публикации

METHOD FOR PRODUCING A C3+ HYDROCARBON-RICH FRACTION AND A METHANE- AND ETHANE-RICH STREAM FROM A HYDROCARBON-RICH FEED STREAM, AND RELATED FACILITY

Номер: US20130340473A1
Автор: Barthe Loic, Gahier Vanessa, Gouriou Julie, Thiebault Sandra
Принадлежит: TECHNIP FRANCE

The method according to the invention comprises the separation of a feed stream () into a first fraction () and a second fraction () and the injection of at least part of the second fraction () into a second dynamic expansion turbine () to form a second expanded fraction (). 1. A method for producing a C hydrocarbon-rich cut and a methane- and ethane-rich stream , from a feed stream containing hydrocarbons , the method comprising the following steps:partially cooling and condensing a first fraction of the feed stream in a first heat exchanger;injecting the first cooled fraction into a first separating flask to form a first gas headstream and a first liquid bottoms stream;injecting at least part of the first headstream into a first dynamic expansion turbine;forming a first feed stream of a first column from the first expanded fraction coming from the first dynamic expansion turbine and injecting the first feed stream into the lower part of a first column to recover a first headstream and a first bottoms stream;heating at least part of the first headstream in a second heat exchanger, then in the first heat exchanger, and compressing at least part of the heated headstream in a first compressor coupled to the first turbine, then in a second compressor to form the methane- and ethane-rich stream;injecting the first bottoms stream into a second fractionating column to recover a second headstream and a second bottoms stream;{'sub': '3', 'sup': '+', 'forming the C hydrocarbon-rich cut from the second bottoms stream;'}at least partially cooling and condensing the second headstream, advantageously in the first heat exchanger, and injecting the second partially condensed headstream into a head separating flask to form a second gas headstream and a second liquid bottoms stream;injecting the second liquid bottoms stream in reflux into the second fractionating column;at least partially cooling and condensing the second gas headstream, advantageously in the second heat exchanger; ...

Подробнее
Номер записи: 33
02-01-2014 дата публикации

Apparatus for storing hydrogen and magnetic energy and a method for the operation of said apparatus

Номер: US20140000288A1
Автор: Holger Neumann, Michael Sander
Принадлежит: Karlsruher Institut fuer Technologie KIT

An apparatus for storing hydrogen and magnetic energy includes a storage tank for liquefied hydrogen with an inlet line for compressed hydrogen and an outlet line for hydrogen at a relatively low pressure. The apparatus includes a superconducting magnetic energy store, which comprises a magnetic coil relative to which electrical energy can be supplied or withdrawn via power supply lines to the magnet coil, the energy being located in a cryogenic tank provided with a cooling device and being held at operating temperature. The storage tank for liquefied hydrogen includes cooling device, at least one regenerator, with a heat-absorbing and heat-emitting storage medium, a warm side and a cold side. From the warm side, the compressed hydrogen and, from the cold side, liquefied hydrogen can be supplied from the storage tank for liquefied hydrogen. A relief valve is located in the field region of the at least one magnet coil. The relief valve is connected to the cold side of the regenerator so the compressed hydrogen, having passed through the regenerator, can be fed into the relief valve and, owing to the pressure relief, can be supplied, at least partially as liquefied hydrogen to the storage tank for liquefied hydrogen.

Подробнее
Номер записи: 34
06-02-2014 дата публикации

Heavy Hydrocarbon Removal From A Natural Gas Stream

Номер: US20140033762A1
Автор: Chen Fei, Krishnamurthy Gowri, Luo Xukun, Ott Christopher Michael, Roberts Mark Julian
Принадлежит: AIR PRODUCTS AND CHEMICALS, INC.

A method and apparatus of removing heavy hydrocarbons from a natural gas feed stream, the method comprising using first and second hydrocarbon removal systems in series such that the first system processes the natural gas feed stream to produce a heavy hydrocarbon depleted natural gas stream and the second system processes at least a portion of the heavy hydrocarbon depleted natural gas stream from the first system to produce a natural gas stream lean in heavy hydrocarbons, wherein one of said systems is a adsorption system that comprises one or more beds of adsorbent for adsorbing and thereby removing heavy hydrocarbons from a heavy hydrocarbon containing natural gas, and the other of said systems is a gas-liquid separation system for separating a heavy hydrocarbon containing natural gas into a heavy hydrocarbon depleted natural gas vapor and a heavy hydrocarbon enriched liquid. 1. A method of removing heavy hydrocarbons from a natural gas feed stream , the method comprising the steps of using a first heavy hydrocarbon removal system and a second heavy hydrocarbon removal system to process the natural gas feed stream to produce a natural gas stream lean in heavy hydrocarbons , wherein said first and second systems are used in series such that the first system processes the natural gas feed stream to produce a heavy hydrocarbon depleted natural gas stream and the second system processes at least a portion of the heavy hydrocarbon depleted natural gas stream from the first system to produce the natural gas stream lean in heavy hydrocarbons , and wherein one of said systems is an adsorption system that comprises one or more beds of adsorbent for adsorbing and thereby removing heavy hydrocarbons from a heavy hydrocarbon containing natural gas , and the other of said systems is a gas-liquid separation system for separating a heavy hydrocarbon containing natural gas into a heavy hydrocarbon depleted natural gas vapor and a heavy hydrocarbon enriched liquid.2. The method ...

Подробнее
Номер записи: 35
06-02-2014 дата публикации

Heavy Hydrocarbon Removal From A Natural Gas Stream

Номер: US20140033763A1
Автор: Chen Fei, Krishnamurthy Gowri, Luo Xukun, Ott Christopher Michael, Roberts Mark Julian
Принадлежит: AIR PRODUCTS AND CHEMICALS, INC.

A method and apparatus of removing heavy hydrocarbons from a natural gas feed stream, the method comprising using first and second hydrocarbon removal systems in series such that the first system processes the natural gas feed stream to produce a heavy hydrocarbon depleted natural gas stream and the second system processes at least a portion of the heavy hydrocarbon depleted natural gas stream from the first system to produce a natural gas stream lean in heavy hydrocarbons, wherein one of said systems is a adsorption system that comprises one or more beds of adsorbent for adsorbing and thereby removing heavy hydrocarbons from a heavy hydrocarbon containing natural gas, and the other of said systems is a gas-liquid separation system for separating a heavy hydrocarbon containing natural gas into a heavy hydrocarbon depleted natural gas vapor and a heavy hydrocarbon enriched liquid. 1. A method of removing heavy hydrocarbons from a natural gas feed stream , the method comprising the steps of using a first heavy hydrocarbon removal system and a second heavy hydrocarbon removal system to process the natural gas feed stream to produce a natural gas stream lean in heavy hydrocarbons , wherein said first and second systems are used in series such that the first system processes the natural gas feed stream to produce a heavy hydrocarbon depleted natural gas stream and the second system processes at least a portion of the heavy hydrocarbon depleted natural gas stream from the first system to produce the natural gas stream lean in heavy hydrocarbons , and wherein one of said systems is an adsorption system that comprises one or more beds of adsorbent for adsorbing and thereby removing heavy hydrocarbons from a heavy hydrocarbon containing natural gas , and the other of said systems is a gas-liquid separation system for separating a heavy hydrocarbon containing natural gas into a heavy hydrocarbon depleted natural gas vapor and a heavy hydrocarbon enriched liquid.2. The method ...

Подробнее
Номер записи: 36
27-02-2014 дата публикации

Modular LNG Production Facility

Номер: US20140053599A1
Автор: Byfield Geoffrey Brian
Принадлежит: Woodside Energy Technologies Pty Ltd.

A liquefied natural gas production facility and a method of designing and constructing a liquefied natural gas production facility are described. The facility includes space-apart modules for installation at a production location to form a production train including a major axis and a minor axis, each module including a module base for mounting a plurality of plant equipment associated with a selected function assigned to the module, the module base including a major axis and a minor axis. Heat exchangers are arranged to run parallel to the major axis of the production train to form a heat exchanger bank including a major axis and a minor axis, where the major axis of the bank is parallel to the major axis of the train. A subset of the plurality of heat exchangers is arranged on a first level vertically offset from the base of at least one module. 1. A liquefied natural gas production facility comprising:a plurality of space-apart modules for installation at a production location to form a production train including a major axis and a minor axis, each module including a module base for mounting a plurality of plant equipment associated with a selected function assigned to said module, the module base including a major axis and a minor axis; and,a plurality of heat exchangers arranged to run parallel to the major axis of the production train to form a heat exchanger bank including a major axis and a minor axis, wherein the major axis of the bank is parallel to the major axis of the train;wherein a subset of the plurality of heat exchangers is arranged on a first level vertically offset from the base of at least one module to form a partially covered module, and wherein the major axis of the partially covered module is arranged to lie perpendicular to the major axis of the train when the partially covered module is installed at the production location.2. The liquefied natural gas production facility of claim 1 , wherein the heat exchanger bank includes a footprint and ...

Подробнее
Номер записи: 37
27-02-2014 дата публикации

System for supplying fuel to high-pressure natural gas injection engine having excess evaporation gas consumption means

Номер: US20140053600A1
Автор: Dong Kyu Choi, Hyun Jun Shin, Je Heon Jung, Jung Han Lee, Seung Kyo Jung, Sung Jun Lee
Принадлежит: Daewoo Shipbuilding and Marine Engineering Co Ltd

Provided is a fuel supply system for a high-pressure natural gas injection engine. The fuel supply system includes: a BOG compression unit configured to receive BOG, which is generated in a storage tank, from the storage tank and compress the received BOG to a pressure of 12 to 45 bara; a reliquefaction apparatus configured to receive and liquefy the BOG compressed by the BOG compression unit; a high-pressure pump configured to compress the BOG liquefied by the reliquefaction apparatus; a high-pressure gasifier configured to gasify the BOG compressed by the high-pressure pump and supply the gasified BOG to the high-pressure natural gas injection engine; and an excess BOG consumption unit configured to consume excess BOG corresponding to a difference between an amount of BOG generated in the storage tank and an amount of BOG required as fuel for the high-pressure natural gas injection engine.

