WO2018087471A1 - Procédé de séparation cryogénique d'un courant de gaz naturel - Google Patents
Procédé de séparation cryogénique d'un courant de gaz naturel Download PDFInfo
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- WO2018087471A1 WO2018087471A1 PCT/FR2017/053045 FR2017053045W WO2018087471A1 WO 2018087471 A1 WO2018087471 A1 WO 2018087471A1 FR 2017053045 W FR2017053045 W FR 2017053045W WO 2018087471 A1 WO2018087471 A1 WO 2018087471A1
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- column
- stream
- absorption column
- distillate
- fractionation column
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- 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
- F25J3/06—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation
- F25J3/0605—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the feed stream
- F25J3/061—Natural gas or substitute natural gas
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- 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
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G5/00—Recovery of liquid hydrocarbon mixtures from gases, e.g. natural gas
- C10G5/06—Recovery of liquid hydrocarbon mixtures from gases, e.g. natural gas by cooling or compressing
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- 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
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- 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
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- 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
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- 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
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- 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
- F25J3/0242—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 3 carbon atoms or more
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- F25J3/0635—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the separated product stream separation of CnHm with 1 carbon atom or more
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- 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
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- F25J3/063—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the separated product stream
- F25J3/064—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the separated product stream separation of CnHm with 2 carbon atoms or more
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- 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
- F25J3/06—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation
- F25J3/063—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the separated product stream
- F25J3/0645—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the separated product stream separation of CnHm with 3 carbon atoms or more
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- 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
- F25J3/06—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation
- F25J3/063—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the separated product stream
- F25J3/065—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by partial condensation characterised by the separated product stream separation of CnHm with 4 carbon atoms or more
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/10—Feedstock materials
- C10G2300/1025—Natural gas
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2400/00—Products obtained by processes covered by groups C10G9/00 - C10G69/14
- C10G2400/26—Fuel gas
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- 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
- F25J2200/02—Processes or apparatus using separation by rectification in a single pressure main column system
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- 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
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- 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
- F25J2200/70—Refluxing the column with a condensed part of the feed stream, i.e. fractionator top is stripped or self-rectified
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- 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
- F25J2200/74—Refluxing the column with at least a part of the partially condensed overhead gas
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- 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
- F25J2200/78—Refluxing the column with a liquid stream originating from an upstream or downstream fractionator column
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- 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
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- 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
- F25J2205/10—Processes or apparatus using other separation and/or other processing means using combined expansion and separation, e.g. in a vortex tube, "Ranque tube" or a "cyclonic fluid separator", i.e. combination of an isentropic nozzle and a cyclonic separator; Centrifugal separation
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- 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
- F25J2210/60—Natural gas or synthetic natural gas [SNG]
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- 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
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- 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
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- 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
- F25J2250/00—Details related to the use of reboiler-condensers
- F25J2250/02—Bath type boiler-condenser using thermo-siphon effect, e.g. with natural or forced circulation or pool boiling, i.e. core-in-kettle heat exchanger
Definitions
- the present invention relates to a process for cryogenically separating a natural gas feed stream into a gas containing the most volatile feed stream compounds and a liquid product containing the heavier compounds of the feed stream.
- NTL natural gas-associated liquids
- NGL Natural Gas Liquids
- natural gas for example such as ethane, butane, propane, hydrocarbons C5 + and C6 + (ie that is, having at least five carbon atoms and having more than six carbon atoms).
- One of the most effective is a method using a two-column turbo-expansion valve in which the first column is a dedicated absorber to push propane recovery as much as possible and the second column is a de-ethanizer.
- Condensation of the flow at the de-ethanizer head is often done in part with the fluid from the absorber vessel. This fluid leaves partially vaporized to enter the main exchange line requiring a diphasic introduction.
