EP1776541B1 - Method and device for filling a container with liquid gas from a storage tank - Google Patents

Method and device for filling a container with liquid gas from a storage tank Download PDF

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Publication number
EP1776541B1
EP1776541B1 EP05776200A EP05776200A EP1776541B1 EP 1776541 B1 EP1776541 B1 EP 1776541B1 EP 05776200 A EP05776200 A EP 05776200A EP 05776200 A EP05776200 A EP 05776200A EP 1776541 B1 EP1776541 B1 EP 1776541B1
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EP
European Patent Office
Prior art keywords
gas
container
storage tank
liquid
heat exchanger
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.)
Active
Application number
EP05776200A
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German (de)
French (fr)
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EP1776541A1 (en
Inventor
Patrick Matheoud
Jean-Claude Zimmer
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Messer France SAS
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Messer France SAS
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Publication of EP1776541A1 publication Critical patent/EP1776541A1/en
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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
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/02—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases
    • 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
    • F17C2201/0128—Shape spherical or elliptical
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0123—Mounting arrangements characterised by number of vessels
    • F17C2205/013—Two or more vessels
    • F17C2205/0134—Two or more vessels characterised by the presence of fluid connection between vessels
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0335—Check-valves or non-return valves
    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0146—Two-phase
    • F17C2225/0153—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
    • F17C2227/0114—Propulsion of the fluid with vacuum injectors, e.g. venturi
    • 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
    • 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
    • F17C2227/0157—Compressors
    • 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
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0337—Heat exchange with the fluid by cooling
    • F17C2227/0339—Heat exchange with the fluid by cooling using the same fluid
    • 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
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0367—Localisation of heat exchange
    • F17C2227/0369—Localisation of heat exchange in or on a vessel
    • F17C2227/0374—Localisation of heat exchange in or on a vessel in the liquid
    • 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
    • F17C2227/04—Methods for emptying or filling
    • 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
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/043—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
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0443—Flow or movement of content
    • 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
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0636—Flow or movement of content
    • 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
    • F17C2270/0165—Applications for fluid transport or storage on the road
    • F17C2270/0168—Applications for fluid transport or storage on the road by vehicles
    • F17C2270/0171—Trucks

