EP2713127A1 - Procédé destiné à liquéfier du gaz naturel - Google Patents

Procédé destiné à liquéfier du gaz naturel Download PDF

Info

Publication number
EP2713127A1
EP2713127A1 EP12186583.6A EP12186583A EP2713127A1 EP 2713127 A1 EP2713127 A1 EP 2713127A1 EP 12186583 A EP12186583 A EP 12186583A EP 2713127 A1 EP2713127 A1 EP 2713127A1
Authority
EP
European Patent Office
Prior art keywords
natural gas
gas stream
gaseous
gaseous natural
compressor
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP12186583.6A
Other languages
German (de)
English (en)
Inventor
Suhel Dr. Ahmad
Thomas Dr. Münster
Thomas-Dirk Pohlers
Attilla Yildiz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to EP12186583.6A priority Critical patent/EP2713127A1/fr
Publication of EP2713127A1 publication Critical patent/EP2713127A1/fr
Withdrawn legal-status Critical Current

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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0228—Coupling of the liquefaction unit to other units or processes, so-called integrated processes
    • F25J1/0229—Integration with a unit for using hydrocarbons, e.g. consuming hydrocarbons as feed stock
    • F25J1/0231—Integration with a unit for using hydrocarbons, e.g. consuming hydrocarbons as feed stock for the working-up of the hydrocarbon feed, e.g. reinjection of heavier hydrocarbons into the liquefied gas
    • 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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0022—Hydrocarbons, e.g. natural gas
    • 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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0032—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
    • F25J1/0035—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by gas expansion with extraction of work
    • 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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0032—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
    • F25J1/0035—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by gas expansion with extraction of work
    • F25J1/0037—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by gas expansion with extraction of work of a return 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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0032—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
    • F25J1/004—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by flash gas recovery
    • 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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0201—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using only internal refrigeration means, i.e. without external refrigeration
    • F25J1/0202—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using only internal refrigeration means, i.e. without external refrigeration in a quasi-closed internal refrigeration 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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0228—Coupling of the liquefaction unit to other units or processes, so-called integrated processes
    • F25J1/0229—Integration with a unit for using hydrocarbons, e.g. consuming hydrocarbons as feed stock
    • F25J1/023—Integration with a unit for using hydrocarbons, e.g. consuming hydrocarbons as feed stock for the combustion as fuels, i.e. integration with the fuel gas 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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
    • F25J1/0262—Details of the cold heat exchange 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
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
    • F25J1/0285—Combination of different types of drivers mechanically coupled to the same refrigerant compressor, possibly split on multiple compressor casings
    • F25J1/0288—Combination of different types of drivers mechanically coupled to the same refrigerant compressor, possibly split on multiple compressor casings using work extraction by mechanical coupling of compression and expansion of the refrigerant, so-called companders
    • 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
    • F25J2220/00—Processes or apparatus involving steps for the removal of impurities
    • F25J2220/60—Separating impurities from natural gas, e.g. mercury, cyclic hydrocarbons
    • F25J2220/64—Separating heavy hydrocarbons, e.g. NGL, LPG, C4+ hydrocarbons or heavy condensates in general
    • 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
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/02—Recycle of a stream in general, e.g. a by-pass stream