Подробнее
Номер записи: 38
06-03-2014 дата публикации

PROCESS FOR LIQUEFYING A HYDROCARBON-RICH FRACTION

Номер: US20140060111A1
Автор: BAUER Heinz, GOLLWITZER Claudia, Gwinner Martin, Lamuela Calvo Ana-Maria
Принадлежит: LINDE AKTIENGESELLSCHAFT

Described herein is a process for liquefying a hydrocarbon-rich fraction, in particular natural gas, is described, in which 1. A process for liquefying a hydrocarbon-rich fraction , comprising:{'b': 1', '4', '1', '9', '30', '37', '40', '47, 'cooling the hydrocarbon-rich fraction that is to be liquefied (A-B) in indirect heat exchange (EB-EB) against a multistage precooling circuit (-, -, -),'}wherein the refrigerant of the precooling circuit is at least 95% by volume carbon dioxide, and{'b': 7', '8', '10', '10', '19, 'liquefying and subcooling the cooled hydrocarbon-rich fraction (C) is in indirect heat exchange (E, E, E) against a mixed cycle (-),'}wherein the mixed refrigerant of the mixed cycle comprises exclusively component(s) selected from nitrogen, methane and ethane.2. The process according to claim 1 , wherein said hydrocarbon-rich fraction is natural gas.3193037404711111. The process according to claim 1 , wherein the carbon dioxide circulating in the precooling circuit (- claim 1 , - claim 1 , -) is compressed in two separate compressor casings (CA claim 1 , CB) claim 1 , a low-pressure casing (CA) and a high-pressure casing (CB) claim 1 , wherein the exit pressure of the low-pressure casing (CA) is below the critical pressure of carbon dioxide.41. The process according to claim 2 , wherein the exit pressure of the high-pressure casing (CB) is operated at a final pressure of at least 90 bar.51. The process according to claim 2 , wherein the exit pressure of the high-pressure casing (CB) is operated at a final pressure of at least 100 bar.610192. The process according to claim 1 , wherein the mixed refrigerant circulating in the mixed cycle (-) is compressed to a pressure above the critical pressure thereof (C).71119303740472. The process according to claim 1 , wherein the temperature(s) of the hydrocarbon-rich fraction that is to be liquefied claim 1 , of the carbon dioxide and/or of the mixed refrigerant is/are adjusted in such a manner that the drive ...

Подробнее
Номер записи: 39
27-03-2014 дата публикации

PROCESS FOR LIQUEFACTION OF NATURAL GAS

Номер: US20140083132A1
Автор: Maunder Anthony Dwight, Skinner Geoffrey Frederick
Принадлежит: GASCONSULT LIMITED

A process comprising: cooling natural gas with a heat exchanger and a first expander. The heat exchanger cools the feed natural gas to temperature higher than the outlet temperature of the expander, reheating the expander outlet stream in a first cold passage of the heat exchanger to slightly below the temperature of the feed natural gas to the heat exchanger, passing the cold outlet stream from the heat exchanger into a second expander wherein it is partly liquefied, separating the outlet stream of second expander into liquid and vapour fractions, collecting the liquid fraction for use as LNG product, reheating the vapour fraction in a second cold side passage of the heat exchanger to substantially the same temperature as the temperature of the feed natural gas to the heat exchanger, recycling the reheated vapour fraction partly as feed to the first expander and partly as feed to the heat exchanger. 2. The process as claimed in in which the heat exchanger receives all the feed natural gas.3. The process as claimed in in which the heat exchanger receives a large part claim 1 , at least 30% claim 1 , of the feed natural gas.4. The process as claimed in in which the feed natural gas is cooled to a temperature of −60° to −70° C.5. The modification of the process claimed in in which the said first and second gas expanders have essentially the same outlet pressure of between 5 bar and 15 bar (0.5 and 1.5 MPa) claim 1 , and the outlet streams from both expanders are combined prior to final reheating claim 1 , compression and recycle.6. The process as claimed in in which any part or all of the feed and/or compressor discharge and/or recycle streams are cooled claim 1 , typically by use of an absorption refrigeration cycles such as lithium bromide (LiBr).7. The process as claimed in in which the heat requirement for an absorption refrigeration system is supplied by gas engine or gas turbine exhaust heat claim 1 , such gas engines or turbines which may be used for supplying ...

Подробнее
Номер записи: 40
01-01-2015 дата публикации

Liquefaction of Natural Gas

Номер: US20150000334A1
Автор: Edwards David
Принадлежит:

A method and apparatus for liquefying natural gas vapour is provided. Firstly, liquid natural gas is sub-cooled at a first heat exchanger using a liquid coolant such as liquid nitrogen. The sub-cooled liquid natural gas is then used to condense the natural gas vapour at a second heat exchanger. 1. A method for condensing natural gas vapour to generate liquefied natural gas (LNG) , comprising:providing a liquid coolant, wherein the liquid coolant has a boiling point less than that of natural gas;cooling LNG at a first heat exchanger using the liquid coolant to generate sub-cooled LNG; andcondensing natural gas vapour at a second heat exchanger using the sub-cooled LNG to liquefy the natural gas vapour and thereby generate further LNG.2. A method according to claim 1 , further comprising:obtaining the LNG for cooling at the first heat exchanger from at least one LNG storage tank; andreturning the sub-cooled LNG to the at least one LNG storage tank after it is used at the second heat exchanger.3. A method according to claim 2 , further comprising delivering the further LNG to the at least one LNG storage tank.4. A method according to claim 1 , wherein the natural gas vapour is boil-off gas.5. A method according to claim 1 , wherein the liquid coolant is liquid nitrogen.6. A method according to claim 1 , further comprising compressing the natural gas vapour.7. A method according to claim 1 , further comprising:delivering LNG from a first vessel to a second vessel; andreceiving the natural gas vapour from the second vessel.8. A system for condensing natural gas vapour to generate liquefied natural gas (LNG); comprising:a first heat exchanger arranged to cool LNG using a liquid coolant to generate sub-cooled LNG, wherein the liquid coolant has a boiling point less than that of natural gas; anda second heat exchanger arranged to condense natural gas vapour using the sub-cooled LNG to liquefy the natural gas vapour and thereby generate further LNG.9. A system according to ...

Подробнее
Номер записи: 41
06-01-2022 дата публикации

System and Method of De-Bottlenecking LNG Trains

Номер: US20220003496A1
Автор: Lee Yow-Yeen, Lupascu Sorin T.
Принадлежит:

A system and method for producing liquefied natural gas (LNG) from a natural gas stream. Each of a plurality of LNG trains liquefies a portion of the natural gas stream to generate a warm LNG stream in a first operating mode, and a cold LNG stream in a second operating mode. A sub-cooling unit is configured to, in the first operating mode, sub-cool the warm LNG streams to thereby generate a combined cold LNG stream. The warm LNG streams have a higher temperature than a temperature of the cold LNG streams in the second operating mode and the combined cold LNG stream. The combined cold LNG stream has, in the first operating mode, a higher flow rate than the flow rate of the cold LNG streams in the second operating mode. 2. The system of claim 1 , wherein the sub-cooling unit uses a nitrogen refrigerant to sub-cool the warm LNG streams.3. The system of claim 1 , wherein at least one of the plurality of LNG trains uses a propane refrigerant to liquefy the respective portions of the natural gas stream.4. The system of claim 1 , wherein at least one of the plurality of LNG trains uses a mixed refrigerant to liquefy the respective portions of the natural gas stream.5. The system of claim 1 , wherein at least one of the plurality of LNG trains uses a propane refrigerant and a mixed refrigerant to liquefy the respective portions of the natural gas stream claim 1 , and wherein the sub-cooling unit uses a nitrogen refrigerant to sub-cool the warm LNG streams.6. The system of claim 1 , wherein the plurality of LNG trains have been in operation prior to installation of the sub-cooling unit.7. The system of claim 1 , wherein the plurality of LNG trains have not been in operation prior to installation of the sub-cooling unit.9. The method of claim 8 , wherein the sub-cooling unit uses a nitrogen refrigerant to sub-cool the warm LNG stream.10. The method of claim 8 , wherein at least one of the plurality of LNG trains uses a propane refrigerant to liquefy the respective portions of ...

Подробнее
Номер записи: 42
02-01-2020 дата публикации

METHODS AND SYSTEMS TO SEPARATE HYDROCARBON MIXTURES SUCH AS NATURAL GAS INTO LIGHT AND HEAVY COMPONENTS

Номер: US20200002622A1
Автор: Dandekar Preshit, Dugas Ross E., Kuvadia Zubin B.
Принадлежит:

The present invention provides strategies to integrate adsorption and liquefaction techniques to separate hydrocarbon feed mixtures into purified light and heavy components, respectively. Initially, the hydrocarbon stream is separated into a light and heavy stream. The light stream can be integrated into a natural gas product. The heavy stream is partially liquefied. A first gas liquid separation of the partially liquefied heavy stream at an elevated pressure separates the liquid heavy stream from a methane-containing gas. The rejected methane component, which generally will include some rejected C2 and C3+ material, can be recycled to be combined with the feed mixture for re-processing. A further aspect of the strategy is then to practice at least one additional gas-liquid separation of the separated liquid heavy stream at a lower pressure effective to help further resolve the liquid heavy stream from C2-containing gas. The rejected C2 component, which generally will include some rejected C1 and C3+ material, can then be recycled back into the feed mixture for reprocessing or used as all or a portion of a light hydrocarbon product. 1. A method of separating C1 and C2 hydrocarbons from C3+ hydrocarbons , comprising the steps of:a. providing a feed mixture comprising (i) at least one of C1 and/or C2 hydrocarbons, and (ii) one or more C3+ hydrocarbons;b. using at least one adsorbent to separate the feed mixture into a light component that is enriched in C1 and/or C2 hydrocarbons relative to the feed mixture and a heavy component that is enriched in C3+ content relative to the feed mixture;c. using pressure and temperature to cause the heavy component to be partially liquefied to include a first liquid portion and a first gas portion;d. separating the, first liquid portion and the first gas portion, wherein the separated first liquid portion is enriched in at least one C3+ hydrocarbon relative to the heavy component, and wherein the separated first gas portion is ...

