EP4038331A1 - Natural gas processing plant - Google Patents

Natural gas processing plant

Info

Publication number
EP4038331A1
EP4038331A1 EP20797363.7A EP20797363A EP4038331A1 EP 4038331 A1 EP4038331 A1 EP 4038331A1 EP 20797363 A EP20797363 A EP 20797363A EP 4038331 A1 EP4038331 A1 EP 4038331A1
Authority
EP
European Patent Office
Prior art keywords
natural gas
refrigerant
processing plant
pressure
block
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.)
Pending
Application number
EP20797363.7A
Other languages
German (de)
English (en)
French (fr)
Inventor
Thomas MERKER
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.)
GasNet sro
Original Assignee
GasNet sro
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 GasNet sro filed Critical GasNet sro
Publication of EP4038331A1 publication Critical patent/EP4038331A1/en
Pending legal-status Critical Current

Links

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
    • F25J1/0002—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
    • F25J1/0047—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 an "external" refrigerant stream in a closed vapor compression cycle
    • F25J1/005—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 an "external" refrigerant stream in a closed vapor compression cycle by expansion of a gaseous refrigerant stream 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
    • F25J1/006—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the refrigerant fluid used
    • F25J1/007—Primary atmospheric gases, mixtures thereof
    • F25J1/0072—Nitrogen
    • 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
    • F25J1/0203—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 a single-component refrigerant [SCR] fluid in a closed vapor compression cycle
    • F25J1/0204—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 a single-component refrigerant [SCR] fluid in a closed vapor compression cycle as a single flow SCR cycle
    • 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
    • F25J1/0232—Coupling of the liquefaction unit to other units or processes, so-called integrated processes integration within a pressure letdown station of a high pressure pipeline 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
    • F25J1/0244—Operation; Control and regulation; Instrumentation
    • F25J1/0245—Different modes, i.e. 'runs', of operation; Process control
    • F25J1/0249—Controlling refrigerant inventory, i.e. composition or quantity
    • F25J1/025—Details related to the refrigerant production or treatment, e.g. make-up supply from feed gas itself
    • 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.
    • F25J1/0281—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc. characterised by the type of prime driver, e.g. hot gas expander
    • F25J1/0283—Gas turbine as the prime mechanical driver
    • 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
    • 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.
    • F25J1/0292—Refrigerant compression by cold or cryogenic suction of the refrigerant 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
    • F25J1/02—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.
    • F25J1/0296—Removal of the heat of compression, e.g. within an inter- or afterstage-cooler against an ambient heat sink
    • F25J1/0297—Removal of the heat of compression, e.g. within an inter- or afterstage-cooler against an ambient heat sink using an externally chilled fluid, e.g. chilled water
    • 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
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/42—Nitrogen
    • 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
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/04—Compressor cooling arrangement, e.g. inter- or after-stage cooling or condensate removal
    • 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
    • F25J2240/00—Processes or apparatus involving steps for expanding of process streams
    • F25J2240/90—Hot gas waste turbine of an indirect heated gas for power generation
    • 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
    • F25J2270/90—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration
    • F25J2270/904—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration by liquid or gaseous cryogen in an open loop

