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US1953533A - Method and apparatus for dispensing gas material - Google Patents

Method and apparatus for dispensing gas material Download PDF

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Publication number
US1953533A
US1953533A US61250232A US1953533A US 1953533 A US1953533 A US 1953533A US 61250232 A US61250232 A US 61250232A US 1953533 A US1953533 A US 1953533A
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Prior art keywords
container
gas
conduit
main
liquefied gas
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Harry D Edwards
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Linde Air Products Co
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Linde Air Products Co
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Priority to US61250232 priority Critical patent/US1953533A/en
Priority to DEE44244D priority patent/DE611695C/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
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/03—Orientation
    • F17C2201/035—Orientation with substantially horizontal main axis
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0375—Thermal insulations by 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0626—Multiple walls
    • F17C2203/0629—Two walls
    • 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
    • F17C2221/011—Oxygen
    • 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
    • F17C2221/013—Carbone dioxide
    • 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
    • F17C2221/031—Air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0107—Single phase
    • F17C2225/0123—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
    • 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
    • F17C2227/0302—Heat exchange with the fluid by heating
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2559—Self-controlled branched flow systems
    • Y10T137/2562—Dividing and recombining

Definitions

  • This invention relates to a method and apparatus for dispensing gas material, particularly gas material which is stored in the liquefiedstate. at temperatures below 273 Kelvin, and has for its object generally to provide a method and means for avoiding the customary practice 01' providing two main containers at the place of discharge and still retain means for a continuous supply of gas material to the consuming apparatus.
  • the invention has for its object the provision of a main container for liquefied gas with a cooperating auxiliary container and a method of operating the same whereby all the functions of two main containers are performed but at a material saving in both cost and equipment.
  • a further object is so to arrange an auxiliary container in conjunction with amain container that it serves as a. means for heating the gas material and for the evaporation oi. a desired portion of liquefied gas.
  • the invention accordingly comprises the'several steps and the relation of one or more of such steps with respect to each of the others, and the apparatus embodying features of construction, combinations of elements and arrangements of parts which are adapted to effect such steps, all as exemplified in the following detailed disclosure, and the scope of the application of which will be indicated in the claims.
  • the figure is a vertical sectional view of a main container for liquefied gases having a preferred form of an auxiliary container, constructed for the practice of the method of the invention.
  • A a main container for liquefied gas is shown generally by A, which with a stop valve 21.
  • insulating means 13 which may be gas or a solid material.
  • the liquefied gas is charged into the container through a conduit 14 which is fitted at its outer end with a stop valve 15 and has a portion leading to the lower part of the vessel 10 terminating close to the bottom thereof.
  • Branching from the conduit 14 after it emerges from the inner vessel is a withdrawal conduit '16 that passes through the outer envelope 12 into heat exchanging relation with the auxiliary container B. '65
  • the auxiliary container isconstructed to have an outergenvelope 17, an inner vessel 18 which is preferably of smaller capacity than the vessel 10, and heat insulation means 19 which substantially envelops the inner vessel 18.
  • the conduit 7 16 is preferably coiled around the inner. vessel 18 within the envelope 17, after which it joins with a common discharge conduit 20. Near the'junc- 'tion with conduit 20 the conduit 16 isprovided From the bottom of inner vessel 18 of the auxiliary container, a discharge conduit 22 having a nected at the bottom of vessel 10 in the main Q container which passes through the envelopes 12 and 17 and communicates with the inner vessel 18 at a convenient point. This conduit may'be covered by insulation.
  • a gas phase withdrawal conduit 25 which passes through the envelope 12 and joins with'a discharge conduit 26.
  • a discharge conduit 2'? leads from the upper portion of the inner vessel 18, out through the envelope 1'1 to join with conduit 26.
  • a safety valve 28 is preferably provided in communication with conduit 26 to relieve any excess pressure that may I occur in the system.
  • the conduit 26 is also provided with a control valve 29.
