EP2275731B1 - Evacuation of liquefied petroleum gas bottles - Google Patents

Evacuation of liquefied petroleum gas bottles Download PDF

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Publication number
EP2275731B1
EP2275731B1 EP10290321.8A EP10290321A EP2275731B1 EP 2275731 B1 EP2275731 B1 EP 2275731B1 EP 10290321 A EP10290321 A EP 10290321A EP 2275731 B1 EP2275731 B1 EP 2275731B1
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EP
European Patent Office
Prior art keywords
bottle
bottles
liquefied petroleum
gas
station
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.)
Not-in-force
Application number
EP10290321.8A
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German (de)
French (fr)
Other versions
EP2275731A1 (en
Inventor
Daniel Bouvier
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Metallurgique Liotard Freres Ste
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Metallurgique Liotard Freres Ste
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Publication of EP2275731A1 publication Critical patent/EP2275731A1/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
    • F17C5/002—Automated filling apparatus
    • F17C5/005—Automated filling apparatus for gas bottles, such as on a continuous belt or on a merry-go-round
    • 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
    • F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/035—Propane butane, 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
    • 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
    • F17C2223/0107—Single phase
    • F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033—Small pressure, e.g. for liquefied gas
    • 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
    • F17C2223/04—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by other properties of handled fluid before transfer
    • F17C2223/042—Localisation of the removal point
    • F17C2223/046—Localisation of the removal point in the liquid
    • F17C2223/047—Localisation of the removal point in the liquid with a dip tube
    • 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
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0337—Heat exchange with the fluid by cooling
    • F17C2227/0341—Heat exchange with the fluid by cooling using another 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
    • F17C2227/0376—Localisation of heat exchange in or on a vessel in wall contact
    • F17C2227/0383—Localisation of heat exchange in or on a vessel in wall contact outside the vessel
    • 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
    • F17C2227/044—Methods for emptying or filling by purging
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/01—Improving mechanical properties or manufacturing
    • F17C2260/015—Facilitating maintenance
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/04—Reducing risks and environmental impact
    • F17C2260/044—Avoiding pollution or contamination
    • 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
    • F17C2270/05—Applications for industrial use
    • F17C2270/059—Mass bottling, e.g. merry belts
    • 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
    • F17C2270/07—Applications for household use
    • F17C2270/0745—Gas bottles

