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EP1353113B1 - Device for discharging gas carrying vessels - Google Patents

Device for discharging gas carrying vessels Download PDF

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Publication number
EP1353113B1
EP1353113B1 EP03001813A EP03001813A EP1353113B1 EP 1353113 B1 EP1353113 B1 EP 1353113B1 EP 03001813 A EP03001813 A EP 03001813A EP 03001813 A EP03001813 A EP 03001813A EP 1353113 B1 EP1353113 B1 EP 1353113B1
Authority
EP
European Patent Office
Prior art keywords
pump
tank
cargo tank
gas
cargo
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
EP03001813A
Other languages
German (de)
French (fr)
Other versions
EP1353113A3 (en
EP1353113A2 (en
Inventor
Horst Gerhard
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.)
LEHNKERING REEDEREI GmbH
Original Assignee
Lehnkering Reederei GmbH
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 Lehnkering Reederei GmbH filed Critical Lehnkering Reederei GmbH
Publication of EP1353113A2 publication Critical patent/EP1353113A2/en
Publication of EP1353113A3 publication Critical patent/EP1353113A3/en
Application granted granted Critical
Publication of EP1353113B1 publication Critical patent/EP1353113B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0135—Pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships

Definitions

  • the invention accordingly includes a system for discharging gas tankers, in particular for extinguishing liquefied gases under pressure, the system comprising at least two cargo tanks, which are arranged on the ship and which consist of pressure vessels wherein at least one cargo tank is equipped with a pump and at least one further cargo tank is provided without a pump, leaving a tank from a suction line for a gas to be sucked from the tank gas phase, via a compressor and a pressure line for the compressed gas with the other Tank is connected. Further, a line for discharging a liquid phase from the second tank is provided in the first tank, wherein on the first tank, a conduit for conveying the liquid is provided by the pump to a land plant.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Pipeline Systems (AREA)

Abstract

In a system to discharge a bulk cargo of pressurised liquid gas from a ship's tanks (1), at least one of the tanks (1) is equipped with a pump (3) and one further tank (2) has no pump. A suction pipe (4) draws gas from the first tank (1) to a compressor (5) discharging via a pressure pipe (6) to the second tank (2). A further pipe (7) transfers liquid gas from the second tank (2) to the first tank (1). Liquid gas is transferred from the first tank via a pipe (8) to the shore (9).

Description

Die Erfindung betrifft ein System zur Entladung von Gastankschiffen, insbesondere für die Löschung unter Druck verflüssigter Gase.The invention relates to a system for discharging gas tankers, in particular for the deletion under pressure liquefied gases.

Aus der US-PS 6,257,017 B1 , welche als nächstliegender Stand der Technik anzusehen ist, und den einleitenden Teil von Anspruch 1 entspricht, ist ein Verfahren zur Entladung von unter Druck stehendem verflüssigtem Gas aus Containern durch Erzeugung eines Verdrängungsgases bekannt. Dabei sind zahlreiche Schritte zur Erzeugung des Verdrängungsgases aus dem unter Druck stehenden verflüssigten zu entladenen Gas erforderlich.From the U.S. Patent 6,257,017 B1 , which is to be regarded as the closest prior art and corresponds to the introductory part of claim 1, a method for discharging liquefied gas under pressure from containers by generating a displacement gas is known. There are numerous steps required to generate the displacement gas from the pressurized liquefied gas to be discharged.

Die Druckbehälter der Gastankschiffe können üblicherweise auf zwei verschiedene Arten geleert werden. In den Tanks befindet sich unter Druck verflüssigtes Gas in zwei Phasen. Einer flüssigen und einer gasförmigen Phase. Die erste Möglichkeit zur Entleerung der Behälter besteht darin, den Druck in den Behältern durch Zuführung von Gas im gasförmigen Aggregatzustand zu erhöhen und somit Gas im flüssigen Aggregatzustand zu einer Förderpumpe zu drücken. Wesentliches Merkmal einer solchen Anlage ist das Vorhandensein eines Gaskompressors zur Druckerhöhung und einer Boosterpumpe, die meist zentral an Deck angeordnet ist.The pressure vessels of the gas tankers can usually be emptied in two different ways. The tanks contain liquefied gas in two phases under pressure. A liquid and a gaseous phase. The first possibility for emptying the container is to increase the pressure in the containers by supplying gas in the gaseous state and thus to press gas in the liquid state of aggregation to a feed pump. An essential feature of such a system is the presence of a gas compressor for increasing the pressure and a booster pump, which is usually arranged centrally on the deck.

