WO2008104308A2 - Verfahren zum abtrennen von stickstoff aus verflüssigtem erdgas - Google Patents
Verfahren zum abtrennen von stickstoff aus verflüssigtem erdgas Download PDFInfo
- Publication number
- WO2008104308A2 WO2008104308A2 PCT/EP2008/001290 EP2008001290W WO2008104308A2 WO 2008104308 A2 WO2008104308 A2 WO 2008104308A2 EP 2008001290 W EP2008001290 W EP 2008001290W WO 2008104308 A2 WO2008104308 A2 WO 2008104308A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rich fraction
- stripping column
- liquefied hydrocarbon
- liquefied
- natural gas
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000003949 liquefied natural gas Substances 0.000 title claims abstract description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims description 39
- 229910052757 nitrogen Inorganic materials 0.000 title claims description 20
- 238000000926 separation method Methods 0.000 title description 2
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 38
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 38
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 38
- 238000010992 reflux Methods 0.000 claims abstract description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 28
- 239000007789 gas Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 5
- 238000004781 supercooling Methods 0.000 claims description 4
- 239000003345 natural gas Substances 0.000 description 10
- 239000012071 phase Substances 0.000 description 6
- 239000003507 refrigerant Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 150000002829 nitrogen Chemical class 0.000 description 1
- 238000010943 off-gassing Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/0204—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the feed stream
- F25J3/0209—Natural gas or substitute natural gas
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic 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
- F25J1/0002—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"
- F25J1/0042—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 liquid 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
- F25J1/02—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
- F25J1/0258—Construction and layout of liquefaction equipments, e.g. valves, machines vertical layout of the equipments within in the cold box
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
- F25J3/0233—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream separation of CnHm with 1 carbon atom or more
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/0228—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the separated product stream
- F25J3/0257—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 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
- 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
-
- 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
- F25J2200/40—Features relating to the provision of boil-up in the bottom of a column
-
- 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
-
- 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
- F25J2205/30—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes
-
- 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
- F25J2210/90—Boil-off gas from storage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2215/00—Processes characterised by the type or other details of the product stream
- F25J2215/04—Recovery of liquid products
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
- F25J2230/08—Cold compressor, i.e. suction of the gas at cryogenic temperature and generally without afterstage-cooler
-
- 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
- F25J2230/42—Processes or apparatus involving steps for increasing the pressure of gaseous process streams the fluid being 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
- F25J2240/00—Processes or apparatus involving steps for expanding of process streams
- F25J2240/30—Dynamic liquid or hydraulic expansion with extraction of work, e.g. single phase or two-phase turbine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2245/00—Processes or apparatus involving steps for recycling of process streams
- F25J2245/42—Processes or apparatus involving steps for recycling of process streams the recycled stream being 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
- F25J2245/00—Processes or apparatus involving steps for recycling of process streams
- F25J2245/90—Processes or apparatus involving steps for recycling of process streams the recycled stream being boil-off gas from storage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2270/00—Refrigeration techniques used
- F25J2270/12—External refrigeration with liquid vaporising loop
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2280/00—Control of the process or apparatus
- F25J2280/02—Control in general, load changes, different modes ("runs"), measurements
-
- 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
- F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
- F25J2290/40—Vertical layout or arrangement of cold equipments within in the cold box, e.g. columns, condensers, heat exchangers etc.
-
- 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
- F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
- F25J2290/62—Details of storing a fluid in a tank
Definitions
- the invention relates to a method for separating an N 2 -rich fraction from a liquefied hydrocarbon-rich fraction, in particular from liquefied natural gas, wherein the liquefied hydrocarbon-rich fraction after their
- LNG liquefied natural gas
- the liquefied natural gas (LNG) obtained by means of the state-of-the-art liquefaction process may typically only have a nitrogen content of at most 1% by volume. If the nitrogen content is above this limit, it is usually necessary to separate off the amount of nitrogen that is prohibited in the liquefied natural gas.
- This nitrogen separation is usually carried out by depressurizing the liquefied natural gas under pressure, with a targeted outgassing of the liquefied natural gas is achieved by a suitable in terms of the temperature and pressure of the liquefied natural gas choice of the initial state before the relaxation and the pressure after relaxation , About the resulting gas phase in the liquid phase - this is the desired LNG product - unwanted nitrogen is removed.
- Boiling equilibrium undesirably high with the nitrogen to be removed ausgasende methane amount undesirably high with the nitrogen to be removed ausgasende methane amount.