Definitions

  • the invention relates to a plant for the treatment of natural gas, specifically to a plant for the treatment of natural gas comprising liquefaction.
  • the cooled gas stream is then comes into contact with a second cooling circuit in the heat exchanger consisting of at least one cooling stage, thereby lowering the temperature of the cooled gas stream to produce a methane-rich liquid product at a temperature above approximately -112 °C and a pressure sufficient to do so. to obtain a liquid product at or below the bubble boiling point.
  • a second cooling circuit in the heat exchanger consisting of at least one cooling stage, thereby lowering the temperature of the cooled gas stream to produce a methane-rich liquid product at a temperature above approximately -112 °C and a pressure sufficient to do so. to obtain a liquid product at or below the bubble boiling point.
  • the disadvantage of this method is the high internal energy consumption for the operation of the device that performs it.
  • the object of the invention is the design of a device for processing natural gas by liquefying it, which will have significantly lower operating costs.
  • a natural gas processing plant specifically a natural gas processing plant comprising at least one liquefaction block which comprises a natural gas intake, a liquefier, a circuit of refrigerant and an outlet for the liquified gas, which according to the invention, is characterised by that the liquefaction block is connected to at least one block for reducing the pressure of the flowing natural gas to obtain cold energy from the pressure-reduced natural gas.
  • the advantage is that cold energy is recovered, which comes from reducing the pressure of the natural gas flow, especially in reduction stations in natural gas transmission or distribution networks or in the process of discharging gas from a natural gas storage tank, through valves or systems for gas expansion, or is otherwise obtained from already refrigerated natural gas, and its use in liquefying natural gas, which is drawn from the distribution network, for liquefied natural gas, while simultaneously reducing electricity consumption in the liquefaction process by using cold energy obtained by natural gas expansion.
  • the advantage is that cold energy which is easily exploited, causes problems in natural gas reduction stations during the reduction of the gas flow, such as the formation of solid methane-hydrates. Cold energy is used to save on the overheads of the natural gas liquefaction plant, as well as on the cost of preheating this flowing natural gas, which would be required to prevent the formation of solid methane-hydrates.
  • the block for reducing the pressure of the flowing natural gas comprises at least one expansion turbine which is connected by its at least one first outlet of the pressure-reduced natural gas to at least one heat exchanger which is part of the liquefaction block.
  • the liquefaction block further comprises a natural gas cleaning device, which is arranged on the natural gas intake before it enters the liquefier.
  • a natural gas cleaning device which is arranged on the natural gas intake before it enters the liquefier.
  • the at least one heat exchanger be located at the natural gas intake to the liquefier, most advantageously the heat exchanger being arranged between the natural gas purifier and the liquefier.
  • At least one heat exchanger is located on the refrigerant circuit, thus easily enabling the supply of cold energy from natural gas pressure reduction, and at the same time the reduced pressure natural gas is heated, which reduces complications caused by its low temperature during its distribution.
  • the block for reducing the pressure of the flowing natural gas further comprises a device for removing water from the natural gas, which is arranged before the expansion turbine on the natural gas intake.
  • the refrigerant circuit further comprises a refrigerant expansion turbine and at least one refrigerant compression device, which is a recycling compressor, and/or a secondary compressor, and/or a booster compressor.
  • a refrigerant expansion turbine and at least one refrigerant compression device, which is a recycling compressor, and/or a secondary compressor, and/or a booster compressor.
  • a liquifier is arranged on the refrigerant circuit, in the direction of movement of the refrigerant, which is connected to a recycling compressor which is connected to a heat exchanger which is connected to a secondary compressor which is connected to another heat exchanger which is connected to a booster compressor, which is connected to another heat exchanger, which is connected to a liquidiser.
  • the liquefier also comprises at least one exchanger arranged simultaneously on the refrigerant circuit in the direction of refrigerant movement, which is connected to a refrigerant expansion turbine arranged outside the liquefier which is connected to a liquefaction exchanger arranged within the liquefier.
  • the refrigerant expansion turbine is, by a shaft, connected to a booster compressor.
  • the advantage is a simple design solution that further reduces the energy consumption required for liquefaction.
