EP0780649B1 - Verfahren und Anlage zur Entfernung von Stickstoff aus Erdgas - Google Patents

Verfahren und Anlage zur Entfernung von Stickstoff aus Erdgas Download PDF

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Publication number
EP0780649B1
EP0780649B1 EP96203555A EP96203555A EP0780649B1 EP 0780649 B1 EP0780649 B1 EP 0780649B1 EP 96203555 A EP96203555 A EP 96203555A EP 96203555 A EP96203555 A EP 96203555A EP 0780649 B1 EP0780649 B1 EP 0780649B1
Authority
EP
European Patent Office
Prior art keywords
nitrogen
natural gas
heat exchanger
pipe
installation
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.)
Expired - Lifetime
Application number
EP96203555A
Other languages
English (en)
French (fr)
Other versions
EP0780649A1 (de
Inventor
Karel Dirk Scheffer
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.)
Nv Hoek Loos
Original Assignee
WA Hoeks Machine en Zuurstoffabriek NV
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 WA Hoeks Machine en Zuurstoffabriek NV filed Critical WA Hoeks Machine en Zuurstoffabriek NV
Publication of EP0780649A1 publication Critical patent/EP0780649A1/de
Application granted granted Critical
Publication of EP0780649B1 publication Critical patent/EP0780649B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F25J3/06—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
    • F25J3/066—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 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
    • 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
    • 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
    • F25J3/063—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
    • F25J3/0635—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/02—Processes or apparatus using other separation and/or other processing means using simple phase separation in a vessel or drum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/50—Oxygen
    • 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 present invention relates to a method and installation for the removal of nitrogen from natural gas by means of cryocondensation.
  • Nitrogen is not wanted in natural gas because nitrogen does not contribute to a higher flame temperature, on the contrary, nitrogen is ballast; therefore nitrogen needs to be removed from natural gas.
  • nitrogen is known to bind to oxygen, forming toxic NO x compounds.
  • the object of the invention is the removal of nitrogen from natural gas and the use of pure oxygen, resulting in increased efficiency.
  • the nitrogen present in the natural gas has to be removed before the natural gas enters the combustion process.
  • the present invention provides a method according to claim 1 and an installation according to claim 4.
  • cryocondensation of hydrocarbons is carried out using cold nitrogen as cooling means.
  • the method according to the invention is particularly suitable for the removal of nitrogen from natural gas having a nitrogen content of about 14% by volume.
  • the general idea of the invention is that the liquid oxygen is boiled off in a cryocondensation unit, causing the hydrocarbons to condense. After heating, the condensed hydrocarbons, together with the gaseous oxygen that has developed, can be used in the combustion process.
  • the natural gas to be treated is preferably precooled in a heat exchanger to about -80°C before cooling with liquid oxygen to about -165°C.
  • the method according to the invention provides the following advantages:
  • the present invention relates to an installation for the removal of nitrogen from natural gas, characterized in that the installation is provided with a storage tank for liquid oxygen, which tank is connected by means of a pipe with a first heat exchanger for the condensation of the natural gas which, via a pipe and the first heat exchanger is linked to a second heat exchanger, from which the nitrogen-free condensed natural gas via a pipe, after being heated in the second heat exchanger, arrives via a pipe in a burner, while liquid oxygen from the first heat exchanger enters via a pipe a third heat exchanger to be fed in the gaseous phase via a pipe to the burner and gaseous nitrogen is removed from the first heat exchanger via a pipe.
  • the installation according to the invention is indicated by reference number (1).
  • the installation (1) according to the invention is provided with a storage tank (2) for liquid oxygen.
  • the installation is further provided with first, second and third heat exchangers (3,4, and 11).
  • Natural gas for instance from Groningen, having a nitrogen content of 14% by volume is fed via a pipe (7) to the first heat exchanger (4) in which the natural gas is cooled to - 80°C.
  • the thus cooled natural gas is led to the second heat exchanger (3) in order to be further cooled with the aid of liquid oxygen to -160°C to -165°C, which liquid oxygen is led from the storage tank (2) into the third heat exchanger via pipe (5) and tap (14).
  • the hydrocarbons condensed in the second heat exchanger (3) are fed into the first heat exchanger (4), where the liquid hydrocarbons become gaseous and in that form are transported via a pipe (13) to a burner (12) of a melting furnace.
  • oxygen coming from the second heat exchanger (3) in liquid form is led via a pipe (9) and a tap (16) to the the third heat exchanger (11) and then to the burner (12).
  • the third heat exchanger (11) cold gaseous oxygen is further heated to ambient temperature.
  • the gaseous oxygen is united with the hydrocarbons in the burner (12) of the melting furnace.