  • a suitable heating element is associated with the auxiliary container, for example a heating coil having an inlet and an outlet, as shown at 30 and 31, respectively;
  • conduits 16, 24 and 25' are provided with suitable coupling means, indicated at 16, 24' and 25', respectively, and provided with control valves 16", 2 4", and 25", respectively, for disconnecting and controlling these conduits preferably at points just outside of the envelope 12.
  • suitable coupling means indicated at 16, 24' and 25', respectively, and provided with control valves 16", 2 4", and 25", respectively, for disconnecting and controlling these conduits preferably at points just outside of the envelope 12.
  • These coupling 'means' also include suitable stop valves, not shown in the interests of clearness.
  • a portable .main container A charged with liquefied gas, for example, liquid oxygen, nitrogen, or carbon dioxide is, after conveyance to the place of consumption, connected to the auxiliary container andthe consuming apparatus, as
  • liquefied gas is permitted to drain from the bottom of the inner vessel 10 of the main container into the auxiliary container.
  • auxiliary container be warm, liquefied gas that enters the inner vessel 18 will be vaporized with the result that the pressure in both containers will increase to a value desired for subsequent operation.
  • the vaporization will occur at a rapid rate until the vessel '18 andits adjacent parts and insulation have been cooled to substantially the temperature of the liquefied gas.
  • the valve 29 on the gas withdrawal conduit 26 is kept closed until the pressure has risen to the desired point, after which it is opened sufficlently to permit only enough gas to flow to hold the pressure in the containers constant at the desired value.
  • a warm gas which enters the heating conduit at 30 and leaves at 31.
  • This heating gas is preferably a portion of thegas material withdrawn from the main container after it has been heated.
  • valve 21 When the pressure in the containers is not above the desired normal, the valve 21 is opened sumciently to permit the discharge of liquefied gas at the desired rate through conduit 20 to the consuming apparatus, The path of flow of the liquefied gas is then up through the part of the conduit is thatfis inside oi the inner vessel ll,
  • conduit 16 thence out through conduit 16 and through the portion of conduit 16 that is coiled around the inner vessel 18, and then out tothe conduit 2 through valve 21.
  • the liquefied gas removes heat from the ,in-'-' nor vessel 18 and surrounding insulation, thus keeping them substantially at the liquefied gas temperature.
  • the purpose of thus adding reirigeration to the inner vessel is to reduce the rate of heat leak into the inner vessel from exing valve 21 and opening sufilciently the valve 23 in the conduit 22 which provides communication between the bottom of inner vessel 18 and the withdrawal conduit 20.
  • the reserve of liquefied gas in the auxiliary container B is preferably suificient to allow time for the removal of the exhausted container A andvits replacement by a similar charged container. If the pressure of the gas material in the new main container is below the desired normal, a pressure increase may be obtained by evaporation of sufiicient liquefied gas by the introduction of warm gas through the heating conduit in the auxiliary container.
  • auxiliary container permits a continuous supply of gas material to the consuming apparatus without requiring the simultaneous presence or two or more main containers at the place of discharge.
  • the cost of manufacture of the auxiliary c'ontainer is materially less than the cost of manufacture of the main container, which results in a substantial advantage to the practice oi the method of the invention.
  • the auxiliary container serves as a means for vaporizing some of the liquefied gas for the purpose of increasing the pressure of the system. Another advantage of this method is that the heating of the main body of liquefied gas in the main container, formerly accomplished by means of a heating coil placed in the inner vessel oi the main container, is avoided.
  • a method for dispensing gas material which comprises providing a body of liquefied gas in a main container at a place of consumption, providing an additional body of gas in an auxiliary container permanently installed at the place of consumption and arranged to be supplied from the main container, increasing the pressure in both containers by evaporating a portion of the liquefied gas in said auxiliary container, supplying the demand for gas material at true place of consumption directly from said main body of gas until exhausted, and during the recharging interim supplying the demand directly from said auxiliary body of gas.
