[go: up one dir, main page]

RU2682595C1 - Low temperature reflux plant for converting natural gas with production of hydrocarbons c2+ (versions) - Google Patents

Low temperature reflux plant for converting natural gas with production of hydrocarbons c2+ (versions) Download PDF

Info

Publication number
RU2682595C1
RU2682595C1 RU2018131412A RU2018131412A RU2682595C1 RU 2682595 C1 RU2682595 C1 RU 2682595C1 RU 2018131412 A RU2018131412 A RU 2018131412A RU 2018131412 A RU2018131412 A RU 2018131412A RU 2682595 C1 RU2682595 C1 RU 2682595C1
Authority
RU
Russia
Prior art keywords
line
heat exchanger
gas
pressure gas
demethanizer
Prior art date
Application number
RU2018131412A
Other languages
Russian (ru)
Inventor
Андрей Владиславович Курочкин
Original Assignee
Андрей Владиславович Курочкин
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Андрей Владиславович Курочкин filed Critical Андрей Владиславович Курочкин
Priority to RU2018131412A priority Critical patent/RU2682595C1/en
Application granted granted Critical
Publication of RU2682595C1 publication Critical patent/RU2682595C1/en

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0204—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the feed stream
    • F25J3/0209—Natural gas or substitute natural gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
    • F25J3/0233—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of CnHm with 1 carbon atom or more
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
    • F25J3/0238—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of CnHm with 2 carbon atoms or more
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/04—Processes or apparatus using separation by rectification in a dual pressure main column system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2200/00—Processes or apparatus using separation by rectification
    • F25J2200/80—Processes or apparatus using separation by rectification using integrated mass and heat exchange, i.e. non-adiabatic rectification in a reflux exchanger or dephlegmator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/02—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/02—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum
    • F25J2205/04—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum in the feed line, i.e. upstream of the fractionation step
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/06—Splitting of the feed stream, e.g. for treating or cooling in different ways
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2215/00—Processes characterised by the type or other details of the product stream
    • F25J2215/04—Recovery of liquid products
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/20—Integrated compressor and process expander; Gear box arrangement; Multiple compressors on a common shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/22—Compressor driver arrangement, e.g. power supply by motor, gas or steam turbine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/30—Compression of the feed stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2235/00—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams
    • F25J2235/60—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams the fluid being (a mixture of) hydrocarbons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2240/00—Processes or apparatus involving steps for expanding of process streams
    • F25J2240/02—Expansion of a process fluid in a work-extracting turbine (i.e. isentropic expansion), e.g. of the feed stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2240/00—Processes or apparatus involving steps for expanding of process streams
    • F25J2240/30—Dynamic liquid or hydraulic expansion with extraction of work, e.g. single phase or two-phase turbine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/04—Internal refrigeration with work-producing gas expansion loop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/12—External refrigeration with liquid vaporising loop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/14—External refrigeration with work-producing gas expansion loop

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

FIELD: technological processes.
SUBSTANCE: invention relates to low-temperature separation plants and can be used in gas industry. Disclosed is an installation comprising, in option 1, two recuperative heat exchangers, an external cooling circuit in the evaporator, compressor, condenser and reducing device, three reducing devices, separator, refluxer and demethanizer. According to the second version, instead of external cooling circuit equipment includes compressor, refrigerator and fourth reducing device. During operation of version 1 of the plant, high pressure gas is divided into two streams, the first one is cooled in the first recuperative heat exchanger, and the second one – in the evaporator and in the second recuperative heat exchanger, then flows are combined, reduced and directed to refluxer, cooled by low pressure gas, which is then heated in the first recuperative heat exchanger and discharged. During circulation, the coolant of the external circuit after heating in the evaporator is compressed by a compressor driven by at least one of the expanders, cooled in a condenser and reduced. Reflux gas is reduced and mixed with methane-containing gas to obtain low-pressure gas. Reflux is discharged from refluxer, reduced, weathering to produce weathering gas supplied to low pressure gas line, and is fed via second recovery heat exchanger into demethanizer, from which hydrocarbons C2+ and methane-containing gas. Operation of version 2 is characterized by that the second high-pressure gas stream is compressed by a compressor driven by at least one of the expanders, cooled in a cooler, a second recuperative heat exchanger and reduced.
EFFECT: invention increases output of hydrocarbons C2+.
2 cl, 2 dwg

Description

Изобретение относится к установкам низкотемпературной сепарации и может быть использовано в газовой промышленности для получения углеводородов С2+ из природного газа.The invention relates to a low-temperature separation unit and can be used in the gas industry to produce C 2+ hydrocarbons from natural gas.