  • the energy transfer from the refrigerant expansion turbine to the booster compressor can be solved such that the expansion turbine is connected to an electric energy generator, which is led to the booster compressor to its drive.
  • the liquefaction block further comprises a refrigerant refill line which is connected to the refrigerant circuit to make up for refrigerant losses in the refrigerant expansion turbine.
  • the refrigerant refill line is connected to the refrigerant circuit in at least one refrigerant expansion device.
  • the refrigerant expansion device is a secondary compressor and/or a recycling compressor to which a refrigerant refill line is connected.
  • the refrigerant refill line first passes through the liquidiser refrigerant exchanger.
  • the advantage is that the supplied refrigerant medium is in liquid form, while during its conversion into the gas phase, a release of cold energy results, which is advantageously exploited for further pre-cooling of the refrigerant medium before it enters the liquefaction process.
  • the expansion turbine arranged within the block for reducing the pressure of the flowing natural gas, is connected by a shaft to a secondary compressor arranged within the liquefaction block.
  • the energy transfer from the expansion turbine to the secondary compressor can again be solved by connecting the expansion turbine to an electric power generator, which is led to the secondary compressor to its drive.
  • the most advantageous refrigerant medium is nitrogen.
  • the natural gas processing plant further comprises at least one further independent block for reducing the pressure of the flowing natural gas.
  • the advantage is that it is possible to ensure a stable flow of supplied natural gas to at least one block for reducing the pressure of flowing natural gas, and that independently of seasonal changes in the size of the outgoing stream of pressure reduced natural gas, stable production of liquefied natural gas is ensured including periods when the total natural gas inflow is higher than the planned size of the natural gas flow through the pressure reducing block of the flowing natural gas and the liquefaction block, with the flow exceeding this planned size being directed to another independent pressure reducing block for the flowing natural gas.
  • the main advantage of the natural gas processing plant according to the invention is that it uses otherwise unused or even harmful cold energy which is generated during the natural gas pressure reduction process at natural gas pressure reduction stations usually located at the interface between high pressure and medium pressure or low pressure flow in the distribution or transmission networks of natural gas.
  • Another advantage is the possibility of producing liquefied natural gas even in areas remote from the liquefied natural gas terminals at competitive prices for natural gas, which is taken from conventional transmission or distribution networks.
  • Another potential advantage of the natural gas processing plant according to the invention is that it can be used as part of a gas regulation station to stabilise gas flow in periods of lower and higher consumption, when at the moment of lower gas consumption, for example in summer, excess natural gas it is liquefied and stored in a tank from which it is released at the moment of increased consumption, for example in winter, while the flow of gas entering the control station can still remain the same.
  • the natural gas processing plant according to the invention brings significant economic savings. Compared to the known solutions, there are significant savings in electricity during the operation of the nitrogen system. Less energy is required because part of the cooling energy is provided by the cooled gas flow from the block for reducing pressure of the flowing natural gas.
  • a known liquefaction plant with a capacity of 25 tones of liquefied natural gas, using nitrogen as a refrigerant medium, has a specific electricity consumption of at least 0.56 kWh per Nm 3 of liquefied natural gas, consuming at least 0.10 Nm 3 of nitrogen per Nm 3 of liquefied natural gas.
  • the natural gas processing plant according to the invention makes it possible to reduce the specific electricity consumption for liquefaction of natural gas by approximately 75%, with a slight increase in nitrogen consumption by approximately 0.03 Nm 3 of nitrogen per Nm 3 of liquefied natural gas. Furthermore, it is also very advantageous from the point of view of the distribution network operator that a considerable amount of energy can be saved for preheating, because the natural gas flow from the pressure reduction block for flowing natural gas has, after passing through the heat exchangers, a temperature higher than the required 4°C
  • Fig. 1 shows shows a circuit comprising a liquefaction block and a block for reducing the pressure of flowing natural gas
  • Fig. 2 shows a circuit comprising a liquefaction block, a block for reducing pressure of flowing natural gas and another independent block for reducing pressure of flowing natural gas.
