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WO2006008299A1 - Method for transferring a fluid - Google Patents

Method for transferring a fluid Download PDF

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Publication number
WO2006008299A1
WO2006008299A1 PCT/EP2005/053488 EP2005053488W WO2006008299A1 WO 2006008299 A1 WO2006008299 A1 WO 2006008299A1 EP 2005053488 W EP2005053488 W EP 2005053488W WO 2006008299 A1 WO2006008299 A1 WO 2006008299A1
Authority
WO
WIPO (PCT)
Prior art keywords
container
fluid
hfc
anyone
dry coupling
Prior art date
Application number
PCT/EP2005/053488
Other languages
French (fr)
Inventor
Martin Schwiegel
Reiner Distel
Original Assignee
Solvay (Societe Anonyme)
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 Solvay (Societe Anonyme) filed Critical Solvay (Societe Anonyme)
Priority to EP05776199A priority Critical patent/EP1792116A1/en
Publication of WO2006008299A1 publication Critical patent/WO2006008299A1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • 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
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/002—Automated filling apparatus
    • F17C5/007—Automated filling apparatus for individual gas tanks or containers, e.g. in vehicles
    • 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
    • F17C6/00—Methods and apparatus for filling vessels not under pressure with liquefied or solidified 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
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • F17C7/04—Discharging liquefied gases 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
    • 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
    • F17C2205/0352—Pipes
    • F17C2205/0364—Pipes flexible or articulated, e.g. a hose
    • 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
    • F17C2205/0352—Pipes
    • F17C2205/0367—Arrangements in parallel
    • 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
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/038—Refrigerants
    • 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
    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/03—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the pressure level
    • F17C2225/033—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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/03—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the pressure level
    • F17C2225/035—High pressure, i.e. between 10 and 80 bars
    • 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
    • F17C2225/04—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by other properties of handled fluid after transfer
    • F17C2225/042—Localisation of the filling point
    • F17C2225/046—Localisation of the filling point 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
    • F17C2227/01—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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/03—Dealing with losses
    • F17C2260/035—Dealing with losses of 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/04—Reducing risks and environmental impact
    • F17C2260/042—Reducing risk of explosion
    • 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
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/06—Fluid distribution
    • F17C2265/063—Fluid distribution for supply of refuelling stations
    • 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
    • F17C2270/0134—Applications for fluid transport or storage placed above the ground
    • F17C2270/0139—Fuel stations