- the subject of the present invention is a process for the cryogenic separation of a feed stream of natural gas into a gas containing the most volatile compounds of the feed stream and a liquid product containing the heavier compounds of the feed stream. feeding, comprising at least the following steps:
- the subject of the invention is also:
- a process as defined above characterized in that it comprises a step prior to step d) of condensing the distillate from the top of the fractionation column in a third heat exchanger system.
- a process as defined above characterized in that the entire gaseous stream produced at the top of the absorption column resulting from step b) is used to condense in the second heat exchange system , the distillate from the head of the fractionation column.
- a process as defined above characterized in that the gaseous stream produced at the top of the absorption column resulting from stage b) is separated into several streams, at least one of which is used to condense, in the second heat exchange system, the distillate from the head of the fractionation column.
- a process as defined above characterized in that the liquid phase of the condensed distillate from step c) is used as reflux at the top of the fractionation column.
- the solutions of the method that is the subject of the present invention make it possible to eliminate the two-phase inlet, or at least limit it to a very high LA / (liquid / vapor) ratio, of the stream taken in the absorption column vat before the introduce into a main heat exchange system prior to its introduction into the fractionation column.
- Solution A The unique use of the flow of the head of the absorption column to condense the flow of the head of the fractionation column in a dedicated exchanger has particular advantages: the suppression of the two-phase inlet of the current withdrawn in tank of absorption column in the main exchange line: and the limitation of the discharge pressure of the pump at the outlet of the tank of the absorption column.
- Solution B Separation of the fluid at the top of the absorption column into several streams, at least one of which provides condensation in the condenser at the top of the fractionation column: this gives rise to better regulation of the fractionation column top condenser.
- the hydrocarbon stream to be liquefied is typically a stream of natural gas obtained from natural gas fields, oil reservoirs or a domestic gas network distributed via pipelines.
- the flow of natural gas is essentially composed of methane.
- the feed stream comprises at least 80 mol% of methane.
- natural gas contains quantities of hydrocarbons heavier than methane, such as, for example, ethane, propane, butane and pentane, as well as certain aromatic hydrocarbons.
- the natural gas stream also contains non-hydrocarbon products such as H2O, N2, CO2, H2S and other sulfur compounds, mercury and others.
- the feed stream containing the natural gas is thus pretreated before being introduced into the heat exchanger allowing the first cooling step of the method that is the subject of the present invention.
- This pretreatment includes reducing and / or eliminating undesirable components such as CO2 and H2S, or other steps such as pre-cooling and / or pressurizing. Since these measurements are well known to those skilled in the art, they are not further detailed here.
- natural gas refers to any composition containing hydrocarbons including at least methane. This includes a "raw” composition (prior to any treatment or wash), as well as any composition that has been partially, substantially, or wholly processed for the reduction and / or elimination of one or more compounds, including but not limited to limit, sulfur, carbon dioxide, water, mercury and some heavy and aromatic hydrocarbons.
- the heat exchanger can be any heat exchanger, unit or other arrangement adapted to allow the passage of a number of flows, and thus allow at least one direct or indirect heat exchange system between one or more lines of heat. refrigerant, and one or more feed streams.
- FIG. 1 illustrates the diagram of a method according to the state of the art as described in the preamble of the present description.
- FIG. 2 illustrates a diagram of an embodiment of an implementation of a method according to the invention.
- FIG. 3 illustrates a diagram of a particular embodiment of an implementation of a method according to the invention.
- a natural gas feed stream 1 is introduced into a main heat exchanger 2 to be cooled.
- the gas thus cooled 3 is partially condensed and introduced into a pot phase separator 4.
- the gas phase 5 at the top of the phase separator pot 4 is introduced into a turbine 6 in order to recover the relaxation energy and to condense a part of the stream 5, then is introduced into an absorption column 7 comprising a lower part 7 'and an upper part 7 ".
- the liquid phase 8 in the tank of phase separator pot 4 is introduced after expansion 9 in the absorption column 7
- the absorption column produces a liquid in the bottom of the column and at the top of the column, a waste gas 11.