Известен способ сжижения богатого углеводородами потока с одновременным извлечением С3+ - богатой фракции с высоким выходом [RU 2317497, опубл. 20.02.2008 г., МПК F25J 1/02, F25J 3/00], осуществляемый на установке, включающей три холодильных каскада со смешанными хладоагентами разного состава и блок фракционирования, состоящий из сепаратора, детандер-компрессорного агрегата, насоса, рекуперационного теплообменника, абсорбера и отпарной колонны.A known method of liquefying a hydrocarbon-rich stream with the simultaneous extraction of C 3+ - rich fraction with high yield [RU 2317497, publ. 02/20/2008, MPK F25J 1/02, F25J 3/00], carried out at a plant comprising three refrigerating stages with mixed refrigerants of different compositions and a fractionation unit, consisting of a separator, expander-compressor unit, pump, recovery heat exchanger, absorber and stripping columns.

Недостатками известной установки являются неполное извлечение углеводородов С3+ и невозможность выделения этана.The disadvantages of the known installation are the incomplete extraction of C 3+ hydrocarbons and the inability to isolate ethane.

Наиболее близка к предлагаемому изобретению установка комплексной подготовки газа [RU 2624710, опубл. 05.07.2017 г., МПК F25J 3/00, С07С 7/00, C10G 5/06], включающая входной сепаратор, два рекуперационных теплообменника, дефлегматор, редуцирующие устройства, блок низкотемпературной сепарации и блок стабилизации.Closest to the proposed invention, the installation of integrated gas treatment [RU 2624710, publ. 07/05/2017, IPC F25J 3/00, С07С 7/00, C10G 5/06], including an inlet separator, two recuperation heat exchangers, a reflux condenser, reducing devices, a low-temperature separation unit, and a stabilization unit.

Недостатком данной установки является низкий выход углеводородов С2+ из-за недостаточного охлаждения газа.The disadvantage of this installation is the low yield of C 2+ hydrocarbons due to insufficient gas cooling.

Задача изобретения - повышение выхода углеводородов С2+.The objective of the invention is to increase the yield of hydrocarbons With 2+ .

Техническим результатом является повышение выхода углеводородов С2+за счет установки в качестве редуцирующих устройств по меньшей мере одного детандера, соединенного кинематически и/или электрически с компрессором для сжатия хладоагента внешнего контура охлаждения или хладоагента смешения, а также за счет использования холода редуцированной флегмы для охлаждения верха деметанизатора и части газа высокого давления.The technical result is to increase the yield of C2 + hydrocarbons by installing at least one expander as a reducing device, kinematically and / or electrically connected to a compressor for compressing the external refrigerant refrigerant or mixing refrigerant, as well as through the use of cold reduced reflux for cooling the top demethanizer and parts of high pressure gas.

Предложено два варианта установки, в первом из которых установлен компрессор хладоагента внешнего контура охлаждения, а во втором -компрессор части газа высокого давления.Two installation options are proposed, in the first of which a refrigerant compressor of an external cooling circuit is installed, and in the second, a compressor of a part of the high-pressure gas.