Definitions

  • the present invention relates to a method for transferring a fluid comprising a hydrofluorocarbon.
  • Hydrofluorocarbons and their mixtures are useful products which are used for example, in refrigeration applications, as foam blowing agents or as solvents.
  • the hydrofluorocarbons have often a high vapour pressure.
  • Patent application EP-A-0979855 discloses a method for filling a certain zeotropic mixed refrigerant wherein the refrigerant is drawn out from the liquid phase of a feeding container and filled into a receiving container. It was desirable to have available a method for transferring a fluid comprising a hydrofluorocarbon fulfilling the aforementioned criteria.
  • the invention concerns a method for transferring a fluid comprising at least a flammable hydrofluorocarbon from a first container to a second container wherein the fluid is transported through at least one line which is connected at least to the first container by a dry coupling.
  • Dry coupling is understood to denote in particular a coupling composed of a male part and a female part and which male and female parts are closed when they are not connected to each other and are opened only when they are connected together.
  • dry couplings are commercialised, for example by ARTA Armaturen und Tankgeratebau GmbH.
  • the dry coupling is preferably made of stainless steel. Its female part is generally permanently connected to the line by any suitable technique such as welding or preferably by a flange connection. Its male part is generally permanently connected to the first container by any suitable technique such as welding or preferably by a flange connection.
  • the dimension of the coupling is typically from DN (diameter nominal) 80 to DN 25.
  • the line is often a flexible hose.
  • the hose is made of any material resistant to diffusion of the fluid and is preferably made of stainless steel.
  • the fluid is preferably transferred from the first container to the second container in the liquid state.
  • the transfer rate of the fluid is generally from 1 to 15 m 3 /h, preferably from 4 to 10 m 3 /h.
  • the first container is often chosen from a road or sea tanker e.g. a container lorry or a container ship, preferably a container lorry, and an ISO tank.
  • a road or sea tanker e.g. a container lorry or a container ship, preferably a container lorry, and an ISO tank.
  • the first container is an ISO tank, it is generally equipped with the male part of the dry coupling. It has been found that it is possible to provide an ISO tank having a storage space for the male part of the dry coupling and a valve part which can be connected to said male part, for example by a flange connection.
  • the male part is preferably permanently connected to the tank.
  • the storage space is designed to incorporate the dry coupling, in particular its male part.
  • the length of said space is typically from 120 to 220 mm. Its width is generally determined by the dimension of the coupling as stated above.
  • flammable compound is understood to denote in particular a compound which is classified flammable when tested according to any applicable standard.
  • An example of such standard is
  • the fluid often comprises difluoromethane (HFC-32), 1,1-difluoroethane (HFC- 152a), 1,1,1- trifluoroethane (HFC-143a) or 1,1,1,3,3-pentafluorobutane (HFC-365mfc).
  • HFC-32 difluoromethane
  • HFC- 152a 1,1-difluoroethane
  • HFC-143a 1,1,1- trifluoroethane
  • HFC-365mfc 1,1,1,3,3-pentafluorobutane
  • the method according to the invention is also particularly suitable when the fluid comprises a zeotropic mixture selected from R404A, R407C and
  • R410A It can also be used for azeotropic mixtures such as R507 or HFC-365mfc in azeotropic mixture with n-pentane, isopentane, cyclopentane or n-hexane.
  • the method according to the invention can also be advantageously used when the fluid comprises a hydrocarbon in addition to flammable or non ⁇ flammable hydrofluorocarbon.
  • hydrocarbons often comprise from 3 to 8 carbon atoms and are in particular selected from propane, cyclopropane, n- butane, isobutene, cyclobutane, n-pentane, isopentane, cyclopentane and n- hexane.
  • the fluid generally contains at least 10% by weight of flammable compounds. Often this content is at least 20% by weight.
  • the fluid can consist of flammable compounds. If a mixture with a non-flammable compound is used, the content of flammable compounds is generally at most 80% by weight. Often this content is at most 60% by weight.
  • the fluid which is preferably essentially in the liquid state, is pumped by the pump (10) from the first container (6) through a liquid hose (7) which is connected to the first container by the dry coupling (11) into the second container (8) while a gaseous space in the second container communicates with the first container through a vapour hose (9) which is connected to the first container by the dry coupling (12).
  • a mode of carrying out the invention by consecutive operations is illustrated hereafter with reference to Figure 1 :
  • the storage tank operator closes the manual bypass valve 3 on the equalization line (13) connecting liquid hose (7) and vapour hose (9).
  • the tank operator opens the vapour balance line valve (1) and liquid fill line valve (2) on the storage tank. 5.
  • the road tanker driver opens the liquid and vapour line valves (4) and (5).

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

Abstract

Method for transferring a fluid comprising at least a flammable hydrofluorocarbon from a first container to a second container wherein the composition is transported through at least one line which is connected at least to the first container by a dry coupling.