Подробнее
Номер записи: 43
02-01-2020 дата публикации

Hybrid Tray for Introducing a Low CO2 Feed Stream into a Distillation Tower

Номер: US20200002634A1
Автор: Maher David W., Mart Charies J., Smith Ransdall K., Valencia Jaime A.
Принадлежит:

A method of separating a feed stream in a distillation tower. Vapor is permitted to rise upwardly from a distillation section of the distillation tower. A feed stream is introduced into a controlled freeze zone section of the distillation tower, the controlled freeze zone section being situated above the distillation section. The feed stream is released above a level of a liquid retained by a melt tray assembly in the controlled freeze zone section. Vapor from the distillation section is directed into the liquid retained by the melt tray assembly. A solid is formed from the feed stream in the controlled freeze zone section. 1. A distillation tower for separating a feed stream , the distillation tower comprising:a distillation section permitting vapor to rise upwardly therefrom; a spray assembly in the controlled freeze zone upper section, and', 'a melt tray assembly in the controlled freeze zone lower section;, 'a controlled freeze zone section situated above the distillation section, the controlled freeze zone constructed and arranged to form a solid from a feed stream, the controlled freeze zone section including'} a feed stream manifold that directs the feed stream into the distillation tower,', 'at least one vapor stream riser that directs the vapor from the distillation section into liquid retained by the melt tray assembly, and', 'at least one feed stream riser having a lower end operationally connected to the feed stream manifold and an upper end positioned above a level of the liquid retained by the melt tray assembly, wherein the feed stream is released above the level of the liquid retained by the melt tray assembly., 'wherein the melt tray assembly includes'}2. The distillation tower of claim 1 , wherein the at least one vapor stream riser passes through the feed stream manifold without mixing the feed stream with the vapor stream from the distillation section.3. The distillation tower of claim 1 , further comprising:a distribution cap disposed on an ...

Подробнее
Номер записи: 44
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: 45
07-01-2016 дата публикации

METHODS AND APPARATUSES FOR LIQUEFYING HYDROCARBON STREAMS

Номер: US20160003526A1
Автор: Russeff Richard
Принадлежит:

Methods and apparatuses for liquefying hydrocarbon streams are provided. In one embodiment, a method for liquefying a hydrocarbon stream includes expanding the hydrocarbon stream with a turbo expander to form an expanded hydrocarbon stream. The method includes compressing a first refrigerant with the turbo expander. Further, the method includes cooling the expanded hydrocarbon stream with the first refrigerant to form a liquid hydrocarbon stream. 1. A method for liquefying a hydrocarbon stream , the method comprising the steps of:expanding the hydrocarbon stream with a turbo expander to form an expanded hydrocarbon stream;compressing a first refrigerant with the turbo expander; andcooling the expanded hydrocarbon stream with the first refrigerant to form a liquid hydrocarbon stream.2. The method of further comprising separating the expanded hydrocarbon stream into a liquid stream and a vapor stream claim 1 , wherein cooling the expanded hydrocarbon stream with the first refrigerant comprises cooling the liquid stream and the vapor stream with the first refrigerant.3. The method of further comprising cooling the first refrigerant in a cooling cascade arrangement before cooling the expanded hydrocarbon stream with the first refrigerant.4. The method of further comprising cooling the first refrigerant with a second refrigerant before cooling the expanded hydrocarbon stream with the first refrigerant.5. The method of wherein compressing the first refrigerant with the turbo expander comprises compressing a mixed refrigerant with the turbo compressor.6. The method of further comprising cooling the first refrigerant with a second refrigerant before cooling the expanded hydrocarbon with the first refrigerant.7. The method of further comprising:cooling the first refrigerant with a second refrigerant before cooling the expanded hydrocarbon stream with the first refrigerant, wherein cooling the first refrigerant with the second refrigerant comprises exchanging heat from the ...

Подробнее
Номер записи: 46
07-01-2016 дата публикации

SYSTEM AND METHOD FOR LIQUEFYING NATURAL GAS EMPLOYING TURBO EXPANDER

Номер: US20160003527A1
Автор: ALLEN MARGARET, DEAN IRINA, PAK JOSEPH
Принадлежит: COSMODYNE, LLC

An improved system and method for liquefying natural gas employing liquid nitrogen is disclosed. The improved system and method lowers the nitrogen consumption rate by using an expander, for example, a radial inflow turbo-expander, on the nitrogen side. This reduction in nitrogen consumption rate substantially reduces system operating costs. 1. A natural gas liquefier system , comprising:a natural gas input coupled to a source of natural gas;a liquid nitrogen input coupled to a source of liquid nitrogen;a liquefier module coupled to receive the natural gas and liquid nitrogen and liquefy the natural gas by boiling the liquid nitrogen;a turbo expander module coupled to the liquefier module to receive the boiled gaseous nitrogen, cool the gaseous nitrogen by expansion and reintroduce the colder gaseous nitrogen into the liquefier module; anda liquefied natural gas output coupled to the liquefier module.2. A natural gas liquefier system as set out in claim 1 , wherein the turbo expander module comprises a turbo expander coupled to the liquefier module in a closed loop.3. A natural gas liquefier system as set out in claim 1 , wherein the liquefier module comprises at least one heat exchanger.4. A natural gas liquefier system as set out in claim 3 , wherein the at least one heat exchanger comprises a first heat exchanger and a second heat exchanger claim 3 , wherein the second heat exchanger is coupled to the liquid nitrogen source and liquefies the natural gas by boiling the liquid nitrogen and outputs liquefied natural gas to the liquefied natural gas output and outputs boiled gaseous nitrogen to the first heat exchanger claim 3 , and wherein the turbo expander is coupled in a closed loop to the first heat exchanger.5. A natural gas liquefier system as set out in claim 4 , wherein the first heat exchanger has first and second inputs for receiving gaseous nitrogen at a different temperature and different pressure from the second heat exchanger and expander claim 4 , ...

Подробнее
Номер записи: 47
07-01-2016 дата публикации

STATION FOR REDUCING GAS PRESSURE AND LIQUEFYING GAS

Номер: US20160003528A1
Автор: MARCUCCILLI Frederic, Pages Guillaume
Принадлежит:

The invention relates to a station comprising an expansion turbine means for recovering mechanical work (G) produced during the gas pressure reduction in the expansion turbine; a cooling system () comprising compression means (C C C), condensation means () for liquefying gas (G) using the cold provided by the cooling system, means for recovering heat produced by the compression means (C C C) of the cooling system and means () for heating the gas upstream of the expansion turbine that are associated with the heat-recovery means. 111-. (canceled)12. A station for reducing the pressure (PLD) of a gas and for liquefying the gas , comprising:{'b': '12', 'an expansion turbine ();'}means for recovering mechanical work (WM) produced during reduction of pressure of the gas;{'b': 1', '2', '3, 'a refrigeration system comprising compression means (C, C, C);'}{'b': '14', 'condensation means () for liquefying the gas; and'}{'b': 1', '2', '3', '10', '110', '12, 'means for recovering heat (Q) produced by the compression means (C, C, C; C) of the refrigeration system; the compression means associated with means (; ) for heating the gas upstream of the expansion turbine ().'}13191214. The station according to claim , further comprising a branch pipeline (G) downstream of the expansion turbine () for supplying the condensation means ().1411412310. The station according to claim , wherein said station comprises a closed loop between the condensation means () , the compression means (C , C , C; C) and the heating means () for the gas.151123141010110. The station according to claim , wherein said station comprises a first closed loop between the compression means (C , C , C) , the condensation means () and at least one intermediate heat exchanger (); and a second closed loop , between the at least one intermediate heat exchanger () and the heating means () for the gas.16. The station according to claim 15 , wherein the first closed loop comprises a first heat transfer fluid claim 15 , ...

Подробнее
Номер записи: 48
07-01-2016 дата публикации

Natural Gas Liquefaction Process

Номер: US20160003529A1
Автор: Feist Raymond Scott, Minta Moses, Stone John B.
Принадлежит:

The described invention relates to processes and systems for treating a gas stream, particularly one rich in methane for forming liquefied natural gas (LNG), said process including: (a) providing a gas stream; (b) providing a refrigerant; (c) compressing said refrigerant to provide a compressed refrigerant; (d) cooling said compressed refrigerant by indirect heat exchange with a cooling fluid; (e) expanding the refrigerant of (d) to cool said refrigerant, thereby producing an expanded, cooled refrigerant; (f) passing said expanded, cooled refrigerant to a first heat exchange area; (g) compressing the gas stream of (a) to a pressure of from greater than or equal to 1,000 psia to less than or equal to 4,500 psia; (h) cooling said compressed gas stream by indirect heat exchange with an external cooling fluid; and heat exchanging the compressed gas stream with the expanded, cooled refrigerant stream. 1. A process for liquefying a gas stream , said process comprising:(a) providing said gas stream at a pressure of from 600-1,000 psia (4137-6895 kPa) as a feed gas stream;(b) providing a refrigerant at a pressure of less than 1,000 psia (6895 kPa);(c) compressing said refrigerant to a pressure greater than or equal to 1500 to 5000 psia (10352 to 34474 kPa) to produce a compressed refrigerant;(d) cooling said compressed refrigerant by indirect heat exchange with a cooling fluid;(e) expanding the compressed refrigerant of (d) to cool said compressed refrigerant, to produce an expanded, cooled refrigerant at a pressure of from greater than or equal to 100 psia (689 kPa) to less than or equal to 1,000 psia (6895 kPa);(f) passing said expanded, cooled refrigerant to a first heat exchange area;(g) compressing the feed gas stream of (a) to a pressure of from greater than or equal to 1,200 psia (8,274 kPa) to less than or equal to 4,500 psia (31026 kPa) to produce a compressed feed gas stream;(h) cooling said compressed feed gas stream by indirect heat exchange with an external ...

Подробнее
Номер записи: 49
02-01-2020 дата публикации

RAW MATERIAL GAS LIQUEFYING DEVICE AND METHOD OF CONTROLLING THIS RAW MATERIAL GAS LIQUEFYING DEVICE

Номер: US20200003070A1
Автор: Kariya Daisuke, Kimura Yosuke, MIWA Yasuo, MIYAZAKI Hidetaka, Saito Yuichi, SAKAMOTO Tomohiro, YAMAZOE Naotaka
Принадлежит: KAWASAKI JUKOGYO KABUSHIKI KAISHA

A raw material gas liquefying device includes a feed line which feeds a raw material gas, a refrigerant circulation line which circulates a refrigerant, the refrigerant circulation line including an expansion unit of a turbine type which expands the refrigerant to generate cryogenic energy, and an expansion unit entrance valve provided at an entrance side of the expansion unit, a heat exchanger which exchanges heat between the raw material gas and the refrigerant, a cooler which performs initial cooling of the raw material gas and the refrigerant by heat exchange with liquid nitrogen, and a controller which manipulates the opening rate of the expansion unit entrance value and performs a feedback control so that the rotation speed of the expansion unit reaches a predetermined target value, and outputs the opening rate command to the expansion unit entrance valve, at start-up and stop of the expansion unit. 1. raw material gas liquefying device comprising:a feed line which feeds a raw material gas whose boiling temperature is lower than a boiling temperature of nitrogen;a refrigerant circulation line which circulates a refrigerant for cooling the raw material gas, the refrigerant circulation line including an expansion unit of a turbine type which expands the refrigerant to generate cryogenic energy, and an expansion unit entrance valve provided at an entrance side of the expansion unit;a heat exchanger which exchanges heat between the raw material gas and the refrigerant;a cooler which performs initial cooling of the raw material gas and the refrigerant by heat exchange with liquid nitrogen;an expansion unit rotation speed sensor which detects a rotation speed of the expansion unit; anda controller which generates an opening rate command for the expansion unit entrance valve by performing a feedback control so that the rotation speed of the expansion unit reaches a predetermined target value, and outputs the opening rate command to the expansion unit entrance valve, ...