Definitions

  • the invention relates to a method and a device for filling a container with liquid gas from a storage container.
  • the refueling of a liquid gas container takes place in such a way that the liquid gas is pumped in liquid form from a storage tank into the container.
  • the gas phases of the liquid gas in the container and in the storage tank are at the same time flow-connected to one another via a separate gas line. In this way, a quantity of gas which corresponds to the volume of the liquid gas supplied to the container reaches the storage tank.
  • a disadvantage of this known filling method is that in the case of contamination of the container to be filled while the gas phase of the storage tank is contaminated. If more containers are filled from this storage tank, it also leads to contamination of these containers. In addition, during a subsequent refueling of the storage tank there is a risk that the main tank in the production site of the liquefied gas is contaminated.
  • a method and a device for filling a container with LPG from a storage tank is known in which the Liquefied gas is transferred in a liquid gas supply line by means of a multi-stage conveyor from the storage tank into the container.
  • Gas phase of the container to be filled is connected to a gas return line, which: opens in the area between two pump stages of the conveyor in the liquid gas inlet from the storage tank.
  • gas in the volume of the liquid gas supplied from the storage tank is taken from the container, liquefied and fed back into the container in liquid form, together with liquid gas from the storage tank. This results in an automatic Druckregutleiter in the container.
  • the gas phases of the container and storage tank are not in fluid communication, thereby precluding cross-contamination.
  • a disadvantage of this method is the high expenditure on equipment and the practical difficulty of adapting the pumping powers of the individual conveyor stages to the respective requirements.
  • the liquefied gas is then fed to an injector, for example a Venturi nozzle, which, in order to avoid cavitation caused by pressure drop, is arranged upstream of the pump in the liquid feed line.
  • an injector for example a Venturi nozzle
  • the liquefied gas flowing out of the heat exchanger is admixed with the liquid gas flowing in the liquid gas feed line.
  • the heat exchanger is according to the teaching of WO / 081963 preferably arranged in the interior of the storage tank; the cooling of the gas taken from the container to be filled thus simultaneously leads to the evaporation of liquid gas in the storage tank and thus to a pressure increase in the storage tank which promotes the filling.
  • a disadvantage of this system is that it usually fails to completely liquefy the gas introduced via the injector. There remains a more or less large part of gaseous substance, which significantly reduces the efficiency of the filling. As a result, the use of relatively strong and therefore more expensive and in use energy-intensive pumps is required. In particular, when used in mobile filling devices, such as road tankers, this leads to a considerably higher cost in the execution of the vehicles.
  • Object of the present invention is therefore to provide a way to fill a container with liquid gas from a storage tank, specify that manages with less equipment and yet reliably prevents cross-contamination between the container and storage tank.
  • a conveyor gas is supplied in the liquid state from a reservoir to the container to be filled and compresses the gas phase present in the container to be filled.
  • the container to be filled gas is removed, which is fed to a heat exchanger and at least largely liquefied.
  • the at least largely liquefied gas is added to the liquid gas from the reservoir suction side to the conveyor and then conveyed together with this in the container.
  • a further embodiment of the invention provides that the differential pressure between the pressure in the container and the pressure of the reservoir is detected directly or indirectly and the liquefied in the heat exchanger gas is supplied only in the presence of a predetermined, minimum differential pressure of the liquid feed line. As a result, the formation of cavitations in the liquid supply is suppressed.
  • the exact level of the minimum differential pressure depends on the choice of equipment used, in particular on the characteristics of the heat exchanger, the capacity of the pump and the ability of the pump to tolerate a certain proportion of gas in the pumped stream without significant drop in pumping power.
  • the minimum differential pressure to be selected for the respective equipment can be determined empirically, for example, before commissioning or delivery of a refueling unit operating according to the invention.
  • the detection of the pressure difference is expediently carried out continuously or at regular time intervals.
  • the detection of the pressure difference or of the pressure can take place in the containers themselves or in the region of the feed and discharge lines or at another point, provided that the measurement can clearly deduce the differential pressure at the blocking valve.
  • a preferred embodiment of the invention makes from the of WO 02/081963 A1 known and proven arrangement use to perform the heat exchanger such that a heat exchange between the gas to be liquefied and the liquefied gas in the reservoir. So it comes in this way to a transfer of heat from the container to the storage tank. The heat released in the condensation of the gas from the container heat is used to vaporize gas in the reservoir and in this way to maintain the gas pressure in the reservoir during the removal of the liquefied gas.
  • a further advantageous embodiment of the invention provides for the gas taken from the container to be filled to be supplied to a heat exchanger compacted. This can be done, for example, by means of a compressor arranged in the gas discharge.
  • the inventive device thus comprises connected to the reservoir and connectable to the container liquid supply line, which is equipped with a conveyor for conveying liquefied gas into the container, and with a connectable to the container gas discharge, which passes through a heat exchanger and on a suction side to the conveyor arranged connection point with the liquid supply is in flow communication.
  • the conveyor transports gas in the liquid state via the liquid supply line from the storage container into the container to be filled.
  • About the gas discharge gas is removed from the container and fed to the heat exchanger. In the heat exchanger, heat is withdrawn from the gas, thereby at least partially liquefying it.
  • the liquefied gas is fed into the liquid feed line.
  • the heat exchanger is expediently designed such that it produces a thermal contact between the gas which has been taken from the container and the gas which is present in the liquid and / or gaseous state in the storage container. Thus, there is a heat transfer from the gas in the storage container the gas from the container to be filled instead.
  • the heat exchanger can be arranged anywhere in the vicinity of the storage tank, a particularly good heat transfer is achieved, however, when the heat exchanger is disposed within the reservoir.
  • a control device in the gas discharge, consisting of a fluidically behind the heat exchanger arranged blocking valve and means for detecting the differential pressure in front of and behind this blocking device, which actuates the blocking valve upon reaching a predetermined pressure condition.
  • a control device is provided in the gas discharge, consisting of a fluidically behind the heat exchanger arranged blocking valve and means for detecting the differential pressure in front of and behind this blocking device, which actuates the blocking valve upon reaching a predetermined pressure condition.
  • Any suitable fitting can be used as a blocking fitting by means of which a pressure difference can be maintained, that is, for example, a throttle, a flap or a valve.
  • a calibrated or calibratable valve which opens or closes at a fixed or individually adjustable value of the differential pressure is particularly preferably used.
  • a further embodiment of the invention provides to arrange a compressor in the gas discharge, preferably in the region between the container to be filled and the heat exchanger.
  • An expedient development of the invention provides to provide a means for preventing the backflow of liquefied gas into the storage tank in the area between the storage tank and the connection point, for example a check valve. In particular, disturbances in the operation so that the risk of cross-contamination is avoided.
  • a yet further advantageous embodiment of the invention provides to provide a multistage pump as a delivery device and to provide the connection point in the liquid feed line between two pump stages.
  • An expedient embodiment of the invention provides that the storage tank and / or the container may be arranged in a mobile supply unit, such as a road tanker or a railroad tank car.
  • Fig. 1 shows a container 1, which is intended for the storage of liquefied petroleum gas, for example carbon dioxide.
  • the liquid gas stored in the container 1 is present both in a liquid phase 2 and in a gas phase 3.
  • the container 1 is further provided in this not interesting and therefore not shown manner with connections for supplying consumers with gas in the liquid or gaseous state.
  • the container 1 is equipped with a respective liquid connection line 4 and with a gas return line 5.
  • the container 1 is supplied with fresh liquefied gas from a storage tank 6.
  • storage tank 6 is part of a refueling system 10, which is mounted, for example, on a mobile tank unit, such as a road tanker or a railroad tank car.
  • the refueling system 10 can also be a fixed installation constructed approximately in the vicinity of a production facility for the liquefied gas, which is intended to fill a mobile container or refueling installation mounted on a road tanker or a railroad tank car;
  • the container 1 can also be a storage container for supplying liquid gas to further containers or customer tanks, which in turn is part of a refueling system of the type described here.
  • the refueling system 10 has the facilities described below.
  • a liquefied gas line 7 is arranged on the storage tank 6. As in the container 1, the liquid gas is also present in the storage tank 6 in a liquid phase 8 and a gas phase 9.
  • the liquefied gas line 7 opens into the storage tank 6 in a lower region and therefore establishes a flow connection with the liquid phase 8 of the liquefied gas stored in the storage tank 6.
  • the liquefied gas line 7 opens at its end facing away from the storage tank 7 end in a connecting piece 11, by means of which a releasable connection with a corresponding connection piece 12 on the liquid connection line 4 can be produced.
  • a gas line 13 is further provided, which is also connectable to a connector 14 with a connector 15 of the gas return line 5.
  • a pump 16 is arranged, which is intended for the promotion of liquid gas (in the liquid state) from the storage tank 6 into the container 1.
  • a flow meter 20 is provided downstream of the pump 16.
  • the gas line 13 opens at its end opposite the connection 14 into a heat exchanger 19.
  • the heat exchanger 19 establishes a thermal contact between the gas flowing from the gas line 13 into the heat exchanger 19 and the liquid gas inside the storage tank 6 and is arranged in the interior of the storage tank 6 in the exemplary embodiment, in such a way that the supply of the gas in the Heat exchanger 19 from above, that is through the gas phase 9 through and the heat exchange surfaces have a good thermal contact with the liquid phase 8.
  • the now cooled and at least partially liquefied gas passes into a conduit 17 which is connected to the liquid line 7 at a connection point 18 arranged on the suction side to the conveyor 16.
  • the gas flowing in from the line 17 mixes in the liquefied gas line 7 with the liquid gas withdrawn from the storage tank 6 and is then fed together with the liquid phase 2 of the gas in the container 1.
  • the connecting pieces 11 and 12 are connected to one another in order to establish a flow connection between the storage tank 6 and the container 1 to be filled.
  • the connecting pieces 14 and 15 are connected to each other.
  • liquid gas is pressed in the liquid state into the container 1, whereby the pressure in the container 1 increases.
  • Gas flows in the gaseous state from the gas phase 3 of the liquid gas present in the container 1 via the gas lines 5 and 13 in the heat exchanger 19 a.
  • the introduced in this heat exchange in the storage tank 6 heat leads to the evaporation of a portion of the liquid phase 8 and helps to maintain the pressure in the interior of the storage tank 6 despite the ongoing removal of liquid gas upright or even increase.
  • a multi-stage pump provided that the connection point 18 is arranged between two pump stages.
  • FIG. 2 differs from the previously described only by an additional control device 21 in the line 17, fluidly arranged in front of the connection point 18.
  • an additional control device 21 in the line 17, fluidly arranged in front of the connection point 18.
  • the control device 21 comprises a blocking device, such as a valve, a flap or a throttle, by means of which the flow through the line 17 can be influenced.
  • the control device 21 has a differential pressure measuring device, by means of which the pressure difference can be determined in terms of flow before and behind the blocking valve, and on the blocking valve in Dependent on the pressure difference acts, so for example at a certain value of the pressure difference, the blocking valve opens or closes.
  • the control device 21 can be realized in the simplest case: for example, by a calibrated or calibratable pressure valve, which releases the line 17 above a certain pressure difference, but including it.
  • the detection of the pressure difference can also take place by detecting the differential pressure between the lines 7 and 13 or the containers 1 and 6, or indirectly, by measuring the respective absolute pressures and calculating the difference thereof.
  • the control device 21 ensures that only above a certain pressure difference before and after the control device 21, a flow of the liquefied gas from the line 17 into the liquefied gas line 7 takes place;
  • the pressure upstream of the control device 21 is, for example, 1.5 to 2 bar greater than the pressure downstream of the control device 21 cavitations in the liquefied gas line 7, through which the performance of the pump 16 can be reduced, are thereby reduced so far that the Promotion of the liquefied gas is not affected by the pump 16.
  • the control device can also be set to a lower pressure difference value or close the line 17 even if a certain overpressure value is exceeded in order to prevent cross contamination in the reservoir 6.
  • the value for the minimum pressure difference depends on various sizes of equipment used, in particular the characteristics of the heat exchanger, the flow rate to be handled by the pump and the ability of the pump to tolerate some gas in the delivered stream without a significant reduction in flow rate.
  • the device according to the invention With the device according to the invention that is taken from the container 1. Gas in a circuit returned to the container 1. Thus, the container 1 can be filled without the risk of decontamination of the liquefied gas in the reservoir 6 is.
  • the device according to the invention is suitable for filling containers with any liquid gases or gas mixtures.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Basic Packing Technique (AREA)

Abstract

A method and device for filling a container with liquid gas from a storage tank includes removing the liquefied gas from the storage tank and feeding it to a container via a liquid feed line through use of a delivery system. The gas is compressed in the container and is removed from the container in its gaseous state and is at least partially liquefied by cooling in a heat exchanger. The at least partially liquefied gas is fed into the liquid feed line at the suction end of the delivery device.

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Befüllen eines Behälters mit Flüssiggas aus einem Vorratsbehälter.The invention relates to a method and a device for filling a container with liquid gas from a storage container.

Üblicherweise erfolgt die Betankung eines Flüssiggas - Behälters in der Weise, dass das Flüssiggas in flüssiger Form aus einem Vorratstank in den Behälter gepumpt wird. Um einen Druckausgleich zwischen Vorratstank und Behälter herbeizuführen, sind zugleich die Gasphasen des Flüssiggases im Behälter und im Vorratstank über eine separate Gasleitung miteinander strömungsverbunden. Auf diese Weise gelangt eine Gasmenge, die dem Volumen des dem Behälter zugeführten Flüssiggases entspricht, in den Vorratstank.Usually, the refueling of a liquid gas container takes place in such a way that the liquid gas is pumped in liquid form from a storage tank into the container. In order to bring about a pressure equalization between the storage tank and the container, the gas phases of the liquid gas in the container and in the storage tank are at the same time flow-connected to one another via a separate gas line. In this way, a quantity of gas which corresponds to the volume of the liquid gas supplied to the container reaches the storage tank.

