EP0159234A1 - Process and installation for the treatment of a storage site - Google Patents

Process and installation for the treatment of a storage site Download PDF

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Publication number
EP0159234A1
EP0159234A1 EP19850400512 EP85400512A EP0159234A1 EP 0159234 A1 EP0159234 A1 EP 0159234A1 EP 19850400512 EP19850400512 EP 19850400512 EP 85400512 A EP85400512 A EP 85400512A EP 0159234 A1 EP0159234 A1 EP 0159234A1
Authority
EP
European Patent Office
Prior art keywords
gas
site
passages
tank
nitrogen
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.)
Granted
Application number
EP19850400512
Other languages
German (de)
French (fr)
Other versions
EP0159234B1 (en
Inventor
Michel Bonneton
Bernard Marchal
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Priority to AT85400512T priority Critical patent/ATE27792T1/en
Publication of EP0159234A1 publication Critical patent/EP0159234A1/en
Application granted granted Critical
Publication of EP0159234B1 publication Critical patent/EP0159234B1/en
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B57/00—Tank or cargo hold cleaning specially adapted for vessels
    • B63B57/04—Tank or cargo hold cleaning specially adapted for vessels by ventilating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/22—Safety features
    • B65D90/30—Recovery of escaped vapours
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/22—Safety features
    • B65D90/38—Means for reducing the vapour space or for reducing the formation of vapour within containers
    • B65D90/44—Means for reducing the vapour space or for reducing the formation of vapour within containers by use of inert gas for filling space above liquid or between contents
    • 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
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0022—Hydrocarbons, e.g. natural gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0022—Hydrocarbons, e.g. natural gas
    • F25J1/0025—Boil-off gases "BOG" from storages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0221—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using the cold stored in an external cryogenic component in an open refrigeration loop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0244—Operation; Control and regulation; Instrumentation
    • F25J1/0245—Different modes, i.e. 'runs', of operation; Process control
    • F25J1/0248—Stopping of the process, e.g. defrosting or deriming, maintenance; Back-up mode or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
    • F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
    • F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
    • F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
    • F25J1/0275—Construction and layout of liquefaction equipments, e.g. valves, machines adapted for special use of the liquefaction unit, e.g. portable or transportable devices
    • F25J1/0277—Offshore use, e.g. during shipping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0119—Shape cylindrical with flat end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/014—Nitrogen
    • 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
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • 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
    • F17C2223/0146—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
    • F17C2223/01—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
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • 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
    • F17C2227/04—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
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/42—Nitrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/08—Cold compressor, i.e. suction of the gas at cryogenic temperature and generally without afterstage-cooler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/60—Processes or apparatus involving steps for increasing the pressure of gaseous process streams the fluid being hydrocarbons or a mixture of hydrocarbons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/62—Details of storing a fluid in a tank