Подробнее
Номер записи: 50
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: 51
04-01-2018 дата публикации

Mixed Refrigerant Liquefaction System and Method

Номер: US20180003430A1
Автор: Ducote, Glanville Mark R., Gushanas Timothy P., JR. DOUGLAS A.
Принадлежит:

A system for liquefying a gas includes a liquefaction heat exchanger having a feed gas inlet adapted to receive a feed gas and a liquefied gas outlet through which the liquefied gas exits after the gas is liquefied in the liquefying passage of the heat exchanger by heat exchange with a primary refrigeration passage. A mixed refrigerant compressor system is configured to provide refrigerant to the primary refrigeration passage. An expander separator is in communication with the liquefied gas outlet of the liquefaction heat exchanger, and a cold gas line is in fluid communication with the expander separator. A cold recovery heat exchanger receives cold vapor from the cold gas line and liquid refrigerant from the mixed refrigerant compressor system so that the refrigerant is cooled using the cold vapor. 1. A system for removing freezing components from a feed gas comprising:a. a feed gas line having an inlet adapted to communicate with a source of feed gas and an outlet;b. an expander having an inlet in communication with the outlet of the feed gas line and an outlet, said expander operatively connected to a loading device;c. a heavy hydrocarbon removal heat exchanger having a feed gas cooling passage with an inlet adapted to communicate with the outlet of the expander, a return vapor passage and a reflux cooling passage; i) a feed gas inlet in communication with an outlet of the feed gas cooling passage of the heat exchanger;', 'ii) a return vapor outlet in communication with an inlet of the return vapor passage of the heat exchanger;', 'iii) a reflux vapor outlet in communication with an inlet of the reflux cooling passage of the heat exchanger;', 'iv) a reflux mixed phase inlet in communication with an outlet of the reflux cooling passage of the heat exchanger;, 'd. a scrub device havinge. a reflux liquid component passage having an inlet and an outlet in communication with the scrub device;f. said scrub device configured to vaporize a reflux liquid component stream ...

Подробнее
Номер записи: 52
02-01-2020 дата публикации

DEVICE AND METHOD FOR LIQUEFYING A NATURAL GAS AND SHIP COMPRISING SUCH A DEVICE

Номер: US20200003488A1
Автор: GUEDACHA Hicham
Принадлежит:

The device () for liquefying a natural gas comprises: —a first centrifugal compressor (), —a fractionating means (), —a second centrifugal compressor (), —a first heat exchange body (), —a second heat exchange body () and —a return conduit () leading to the first compressor, —upstream of an inlet () in the first exchange body, a third heat exchange body (), —a third centrifugal compressor (), the first and third centrifugal compressors being actuated by a single common turbine (), —a casing () common to the first compressor and the third compressor, —a cooling means () and —a transfer conduit () leading to the third exchange body. 2. A device according to claim 1 , wherein the turbine actuating the first and third compressors are coupled mechanically.3. A device according to claim 2 , wherein the turbines are combined.4. A device according to claim 1 , which comprises:a separator of a gas fraction and a liquid fraction of the compressed light phase, the fourth compressor compressing the separated gas fraction,a regulator for the liquid fraction of the light phase heated in the second exchange body,the turbine of the fourth compressor being actuated by the expansion energy.5. A device according to claim 1 , wherein the second chemical compound comprises a pure substance comprising nitrogen claim 1 , propane and/or ammonia.6. A device according to claim 1 , wherein the first cooling mixture comprises nitrogen and methane and at least one compound amongst:ethylene;ethane;propane; and/orbutane.7. A device according to claim 1 , which comprises:a regulator for the liquefied natural gas,a collector for the evaporation gas produced during the expansion of the gas in the regulator, anda conduit for injecting the evaporation gas at the inlet of the second exchange body.8. A device according to claim 1 , wherein the means for cooling the second compound comprises an outlet for the second compound claim 1 , the device comprising claim 1 , between said outlet and the third ...

Подробнее
Номер записи: 53
02-01-2020 дата публикации

METHOD FOR AIR COOLED, LARGE SCALE, FLOATING LNG PRODUCTION WITH LIQUEFACTION GAS AS ONLY REFRIGERANT

Номер: US20200003489A1
Автор: CHRISTENSEN Tor, Eckbo Pål Leo
Принадлежит: Global LNG Services AS

A method for large scale, air-cooled floating liquefaction, storage and offloading of natural gas gathered from onshore gas pipeline networks, where gas gathered from on-shore pipeline quality gas sources and pre-treated to remove unwanted compounds, is compressed and cooled onshore, before being piped to an offshore vessel for liquefaction to produce LNG, is described. 1. A method for large scale , air cooled floating liquefaction , storage and offloading of natural gas , the method comprising:a) Gas gathering from on-shore sources and treating the gas on shore by removal of mercury, removal of acid gas, dehydration and removal of C6+ hydrocarbons,b) on-shore compression and cooling of the treated gas;c) piping of the compressed gas from onshore to an offshore pipeline end manifold;d) piping of gas from the pipeline end manifold to an offshore ship shaped, external turret moored vessel;e) reception of the gas on the vessel via a swivel mounted on the turret;f) distribution of the gas to three parallel liquefaction trains on the vessel;g) gas liquefaction by methane refrigerant and subsequent flash;h) cooling the gas from compressors by heat exchange with water;i) heating the cooling water to 80° C. or higher downstream process heat exchangers;j) cooling of the cooling water by heat exchange with air in air coolers:k) air coolers mounted on at least three mechanically independent cantilevers, in total extending at least 50% of the vessel length;l) recycling the cooled cooling water to process heat exchangers;m) gas turbine air intakes for liquefaction and utilities located on the opposite side of the air cooler cantilevers;n) sending LNG that is not completely stabilized to storage tanks;o) storing produced LNG in multiple smaller membrane tanks onboard the vessel;p) flashing LNG in the storage tanks;q) gas offloading to LNG tank vessels while the liquefaction processes are in full production.2. The method according to claim 1 , wherein the gas offloading is done by ...

Подробнее
Номер записи: 54
12-01-2017 дата публикации

System and Method for the Production of Liquefied Natural Gas

Номер: US20170010042A1
Автор: Kerth Jason M.
Принадлежит: DRESSER-RAND COMPANY

A method for producing liquefied natural gas (LNG) is provided. The method may include feeding natural gas from a high-pressure natural gas source to a separator and removing a non-hydrocarbon from the natural gas. A portion of the natural gas from the separator may be precooled, and the precooled natural gas may be cooled in a first heat exchanger with a first refrigeration stream. A first portion of the cooled natural gas may be expanded in a turbo-expander to generate the first refrigeration stream. A second portion of the cooled natural gas may be cooled in a second heat exchanger with the first refrigeration stream and expanded in an expansion valve to produce a two-phase fluid containing the LNG and a vapor phase. The LNG may be separated from the vapor phase in a liquid separator and stored in a storage tank. 1. A method for producing liquefied natural gas from a high-pressure natural gas source , comprising:feeding natural gas from the high-pressure natural gas source to a separator;removing a non-hydrocarbon from the natural gas in the separator;precooling a portion of the natural gas from the separator in a cooling assembly;cooling the precooled natural gas from the cooling assembly in a first heat exchanger with a first refrigeration stream;expanding a first portion of the cooled natural gas from the first heat exchanger in a turbo-expander to generate the first refrigeration stream;cooling a second portion of the cooled natural gas from the first heat exchanger in a second heat exchanger with the first refrigeration stream;expanding the second portion of the cooled natural gas from the second heat exchanger in an expansion valve to produce a two-phase fluid containing the liquefied natural gas and a vapor phase;separating the liquefied natural gas from the vapor phase in a liquid separator; andstoring the liquefied natural gas in a storage tank.2. The method of claim 1 , further comprising at least partially separating natural gas liquids from the first ...

Подробнее
Номер записи: 55
12-01-2017 дата публикации

Mixed Refrigerant System and Method

Номер: US20170010043A1
Автор: Ducote, JR. DOUGLAS A., Podolski James
Принадлежит:

A system and method for cooling a gas using a mixed refrigerant includes a compressor system and a heat exchange system, where the compressor system may include an interstage separation device or drum with no liquid outlet, a liquid outlet in fluid communication with a pump that pumps liquid forward to a high pressure separation device or a liquid outlet through which liquid flows to the heat exchanger to be subcooled. In the last situation, the subcooled liquid is expanded and combined with an expanded cold temperature stream, which is a cooled and expanded stream from the vapor side of a cold vapor separation device, and subcooled and expanded streams from liquid sides of the high pressure separation device and the cold vapor separation device, or combined with a stream formed from the subcooled streams from the liquid sides of the high pressure separation device and the cold vapor separation device after mixing and expansion, to form a primary refrigeration stream. 1. A system for cooling a gas with a mixed refrigerant comprising:a. a main heat exchanger including a warm end and a cold end with a feed stream cooling passage extending therebetween, the feed stream cooling passage being adapted to receive a feed stream at the warm end and to convey a cooled product stream out of the cold end, said main heat exchanger also including a low pressure liquid cooling passage, a high pressure vapor cooling passage, a high pressure liquid cooling passage, a cold separator vapor cooling passage, a cold separator liquid cooling passage and a refrigeration passage;b. a mixed refrigerant compressor system including a compressor first section having an inlet in fluid communication with an outlet of the refrigeration passage and an outlet, a first section cooler having an inlet in fluid communication with the outlet of the compressor first section and an outlet, an interstage separation device having an inlet in fluid communication with the outlet of the first section cooler and ...