Технический результат в первом варианте достигается тем, что в предлагаемой установке, оснащенной линиями газа высокого и низкого давления, включающей два рекуперационных теплообменника, дефлегматор, блок стабилизации и редуцирующие устройства, особенность заключается в том, что в качестве блока стабилизации установлен деметанизатор с верхней охлаждаемой и нижней обогреваемой секциями и зоной питания между ними, по меньшей мере одно из редуцирующих устройств выполнено в виде детандера, кинематически и/или электрически соединенного с компрессором внешнего контура охлаждения, на линии газа высокого давления параллельно расположены первый рекуперационный теплообменник и испаритель внешнего контура охлаждения со вторым рекуперационным теплообменником, затем размещены первое редуцирующее устройство и дефлегматор, соединенный с первым рекуперационным теплообменником линией газа низкого давления, которая образована линией подачи метансодержащего газа и линией подачи газа дефлегмации с расположенным на ней вторым редуцирующим устройством, кроме того, дефлегматор соединен с зоной питания деметанизатора линией подачи флегмы с расположенными на ней третьим редуцирующим устройством, выветривателем, оснащенным линией подачи газа выветривания в линию газа низкого давления до дефлегматора, насосом, охлаждающим устройством верхней секции деметанизатора и вторым рекуперационным теплообменником, при этом деметанизатор оборудован линией вывода углеводородов С2+ и линией подачи метансодержащего газа, а внешний контур охлаждения включает расположенные на линии циркуляции хладоагента испаритель, компрессор, конденсатор и редуцирующее устройство внешнего контура охлаждения.The technical result in the first embodiment is achieved by the fact that in the proposed installation, equipped with high and low pressure gas lines, including two recovery heat exchangers, a reflux condenser, a stabilization unit and reducing devices, the feature is that a demethanizer with a top cooled and at least one of the reducing devices made in the form of an expander kinematically and / or electrically connected to the compressor of the external cooling circuit, the first recuperative heat exchanger and the evaporator of the external cooling circuit with the second recuperative heat exchanger are located in parallel on the high-pressure gas line, then the first reducing device and the reflux condenser are connected to the first recuperative heat exchanger by a low-pressure gas line, which is formed by the methane-containing gas supply line and reflux gas supply line with a second reducing device located on it, in addition, a reflux condenser It is connected to the feed zone of the demethanizer with a reflux line with a third reducing device located on it, a weathering device equipped with a line for supplying weathering gas to the low pressure gas line to the reflux condenser, a pump, a cooling device for the upper section of the demethanizer and a second recovery heat exchanger, while the demethanizer is equipped with an output line C 2+ and methane gas feed line, and the external cooling circuit comprises the circulation line arranged in the refrigerant evaporator, compr quarrel, a condenser and a reducing device external cooling circuit.

Второй вариант установки отличается отсутствием внешнего контура охлаждения и расположением на линии газа высокого давления, параллельно первому рекуперационному теплообменнику, компрессора, холодильника, второго рекуперационного теплообменника и третьего редуцирующего устройства.The second installation option is characterized by the absence of an external cooling circuit and the location of a high-pressure gas on the line, parallel to the first recovery heat exchanger, compressor, refrigerator, second recovery heat exchanger and third reducing device.

Деметанизатор может быть соединен с блоком фракционирования, оснащенным линиями вывода этановой и пропан-бутановой фракций. При необходимости установку оснащают блоком очистки газа от углекислоты, например, адсорбционного или абсорбционного типа, размещаемым на линии газа высокого давления, а на линии газа низкого давления может быть установлена компрессорная станция. При необходимости снижения нагрузки на дефлегматор по жидкости, на линии газа высокого давления может быть расположен сепаратор, оснащенный линией подачи конденсата в линию подачи флегмы после дефлегматора. Насос может быть электрически или кинематически связан с одним из детандеров.The demethanizer can be connected to a fractionation unit equipped with ethane and propane-butane fractions output lines. If necessary, the installation is equipped with a carbon dioxide gas purification unit, for example, of the adsorption or absorption type, placed on the high pressure gas line, and a compressor station can be installed on the low pressure gas line. If it is necessary to reduce the load on the reflux condenser by liquid, a separator may be located on the high-pressure gas line, equipped with a condensate supply line to the reflux supply line after the reflux condenser. The pump may be electrically or kinematically coupled to one of the expanders.