  • a method-for dispensing gas material which comprises providing a mobile main body oi liquefied gas which may be transported to and from the place of consumption, providing an additional body of liquefied gas in an auxiliary container permanently installed at the place of consumption and arranged to be supplied from said main container, increasing the pressure in both containers by evaporating a portion of the liq efied gas in said auxiliary container, supplying he demand for gas materialv directly from said main container until the body of liquid therein is exhausted, and thereafter supplying the demand for gas material directly from said additional body during the interim until the main body oi liquefied gas is renewed.
  • a method for dispensing gas material which comprises charging liquefied gas into a main container for liquefied gases, transferring a portion of said liquefied gas into an auxiliary container connected with said main container, discharging gas material from both said containers such that liquefied gas is first substantially exhausted from said main container, increasing the pressure in both containers to a de-' sired value by evaporating a portion of the liquefied gas within said auxiliary container, refrigerating the contents of said auxiliary container with transfer of heat to eflluent' gas material from said main container, and recharging said main container while continuing discharge of gas material from said auxiliary container.
  • a method for dispensing gas material which comprises transporting to destination liquefied gas in a portable container for liquefied gases, connectingsaid portable container with an auxiliary container and with apparatus for receiving and consuming gas material, transferring a portion of the liquefied gas from said portable container into said auxiliary container, discharging gas material from both said containers such that liquefied gas is first substantially exhausted from the portable container, increasing the pressure in both containers to the desired value by evaporating a portion of the liquefied gas within said auxiliary container, refrigerating the contents of said auxiliary container with transier of heat to eiiluent gas material from said portable container, and replacing said portable container with another similar portable container charged with gas material while continuing discharge of gas material from said auxiliary container.
  • apparatus for dispensing gas material comprising a main container for liquefied gas, a separate auxiliary container located at a distance from said main container and having connections for being filled from said main container, and discharge connections from each container having a common conduit leading to consuming apparatus forsupplying a .demand for gas material; said connections having control means whereby the demand for gas material is supplied selectively from said main container and from said auxiliary container.
  • apparatus for dispensing-gas material comprising a portable main con tainer for liquefied gas, a separate auxiliary container having detachable connections with said main container whereby the same is filled from said main container, withdrawal connections leading from said auxiliary container to consuming apparatus, and detachable withdrawal connections detachably connected to said main container communicating with said first-named withdrawal connections and provided with control means whereby the demand for gas material may be supplied selectively from said main container and from said auxiliary container.
  • apparatus for dispensing gas material comprising a main container for liquefied gas, an auxiliary container having a filling'connection leading from the bottom of said main container, gas and liquid phase withdrawal connections leading from said main container, said liquid phase withdrawal connection having a portion arranged to be in heat exchanging relation with the body of liquid in said auxiliary container, and branch connections leading from said auxiliary container to said gas and liquid phase withdrawal connections.
  • a main container for liquefied gas an auxiliary container having a fill- 100 ing connection leading from the bottom of said main container, gas and liquid phase withdrawal connections leading from said main container, said liquid phase withdrawal connections having a portion arranged to be in heat exchanging rela- 105 tion with the body of liquid in said auxiliary container, branch connections leading from said auxiliary container to said gas and liquid phase withdrawal connections, and a heating element associated with said auxiliary container.

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

Description

April 3, 1934.
H. D. EDWARDS 1,953,533 METHOD AND APPARATUS FOR DISPENSING GAS MATERIA Filed May 20. 1932 INVENTOR c/ /a r/w Patented Apr. 3, 1934 UNITED STATES PATENT ormcr.
ASMA
Barry D. memos, Larohmont, N. Y., assignor to The Linde Air Products Company, New York,
Application May 20, 1932, Serial No. 612,502
8 Claims. (01. 62-1) This invention relates to a method and apparatus for dispensing gas material, particularly gas material which is stored in the liquefiedstate. at temperatures below 273 Kelvin, and has for its object generally to provide a method and means for avoiding the customary practice 01' providing two main containers at the place of discharge and still retain means for a continuous supply of gas material to the consuming apparatus.