- generic methods are used for separating nitrogen from liquefied natural gas, in which by providing a stripping column nitrogen can be depleted more selective and at the same time the undesirable losses of methane can be reduced in the depleted nitrogen-rich fraction.
- Such a generic method for separating a nitrogen-rich fraction from a liquefied Hydrocarbon-rich fraction can be found for example in US Pat. No. 5,893,274.
- the liquefied hydrocarbon-rich fraction is given after its expansion two-phase on the head of the stripping column.
- the bottom of the stripping column is heated with the liquefied hydrocarbon-rich fraction before its expansion in the indirect heat exchange via a reboiler or reboiler.
- the liquid fraction obtained in the bottom of the stripping column represents the desired LNG product, while the nitrogen-rich gas fraction withdrawn at the top of the stripping column is generally used only as fuel gas.
- a disadvantage of this procedure is that a heat exchanger or reboiler, which serves to heat the bottom of the stripping column, is needed. This is especially at transient conditions, such as start of the strip process or system failure exposed to high thermal loads. If this component fails, this usually results in a complete plant shutdown that can last for an unacceptable long period of time - up to a few weeks.
- Object of the present invention is to provide a generic method for separating a N 2 -rich fraction from a liquefied hydrocarbon-rich fraction, which avoids the aforementioned disadvantages.
- a generic method for separating a N 2 -rich fraction from a liquefied hydrocarbon-rich fraction is proposed, which is characterized in that a first partial stream of the liquefied hydrocarbon-rich fraction of the stripping column is fed as reflux, while a second Partial flow of the liquefied hydrocarbon-rich fraction is fed to the bottom of the stripping column, wherein the second
- Partial flow of the liquefied hydrocarbon-rich fraction at condensing pressure has a higher temperature than the first partial stream of the liquefied hydrocarbon-rich fraction.
- a partial stream of the liquefied hydrocarbon-rich fraction itself now serves as bottom heating for the stripping column. This makes the provision of an additional heat exchanger or reboiler, as required in the prior art, superfluous. All disadvantages associated with this component are therefore eliminated in the inventive method.
- a disadvantage of the method according to the invention is that the energy consumption of the chosen liquefaction process increases slightly.
- the first and / or the second partial stream of the liquefied hydrocarbon-rich fraction is subjected to a relaxation, preferably a relaxation in a liquid expander, before being fed into the stripping column,
- the stripping column as the reflux charged first partial stream of the liquefied hydrocarbon-rich fraction has a gas content of at most 80 vol .-%, typically a vapor content after the expansion of 20 vol .-%, preferably 10 vol .-%,
- At least one further methane- or nitrogen-rich stream is fed to the bottom of the stripping column.
- This liquefaction process is shown in the figure only in schematic form, in the form of two heat exchanger areas E1 and E2 and a black box R, which stands for the components of one or more refrigerant and / or mixed refrigerant cycles.
- the procedure according to the invention can in principle be combined with all known liquefaction processes.
- the liquefied and optionally slightly supercooled natural gas stream is withdrawn via line V from the heat exchanger E1 and divided into two partial streams 2 and 3.
- the first partial flow is supercooled in the heat exchanger E2 against the refrigerant (mixture) stream 5 passed through the heat exchanger E2 via line 5, cooled in the liquid expander X1 and then fed as reflux via line 2 'of the stripping column S to the top.
- the stripping column S is usually operated in a pressure range between 1, 0 and 2.0 bar, preferably between 1.0 and 1.3 bar.
- the second partial flow of the liquefied and possibly slightly supercooled natural gas is fed via line 3 to a liquid expander X2, depressurized in this cold and subsequently passed via line 3 'into the bottom of the stripping column S.
- the aforementioned expander X2 may optionally be designed as a so-called two-phase expander, in which the fluid is present at the outlet two-phase.
- the aforementioned expander X1 and X2 can be optionally provided. If they are or one of these expanders is not provided, expansion valves a and b, by means of which the partial streams fed to stripping column S are relieved to the pressure of stripping column S, are normally used in lines 2 and 3. A waiver of these expansion valves a and b - with a simultaneous renouncement of the aforementioned expander X1 and X2 - would be conceivable if the supplied via the lines 2 and 3 of the stripping column S partial flows were already below the pressure prevailing in the stripping column S pressure.
- the temperature difference between the first and the second partial stream of the stripping column S natural gas stream is before their relaxation between 40 and 100 0 C, preferably between 60 and 80 0 C.
- the parameters pressure and temperature of the stripping column S in the bottom of which supplied second natural gas Partial flow should be chosen so that this partial stream is present in two phases after relaxation to the pressure of the stripping column S. As a result, the gas phase can be used as stripping vapor for the stripping column S.