Definitions

  • the invention relates to a method for natural gas liquefaction, wherein the gas is at least partially liquefied with natural gas from a transport or collection system or a pretreatment plant and fed to a collection system for liquid natural gas.
  • Liquid natural gas also commonly referred to as liquefied natural gas (LNG for liquefied natural gas or GNL for natural gas Liquéfié)
  • LNG liquefied natural gas
  • GNL natural gas Liquéfié
  • Liquefied natural gas has about six hundredth of a specific volume of gaseous natural gas and is therefore also suitable for transport by road, rail or water.
  • Liquefaction is about 10% - 25% of the energy content of the gas, so that at a distance of less than 2000km between the natural gas source and the consumer a line-bound transport is so far more economical.
  • natural gas pipelines are often located at the center of political disputes and energy security of supply is a top priority, natural gas liquefaction capacities are being expanded worldwide.
  • the invention has taken on the task of creating a process for liquefaction of natural gas, which realizes a high efficiency with a compact construction possibility.
  • the invention should provide the opportunity to improve the quality of the generated liquid natural gas as needed and, for example, to separate long-chain components.
  • the invention proposes a method of the type mentioned above with the additional features of claim 1.
  • the independent claims contain advantageous developments of the invention.
  • the invention starts with the technical development presented at the outset and shows an energetically and technically particularly advantageous way of liquefying natural gas by means of a method which at the same time enables a cost-effective installation and a particularly compact design.
  • a central feature of the method according to the invention is the use of the actual process fluid, the natural gas, as a coolant for the heat exchangers for cooling to the required low temperatures, so that a subsequent cooling relaxation of the natural gas also causes the desired liquefaction process. Furthermore, a relaxation of the natural gas instead of exclusively with a Joule-Thompson valve, in particular by means of a turbo expander exclusively or at least carried out supportive, so that the temperatures drop to an even lower level and the liquefaction takes place more effectively.
  • the technical work generated by the expander can be used, in particular in the compression process of the compressor, which returns the diverted and expanded fluid of the sixth gaseous natural gas stream to the compressor Pressure level of the incoming natural gas before it mixes in the first turnout with the incoming natural gas.
  • One way to use the technical work of the expander is in a mechanical connection between the compressor or a part compressor and the expander by means of a continuous shaft or via a speed-changing gearbox. It makes sense to use a so-called gear compressor with expansion stage.
  • This type of construction involves a gearbox with a housing from which different shaft ends are led out and serve to drive a number of compressors flanged to the housing. At least one shaft is also guided out of the housing for the purpose of driving.
  • an expander is preferably connected to the shaft end and attached to the housing in addition to the drive instead of a compressor at a shaft end.
  • the expander drives a generator whose generated electrical energy is used in the overall system, in particular in the drive of the compressor.
  • the compressor is preferably designed as an intercooled compressor, wherein an intermediate cooling is provided between at least two stages.
  • the compressor may also comprise a plurality of partial compressors, wherein the expander, for example, exclusively drives a partial compressor and other partial compressors have other drives.
  • These other drives may be, for example, electric motors, steam turbines or gas turbines.
  • a gas turbine drives an electric generator and all other electrical consumers be supplied by the electrical energy generated by the generator.
  • the second heat exchanger third gaseous natural gas stream which initiates a separator, where a liquid second natural gas stream and a gaseous eighth natural gas stream from each other.
  • a third heat exchanger in which the eighth gaseous natural gas stream is introduced after the separation in the first separator and there further cools and possibly partially condensed.
  • the first, the second and the third heat exchanger are each cooled at least by a gaseous phase of the sixth gaseous volume flow.
  • the sixth gaseous volumetric flow flows through these three heat exchangers preferably as a coolant and is then fed to the compressor for compression in order to again mix with the incoming first gaseous natural gas flow at the same pressure level.
  • the separator system preferably comprises the phase division of the fourth gaseous natural gas stream emerging from the expander from a plurality of stages, preferably from at least two stages of the separation. In this way it is possible to carry out a fractionated separation and to sort at least partially liquid natural gas and possibly other components according to their chemical components.
  • the precipitating in a first separation step of the separation system liquid component mixture is often - depending on the initial state - unusable for a standard provision of liquefied natural gas and can be flared or otherwise used, for example.
  • the liquefied natural gas which precipitates as liquid in the second separation step according to an advantageous development of the invention does not meet the quality requirements for the common applications of various consumers.
  • the liquid-precipitating components of the separation in the first separator between the second heat exchanger and the third heat exchanger are particularly preferably subjected to continued fractional separation, wherein the long-chain hydrocarbons which are the first to precipitate as liquid components preferably in two expansion stages in the separators downstream of the expansion valves Quality of the liquefied natural gas and would therefore be collected separately for further recovery.