Definitions

  • the present invention relates to a method and an installation for treating a storage site, in particular for purging and inerting tanks. It applies in particular to the purging and inerting of tanks of vessels carrying liquefied natural gas (LNG) or liquefied petroleum gas (LPG). However, it can also be applied to the purging and inerting of other types of tanks containing volatile flammable, polluting and / or expensive products.
  • LNG liquefied natural gas
  • LPG liquefied petroleum gas
  • this purging operation which is often called “deballasting" takes place in two stages: bringing the tanks to room temperature, at sea, then, at the quay, injecting a neutral gas such as nitrogen.
  • a neutral gas such as nitrogen.
  • the combustible gas expelled from the tanks under the pressure of nitrogen, consisting of light hydrocarbons, is sent to the flare.
  • fuel gas is also injected into the mixture leaving the tanks so as to obtain a stable combustible mixture at the flare until the deballasting is completely stopped.
  • the object of the invention is to provide a method and an installation making it possible to economically recover most of the gaseous products expelled from the storage site during the purging.
  • a process for treating a storage site in particular for purging and inerting a reservoir, of the type in which a gaseous product contained in said site is expelled by injecting nitrogen therein, characterized in that an indirect heat exchange is carried out between the gas leaving said site and liquid nitrogen, so as to partially condense this gas, and in that it is injected into said site nitrogen gas resulting from this vaporization of liquid nitrogen.
  • the invention also relates to an installation for treating a storage site, in particular for purging and inerting of tanks, intended for the implementation of such a process.
  • This installation includes: a phase separator; a storage container communicating with the phase separator; and an indirect heat exchanger comprising first passages intended to be connected upstream to said site and connected downstream to the separator, and second passages connected upstream to a source of liquid nitrogen and intended to be connected downstream to said site.
  • FIGS. 1 to 4 schematically illustrate four alternative embodiments of the method according to the invention.
  • an installation intended to purge for inerting a tank 1 which is for example a tank of LNG or LPG transport ship.
  • the installation comprises an indirect heat exchanger 2 against the current, a phase separator 3 and a container 4 for storing the recovered liquid products.
  • the exchanger 2 comprises first passages 5 connected upstream to the tank 1 and downstream to the separator 3, and second passages 6 connected upstream to a source of liquid nitrogen and downstream to the tank 1 by l intermediate of a pipe 7.
  • a pipe 8 is provided on the pipe 7 provided with a valve 9 controlled by the pressure prevailing in the pipe 7.
  • a pipe 10 for supplying auxiliary nitrogen gas provided with a valve 11 and supplied by an external nitrogen source opens into the same pipe 7 downstream of the vent 8.
  • the base of the separator 3 is connected to that of the container 4 by a line 12, and the top of the separator is equipped with a vent 13 provided with a pressure limiter not shown.
  • a pipe 14 provided with a valve 15 makes it possible to bring nitrogen gas into the upper part of the container 4 from an external nitrogen source.
  • liquid nitrogen is vaporized in the exchanger 2 against the flow of the gas leaving the reservoir 1. This gas is thus partially condensed, and the liquid obtained is collected in the separator 3 and transferred to the container 4 by driving 12.
  • the nitrogen gas vaporized in the exchanger 2 is sent via line 7 to the tank 1, opposite the gas outlet orifice of this tank, and pushes the gas content of the tank towards the passages 5 of the exchanger 2.
  • nitrogen is used a first time for its cooling capacity, then a second time for its mechanical energy and for its inerting properties.
  • a compressor 16 can be mounted between the outlet of the tank 1 and the inlet of the passages 5.
  • the gas formed in the separator 3 can then be reinjected into the passages 6 of the exchanger 2 which convey the liquid nitrogen by a line 17, which is provided with a valve 18 controlled by the pressure of the separator.
  • a valve 18 controlled by the pressure of the separator.
  • Such reinjection assumes, however, that the content of the gas in the separator in product to be recovered is sufficiently low, so that it occurs only at an already advanced stage of the purging operation, in a phase where, precisely, the Nitrogen flow required for condensation is no longer sufficient to ensure effective purging.
  • Vent 13 is equipped with an 18A control valve.
  • FIG. 2 assumes that there is a compressor 16 of the cryogenic type. According to the variant of FIG. 3, it may be more advantageous to use an ordinary compressor, less expensive, and an auxiliary exchanger 19 ensuring an indirect heat exchange against the current between the gas entering the compressor and the gas which comes out. Apart from this difference, the arrangement of FIG. 3 is identical to that of FIG. 2.
  • Figure 4 illustrates a variant of the diagram of Figure 1 which allows to push to a high degree the recovery without increasing the pressure of the gas leaving the tank, and therefore without using a compressor and a heat exchanger adapted to withstand high pressures.
  • it is necessary to lower the temperature in the exchanger 2, which leads to the presence of a sub-cooled liquid in the separator 3.
  • We therefore heat this liquid in line 12 by causing it to yield frigories with the gas leaving the tank 1 before the latter enters the passages 5 of the main exchanger 2.
  • the auxiliary heat exchanger 20 provides a countercurrent heat exchange between the supply line outlet of the reservoir and the pipe 12, and the treated gas is precooled before exchanging heat with the liquid nitrogen. It is understood that this variant improves the thermal balance of the insatllation.
  • FIG. 4 also shows a bypass 21 connecting the sections of the tank outlet pipe located before and after the exchanger 20.
  • This bypass is equipped with a valve 22 controlled by the temperature prevailing in the line 12 downstream of the exchanger 20.
  • the gas flow which effectively passes through this exchanger is controlled by the quantity of heat which is exchanged.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Ocean & Marine Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
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Abstract

The tank (1) is purged by gaseous nitrogen resulting from the vaporization of liquid nitrogen which has undergone an indirect heat exchange (2) with the gas issuing from the tank. This enables the purged products to be recovered. Application in the deballasting of ships transporting liquified petroleum gas or natural gas.

