EP0179710B1 - Procédé et appareil d'obtention d'un mélange de corps à bas points d'ébullition - Google Patents

Procédé et appareil d'obtention d'un mélange de corps à bas points d'ébullition Download PDF

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Publication number
EP0179710B1
EP0179710B1 EP85401988A EP85401988A EP0179710B1 EP 0179710 B1 EP0179710 B1 EP 0179710B1 EP 85401988 A EP85401988 A EP 85401988A EP 85401988 A EP85401988 A EP 85401988A EP 0179710 B1 EP0179710 B1 EP 0179710B1
Authority
EP
European Patent Office
Prior art keywords
reservoir
liquid
conduit
indirect heat
volatile liquid
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.)
Expired
Application number
EP85401988A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0179710A1 (fr
Inventor
Pierre Delacour
Alain Prost
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.)
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
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 LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Priority to AT85401988T priority Critical patent/ATE34087T1/de
Publication of EP0179710A1 publication Critical patent/EP0179710A1/fr
Application granted granted Critical
Publication of EP0179710B1 publication Critical patent/EP0179710B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/40—Mixing liquids with liquids; Emulsifying
    • B01F23/49—Mixing systems, i.e. flow charts or diagrams

Definitions

  • the present invention relates to the production of mixtures of bodies with low boiling points having different volatilities. It applies in particular to the production of air reconstituted from liquid oxygen and liquid nitrogen.
  • the invention relates more specifically to a method and an apparatus for supplying a mixture with a determined composition of low boiling bodies having different volatilities, of the type described in the preamble of claims 1 and 5 respectively.
  • FR-A-2 133 330 has also proposed a method and an apparatus of the type indicated above.
  • the sub-cooling is carried out by a refrigerating unit, which makes the apparatus complex and does not favor in nothing mixing.
  • the object of the invention is to provide a more reliable and more economical technique for producing such mixtures. To this end, it relates to a method and an apparatus of the aforementioned type, which are distinguished by the content of the characterizing part of claims 1 and 5 respectively.
  • the apparatus illustrated in the drawing is intended to produce reconstituted air. It essentially comprises a container 1 A for storing liquid nitrogen, a container 1 B for storing liquid oxygen, and a mixing tank 2 supported by a rocker 3.
  • a respective line 4A, 4B starts from the bottom of each container 1 A, 1 B, is equipped with a solenoid valve 5A, 5B and enters the lower part of the tank 2.
  • the line 4A ends at this location with a butt freely open, while the pipe 4B is connected to the inlet of a heat exchange coil 6 mounted in the lower part of the tank.
  • a vertical tube 7 extends from the outlet of the coil 5 to the upper region of the tank, where it is provided with a spray bar 8.
  • a bypass line 9 is tapped on the line 4A and includes an expansion solenoid valve 10. At the outlet thereof, the line 9 passes through a phase separator 11, then crosses the upper region of the tank 2 forming a condenser coil 12, and finally emerges from this tank by a vent 13.
  • the tank 2 is also equipped with a liquid withdrawal line 14 which starts from its bottom.
  • the device naturally includes the various conventional accessories in the technique of storing cryogenic liquids, for example a pressure rise heater 15A, 15B associated with each container 1 A, 1 B, and suitable means of thermal insulation (not represented).
  • a pressure rise heater 15A, 15B associated with each container 1 A, 1 B, and suitable means of thermal insulation (not represented).
  • the apparatus thus described operates in the following manner.
  • Liquid is drawn off at any rate through line 14.
  • it can be compressed by means of a pump 16, passed through a vaporizer-heater 17 and use the gaseous air obtained to fill under pressure bottles 18, in particular for medical use of this air.
  • the withdrawn liquid could also be directly transferred to a suitable cryogenic container, not shown, for example in order to produce cold.
  • the valve 5A opens. Liquid nitrogen then passes through line 4A but, during a transient cooling phase, this nitrogen vaporizes and causes an increase in pressure in the tank 2.
  • the valve 10 s' open; the liquid nitrogen then passes through the line 9, expands in the valve 10 and travels through the coil 12 by partially recondensing the vapor phase contained in the tank. The pressure therefore decreases, and the filling with liquid nitrogen continues.
  • valve 5A closes and the valve 5B opens. Liquid oxygen is thus admitted into the coil 6 and sub-cools there substantially at the temperature of liquid nitrogen. Then the liquid oxygen rises in the tube 7 and falls in rain, by the ramp 8, on the liquid already contained in the tank.
  • the valve 5B closes and the drawing off of the liquid mixture can resume.
  • control means for carrying out the automatic operations described above.
  • control means are conventional and do not need to be described in more detail.
  • the sub-cooling of liquid oxygen with liquid nitrogen makes it possible to carry out the mixing under good conditions. In addition, it produces a local boil on the coil 6, which ensures efficient mixing of the mixture. Furthermore, the sub-cooled liquid oxygen falling as rain dissolves part of the nitrogen vapors produced during the previous filling phase, which further contributes to obtaining a homogeneous mixture.
  • the invention advantageously applies to the obtaining of any mixture of determined composition of two or more constituents with low boiling points having volatilities clearly different from each other.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
EP85401988A 1984-10-19 1985-10-14 Procédé et appareil d'obtention d'un mélange de corps à bas points d'ébullition Expired EP0179710B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85401988T ATE34087T1 (de) 1984-10-19 1985-10-14 Verfahren und vorrichtung zum erzeugen eines gemisches von substanzen mit niedrigen siedepunkten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8416015 1984-10-19
FR8416015A FR2571979B1 (fr) 1984-10-19 1984-10-19 Procede et appareil d'obtention d'un melange de corps a bas points d'ebullition.