Die zweite Möglichkeit zur Entleerung der Behälter ist die Verwendung von Tauchpumpen. Hier sind die Pumpen direkt in der Flüssigphase installiert und fördern ohne zusätzliche Zuführung von Gas das Produkt aus den Tanks. Wesentliches Merkmal ist hier, dass jeder Behälter mit einer Pumpe ausgestattet werden muss. Die Aufgabe der Erfindung besteht darin, die bekannten Systeme zur Entleerung von Druckbehältern auf Gastankschiffen zu verbessern.The second option for emptying the containers is the use of submersible pumps. Here, the pumps are installed directly in the liquid phase and convey the product from the tanks without additional supply of gas. The essential feature here is that each container must be equipped with a pump. The object of the invention is to improve the known systems for emptying pressure vessels on gas tankers.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen der erfindungsgemäßen Vorrichtung ergeben sich aus den zugehörigen Ansprüche 2 bis 5.According to the invention, this object is solved by the features of claim 1. Advantageous embodiments of the device according to the invention will become apparent from the accompanying claims 2 to 5.

Die Erfindung beinhaltet demnach System zur Entladung von Gastankschiffen, insbesondere zur Löschung unter Druck verflüssigter Gase, wobei das System mindestens zwei auf dem Schiff angeordnete, aus Druckbehältern bestehende Ladetanks umfasst, wobei mindestens ein Ladetank mit einer Pumpe ausgestattet ist und mindestens ein weiterer Ladetank ohne Pumpe vorgesehen ist, wobei von einem Tank eine Saugleitung für eine aus dem Tank abzusaugende Gasphase abgeht, die über einen Kompressor und einer Druckleitung für das verdichtete Gas mit dem anderen Tank verbunden ist. Ferner ist eine Leitung zur Ableitung einer flüssigen Phase vom zweiten Tank in den ersten Tank vorgesehen, wobei am ersten Tank eine Leitung zur Förderung der Flüssigkeit durch die Pumpe an eine Landanlage vorgesehen ist. Nach einem besonderen Merkmal der Erfindung können auf dem Schiff mehrere Tanks der ersten Art mit einer beliebigen Anzahl Ladetanks der anderen Art kombiniert sein. Die Behälter der ersten Art sind vorzugsweise vakuumfest ausgebildet. Nach einem weiteren Merkmal dient der Ladetank der ersten Art als Gasspender für den Kompressor. Die Pumpe ist bevorzugt als Tauchpumpe ausgeführt.The invention accordingly includes a system for discharging gas tankers, in particular for extinguishing liquefied gases under pressure, the system comprising at least two cargo tanks, which are arranged on the ship and which consist of pressure vessels wherein at least one cargo tank is equipped with a pump and at least one further cargo tank is provided without a pump, leaving a tank from a suction line for a gas to be sucked from the tank gas phase, via a compressor and a pressure line for the compressed gas with the other Tank is connected. Further, a line for discharging a liquid phase from the second tank is provided in the first tank, wherein on the first tank, a conduit for conveying the liquid is provided by the pump to a land plant. According to a particular feature of the invention, several tanks of the first type can be combined with any number of cargo tanks of the other type on the ship. The container of the first type are preferably formed vacuum-resistant. According to another feature, the cargo tank of the first kind serves as a gas dispenser for the compressor. The pump is preferably designed as a submersible pump.

Die vorliegende Erfindung besteht demnach in einer neuen Kombination an sich bekannter Anordnungen. Dabei wird mindestens ein Tank mit einer Tauchpumpe ausgerüstet. Die nicht mit Pumpen ausgerüsteten Behälter werden mittels der o. a. Druckerhöhung in Behälter mit Tauchpumpen geleert. Dadurch wird eine Einsparung in der Pumpeninvestition sowie eine größere Flexibilität erreicht.The present invention thus consists in a new combination of known arrangements. At least one tank is equipped with a submersible pump. The containers not equipped with pumps are replaced by means of the o. A. Pressure increase emptied into containers with submersible pumps. This achieves savings in pump investment and greater flexibility.