  • the resulting there from the heavy hydrocarbons purified gaseous natural gas, as in FIG. 2 shown as tenth gaseous natural gas stream introduced into the separator for the final production of the liquid natural gas.
  • FIGS. 1 to 3 show schematic flow diagrams in which the process fluid natural gas is subjected to various process steps according to the invention.
  • Gaseous natural gas VNG is removed by means of the method according to the invention from a transport or collection system VGS for the purpose of liquefaction.
  • This first gaseous natural gas flow VNS1 is in a first step with a sixth gaseous natural gas flow VNS6 in a first switch SW1 merged and forwarded as the second gaseous natural gas flow VNS2.
  • the second gaseous natural gas flow VNS2 is cooled in countercurrent to the sixth gaseous natural gas flow VNS6 in a first heat exchanger WT1 by means of a first heat exchanger with heat release. Subsequently, the second gaseous natural gas flow VNS2 is divided in a second switch SW2 into a third gaseous natural gas flow VNS3 and a fourth gaseous natural gas flow VNS4. The third gaseous natural gas flow VNS3 is then further cooled in a second heat exchanger WT2 with heat being released to the sixth gaseous natural gas flow VNS6.
  • the third gaseous natural gas flow VNS3 by means of a first Joule-Thompson valve JT1 in a separation system SEP, here shown as a simpler separator, relaxed, whereby a first liquid natural gas stream LNS1 is deposited and the sixth gaseous natural gas flow VNS6 arises.
  • the sixth gaseous natural gas flow VNS6 passes through the two heat exchangers WT2, WT1 in countercurrent to the second and third gaseous natural gas flows VNS2, VNS3 to be cooled.
  • the heated sixth gaseous natural gas flow VNS6 is conveyed back to the inlet pressure in a compressor CO and combined in the first switch SW1 with the inflowing first gaseous natural gas flow VNS1.
  • the fourth gaseous natural gas stream VNS4 separated from the second gaseous natural gas stream VNS2 is expanded in an expander EXP and cooled to such an extent that it can also be introduced into the separator system SEP with formation of liquefied natural gas, which from this separator is the first one liquid natural gas stream LNS1 is transported to a collection point LGS.
  • the expander EXP is in this case connected to a stage or a partial compressor CO1 of the compressor CO by means of a rigid shaft, so that the technical work from the expander is 100% used in the compression process of the compressor CO.
  • the compressor CO is driven by means of an electric motor M.
  • Alternative is also an electrical power generation on the expander conceivable and possibly the utilization of this energy in the compressor drive.
  • FIG. 2 in the upper area essentially the one already in FIG. 1 represented the process, wherein the individual separator of the separation system SEP in the preferred embodiment of FIG. 2 is replaced by an advanced separation system, which allows a qualitative treatment of the liquefied natural gas LNS or the first liquid natural gas flow LNS1 in the liquefied natural gas storage LGS.
  • the gaseous natural gas VNS3 emerging from the second heat exchanger WT2 is divided into a first separator SEP1 into a second liquid natural gas stream LNS2 and an eighth gaseous natural gas stream VNS8.
  • the second liquid natural gas stream LNS2 contains in this fractionated separation relatively many long-chain hydrocarbons HHC, which are deposited in the subsequent gradual continued separation.
  • the fourth separator SEP4 deposits on the gas side a seventh gaseous natural gas flow VNS7, which relaxes to a pressure level parallel to the third Joule-Thompson valve JT3 by means of a fourth Joule-Thompson valve JT4 a ninth gaseous natural gas flow VNS9 from the fifth separator with the seventh gaseous natural gas flow VNS7 is combined to form the tenth gaseous natural gas flow VNS10 by means of a third switch SW3.
  • the gaseous natural gas of the tenth gaseous natural gas flow VNS10 which is also cooled by the Joule-Thompson expansion by means of the fourth Joule-Thompson valve JT4, is fed to a second separation stage SEP2.2, where it mixes with other inflows.
  • a first separation stage SEP2.1 of this two-stage separation is fed with the gaseous fourth natural gas flow VNS4 from the expander EXP, whose liquid separation from this first separation stage SEP2.1 is supplied to a waste utilization WST.
  • the gaseous deposition of this first separation stage SEP2.1 is supplied to the downstream second separation stage SEP2.2 as the fifth gaseous natural gas flow VNS5.
  • a sixth Joule-Thompson valve JT6 is optionally arranged between the first separation stage SEP2.1 and the second separation stage SEP2.2 for expansion of the fifth gaseous natural gas flow VNS5, which may additionally promote liquefaction.
  • the eighth gaseous natural gas flow VNS8 is cooled in the third heat exchanger WT3 and also fed via a fifth Joule-Thompson valve JT5 directly into the second separation stage SEP2.2, so that in this second separation stage from the mixture of feeds, a first liquid natural gas stream LNS1 as liquefied natural gas end product LNS deposits for storage in the LGS deposit.
  • the gaseous fraction of this separation in the second separation stage SEP2.2 is the sixth gaseous natural gas flow VNS6, which is used in countercurrent to the cooling of the heat exchanger WT3, WT2, WT1.
  • FIG. 3 shows the composition of the hardware components of the second heat exchanger WT2, third heat exchanger WT3 and first separator SEP1 a little closer.
  • the third gaseous natural gas flow VNS3 enters the second heat exchanger WT2 and then cooled in the first separator SEP1 where it divides into a second liquid natural gas stream LNS2 and an eighth gaseous natural gas stream VNS8.
  • the eighth gaseous natural gas flow VNS8 gives additional heat to the downstream third heat exchanger WT3 that the two heat exchangers WT3, WT2 from countercurrent flowing gaseous natural gas of the sixth gas natural gas flow VNS6 from.