Подробнее
Номер записи: 56
14-01-2016 дата публикации

AIR-COOLED MODULAR LNG PRODUCTION FACILITY

Номер: US20160010916A1
Автор: Byfield Geoffrey Brian
Принадлежит:

A liquefied natural gas production plant for producing a product stream of liquefied natural gas installed at a production location and a process for producing liquefied natural gas includes a plurality of modules and an air-cooled heat exchanger bank designed for the installed production train. The heat exchanger bank includes a first row of air-cooled heat exchanger bays, and an adjacent parallel second row of air-cooled heat exchanger bays. 1. A liquefied natural gas production process for producing a product stream of liquefied natural gas at a production location , said process comprising:a) designing a plurality of modules for installation at the production location to form an installed production train, each module having a module base for mounting a plurality of plant equipment associated with a selected function associated with the production of liquefied natural gas, said selected function being assigned to said module, the plurality of modules including a first module assigned to perform a first selected function, and, a second module assigned to perform a second selected function;(b) designing an air-cooled heat exchanger bank for the installed production train, the heat exchanger bank including: a first row of air-cooled heat exchanger bays, and, an adjacent parallel second row of air-cooled heat exchanger bays;(c) arranging a first sub-section of the first row of heat exchanger bays at an elevated level vertically offset from and towards a first edge of a first module base to form a covered section of the first module base, the first module base being designed and sized to include an uncovered section for mounting a selected piece of process equipment, wherein the first module includes the first sub-section of the first row of heat exchanger bays without including a sub-section of the second row of heat exchanger bays;(d) arranging a first sub-section of the second row of heat exchanger bays at an elevated level vertically offset from and towards a ...

Подробнее
Номер записи: 57
15-01-2015 дата публикации

Apparatus And Method For Liquefying Natural Gas By Refrigerating Single Mixed Working Medium

Номер: US20150013378A1
Автор: He Zhenyong, LIU Limei, Wang Guiqi
Принадлежит: XINDI ENERGY ENGINEERING TECHNOLOGY CO., LTD.

A system and a method for liquefying natural gas using single mixed refrigerant as refrigeration medium are provided. The system comprises a two-stage mixed refrigerant compressor (), coolers (), gas-liquid separators (), throttling devices (), a plate-fin heat exchanger group () and a LNG storage tank (). The method of the present invention reduces the power consumption for gas compression by compressing and separating the mixed refrigerant stage by stage. The heat exchange curves of cold fluid and hot fluid in the total heat exchange process match with each other better by the aid of using multiple-stage heat exchange, which can reduce the flow of the mixed refrigerant. Further, the system of the present invention has a good adaptability to load-variable operation of the apparatus, and thus can effectively avoid abnormal liquid-flooding at the bottom of the cold box. 1. A system for liquefying natural gas using single mixed refrigerant as refrigeration medium comprising a mixed refrigerant compressor system and a cold box system , wherein:the mixed refrigerant compressor system comprises:a two-stage mixed refrigerant compressor;a first cooler and a second cooler respectively connected to the first stage and the second stage of the two-stage mixed refrigerant compressor;a first gas-liquid separator and a second gas-liquid separator respectively connected to the first cooler and the second cooler; anda liquid pump connected to the first stage gas-liquid separator,and the cold box system comprises:a plate-fin heat exchanger group comprising at least six heat exchange passages, i.e., the first, second, third, fourth, fifth and sixth heat exchange passages, wherein the inlet ends of the first and second heat exchange passages are respectively connected to the gas phase port and liquid phase port of the second gas-liquid separator via two pipelines, and the outlet end of the third heat exchange passage are connected to the first stage compressor by pipeline;a first ...

Подробнее
Номер записи: 58
15-01-2015 дата публикации

LNG Formation

Номер: US20150013379A1
Автор: Oelfke Russell H.
Принадлежит:

Systems and a method for the formation of a liquefied natural gas (LNG) are disclosed herein. The system includes a refrigeration system configured to chill a natural gas using a refrigerant mixture including a noble gas. The system also includes an autorefrigeration system configured to use the natural g self-refrigerant to form the LNG from the natural gas. 1. A system for formation of a liquefied natural gas (LNG) , comprising:a refrigeration system configured to chill a natural gas using a refrigerant mixture comprising a noble gas; andan autorefrigeration system configured to use the natural gas as a self-refrigerant to form the LNG from the natural gas.2. The system of claim 1 , comprising a first refrigeration system configured to cool the natural gas using a non-hydrocarbon refrigerant prior to flowing the natural gas into the refrigeration system.3. The system of claim 1 , comprising a nitrogen recovery unit upstream of the autorefrigeration system.4. The system of claim 1 , wherein the system is configured to chill the natural gas for hydrocarbon dew point control.5. The system of claim 1 , wherein the system is configured to chill the natural gas for natural gas liquid (NGL) extraction.6. The system of claim 1 , wherein the system is configured to separate methane and lighter gases from carbon dioxide and heavier gases.7. The system of claim 1 , wherein the system is configured to prepare hydrocarbons for liquefied petroleum gas (LPG) production storage.8. The system of claim 1 , wherein the system is configured to condense a reflux stream.9. The system of claim 1 , wherein the refrigerant mixture comprises xenon or krypton claim 1 , or any combination thereof.10. The system of claim 1 , wherein the refrigerant mixture comprises xenon claim 1 , krypton claim 1 , argon claim 1 , or nitrogen claim 1 , or any combinations thereof.11. The system of claim 1 , wherein the refrigeration system comprises a mechanical refrigeration system claim 1 , valve expansion ...

Подробнее
Номер записи: 59
03-02-2022 дата публикации

LARGE LIQUID OXYGEN AND LIQUEFIED NATURAL GAS PRODUCTION PROCESS

Номер: US20220034584A1
Автор: Guillard Alain, TURNEY Michael A.
Принадлежит:

A process for co-producing a liquid oxygen and a liquefied hydrocarbon stream, including introducing a gaseous hydrocarbon stream and a gaseous nitrogen stream into a liquefier, thereby producing a liquefied hydrocarbon stream and a liquid nitrogen stream, liquefying a gaseous oxygen stream, wherein at least a portion of the required refrigeration is obtained from the liquid nitrogen stream. Wherein the liquefied hydrocarbon stream and the liquefied gaseous oxygen stream have mass flow rates. The liquid oxygen stream may be produced in an aft separation unit, wherein at least a portion of the required refrigeration is obtained from the liquid nitrogen stream. 1. A process for co-producing a liquid oxygen and a liquefied hydrocarbon stream , comprising:introducing a gaseous hydrocarbon stream and a gaseous nitrogen stream into a liquefier, thereby producing a liquefied hydrocarbon stream and a liquid nitrogen stream,liquefying a gaseous oxygen stream, wherein at least a portion of he required refrigeration is obtained from the liquid nitrogen stream, wherein the liquefied hydrocarbon stream and the liquefied gaseous oxygen stream have mass flow rates.2. The process of claim 1 , wherein the ratio of mass flow rates of the liquefied gaseous oxygen stream and the liquefied hydrocarbon stream is between 2 to 5.3. The process of claim 1 , wherein the ratio of mass flow rates of the liquefied gaseous oxygen stream and the liquefied hydrocarbon stream is between 3 to 4.4. The process of claim 1 , wherein the liquefier uses a dual refrigerant liquefaction process claim 1 , comprising a first refrigerant and a secondary refrigerant.5. The process of claim 4 , wherein the first refrigerant is nitrogen or neon or a mixture of neon and nitrogen.6. The process of claim 4 , wherein the secondary refrigerant is a hydrocarbon mixed refrigerant.7. A process for co-producing a liquid oxygen and a liquefied hydrocarbon stream claim 4 , comprising:introducing a gaseous hydrocarbon ...

Подробнее
Номер записи: 60
19-01-2017 дата публикации

SYSTEMS AND METHODS FOR FLOATING DOCKSIDE LIQUEFACTION OF NATURAL GAS

Номер: US20170016666A1
Автор: Hruska Martin A., McGeachie Kenneth Hugh, Norton Thomas M., Olsen Robert Tylor, Scott Edward, Watzak Michael Anthony
Принадлежит:

System and methods for floating dockside liquefaction of natural gas are described. A system for floating dockside liquefaction of natural gas comprises a natural gas pretreatment facility located onshore proximate a dock, wherein the natural gas pretreatment facility is configured to process pipeline quality gas into pretreated natural gas, a floating liquefaction unit moored at the dock, wherein the floating liquefaction unit further comprises a natural gas liquefaction module on a deck, and an LNG storage tank for storing produced LNG below the deck, a pipeline coupling the onshore pretreatment facility to the dock, wherein the pipeline is configured to transport pretreated natural gas onto the dock, and a high pressure gas arm fluidly coupling the pipeline to the floating liquefaction unit, wherein the gas arm is configured to transfer pretreated natural gas to the floating liquefaction unit. 1. A system for floating dockside liquefaction of natural gas comprising:a floating liquefaction unit moored at a sea island, wherein the floating liquefaction unit further comprises a natural gas liquefaction module and an LNG storage tank that stores produced LNG;a natural gas pretreatment facility located onshore proximate the sea island, the onshore natural gas pretreatment facility comprising storage for condensate removed from natural gas onboard the floating liquefaction unit;a pipeline extending at least partially below a surface of a water that transports pretreated natural gas from the onshore pretreatment facility to the sea island; anda natural gas conduit that delivers pipeline quality natural gas to the onshore pretreatment facility.2. The system of claim 1 , further comprising an LNG carrier that receives LNG from the LNG storage tank onboard the floating liquefaction unit.3. The system of claim 2 , wherein the LNG carrier is moored at the sea island.4. The system of claim 2 , wherein the LNG carrier is moored side-by-side with the floating liquefaction unit. ...