Description

Method for transferring a fluid
The present invention relates to a method for transferring a fluid comprising a hydrofluorocarbon.
Hydrofluorocarbons and their mixtures are useful products which are used for example, in refrigeration applications, as foam blowing agents or as solvents. The hydrofluorocarbons have often a high vapour pressure. For economical and notably ecological reasons, it is desirable to ensure a delivery of the compounds or compositions as complete as possible from e.g. transport containers to storage containers.
Such delivery should be carried out with minimum losses of product, maximum security and the desired product quality of the delivered product should be achieved.
Patent application EP-A-0979855 discloses a method for filling a certain zeotropic mixed refrigerant wherein the refrigerant is drawn out from the liquid phase of a feeding container and filled into a receiving container. It was desirable to have available a method for transferring a fluid comprising a hydrofluorocarbon fulfilling the aforementioned criteria.
In consequence, the invention concerns a method for transferring a fluid comprising at least a flammable hydrofluorocarbon from a first container to a second container wherein the fluid is transported through at least one line which is connected at least to the first container by a dry coupling.
It has been found that the method according to the invention can be safely used to transfer even flammable hydrofluorocarbons having high vapour pressures and without any substantial losses of product.
"Dry coupling " is understood to denote in particular a coupling composed of a male part and a female part and which male and female parts are closed when they are not connected to each other and are opened only when they are connected together. Such dry couplings are commercialised, for example by ARTA Armaturen und Tankgeratebau GmbH.
The dry coupling is preferably made of stainless steel. Its female part is generally permanently connected to the line by any suitable technique such as welding or preferably by a flange connection. Its male part is generally permanently connected to the first container by any suitable technique such as welding or preferably by a flange connection.
The dimension of the coupling is typically from DN (diameter nominal) 80 to DN 25. In the method according to the invention, the line is often a flexible hose.
In this case, the hose is made of any material resistant to diffusion of the fluid and is preferably made of stainless steel.
In the method according to the invention, the fluid is preferably transferred from the first container to the second container in the liquid state. In the method according to the invention, the transfer rate of the fluid is generally from 1 to 15 m3/h, preferably from 4 to 10 m3/h.
In the method according to the invention, the first container is often chosen from a road or sea tanker e.g. a container lorry or a container ship, preferably a container lorry, and an ISO tank. If the first container is an ISO tank, it is generally equipped with the male part of the dry coupling. It has been found that it is possible to provide an ISO tank having a storage space for the male part of the dry coupling and a valve part which can be connected to said male part, for example by a flange connection. The male part is preferably permanently connected to the tank. The storage space is designed to incorporate the dry coupling, in particular its male part. The length of said space is typically from 120 to 220 mm. Its width is generally determined by the dimension of the coupling as stated above.
In the sense of the present invention "flammable compound" is understood to denote in particular a compound which is classified flammable when tested according to any applicable standard. An example of such standard is
ASTM E 681/ASHRAE 34 (e.g. 2001 version).
In the method according to the invention, the fluid often comprises difluoromethane (HFC-32), 1,1-difluoroethane (HFC- 152a), 1,1,1- trifluoroethane (HFC-143a) or 1,1,1,3,3-pentafluorobutane (HFC-365mfc). The method according to the invention is particularly suitable when the fluid comprises or consists of difluoromethane (HFC-32).
The method according to the invention is also particularly suitable when the fluid comprises a zeotropic mixture selected from R404A, R407C and
R410A. It can also be used for azeotropic mixtures such as R507 or HFC-365mfc in azeotropic mixture with n-pentane, isopentane, cyclopentane or n-hexane. The method according to the invention can also be advantageously used when the fluid comprises a hydrocarbon in addition to flammable or non¬ flammable hydrofluorocarbon. In this case, hydrocarbons often comprise from 3 to 8 carbon atoms and are in particular selected from propane, cyclopropane, n- butane, isobutene, cyclobutane, n-pentane, isopentane, cyclopentane and n- hexane.
In the method according to the invention, the fluid generally contains at least 10% by weight of flammable compounds. Often this content is at least 20% by weight. In the method according to the invention, the fluid can consist of flammable compounds. If a mixture with a non-flammable compound is used, the content of flammable compounds is generally at most 80% by weight. Often this content is at most 60% by weight.
Referring to figure 1, a preferred embodiment of the method according to the invention is illustrated: In this embodiment, the fluid which is preferably essentially in the liquid state, is pumped by the pump (10) from the first container (6) through a liquid hose (7) which is connected to the first container by the dry coupling (11) into the second container (8) while a gaseous space in the second container communicates with the first container through a vapour hose (9) which is connected to the first container by the dry coupling (12). A mode of carrying out the invention by consecutive operations is illustrated hereafter with reference to Figure 1 :
1. The storage tank operator closes the manual bypass valve 3 on the equalization line (13) connecting liquid hose (7) and vapour hose (9).
2. The preferably used dust caps are removed from all parts of the dry couplings (11) and (12).
3. The female parts of the couplings on the liquid and the vapour hoses (7) and (9) are threaded to the appropriate male parts on the road tanker.
4. The tank operator opens the vapour balance line valve (1) and liquid fill line valve (2) on the storage tank. 5. The road tanker driver opens the liquid and vapour line valves (4) and (5).
6. The refrigerant is now pumped into the storage tank (8).
7. When the delivery is finished, the pump (10) is turned off.
8. The vapour and liquid valves (4) and (5) on the road tanker are closed.
9. The vapour balance line valve (1) and liquid fill line valve (2) on the storage tank (8) are closed.
10. The manual bypass valve (3) on the equalizing line (13) is opened. - A -
11. The female parts of the couplings (11) and (12) on the liquid and the vapour hoses are disconnected from the male parts on the road tanker, are protected again with the dust caps, and are stored orderly.