Установка оснащена блоком осушки газа высокого давления, например, адсорбционного или абсорбционного типа, или устройствами для подачи свежего и вывода отработанного ингибитора гидратообразования. Деметанизатор может быть выполнен в виде ректификационной колонны с охлаждаемой верхней и обогреваемой нижней секциями. Редуцирующие устройства могут быть выполнены в виде дроссельного вентиля или вихревой трубы или детандера. В качестве остальных элементов установки могут быть размещены любые устройства соответствующего назначения, известные из уровня техники.The unit is equipped with a high-pressure gas dehydration unit, for example, of the adsorption or absorption type, or with devices for supplying fresh and withdrawing the spent hydrate inhibitor. The demethanizer can be made in the form of a distillation column with a cooled upper and heated lower sections. Reducing devices can be made in the form of a throttle valve or vortex tube or expander. As the remaining elements of the installation can be placed any device of the corresponding purpose, known from the prior art.

Установка в качестве по меньшей мере одного из редуцирующих устройств детандера, соединенного кинематически или электрически с компрессором, позволяет использовать механическую энергию редуцирования технологического потока для дополнительного охлаждения газа путем выведения из установки, с помощью конденсатора внешнего контура охлаждения тепла, которое выделяется при сжатии циркулирующего хладоагента (первый вариант), или с помощью холодильника тепла, которое выделяется при сжатии части газа высокого давления (второй вариант), что снижает температуру газа, приводит к уменьшению содержания углеводородов С2+ в газе низкого давления и увеличивает их выход в жидком виде. Расположение на линии подачи флегмы устройства для охлаждения верхней секции деметанизатора позволяет использовать холод редуцированной флегмы для охлаждения верха деметанизатора, способствует конденсации углеводородов С2+ и снижает их потери с метансодержащим газом и увеличивает выход.The installation of at least one of the reducing devices as an expander connected kinematically or electrically to a compressor allows the mechanical energy of the reduction of the process stream to be used to further cool the gas by removing the heat from the unit using a condenser that is released when the circulating refrigerant is compressed ( the first option), or using a refrigerator of heat that is released when a part of the high-pressure gas is compressed (second option), which reduces the temperature of the gas, leads to a decrease in the content of C 2+ hydrocarbons in the low-pressure gas and increases their liquid yield. The location on the reflux line of the device for cooling the upper section of the demethanizer allows you to use the cold of the reduced phlegm to cool the top of the demethanizer, promotes the condensation of C 2+ hydrocarbons and reduces their loss with methane-containing gas and increases the yield.

Установка в первом варианте включает рекуперационные теплообменники 1 и 2, внешний контур охлаждения в составе испарителя 3, компрессора 4, конденсатора 5 и редуцирующего устройства 6, редуцирующие устройства 7, 8 и 9, насос 10, выветриватель 11, дефлегматор 12 и деметанизатор 13. Второй вариант установки взамен оборудования внешнего контура охлаждения включает компрессор 14, холодильник 15 и четвертое редуцирующее устройство 16. Установка может быть оборудована блоком осушки 17, блоком очистки от углекислого газа 18, компрессорной станцией 19, сепаратором 20 (показано пунктиром). Все редуцирующие устройства условно показаны в виде детандеров.The installation in the first embodiment includes recuperation heat exchangers 1 and 2, an external cooling circuit comprising an evaporator 3, a compressor 4, a condenser 5 and a reducing device 6, reducing devices 7, 8 and 9, a pump 10, a weathering device 11, a reflux condenser 12 and a demethanizer 13. The second the installation option instead of the equipment of the external cooling circuit includes a compressor 14, a refrigerator 15 and a fourth reduction device 16. The installation can be equipped with a drying unit 17, a carbon dioxide purification unit 18, a compressor station 19, a separate rum 20 (shown in phantom). All reducing devices are conventionally shown as expanders.

