DE2036344A1 - Liquefying natural gas - with total energy system using adiabatic expansion for cooling - Google Patents

Liquefying natural gas - with total energy system using adiabatic expansion for cooling

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Publication number
DE2036344A1
DE2036344A1 DE19702036344 DE2036344A DE2036344A1 DE 2036344 A1 DE2036344 A1 DE 2036344A1 DE 19702036344 DE19702036344 DE 19702036344 DE 2036344 A DE2036344 A DE 2036344A DE 2036344 A1 DE2036344 A1 DE 2036344A1
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Prior art keywords
gas
line
heat exchanger
consumer
heat
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DE19702036344
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German (de)
Inventor
Ulrich 6680 Neunkirchen Bauer Herbert 6901 Mauer Wendelkirchen Voltmer
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Waga Warme Gastechnik GmbH, 6680 Neunkirchen
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Priority to DE19702036344 priority Critical patent/DE2036344A1/en
Publication of DE2036344A1 publication Critical patent/DE2036344A1/en
Pending 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
    • 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
    • F25J1/0037—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by gas expansion with extraction of work of a return stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
    • F25J1/0032—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
    • F25J1/004—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by flash gas recovery
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/003—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"
    • F25J1/0045—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 vaporising a liquid 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
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0201—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using only internal refrigeration means, i.e. without external refrigeration
    • 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
    • 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
    • F25J2230/30—Compression of the feed 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
    • 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

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)

Abstract

A method for liquefying natural gas or similar supplied to the consumer from the main, consists of using the heat drop occurring from adiabatic expansion of the base load supply to the consumer for cooling the gas liquefaction process; three parallel lines lead from the main to the consumer; the middle line passes through a number of heat exchangers in series and an expansion machine, while the third line passes through some of the heat exchangers in contraflow, then through a Thomson-Joule valve to liquefy the gas, a storage vessel to a draw-off point; the first line, used for peak supply, passes at its outlet to the consumer to a regulator, and before this through a heat exchanger which is connected in parallel to the first heat exchanger of the second line through a boiler for heating the gas, this boiler being supplied from the storage vessel.

Description

Verfahren zum Verflüssigen von Erdgas od.dgl.Process for liquefying natural gas or the like.

Die Erfindung betrifft ein Verfahren zum Verflüssigen von Erdgas od.dgl., das dem Verbraucher über eine Ferngasleitung zugeführt wird.The invention relates to a method for liquefying natural gas or the like., which is supplied to the consumer via a gas pipeline.

Das Verflüssigen von Luft mit Hilfe einer kontinuierlich arbeitenden Anlage ist durch die grundlegenden Arbeiten von Lindes seit langem bekannt. Die von Linde praktizierte Verfahrensweise beruht dabei auf der Erkenntnis, die an sich nur geringe Abkühlung, die Thomson und Joule beim Drosseln der Luft von einem höheren auf einen niedrigeren Druck beobachtet hatten, durch Gegenstromwirkung zu ergänzen.The liquefaction of air with the help of a continuously operating The plant has long been known for the fundamental work done by Lindes. the The procedure practiced by Linde is based on the knowledge that in itself only slight cooling, the Thomson and Joule when choking the air from a higher one to a lower one Had observed pressure by countercurrent action to complete.

Durch Claude ist es ebenfalls seit langem bekannt, wie eich auch die Entspannung der Luft unter äußerer Arbeitsleistung in einer Expansionsmaschine zum Verflüssigen von Luft ausnutzen läßt.It has also been known for a long time through Claude, as well as the Relaxation of the air under external work performance in an expansion machine for Can take advantage of the liquefaction of air.

Unter den Abarten des Claude'schen Verfahrens ist vor allem auch das von Heylandt entwickelte bekannte Verfahren zu nennen, bei dem die Luft statt mit 40 ata und ca. - 1000 C mit 150 ... 200 ata und mit Umgebungstemperatur in die Expansionsmaschine eintritt.This is above all one of the varieties of Claude's method Well-known process developed by Heylandt should be mentioned in which the air takes place with 40 ata and approx. - 1000 C with 150 ... 200 ata and with ambient temperature in the expansion machine entry.