Description

La présente invention est relative à un procédé et une installation de traitement d'un site de stockage, notamment de purge et d'inertage de réservoir. Elle s'applique en particulier à la purge et à l'inertage des citernes des navires de transport de gaz naturel liquéfié (GNL) ou de gaz de pétrole liquéfié (GPL). Cependant, elle peut également s'appliquer à la purge et à l'inertage d'autres types de réservoirs contenant des produits volatils inflammables, polluants et/ou coûteux.The present invention relates to a method and an installation for treating a storage site, in particular for purging and inerting tanks. It applies in particular to the purging and inerting of tanks of vessels carrying liquefied natural gas (LNG) or liquefied petroleum gas (LPG). However, it can also be applied to the purging and inerting of other types of tanks containing volatile flammable, polluting and / or expensive products.

On sait que de nombreux réservoirs contenant des produits volatils doivent périodiquement être purgés, et qu'il est alors nécessaire de les inerter pour des raisons de sécurité. C'est le cas notamment des cuves ou citernes des navires de transport de GNL ou de GPL après la livraison de la cargaison.It is known that many tanks containing volatile products must be periodically drained, and that it is then necessary to inert them for safety reasons. This is particularly the case for the tanks or tanks of LNG or LPG transport vessels after the delivery of the cargo.

Dans la technique classique, cette opération de purge, que l'on appelle souvent "déballastage", s'effectue en deux temps : mise à température ambiante des citernes, en mer, puis, à quai, injection d'un gaz neutre tel que l'azote. Pendant cette dernière opération, le gaz combustible expulsé des citernes sous la poussée de l'azote, constitué d'hydrocarbures légers, est envoyé à la torchère. En fin d'opération de déballastage, on procède en outre à une injection de gaz combustible dans le mélange sortant des citernes de façon à obtenir à la torchère un mélange combustible stable jusqu'à l'arrêt complet du déballastage.In the conventional technique, this purging operation, which is often called "deballasting", takes place in two stages: bringing the tanks to room temperature, at sea, then, at the quay, injecting a neutral gas such as nitrogen. During this last operation, the combustible gas expelled from the tanks under the pressure of nitrogen, consisting of light hydrocarbons, is sent to the flare. At the end of the deballasting operation, fuel gas is also injected into the mixture leaving the tanks so as to obtain a stable combustible mixture at the flare until the deballasting is completely stopped.

Cette technique, actuellement très généralisée, n'est pas satisfaisante car elle conduit d'une part à des pertes de temps et d'argent (circulation inutile de navires), d'autre part à des pertes de combustible évaluées entre 2 % et 5 % de la cargaison selon la pression de stockage des gaz liquéfiés. Des inconvénients analogues se présentent dans les autres cas évoqués plus haut.This technique, currently very generalized, is not satisfactory because it leads on the one hand to loss of time and money (unnecessary traffic of ships), on the other hand to fuel losses evaluated between 2% and 5 % of the cargo according to the storage pressure of the liquefied gases. Similar disadvantages arise in the other cases mentioned above.

L'invention a pour but de fournir un procédé et une installation permettant de façon économique de récupérer l'essentiel des produits gazeux expulsés du site de stockage pendant la purge.The object of the invention is to provide a method and an installation making it possible to economically recover most of the gaseous products expelled from the storage site during the purging.

