EP1194513B1 - Combustible gas mixture and use thereof in gas cutting operations - Google Patents

Combustible gas mixture and use thereof in gas cutting operations Download PDF

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Publication number
EP1194513B1
EP1194513B1 EP00925406A EP00925406A EP1194513B1 EP 1194513 B1 EP1194513 B1 EP 1194513B1 EP 00925406 A EP00925406 A EP 00925406A EP 00925406 A EP00925406 A EP 00925406A EP 1194513 B1 EP1194513 B1 EP 1194513B1
Authority
EP
European Patent Office
Prior art keywords
butane
gas mixture
gas
propane
proportion
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.)
Revoked
Application number
EP00925406A
Other languages
German (de)
French (fr)
Other versions
EP1194513A1 (en
Inventor
Joachim Grundmann
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
Air Liquide SA
LAir Liquide SA a Directoire et Conseil de Surveillance pour lEtude et lExploitation des Procedes Georges Claude
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Application filed by Air Liquide SA, LAir Liquide SA a Directoire et Conseil de Surveillance pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Publication of EP1194513A1 publication Critical patent/EP1194513A1/en
Application granted granted Critical
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
    • C10L3/02—Compositions containing acetylene

Definitions

  • the present invention relates to a gas mixture ternary containing controlled amounts of propane, butane and acetylene, usable in an operation flame cutting.
  • an oxygen cutting operation consists of cutting with a mixture of combustion of a sheet or the like of a material metallic containing a high proportion of iron, for example of steel.
  • gases or gas mixtures can be used as a combustible gas, then that we usually use oxygen or a mixture oxygen-rich gas as a fuel gas.
  • Fuel gas and fuel gas are mixed to each other to generate the gas mixture of combustion which feeds a burner, i.e. the nozzle a flame cutting torch for example.
  • the object of the present invention is therefore to try to to overcome the aforementioned problem, that is to say propose a combustible gas mixture usable in an oxygen cutting operation, which gas mixture leads at preheating times before cutting proper significantly lower than those obtained with mixtures gaseous conventionally used.
  • the butane is iso-butane, n-butane or a mixture of iso-butane and n-butane.
  • the ratio of the proportion of butane the proportion of propane is at least 0.25 of preferably 0.25 to 0.66, and / or the proportion of butane is less than or equal to the proportion of acetylene.
  • the proportion of acetylene is between 20 and 30%.
  • the invention also relates to a container, in particular a gas cylinder containing such a mixture ternary gas and the use of said gas mixture ternary in an oxygen cutting operation, as a gas fuel intended to be mixed in a proportion desired oxygen or a gas mixture containing oxygen, like air.
  • a combustion gas mixture by mixing desired proportions of a ternary gas mixture according to the invention and oxygen or a gas containing oxygen, preferably the combustion gas mixture is carried out in a gas mixer or directly in a nozzle or a burner.
  • gas mixtures ternaries according to the invention were used as combustible gas in an oxygen cutting operation of a metal sheet 20 mm thick.
  • the fuel gas used is oxygen.
  • the time was determined preheating, i.e. the time required for the effective preheating of the sheet to cut.
  • the ratio of the proportion of butane to that of propane is 0.66.
  • the ratio of the proportion of butane to that of propane is 0.43.
  • the ratio of the proportion of butane to that of propane is 0.25.

Abstract

The invention relates to a combustible ternary gas mixture and the use thereof as a combustible gas in a sheet-metal gas cutting operation. The inventive gas mixture contains 10 - 40 % acetylene, 10 - 50 % butane and 10 -80 % propane. According to the invention, the butane is iso-butane, n-butane or a mixture of said two compounds.

Description

La présente invention concerne un mélange gazeux ternaire contenant des quantités contrôlées de propane, de butane et d'acétylène, utilisable dans une opération d'oxycoupage.The present invention relates to a gas mixture ternary containing controlled amounts of propane, butane and acetylene, usable in an operation flame cutting.