Die Erfindung soll anhand der nachfolgenden Beschreibung von bevorzugten Ausführungsbeispielen unter Bezugnahme auf der zugehörigen Figur näher erläutert werden. Es zeigen:

Figur: 1
ein System zur Entladung von Gastankschiffen in schematischer Darstellung.
The invention will be explained in more detail with reference to the following description of preferred embodiments with reference to the accompanying figure. Show it:
Figure: 1
a system for unloading gas tankers in a schematic representation.

Das erfindungsgemäße System besteht im Wesentlichen aus den Komponenten: Ladetank 1 mit Tauchpumpe 3, Ladetank 2 ohne Pumpe, Kompressor 5 und einem Rohrleitungssystem zur Verrohrung.
In der Figur 1 ist das System dargestellt, welches aus 2 Druckbehältern in Form der Ladetanks 1 und 2 besteht. Das System besteht aus mindestens einem Behälter des Typs 1, kombiniert mit einer beliebigen Anzahl von Behältern des Typs 2.
Der Kompressor 5 saugt über eine Saugleitung 4 aus dem Ladetank 1 mit Pumpe 3 die Gasphase ab und drückt das verdichtete Gas über die Druckleitung 6 auf den Ladetank 2. Im Ladetank 2 (ohne Pumpe) wird der Druck erhöht, im Ladetank 1 (mit Pumpe 3) abgesenkt. Aufgrund der Druckdifferenz strömt die Flüssigphase aus dem Ladetank 2 (ohne Pumpe) über die Flüssigleitung 7 in den Ladetank 1 (mit Pumpe 3). Aus diesem wird die Flüssigkeit mit einer Pumpe 3 über die Abgabeleitung 8 zu einer Landanlage 9 gefördert. Die Förderung durch die Pumpe 3 kann durch eine Deepwellpumpe (Pumpe im Tank; Motor außerhalb, über eine durch die Tankwandung geführte Welle verbunden) oder durch eine Submerged Pump-Tauchmotorpumpe (Pumpe und Antriebsmotor innerhalb des Tanks) erfolgen.
Die in der aus Ladetank 2 (ohne Pumpe) überströmende Flüssigkeit enthaltene Wärmemenge verhindert die Auskühlung des Ladetanks 1 (mit Pumpe 3) durch die entzogene Verdampfungswärme. Die alternativ vakuumfeste Auslegung des Ladetanks 1 (mit Pumpe 3) ermöglicht den Betrieb des Systems bei niedrigen Produkttemperaturen. Das Absenken des Behälterinnendrucks des Ladetanks 1 (mit Pumpe 3) unter den atmosphärischen Druck gestattet hierbei dessen Verwendung als sicheren Gasspender für den Kompressor.The system according to the invention consists essentially of the components: cargo tank 1 with submersible pump 3, cargo tank 2 without pump, compressor 5 and a piping system for piping.
In the figure 1, the system is shown, which consists of 2 pressure vessels in the form of the cargo tanks 1 and 2. The system consists of at least one type 1 container combined with any number of type 2 containers.
The compressor 5 sucks via a suction line 4 from the cargo tank 1 with pump 3 from the gas phase and presses the compressed gas via the pressure line 6 to the cargo tank 2. In the cargo tank 2 (without pump), the pressure is increased in the cargo tank 1 (with Pump 3) lowered. Due to the pressure difference, the liquid phase flows from the cargo tank 2 (without pump) via the liquid line 7 into the cargo tank 1 (with pump 3). For this, the liquid is conveyed by a pump 3 via the discharge line 8 to a land plant 9. Delivery by the pump 3 can be accomplished by a deepwell pump (pump in the tank, motor outside, via a shaft led through the tank wall) or by a submersible pump submersible pump (pump and drive motor inside the tank).
The amount of heat contained in the liquid overflowing from charging tank 2 (without pump) prevents the cooling of the cargo tank 1 (with pump 3) by the heat of vaporization removed. The alternative vacuum-tight design of the cargo tank 1 (with pump 3) allows the system to operate at low product temperatures. Lowering the tank internal pressure of the cargo tank 1 (with pump 3) below the atmospheric pressure allows its use as a safe gas dispenser for the compressor.