Nachteilig bei diesem vorbekannten Befüllungsverfahren ist, dass im Falle einer Kontaminierung des zu befüllenden Behälters dabei auch die Gasphase des Vorratstanks kontaminiert wird. Werden weitere Behälter aus diesem Vorratstank befüllt, kommt es zur Kontaminierung auch dieser Behälter. Außerdem besteht während einer darauf folgenden Neubetankung des Vorratstanks die Gefahr, dass auch der Haupttank in der Produktionsstätte des Flüssiggases kontaminiert wird.A disadvantage of this known filling method is that in the case of contamination of the container to be filled while the gas phase of the storage tank is contaminated. If more containers are filled from this storage tank, it also leads to contamination of these containers. In addition, during a subsequent refueling of the storage tank there is a risk that the main tank in the production site of the liquefied gas is contaminated.

Eine solche sogenannte Kreuzkontamination kann mit Betankungssystemen vermieden werden, die nur eine Verbindungsleitung für Flüssiggas zwischen Vorratstank und dem zu befüllenden Behälter aufweisen. Es findet dabei also kein Druckausgleich zwischen den Gasphasen von Vorratstank und Behälter mehr statt. Um einen zu starken Druckaufbau im Behälter zu vermeiden, ist es erforderlich, bei der Befüllung die im Behälter befindliche Gasphase in die Umgebung entweichen zu lassen. Beim Ablassen der Gasphase in die Umgebung kann es jedoch zu erheblichen Geräuschemissionen und zu lokafen Luftverschmutzungen kommen. Zudem ist der starke Gasverlust von bis zu 5 % der Gesamtmenge wirtschaftlich kaum zu vertreten.Such a so-called cross-contamination can be avoided with refueling systems, which have only one connecting line for liquid gas between the storage tank and the container to be filled. There is thus no pressure equalization between the gas phases of storage tank and container more. In order to avoid excessive pressure build-up in the container, it is necessary to allow the gas phase in the container to escape into the environment during filling. However, discharging the gas phase into the environment can result in significant noise emissions and local air pollution. In addition, the strong gas loss of up to 5% of the total amount is hardly economically responsible.

Aus der WO 01 /65168 A1 ist ein Verfahren und eine Vorrichtung zum Befüllen eines Behälters mit Flüssiggas aus einem Vorratstank bekannt, bei dem das Flüssiggas in einer Flüssiggaszuleitung mittels einer mehrstufigen Fördereinrichtung aus dem Vorratstank in den Behälter überführt wird. Gasphase des zu: befüllenden Behälters ist mit einer Gasrückleitung verbunden, die: im Bereich zwischen zwei Pumpenstufen der Fördereinrichtung in die Flüssiggaszuleitung aus dem Vorratstank einmündet. Beim Betrieb der Vorrichtung wird Gas im Volumen des aus dem Vorratstank zugeführten Flüssiggases dem Behälter entnommen, verflüssigt und in flüssiger Form, zusammen mit Flüssiggas aus dem Vorratstank, wieder in den Behälter eingespeist. Dadurch erfolgt eine selbsttätige Druckregutierung im Behälter. Die Gasphasen von Behälter und Vorratstank stehen nicht in Strömungsverbindung, wodurch eine Kreuzkontamination ausgeschlossen wird. Nachteilig bei diesem Verfahren ist jedoch der höhe apparative Aufwand und die praktische Schwierigkeit, die Pumpleistungen der einzeinen Förderstufen an die jeweiligen Erfordernisse anzupassen.From the WO 01/65168 A1 a method and a device for filling a container with LPG from a storage tank is known in which the Liquefied gas is transferred in a liquid gas supply line by means of a multi-stage conveyor from the storage tank into the container. Gas phase of the container to be filled: is connected to a gas return line, which: opens in the area between two pump stages of the conveyor in the liquid gas inlet from the storage tank. During operation of the device, gas in the volume of the liquid gas supplied from the storage tank is taken from the container, liquefied and fed back into the container in liquid form, together with liquid gas from the storage tank. This results in an automatic Druckregutierung in the container. The gas phases of the container and storage tank are not in fluid communication, thereby precluding cross-contamination. A disadvantage of this method, however, is the high expenditure on equipment and the practical difficulty of adapting the pumping powers of the individual conveyor stages to the respective requirements.

In der WO 02 / 081963 A1 , welche als nächstliegender Stand der Technik angesehen wird, ist ein anderes Verfahren zue Befüllung eines Behälters mit Flüssiggas aus einem Vorratstank beschrieben, bei dem gleichfalls, zur Vermeidung einer Dekontamination des Vorratstanks, nur eine Zuleitung zur Verbindung der Flüssigphasen beider Behälter, jedoch keine Verbindung zwischen der Gasphase des zu betankenden Behälters und der des Vorratstank besteht. Ober die Flüssiggaszuleitung wird in bekannter Weise mittels einer geeigneten Pumpe Flüssiggas aus dem Vorratstank in den zu befüllenden Behälter gefördert. Um im Behälter einen Druckausgleich herbeizuführen, ist die Gasphase des Behälters mit einem Wärmetauscher verbunden, in dem das Gas abgekühlt und weitgehend verflüssigt wird. Das verflüssigte Gas wird anschließend einem Injektor, beispielsweise eine Venturidüse zugeführt, der, um eine durch Druckabfall verursachte Kavitation zu vermeiden, stromaufwärts zur Pumpe in der Flüssigzuleitung angeordnet ist. In der Venturidüse wird das aus dem Wärmetauscher strömende, verflüssigte Gas dem in der Flüssiggaszuleitung strömenden Flüssiggas beigemischt. Der Wärmetauscher ist nach der Lehre der WO/081963 bevorzugt im Innern des Vorratstanks angeordnet; die Abkühlung des dem zu befüllenden Behälter entnommenen Gases führt also gleichzeitig zur Verdampfung von Flüssiggas im Vorratstank und damit zu einer die Befüllung begünstigenden Druckerhöhung im Vorratstank.In the WO 02/081963 A1 , which is considered to be the closest prior art, another method for filling a container with liquefied gas from a storage tank is described, in which also, to avoid decontamination of the storage tank, only one supply line for connecting the liquid phases of both containers, but no connection between the gas phase of the container to be refueled and the storage tank consists. Above the liquid gas supply line is conveyed in a known manner by means of a suitable pump liquid gas from the storage tank into the container to be filled. In order to bring about a pressure equalization in the container, the gas phase of the container is connected to a heat exchanger, in which the gas is cooled and largely liquefied. The liquefied gas is then fed to an injector, for example a Venturi nozzle, which, in order to avoid cavitation caused by pressure drop, is arranged upstream of the pump in the liquid feed line. In the Venturi nozzle, the liquefied gas flowing out of the heat exchanger is admixed with the liquid gas flowing in the liquid gas feed line. The heat exchanger is according to the teaching of WO / 081963 preferably arranged in the interior of the storage tank; the cooling of the gas taken from the container to be filled thus simultaneously leads to the evaporation of liquid gas in the storage tank and thus to a pressure increase in the storage tank which promotes the filling.

Das in dieser Druckschrift beschriebene System verhindert wirksam eine Kreuzkohtamination beim Befüllvorgang. Unabhängig von den Anfangsbedingungen in den Behältern führt dieses System zu einem Fließgleichgewicht, bei dem der Druck im zu befüllenden Druckbehälter um ein Geringes größer ist als der Druck im Vorratsbehälter. Der Druckunterschied in beiden Behältern hängt Lediglich von der Kapazität des Wärmetauschers und der Menge des zugeführten Flüssiggases ab.The system described in this document effectively prevents Kreuzkohtamination during the filling process. Regardless of the initial conditions in the containers, this system results in a flow equilibrium in which the pressure in the pressure vessel to be filled is slightly greater than the pressure in the reservoir. The pressure difference in both tanks depends only on the capacity of the heat exchanger and the amount of liquid gas supplied.