Definitions

  • the liquefied petroleum gas industry uses a large number of portable tanks for the distribution of these gases; during the life of these packages, it is necessary to remove the valve or the valve equipping them for operations such as periodic retest, dent removal, defective valve change.
  • the present invention is directed to a method and an installation for emptying liquefied petroleum gas cylinders, suppressing any emission of liquefied petroleum gas into the atmosphere by allowing recovery or reuse of the liquefied petroleum gas which has been removed bottles.
  • nitrogen and carbon dioxide can be used in particular.
  • the pressure of the inert gas is, in general, between 1.5 and 3 bar although higher pressures can be used.
  • the bottle of liquefied petroleum gas can be cooled to be emptied in any suitable manner.
  • a convenient way is to immerse in a bath of a liquid at low temperature and leave it there for a bottle with a capacity of 13 Kg for a period of between 5 and 10 min.
  • the bottle Once the bottle emptied of liquefied petroleum gas and filled with inert gas, it can either store it or make it undergo various operations before filling it again.
  • the withdrawn gas can be sent directly to the annealing furnace of the liquefied petroleum gas bottles with, in this case, preferably the interposition of an anti-flame device.
  • Liquefied petroleum gas can also be sent to a tank.
  • the invention is also directed to a system for emptying bottles of liquefied petroleum gas as defined by claim 3.
  • the conveyor is a roller conveyor, inclined by 1 to 5 degrees from the cooling station to the discharge station, so that the bottles in side-by-side contact go down along the inclined plane while remaining the time. necessary in the tank, the descent being carried out step by step because the bottle the most downstream is out of the tank.
  • the conveyor does not need drive means at a low temperature. But the conveyor can be as horizontal and pushes the bottles after the bottle downstream has been removed from the tank
  • magnets are placed in the conveyor or under the conveyor in the tank, to overcome the hydrostatic pressure and to keep the bottles on the conveyor.
  • the installation can be according to claim 5.
  • the installation comprises an insulated tank 1 comprising an inlet 2 of brine at -10 ° C. and an outlet 3 of this same fluid which, conveyed by a pump 4, passes into a refrigeration unit with heat exchange to return to the tank 1 through the inlet 2.
  • roller conveyor 4 inclined by 3 ° from the portion to the inlet 2 to the portion to the outlet 3.
  • bottles B butane gas at 20 ° C under a relative pressure of 2 bar.
  • the first bottle B at the entrance is placed at the top in the bath, it will move from right to left in the drawing until below a position 6 of unscrewing the tap of the bottle B, the travel time of the bottle on the conveyor 4 until it comes below the station 6 is 6 min.
  • the valve unscrewing station 6 the bottle B is sufficiently cooled so that the remaining butane gas is at a temperature of -8 ° C while being in liquid form at atmospheric pressure.
  • the valve of the bottle B is unscrewed at the position 6 of unscrewing.
  • the bottle B is open, butane does not come out, since it is in liquid form.
  • the bottle B then passes under a delivery station 7 comprising a device sealingly applied to the neck 8 of the bottle and having an orifice 9 communicating with a source 11 of nitrogen at a pressure of 1.5 bar and a rod 11 to the bottom 12 of the bottle and communicating with a use 13 of gas.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vacuum Packaging (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Description

L'industrie des gaz de pétrole liquéfiés utilise un grand nombre de réservoirs portatifs pour la distribution de ces gaz ; au cours de la vie de ces emballages, il est nécessaire de retirer le robinet ou la valve les équipant pour des opérations telles que réépreuve périodique, débosselage, changement de robinets défectueux.The liquefied petroleum gas industry uses a large number of portable tanks for the distribution of these gases; during the life of these packages, it is necessary to remove the valve or the valve equipping them for operations such as periodic retest, dent removal, defective valve change.

Au EP 1 813 855 on décrit une cuve remplie d'azote liquide et un convoyeur de bouteilles. Le document FR2750689 divulgue une installation conventionnelle dans laquelle du GPL est vidangé.At EP 1 813 855 a tank filled with liquid nitrogen and a bottle conveyor are described. The document FR2750689 discloses a conventional installation in which LPG is drained.

En règle générale, il est très difficile de vider complètement les réservoirs, car, d'une part, la vaporisation des gaz liquéfiés se fait lentement et, d'autre part, il subsiste toujours des produits lourds qui continuent à dégazer, ce qui occasionne le rejet dans l'atmosphère de composés organiques volatils interdits par la réglementation et des dangers d'explosion. On a proposé des dispositifs faisant appel au "tirage au vide", mais ces derniers sont complexes et coûteux et peu adaptés à des cadences industrielles.As a general rule, it is very difficult to completely empty the tanks, because, on the one hand, the vaporization of liquefied gases is slow and, on the other hand, there are still heavy products that continue to degass, which causes the release into the atmosphere of volatile organic compounds prohibited by regulation and explosion hazards. Vacuum drawing devices have been proposed, but these are complex and expensive and poorly adapted to industrial rates.

La présente invention vise un procédé et une installation de vidange de bouteilles de gaz de pétrole liquéfié, supprimant toute émission de gaz de pétrole liquéfié dans l'atmosphère en permettant de récupérer ou de réutiliser le gaz de pétrole liquéfié que l'on a fait sortir des bouteilles.The present invention is directed to a method and an installation for emptying liquefied petroleum gas cylinders, suppressing any emission of liquefied petroleum gas into the atmosphere by allowing recovery or reuse of the liquefied petroleum gas which has been removed bottles.