A cet effet, elle a pour objet un procédé de traitement d'un site de stockage, notamment de purge et d'inertage de réservoir, du type dans lequel on expulse un produit gazeux contenu dans ledit site en y injectant de l'azote, caractérisé en ce qu'on effectue un échange de chaleur indirect entre le gaz sortant dudit site et de l'azote liquide, de manière à condenser partiellement ce gaz, et en ce qu'on injecte dans ledit site l'azote gazeux résultant de cette vaporisation d'azote liquide.To this end, it relates to a process for treating a storage site, in particular for purging and inerting a reservoir, of the type in which a gaseous product contained in said site is expelled by injecting nitrogen therein, characterized in that an indirect heat exchange is carried out between the gas leaving said site and liquid nitrogen, so as to partially condense this gas, and in that it is injected into said site nitrogen gas resulting from this vaporization of liquid nitrogen.

L'invention a également pour objet une installation de traitement d'un site de stockage, notamment de purge et d'inertage de réservoir, destinée à la mise en oeuvre d'un tel procédé. Cette installation comprend: un séparateur de phases ; un récipient de stockage communiquant avec le séparateur de phases; et un échangeur de chaleur indirect comportant des premiers passages destinés à être reliés en amont audit site et reliés en aval au séparateur, et des deuxièmes passages reliés en amont à une source d'azote liquide et destinés à être reliés en aval audit site.The invention also relates to an installation for treating a storage site, in particular for purging and inerting of tanks, intended for the implementation of such a process. This installation includes: a phase separator; a storage container communicating with the phase separator; and an indirect heat exchanger comprising first passages intended to be connected upstream to said site and connected downstream to the separator, and second passages connected upstream to a source of liquid nitrogen and intended to be connected downstream to said site.

Quelques exemples de réalisation de l'invention vont maintenant être décrits en regard des dessins annexés, sur lesquels les figures 1 à 4 illustrent schématiquement quatre variantes de mise en oeuvre du procédé suivant l'invention.Some exemplary embodiments of the invention will now be described with reference to the accompanying drawings, in which FIGS. 1 to 4 schematically illustrate four alternative embodiments of the method according to the invention.

Dans tous les modes de réalisation représentés, on voit une installation destinée à purger en vue de son inertage un réservoir 1 qui est par exemple une cuve de navire de transport de GNL ou de GPL. L'installation comprend un échangeur de chaleur indirect 2 à contre-courant, un séparateur de phases 3 et un récipient 4 de stockage des produits liquides récupérés.In all the embodiments shown, there is an installation intended to purge for inerting a tank 1 which is for example a tank of LNG or LPG transport ship. The installation comprises an indirect heat exchanger 2 against the current, a phase separator 3 and a container 4 for storing the recovered liquid products.

A la figure 1, l'échangeur 2 comprend des premiers passages 5 reliés en amont au réservoir 1 et en aval au séparateur 3, et des deuxièmes passages 6 reliés en amont à une source d'azote liquide et en aval au réservoir 1 par l'intermédiaire d'une conduite 7. Sur la conduite 7 est piquée une conduite d'évent 8 pourvue d'une vanne 9 pilotée par la pression régnant dans la conduite 7. Une conduite 10 d'amenée d'azote gazeux auxiliaire pourvue d'une vanne 11 et alimentée par une source d'azote extérieure débouche dans la même conduite 7 en aval de l'évent 8.In FIG. 1, the exchanger 2 comprises first passages 5 connected upstream to the tank 1 and downstream to the separator 3, and second passages 6 connected upstream to a source of liquid nitrogen and downstream to the tank 1 by l intermediate of a pipe 7. A pipe 8 is provided on the pipe 7 provided with a valve 9 controlled by the pressure prevailing in the pipe 7. A pipe 10 for supplying auxiliary nitrogen gas provided with a valve 11 and supplied by an external nitrogen source opens into the same pipe 7 downstream of the vent 8.

La base du séparateur 3 est reliée à celle du récipient 4 par une conduite 12, et le sommet du séparateur est équipé d'un évent 13 muni d'un limiteur de pression non représenté. De plus, une conduite 14 pourvue d'une vanne 15 permet d'amener de l'azote gazeux dans la partie supérieure du récipient 4 à partir d'une source d'azote extérieure.The base of the separator 3 is connected to that of the container 4 by a line 12, and the top of the separator is equipped with a vent 13 provided with a pressure limiter not shown. In addition, a pipe 14 provided with a valve 15 makes it possible to bring nitrogen gas into the upper part of the container 4 from an external nitrogen source.