При работе первого варианта установки (фиг. 1) газ высокого давления, подаваемый по линии 21 разделяют на два потока, первый охлаждают в теплообменнике 1, а второй - в испарителе 3 хладоагентом внешнего контура охлаждения, циркулирующим по линии 22, и в теплообменнике 2, затем потоки объединяют, редуцируют в устройстве 7, и подвергают дефлегмации в аппарате 12 за счет охлаждения подаваемым по линии 23 газом низкого давления, который затем нагревают в теплообменнике 2 и выводят по линии 24. При циркуляции хладоагент внешнего контура после нагрева в испарителе 3 сжимают компрессором 4, приводимым в движение с помощью по меньшей мере одного из детандеров 6, 7, 8, 9, охлаждают в конденсаторе 5 и редуцируют в устройстве 6. Газ дефлегмации выводят по линии 25, редуцируют в устройстве 8 и смешивают с метансодержащим газом, подаваемым по линии 26, образуя линию газа низкого давления 23. Из дефлегматора 12 по линии 27 выводят флегму, редуцируют ее с помощью устройства 9, выветривают в аппарате 11 с получением газа выветривания, подаваемого по линии 28 в линию 23, и остатка, который насосом 10 через охлаждающее устройство верхней секции деметанизатора 13 и теплообменник 2 подают в зону питания деметанизатора 13, из которого по линии 29 выводят углеводороды С2+ а по линии 26 - метансодержащий газ. Работа второго варианта (фиг. 2) отличается тем, что второй поток газа высокого давления сжимают компрессором 14, приводимого в движение с помощью по меньшей мере одного из детандеров 7, 8, 9, 16, охлаждают в холодильнике 15, теплообменнике 2 и редуцируют с помощью устройства 16. Возможные линии кинематической и/или электрической связи детандеров с компрессором показаны штрих-пунктиром.During operation of the first installation option (Fig. 1), the high-pressure gas supplied through line 21 is divided into two streams, the first is cooled in the heat exchanger 1, and the second in the evaporator 3 with the refrigerant of the external cooling circuit circulating along line 22, and in the heat exchanger 2, then the flows are combined, reduced in the device 7, and refluxed in the apparatus 12 by cooling with a low-pressure gas supplied through line 23, which is then heated in the heat exchanger 2 and removed via line 24. During circulation, the coolant of the external circuit after heating in aritel 3 is compressed by a compressor 4, driven by at least one of the expanders 6, 7, 8, 9, cooled in a condenser 5 and reduced in a device 6. The reflux gas is removed via line 25, reduced in a device 8 and mixed with methane-containing the gas supplied through line 26, forming a low-pressure gas line 23. Phlegm is withdrawn from the reflux condenser 12 via line 27, reduced by means of device 9, weathered in apparatus 11 to obtain the weathering gas supplied through line 28 to line 23, and the remainder, which is pumped 10 through a cooling unit The property of the upper section of the demethanizer 13 and the heat exchanger 2 are fed into the feed zone of the demethanizer 13, from which C 2+ hydrocarbons are removed via line 29 and methane-containing gas is sent through line 26. The work of the second option (Fig. 2) is characterized in that the second high-pressure gas stream is compressed by a compressor 14, driven by at least one of the expanders 7, 8, 9, 16, cooled in the refrigerator 15, the heat exchanger 2 and reduced with using device 16. Possible lines of kinematic and / or electrical connection of the expanders with the compressor are shown by dashed lines.

При необходимости в обоих вариантах установки объединенный газовый поток осушают с блоке 17, очищают от углекислого газа в блоке 18, располагаемыми на линии 21, газ низкого давления сжимают в компрессорной 19, а из сепаратора 20 в линию 27 по линии 30 может подаваться конденсат (показано пунктиром). Углеводороды С2+из деметанизатора 13 могут быть поданы на разделение с получением этановой и пропан-бутановой фракций (не показано).If necessary, in both versions of the installation, the combined gas stream is drained from block 17, cleaned of carbon dioxide in block 18 located on line 21, low pressure gas is compressed in compressor 19, and condensate can be supplied from separator 20 to line 27 via line 30 (shown dotted line). The C 2 + hydrocarbons from the demethanizer 13 can be fed for separation to give ethane and propane-butane fractions (not shown).

Таким образом, предлагаемая установка позволяет увеличить выход углеводородов С2+ и может найти применение в газовой промышленности.Thus, the proposed installation allows to increase the yield of C 2+ hydrocarbons and may find application in the gas industry.