  • the natural gas processing plant (Fig. 1) comprises a liquefaction block 1, which comprises a high-pressure natural gas intake 10, a liquefier 1J_, a refrigerant circuit 12 which is nitrogen, and a liquefied gas outlet 13.
  • the liquefaction block 1 is connected to a block 2 for reducing the pressure of the flowing natural gas to obtain cold energy from the pressure-reduced natural gas.
  • the block 2 for reducing the pressure of flowing natural gas comprises an expansion turbine 4, which is connected by its first outlet 5 of pressure-reduced gas to four heat exchangers 6, 7, 8, 9, which are part of the liquefaction block 1
  • the expansion turbine 4 is further connected with its second outlet 34 connected to a reduction valve 35, which is further connected to a low-pressure natural gas outlet 24.
  • the block 2 for reducing the pressure of the flowing natural gas further comprises a device 15 for removing water from the natural gas, which is arranged before the expansion turbine 4 on the high-pressure natural gas intake 14.
  • the liquefaction block 1 further comprises a natural gas cleaning device 16, which is arranged on the high-pressure natural gas intake 10 before it enters the liquefier 11.
  • a heat exchanger 6 is arranged between the natural gas cleaning device 16 and the liquefier H on the high- pressure natural gas intake 10 to the liquefier H.
  • the refrigerant circuit 12 further comprises a refrigerant expansion turbine 17 and three refrigerant compression devices 25, which are a recycling compressor 18, a secondary compressor 19, and a booster compressor 20.
  • a liquefier H Arranged on the refrigerant circuit 12 in the direction of movement of the refrigerant, is arranged a liquefier H, which is connected to a recycling compressor 18,25, which is connected to a heat exchanger 7, which is connected to a secondary compressor 19,25, which is connected to another a heat exchanger 8, which is connected to a booster compressor 20,25, which is connected to another heat exchanger 9, which is connected to the liquifier TT
  • the liquifier H comprises an exchanger 30 arranged simultaneously on the refrigerant circuit 12 in the direction of movement of the refrigerant, which is connected to an expansion turbine 17 of the refrigerant arranged outside the liquifier H, which is connected to a liquefier exchanger 31 arranged within the liquifier H.
  • the refrigerant expansion turbine 17 is connected by a shaft 23 to a booster compressor 20. According to a variant not shown, the refrigerant expansion turbine 17 can be connected to an electric generator, which is connected by an electrical line to the booster compressor drive 20.
  • the expansion turbine 4 arranged in the block 2 for reducing the pressure of the flowing natural gas, is connected by a shaft 22 to a secondary compressor 19 arranged in the liquefaction block 1 According to a variant not shown, this expansion turbine 4 can be connected to an electric generator, which is connected by an electrical line to the drive of the secondary compressor 19.
  • the liquefaction block 1 further comprises a refrigerant refill line 21 which is connected to the refrigerant circuit 2 to replenish the refrigerant losses, with the refrigerant refill line 21 first passing through the refrigerant exchanger 30 of the liquefierll.
  • the refrigerant refill line 21 is, on the refrigerant circuit 12, connected in two refrigeration medium expansion devices 25, which are a secondary compressor 19 and a recycling compressor 18.
  • the natural gas processing plant operates in such a way that natural gas is led to the block 2 for reducing the pressure of the flowing natural gas through a high- pressure intake 14, with the cold energy from the pressure reduction process being subsequently used as part of the cold energy required for liquefying the natural gas.
  • water is removed from the flow of this natural gas in the device 15 for removing water from natural gas, thus preventing its contents in the cooled natural gas from freezing during or after expansion in the expansion turbine 4.
  • the device 15 for removing water from natural gas removes water in the flow of natural gas and reduces its content to 1 ppm.
  • the dry natural gas is led through the expansion turbine 4, with its pressure level decreasing from high pressure to medium pressure or low pressure- for example from pressure values of 80 to 40 bar to pressure values of 25 to 5 bar.
  • the temperature of the natural gas before the expansion turbine 4 fluctuates in the range of 4 o 20°C depending on the weather. Due to the adiabatic expansion, its temperature after expansion in the expansion turbine 4 reaches -40 to -25°C, while the higher the pressure ratio is at the gas intake on one side of the expansion turbine 4 and at the gas outlet behind the expansion turbine 4 on the other side, the lower are the temperatures reached.