En fonctionnement, de l'azote liquide est vaporisé dans l'échangeur 2 à contre-courant du gaz sortant du réservoir 1. Ce gaz est ainsi partiellement condensé, et le liquide obtenu est recueilli dans le séparateur 3 et transféré dans le récipient 4 par la conduite 12.In operation, liquid nitrogen is vaporized in the exchanger 2 against the flow of the gas leaving the reservoir 1. This gas is thus partially condensed, and the liquid obtained is collected in the separator 3 and transferred to the container 4 by driving 12.

L'azote gazeux vaporisé dans l'échangeur 2 est envoyé par la conduite 7 dans le réservoir 1, à l'opposé de l'orifice de sortie des gaz de ce réservoir, et pousse le contenu gazeux du réservoir vers les passages 5 de l'échangeur 2. Ainsi, l'azote est utilisé une première fois pour son pouvoir frigorifique, puis une deuxième fois pour son énergie mécanique et pour ses propriétés d'inertage.The nitrogen gas vaporized in the exchanger 2 is sent via line 7 to the tank 1, opposite the gas outlet orifice of this tank, and pushes the gas content of the tank towards the passages 5 of the exchanger 2. Thus, nitrogen is used a first time for its cooling capacity, then a second time for its mechanical energy and for its inerting properties.

Au fur et à mesure de l'avancement de l'opération, la teneur en gaz combustible du gaz sortant du réservoir diminue. Par suite, la quantité d'azote liquide nécessaire pour récupérer le gaz combustible diminue elle aussi, et il arrive un moment où le débit d'azote vaporsié ne suffit plus pour purger efficacement le réservoir. On injecte alors de l'azote gazeux supplémentaire par la conduite 10.As the operation progresses, the combustible gas content of the gas leaving the tank decreases. As a result, the amount of liquid nitrogen required to recover the combustible gas also decreases, and there comes a point when the flow of vaporized nitrogen is no longer sufficient to effectively purge the tank. Additional nitrogen gas is then injected through line 10.

Comme représenté à la figure 2, si la pression qui règne dans le réservoir 1 est insuffisante et que l'on ne peut pas envisager de l'augmenter notablement, on peut monter un compresseur 16 entre la sortie du réservoir 1 et l'entrée des passages 5. Le gaz formé dans le séparateur 3 peut alors être réinjecté dans les passages 6 de l'échangeur 2 qui véhiculent l'azote liquide par une conduite 17, laquelle est munie d'une vanne 18 pilotée par la pression du séparateur. Une telle réinjection suppose toutefois que la teneur du gaz du séparateur en produit à récupérer est suffisamment faible, de sorte qu'elle n'intervient qu'à un stade déjà avancé de l'opération de purge, dans une phase où,précisément, le débit d'azote nécessaire pour la condensation ne suffit plus pour assurer une purge efficace. L'évent 13 est équipé d'une vanne de commande 18A.As shown in FIG. 2, if the pressure prevailing in the tank 1 is insufficient and it is not possible to envisage increasing it significantly, a compressor 16 can be mounted between the outlet of the tank 1 and the inlet of the passages 5. The gas formed in the separator 3 can then be reinjected into the passages 6 of the exchanger 2 which convey the liquid nitrogen by a line 17, which is provided with a valve 18 controlled by the pressure of the separator. Such reinjection assumes, however, that the content of the gas in the separator in product to be recovered is sufficiently low, so that it occurs only at an already advanced stage of the purging operation, in a phase where, precisely, the Nitrogen flow required for condensation is no longer sufficient to ensure effective purging. Vent 13 is equipped with an 18A control valve.