Die vorstehend genannten Grundverfahren lassen sich selbstverständlich auch auf da Verflüssigen von Erdgas bzw.The basic methods mentioned above can of course be used also on the liquefaction of natural gas or

Methan anwenden.Apply methane.

Unter Berücksichtigung der Lehren dieser Grundverfahren läßt sich ableiten, daß der Energieverbrauch in Anlagen zum Verflüssigen von tiefsiedenden Gasen erheblichen Einfluß auf deren Wirtschaftlichkeit hat. Daraus wiederum ergibt sich, daß großer Wert auf die Anwendung energiesparender Verfahren gelegt wird.Taking into account the teachings of these basic procedures, one can deduce that the energy consumption in plants for liquefying low-boiling Gases has a significant influence on their profitability. This in turn results that great value is placed on the use of energy-saving processes.

Da der Energiebedarf bei den schon weiter vorn erwähnten Linde- und Claude-Verfahren erheblich über dem Mindest-Energiebedarf liegt, erfuhren diese bekannten Verfahrensweisen in der Folge verschiedene Verbesserungen bzw. Modifikationen. Dies wiederum führte zu Verfahren, die unter Beseichnungen wie " "Linde-Hochdruckverfahren mit Zwischenentspannung", "Linde-Hochdruckverfahren mit Vorkühlung", "Hochdruckverfahren mit Vorkühlung und Expansionsturbine", "Klassisches Kaskadenverfahren", "Geschlossener Kaskadenkreislauf mit Kältemittelgemisch (OFC)" nach A.P. Kleemenko, "Offener Kaskadenkreislauf mit Kältemittelgemisch", "Expanderverfahren", "Stirling-Prozeß" u.a.m. bekannt wurden.Since the energy requirements of the Linde and Claude process is significantly above the minimum energy requirement, they found out known procedures as a result of various improvements or modifications. This in turn led to processes under designations such as "" Linde letterpress process with intermediate relaxation "," Linde high pressure process with pre-cooling "," High pressure process with pre-cooling and expansion turbine "," Classic cascade process "," Closed Cascade cycle with refrigerant mixture (OFC) "according to A.P. Kleemenko," Open cascade cycle with refrigerant mixture "," expander process "," Stirling process "and others became known.

Die vorliegende Erfindung hat sich die Aufgabe gestellt, die insoweit bekannten Verfahren unter dem Gesichtspunkt der Wirtschaftlichkeit und Einfachheit noch weiter zu verbessern. Die angestrebte Verbesserung beziegt sich dabei im wesentlichen darauf, den Verflüssigungsprozeß im Sinne einer sog. "Totalenergie"-Anlage weitgehend unabhängig von Fremdenergie zu bewerkstelligen.The present invention has set itself the task of that insofar known processes from the point of view of economy and simplicity to improve even further. The improvement sought is essentially related on the liquefaction process in the sense of a so-called "total energy" system to a large extent to be accomplished independently of external energy.