- the desired nitrogen stripping can be achieved from the resulting in the bottom of the stripping column S LNG product become.
- the methane content of the overhead product of the stripping column S can be regulated or adjusted as before.
- the LNG product is withdrawn from the bottom of the stripping column S via line 6 and supplied, for example, to an LNG store T.
- it can be supplied by means of the pump P via line 7 to an LNG carrier C.
- the nitrogen-rich fraction withdrawn at the top of the stripping column S via line 9 is usually compressed in one or more stages to the desired discharge pressure and fed via line 10 to its further use, for example as fuel gas.
- the compression V is preferably realized by means of a cold aspirating compressor.
- a cold aspirating compressor makes it possible to put the pressure in the stripping column S close to the atmospheric pressure, without causing a so-called.
- Oxygen Burglary into the withdrawn via line 9 nitrogen-rich fraction must be risked, which in a warming over Line 9 withdrawn nitrogen-rich fraction due to a pressure loss would be feared.
- the compressor V used for the compression has adjustable inlet blades. These allow a high load range, without the need for a realizable via the line 11 gas recirculation.
- the via line 11 to the bottom of the stripping column S supplied nitrogen-rich fraction represents the so-called. Pump Prevention Fraction.
- the boil-off gas accumulating during the loading of the LNG carrier C can likewise be fed via line 12 to the bottom of the stripping column S and / or returned to the LNG storage T via the lines 12 and 8. Furthermore, the boil-off gas accumulating in the LNG tank T can be fed via the lines 8 and 12 to the bottom of the stripping column S.
- the bottom of the stripping column S supplied fractions - together with the second partial flow of the liquefied natural gas stream - serve the striping process.
- Blower is possible if the stripping column S can be placed sufficiently high above the LNG tank T, so that the pressure in the LNG tank T may indeed be higher than in the bottom of the stripping column S, but the provision of a pump in the conduit 6 is not required.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MX2009009043A MX2009009043A (es) | 2007-03-01 | 2008-02-19 | Metodo para separacion de nitrogeno del gas natural licuado. |
AU2008221073A AU2008221073B2 (en) | 2007-03-01 | 2008-02-19 | Method for the separation of nitrogen from liquefied natural gas |
US12/528,884 US20100275646A1 (en) | 2007-03-01 | 2008-02-19 | Method of Separating Off Nitrogen from Liquefied Natural Gas |
NO20093081A NO20093081L (no) | 2007-03-01 | 2009-09-30 | Fremgangsmate for a skille nitrogen fra vaeskedannet naturgass |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007010032A DE102007010032A1 (de) | 2007-03-01 | 2007-03-01 | Verfahren zum Abtrennen von Stickstoff aus verflüssigtem Erdgas |
DE102007010032.0 | 2007-03-01 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2008104308A2 true WO2008104308A2 (de) | 2008-09-04 |
WO2008104308A3 WO2008104308A3 (de) | 2014-02-27 |
Family
ID=39670024
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2008/001290 WO2008104308A2 (de) | 2007-03-01 | 2008-02-19 | Verfahren zum abtrennen von stickstoff aus verflüssigtem erdgas |
Country Status (10)
Country | Link |
---|---|
US (1) | US20100275646A1 (de) |
AR (1) | AR065475A1 (de) |
AU (1) | AU2008221073B2 (de) |
CL (1) | CL2008000631A1 (de) |
DE (1) | DE102007010032A1 (de) |
MX (1) | MX2009009043A (de) |
NO (1) | NO20093081L (de) |
PE (1) | PE20081423A1 (de) |
RU (1) | RU2462672C2 (de) |
WO (1) | WO2008104308A2 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2537486C2 (ru) * | 2009-08-21 | 2015-01-10 | Линде Акциенгезелльшафт | Способ сжижения обогащенной углеводородами, содержащей азот сырьевой фракции, предпочтительно природного газа |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007047765A1 (de) | 2007-10-05 | 2009-04-09 | Linde Aktiengesellschaft | Verfahren zum Verflüssigen einer Kohlenwasserstoff-reichen Fraktion |