Nachteilig bei diesem System ist jedoch, dass es in der Regel nicht gelingt, das über den Injektor eingeleitete Gas vollständig zu verflüssigen. Es verbleibt ein mehr oder weniger großer Teil gasförmiger Substanz, die die Effizienz der Befüllung erheblich mindert. Dadurch ist der Einsatz vergleichsweise starker und damit teurer und im Einsatz energieintensiverer Pumpen erforderlich. Insbesondere beim Einsatz in mobilen Befülleinrichtungen, beispielsweise Straßentankwagen, führt dies zu einem erheblich höheren Aufwand in der Ausführung der Fahrzeuge.A disadvantage of this system, however, is that it usually fails to completely liquefy the gas introduced via the injector. There remains a more or less large part of gaseous substance, which significantly reduces the efficiency of the filling. As a result, the use of relatively strong and therefore more expensive and in use energy-intensive pumps is required. In particular, when used in mobile filling devices, such as road tankers, this leads to a considerably higher cost in the execution of the vehicles.

Aufgabe der vorliegenden Erfindung ist es daher, eine Möglichkeit zur Befüllung eines Behälters mit Flüssiggas aus einem Vorratstank, anzugeben, die mit einem geringeren apparativen Aufwand auskommt und dennoch zuverlässig eine Kreuzkontamination zwischen Behälter und Vorratstank verhindert.Object of the present invention is therefore to provide a way to fill a container with liquid gas from a storage tank, specify that manages with less equipment and yet reliably prevents cross-contamination between the container and storage tank.

Gelöst ist dieser Aufgabe durch ein Verfahren mit den in Anspruch 1 genannten Merkmalen sowie durch eine Vorrichtung mit den in Anspruch 5 genannten Merkmalen.This object is achieved by a method with the features mentioned in claim 1 and by a device having the features mentioned in claim 5.

Gemäß der Erfindung wird mittels einer Fördereinrichtung Gas im flüssigen Zustand aus einem Vorratsbehälter dem zu befüllenden Behälter zugeführt und die im zu befüllenden Behälter vorliegende Gasphase komprimiert. Dem zu befüllenden Behälter wird Gas entnommen, das einem Wärmetauscher zugeführt und zumindest weitgehend verflüssigt wird. Das zumindest weitgehend verflüssigte Gas wird dem Flüssiggas aus dem Vorratsbehälter saugseitig zur Fördereinrichtung zugemischt und anschließend gemeinsam mit diesem in den Behälter gefördert. Zwar entsteht bei der Einleitung des zumindest teilweise verflüssigten Gases eine gewisse Kavitation im Saugbereich der Fördereinrichtung, jedoch ist bei modernen Flüssigkeitspumpen ein geringer Anteil von bis zu einigen Prozent Gas im geförderten Flüssigkeitsstrom ohne wesentliche Einschränkung der Leistung zu verkraften. Durch die Kompression in der Pumpe wird dieser Gasanteil stark reduziert. Mit der erfindungsgemäßen Verfahrensführung kann auf den Einsatz eines Injektors, einer Venturidüse oder sonstigen Einrichtungen, mittels der das wieder verflüssigte Gas in den Behälter bzw, die Flüssigzuleitung zum Behälter gefördert wird, verzichtet werden.According to the invention, by means of a conveyor gas is supplied in the liquid state from a reservoir to the container to be filled and compresses the gas phase present in the container to be filled. The container to be filled gas is removed, which is fed to a heat exchanger and at least largely liquefied. The at least largely liquefied gas is added to the liquid gas from the reservoir suction side to the conveyor and then conveyed together with this in the container. Although some cavitation occurs in the intake area of the conveyor during the introduction of the at least partially liquefied gas, with modern fluid pumps a small proportion of up to a few percent gas in the conveyed fluid flow can be absorbed without significant restriction of the power. By the compression in the Pump this gas content is greatly reduced. With the method according to the invention can be dispensed with the use of an injector, a venturi or other means by which the liquefied gas is conveyed into the container or, the liquid supply to the container.

Eine weiterführende Ausgestaltung der Erfindung sieht vor, dass der Differenzdruck zwischen dem Druck im Behälter und dem Druck des Vorratsbehälters direkt oder indirekt erfasst wird und das im Wärmetauscher verflüssigte Gas erst bei Vorliegen einer vorgegebenen, minimalen Differenzdrucks der Flüssigzuleitung zugeführt wird. Hierdurch wird die Entstehung von Kavitationen in der Flüssigzuleitung unterdrückt. Die genaue Höhe des minimalen Differenzdrucks hängt dabei von der Wahl der eingesetzten Ausrüstung ab, insbesondere von der Charakteristik des Wärmetauschers, die Förderleistung der Pumpe und der Fähigkeit der Pumpe, einen gewissen Gasanteil im geförderten Strom ohne erheblichen Abfall der Pumpleistung zu tolerieren. Der für die jeweilige Ausrüstung zu wählende minimale Differenzdruck kann beispielsweise vor der Inbetriebnahme oder der Auslieferung einer erfindungsgemäß arbeitenden Betankungseinheit empirisch bestimmt werden. Die Erfassung der Druckdifferenz erfolgt dabei zweckmäßigerweise kontinuierlich oder in regelmäßigen Zeitabständen. Die Erfassung der Druckdifferenz oder des Drucks kann in den Behältern selbst oder im Bereich der Zu- und Ableitungen oder an einer sonstigen Stelle erfolgen, sofern von der Messung eindeutig auf den Differenzdruck an der Sperrarmatur geschlossen werden kann.A further embodiment of the invention provides that the differential pressure between the pressure in the container and the pressure of the reservoir is detected directly or indirectly and the liquefied in the heat exchanger gas is supplied only in the presence of a predetermined, minimum differential pressure of the liquid feed line. As a result, the formation of cavitations in the liquid supply is suppressed. The exact level of the minimum differential pressure depends on the choice of equipment used, in particular on the characteristics of the heat exchanger, the capacity of the pump and the ability of the pump to tolerate a certain proportion of gas in the pumped stream without significant drop in pumping power. The minimum differential pressure to be selected for the respective equipment can be determined empirically, for example, before commissioning or delivery of a refueling unit operating according to the invention. The detection of the pressure difference is expediently carried out continuously or at regular time intervals. The detection of the pressure difference or of the pressure can take place in the containers themselves or in the region of the feed and discharge lines or at another point, provided that the measurement can clearly deduce the differential pressure at the blocking valve.

Eine bevorzugte Ausgestaltung der Erfindung, macht von der aus der WO 02/081963 A1 bekannten und bewährten Anordnung Gebrauch, den Wärmetauscher derart auszuführen, dass ein Wärmetausch zwischen dem zu verflüssigendem Gas und dem Flüssiggas im Vorratsbehälter erfolgt. Es kommt auf diese Weise also zu einem Transfer von Wärme vom Behälter zum Vorratstank. Die bei der Kondensation des Gases aus dem Behälter frei werdende Wärme wird dazu eingesetzt, Gas im Vorratsbehälter zu verdampfen und auf diese Weise den Gasdruck im Vorratsbehälter auch während der Entnahme des Flüssiggases zu erhalten.A preferred embodiment of the invention, makes from the of WO 02/081963 A1 known and proven arrangement use to perform the heat exchanger such that a heat exchange between the gas to be liquefied and the liquefied gas in the reservoir. So it comes in this way to a transfer of heat from the container to the storage tank. The heat released in the condensation of the gas from the container heat is used to vaporize gas in the reservoir and in this way to maintain the gas pressure in the reservoir during the removal of the liquefied gas.