More specifically, the invention has for its object the provision of a main container for liquefied gas with a cooperating auxiliary container and a method of operating the same whereby all the functions of two main containers are performed but at a material saving in both cost and equipment. T
A further object is so to arrange an auxiliary container in conjunction with amain container that it serves as a. means for heating the gas material and for the evaporation oi. a desired portion of liquefied gas.
Other objects of the invention will in part be obvious and will in part appear hereinafter.
The invention accordingly comprises the'several steps and the relation of one or more of such steps with respect to each of the others, and the apparatus embodying features of construction, combinations of elements and arrangements of parts which are adapted to effect such steps, all as exemplified in the following detailed disclosure, and the scope of the application of which will be indicated in the claims.
For a fuller understanding of the nature and objects of the invention reference shouldbe had to the following detailed description taken in connection with the accompanying drawing, in which:
The figure is a vertical sectional view of a main container for liquefied gases having a preferred form of an auxiliary container, constructed for the practice of the method of the invention.
Referring now to the drawing, a main container for liquefied gas is shown generally by A, which with a stop valve 21.
insulating means 13 which may be gas or a solid material. The liquefied gas is charged into the container through a conduit 14 which is fitted at its outer end with a stop valve 15 and has a portion leading to the lower part of the vessel 10 terminating close to the bottom thereof. Branching from the conduit 14 after it emerges from the inner vessel is a withdrawal conduit '16 that passes through the outer envelope 12 into heat exchanging relation with the auxiliary container B. '65
The auxiliary container isconstructed to have an outergenvelope 17, an inner vessel 18 which is preferably of smaller capacity than the vessel 10, and heat insulation means 19 which substantially envelops the inner vessel 18. The conduit 7 16 is preferably coiled around the inner. vessel 18 within the envelope 17, after which it joins with a common discharge conduit 20. Near the'junc- 'tion with conduit 20 the conduit 16 isprovided From the bottom of inner vessel 18 of the auxiliary container, a discharge conduit 22 having a nected at the bottom of vessel 10 in the main Q container which passes through the envelopes 12 and 17 and communicates with the inner vessel 18 at a convenient point. This conduit may'be covered by insulation. Leading from the upper portion of vessel 10 is a gas phase withdrawal conduit 25 which passes through the envelope 12 and joins with'a discharge conduit 26. Similarly, a discharge conduit 2'? leads from the upper portion of the inner vessel 18, out through the envelope 1'1 to join with conduit 26. A safety valve 28 is preferably provided in communication with conduit 26 to relieve any excess pressure that may I occur in the system. The conduit 26 is also provided with a control valve 29. A suitable heating element is associated with the auxiliary container, for example a heating coil having an inlet and an outlet, as shown at 30 and 31, respectively;
To facilitate the removal of the container A after the desired amount of gas material has 1 2 been discharged therefrom and the replacement of same with a similar containerfully charged with liquefied gas, the conduits 16, 24 and 25'are provided with suitable coupling means, indicated at 16, 24' and 25', respectively, and provided with control valves 16", 2 4", and 25", respectively, for disconnecting and controlling these conduits preferably at points just outside of the envelope 12. These coupling 'means'also include suitable stop valves, not shown in the interests of clearness.
The method of operation of the apparatus in accordance with the invention is as follows:
A portable .main container A charged with liquefied gas, for example, liquid oxygen, nitrogen, or carbon dioxide is, after conveyance to the place of consumption, connected to the auxiliary container andthe consuming apparatus, as
' set forth above. Upon completing the connections, liquefied gas is permitted to drain from the bottom of the inner vessel 10 of the main container into the auxiliary container.
If the auxiliary container be warm, liquefied gas that enters the inner vessel 18 will be vaporized with the result that the pressure in both containers will increase to a value desired for subsequent operation. The vaporization will occur at a rapid rate until the vessel '18 andits adjacent parts and insulation have been cooled to substantially the temperature of the liquefied gas. The valve 29 on the gas withdrawal conduit 26 is kept closed until the pressure has risen to the desired point, after which it is opened sufficlently to permit only enough gas to flow to hold the pressure in the containers constant at the desired value.