Подробнее
Номер записи: 61
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: 62
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: 63
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: 64
18-01-2018 дата публикации

METHOD AND APPARATUS FOR COOLING DOWN A CRYOGENIC HEAT EXCHANGER AND METHOD OF LIQUEFYING A HYDROCARBON STREAM

Номер: US20180017320A1
Автор: BAHARI Yang Kholijah, JARUWATTANACHAI Preeda
Принадлежит:

The present invention relates to a method and apparatus for cooling down a cryogenic heat exchanger adapted to liquefy a hydrocarbon stream, such as a natural gas stream. The method comprises: (i) receiving one or more refrigerant temperature indications, providing an indication of the temperature of the refrigerant, (ii) comparing the one or more refrigerant temperature indications with one or more associated predetermined threshold values, and (iii) based on the outcome of the comparison under (ii) selecting one of an automated warm cooling down procedure of the cryogenic heat exchanger and an automated cold cooling down procedure of the cryogenic heat exchanger. 1. Apparatus for cooling down a cryogenic heat exchanger adapted to liquefy a hydrocarbon stream , such as a natural gas stream , which cryogenic heat exchanger is arranged to receive the hydrocarbon stream to be liquefied and a refrigerant , to exchange heat between the hydrocarbon stream and the refrigerant , thereby at least partially liquefying the hydrocarbon stream , and to discharge the at least partially liquefied hydrocarbon stream and spent refrigerant that has passed through the cryogenic heat exchanger , the apparatus comprisinga refrigerant recirculation circuit to recirculate spent refrigerant back to the cryogenic heat exchanger, the refrigerant recirculation circuit comprising at least a compressor, a compressor recycle valve, a cooler, and a first JT valve; (i) receive one or more refrigerant temperature indications, providing an indication of the temperature of the refrigerant,', '(ii) compare the one or more refrigerant temperature indications with one or more associated predetermined threshold values, and', '(iii) based on the outcome of the comparison under (ii) select one of an automated warm cooling down procedure of the cryogenic heat exchanger and an automated cold cooling down procedure of the cryogenic heat exchanger., 'a programmable controller arranged to perform a comparison ...

Подробнее
Номер записи: 65
17-04-2014 дата публикации

Method of cooling boil off gas and an apparatus therefor

Номер: US20140102133A1
Автор: Alan Roderick Duckett
Принадлежит: Babcock Integrated Technology Ltd

The disclosure relates to a method and apparatus for cooling, preferably liquefying a boil off gas (BOG) stream from a liquefied cargo in a floating transportation vessel, said liquefied cargo having a boiling point of greater than −110° C. at 1 atmosphere and comprising a plurality of components, said method comprising at least the steps of: compressing a boil off gas stream ( 01 ) from said liquefied cargo in two or more stages of compression comprising at least a first stage ( 65 ) and a final stage ( 75 ) to provide a compressed BOG discharge stream ( 06 ), wherein said first stage ( 65 ) of compression has a first stage discharge pressure and said final stage ( 75 ) of compression has a final stage suction pressure and one or more intermediate, optionally cooled, compressed BOG streams ( 02, 03, 04 ) are provided between consecutive stages of compression; cooling the compressed BOG discharge stream ( 06 ) to provide a cooled vent stream ( 51 ) and a cooled compressed BOG stream ( 08 ); expanding, optionally after further cooling, a portion of the cooled compressed BOG stream ( 08 ) to a pressure between that of the first stage discharge pressure and the final stage suction pressure to provide an expanded cooled BOG stream ( 33 ); heat exchanging the expanded cooled BOG stream ( 33 ) against the cooled vent stream ( 51 ) to provide a further cooled vent stream ( 53 ).

Подробнее
Номер записи: 66
16-01-2020 дата публикации

SYSTEMS AND METHODS FOR ACTIVE CLOUD POINT ADJUSTMENT AND REFRIGERATION CYCLES

Номер: US20200017741A1
Автор: Novek Ethan J.
Принадлежит:

The present invention pertains to systems, methods, and compositions for liquid phase change, including for active cloud point, e.g., critical solution temperature, adjustment and heating or cooling, e.g., refrigeration, cycles. In some embodiments heat is absorbed, released or both due to phase changes in a liquid system. Advantageously, the phase changes may be controlled by controlling the ingredients or amounts of certain components of the liquid system. Advantages may include lower capital expenditures, lower operating expenses, or both for a diverse and wide range of heating and cooling applications. Such applications include, for example, cooling of data centers, cooled transportation of goods, refrigeration, heat pumps, extractions, ocean thermal energy conversion, and de-icing of roads to name just a few. 2. The process of wherein said dissolving comprises pressure retarded osmosis claim 1 , or forward osmosis claim 1 , or osmotically assisted reverse osmosis claim 1 , or a combination thereof.3. The process of further comprising separating at least a portion of said first and said second liquid phase.4. The process of wherein said separating comprises non-contiguous separating.5. The process of further comprising heating said first or said second liquid phase above a phase transition temperature of the composition before or during said dissolving.6. The process of further comprising separating at least a portion of said first and said second liquid phase and then heating said first or said second liquid phase above a phase transition temperature of the composition.7. The process of wherein the wherein the temperature of phase transitioning is adjusted by adjusting the concentration of a reagent.8. The process of wherein said adjusting is reversible.9. The process of wherein the first liquid phase comprises a draw solution and the second liquid phase comprises a feed solution;wherein the draw solution comprises a reagent with a molecular weight or hydration ...

Подробнее
Номер записи: 67
22-01-2015 дата публикации

METHODS AND SYSTEMS FOR UNDERWATER GAS PRESSURIZATION AND LIQUEFACTION

Номер: US20150020541A1
Автор: BRODT Alexander
Принадлежит: S.G.B.D. TECHNOLOGIES LTD.

Underwater gas pressurization units and liquefaction systems, as well as pressurization and liquefaction methods are provided. Gas is compressed hydraulically by a rising pressurization liquid that is separated from the gas by a water immiscible liquid layer on top of an aqueous salt solution. Tall vessels are used to reach a high compression ratio that lowers the liquefaction temperature. The pressurizing liquid is delivered gravitationally, after gasification, transport to smaller water depths and condensation. Cooling units are used to liquefy the compressed gas. A cascade of compression and cooling units may be used with sequentially higher liquefaction temperatures, which allow eventual cooling by sea water. The pressurizing liquid, dimensions of the vessels, the delivery unit, the coolants and the implementation of the cooling units are selected according to the sea location, to enable natural gas liquefaction in proximity to the gas source. 1. An underwater gas pressurization unit comprising:at least one vertical vessel arranged to receive gas through a top of the vessel and a pressurizing liquid through a bottom of the vessel, and further comprising a layer of water-immiscible liquid upon a layer of aqueous salt solution,wherein a density of the pressurizing liquid is higher than a density of aqueous salt solution, which is in turn higher than a density of the water-immiscible liquid, to maintain the layer of aqueous salt solution on top of the pressurizing liquid and to maintain the layer of water-immiscible liquid on top of the layer of aqueous salt solution, anda valve system arranged to pressurize the gas by introducing the pressurizing liquid into the vessel, evacuate the pressurized gas through the top of the vertical vessel upon reaching a specified pressure and introduce gas into the vessel by evacuating the pressurizing liquid through the bottom of the vertical vessel.2. The underwater gas pressurization unit of claim 1 , further comprising a ...

Подробнее
Номер записи: 68
22-01-2015 дата публикации

UNDERWATER GAS FIELD DEVELOPMENT METHODS AND SYSTEMS

Номер: US20150020542A1
Автор: BRODT Alexander
Принадлежит: S.G.B.D. TECHNOLOGIES LTD.

Underwater gas pressurization units and liquefaction systems, as well as pressurization and liquefaction methods and gas field development methods are provided. Gas is compressed hydraulically by seawater introduced into vessels and separated from the gas by a water immiscible liquid layer. Tall, possibly vertical helical vessels are used to reach a high compression ratio that lowers the liquefaction temperature. Cooling units are used to liquefy the compressed gas, possibly by a coolant which is itself pressurized by a similar mechanism. The coolant may be selected to be liquefied under surrounding seawater temperatures. The seawater which is used to pressurize the gas may be used after evacuation from the vessels to pressurize intrastratal gas in the production stages and broaden the gas field development. 1. An underwater gas pressurization unit comprising:at least one vessel arranged to receive gas through a top of the vessel and seawater through a bottom of the vessel, and further comprising a layer of water-immiscible liquid separating between the gas and the seawater, the water-immiscible liquid selected to have a density which is intermediate between a density of the gas and a density of the seawater; anda valve system arranged to pressurize the gas by introducing the seawater into the vessel, evacuate the pressurized gas through the top of the vessel upon reaching a specified pressure and introduce gas into the vessel by evacuating the seawater through the bottom of the vessel.2. The underwater gas pressurization unit of claim 1 , comprising at least one pair of reciprocally operating vessels claim 1 , wherein one of the vessels in the at least one pair pressurizes gas while the other vessel receives gas.3. The underwater gas pressurization unit of claim 1 , wherein the at least one vessel is shaped as a vertical helix.4. The underwater gas pressurization unit of claim 1 , wherein the water-immiscible liquid comprises aliphatic or aromatic organic compounds ...

Подробнее
Номер записи: 69
28-01-2016 дата публикации

METHODS FOR RECOVERING NATURAL GAS USING NITROGEN REJECTION UNITS

Номер: US20160024900A1
Автор: Kibili Martin, Naumovitz Joseph
Принадлежит:

A method and system for enhanced oil recovery by performing the steps of feeding a mixture of nitrogen from a primary nitrogen supply and an optional supplemental nitrogen supply into an oil field; separating recovered oil from a gas mixture comprising nitrogen, natural gas and C2+ hydrocarbons; feeding the gas mixture to a nitrogen rejection unit operating at elevated pressures; and recovering the nitrogen, natural gas and C2+ hydrocarbons. A method for the recovery of natural gas is also described herein. 1. A method for enhanced oil recovery comprising the steps of (a) feeding nitrogen from a primary nitrogen supply into an oil field; (b) recovering oil and a gas mixture comprising nitrogen , natural gas and C2+ hydrocarbons from the oil field; (c) separating the oil from the gas mixture (d) feeding the gas mixture to a nitrogen rejection unit; and (d) recovering nitrogen , natural gas and C2+ hydrocarbons.2. The method as claimed in further comprising feeding a supplemental nitrogen supply into the oil field.3. The method as claimed in wherein the primary nitrogen supply is from an air separation unit.4. The method as claimed in wherein the supplemental nitrogen supply is from a supplemental air separation unit.5. The method as claimed in wherein the primary nitrogen supply is fed to a high pressure compressor.6. The method as claimed in wherein the high pressure compressor operates at a pressure up to 6700 pounds per square inch.7. The method as claimed in wherein the oil and the gas mixture are fed to an oil separation and sour gas removal unit claim 1 , thereby separating the recovered oil from the gas mixture.8. The method as claimed in wherein the recovered oil is fed to a storage system.9. The method as claimed in wherein the nitrogen rejection unit will separate the nitrogen from the natural gas and C2+ hydrocarbons.10. The method as claimed in wherein the nitrogen rejection unit is operating at high pressures.11. The method as claimed in wherein the high ...