Um die Effizienz des erfindungsgemäßen Verfahrens weiter zu erhöhen, sieht eine weitere vorteilhafte Ausgestaltung der Erfindung vor, das aus dem zu befüllenden Behälter entnommene Gas vor.seiner Zuführung an einen Wärmetauscher zu verdichten. Dies kann beispielsweise mittels eines in der Gasableitung angeordneten Kompressors, erfolgen.In order to further increase the efficiency of the method according to the invention, a further advantageous embodiment of the invention provides for the gas taken from the container to be filled to be supplied to a heat exchanger compacted. This can be done, for example, by means of a compressor arranged in the gas discharge.

Gelöst ist die der Erfindung zugrunde liegende Aufgabe auch durch eine Vorrichtung mit den in Anspruch 5 genannten Merkmalen.The problem underlying the invention is solved by a device having the features mentioned in claim 5.

Die erfindungsgemäße Vorrichtung umfasst also an den Vorratsbehälter angeschlossenen und mit dem Behälter verbindbaren Flüssigzuleitung, die ,mit einer Fördereinrichtung zum Fördern von Flüssiggas in den Behälter ausgerüstet ist, und mit einer mit dem Behälter verbindbaren Gasableitung, die einen Wärmetauscher durchläuft und an einer saugseitig zur Fördereinrichtung angeordneten Verbindungsstelle mit der Flüssigzuleitung in Strömungsverbindung steht. Die Fördereinrichtung transportiert Gas im flüssigen Zustand über die Flüssigzuleitung aus dem Vorratsbehälter in den zu befüllenden Behälter. Über die Gasableitung wird Gas dem Behälter entnommen und dem Wärmetauscher zugeführt. Im Wärmetauscher wird dem Gas Wärme entzogen und es dadurch zumindest teilweise verflüssigt. Das verflüssigte Gas wird in die Flüssigzuleitung eingespeist.The inventive device thus comprises connected to the reservoir and connectable to the container liquid supply line, which is equipped with a conveyor for conveying liquefied gas into the container, and with a connectable to the container gas discharge, which passes through a heat exchanger and on a suction side to the conveyor arranged connection point with the liquid supply is in flow communication. The conveyor transports gas in the liquid state via the liquid supply line from the storage container into the container to be filled. About the gas discharge gas is removed from the container and fed to the heat exchanger. In the heat exchanger, heat is withdrawn from the gas, thereby at least partially liquefying it. The liquefied gas is fed into the liquid feed line.

Der Wärmetauscher ist zweckmäßigerweise so ausgebildet, dass er einen thermischen Kontakt zwischen dem Gas, das dem Behälter entnommenen wurde und dem Gas, das im flüssigen und/oder gasförmigen Zustand im Vorratsbehälter vorliegt, herstellt, Es findet also ein Wärmeübergang von dem Gas im Vorratsbehälter auf das Gas aus dem zu befüllenden Behälter statt. Der Wärmetauscher kann beliebig im Umfeld des Vorratstanks angeordnet sein, ein besonders guter Wärmeübergang wird jedoch dann erzielt, wenn der Wärmetauscher innerhalb des Vorratsbehälters angeordnet ist.The heat exchanger is expediently designed such that it produces a thermal contact between the gas which has been taken from the container and the gas which is present in the liquid and / or gaseous state in the storage container. Thus, there is a heat transfer from the gas in the storage container the gas from the container to be filled instead. The heat exchanger can be arranged anywhere in the vicinity of the storage tank, a particularly good heat transfer is achieved, however, when the heat exchanger is disposed within the reservoir.

In einer Weiterbildung der Erfindung ist in der Gasableitung eine Kontrolleinrichtung vorgesehen, bestehend aus einer strömungstechnisch hinter dem Wärmetauscher angeordneten Sperrarmatur und einer Einrichtung zur Erfassung des Differenzdrucks vor und hinter dieser Sperrarmatur, die bei Erreichen einer vorgegebenen Druckbedingung die Sperrarmatur betätigt. Anstelle der Erfassung des Differenzdrucks an der Sperrarmatur kann auch die Druckdifferenz zwischen dem Vorratstank und dem zu befüllenden Tank erfasst und zur Ansteuerung der Sperrarmatur eingesetzt werden.In one embodiment of the invention, a control device is provided in the gas discharge, consisting of a fluidically behind the heat exchanger arranged blocking valve and means for detecting the differential pressure in front of and behind this blocking device, which actuates the blocking valve upon reaching a predetermined pressure condition. Instead of detecting the differential pressure at the blocking valve and the pressure difference between the storage tank and the tank to be filled can be detected and used to control the blocking valve.

Als Sperrarmatur kann dabei jede geeignete Armatur eingesetzt werden mittels der eine Druckdifferenz aufrechterhalten werden kann, also beispielsweise eine Drossel, eine Klappe oder ein Ventil. Besonders bevorzugt kommt jedoch ein kalibriertes oder kalibrierbares Ventil zum Einsatz, das bei einem fest vorgegebenen oder individuell einstellbaren Wert des Differenzdrucks öffnet oder shcließt.Any suitable fitting can be used as a blocking fitting by means of which a pressure difference can be maintained, that is, for example, a throttle, a flap or a valve. However, a calibrated or calibratable valve which opens or closes at a fixed or individually adjustable value of the differential pressure is particularly preferably used.

Um die Effizienz der erfindungsgemäßen Vorrichtung weiter zu erhöhen, sieht einer weiterführende Ausgestaltung der Erfindung vor, in der Gasableitung, vorzugsweise im Bereich zwischen dem zu befüllenden Behälter und dem Wärmetauscher, einen Kompressor anzuordnen.In order to further increase the efficiency of the device according to the invention, a further embodiment of the invention provides to arrange a compressor in the gas discharge, preferably in the region between the container to be filled and the heat exchanger.

Eine zweckmäßige Weiterbildung der Erfindung sieht vor, im Bereich zwischen dem Vorratstank und der Verbindungsstelle eine Einrichtung zum Verhindern des Rückflusses von Flüssiggas in den Vorratstank vorzusehen, beispielsweise ein Rückschlagventil. Insbesondere Störungen im Betriebablauf wird damit die Gefahr einer Kreuzkontamination vermieden.An expedient development of the invention provides to provide a means for preventing the backflow of liquefied gas into the storage tank in the area between the storage tank and the connection point, for example a check valve. In particular, disturbances in the operation so that the risk of cross-contamination is avoided.

Eine abermals vorteilhafte, Ausgestaltung der Erfindung sieht vor, als Fördereinrichtung eine mehrstufige Pumpe vorzusehen und die Verbindungsstelle in der Flüssigzuleitung zwischen zwei Pumpenstufen vorzusehen.A yet further advantageous embodiment of the invention provides to provide a multistage pump as a delivery device and to provide the connection point in the liquid feed line between two pump stages.

Eine zweckmäßige Ausgestaltung der Erfindung sieht vor, dass der Vorratstank und oder der Behälter in einer mobilen Versorgungseinheit angeordnet sein, wie beispielsweise einem Straßentankwagen oder einem Eisenbahn-Kesselwagen.An expedient embodiment of the invention provides that the storage tank and / or the container may be arranged in a mobile supply unit, such as a road tanker or a railroad tank car.

Anhand der Zeichnungen sollen Ausführungsbeispiele der Erfindung näher erläutert werden. In schematischen Ansichten zeigen:

  • Fig. 1: eine erfindungsgemäße Vorrichtung zum Befüllen eines Behälters, mit Flüssiggas in einer ersten Ausführungsform und
  • Fig. 2: eine erfindungsgemäße Vorrichtung zum Befüllen eines Behälters mit Flüssiggas in einer anderen Ausführungsform.
Reference to the drawings, embodiments of the invention will be explained in more detail. In schematic views show:
  • 1 shows an inventive device for filling a container, with LPG in a first embodiment and
  • 2 shows a device according to the invention for filling a container with liquid gas in another embodiment.