  • the cooled natural gas flow enters the heat exchangers 6, 7, 8, 9 with a temperature of -40 to -25°C, while carrying the cold energy from the cooled natural gas flow from the block 2 for reducing the pressure of the flowing natural gas to the heat exchanger 6 for cooling the natural gas before entering the liquefier H, and in parallel via three heat exchangers 7,8,9 to the refrigerant medium, which is nitrogen, circulating in the refrigerant circuit 12 which is part of the liquefaction block 1, thereby pre-cooling the nitrogen before entering the liquefier H.
  • the refrigerant medium which is nitrogen
  • the refrigerant circuit 12 ensures repeated compression and expansion of the nitrogen, which reaches temperatures below -140°C in the gaseous state, at a pressure of 3 to 5 bar.
  • the natural gas stream to be liquefied first enters a natural gas purification device 16, in which CO2 and water, as well as other impurities in the natural gas stream, are removed. This prevents the freezing of C0 2 residues and water in the natural gas during the expansion and liquefaction process.
  • the natural gas flow is pre-cooled by passing the gas through a heat exchanger 6, with the temperature of the natural gas falling from 4 to 20°C to -30 to -15°C.
  • the natural gas stream enters the liquefier H, with the nitrogen gas in the liquefaction exchanger 34 transferring cold energy to it, whereby liquefied natural gas is formed, which exits the liquefier 1_1 at a temperature of -145 to -155 °C.
  • the devices arranged on the refrigerant circuit 12 operate in such a way that nitrogen gas circulates through the refrigerant circuit 12, with the nitrogen gas at -70°C to -60°C expanding in the refrigerant expansion turbine 17, reaching a temperature of -150°C to -140°C, with its outlet pressure from the expansion turbine 17 ranging from 3 bar to 5 bar. Nitrogen gas is then led in the liquefaction exchanger 31 to the reverse flow with the flow of natural gas.
  • the temperature of the nitrogen gas is increased by the liquefaction exchanger 31 from -150 to -140°C to -15 to -30°C, the temperature of the natural gas decreases from -15 to 30°C to -145 to -155°C, thus causing its liquefaction.
  • Nitrogen gas after transmitting the cold energy of the natural gas flow in the liquefaction exchanger 31, leaves the liquefier H at a temperature of -15 to -30°C and a pressure of 3 to 5 bar, and is sent to the suction of a recycling compressor 18 which pressurises the nitrogen gas to a pressure of 5 to 10 bar, at a temperature of +40 to +60°C. Nitrogen gas further enters the heat exchanger 7, in which its temperature drops from 40 to 60°C to -15 to -5°C. This ensures a lower nitrogen intake temperature to the secondary compressor 19, 25, which is further compressed to a pressure of 10 to 22 bar, at a temperature of +60 to +70°C.
  • Nitrogen gas further enters the heat exchanger 8, in which its temperature drops from 60 to 70°C to -15 to -5°C. This ensures a lower nitrogen intake temperature to the booster compressor 20, 25, which further compresses it to a pressure of 15 to 40 bar, at a temperature of +40 to + 50°C.
  • Nitrogen gas further enters the heat exchanger 9, in which its temperature drops from 40 to 50°C to -20 to -10°C. This ensures a lower nitrogen intake temperature to the liquefier 11
  • Nitrogen gas further enters the liquefier H, more precisely its exchanger 30, where due to the transfer of cold energy from the supplied liquid nitrogen and further the temperature of nitrogen gas circulating through the refrigerant circuit 12 it is reduced from values of -20 to -10°C to -70 to -60°C.
  • the liquefaction block further comprises an intake 33 of liquid refrigerant medium, which is liquid nitrogen, which enters at a flow rate of about 200 Nm 3 /h at a temperature of -170 to -175°C to the exchanger 30 of the liquefier U, in which the liquid nitrogen evaporates and from which it subsequently enters nitrogen gas with an average temperature of -20°C to the refill line 21, which leads it through the recycling compressor 18,25 and the secondary compressor 19.25, to the refrigerant circuit 12, to compensate for nitrogen leaks through the seals of the refrigerant expansion turbine 17, the recycle compressor 18, the secondary compressor 19, and the booster compressor 20.
  • liquid refrigerant medium which is liquid nitrogen
  • the liquefaction block further comprises an intake 33 of liquid refrigerant medium, which is liquid nitrogen, which enters at a flow rate of about 200 Nm 3 /h at a temperature of -170 to -175°C to the exchanger 30 of the liquefier U, in which the liquid nitrogen evaporates and from which it subsequently enters nitrogen
  • the temperature of the natural gas in the flow from the natural gas pressure reduction block 2 in the heat exchanger 6 increases from -40 to -25°C to 0 to 10°C, while the temperature of the gas flow entering the liquefier JM decreases from 4 to 20°C to -30 to -15°C.
  • the temperature of the natural gas in the flow from the natural gas pressure reduction block 2 increases in the heat exchanger 7 from -40 to -25 °C to 30 to 50°C, while the nitrogen temperature decreases from +40 to +60°C to -15 to -5°C.
  • the temperature of the natural gas in the flow the natural gas pressure reduction block 2 increases in the heat exchanger 8 from -40 to -25 °C to +40 to +55°C, while the nitrogen temperature decreases from +60 to +70 °C at -15 to -5°C.