Подробнее
Номер записи: 70
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: 71
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: 72
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: 73
10-02-2022 дата публикации

Gas Compression Process

Номер: US20220042741A1
Автор: Briggs Tyler, Richardson Robert
Принадлежит: Bell Engineering, Inc.

Example embodiments for a method for compressing gas into a liquified gas using a plurality of pairs of liquid gas displacers in parallel moving a working fluid between each pair of displacers to pressurize the gas, arranging sets of the parallel liquid gas displacers in a series to raise the pressure, directly cooling the gas at each displacer pair, and finally condensing the gas using a coolant, collecting the liquified gas, and pressurizing the liquified gas for use in a pipeline. 1. A method for compressing gas comprising:compressing a gas at a first stage compressor to create a first compressed gas;cooling the first compressed gas;compressing the first compressed gas at a second stage compressor to create a second compressed gas;cooling the second compressed gas;compressing the second compressed gas at a third stage compressor to create a third compressed gas;cooling the third compressed gas;compressing the third compressed gas at a fourth stage compressor to create a fourth compressed gas;cooling the fourth compressed gas;condensing the fourth compressed gas into a liquified gas;collecting the liquified gas;pressuring the liquified gas;delivering the liquified gas into a gas line.2. The method for compressing gas of wherein the gas is CO.3. The method for compressing gas of wherein the first stage compressor is a plurality of pairs of displacement vessels each pair having a dedicated pump.4. The method for compressing gas of wherein the second stage compressor is a plurality of pairs of displacement vessels each pair having a dedicated pump.5. The method for compressing gas of wherein the third stage compressor is a plurality of pairs of displacement vessels each pair having a dedicated pump.6. The method for compressing gas of wherein the fourth stage compressor is a plurality of pairs of displacement vessels each pair having a dedicated pump.7. The method for compressing gas of wherein the first stage compressor includes a plurality of centrifugal pumps.8. ...

Подробнее
Номер записи: 74
23-01-2020 дата публикации

Systems And Methods For Transporting Liquefied Natural Gas

Номер: US20200025334A1
Автор: BARCLAY Michael, Zapata M. Josue
Принадлежит:

Systems and methods for transporting and managing LNG are contemplated. A source of LNG is pumped to a pressure higher than a consumer pressure, and is vaporized to provide vaporized LNG. The vaporized LNG is transported from a first location to a second location without the need for cryogenic equipment. At the second location, the vaporized LNG is expanded to the consumer pressure or a second pressure below the consumer pressure to generate refrigeration content suitable to reliquefy at least a portion of the vaporized LNG. A reliquefied natural gas is generated at the second location while providing a natural gas product to a downstream consumer at the consumer pressure. 1. A method of providing a reliquefied natural gas product at a second location , comprising:providing liquefied natural gas (“LNG”) from an LNG source;pumping the LNG to a pressure above a consumer pressure to thereby form pressurized LNG;vaporizing the pressurized LNG at a first location to thereby form a pressurized natural gas;transporting the pressurized natural gas from the first location to the second location;expanding, at the second location, at least a portion of the pressurized natural gas to a second pressure to generate refrigeration content; andreliquefying the at least portion of the pressurized natural gas using the refrigeration content to thereby form the reliquefied natural gas product.2. (canceled)3. The method of claim 1 , wherein the pressure of the pressurized LNG is between 10 and 100 bar.4. The method of claim 1 , wherein the first location is offshore and the second location is onshore.5. (canceled)6. The method of claim 5 , wherein the second location is an LNG production plant claim 5 , an LNG regasification plant claim 5 , or a natural gas distribution plant.78-. (canceled)9. The method of claim 1 , wherein the step of expanding further comprises steps of (i) cooling the pressurized natural gas in a heat exchanger to thereby generate a cooled product stream claim 1 , ( ...

Подробнее
Номер записи: 75
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: 76
01-05-2014 дата публикации

Method for Liquefying Natural Gas with a Mixture of Coolant Gas

Номер: US20140116084A1
Автор: Bonnissel Marc, Du Parc Bertrand, ZIELINSKI Eric
Принадлежит:

A method for liquefying a natural gas primarily including methane, preferably at least 85% of methane, the other components essentially including nitrogen and C2-C4 alkanes, in which the natural gas to be liquefied is liquefied by circulating at a pressure P0 no lower than the atmospheric pressure (Patm), P0 preferably being higher than the atmospheric pressure, in at least one cryogenic heat-exchanger (EC, EC, EC) by a counter-current closed-circuit circulation in indirect contact with at least one stream of coolant gas remaining in the compressed gaseous state at a pressure P1 that is entering the cryogenic heat-exchanger at a temperature T3′ that is lower than T3, T3 being the liquefaction temperature of the liquefied natural gas at the pressure P0 at the output of said cryogenic exchanger, characterised in that the coolant gas includes a mixture of nitrogen and at least one other component selected from among neon and hydrogen. 1123. A process for liquefying natural gas comprising a majority of methane , preferably at least 85% methane , the other components essentially comprising nitrogen and C-2 to C-4 alkanes , the process comprising: liquefying said natural gas by causing said natural gas to flow at a pressure P0 higher than or equal to atmospheric pressure (Patm) , P0 preferably being higher than atmospheric pressure , through at least one cryogenic heat exchanger (EC , EC , EC) by flowing in a closed circuit as a countercurrent in indirect contact with at least one stream of refrigerant gas that remains in the gaseous state and that is compressed to a pressure P1 entering said cryogenic heat exchanger at a temperature T3′ lower than T3 , T3 being the liquefaction temperature of said liquefied natural gas on leaving said cryogenic heat exchanger , T3 being lower than or equal to the liquefaction temperature of said liquefied natural gas at atmospheric pressure , wherein said refrigerant gas consists essentially in a mixture of nitrogen and at least one ...

Подробнее
Номер записи: 77
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: 78
05-02-2015 дата публикации

Process for liquefaction of natural gas

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

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

Подробнее
Номер записи: 79
30-01-2020 дата публикации

ADDITIONAL LIQUID NATURAL GAS PLANT AND METHOD OF OPERATING THEREOF

Номер: US20200033054A1
Автор: JAGER Marco Dick, MEIRING Wouter Jan
Принадлежит:

The invention relates to a liquid natural gas plant for producing liquefied natural gas. The liquid natural gas plant comprises two or more parallel treatment and liquefaction trains, each train comprising a cooling stage arranged to receive a cleaned natural gas stream from a gas treatment stage, an NGL-extraction unit for extracting natural gas liquids, thereby generating a light natural gas stream. The liquid natural gas plant comprises an additional liquefaction train, comprising an additional cooling stage arranged to receive an additional feed stream for generating additional liquefied natural gas. The additional feed stream comprises two or more side streams taken from the light natural gas taken from the respective light natural gas streams of the one or more parallel treatment and liquefaction trains. 1. A liquid natural gas plant for producing liquefied natural gas from a contaminated natural gas feed stream , the liquid natural gas plant comprising two or more parallel treatment and liquefaction trains arranged in process portions of the contaminated natural gas feed stream in parallel , the treatment and liquefaction trains each comprising:an inlet for receiving a portion of the contaminated natural gas feed stream,a gas treatment stage for removing contaminants from the respective portion of the contaminated natural gas feed stream thereby generating a cleaned natural gas stream,a cooling stage arranged to receive the cleaned natural gas stream from the gas treatment stage for cooling at least part of the cleaned natural gas stream, wherein the cooling stage comprises a NGL-extraction unit for extracting natural gas liquids, thereby generating a light natural gas stream to be at least partially further cooled by the cooling stage to be at least partially liquefied; andan outlet for discharging liquefied natural gas,wherein the liquid natural gas plant comprises at least one additional liquefaction train, the additional liquefaction train comprising:an ...

Подробнее
Номер записи: 80
04-02-2021 дата публикации

SYSTEM AND METHOD FOR PRODUCING LIQUEFIED NATURAL GAS

Номер: US20210033337A1
Автор: Acharya Harish Radhakrishna, Hu Lishun, Lv Jing, Xue Junli, Zhang Jie
Принадлежит:

A system, and a method for producing liquefied natural gas are provided. The system includes a heat exchanger, a first supersonic chiller, and a compression unit. The heat exchanger is for cooling a feed natural gas stream to obtain a cooled natural gas stream. The first supersonic chiller is for chilling the cooled natural gas stream to produce liquefied natural gas and output at least a portion of chilled gaseous natural gas to the heat exchanger to be heated to obtain a heated natural gas stream. The compression unit is for compressing the heated natural gas stream from the heat exchanger and providing a compressed natural gas stream to the heat exchanger to be cooled together with the feed natural gas stream by heat exchanging with the at least a portion of the chilled gaseous natural gas. 1. A system , comprising:a heat exchanger for cooling a feed natural gas stream to obtain a cooled natural gas stream;a first supersonic chiller for chilling the cooled natural gas stream to produce liquefied natural gas and output at least a portion of chilled gaseous natural gas to the heat exchanger to be heated to obtain a heated natural gas stream; anda compression unit for compressing the heated natural gas stream and providing a compressed natural gas stream to the heat exchanger to he cooled together with the feed natural gas stream by heat exchanging with the at least a portion of the chilled gaseous natural gas.2. The system of claim 1 , wherein the first supersonic chiller comprises a first outlet for outputting a first portion of the chilled gaseous natural gas and a second outlet for outputting a mixture stream comprising the liquefied natural gas and another portion of the chilled gaseous natural gas claim 1 , and the system comprises at least one separation vessel in communication with the second outlet of the first supersonic chiller for separating at least a portion of the chilled gaseous natural gas from the mixture stream.3. The system of claim 2 , wherein ...