Claims (5)

  1. System for discharging gas container ships, more especially for discharging pressurized liquid gas, wherein the system includes at least two cargo tanks consisting of pressure tanks disposed on the ship, characterized in that at least one cargo tank (1) is provided with a pump (3) and at least one additional cargo tank (2) is provided without a pump, wherein an intake line (4) for a gas phase to be drawn off the cargo tank (1) with pump (3) extends from the cargo tank (1) with pump (3), said intake line being connected to the cargo tank without a pump by means of a compressor (5) and a pressure line (6) for the condensed gas, in addition there is provided a line (7) for diverting a liquid phase from the cargo tank (2) without pump into the cargo tank (1) with pump, wherein a line (8) for conveying the liquid to a land system (9) by means of the pump (3) is provided at the cargo tank (1) with pump.
  2. System according to Claim 1, characterized in that a plurality of cargo tanks (1) with pump are combined with an arbitrary number of cargo tanks (2) without pump on the ship.
  3. System according to Claims 1 and 2, characterized in that the cargo tank (1) with pump (3) is vacuum-tight.
  4. System according to one of the abovementioned claims, characterized in that the cargo tank (1) with pump (3) serves as gas dispenser for the compressor (5).
  5. System according to one of the abovementioned claims, characterized in that the pump (3) is a submersible pump.
EP03001813A 2002-04-13 2003-01-29 Device for discharging gas carrying vessels Expired - Lifetime EP1353113B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20205786U DE20205786U1 (en) 2002-04-13 2002-04-13 System for unloading gas tankers
DE20205786U 2002-04-13

Publications (3)

Publication Number Publication Date
EP1353113A2 EP1353113A2 (en) 2003-10-15
EP1353113A3 EP1353113A3 (en) 2007-04-04
EP1353113B1 true EP1353113B1 (en) 2009-05-27

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EP03001813A Expired - Lifetime EP1353113B1 (en) 2002-04-13 2003-01-29 Device for discharging gas carrying vessels

Country Status (3)

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EP (1) EP1353113B1 (en)
AT (1) ATE432443T1 (en)
DE (2) DE20205786U1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025101082A1 (en) * 2023-11-06 2025-05-15 Knutsen Nyk Carbon Carriers As A storage and transportation tank assembly for products at elevated pressures

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009028109A1 (en) 2009-07-30 2011-02-03 Tge Marine Gas Engineering Gmbh Fuel gas system for merchant ships
DE102009047117B4 (en) 2009-11-25 2016-06-16 Tge Marine Gas Engineering Gmbh Method and system for unloading a cargo tank for cryogenic liquefied gas

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO132442L (en) * 1971-12-29 1900-01-01
NO148481C (en) * 1980-07-08 1983-10-19 Moss Rosenberg Verft As PROCEDURE FOR TRANSPORTING OIL AND GAS UNDER HIGH PRESSURE IN TANKER ON BOARD OF A SHIP
DE3225300A1 (en) 1982-07-07 1984-01-12 Drago Dipl.-Ing. 5020 Frechen Kober Refrigerated semipressurised LPG gas tanker
NO179317C (en) 1994-06-13 1996-09-18 Preben Rasmussen Apparatus and method for continuous emptying of liquid-filled tank
WO1996021121A1 (en) 1994-12-30 1996-07-11 Jonas Joern M A method of draining a tank and a plant for use in such draining
TW446800B (en) 1998-12-18 2001-07-21 Exxon Production Research Co Process for unloading pressurized liquefied natural gas from containers
MY115510A (en) * 1998-12-18 2003-06-30 Exxon Production Research Co Method for displacing pressurized liquefied gas from containers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025101082A1 (en) * 2023-11-06 2025-05-15 Knutsen Nyk Carbon Carriers As A storage and transportation tank assembly for products at elevated pressures

Also Published As

Publication number Publication date
DE50311542D1 (en) 2009-07-09
ATE432443T1 (en) 2009-06-15
EP1353113A3 (en) 2007-04-04
EP1353113A2 (en) 2003-10-15
DE20205786U1 (en) 2002-08-14

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