Le procédé suivant l'invention est caractérisé en ce que :

  • on refroidit la bouteille de pétrole liquéfié entre -5 et -10°C, lorsqu'elle contient du butane, et entre -50 et -55°C, lorsqu'elle contient du propane, dans une cuve remplie d'un liquide refroidi
  • on enlève le robinet de la bouteille refroidie,
  • on adapte au col de la bouteille un dispositif étanche ayant un orifice d'injection de gaz inerte et une canne débouchant au bas de la bouteille de refoulement de gaz de pétrole liquéfié à l'extérieur,
  • on injecte du gaz inerte sous pression en refoulant le gaz de pétrole liquéfié à l'extérieur par la canne,
  • on retire le dispositif d'étanchéité de la bouteille.
The process according to the invention is characterized in that:
  • the liquefied petroleum bottle is cooled to between -5 and -10 ° C, when it contains butane, and between -50 and -55 ° C, when it contains propane, in a tank filled with a cooled liquid
  • the tap of the cooled bottle is removed,
  • a sealed device is fitted to the neck of the bottle having an inert gas injection orifice and a rod opening at the bottom of the liquefied petroleum gas delivery bottle to the outside,
  • pressurized inert gas is injected by pushing the liquefied petroleum gas out of the cane,
  • the sealing device is removed from the bottle.

Comme gaz inerte sous pression, on peut utiliser notamment l'azote et le dioxyde de carbone. La pression du gaz inerte est, en général, comprise entre 1,5 et 3 bars bien que l'on puisse utiliser des pressions supérieures.As inert gas under pressure, nitrogen and carbon dioxide can be used in particular. The pressure of the inert gas is, in general, between 1.5 and 3 bar although higher pressures can be used.

On peut refroidir la bouteille de gaz de pétrole liquéfié à vider de toute façon appropriée. Une façon commode consiste à la plonger dans un bain d'un liquide à basse température et à l'y laisser pour une bouteille d'une capacité de 13 Kg pendant une durée comprise entre 5 et 10 min.The bottle of liquefied petroleum gas can be cooled to be emptied in any suitable manner. A convenient way is to immerse in a bath of a liquid at low temperature and leave it there for a bottle with a capacity of 13 Kg for a period of between 5 and 10 min.

Une fois la bouteille vidée du gaz de pétrole liquéfié et emplie du gaz inerte, on peut soit la stocker, soit lui faire subir diverses opérations avant de la remplir à nouveau.Once the bottle emptied of liquefied petroleum gas and filled with inert gas, it can either store it or make it undergo various operations before filling it again.

Le gaz prélevé peut être envoyé directement au four de recuit des bouteilles de gaz de pétrole liquéfié avec dans ce cas, de préférence, interposition d'un dispositif anti-flammes. On peut aussi envoyer le gaz de pétrole liquéfié dans un réservoir.The withdrawn gas can be sent directly to the annealing furnace of the liquefied petroleum gas bottles with, in this case, preferably the interposition of an anti-flame device. Liquefied petroleum gas can also be sent to a tank.

L'invention vise aussi une installation de vidange de bouteilles de gaz de pétrole liquéfié ainsi que définie par la revendication 3.The invention is also directed to a system for emptying bottles of liquefied petroleum gas as defined by claim 3.