Fig. 1 zeigt einen Behälter 1, der für die Speicherung von Flüssiggas, beispielsweise Kohlendioxid, bestimmt ist. Im thermischen Gleichgewicht liegt das im Behälter 1 gespeicherte Flüssiggas sowohl In einer flüssigen Phase 2 als auch in einer Gasphase 3 vor. Der Behälter 1 ist des Weiteren in hier nicht interessierender und daher nicht gezeigter Weise mit Anschlüssen zur Versorgung von Verbrauchern mit Gas im flüssigen oder gasförmigen Zustand versehen. Für die Zwecke der Befüllung ist der Behälter 1 mit jeweils einer Flüssig-Anschlussleitung 4 sowie mit einer Gas-Rückführleitung 5 ausgerüstet.Fig. 1 shows a container 1, which is intended for the storage of liquefied petroleum gas, for example carbon dioxide. In thermal equilibrium, the liquid gas stored in the container 1 is present both in a liquid phase 2 and in a gas phase 3. The container 1 is further provided in this not interesting and therefore not shown manner with connections for supplying consumers with gas in the liquid or gaseous state. For the purpose of filling the container 1 is equipped with a respective liquid connection line 4 and with a gas return line 5.

Der Behälter 1 wird mit frischem Flüssiggas aus einem Vorratstank 6 versorgt. Per Vorratstank 6 ist Teil einer Betankungsanlage 10, die beispielsweise auf einer mobilen Tankeinheit, etwa einen Straßentankwagen oder einen Eisenbahn-Kesselwagen, aufmontiert ist. Bei der Betankungsanlage 10 kann es sich aber auch um eine ortsfeste, etwa in der Nähe einer Produktiönsstätte für das Flüssiggas aufgebaute Anlage handeln, die zur Befüllung eines mobilen, also auf einem Sträßentankwagen oder einem Eisenbahnkesselwagen montierten Behälters oder Betankungsanlage bestimmt ist; auch kann es sich beim Behälter 1 um einen Vorratsbehälter zur Flüssiggasversorgung weiterer Behälter oder Kundentanks handeln, der seinerseits Teil einer Betankungsanlage der hierbeschriebenen Art ist. Außer dem Vorratstank 6 weist die Betankungsanlage 10 die im Folgenden beschriebenen Einrichtungen auf. Zur Befüllung eines Behälters ist an dem Vorratstank 6 eine Flüssiggasleitung 7 angeordnet. Ebenso wie im Behälter 1 liegt auch im Vorratstank 6 das Flüssiggas in einer flüssigen Phase 8 und einer Gasphase 9 vor. Die Flüssiggasleitung 7 mündet in einem unteren Bereich in den Vorratstank 6 ein und stellt daher eine Strömungsverbindung mit der flüssigen Phase 8 des im Vorratstank 6 gespeicherten Flüssiggases her.The container 1 is supplied with fresh liquefied gas from a storage tank 6. By storage tank 6 is part of a refueling system 10, which is mounted, for example, on a mobile tank unit, such as a road tanker or a railroad tank car. However, the refueling system 10 can also be a fixed installation constructed approximately in the vicinity of a production facility for the liquefied gas, which is intended to fill a mobile container or refueling installation mounted on a road tanker or a railroad tank car; The container 1 can also be a storage container for supplying liquid gas to further containers or customer tanks, which in turn is part of a refueling system of the type described here. In addition to the storage tank 6, the refueling system 10 has the facilities described below. To fill a container, a liquefied gas line 7 is arranged on the storage tank 6. As in the container 1, the liquid gas is also present in the storage tank 6 in a liquid phase 8 and a gas phase 9. The liquefied gas line 7 opens into the storage tank 6 in a lower region and therefore establishes a flow connection with the liquid phase 8 of the liquefied gas stored in the storage tank 6.

Die Flüssiggasleitung 7 mündet an ihrem vom Vorratstank 7 abgewandten Ende in einem Anschlussstück 11 aus, mittels dessen eine lösbare Verbindung mit einem entsprechenden Anschlussstück 12 an der Flüssig-Anschlussleitung 4 herstellbar ist. In der Betankungseinheit 10 ist weiterhin eine Gasleitung 13 vorgesehen, die gleichfalls mit einem Anschlussstück 14 mit einem Anschlussstück 15 der Gas-Rückführleitung 5 verbindbar ist.The liquefied gas line 7 opens at its end facing away from the storage tank 7 end in a connecting piece 11, by means of which a releasable connection with a corresponding connection piece 12 on the liquid connection line 4 can be produced. In the fueling unit 10, a gas line 13 is further provided, which is also connectable to a connector 14 with a connector 15 of the gas return line 5.

In der Flüssiggasleitung 7 ist, stromabwärts vom Vorratsbehälter 6, eine Pumpe 16 angeordnet, die zur Förderung von Flüssiggas (im flüssigen Zustand) aus dem Vorratstank 6 in den Behälter 1 bestimmt ist. Zur Erfassung des Mengendurchflusses ist stromabwärts zur Pumpe 16 ein Durchflussmesser 20 vorgesehen.In the liquid gas line 7, downstream of the reservoir 6, a pump 16 is arranged, which is intended for the promotion of liquid gas (in the liquid state) from the storage tank 6 into the container 1. To detect the mass flow, a flow meter 20 is provided downstream of the pump 16.

Die Gasleitung 13 mündet auf ihrem dem Ahschluss 14 entgegen gesetzten Ende in einen Wärmetauscher 19 ein. Der Wärmetauscher 19 stellt einen thermischen Kontakt zwischen dem aus der Gasleitung 13 in den Wärmetauscher 19 einströmenden Gas und dem Flüssiggas im Innern des Vorratstanks 6 her und ist im Ausführungsbeispiel im Innern des Vorratstanks 6 angeordnet, und zwar derart, dass die Zuführung des Gases in den Wärmetauscher 19 von oben, also durch die Gasphase 9 hindurch erfolgt und die Wärmetauscheflächen einen guten thermischen Kontakt zur flüssigen Phase 8 besitzen. Aus dem Wärmetauscher 19 gelangt das nun gekühlte und zumindest teilweise verflüssigte Gas in eine Leitung 17, die an einer saugseitig zur Fördereinrichtung 16 angeordneten Verbindungsstelle 18 mit der Flüssigleitung 7 verbunden ist. Das aus der Leitung 17 einströmende Gas mischt sich in der Flüssiggasleitung 7 mit dem aus dem Vorratstank 6 entnommenen Flüssiggas und wird anschließend zusammen mit diesem der flüssigen Phase 2 des Gases im Behälter 1 zugeführt.The gas line 13 opens at its end opposite the connection 14 into a heat exchanger 19. The heat exchanger 19 establishes a thermal contact between the gas flowing from the gas line 13 into the heat exchanger 19 and the liquid gas inside the storage tank 6 and is arranged in the interior of the storage tank 6 in the exemplary embodiment, in such a way that the supply of the gas in the Heat exchanger 19 from above, that is through the gas phase 9 through and the heat exchange surfaces have a good thermal contact with the liquid phase 8. From the heat exchanger 19, the now cooled and at least partially liquefied gas passes into a conduit 17 which is connected to the liquid line 7 at a connection point 18 arranged on the suction side to the conveyor 16. The gas flowing in from the line 17 mixes in the liquefied gas line 7 with the liquid gas withdrawn from the storage tank 6 and is then fed together with the liquid phase 2 of the gas in the container 1.