- the liquid 10 is heated in a heat exchanger 12 in which it is partially vaporised. introduced in the main exchanger 2, this introduction 13 is then strongly diphasic.
- the residual gas 11 containing only the more volatile products than ethane is heated in the main heat exchanger 2, the resulting stream 14 is then compressed and sent to a processing unit A.
- This column 15 produces in the tank 16, a reboiled liquid product 18 using a reboiler 17 to obtain a propane-rich liquid and depleted in ethane.
- a gas 20 is produced at the top of fractionating column 15, a gas 20 is produced.
- This gas 15 is condensed in the heat exchanger 12 and the product 21 leaving the exchanger 12 is introduced into a phase separator pot 22.
- the gas phase 23 at the top of the phase separator pot 22 serves as reflux to the column 7.
- the liquid in the tank of the phase separator pot 22 serves as reflux 26 at the top of the fractionation column 15.
- a pump 30 is necessary to pump the liquid 25.
- the waste gas 1 1 at the top of the absorption column 7 which contains only the more volatile products than ethane is heated in a heat exchanger 27 situated just downstream of the head of said column 7. Then, the gas thus heated 28 at the outlet of the heat exchanger 27 is introduced into the heat exchanger 12 at the top of the fractionation column before being introduced into the main heat exchanger 2 to form the stream 14 which is then compressed and sent to the a processing unit A.
- the liquid stream 10 in the tank of the absorption column 7 is pumped by means of a pump 29 and then directly introduced into the main exchanger 2 to form the stream 13 'which is sent to the fractionation column 15.
- the heat exchanger 12 can be mounted inside the fractionation column 15.
- the heat exchanger 27 can be mounted directly to the Above the absorption column 7. The advantage over installing it on the ground is to avoid a reflux pump.
- FIG. 3 another embodiment is schematized.
- the modification consists in a separation of the fluid 1 1 at the top of the absorption column 7 in several currents 1 1 'and 1 1 ".
- the current 1 1' ensures the condensation in the condenser 12 at the top of the fractionation column 15.
- the stream 1 1 ' is introduced into the condenser 12 at the top of the fractionation column 15 and is introduced into the main exchanger 2.
- the stream 1 1 "is directly introduced into the main exchanger 2.
- the tank liquid of the absorption column 7 is pumped and then directly introduced into the main exchanger 2.
- a control valve can precisely control the fraction sent to the top of the fractionation column 15, allowing precise and effective control of the unit.
- the heat exchanger 12 can be mounted directly above the absorption column 7.
- the interest compared to the installation on the ground, is avoid a reflux pump.
- the invention can advantageously be combined with an integration between the columns and the exchangers.
- a configuration for integrating in the same module the column 15 and the exchanger 12, avoiding the use of the pump 25 for example and avoiding a ferrule dedicated to the exchanger 12 is proposed.
- said module is characterized in that, directly above the fractionation column 15 is installed a separator pot, above which is installed a condenser.
- the condenser is connected to the head of the fractionation column and to the separating pot on the condensing side.
- the bowl of the separator pot is connected to the fractionation column (indirectly with a valve between the two typically).