De préférence, le convoyeur est un convoyeur à rouleaux, incliné de 1 à 5 degrés du poste de refroidissement au poste de refoulement, de sorte que les bouteilles en contact côte à côte descendent d'elles même le long du plan incliné en restant le temps nécessaire dans la cuve, la descente s'effectuant pas à pas parce que la bouteille la plus en aval est sortie de la cuve. Le convoyeur n'a pas besoin de moyens d'entraînement se trouvant à basse température. Mais le convoyeur peut être aussi horizontal et on y pousse les bouteilles après que la bouteille la plus en aval a été retirée de la cuvePreferably, the conveyor is a roller conveyor, inclined by 1 to 5 degrees from the cooling station to the discharge station, so that the bottles in side-by-side contact go down along the inclined plane while remaining the time. necessary in the tank, the descent being carried out step by step because the bottle the most downstream is out of the tank. The conveyor does not need drive means at a low temperature. But the conveyor can be as horizontal and pushes the bottles after the bottle downstream has been removed from the tank

Suivant un mode de réalisation, on dispose des aimants dans le convoyeur ou sous le convoyeur dans la cuve, pour vaincre la pression hydrostatique et bien maintenir les bouteilles sur le convoyeur.According to one embodiment, magnets are placed in the conveyor or under the conveyor in the tank, to overcome the hydrostatic pressure and to keep the bottles on the conveyor.

L'installation peut être suivant la revendication 5.The installation can be according to claim 5.

La figure unique du dessin annexé illustre schématiquement une installation suivant l'invention.The single figure of the accompanying drawing schematically illustrates an installation according to the invention.

L'installation comprend une cuve 1 calorifugée comprenant une entrée 2 d'eau glycolée à -10°C et une sortie 3 de ce même fluide qui, véhiculé par une pompe 4, passe dans un groupe 5 frigorifique avec échange de chaleur pour revenir à la cuve 1 par l'entrée 2.The installation comprises an insulated tank 1 comprising an inlet 2 of brine at -10 ° C. and an outlet 3 of this same fluid which, conveyed by a pump 4, passes into a refrigeration unit with heat exchange to return to the tank 1 through the inlet 2.

Au fond de la cuve 1 emplie d'eau glycolée est monté un convoyeur 4 à rouleaux incliné de 3° de la partie se trouvant vers l'entrée 2 à la partie se trouvant vers la sortie 3.At the bottom of the tank 1 filled with brine is mounted a roller conveyor 4 inclined by 3 ° from the portion to the inlet 2 to the portion to the outlet 3.

Sur ce convoyeur 4, sont placées côte à côte et se touchant, bien que cela ne soit pas représenté au dessin par souci de clarté, des bouteilles B de gaz de butane à 20°C sous une pression relative de 2 bars. La première bouteille B à l'entrée est mise par le haut dans le bain, elle va se déplacer de droite à gauche au dessin jusqu'en dessous d'un poste 6 de dévissage du robinet de la bouteille B, la durée de trajet de la bouteille sur le convoyeur 4 jusqu'à ce qu'elle vienne en dessous du poste 6 est de 6 min. Lorsqu'elle arrive au poste 6 de dévissage du robinet, la bouteille B est suffisamment refroidie pour que le gaz butane qui y reste se trouve à une température de -8°C en étant sous forme liquide à la pression atmosphérique. Le robinet de la bouteille B est dévissé au poste 6 de dévissage. Bien que la bouteille B soit ouverte, du butane n'en sort pas, puisqu'il est sous forme liquide.On this conveyor 4 are placed side by side and touching, although not shown in the drawing for the sake of clarity, bottles B butane gas at 20 ° C under a relative pressure of 2 bar. The first bottle B at the entrance is placed at the top in the bath, it will move from right to left in the drawing until below a position 6 of unscrewing the tap of the bottle B, the travel time of the bottle on the conveyor 4 until it comes below the station 6 is 6 min. When it reaches the valve unscrewing station 6, the bottle B is sufficiently cooled so that the remaining butane gas is at a temperature of -8 ° C while being in liquid form at atmospheric pressure. The valve of the bottle B is unscrewed at the position 6 of unscrewing. Although the bottle B is open, butane does not come out, since it is in liquid form.