If the quantity of liquefied gas vaporized in the auxiliary container be insufficient to raise the pressure the desired amount, additional heat is added to the liquid in the auxiliary container by means of a warm gas which enters the heating conduit at 30 and leaves at 31. This heating gas is preferably a portion of thegas material withdrawn from the main container after it has been heated.
When the pressure in the containers is not above the desired normal, the valve 21 is opened sumciently to permit the discharge of liquefied gas at the desired rate through conduit 20 to the consuming apparatus, The path of flow of the liquefied gas is then up through the part of the conduit is thatfis inside oi the inner vessel ll,
thence out through conduit 16 and through the portion of conduit 16 that is coiled around the inner vessel 18, and then out tothe conduit 2 through valve 21.
.In passing through the coiled part of conduit 16, the liquefied gas. removes heat from the ,in-'-' nor vessel 18 and surrounding insulation, thus keeping them substantially at the liquefied gas temperature. The purpose of thus adding reirigeration to the inner vessel is to reduce the rate of heat leak into the inner vessel from exing valve 21 and opening sufilciently the valve 23 in the conduit 22 which provides communication between the bottom of inner vessel 18 and the withdrawal conduit 20.
The reserve of liquefied gas in the auxiliary container B is preferably suificient to allow time for the removal of the exhausted container A andvits replacement by a similar charged container. If the pressure of the gas material in the new main container is below the desired normal, a pressure increase may be obtained by evaporation of sufiicient liquefied gas by the introduction of warm gas through the heating conduit in the auxiliary container.
accuses It will be seen that the provision of the auxiliary container, permits a continuous supply of gas material to the consuming apparatus without requiring the simultaneous presence or two or more main containers at the place of discharge.
The cost of manufacture of the auxiliary c'ontainer is materially less than the cost of manufacture of the main container, which results in a substantial advantage to the practice oi the method of the invention.
It will also be seen that the auxiliary container serves as a means for vaporizing some of the liquefied gas for the purpose of increasing the pressure of the system. Another advantage of this method is that the heating of the main body of liquefied gas in the main container, formerly accomplished by means of a heating coil placed in the inner vessel oi the main container, is avoided.
Since certainchanges in carrying out the above process and in the constructions set forth, which embody the invention may be made without departing from its scope, it is intended that all mattercontained in the above description. or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.
Having described my invention, what I claim as new and. desire to secure by Letters Patent, is:
l. A method for dispensing gas material which comprises providing a body of liquefied gas in a main container at a place of consumption, providing an additional body of gas in an auxiliary container permanently installed at the place of consumption and arranged to be supplied from the main container, increasing the pressure in both containers by evaporating a portion of the liquefied gas in said auxiliary container, supplying the demand for gas material at true place of consumption directly from said main body of gas until exhausted, and during the recharging interim supplying the demand directly from said auxiliary body of gas.
2. A method-for dispensing gas material which comprises providing a mobile main body oi liquefied gas which may be transported to and from the place of consumption, providing an additional body of liquefied gas in an auxiliary container permanently installed at the place of consumption and arranged to be supplied from said main container, increasing the pressure in both containers by evaporating a portion of the liq efied gas in said auxiliary container, supplying he demand for gas materialv directly from said main container until the body of liquid therein is exhausted, and thereafter supplying the demand for gas material directly from said additional body during the interim until the main body oi liquefied gas is renewed.
3. A method for dispensing gas material which comprises charging liquefied gas into a main container for liquefied gases, transferring a portion of said liquefied gas into an auxiliary container connected with said main container, discharging gas material from both said containers such that liquefied gas is first substantially exhausted from said main container, increasing the pressure in both containers to a de-' sired value by evaporating a portion of the liquefied gas within said auxiliary container, refrigerating the contents of said auxiliary container with transfer of heat to eflluent' gas material from said main container, and recharging said main container while continuing discharge of gas material from said auxiliary container.