  • the temperature of the natural gas in the low from the natural gas pressure reduction block 2 increases in the heat exchanger 9 from -40 to -25°C to 25 to 40°C, while the nitrogen temperature decreases from 40 to 50°C to -20 to -10°C.
  • the natural gas processing device (Fig. 2) comprises a liquefaction block 1, which comprises a high-pressure natural gas intake 10, a liquefier H, a refrigerant circuit 12, which is nitrogen, and a liquefied gas outlet 13.
  • the liquefaction block 1 is connected to a block 2 for reducing the pressure of the flowing natural gas to obtain cold energy from the pressure-reduced natural gas.
  • the block 2 for reducing the pressure of flowing natural gas comprises an expansion turbine 4, which is connected by its first outlet 5 of pressure-reduced gas to four heat exchangers 6, 7, 8, 9, which are part of the liquefaction block 1
  • the expansion turbine 4 is further, to its second outlet 34. connected to a reduction valve 35, which is further connected to a low-pressure natural gas outlet 24.
  • the block 2 for reducing the pressure of the flowing natural gas further comprises a device 15 for removing water from the natural gas, which is arranged before the expansion turbine 4 on the high-pressure natural gas intake 14.
  • the liquefaction block further comprises a natural gas cleaning device 16, which is arranged on the high-pressure natural gas intake 10 before it enters the liquefier 11.
  • a heat exchanger 6 is arranged between the natural gas cleaning device 16 and the liquefier 1 on the high- pressure natural gas intake 10 to the liquefier H.
  • the refrigerant circuit 12 further comprises a refrigerant expansion turbine 17 and three refrigerant compression devices 25, which are a recycling compressor 18, a secondary compressor 19, and a booster compressor 20.
  • a liquefier H Arranged on the refrigerant circuit 12, in the direction of movement of the refrigerant, is arranged a liquefier H, which is connected to a recycling compressor 18, 25, which is connected to a heat exchanger 7, which is connected to a secondary compressor 19,25, which is connected to another a heat exchanger 8, which is connected to a booster compressor 20,25, which is connected to another heat exchanger 9, which is connected to the liquifier 11
  • the liquifier H comprises an exchanger 30 arranged simultaneously on the refrigerant circuit 12 in the direction of movement of the refrigerant, which is connected to an expansion turbine 17 of the refrigerant arranged outside the liquifier H, which is connected to a liquefier exchanger 31 arranged within the liquifier 11
  • the refrigerant expansion turbine 17 is connected by a shaft 23 to a booster compressor 20. According to a variant not shown, the refrigerant expansion turbine 17 can be connected to an electric generator, which is connected by an electrical line to the booster compressor drive 20.
  • the expansion turbine 4 arranged in the block 2 for reducing the pressure of the flowing natural gas, is connected by a shaft 22 to a secondary compressor 19 arranged in the liquefaction block 1 According to a variant not shown, this expansion turbine 4 can be connected to an electric generator, which is connected by an electrical line to the drive of the secondary compressor 19.
  • the liquefaction block 1 further comprises a refrigerant refill line 21 which is connected to the refrigerant circuit 12 to replenish the refrigerant losses, with the refrigerant refill line 21 first passing through the refrigerant exchanger 30 of the liquefier 11
  • the refrigerant refill line 21 is, on the refrigerant circuit 12 connected in two refrigeration medium expansion devices 25, which are a secondary compressor 19 and a recycling compressor 18.
  • the natural gas processing plant further comprises one further independent block 3 for reducing the pressure of the flowing natural gas.
  • the natural gas processing plant operates in the same way as the plant of Example 1, and in addition operates in the independent block 3 to reduce the pressure of the flowing natural gas so that while a stable gas flow is passed through high pressure intakes 10,14 to the liquefaction block 1 and to the reduction block 2 for pressure of the flowing natural gas, the remaining gas volume flow exceeding the proposed flow through the liquefaction block 1 is led by a high pressure natural gas intake 29 through a preheater 27 to an expansion turbine 26, which is connected to a generator 28. If the gas flow exceedance is relatively small, it is utilised to perform the gas pressure reduction instead of the expansion turbine’s 26 throttle valve 32.
  • the throttle valve 32 also serves as a backup solution for bypassing the gas around the expansion turbine 26 in case of emergency, expansion system repairs, or other situations where operation is not possible.
  • the preheater 27 is installed to prevent undesired freezing of water and condensation of heavy hydrocarbons in the expanded natural gas.
  • the natural gas processing plant according to the invention can in particular be used for the production of liquefied natural gas and for the production of natural gas with reduced pressure.