La bouteille B passe ensuite sous un poste 7 de refoulement comprenant un dispositif appliqué de manière étanche au col 8 de la bouteille et ayant un orifice 9 communiquant avec une source 11 d'azote sous une pression de 1,5 bar et une canne 11 allant jusqu'au fond 12 de la bouteille et communiquant avec une utilisation 13 de gaz.The bottle B then passes under a delivery station 7 comprising a device sealingly applied to the neck 8 of the bottle and having an orifice 9 communicating with a source 11 of nitrogen at a pressure of 1.5 bar and a rod 11 to the bottom 12 of the bottle and communicating with a use 13 of gas.

Lorsque la bouteille B arrive contre la paroi de la cuve où se trouve la sortie 3, on la retire.When the bottle B arrives against the wall of the tank where the outlet 3 is located, it is removed.

Claims (4)

  1. A process for evacuating bottles of liquefied petroleum gas, characterised in that:
    - the bottle of liquefied petroleum is cooled in a bath filled with a cooled liquid to between -5 and -10°C, when it contains butane, and to between -50 and -55°C when it contains propane,
    - the valve is removed from the cooled bottle, a sealed device with an orifice for the injection of an inert gas is attached to the neck of the bottle and a glass tube discharging at the bottom of the bottle to expel the liquefied petroleum gas to the outside through the glass tube,
    - an inert gas is injected under pressure which expels the liquefied petroleum gas to the outside,
    - the sealed device is removed from the bottle.
  2. A process according to claim 1, characterised in that the inert gas is nitrogen or carbon dioxide.
  3. A plant for the evacuation of bottles (B) of liquefied petroleum gas characterised in that it comprises:
    - a bath (1) filled with a liquid with a freezing point below -20°C when the gas bottles contain butane, and below -65°C when they contain propane,
    - a system (2 to 5) for cooling the liquid in the bath (1) to a temperature of -5 to - 10°C when the bottles contain butane and to a temperature of -55°C when they contain propane,
    - a conveyor (4) for the bottles in the bath (1) causing the bottles (B) to pass successively to a cooling station (6) for sufficient time for the gas contained in the bottles (B) to reach the stated temperature, to a station (6) for unscrewing the valve and to a station (7) for expelling the gas contained in the bottle (B) to the outside with inert gas, the plant having a sealed device with an orifice for injecting the inert gas and a glass tube discharging at the bottom of the bottle at the evacuation station.
  4. A plant according to claim 3, characterised in that the conveyor is the Inclined roller type from the cooling station to the discharge station and the bottles are in contact with the conveyor.
EP10290321.8A 2009-07-17 2010-06-11 Evacuation of liquefied petroleum gas bottles Not-in-force EP2275731B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0903523A FR2948168B1 (en) 2009-07-17 2009-07-17 DRAINING LIQUEFIED PETROLEUM GAS BOTTLES

Publications (2)

Publication Number Publication Date
EP2275731A1 EP2275731A1 (en) 2011-01-19
EP2275731B1 true EP2275731B1 (en) 2018-11-07

Family

ID=41605521

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10290321.8A Not-in-force EP2275731B1 (en) 2009-07-17 2010-06-11 Evacuation of liquefied petroleum gas bottles

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EP (1) EP2275731B1 (en)
FR (1) FR2948168B1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2475517A1 (en) * 1980-02-07 1981-08-14 Elf Antargaz PROCESS FOR FILLING BOTTLES OF LIQUEFIED GASES
FR2750689B1 (en) * 1996-07-05 1998-11-06 Provencale D Automation Et De SIMPLIFICATION TO LPG FILLING PLANTS
EP1813855A1 (en) * 2006-01-27 2007-08-01 L'AIR LIQUIDE, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Process and arrangement for filling a high pressure gas container with liquefied gas under hydrostatic pressure
FI122608B (en) * 2007-11-12 2012-04-13 Waertsilae Finland Oy Procedure for operating a LNG-powered watercraft and a drive system for an LNG-powered watercraft

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
FR2948168A1 (en) 2011-01-21
EP2275731A1 (en) 2011-01-19
FR2948168B1 (en) 2015-02-27

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