Подробнее
Номер записи: 81
11-02-2016 дата публикации

INTEGRALLY-GEARED COMPRESSORS FOR PRECOOLING IN LNG APPLICATIONS

Номер: US20160040927A1
Автор: Banchi Nicola, PELAGOTTI Antonio
Принадлежит:

A natural gas liquefaction system is disclosed, which comprises at least a pre-cooling loop, through which a first refrigerant is adapted to circulate. The pre-cooling loop comprises at least one compressor for pressurizing the first refrigerant; at least one prime mover for driving the compressor; at least one condenser for removing heat from the first refrigerant; at least a first expansion element for expanding the first refrigerant; at least a first heat exchanger for transferring heat from natural gas to the first refrigerant. The system further comprises at least a cooling loop, downstream of the pre-cooling loop, where through a second refrigerant circulates. The natural gas is adapted to be sequentially cooled in the pre-cooling loop and in the cooling loop. The compressor of the pre-cooling loop is an integrally-geared turbo-compressor comprising a plurality of compressor stages. 1. A natural gas liquefaction system comprising:at least a pre-cooling loop, through which a first refrigerant is adapted to circulate, the pre-cooling loop comprising:at least one compressor for pressurizing the first refrigerant;at least one prime mover for driving said compressor;at least one condenser for removing heat from the first refrigerant;at least a first expansion element for expanding the first refrigerant;at least a first heat exchanger for transferring heat from natural gas to the first refrigerant;and at least a cooling loop, downstream of said pre-cooling loop, where through a second refrigerant circulates, the natural gas being adapted to be sequentially cooled in the pre-cooling loop and in the cooling loop;wherein said compressor is an integrally-geared turbo-compressor comprising a plurality of compressor stages each one being provided with independent set of movable inlet guide vanes for autonomously regulating flows entering in the compressor stages.2. The system of claim 1 , wherein the pre-cooling loop is configured to divide the first refrigerant into two ...

Подробнее
Номер записи: 82
11-02-2016 дата публикации

Flexible Liquefied Natural Gas Plant

Номер: US20160040928A1
Автор: Brennan Justin G., Miller Michael R., Norman Garth M., Rasmussen Chad C.
Принадлежит:

The present techniques are directed to a flexible liquefied natural gas (LNG) plant that may be tied to an external electric grid for importing or exporting electric power. Exemplary embodiments provide a method for producing LNG that includes producing a base load capacity of refrigeration capacity for LNG production from a first compression system. Electricity may be produced from a second compressor string if electricity is needed by an external power grid, or a second amount of refrigeration capacity may be provided by the second compressor string is natural gas feed is available and the external grid does not need power. 1. A method for producing liquefied natural gas (LNG) , comprising:producing a base load refrigeration capacity for LNG production from a first compression system;producing electricity from a second compression system;exporting the electricity to an external power grid when a demand for the amount of electricity exists at the external power grid; andproducing a second load of refrigeration capacity from the second compression system when a demand for the electricity does not exist at the external power grid.2. (canceled)3. The method of claim 1 , comprising producing a third load of refrigeration capacity from a third compression system when electricity is available from the external power grid to power the compressor and natural gas feed is available to produce LNG.4. The method of claim 3 , wherein the first compression system claim 3 , the second compression system claim 3 , and the third compression system share inlet and outlet manifolds for a refrigerant.5. The method of claim 1 , further comprising increasing compression power in the first compression system by powering a generator from the external power grid claim 1 , wherein the generator is in series with a gas turbine coupled to a compressor string.6. The method of claim 1 , further comprising increasing compression power in the second compressor string by powering a generator from ...

Подробнее
Номер записи: 83
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: 84
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: 85
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: 86
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: 87
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: 88
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: 89
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: 90
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: 91
08-02-2018 дата публикации

Floating Liquefied Natural Gas Pretreatment System

Номер: US20180038554A1
Автор: Jariwala Ankur D., Peters Richard D.
Принадлежит:

A pretreatment system and method for a floating liquid natural gas (“FLNG”) facility are presented. The inlet natural gas stream flows through a membrane system to remove carbon dioxide and a heat exchanger, producing first and second cooled CO-depleted non-permeate streams. The first cooled CO-depleted non-permeate stream is routed to additional pretreatment equipment, while the second cooled CO-depleted non-permeate stream is routed directly to a LNG train. Alternatively, the inlet natural gas stream may flow through a membrane system to produce a single cooled CO-depleted non-permeate stream that is routed to the LNG train after sweetening and dehydration. Because the pretreatment system delivers the incoming gas stream to the LNG train at a lower temperature than conventional systems, less energy is needed to convert the gas stream to LNG. In addition, the pretreatment system has a smaller footprint than conventional pretreatment systems. 1. A pretreatment system for a floating liquid natural gas (“FLNG”) facility , the pretreatment system comprisinga membrane system configured to receive an inlet natural gas stream; and a first heated permeate stream,', 'a first cooled non-permeate stream, and', 'a second cooled non-permeate stream; and, 'a heat exchanger configured to receive and cross-exchange heat between a cooled permeate stream and a cooled non-permeate stream from the membrane system and a substantially water-free natural gas outlet stream to producean additional pretreatment process equipment;means to route the first cooled non-permeate stream to the additional pretreatment process equipment; andmeans to route the second cooled non-permeate to an LNG train.3. A pretreatment system according to wherein the membrane system is a COremoval membrane system.5. A pretreatment system according to wherein the mercury removal system includes a mercury/HS removal bed.6. A pretreatment system according to wherein at least one of the first and second cooled non- ...

Подробнее
Номер записи: 92
08-02-2018 дата публикации

Floating Liquefied Natural Gas Pretreatment System

Номер: US20180038555A1
Автор: Jariwala Ankur D., Peters Richard D.
Принадлежит:

A pretreatment system and method for a floating liquid natural gas (“FLNG”) facility are presented. The inlet natural gas stream flows through a membrane system to remove carbon dioxide and a heat exchanger, producing first and second cooled CO-depleted non-permeate streams. The first cooled CO-depleted non-permeate stream is routed to additional pretreatment equipment, while the second cooled CO-depleted non-permeate stream is routed directly to a LNG train. Alternatively, the inlet natural gas stream may flow through a membrane system to produce a single cooled CO-depleted non-permeate stream that is routed to the LNG train after sweetening and dehydration. Because the pretreatment system delivers the incoming gas stream to the LNG train at a lower temperature than conventional systems, less energy is needed to convert the gas stream to LNG. In addition, the pretreatment system has a smaller footprint than conventional pretreatment systems. 1. A pretreatment method for cooling and purifying a natural gas stream for processing into LNG , the method comprising:passing an inlet natural gas stream through a membrane system to produce a cooled permeate stream and a cooled non-permeate stream;routing the cooled permeate and non-permeate streams directly to a heat exchanger; a first cooled permeate stream,', 'a first cooled non-permeate stream, and', 'a second cooled non-permeate stream;, 'cross-exchanging heat in a heat exchanger between the cooled permeate and non-permeate streams and a substantially water-free natural gas outlet stream and to producerouting the first cooled non-permeate stream to additional pretreatment equipment; anddirecting the second cooled non-permeate stream directly to an LNG train.2. A pretreatment method according to further comprising:processing the inlet natural gas stream in a mercury removal system to form a substantially mercury-free natural gas stream.3. A pretreatment method according to wherein the mercury removal system is a mercury/ ...

Подробнее
Номер записи: 93
08-02-2018 дата публикации

ROBUST RECOVERY OF NATURAL GAS LETDOWN ENERGY FOR SMALL SCALE LIQUEFIED NATURAL GAS PRODUCTION

Номер: US20180038639A1
Автор: de BESOMBES Louis, FARGES Oriane, TURNEY Michael A.
Принадлежит: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude

A method for liquefaction of natural gas using refrigeration from a combination of sources including a refrigeration cycle and letdown energy of natural gas is provided. The natural gas to be liquefied (LNG) is boosted in pressure using a booster that is powered by expansion of a portion of the natural gas flow from the booster through a first natural gas turbine. A second flow of natural gas is expanded in a second natural gas turbine, and the resulting expanded stream, along with the natural gas expanded in the first natural gas turbine, are warmed against the natural gas to be liquefied. The flow rate of the natural gas in the second natural gas turbine is decoupled from the booster, thereby allowing for variation in flow rates and pressures while maintaining a constant production of LNG. 1. A method for the liquefaction of natural gas , the method comprising the steps of:a) withdrawing a pressurized natural gas stream from a natural gas pipeline;b) boosting a first portion of the pressurized natural gas stream to a higher pressure using a first natural gas booster to produce a boosted pressurized natural gas stream;c) expanding a first portion of the boosted pressurized natural gas stream in a first natural gas turbine to form a first expanded natural gas stream;d) warming the first expanded natural gas stream in a heat exchanger against a second portion of the boosted pressurized natural gas stream to produce a first warmed natural gas stream;e) expanding a second portion of the pressurized natural gas stream in a second natural gas turbine to form a second expanded natural gas stream;f) warming the second expanded natural gas stream in the heat exchanger against the second portion of the boosted pressurized natural gas stream to produce a second warmed natural gas stream; andg) liquefying the second portion of the boosted pressurized natural gas stream in the heat exchanger using refrigeration provided from a refrigeration cycle to form a liquefied natural gas ...

Подробнее
Номер записи: 94
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: 95
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: 96
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: 97
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: 98
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: 99
07-02-2019 дата публикации

FULL TURBOMACHINERY MODULE FOR LNG PLANTS OR THE LIKE

Номер: US20190041127A1
Автор: CECARINI Michele, GIANCOTTI Marco, GUIDOTTI Luciano, RIGHESCHI Andrea
Принадлежит:

A modular gas turbine system is disclosed. The system includes a base plate and a gas turbine engine mounted on the base plate. The gas turbine engine is drivingly coupled to a rotating load mounted on the base plate. A supporting frame extends above the base plate. A first bridge crane and a second bridge crane are movably supported on the supporting frame. 1. A transportable modular gas turbine system , comprising:a base plate;a gas turbine engine having a rotation axis, mounted on the base plate;at least one rotating load, mechanically coupled to the gas turbine engine and mounted on the base plate;a supporting frame extending above the base plate;a first bridge crane movably supported on the supporting frame;a second bridge crane movably supported on the supporting frame.2. The modular gas turbine system of claim 1 , wherein the first bridge crane and the second bridge crane are movable on common rails mounted on the supporting frame.3. The modular gas turbine system of claim 1 , wherein at least one of the first bridge crane and second bridge crane is movable on rails extending substantially parallel to a rotation axis of the gas turbine engine.4. The modular gas turbine system of claim 1 , wherein the first bridge crane is movable along first rails extending substantially parallel to the rotation axis of the gas turbine engine and the second bridge crane is movable along second rails extending substantially orthogonal to the rotation axis of the gas turbine engine.5. The modular gas turbine system of claim 1 , wherein at least one of said first bridge crane and second bridge crane is movable on first rails extending substantially parallel to the rotation axis of the gas turbine engine and projecting horizontally beyond the footprint of the base plate claim 1 , up to a lay down area arranged on a side of the base plate.6. The modular gas turbine system of claim 1 , wherein the first bridge crane has a lifting capacity higher than the second bridge crane.7. The ...

Подробнее
Номер записи: 100