BR112012001046B1 (pt) * | 2009-07-21 | 2021-02-23 | Shell Internationale Research Maatschappij B.V | Método e aparelho para tratar uma corrente de hidrocarbonetomultifásica |
DE102010044646A1 (de) * | 2010-09-07 | 2012-03-08 | Linde Aktiengesellschaft | Verfahren zum Abtrennen von Stickstoff und Wasserstoff aus Erdgas |
FR2971332B1 (fr) | 2011-02-09 | 2017-06-16 | Air Liquide | Procede et appareil de separation cryogenique d'un debit riche en methane |
MY185531A (en) * | 2011-12-12 | 2021-05-19 | Shell Int Research | Method and apparatus for removing nitrogen from a cryogenic hydrocarbon composition |
KR20140103144A (ko) * | 2011-12-12 | 2014-08-25 | 쉘 인터내셔날 리써취 마트샤피지 비.브이. | 극저온 탄화수소 조성물로부터 질소를 제거하기 위한 방법 및 장치 |
MY178855A (en) * | 2011-12-12 | 2020-10-21 | Shell Int Research | Method and apparatus for removing nitrogen from a cryogenic hydrocarbon composition |
US9543787B2 (en) | 2011-12-30 | 2017-01-10 | Scrutiny, Inc. | FRAME (forced recuperation, aggregation and movement of exergy) |
MY192719A (en) * | 2015-03-25 | 2022-09-05 | Petroliam Nasional Berhad Petronas | An integrated system and process for gas recovery in the lng plant |
DE102015004120A1 (de) * | 2015-03-31 | 2016-10-06 | Linde Aktiengesellschaft | Verfahren zum Abtrennen von Stickstoff aus einer Kohlenwasserstoff-reichen Fraktion |
US11014039B2 (en) * | 2018-07-06 | 2021-05-25 | Praxair Technology, Inc. | Nitrogen service supply system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5651269A (en) * | 1993-12-30 | 1997-07-29 | Institut Francais Du Petrole | Method and apparatus for liquefaction of a natural gas |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3559417A (en) * | 1967-10-12 | 1971-02-02 | Mc Donnell Douglas Corp | Separation of low boiling hydrocarbons and nitrogen by fractionation with product stream heat exchange |
US3600282A (en) * | 1968-11-19 | 1971-08-17 | Phillips Petroleum Co | Control of two reflux streams in a fractional separation system |
DE1939114B2 (de) * | 1969-08-01 | 1979-01-25 | Linde Ag, 6200 Wiesbaden | Verflüssigungsverfahren für Gase und Gasgemische, insbesondere für Erdgas |
US4445916A (en) * | 1982-08-30 | 1984-05-01 | Newton Charles L | Process for liquefying methane |
US4746342A (en) * | 1985-11-27 | 1988-05-24 | Phillips Petroleum Company | Recovery of NGL's and rejection of N2 from natural gas |
US4878932A (en) * | 1989-03-21 | 1989-11-07 | Union Carbide Corporation | Cryogenic rectification process for separating nitrogen and methane |
FR2682964B1 (fr) * | 1991-10-23 | 1994-08-05 | Elf Aquitaine | Procede de deazotation d'un melange liquefie d'hydrocarbures consistant principalement en methane. |
MY117899A (en) | 1995-06-23 | 2004-08-30 | Shell Int Research | Method of liquefying and treating a natural gas. |
US6978638B2 (en) * | 2003-05-22 | 2005-12-27 | Air Products And Chemicals, Inc. | Nitrogen rejection from condensed natural gas |
EP1771694A1 (de) * | 2004-07-01 | 2007-04-11 | Ortloff Engineers, Ltd | Verarbeitung von flüssigerdgas |
-
2007
- 2007-03-01 DE DE102007010032A patent/DE102007010032A1/de not_active Withdrawn
-
2008
- 2008-02-19 WO PCT/EP2008/001290 patent/WO2008104308A2/de active Application Filing
- 2008-02-19 RU RU2009136341/06A patent/RU2462672C2/ru active
- 2008-02-19 AU AU2008221073A patent/AU2008221073B2/en active Active
- 2008-02-19 MX MX2009009043A patent/MX2009009043A/es active IP Right Grant
- 2008-02-19 US US12/528,884 patent/US20100275646A1/en not_active Abandoned
- 2008-02-20 PE PE2008000353A patent/PE20081423A1/es not_active Application Discontinuation
- 2008-02-25 AR ARP080100782A patent/AR065475A1/es unknown
- 2008-02-29 CL CL2008000631A patent/CL2008000631A1/es unknown
-
2009