Beim bestimmungsgemäßen Einsatz der Vorrichtung werden die Anschlussstücke 11 und 12 miteinander verbunden, um eine Strömungsverbindung zwischen dem Vorratstank 6 und dem zu befüllenden Behälter 1 herzustellen. Zugleich werden die Anschlussstücke 14 und 15 miteinander verbunden. Mittels der Pumpe 16 wird Flüssiggas im flüssigen Zustand in den Behälter 1 gepresst, wodurch sich der Druck im Behälter 1 erhöht. Gas strömt im gasförmigen Zustand aus der Gasphase 3 des im Behälter 1 vorliegenden Flüssiggases über die Gasleitungen 5 und 13 in den Wärmetauscher 19 ein. Durch den Wärmetausch mit der flüssigen Phase 8 des Flüssiggases im Vorratstank 6 wird das Gas soweit abgekühlt, dass es zumindest teilweise kondensiert und in der in der Leitung 17 im zumindest weitgehend flüssigen Zustand weitertransportiert wird. Die bei diesem Wärmetausch in den Vorratstank 6 eingetragene Wärme führt zur Verdampfung eines Teils der flüssigen Phase 8 und trägt dazu bei, den Druck im Innern des Vorratstanks 6 trotz der laufenden Entnahme von flüssigem Gas aufrecht erhalten oder gar zu erhöhen.When the device is used as intended, the connecting pieces 11 and 12 are connected to one another in order to establish a flow connection between the storage tank 6 and the container 1 to be filled. At the same time, the connecting pieces 14 and 15 are connected to each other. By means of the pump 16 liquid gas is pressed in the liquid state into the container 1, whereby the pressure in the container 1 increases. Gas flows in the gaseous state from the gas phase 3 of the liquid gas present in the container 1 via the gas lines 5 and 13 in the heat exchanger 19 a. Due to the heat exchange with the liquid phase 8 of the liquefied gas in the storage tank 6, the gas is cooled to the extent that it is at least partially condensed and transported in the at least substantially liquid state in the conduit 17. The introduced in this heat exchange in the storage tank 6 heat leads to the evaporation of a portion of the liquid phase 8 and helps to maintain the pressure in the interior of the storage tank 6 despite the ongoing removal of liquid gas upright or even increase.

Je höher die Pumpe 16 den Druck im Behälter 1 - und damit im Wärmetauscher 19 - steigert, desto zuverlässiger wird gewährleistet, dass das Flüssiggas im Bereich der Verbindungsstelle zumindest weitgehend in flüssiger Form vorliegt. Dennoch kann ein Teil des Gases im gasförmigen Zustand verbleiben. Beispielsweise führe die Entspannung des Gases beim Übergang aus der Leitung 17 in die Flüssigleitung 7 um 2 bar zu einer Kavitation von 5% des aus der Leitung 17 zugeführten Gases. Da der Anteil des verflüssigten Gases aus der Leitung 17 nur etwa 5% der insgesamt von der Pumpe16 geförderten Flüssiggasmenge beträgt, liegt nur insgesamt lediglich 0,25 % der von der Pumpe geförderten Gasmenge als Kavitation, also im gasförmigen Zustand vor. Eine solch niedrige Kavitation ist jedoch von der Mehrzahl der handelsüblichen Pumpen problemlos zu verkraften.The higher the pump 16, the pressure in the container 1 - and thus in the heat exchanger 19 - increases, the more reliable it is ensured that the liquid gas is present in the region of the junction at least largely in liquid form. Nevertheless, part of the gas may remain in the gaseous state. For example, lead the relaxation of the gas at the transition from the line 17 into the liquid line 7 by 2 bar to a cavitation of 5% of the gas supplied from the line 17. Since the proportion of the liquefied gas from the line 17 is only about 5% of the total amount of liquid pumped by the pump 16, only a total of only 0.25% of the amount of gas pumped by the pump is present as cavitation, ie in the gaseous state. However, such a low cavitation is easily absorbed by the majority of commercially available pumps.

Um beim Auftreten von Störungen im Betriebsablauf, beispielsweise bei einem plötzlichen Ausfall der Pumpe, einen Rückfluss von verflüssigtem Gas aus dem Wärmetauscher 19 in den Vorratstank 6 zu vermeiden, ist in der Flüssiggasleitung 7, strömungstechnisch zwischen Vorratstank 6 und Verbindungsstelle 18, eine Einrichtung zur Verhinderung des Rückflusses, beispielsweise ein Rückschlagventil 23, eingebaut. Die gleiche Funktion erfüllt der Einsatz einer mehrstufigen Pumpe, sofern die Verbindungsstelle 18 zwischen zwei Pumpenstufen angeordnet ist.In order to avoid the occurrence of disturbances in the operation, such as a sudden failure of the pump, a backflow of liquefied gas from the heat exchanger 19 in the storage tank 6, in the liquefied gas line 7, fluidically between storage tank 6 and junction 18, a device for preventing the reflux, for example, a check valve 23, installed. The same function is fulfilled by the use of a multi-stage pump, provided that the connection point 18 is arranged between two pump stages.

Zur Erhöhung der Effizienz der erfindungsgemäßen Vorrichtung ist es sinnvoll, jedoch nicht unbedingt notwendig, in der Gasleitung 13, stromaufwärts zum Wärmetauscher 19, einen Kompressor 22 vorzusehen, mittels dessen die Zufuhr von verflüssigtem Gas in die Flüssigzuleitung 7 unterstützt wird.To increase the efficiency of the device according to the invention, it is useful, but not essential, to provide in the gas line 13, upstream of the heat exchanger 19, a compressor 22, by means of which the supply of liquefied gas into the liquid supply line 7 is supported.

Die Ausführungsform nach Fig. 2 unterscheidet sich von der zuvor beschriebenen lediglich um eine zusätzliche Kontrolleinrichtung 21 in der Leitung 17, strömungstechnisch vor der Verbindungsstelle 18 angeordnet. Im Übrigen sind gleiche Bauteile mit gleichen Bezugsziffern wie in Fig. 1 versehen.The embodiment of FIG. 2 differs from the previously described only by an additional control device 21 in the line 17, fluidly arranged in front of the connection point 18. Incidentally, the same components with the same reference numerals as in Fig. 1 are provided.

Die Kontrolleinrichtung 21 umfasst eine Sperrarmatur, etwa ein Ventil, eine Klappe oder eine Drossel, mittels der der Durchfluss durch die Leitung 17 beeinflusstwerden kann. Zudem weist die Kontrolleinrichtung 21 eine Differenzdruckmesseinrichtung auf, mittels der die Druckdifferenz strömungstechnisch vor und hinter der Sperrarmatur bestimmt werden kann, und die auf die Sperrarmatur in Abhängigkeit von der Druckdifferenz einwirkt, also beispielsweise bei einem bestimmten Wert der Druckdifferenz die Sperrarmatur öffnet oder schließt. Die Kontrolleinrichtung 21 kann im einfachsten Falle: beispielsweise durch ein kalibriertes oder kalibrierbares Druckventil realisiert werden, das die Leitung 17 oberhalb einer bestimmten Druckdifferenz freigibt, darunter aber schließt. Die Erfassung der Druckdifferenz kann im übrigen auch durch Erfassung des Differenzdrucks-zwischen den Leitungen 7 und 13 oder den Behältern 1 und 6 erfolgen, oder aber indirekt, durch die Messung der jeweiligen absoluten Drücke und Berechnung der Differenz hieraus. Die Kontrolleinrichtung 21 gewährleistet, dass erst oberhalb einer bestimmten Druckdifferenz vor und hinter der Kontrolleinrichtung 21 eine Strömung des verflüssigten Gases aus der Leitung 17 in die Flüssiggasleitung 7 erfolgt; der Druck stromaufwärts zur Kontrolleinrichtung 21 ist dabei beispielsweise um 1,5 bis 2 bar größer als der Druck stromabwärts zur Kontrolleinrichtung 21. Kavitationen in der Flüssiggasleitung 7, durch die die Leistungsfähigkeit der Pumpe 16 herabgesetzt werden können, werden dadurch so weit reduziert, dass die Förderung des Flüssiggases durch die Pumpe 16 nicht beeinträchtigt wird. Die Kontrolleinrichtung kann auch auf einen niedrigeren Druckdifferenzwert eingestellt werden oder auch bei Überschreiten eines bestimmten Überdruckwertes die Leitung 17 schließen, um eine Kreuzkontamination in den Vorratsbehälter 6 zu verhindern. Der Wert für die minimale Druckdifferenz hängt von verschiedenen Größen der eingesetzten Ausrüstung ab, insbesondere von der Charakteristik des Wärmetauschers, der von der Pumpe zu bewältigenden Durchflussmenge und der Fähigkeit der Pumpe, einen gewissen Gasanteil im geförderten Strom ohne eine erhebliche Reduktion der Förderleistung zu tolerieren.The control device 21 comprises a blocking device, such as a valve, a flap or a throttle, by means of which the flow through the line 17 can be influenced. In addition, the control device 21 has a differential pressure measuring device, by means of which the pressure difference can be determined in terms of flow before and behind the blocking valve, and on the blocking valve in Dependent on the pressure difference acts, so for example at a certain value of the pressure difference, the blocking valve opens or closes. The control device 21 can be realized in the simplest case: for example, by a calibrated or calibratable pressure valve, which releases the line 17 above a certain pressure difference, but including it. Incidentally, the detection of the pressure difference can also take place by detecting the differential pressure between the lines 7 and 13 or the containers 1 and 6, or indirectly, by measuring the respective absolute pressures and calculating the difference thereof. The control device 21 ensures that only above a certain pressure difference before and after the control device 21, a flow of the liquefied gas from the line 17 into the liquefied gas line 7 takes place; The pressure upstream of the control device 21 is, for example, 1.5 to 2 bar greater than the pressure downstream of the control device 21 cavitations in the liquefied gas line 7, through which the performance of the pump 16 can be reduced, are thereby reduced so far that the Promotion of the liquefied gas is not affected by the pump 16. The control device can also be set to a lower pressure difference value or close the line 17 even if a certain overpressure value is exceeded in order to prevent cross contamination in the reservoir 6. The value for the minimum pressure difference depends on various sizes of equipment used, in particular the characteristics of the heat exchanger, the flow rate to be handled by the pump and the ability of the pump to tolerate some gas in the delivered stream without a significant reduction in flow rate.