Claims (2)

1. Установка низкотемпературной дефлегмации НТД для переработки природного газа с получением углеводородов C2+, оснащенная линиями газа высокого и низкого давления, включающая два рекуперационных теплообменника, дефлегматор, блок стабилизации и редуцирующие устройства, отличающаяся тем, что в качестве блока стабилизации установлен деметанизатор с верхней охлаждаемой и нижней обогреваемой секциями и зоной питания между ними, по меньшей мере одно из редуцирующих устройств выполнено в виде детандера, кинематически и/или электрически соединенного с компрессором внешнего контура охлаждения, на линии газа высокого давления параллельно расположены первый рекуперационный теплообменник и испаритель внешнего контура охлаждения со вторым рекуперационным теплообменником, затем размещены первое редуцирующее устройство и дефлегматор, соединенный с первым рекуперационным теплообменником линией газа низкого давления, которая образована линией подачи метансодержащего газа и линией подачи газа дефлегмации с расположенным на ней вторым редуцирующим устройством, кроме того, дефлегматор соединен с зоной питания деметанизатора линией подачи флегмы с расположенными на ней третьим редуцирующим устройством, выветривателем, оснащенным линией подачи газа выветривания в линию газа низкого давления до дефлегматора, насосом, охлаждающим устройством верхней секции деметанизатора и вторым рекуперационным теплообменником, при этом деметанизатор оборудован линией вывода углеводородов C2+ и линией подачи метансодержащего газа, а внешний контур охлаждения включает расположенные на линии циркуляции хладагента испаритель, компрессор, конденсатор и редуцирующее устройство внешнего контура охлаждения.1. Installation of low-temperature reflux NTD for processing natural gas to produce C 2+ hydrocarbons, equipped with high and low pressure gas lines, including two recovery heat exchangers, a reflux condenser, a stabilization unit and reducing devices, characterized in that a demethanizer with a top of the cooled and lower heated sections and the feed zone between them, at least one of the reducing devices is made in the form of an expander, kinematically and / or electrically with connected to the compressor of the external cooling circuit, the first recuperative heat exchanger and the evaporator of the external cooling circuit with the second recuperative heat exchanger are parallel located on the high-pressure gas line, then the first reducing device and the reflux condenser are connected to the first recuperative heat exchanger by a low-pressure gas line, which is formed by the methane-containing supply line gas and a reflux gas supply line with a second reducing device located on it, in addition, the reflux condenser is connected to the feed zone of the demethanizer by a reflux line with a third reducing device located on it, a weathering device equipped with a supply line of weathering gas to the low pressure gas line to the reflux condenser, a pump, a cooling device of the upper section of the demethanizer and a second recovery heat exchanger, while the demethanizer is equipped with an output hydrocarbons C 2+ and a methane-containing gas supply line, and the external cooling circuit includes evaporators located on the refrigerant circulation line spruce, compressor, condenser and reducing device of the external cooling circuit. 2. Установка низкотемпературной дефлегмации НТД для переработки природного газа с получением углеводородов C2+, оснащенная линиями газавысокого и низкого давления, включающая два рекуперационных теплообменника, дефлегматор, блок стабилизации и редуцирующие устройства, отличающаяся тем, что в качестве блока стабилизации установлен деметанизатор с верхней охлаждаемой и нижней обогреваемой секциями и зоной питания между ними, по меньшей мере одно из редуцирующих устройств выполнено в виде детандера, кинематически и/или электрически соединенного с компрессором, линия газа высокого давления разделена на две линии, на первой установлен первый рекуперационный теплообменник, а на второй расположены компрессор, холодильник, второй рекуперационный теплообменник и первое редуцирующее устройство, далее первая и вторая линии соединены в одну линию, на которой размещены второе редуцирующее устройство и дефлегматор, соединенный с первым рекуперационным теплообменником линией газа низкого давления, которая образована линией подачи метансодержащего газа и линией подачи газа дефлегмации с расположенным на ней третьим редуцирующим устройством, кроме того, дефлегматор соединен с зоной питания деметанизатора линией подачи флегмы с расположенными на ней четвертым редуцирующим устройством, выветривателем, оснащенным линией подачи газа выветривания в линию газа низкого давления перед дефлегматором, насосом, охлаждающим устройством верхней секции деметанизатора и вторым рекуперационным теплообменником, при этом деметанизатор оборудован линией вывода углеводородов C2+ и линией подачи метансодержащего газа.2. Installation of low-temperature reflux NTD for processing natural gas to produce C 2+ hydrocarbons, equipped with high-pressure and low-pressure gas lines, including two recuperation heat exchangers, a reflux condenser, a stabilization unit and reducing devices, characterized in that a demethanizer with a top cooled unit is installed as a stabilization unit and lower heated sections and a power zone between them, at least one of the reducing devices is made in the form of an expander, kinematically and / or electrically connected to the compressor, the high-pressure gas line is divided into two lines, the first is equipped with a first recovery heat exchanger, and the second is equipped with a compressor, a refrigerator, a second recovery heat exchanger and a first reducing device, then the first and second lines are connected in one line, on which the second a reducing device and a reflux condenser connected to the first recuperative heat exchanger by a low-pressure gas line, which is formed by a methane-containing gas supply line and a gas supply line for reflux with a third reducing device located on it, in addition, the reflux condenser is connected to the demethanizer supply zone with a reflux line with a fourth reducing device located on it, a weathering device equipped with a weathering gas supply line to the low pressure gas line in front of the reflux condenser, a pump, a cooling device of the upper section a demethanizer and a second recovery heat exchanger, while the demethanizer is equipped with a C 2+ hydrocarbon discharge line and a methane-containing gas supply line.
RU2018131412A 2018-08-30 2018-08-30 Low temperature reflux plant for converting natural gas with production of hydrocarbons c2+ (versions) RU2682595C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2018131412A RU2682595C1 (en) 2018-08-30 2018-08-30 Low temperature reflux plant for converting natural gas with production of hydrocarbons c2+ (versions)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2018131412A RU2682595C1 (en) 2018-08-30 2018-08-30 Low temperature reflux plant for converting natural gas with production of hydrocarbons c2+ (versions)