Publications (2)

Publication Number Publication Date
EP0179710A1 EP0179710A1 (fr) 1986-04-30
EP0179710B1 true EP0179710B1 (fr) 1988-05-11

Family

ID=9308808

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85401988A Expired EP0179710B1 (fr) 1984-10-19 1985-10-14 Procédé et appareil d'obtention d'un mélange de corps à bas points d'ébullition

Country Status (10)

Country Link
US (1) US4718772A (xx)
EP (1) EP0179710B1 (xx)
JP (1) JPS6199800A (xx)
AT (1) ATE34087T1 (xx)
CA (1) CA1284097C (xx)
DE (1) DE3562562D1 (xx)
ES (1) ES8702161A1 (xx)
FR (1) FR2571979B1 (xx)
GR (1) GR852520B (xx)
PT (1) PT81331B (xx)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK0463265T3 (da) * 1990-06-26 1994-03-14 Air Liquide Fremgangsmåde og apparat til distribution af gasblandinger
US5367881A (en) * 1993-09-28 1994-11-29 Liquid Carbonic Corporation Cryogenic control of emission of solvent vapors from mixers
US5778678A (en) * 1996-11-20 1998-07-14 The Boc Group, Inc. Method and apparatus for producing liquid mixtures of oxygen and nitrogen
GB9716518D0 (en) * 1997-08-05 1997-10-08 Boc Group Plc Liquefied gas mixture
DE19754686A1 (de) * 1997-12-10 1999-06-17 Messer Griesheim Gmbh Verfahren und Vorrichtung zum Eintragen von Gas in eine Flüssigkeit
JP2005532899A (ja) * 2002-07-12 2005-11-04 ハネウェル・インターナショナル・インコーポレーテッド 移動中の流体のブレンドの分留を最小化するための方法および装置
FR2991195B1 (fr) * 2012-05-29 2014-08-01 Air Liquide Procede de fabrication d'un melange d'azote liquide et d'oxygene liquide dont les proportions sont proches de l'air liquide
FR3044071B1 (fr) * 2015-11-24 2018-05-11 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Procede et installation de stockage d'un melange gazeux liquefie, en particulier d'air liquefie

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB269661A (en) * 1926-01-21 1927-04-21 Otto Simonis Improvements in and connected with liquid air oxygenproducing plant
US2514463A (en) * 1948-10-25 1950-07-11 Jr George W Bayers Liquid carbonator
FR2133330A5 (xx) * 1971-04-16 1972-11-24 Oreal
DE2645219A1 (de) * 1976-10-07 1978-04-13 Messer Griesheim Gmbh Verfahren und vorrichtung zur herstellung eines gasgemisches

Also Published As

Publication number Publication date
PT81331B (pt) 1987-10-20
PT81331A (fr) 1985-11-01
DE3562562D1 (en) 1988-06-16
US4718772A (en) 1988-01-12
FR2571979B1 (fr) 1987-01-30
JPS6199800A (ja) 1986-05-17
GR852520B (xx) 1986-02-07
CA1284097C (fr) 1991-05-14
EP0179710A1 (fr) 1986-04-30
ATE34087T1 (de) 1988-05-15
FR2571979A1 (fr) 1986-04-25
ES8702161A1 (es) 1986-12-16
ES547995A0 (es) 1986-12-16

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