Gelöst wird diese Aufgabe nach dem Willen der Erfindung im wesentlichen dadurch, daß das durch adiabatische Entspannung der verbraucherseitigen Versorgungsgrundlast entstehende Wärmegefälle zum Kühlen des Gasverflüssigungs-Prozesses dient, wobei von einer Ferngasleitung drei zueinander parallele Stränge abzweigen, deren zweiter (mittlerer) Strang im wesentlichen aus der Serienschaltung mehrerer Wärmetauscher und einer Entspannungsmaschine besteht und deren dritter Strang auf einen Teil dieser Wärmetauscher im Gegenstrom geschaltet ist, und der über ein dem Verflüssigen des Gases dienendes, an sich bekanntes Thomson-Joule-Ventil sowie über einen Vorratsbehälter mit der Entnahmequelle in Verbindung steht, während der erste, im wesentlichen als Notversorgung dienende Strang an der Austrittsseite sodann tiber einen Regler und über einen vorgeschalteten Wärmetauscher der Ferngasleitung zugeführt wird, wobei dieser Wärmetauscher su dem eraten Wärmetauscher des zweiten Stranges parallel geschaltet ist, zwischen welchen ein der Aufwärmung des Gases dienender sessel geschaltet ist, der seinerseits vom Vorratsbehälter gespeist wird.According to the will of the invention, this object is essentially achieved by doing this through adiabatic Relaxation on the consumer side The heat gradient arising from the supply base load to cool the gas liquefaction process serves, whereby three parallel lines branch off from a gas pipeline, the second (middle) strand essentially consists of a series connection of several There is a heat exchanger and an expansion machine and their third line a part of this heat exchanger is connected in countercurrent, and the over a dem Liquefaction of the gas, known per se, Thomson-Joule valve and via a storage container is in communication with the extraction source, while the first, then essentially serving as an emergency supply line on the outlet side a controller and fed to the gas pipeline via an upstream heat exchanger is, this heat exchanger su the eraten heat exchanger of the second strand is connected in parallel, between which one is used to heat the gas armchair is switched, which in turn is fed from the storage container.

Die mit der vorgeschlagenen Erfindung einhergehenden Vorteile eind einleuchtend und überzeugend zugleich: Zunächst einmal gewährleistet das insoweit vorgeschlagene Verfahren durch die energetische Kopplung seiner verschiedenen Kreisläufe eine äußerst wirtschaftliche Betriebsweise, wodurch eich äußerst niedrige Kosten zum Betrieb der Kälteanlage ergeben. Zugleich wird auch eine kostspielige Aufbereitung der flash- und boil-off-Gase vermieden.The advantages associated with the proposed invention and Obvious and convincing at the same time: First of all, this ensures that proposed method through the energetic coupling of its various Cycles an extremely economical mode of operation, which means extremely low costs for the operation of the refrigeration system. At the same time, there is also an expensive reprocessing the flash and boil-off gases avoided.

Im Gegensatz zu den bekannten Verfahrensweisen sind zum Aufbringen der zum Verflüssigen des Gases erforderlichen Kälteleistung bei Anwendung des erfindungsgemäßen Verfahrens keinerlei Kältemaschinen oder sonstige tthlaggregate erforderlich.In contrast to the known procedures are to apply the refrigeration capacity required to liquefy the gas when using the invention The process does not require any refrigeration machines or other cooling units.

Die erfindungsgemäße Verfahrensweise ist anhand des in der Zeichnung dargestellten Schemas im folgenden näher erläuterte Von der mit 1 bezeichneten Ferngasleitung zweigen drei zueinander parallel verlaufende Leitungsstränge I, II, III ab.The procedure according to the invention is based on the in the drawing Scheme illustrated in the following explained in more detail from the gas pipeline designated by 1 branch off three line strands I, II, III that run parallel to one another.

Der mittlere Strang II besteht im wesentlichen aus einer Serienschaltung der Wärmetauscher 2, 3, 4, 5 und der Entspannungsmaschine 6t Strang III ist auf einen Teil dieser Wärmetauscher, und zwar die Wärmetauscher 5, 4 und 3, im Gegenstrom geschaltet. Vom Wärmetauscher 3 verläuft der Strang III sodann über ein dem Verflüssigen des Gases dienendes, an sich bekanntes Thomson-Joule-Ventil 7 zu dem Vorratsbehälter 8, von wo aus er schließlich zu der Entnahmequelle 9 gelangt.The middle strand II essentially consists of a series circuit the heat exchanger 2, 3, 4, 5 and the expansion machine 6t line III is on part of these heat exchangers, namely the heat exchangers 5, 4 and 3, in countercurrent switched. From the heat exchanger 3 the strand III then runs over a known Thomson-Joule valve serving to liquefy the gas 7 to the storage container 8, from where it finally arrives at the extraction source 9.