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)
  • Combustion & Propulsion (AREA)
  • Separation By Low-Temperature Treatments (AREA)
EP12186583.6A 2012-09-28 2012-09-28 Procédé destiné à liquéfier du gaz naturel Withdrawn EP2713127A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12186583.6A EP2713127A1 (fr) 2012-09-28 2012-09-28 Procédé destiné à liquéfier du gaz naturel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12186583.6A EP2713127A1 (fr) 2012-09-28 2012-09-28 Procédé destiné à liquéfier du gaz naturel

Publications (1)

Publication Number Publication Date
EP2713127A1 true EP2713127A1 (fr) 2014-04-02

Family

ID=47010310

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12186583.6A Withdrawn EP2713127A1 (fr) 2012-09-28 2012-09-28 Procédé destiné à liquéfier du gaz naturel

Country Status (1)

Country Link
EP (1) EP2713127A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113865266A (zh) * 2020-06-30 2021-12-31 气体产品与化学公司 液化系统

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000025060A1 (fr) * 1998-10-23 2000-05-04 Exxonmobil Upstream Research Company Procede de refrigeration destine a la liquefaction de gaz naturel
GB2486036A (en) * 2011-06-15 2012-06-06 Anthony Dwight Maunder Process for liquefying natural gas using low-pressure feed stream

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000025060A1 (fr) * 1998-10-23 2000-05-04 Exxonmobil Upstream Research Company Procede de refrigeration destine a la liquefaction de gaz naturel
GB2486036A (en) * 2011-06-15 2012-06-06 Anthony Dwight Maunder Process for liquefying natural gas using low-pressure feed stream

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113865266A (zh) * 2020-06-30 2021-12-31 气体产品与化学公司 液化系统
EP3943852A3 (fr) * 2020-06-30 2022-06-22 Air Products And Chemicals, Inc. Système de liquéfaction
US11499775B2 (en) 2020-06-30 2022-11-15 Air Products And Chemicals, Inc. Liquefaction system

Similar Documents

Publication Publication Date Title
DE4301100C2 (de) Verfahren zum Betrieb eines Kombikraftwerkes mit Kohle- oder Oelvergasung
EP1994344A1 (fr) Procédé et dispositif de décomposition de l'air à basse température
EP2880267B1 (fr) Procédé et dispositif pour produire de l'énergie électrique
DE19938216B4 (de) Verflüssigungsverfahren
EP2789958A1 (fr) Procédé de décomposition à basse température de l'air et installation de décomposition de l'air
EP3101374A2 (fr) Procede et installation cryogeniques de separation d'air
WO2014000882A2 (fr) Procédé et dispositif de production d'une énergie électrique
EP3129609A1 (fr) Procédé et installation pour l'accumulation et la récupération d'énergie
DE102007024168A1 (de) Verfahren und Vorrichtung zur Tieftemperatur-Luftzerlegung
DE102009015411A1 (de) Verfahren und Einrichtung zum Betrieb einer Antriebsmaschine für ein Schiff zum Transport von Flüssiggas
EP3129613B1 (fr) Procédé et installation pour l'accumulation et la récupération d'énergie
EP2604824A1 (fr) Procédé et installation pour la production d'énergie électrique
EP1892457B1 (fr) Procédé et dispositif destinés à l'enregistrement de gaz combustible, en particulier de gaz naturel
DE102014012316A1 (de) Verfahren zum Abkühlen einer Kohlenwasserstoff-reichen Fraktion
DE102012017654A1 (de) Verfahren und Vorrichtung zur Stickstoffverflüssigung
DE102012020469A1 (de) Verfahren und Vorrichtung zur Abtrennung von Methan aus einem Synthesegas
EP2713127A1 (fr) Procédé destiné à liquéfier du gaz naturel
DE102013002094A1 (de) Verfahren zur Produktion von Luftprodukten und Luftzerlegungsanlage
DE102009004109A1 (de) Verfahren zum Verflüssigen einer Kohlenwasserstoff-reichen Fraktion
EP3034974A1 (fr) Procédé et installation de liquéfaction d'air et de stockage et de récupération d'énergie électrique
DE102012020470A1 (de) Verfahren und Vorrichtung zur Abtrennung von Methan aus einem Synthesegas
DE202021002895U1 (de) Anlage zur Tieftemperaturzerlegung von Luft
DE102015007529A1 (de) Verfahren und Anlage zur Abtrennung von Methan aus einem methanhaltigen Synthesegasstrom
EP3361197A1 (fr) Procédé de liquéfaction d'une fraction riche en hydrocarbures
DE102005024106A1 (de) Verfahren zur Tieftemperaturzerlegung eines kohlenwasserstoffhaltigen Stoffstromes

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20141003