Si le gaz contenu dans le réservoir 1 est très froid, le schéma de la figure 2 suppose que l'on dispose d'un compresseur 16 de type cryogénique. Suivant la variante de la figure 3, il peut être plus intéressant de faire appel à un compresseur ordinaire, mins coûteux, et à un échangeur auxiliaire 19 assurant un échange thermique indirect à contre-courant entre le gaz entrant dans le compresseur et le gaz qui en sort. A part cette différence, l'agencement de la figure 3 est identique à celui de la figure 2.If the gas contained in the tank 1 is very cold, the diagram in FIG. 2 assumes that there is a compressor 16 of the cryogenic type. According to the variant of FIG. 3, it may be more advantageous to use an ordinary compressor, less expensive, and an auxiliary exchanger 19 ensuring an indirect heat exchange against the current between the gas entering the compressor and the gas which comes out. Apart from this difference, the arrangement of FIG. 3 is identical to that of FIG. 2.

La figure 4 illustre une variante du schéma de la figure 1 qui permet de pousser à un degré élevé la récupération sans augmenter la pression du gaz sortant du réservoir, et donc sans faire appel à un compresseur et à un échangeur de chaleur adapté pour supporter des pressions élevées. Pour cela, il faut abaisser la température dans l'échangeur 2, ce qui conduit à la présence d'un liquide sous-refroidi dans le séparateur 3. On procède donc à un réchauffage de ce liquide dans la conduite 12 en lui faisant céder des frigories au gaz sortant du réservoir 1 avant que ce dernier ne pénètre dans les passages 5 de l'échangeur principal 2. En d'autres termes, l'échangeur de chaleur auxiliaire 20 assure un échange de chaleur à contre-courant entre la conduite de sortie du réservoir et la conduite 12, et le gaz traité est prérefroidi avant d'échanger de la chaleur avec l'azote liquide. On comprend que cette variante améliore le bilan thermique de l'insatllation.Figure 4 illustrates a variant of the diagram of Figure 1 which allows to push to a high degree the recovery without increasing the pressure of the gas leaving the tank, and therefore without using a compressor and a heat exchanger adapted to withstand high pressures. For this, it is necessary to lower the temperature in the exchanger 2, which leads to the presence of a sub-cooled liquid in the separator 3. We therefore heat this liquid in line 12 by causing it to yield frigories with the gas leaving the tank 1 before the latter enters the passages 5 of the main exchanger 2. In other words, the auxiliary heat exchanger 20 provides a countercurrent heat exchange between the supply line outlet of the reservoir and the pipe 12, and the treated gas is precooled before exchanging heat with the liquid nitrogen. It is understood that this variant improves the thermal balance of the insatllation.

On a également représenté à la figure 4 un by-pass 21 reliant les tronçons de la conduite de sortie du réservoir situés avant et après l'échangeur 20. Ce by-pass est équipé d'une vanne 22 pilotée par la température régnant dans la conduite 12 en aval de l'échangeur 20. Ainsi, le débit de gaz qui traverse effectivement cet échangeur est piloté par la quantité de chaleur qui est échangée.FIG. 4 also shows a bypass 21 connecting the sections of the tank outlet pipe located before and after the exchanger 20. This bypass is equipped with a valve 22 controlled by the temperature prevailing in the line 12 downstream of the exchanger 20. Thus, the gas flow which effectively passes through this exchanger is controlled by the quantity of heat which is exchanged.

Dans chaque mode de réalisation, il est possible de renvoyer du gaz issu du séparateur 3 dans la partie stpérieure du récipient 4 pour inerter ce dernier, comme représenté par une conduite 23 munie d'une vanne 24 aux figures 2 et 3.In each embodiment, it is possible to return gas from the separator 3 to the stpérieur part of the container 4 to inert the latter, as represented by a pipe 23 provided with a valve 24 in FIGS. 2 and 3.

Il est clair que le procédé et l'installation suivant l'invention peuvent s'appliquer à de nombreux cas où il est nécessaire de purger un réservoir d'un contenu gazeux coûteux, polluant, etc, par exemple un réservoir d'ammoniac, d'acide, d'hydrocarbures, etc.It is clear that the method and the installation according to the invention can be applied to numerous cases where it is necessary to purge a tank of an expensive gaseous, polluting content, etc., for example an ammonia tank, d acid, hydrocarbons, etc.