Publications (1)

Publication Number Publication Date
RU2682595C1 true RU2682595C1 (en) 2019-03-19

Family

ID=65806017

Family Applications (1)

Application Number Title Priority Date Filing Date
RU2018131412A RU2682595C1 (en) 2018-08-30 2018-08-30 Low temperature reflux plant for converting natural gas with production of hydrocarbons c2+ (versions)

Country Status (1)

Country Link
RU (1) RU2682595C1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2705160C1 (en) * 2018-12-24 2019-11-05 Андрей Владиславович Курочкин Unit of low-temperature dephlegmation with rectification ltdr for complex gas treatment with generation of lng

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU710589A1 (en) * 1976-10-01 1980-01-25 Центральное конструкторское бюро нефтеаппаратуры Gas low-temperature separation unit
US4707170A (en) * 1986-07-23 1987-11-17 Air Products And Chemicals, Inc. Staged multicomponent refrigerant cycle for a process for recovery of C+ hydrocarbons
RU2144649C1 (en) * 1994-04-29 2000-01-20 Филлипс Петролеум Компани Process and device for liquefaction of natural gas
US6253574B1 (en) * 1997-04-18 2001-07-03 Linde Aktiengesellschaft Method for liquefying a stream rich in hydrocarbons
WO2001088447A1 (en) * 2000-05-18 2001-11-22 Phillips Petroleum Company Enhanced ngl recovery utilizing refrigeration and reflux from lng plants
RU2317497C2 (en) * 2002-06-14 2008-02-20 Линде Акциенгезельшафт Method of liquefaction of the stream of the natural gas rich with the hydrocarbons with the simultaneous extraction of c3+ rich fraction with the high yield
EP2054685A2 (en) * 2006-08-23 2009-05-06 Shell Internationale Research Maatschappij B.V. Method and apparatus for treating a hydrocarbon stream
RU2543867C1 (en) * 2014-01-09 2015-03-10 Андрей Владиславович Курочкин Method of low temperature gas separation
RU2624710C1 (en) * 2016-10-11 2017-07-05 Андрей Владиславович Курочкин Gas treatment plant