Der im wesentlichen als Notversorgung und Temperatursteuerung des Gases - etwa im Falle einer Störung des Stranges II - dienende Strang I führt vom Regler 10 aus Uber den Wärmetauscher 11 zur Ferngasversorgungsleitung 1.Essentially as an emergency supply and temperature control of the Gas - for example in the event of a fault in strand II - serving strand I leads from Controller 10 from U via the heat exchanger 11 to the long-distance gas supply line 1.

Der Wärmetauscher 11 ist zum Wärmetauscher 2 des Stranges II parallel geschaltet. In der Paralleischaltung der Wärmetauscher 11 und 2 ist ein der Widererwärmung des Gases dienender Kessel 12 angeordnet, der seinerseits von dem Vorratsbehälter 8 gespeist wird.The heat exchanger 11 is parallel to the heat exchanger 2 of the line II switched. In the parallel connection of the heat exchangers 11 and 2, one is used for reheating of the gas serving boiler 12 arranged, which in turn from the storage container 8 is fed.

Erwähnung bedarf noch die Tatsache, daß im Strang II swischen den Wärmetauschern 5 und 4 ein Antriebsaggregat, etwa ein Kompressor 12, in Reihe angeordnet iet, falls der Druck der Ferngasversorgungsleitung 1 einen Nindestwert unterschreitet.Mention still needs to be made of the fact that in strand II swish the Heat exchangers 5 and 4, a drive unit, such as a compressor 12, arranged in series iet if the pressure of the gas supply line 1 falls below a minimum value.

Zum Zwecke des Erhöhens des adiabatischen Wärmegefälles an der Entspannungsmaschine 6 erfolgt das Rückführen des am Flüssiggasspreicher 8 sowie im Verfltlssigungsprozeß anfallenden flash- und boil-off-Gases über den Kessel 12 und den Wärmetauscher 2.For the purpose of increasing the adiabatic heat gradient on the expansion machine 6 takes place the return of the liquid gas accumulator 8 as well as in the liquefaction process accruing flash and boil-off gas via the boiler 12 and the heat exchanger 2.

Das im Strang II unterkühlt aus der Entspannungsmaschine 6 austretende Treibmedium wird zur Verkühlung im Wärmetauscher 5, zur Zwischenkühlung im Wärmetauscher 4 sowie schließlich zur Unterkühlung des Stranges III im Wärmetauscher 3 ausgenutzt. Das Gas des Stranges III wird über die mit dem Thomson-Joule-Ventil verbundene Verflüssigungeeinrichtung 7 in den Vorratsbehälter 8 geleitet. Mit den Wärmetauschern 5, 4, 3 erfolgt zugleich die Wiedererwärmung der Grundlast auf Verbrauchstemperatur durch die im vorstehenden schon geschilderte Wärmekopplung innerhalb des Prozeßablaufes.The supercooled exiting from the expansion machine 6 in line II Driving medium is used for cooling in the heat exchanger 5 and for intermediate cooling in the heat exchanger 4 and finally used for subcooling the line III in the heat exchanger 3. The gas of line III is via the liquefaction device connected to the Thomson-Joule valve 7 passed into the storage container 8. With the heat exchangers 5, 4, 3 takes place at the same time the reheating of the base load to the consumption temperature by the above already described heat coupling within the process sequence.

Der Wärmetauscher 11, der an die Kesselanlage 12 angeschlossen ist, dient dem Aufwärmen des Gases, während der Regler 10 zum Druckabbau der Last bei Ausfall des Stranges II bzw. zum Beimischen vorgesehen ist, falls das Gas des Stranges II noch zu kalt su dem der Entnahmequelle 9 nachgeschalteten und nicht zur Erfindung gehörenden Vervorgunganets gelangt.The heat exchanger 11, which is connected to the boiler system 12, is used to warm up the gas, while the regulator 10 is used to reduce the pressure of the load Failure of strand II or is intended for admixture if the gas in the strand II still too cold su that downstream of the extraction source 9 and not related to the invention belonging to Vervorgunganets.