Claims (13)

1. - Procédé de traitement d'un site de stockage (1), notamment de purge et d'inertage de réservoir (1), du type dans lequel on expulse un produit gazeux contenu dans ledit site en y injectant de l'azote, caractérisé en ce qu'on effectue un échange de chaleur indirect (2) entre le gaz sortant dudit site (1) et de l'azote liquide, de manière à condenser partiellement ce gaz, et en ce qu'on injecte dans ledit site l'azote gazeux résultant de cette vaporisation d'azote liquide.1. - Method for treating a storage site (1), in particular for purging and inerting of reservoir (1), of the type in which a gaseous product contained in said site is expelled by injecting nitrogen therein, characterized in that an indirect heat exchange (2) is carried out between the gas leaving said site (1) and liquid nitrogen, so as to partially condense this gas, and in that one injects into said site l nitrogen gas resulting from this vaporization of liquid nitrogen. 2. - Procédé suivant la revendication 1, pour la purge et l'inertage d'un réservoir (1), caractérisé en ce que ledit azote gazeux est injecté dans le réservoir à l'opposé d'un orifice de sortie des gaz de ce réservoir.2. - Method according to claim 1, for the purging and inerting of a tank (1), characterized in that said nitrogen gas is injected into the tank opposite a gas outlet orifice of this tank. 3. - Procédé suivant l'une des revendications 1 et 2, caractérisé en ce que, dans une phase avancée de l'opération, on effectue également un échange de chaleur indirect (2) entre le gaz sortant dudit site (1) et du gaz résultant de ladite condensation partielle, ce dernier gaz étant adjoint audit azote gazeux.3. - Method according to one of claims 1 and 2, characterized in that, in an advanced phase of the operation, there is also carried out an indirect heat exchange (2) between the gas leaving said site (1) and gas resulting from said partial condensation, the latter gas being added to said nitrogen gas. 4. - Procédé suivant l'une quelconque des revendications 1 à 3, caractérisé en ce qu'on envoie du gaz résultant de ladite condensation partielle dans la partie supérieure d'un récipient (4) de stockage du liquide recueilli lors de cette condensation.4. - Method according to any one of claims 1 to 3, characterized in that gas is sent resulting from said partial condensation in the upper part of a container (4) for storing the liquid collected during this condensation. 5. - Procédé suivant l'une quelconque des revendications 1 à 4, caractérisé en ce qu'on comprime le gaz à sa sortie dudit site (1).5. - Method according to any one of claims 1 to 4, characterized in that the gas is compressed at its outlet from said site (1). 6. - Procédé suivant la revendication 5, pour site de stockage (1) contenant un produit gazeux à basse température, caractérisé en ce qu'on effectue un échange de chaleur indirect (19) entre le gaz sortant dudit site et le gaz comprimé.6. - Method according to claim 5, for storage site (1) containing a gaseous product at low temperature, characterized in that an indirect heat exchange is carried out (19) between the gas leaving said site and the compressed gas. 7. - Procédé suivant l'une quelconque des revendications 1 à 6, caractérisé en ce qu'on effectue un échange de chaleur indirect (20) entre le gaz sortant dudit site (1) et le liquide résultant de ladite condensation partielle.7. - Method according to any one of claims 1 to 6, characterized in that an indirect heat exchange (20) is carried out between the gas leaving said site (1) and the liquid resulting from said partial condensation. 8. - Procédé suivant l'une quelconque des revendications 1 à 7, caractérisé en ce que, dans une phase avancée de l'opération, on canplé- mente ladite injection d'azote gazeux par une injection dans ledit site (1) d'azote gazeux provenant d'une source extérieure (10).8. - Method according to any one of claims 1 to 7, characterized in that, in an advanced phase of the operation, said injection of nitrogen gas is planted by an injection into said site (1) of nitrogen gas from an external source (10). 