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)
EP20797363.7A 2019-10-04 2020-10-02 Natural gas processing plant Pending EP4038331A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ2019-618A CZ2019618A3 (cs) 2019-10-04 2019-10-04 Zařízení pro zpracování zemního plynu
PCT/CZ2020/000045 WO2021063429A1 (en) 2019-10-04 2020-10-02 Natural gas processing plant

Publications (1)

Publication Number Publication Date
EP4038331A1 true EP4038331A1 (en) 2022-08-10

Family

ID=73020017

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20797363.7A Pending EP4038331A1 (en) 2019-10-04 2020-10-02 Natural gas processing plant

Country Status (3)

Country Link
EP (1) EP4038331A1 (cs)
CZ (1) CZ2019618A3 (cs)
WO (1) WO2021063429A1 (cs)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3145032B1 (fr) 2023-01-16 2025-01-31 Air Liquide Installation et procédé de liquéfaction d'un flux de fluide

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6119479A (en) * 1998-12-09 2000-09-19 Air Products And Chemicals, Inc. Dual mixed refrigerant cycle for gas liquefaction
NO328852B1 (no) * 2008-09-24 2010-05-31 Moss Maritime As Fremgangsmate og system for behandling av gass
US20140157824A1 (en) * 2012-12-06 2014-06-12 L'air Liquide Societe Anonyme Pour I'etude Et I'exploitation Des Procedes Georges Claude Method for improved thermal performing refrigeration cycle
FR3002311B1 (fr) * 2013-02-20 2016-08-26 Cryostar Sas Dispositif de liquefaction de gaz, notamment de gaz naturel
GB2522421B (en) * 2014-01-22 2016-10-19 Dwight Maunder Anthony LNG production process
CN204063780U (zh) * 2014-06-24 2014-12-31 中国石油大学(北京) 一种结合氮膨胀制冷的管道气差压制冷液化装置
US20160061518A1 (en) * 2014-08-29 2016-03-03 Black & Veatch Holding Company Dual mixed refrigerant system
FR3053771B1 (fr) * 2016-07-06 2019-07-19 Saipem S.P.A. Procede de liquefaction de gaz naturel et de recuperation d'eventuels liquides du gaz naturel comprenant deux cycles refrigerant semi-ouverts au gaz naturel et un cycle refrigerant ferme au gaz refrigerant
US10605522B2 (en) * 2016-09-01 2020-03-31 Fluor Technologies Corporation Methods and configurations for LNG liquefaction
RU2656068C1 (ru) * 2017-07-06 2018-06-01 Юрий Васильевич Белоусов Способ сжижения природного газа на газораспределительной станции и установка для его осуществления

Also Published As

Publication number Publication date
CZ308591B6 (cs) 2020-12-16
WO2021063429A1 (en) 2021-04-08
CZ2019618A3 (cs) 2020-12-16

Similar Documents

Publication Publication Date Title
CN102959351B (zh) 液化方法、液化装置及具备该液化装置的浮式液化气制造设备
US6295833B1 (en) Closed loop single mixed refrigerant process
US11774173B2 (en) Arctic cascade method for natural gas liquefaction in a high-pressure cycle with pre-cooling by ethane and sub-cooling by nitrogen, and a plant for its implementation
JP3868998B2 (ja) 液化プロセス
US10605522B2 (en) Methods and configurations for LNG liquefaction
WO2003062723A1 (en) Self-refrigerated lng process
AU2002361762A1 (en) Self-refrigerated LNG process
CN212720484U (zh) 一种天然气液化系统
KR20070088631A (ko) 저온 액화 냉동 방법 및 장치
US20110094261A1 (en) Natural gas liquefaction core modules, plants including same and related methods
CN108779953A (zh) 用于液化天然气进料流的方法和系统
US20160003528A1 (en) Station for reducing gas pressure and liquefying gas
KR102034477B1 (ko) 천연가스 액화장치 및 액화방법, 그리고 천연가스 액화장치를 포함하는 천연가스 충전소
JP2001526376A (ja) 液化プロセスおよび装置
CN113983758A (zh) 带预冷的多级bog膨胀海上lng闪蒸气再液化装置和工艺
EP4038331A1 (en) Natural gas processing plant
US20180038639A1 (en) Robust recovery of natural gas letdown energy for small scale liquefied natural gas production
RU2753206C1 (ru) Способ автономного производства сжиженного природного газа и установка для его осуществления
KR102034476B1 (ko) 질소를 함유하는 천연가스 액화장치 및 액화방법, 그리고 천연가스 액화장치를 포함하는 천연가스 충전소
AU701955B2 (en) Method for cooling and/or liquefying a medium
CN101223410A (zh) 用于液化富烃流的方法
RU2740112C1 (ru) Способ сжижения природного газа "Полярная звезда" и установка для его осуществления
RU2784139C1 (ru) Установка получения сжиженного природного газа (варианты)
CN203980790U (zh) 用于天然气液化的卧式冷箱
CN119042932B (zh) 一种乙烷回收联产小处理量多温位液化天然气的方法

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

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

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

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

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

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20220412

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

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)