4. A method for dispensing gas material which comprises transporting to destination liquefied gas in a portable container for liquefied gases, connectingsaid portable container with an auxiliary container and with apparatus for receiving and consuming gas material, transferring a portion of the liquefied gas from said portable container into said auxiliary container, discharging gas material from both said containers such that liquefied gas is first substantially exhausted from the portable container, increasing the pressure in both containers to the desired value by evaporating a portion of the liquefied gas within said auxiliary container, refrigerating the contents of said auxiliary container with transier of heat to eiiluent gas material from said portable container, and replacing said portable container with another similar portable container charged with gas material while continuing discharge of gas material from said auxiliary container.
5. In apparatus for dispensing gas material, the combination comprising a main container for liquefied gas, a separate auxiliary container located at a distance from said main container and having connections for being filled from said main container, and discharge connections from each container having a common conduit leading to consuming apparatus forsupplying a .demand for gas material; said connections having control means whereby the demand for gas material is supplied selectively from said main container and from said auxiliary container.
6. In apparatus for dispensing-gas material, the combination comprising a portable main con tainer for liquefied gas, a separate auxiliary container having detachable connections with said main container whereby the same is filled from said main container, withdrawal connections leading from said auxiliary container to consuming apparatus, and detachable withdrawal connections detachably connected to said main container communicating with said first-named withdrawal connections and provided with control means whereby the demand for gas material may be supplied selectively from said main container and from said auxiliary container.
7. In apparatus for dispensing gas material, the combination comprising a main container for liquefied gas, an auxiliary container having a filling'connection leading from the bottom of said main container, gas and liquid phase withdrawal connections leading from said main container, said liquid phase withdrawal connection having a portion arranged to be in heat exchanging relation with the body of liquid in said auxiliary container, and branch connections leading from said auxiliary container to said gas and liquid phase withdrawal connections.
8. In apparatus for dispensing gas material, the combination comprising a main container for liquefied gas, an auxiliary container having a fill- 100 ing connection leading from the bottom of said main container, gas and liquid phase withdrawal connections leading from said main container, said liquid phase withdrawal connections having a portion arranged to be in heat exchanging rela- 105 tion with the body of liquid in said auxiliary container, branch connections leading from said auxiliary container to said gas and liquid phase withdrawal connections, and a heating element associated with said auxiliary container.
HARRY n. EDWARDS.
its
US61250232 1932-05-20 1932-05-20 Method and apparatus for dispensing gas material Expired - Lifetime US1953533A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2479070A (en) * 1943-06-19 1949-08-16 Linde Air Prod Co Apparatus for and method of dispensing liquefied gases
US2499404A (en) * 1946-06-08 1950-03-07 Specialties Dev Corp Liquefied gas storage and supply
US2576985A (en) * 1946-02-05 1951-12-04 William A Wildhack Liquid oxygen converter
US3263433A (en) * 1958-12-11 1966-08-02 Normalair Ltd Oxygen supply systems
US3264833A (en) * 1959-10-06 1966-08-09 Air Liquide Storing and dispensing ozone
US6658863B2 (en) * 2001-05-22 2003-12-09 Lockheed Martin Corporation Airborne gas storage and supply system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2479070A (en) * 1943-06-19 1949-08-16 Linde Air Prod Co Apparatus for and method of dispensing liquefied gases
US2576985A (en) * 1946-02-05 1951-12-04 William A Wildhack Liquid oxygen converter
US2499404A (en) * 1946-06-08 1950-03-07 Specialties Dev Corp Liquefied gas storage and supply
US3263433A (en) * 1958-12-11 1966-08-02 Normalair Ltd Oxygen supply systems
US3264833A (en) * 1959-10-06 1966-08-09 Air Liquide Storing and dispensing ozone
US6658863B2 (en) * 2001-05-22 2003-12-09 Lockheed Martin Corporation Airborne gas storage and supply system

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Publication number Publication date
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