9. - Installation de traitement d'un site de stockage (1), notamment de purge et d'inertage de réservoir (1), caractérisée en ce qu'elle comprend: un séparateur de phases (3) ; un récipient de stockage (4) communiquant avec le séparateur de phases ; et un échangeur de chaleur indirect (2) comportant des premiers passages (5) destinés à être reliés en amont audit site (1) et reliés en aval au séparateur (3), et des deuxièmes passages (6) reliés en amont à une source d'azote liquide et destinés à être reliés en aval audit site (1).9. - Installation for treating a storage site (1), in particular for purging and inerting the reservoir (1), characterized in that that it comprises: a phase separator (3); a storage container (4) communicating with the phase separator; and an indirect heat exchanger (2) comprising first passages (5) intended to be connected upstream to said site (1) and connected downstream to the separator (3), and second passages (6) connected upstream to a source liquid nitrogen and intended to be connected downstream to said site (1). 10. - Installation suivant la revendication 9, pour la purge et l'inertage d'un réservoir (1), caractérisée en ce que lesdits premiers (5) et deuxièmes (6) passages sont destinés à être reliés à des orifices du réservoir opposés l'un à l'autre.10. - Installation according to claim 9, for the purging and inerting of a tank (1), characterized in that said first (5) and second (6) passages are intended to be connected to opposite tank openings to one another. 11. - Installation suivant l'une des revendications 9 et 10, caractérisée en ce qu'un compresseur (16) est interposé entre ledit site (1) et l'entrée desdits premiers passages (5) de l'échangeur de chaleur (2).11. - Installation according to one of claims 9 and 10, characterized in that a compressor (16) is interposed between said site (1) and the inlet of said first passages (5) of the heat exchanger (2 ). 12. - Installation suivant l'une quelconque des revendications 9 à 11, caractérisée en ce qu'elle comprend un échangeur de chaleur indirect auxiliaire (20) comprenant des troisièmes passages reliés à la partie inférieure du séparateur de phases (3) et du récipient de stockage (4), et des quatrièmes passages destinés à être reliés en amont audit site (1) et reliés en aval à l'entrée desdits premiers passages (5), et/ou un échangeur de chaleur indirect auxiliaire (19) qui met en relation d'échange thermique les conduites d'entrée et de sortie du compresseur (16).12. - Installation according to any one of claims 9 to 11, characterized in that it comprises an auxiliary indirect heat exchanger (20) comprising third passages connected to the lower part of the phase separator (3) and of the container storage (4), and fourth passages intended to be connected upstream to said site (1) and connected downstream to the inlet of said first passages (5), and / or an auxiliary indirect heat exchanger (19) which puts in relation to heat exchange the inlet and outlet pipes of the compressor (16). 13. - Installation suivant l'une quelconque des revendications 9 à 12, caractérisée en ce qu'elle comprend des moyens (17, 18, 22, 23) pour envoyer du gaz issu du séparateur (3) dans lesdits deuxièmes passages (6) et/ou dans le récipient de stockage (4).13. - Installation according to any one of claims 9 to 12, characterized in that it comprises means (17, 18, 22, 23) for sending gas from the separator (3) into said second passages (6) and / or in the storage container (4).
EP19850400512 1984-03-23 1985-03-18 Process and installation for the treatment of a storage site Expired EP0159234B1 (en)

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WO1990009343A1 (en) * 1989-02-10 1990-08-23 Peter Weil Process and device for evacuating the content of gas spaces of large containers containing pollutant substances
AU629902B2 (en) * 1989-02-10 1992-10-15 Peter Weil Process and device for evacuating the content of gas spaces of large containers containing pollutant substances
WO1993008103A1 (en) * 1991-10-18 1993-04-29 Noya N.V. Apparatus for flame- and explosion-proofing an inflammable and explosive liquid in a tank, and for cleaning the tank when empty
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ES541499A0 (en) 1986-11-16
AU4020185A (en) 1985-09-26
FR2561751B1 (en) 1988-11-10
AU569567B2 (en) 1988-02-04
CA1272118A (en) 1990-07-31
ES8701350A1 (en) 1986-11-16
JPS60232286A (en) 1985-11-18
DE3560254D1 (en) 1987-07-23
ATE27792T1 (en) 1987-07-15
FR2561751A1 (en) 1985-09-27
EP0159234B1 (en) 1987-06-16
ZA852010B (en) 1985-11-27
US4604115A (en) 1986-08-05

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