Claims

C L A I M S
1 - Method for transferring a fluid comprising at least a flammable hydrofluorocarbon from a first container to a second container wherein the fluid is transported through at least one line which is connected at least to the first container by a dry coupling.
2 - Method according to claim 1, wherein the line is a flexible hose.
3 - Method according to claim 1 or 2, wherein the dry coupling is made of stainless steel.
4 - Method according to anyone of claims 1 to 3, wherein the fluid is transferred in the liquid state.
5 - Method according to anyone of claims 1 to 4, wherein the fluid is pumped from the first container (6) through a liquid hose (7) into the second container (8) while a gaseous space in the second container communicates with the first container through a vapour hose (9) which is connected to the first container by a dry coupling.
6 - Method according to anyone of claims 1 to 5, wherein the transfer rate of the fluid is from 1 to 15 m3/h.
7 - Method according to anyone of claims 1 to 6, wherein the fluid comprises difluoromethane (HFC-32), 1,1-difluoroethane (HFC-152a), 1,1,1- trifluoroethane (HFC-143a) or 1,1,1,3,3-pentafluorobutane (HFC-365mfc).
8 - Method according to claim 7, wherein the fluid comprises difluoromethane (HFC-32).
9 - Method according to claim 7 or 8, wherein the fluid comprises a zeotropic mixture selected from R404A, R407C and R410A.
10 - Method according to anyone of claims 1 to 9, wherein the fluid comprises in addition a hydrocarbon.
11 - ISO tank equipped with the male part of a dry coupling.
PCT/EP2005/053488 2004-07-23 2005-07-19 Method for transferring a fluid WO2006008299A1 (en)

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EP04103528 2004-07-23

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FR2942293A1 (en) * 2009-02-19 2010-08-20 Air Liquide METHOD AND INSTALLATION FOR FILLING WITH A CRYOGENIC LIQUID OF A RESERVOIR
DK201370790A1 (en) * 2013-12-19 2015-06-29 Cosan Crisplant As Liquid Natural Gas transfer
FR3017183A1 (en) * 2014-02-03 2015-08-07 Cryostar Sas CRYOGENIC LIQUID DELIVERY SYSTEM
WO2016097460A1 (en) * 2014-12-16 2016-06-23 Wärtsilä Finland Oy Lng tank and system for connecting at least one pipe between an lng tank and a tank connection space thereof
CN107524911A (en) * 2017-09-18 2017-12-29 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） Liquid oxygen filling and recovery system for underwater working platform

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CN107002945B (en) * 2014-12-16 2019-09-10 瓦锡兰芬兰有限公司 LNG storage tank and ship
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WO2016097460A1 (en) * 2014-12-16 2016-06-23 Wärtsilä Finland Oy Lng tank and system for connecting at least one pipe between an lng tank and a tank connection space thereof
CN107524911A (en) * 2017-09-18 2017-12-29 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） Liquid oxygen filling and recovery system for underwater working platform

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EP1792116A1 (en) 2007-06-06

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