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)
  • Treating Waste Gases (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Gas Separation By Absorption (AREA)

Claims (4)

  1. Verfahren zur Entfernung von Stickstoff aus Erdgas durch Kryokondensation, dadurch gekennzeichnet, dass als Kühlmittel flüssiger Sauerstoff verwendet und der flüssige Sauerstoff einem Wärmeaustauscher zugeführt wird, wo das stickstoffreiche Erdgas kondensiert und der übrig bleibende gasförmige Stickstoff abgelassen wird, wobei nach Erwärmen die stickstofffreien kondensierten Kohlenwasserstoffe sowie der verdampfte gasförmige Sauerstoff einem Brenner zugeleitet werden.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Stickstoffgehalt des Erdgases etwa 14 Vol.-% beträgt.
  3. Verfahren nach den Ansprüchen 1 bis 2, dadurch gekennzeichnet, dass das Erdgas, bevor es mit flüssigem Sauerstoff auf etwa -165 °C abgekühlt wird, in einem Wärmeaustauscher auf etwa -80 °C vorgekühlt wird.
  4. Vorrichtung zur Entfernung von Stickstoff aus Erdgas, dadurch gekennzeichnet, dass die Vorrichtung (1) mit einem Lagertank (2) für flüssigen Sauerstoff versehen ist, an welchen über die Rohrleitung (5) ein erster Wärmeaustauscher (3) für die Kondensation des Erdgases angeschlossen ist, das über die Rohrleitung (7) und den ersten Wärmeaustauscher (3) mit einem zweiten Wärmeaustauscher (4) verbunden ist, aus welchem das stickstofffreie kondensierte Erdgas über die Rohrleitung (6), nachdem es in dem zweiten Wärmeaustauscher (4) erwärmt worden ist, über die Rohrleitung (13) den Brenner (12) erreicht, während der flüssige Sauerstoff von dem ersten Wärmeaustauscher (3) über die Rohrleitung (9) in einen dritten Wärmeaustauscher (11) gelangt, um als gasförmige Phase über die Rohrleitung (10) dem Brenner (12) zugeleitet zu werden, wobei der gasförmige Stickstoff über die Rohrleitung (8) aus dem ersten Wärmeaustauscher (3) entfernt wird.
EP96203555A 1995-12-20 1996-12-16 Verfahren und Anlage zur Entfernung von Stickstoff aus Erdgas Expired - Lifetime EP0780649B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1001940A NL1001940C2 (nl) 1995-12-20 1995-12-20 Werkwijze en inrichting voor het verwijderen van stikstof uit aardgas.
NL1001940 1995-12-20

Publications (2)

Publication Number Publication Date
EP0780649A1 EP0780649A1 (de) 1997-06-25
EP0780649B1 true EP0780649B1 (de) 2001-07-04

Family

ID=19762059

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96203555A Expired - Lifetime EP0780649B1 (de) 1995-12-20 1996-12-16 Verfahren und Anlage zur Entfernung von Stickstoff aus Erdgas

Country Status (5)

Country Link
EP (1) EP0780649B1 (de)
AT (1) ATE202840T1 (de)
DE (1) DE69613664T2 (de)
NL (1) NL1001940C2 (de)
PL (1) PL317602A1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2763081C (en) 2011-12-20 2019-08-13 Jose Lourenco Method to produce liquefied natural gas (lng) at midstream natural gas liquids (ngls) recovery plants.
CA2772479C (en) 2012-03-21 2020-01-07 Mackenzie Millar Temperature controlled method to liquefy gas and a production plant using the method.
CA2790961C (en) 2012-05-11 2019-09-03 Jose Lourenco A method to recover lpg and condensates from refineries fuel gas streams.
CA2787746C (en) 2012-08-27 2019-08-13 Mackenzie Millar Method of producing and distributing liquid natural gas
CA2798057C (en) 2012-12-04 2019-11-26 Mackenzie Millar A method to produce lng at gas pressure letdown stations in natural gas transmission pipeline systems
CA2813260C (en) 2013-04-15 2021-07-06 Mackenzie Millar A method to produce lng
CA2958091C (en) 2014-08-15 2021-05-18 1304338 Alberta Ltd. A method of removing carbon dioxide during liquid natural gas production from natural gas at gas pressure letdown stations
US11173445B2 (en) 2015-09-16 2021-11-16 1304338 Alberta Ltd. Method of preparing natural gas at a gas pressure reduction stations to produce liquid natural gas (LNG)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5036671A (en) * 1990-02-06 1991-08-06 Liquid Air Engineering Company Method of liquefying natural gas
US5390499A (en) * 1993-10-27 1995-02-21 Liquid Carbonic Corporation Process to increase natural gas methane content

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
H. Hausen, H. Linde, "Tieftemperaturtechnik", Springer-Verlag, Heidelberg, 1985, pages 7 to 11 *

Also Published As

Publication number Publication date
NL1001940C2 (nl) 1997-06-24
PL317602A1 (en) 1997-06-23
ATE202840T1 (de) 2001-07-15
EP0780649A1 (de) 1997-06-25
DE69613664T2 (de) 2002-05-29
DE69613664D1 (de) 2001-08-09

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