- 2009-09-30 NO NO20093081A patent/NO20093081L/no not_active Application Discontinuation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5651269A (en) * | 1993-12-30 | 1997-07-29 | Institut Francais Du Petrole | Method and apparatus for liquefaction of a natural gas |
Non-Patent Citations (1)
Title |
---|
JACKS J-P G ET AL: "Economic removal of nitrogen from LNG", HYDROCARBON PROCESSING, GULF PUBLISHING CO. HOUSTON, US, 1. Dezember 1977 (1977-12-01), Seiten 133-136, XP009095804, ISSN: 0018-8190 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2537486C2 (ru) * | 2009-08-21 | 2015-01-10 | Линде Акциенгезелльшафт | Способ сжижения обогащенной углеводородами, содержащей азот сырьевой фракции, предпочтительно природного газа |
Also Published As
Publication number | Publication date |
---|---|
AU2008221073B2 (en) | 2012-08-23 |
AU2008221073A1 (en) | 2008-09-04 |
DE102007010032A1 (de) | 2008-09-04 |
PE20081423A1 (es) | 2008-11-25 |
WO2008104308A3 (de) | 2014-02-27 |
MX2009009043A (es) | 2009-09-29 |
NO20093081L (no) | 2009-09-30 |
US20100275646A1 (en) | 2010-11-04 |
RU2462672C2 (ru) | 2012-09-27 |
AR065475A1 (es) | 2009-06-10 |
CL2008000631A1 (es) | 2009-09-25 |
RU2009136341A (ru) | 2011-04-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2008104308A2 (de) | Verfahren zum abtrennen von stickstoff aus verflüssigtem erdgas | |
DE102010044646A1 (de) | Verfahren zum Abtrennen von Stickstoff und Wasserstoff aus Erdgas | |
DE102009008229A1 (de) | Verfahren zum Abtrennen von Stickstoff | |
DE102010011052A1 (de) | Verfahren zum Verflüssigen einer Kohlenwasserstoff-reichen Fraktion | |
DE102011109234A1 (de) | Verflüssigen eines Methan-reichen Gases | |
DE19938216A1 (de) | Verflüssigungsverfahren | |
DE102015001858A1 (de) | Kombinierte Abtrennung von Schwer- und Leichtsiedern aus Erdgas | |
EP2484999A2 (de) | Verfahren zum Abkühlen eines ein-oder mehrkomponentigen Stromes | |
DE102008007925A1 (de) | Verfahren zur Helium-Gewinnung | |
DE102009008230A1 (de) | Verfahren zum Verflüssigen eines Kohlenwasserstoff-reichen Stromes | |
DE102009015766A1 (de) | Verfahren zum Verflüssigen einer Kohlenwasserstoff-reichen Fraktion | |
DE102011104725A1 (de) | Verfahren zum Verflüssigen einer Kohlenwasserstoffreichen Fraktion | |
DE19612173C1 (de) | Verfahren zum Verflüssigen eines kohlenwasserstoffreichen Einsatzstromes | |
WO2010112206A2 (de) | Verfahren zum verflüssigen einer kohlenwasserstoff-reichen fraktion | |
DE102012017654A1 (de) | Verfahren und Vorrichtung zur Stickstoffverflüssigung | |
DE102012020469A1 (de) | Verfahren und Vorrichtung zur Abtrennung von Methan aus einem Synthesegas | |
DE69908478T2 (de) | Trennung von Kohlenmonoxid in Kohlenmonoxid und Wasserstoff enthaltenden Gasgemischen | |
DE102006021620B4 (de) | Vorbehandlung eines zu verflüssigenden Erdgasstromes | |
WO2006094676A1 (de) | Helium-gewinnung bei lng-anlagen | |
DE3113093A1 (de) | "kuehlverfahren zur rueckgewinnung oder fraktionierung eines hauptsaechlich aus butan und propan bestehenden, in erdgas enthaltenden gemisches" | |
EP1913319A2 (de) | Verfahren und anlage zum verflüssigen eines kohlenwasserstoffreichen stroms | |
DE102009009477A1 (de) | Verfahren zum Abtrennen von Stickstoff | |
DE102016000393A1 (de) | Verfahren zum Verflüssigen einer Kohlenwasserstoff-reichen Fraktion | |
WO2016155863A1 (de) | Verfahren zum abtrennen von stickstoff aus einer kohlenwasserstoff-reichen fraktion | |
DE19821242A1 (de) | Verfahren und Vorrichtung zum Verflüssigen eines Kohlenwasserstoff-reichen Stromes |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: MX/A/2009/009043 Country of ref document: MX |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2008221073 Country of ref document: AU |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2009136341 Country of ref document: RU |
|
ENP | Entry into the national phase |
Ref document number: 2008221073 Country of ref document: AU Date of ref document: 20080219 Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 12528884 Country of ref document: US |