- module is therefore meant a single structure comprising the column 15, the separator pot and the heat exchanger 12.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2017359434A AU2017359434A1 (en) | 2016-11-08 | 2017-11-08 | Method for cryogenically separating a natural gas stream |
| US16/348,186 US20190277566A1 (en) | 2016-11-08 | 2017-11-08 | Method for cryogenically separating a natural gas stream |
| RU2019115665A RU2720366C1 (ru) | 2016-11-08 | 2017-11-08 | Способ криогенного разделения потока природного газа |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1660774A FR3058508B1 (fr) | 2016-11-08 | 2016-11-08 | Procede de separation cryogenique d'un courant de gaz naturel |
| FR1660774 | 2016-11-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2018087471A1 true WO2018087471A1 (fr) | 2018-05-17 |
Family
ID=57583364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2017/053045 Ceased WO2018087471A1 (fr) | 2016-11-08 | 2017-11-08 | Procédé de séparation cryogénique d'un courant de gaz naturel |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20190277566A1 (fr) |
| AU (1) | AU2017359434A1 (fr) |
| FR (1) | FR3058508B1 (fr) |
| RU (1) | RU2720366C1 (fr) |
| WO (1) | WO2018087471A1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112760127A (zh) * | 2019-11-01 | 2021-05-07 | 中国石化工程建设有限公司 | 一种油气分离及回收的装置和方法 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA3119011A1 (fr) * | 2021-05-18 | 2022-11-18 | 1304338 Alberta Ltd. | Methode de sechage d'un flux de gaz d'hydrocarbures |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4690702A (en) | 1984-09-28 | 1987-09-01 | Compagnie Francaise D'etudes Et De Construction "Technip" | Method and apparatus for cryogenic fractionation of a gaseous feed |
| US5114450A (en) | 1989-04-25 | 1992-05-19 | Compagnie Francaise D'etudes Et De Construction-Technip | Method of recovering liquid hydrocarbons in a gaseous charge and plant for carrying out the method |
| US20020157538A1 (en) * | 2001-03-01 | 2002-10-31 | Foglietta Jorge H. | Cryogenic process utilizing high pressure absorber column |
| DE10221229A1 (de) * | 2002-05-13 | 2003-12-04 | Linde Ag | Verfahren zur Abtrennung von C3+-Kohlenwasserstoffen aus einem Kohlenwasserstoffreichen Strom |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4869740A (en) * | 1988-05-17 | 1989-09-26 | Elcor Corporation | Hydrocarbon gas processing |
| US4889545A (en) * | 1988-11-21 | 1989-12-26 | Elcor Corporation | Hydrocarbon gas processing |
-
2016
- 2016-11-08 FR FR1660774A patent/FR3058508B1/fr active Active
-
2017
- 2017-11-08 US US16/348,186 patent/US20190277566A1/en not_active Abandoned
- 2017-11-08 RU RU2019115665A patent/RU2720366C1/ru active
- 2017-11-08 WO PCT/FR2017/053045 patent/WO2018087471A1/fr not_active Ceased
- 2017-11-08 AU AU2017359434A patent/AU2017359434A1/en not_active Abandoned
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4690702A (en) | 1984-09-28 | 1987-09-01 | Compagnie Francaise D'etudes Et De Construction "Technip" | Method and apparatus for cryogenic fractionation of a gaseous feed |
| US5114450A (en) | 1989-04-25 | 1992-05-19 | Compagnie Francaise D'etudes Et De Construction-Technip | Method of recovering liquid hydrocarbons in a gaseous charge and plant for carrying out the method |
| US20020157538A1 (en) * | 2001-03-01 | 2002-10-31 | Foglietta Jorge H. | Cryogenic process utilizing high pressure absorber column |
| DE10221229A1 (de) * | 2002-05-13 | 2003-12-04 | Linde Ag | Verfahren zur Abtrennung von C3+-Kohlenwasserstoffen aus einem Kohlenwasserstoffreichen Strom |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112760127A (zh) * | 2019-11-01 | 2021-05-07 | 中国石化工程建设有限公司 | 一种油气分离及回收的装置和方法 |
| CN112760127B (zh) * | 2019-11-01 | 2022-04-12 | 中国石化工程建设有限公司 | 一种油气分离及回收的装置和方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20190277566A1 (en) | 2019-09-12 |
| FR3058508A1 (fr) | 2018-05-11 |
| FR3058508B1 (fr) | 2020-01-10 |
| AU2017359434A1 (en) | 2019-06-13 |
| RU2720366C1 (ru) | 2020-04-29 |
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