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU710589A1 (en) * 1976-10-01 1980-01-25 Центральное конструкторское бюро нефтеаппаратуры Gas low-temperature separation unit
US4707170A (en) * 1986-07-23 1987-11-17 Air Products And Chemicals, Inc. Staged multicomponent refrigerant cycle for a process for recovery of C+ hydrocarbons
RU2144649C1 (en) * 1994-04-29 2000-01-20 Филлипс Петролеум Компани Process and device for liquefaction of natural gas
US6253574B1 (en) * 1997-04-18 2001-07-03 Linde Aktiengesellschaft Method for liquefying a stream rich in hydrocarbons
WO2001088447A1 (en) * 2000-05-18 2001-11-22 Phillips Petroleum Company Enhanced ngl recovery utilizing refrigeration and reflux from lng plants
RU2317497C2 (en) * 2002-06-14 2008-02-20 Линде Акциенгезельшафт Method of liquefaction of the stream of the natural gas rich with the hydrocarbons with the simultaneous extraction of c3+ rich fraction with the high yield
EP2054685A2 (en) * 2006-08-23 2009-05-06 Shell Internationale Research Maatschappij B.V. Method and apparatus for treating a hydrocarbon stream
RU2543867C1 (en) * 2014-01-09 2015-03-10 Андрей Владиславович Курочкин Method of low temperature gas separation
RU2624710C1 (en) * 2016-10-11 2017-07-05 Андрей Владиславович Курочкин Gas treatment plant

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2705160C1 (en) * 2018-12-24 2019-11-05 Андрей Владиславович Курочкин Unit of low-temperature dephlegmation with rectification ltdr for complex gas treatment with generation of lng

Similar Documents

Publication Publication Date Title
RU2668896C1 (en) Plant for the deethanization of natural gas (options)
RU2717668C1 (en) Low-temperature fractionation unit for complex gas treatment and production of lng
RU2017126023A (en) HEAVY-HYDROCARBON REMOVAL SYSTEM FOR LIQUIDATION OF THE POOLED NATURAL GAS
RU2658010C2 (en) Methods for separating hydrocarbon gases
RU2734237C1 (en) Apparatus for complex gas treatment by low-temperature condensation
RU2724739C1 (en) Low-temperature condensation unit
RU2705160C1 (en) Unit of low-temperature dephlegmation with rectification ltdr for complex gas treatment with generation of lng
RU2682595C1 (en) Low temperature reflux plant for converting natural gas with production of hydrocarbons c2+ (versions)
RU2681897C1 (en) Installation of low-temperature separation with ntsd dephlegmation for processing natural gas with extracting hydrocarbons c2+ (options)
RU2696375C1 (en) Plant for producing hydrocarbons c2+ from natural gas (versions)
CN104246400A (en) Fractionation process and associated apparatus for fractionation of cracked gas streams to obtain ethylene-rich fractions and fuel streams
RU2729611C1 (en) Apparatus for processing apg with obtaining pbf (versions)
RU2697330C1 (en) Apparatus for producing hydrocarbons c2+ by processing natural gas (versions)
RU2685098C1 (en) Hydrocarbon c2+ extraction unit from natural gas (versions)
RU2697328C1 (en) Unit for extraction of hydrocarbon c2+ from natural gas (versions)
RU2703132C1 (en) Plant for low-temperature separation with dephlegmation ltsd to obtain hydrocarbons c2+ from natural gas (versions)
RU2694735C1 (en) Plant of low-temperature separation with fractionating absorption ltsfa for processing of natural gas with extraction of hydrocarbons c2+ (versions)
RU2694731C1 (en) Low-temperature fractionating absorption plant for processing natural gas with extraction of hydrocarbons c2+ (versions)
RU2730291C1 (en) Low-temperature fractionation unit for complex gas treatment
RU2729427C1 (en) Oil-associated gas processing plant for obtaining natural gas liquids (embodiments)
RU2694746C1 (en) Plant for production of hydrocarbons c2+ from natural gas (versions)
RU2685101C1 (en) Apparatus for low-temperature separation with dephlegmation of ltsd for extraction of hydrocarbons c2+ from natural gas (versions)
RU2739039C1 (en) Unit for preparation of associated petroleum gas with production of wide fraction of light hydrocarbons (versions)
RU2726369C1 (en) Low-temperature dephlegmation with rectification plant for production of hydrocarbons c2+ from main natural gas (versions)
RU2740201C2 (en) Deethanization unit of natural gas