Bei Stillstand des Stranges III kann die elektrische Energie zum Betrieb der Ent epannungemasohine 6 auch anderen, im Schema nicht dargestellten Verbrauchern und/oder Versorgungsnetzen zugeführt werden.When strand III comes to a standstill, the electrical energy can be used the Ent epehnemasohine 6 also to others, not shown in the scheme Consumers and / or supply networks are supplied.

In Betracht gezogene Druckschrtftens Aufsatz: "Die Verflüssigung von Erdgas" Verf.: Dipl.-Ing. W. Förg u. Dipl.-Ing. V. Stsbach, München; (Linde-Berichte aus Technik und Wissenschaft, Heft 28/1970, SS. 27 ... 39).Subjects Essay: "The liquefaction of Natural gas "Author: Dipl.-Ing.W. Förg and Dipl.-Ing.V. Stsbach, Munich; (Linde reports from technology and science, issue 28/1970, pp. 27 ... 39).

Claims (1)

Pat entanspruch Patent entitlement Veriahren zum Verflüssigen von Erdgas od.dgl., das dem Verbraucher über eine Ferngasleitung zugeführt wird, dadurch gekennzeichnet, daß das durch adiabatische Entspannung der verbraucherseitigen Versorgungsgrundlast entstehende Wärmegefälle zum Kühlen des Gasverflüssigungs-Prozesses dient, wobei von einer Ferngasleitung (1) drei zueinander parallele Stränge (I, II, III) abzweigen, deren sweiter (mittlerer) Strang (II) im wesentlichen aus der Serienschaltung mehrerer Wärmetauscher (2, 3, 4,5) und einer Entspannungsmaschine (6) besteht und deren dritter Strang (III) auf einen Teil dieser Wärmetauscher (5, 4, 3) im Gegenstrom geschaltet ist, und der über ein dem Verflüssigen des Gases dienendes, an sich bekanntes Thomson-Joule-Ventil (7) sowie über einen Vorratsbehälter (8) mit der Entnahmequelle (9) in Verbindung steht, während der erste, im wesentlichen als Notversorgung dienende Strang (I) an der Austrittsseite sodann über einen Regler (10) und über einen vorgeschalteten Wärmetauscher (11) der Ferngasleitung (1) zugeführt wird, wobei dieser Wärmetauscher (11) zu dem ersten Wärmetauscher (2) des zweiten Stranges (II) parallel geschaltet ist, zwischen welchen ein der Aufwärmung dee Gases dienender Kessel (12) geschaltet ist, der seinerseits vom Vorratsbehälter (8) gespeist wird.Veriahren to liquefy natural gas or the like. That the consumer is supplied via a long-distance gas line, characterized in that the adiabatic Relaxation of the consumer-side supply base load resulting from the heat gradient is used to cool the gas liquefaction process, from a gas pipeline (1) branch off three parallel strings (I, II, III), the other (middle) Line (II) essentially consists of the series connection of several heat exchangers (2, 3, 4.5) and a relaxation machine (6) and its third line (III) a part of this heat exchanger (5, 4, 3) is connected in countercurrent, and the via a known Thomson-Joule valve which is used to liquefy the gas (7) and via a storage container (8) with the extraction source (9) in connection stands, while the first, mainly used as an emergency supply line (I) on the outlet side then via a controller (10) and via an upstream one Heat exchanger (11) of the gas pipeline (1) is supplied, this heat exchanger (11) connected in parallel to the first heat exchanger (2) of the second line (II) is, between which a boiler (12) serving to heat up the gas is connected is, which in turn is fed from the storage container (8). L e e r s e i t eL e r s e i t e
DE19702036344 1970-07-22 1970-07-22 Liquefying natural gas - with total energy system using adiabatic expansion for cooling Pending DE2036344A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006013686B3 (en) * 2006-03-22 2007-10-11 Technikum Corporation Process for the liquefaction of natural gas

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006013686B3 (en) * 2006-03-22 2007-10-11 Technikum Corporation Process for the liquefaction of natural gas

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