Mit der erfindungsgemäßen Vorrichtung wird das dem Behälter 1 entnommene. Gas in einem Kreislauf in den Behälter 1 zurückgeführt. Somit kann der Behälter 1 befüllt werden, ohne dass die Gefahr einer Dekontamination des Flüssiggases im Vorratsbehälter 6 besteht. Die erfindungsgemäße Vorrichtung eignet sich zur Befüllung von Behältern mit beliebigen Flüssiggasen oder Gasgemischen.With the device according to the invention that is taken from the container 1. Gas in a circuit returned to the container 1. Thus, the container 1 can be filled without the risk of decontamination of the liquefied gas in the reservoir 6 is. The device according to the invention is suitable for filling containers with any liquid gases or gas mixtures.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1.1.
Behältercontainer
2.Second
flüssige Phase (im Behälter 1)liquid phase (in container 1)
3.Third
Gasphase (im Behälter 1)Gas phase (in container 1)
4.4th
Flüssig-AnschlussleitungLiquid supply cable
5.5th
Gas-RückführleitungGas recirculation line
6.6th
Vorratstankstorage tank
7.7th
FlüssiggasleitungLPG line
8.8th.
Flüssige Phase (im Vorratstank 6)Liquid phase (in storage tank 6)
9.9th
Gasphase (im Vorratstank 6)Gas phase (in storage tank 6)
10.10th
Betankungsanlagerefueling system
11.11th
Anschlussstück (an der-Flüssiggasleitung 7)Connection piece (on the liquid gas line 7)
1212
. Anschlusstück (an der Flüssig-Anschlussleitung 4), Connection piece (on the liquid connection line 4)
13.13th
Gasleitunggas pipe
14.14th
Anschlussstück (an der Gasleitung 13)Connecting piece (on the gas line 13)
15.15th
Anschlussstück (an derGas-Rückführleitung 5)Fitting (on the gas return line 5)
16.16th
Pumpepump
17.17th
Leitungmanagement
1818
. Verbindungsstelle, junction
19.19th
Wärmetauscherheat exchangers
20.20th
DurchflussmesserFlowmeter
21.21st
Kontrolleinrichtung.Control device.
22.22nd
Kompressorcompressor
23.23rd
Rückschlagventilcheck valve

Claims (13)

  1. Method for filling a container (1) with liquid gas from a storage tank (6), in which liquefied gas is removed from the storage tank (6) and is fed to the container (1) via a liquid feed line (7) by means of a delivery device (16), and the gas is compressed in the container (1) to be filled, gas (3) in the gaseous state is removed from the container (1) to be filled and is at least partially liquefied by cooling in a heat exchanger (19), and the at least partially liquefied gas is fed into the liquid feed line (7) at the suction end of the delivery device (16).
  2. Method according to Claim 1, characterized in that the differential pressure between the pressure in the container (1) and the pressure in the storage tank (6) is measured directly or indirectly and the gas which is liquefied in the heat exchanger is fed to the liquid feed line (7) only when a predefined, minimum differential pressure is present.
  3. Method according to one of the preceding claims, characterized in that the gas is liquefied in the heat exchanger (19) by exchanging heat with the liquid gas in the storage tank (6).
  4. Method according to one of the preceding claims, characterized in that the gas from the container (1) to be filled is compressed before being fed to the heat exchanger (19).
  5. Device for filling a container (1) with liquefied gas from a storage tank (6), having a liquid feed line (7) which is connected to the storage tank (6), can be connected to the container (1) and is equipped with a delivery device (16) for delivering liquid gas into the container (1), and having a gas discharge line (13, 17) which can be connected to the container (1), passes through a heat exchanger (19) and has a flow connection to the liquid feed line at a connecting point (18) arranged at the suction end of the delivery device.
  6. Device according to Claim 5, characterized in that the heat exchanger is embodied in such a way that it brings about thermal contact between gas removed from the container (1) and gas in the storage tank.
  7. Device according to Claim 6, characterized in that the heat exchanger (19) is arranged inside the storage tank (6).
  8. Device according to one of Claims 5 to 7,
    characterized by a control device (21) which comprises a shutoff fitting which is arranged in the gas discharge line (17) downstream of the heat exchanger (19), and a device for measuring the differential pressure upstream and downstream of the shutoff fitting.
  9. Device according to Claim 8, characterized in that a valve which is standardized or can be standardized and which opens the gas discharge line (17) when a predefined or adjustable differential pressure is reached is provided as the control device (21).
  10. Device according to one of Claims 5 to 9,
    characterized in that an apparatus for compressing the gas, for example a compressor (22), is arranged in the gas discharge line (13).
  11. Device according to one of Claims 5 to 10,
    characterized in that an apparatus (23) for preventing backflow of liquid gas into the storage tank (6) is provided in the liquid feed line (7) between the storage tank (6) and the connecting point (18).
  12. Device according to one of Claims 5 to 11,
    characterized in that a multistage pump is used as the delivery device (16), and the connecting point (18) is arranged in the liquid feed line (7) between two pump stages.
  13. Device according to one of Claims 5 to 12,
    characterized in that the storage tank (6) and/or the container (1) are arranged in a mobile supply unit, for example a tanker truck.
EP05776200A 2004-08-07 2005-07-19 Method and device for filling a container with liquid gas from a storage tank Active EP1776541B1 (en)

Applications Claiming Priority (2)

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DE102004038460A DE102004038460A1 (en) 2004-08-07 2004-08-07 Method and device for filling a container with liquid gas from a storage tank
PCT/EP2005/053485 WO2006015927A1 (en) 2004-08-07 2005-07-19 Method and device for filling a container with liquid gas from a storage tank

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EP1776541B1 true EP1776541B1 (en) 2008-01-16

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AT (1) ATE384224T1 (en)
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Also Published As

Publication number Publication date
WO2006015927A1 (en) 2006-02-16
EP1776541A1 (en) 2007-04-25
DE502005002586D1 (en) 2008-03-06
ATE384224T1 (en) 2008-02-15
US7617848B2 (en) 2009-11-17
US20080078188A1 (en) 2008-04-03
DE102004038460A1 (en) 2006-03-16

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