De manière connue, une opération d'oxycoupage consiste à réaliser une découpe avec un mélange de combustion d'une tôle ou analogue en un matériau métallique contenant une forte proportion de fer, par exemple de l'acier.In known manner, an oxygen cutting operation consists of cutting with a mixture of combustion of a sheet or the like of a material metallic containing a high proportion of iron, for example of steel.

A cette fin, de nombreux gaz ou mélanges gazeux peuvent être utilisés en tant que gaz combustible, alors qu'on emploie usuellement de l'oxygène ou un mélange gazeux riche en oxygène en tant que gaz carburant.To this end, many gases or gas mixtures can be used as a combustible gas, then that we usually use oxygen or a mixture oxygen-rich gas as a fuel gas.

Le gaz combustible et le gaz carburant sont mélangés l'un à l'autre pour générer le mélange gazeux de combustion qui alimente un brûleur, c'est-à-dire la buse d'un chalumeau d'oxycoupage par exemple.Fuel gas and fuel gas are mixed to each other to generate the gas mixture of combustion which feeds a burner, i.e. the nozzle a flame cutting torch for example.

A titre d'exemple, on peut citer le document EP-A-895026 qui décrit un procédé d'oxycoupage mettant en oeuvre un gaz combustible choisi parmi le propane, le Crylène™. le Tétrène™ et l'acétylène et un gaz carburant choisi parmi l'oxygène et l'air.By way of example, mention may be made of document EP-A-895026 which describes an oxygen cutting process using uses a combustible gas chosen from propane, Crylene ™. Tetrene ™ and acetylene and a fuel gas chosen from oxygen and air.

Cependant, les mélanges gazeux combustibles existants conduisent à des temps de préchauffage de la tôle à couper relativement longs, c'est-à-dire pouvant atteindre 20 secondes et plus, ce qui n'est pas acceptable du point de vue industriel, car cela a un effet négatif sur la productivité.However, existing combustible gas mixtures lead to sheet metal preheating times at cut relatively long, i.e. up to 20 seconds or more, which is not acceptable from the point from an industrial point of view, as this has a negative effect on the productivity.

Le but de la présente invention est donc de tenter de pallier le problème susmentionné, c'est-à-dire de proposer un mélange gazeux combustible utilisable dans une opération d'oxycoupage, lequel mélange gazeux conduit à des temps de préchauffage avant coupage proprement dit nettement inférieurs à ceux obtenus avec les mélanges gazeux classiquement utilisés.The object of the present invention is therefore to try to to overcome the aforementioned problem, that is to say propose a combustible gas mixture usable in an oxygen cutting operation, which gas mixture leads at preheating times before cutting proper significantly lower than those obtained with mixtures gaseous conventionally used.

L'invention concerne alors un mélange gazeux ternaire combustible constitué de :

  • 10 à 40% d'acétylène
  • 10 à 50% de butane, et
  • 10 à 80% de propane
The invention therefore relates to a combustible ternary gas mixture consisting of:
  • 10 to 40% acetylene
  • 10 to 50% butane, and
  • 10 to 80% propane

De préférence, le mélange gazeux contient :

  • 15 à 30% d'acétylène
  • 14 à 43% de butane, et
  • 27 à 71% de propane
Preferably, the gas mixture contains:
  • 15 to 30% acetylene
  • 14 to 43% of butane, and
  • 27 to 71% propane

Préférentiellement, le mélange gazeux contient :

  • 20 à 30% d'acétylène
  • 14 à 40% de butane, et
  • 30 à 66% de propane
Preferably, the gas mixture contains:
  • 20 to 30% acetylene
  • 14 to 40% butane, and
  • 30 to 66% propane

Selon l'invention, le butane est de l'iso-butane, du n-butane ou un mélange d'iso-butane et de n-butane.According to the invention, the butane is iso-butane, n-butane or a mixture of iso-butane and n-butane.

De préférence, le rapport de la proportion de butane à la proportion de propane est d'au moins 0,25 de préférence de 0,25 à 0,66, et/ou la proportion de butane est inférieure ou égale à la proportion d'acétylène.Preferably, the ratio of the proportion of butane the proportion of propane is at least 0.25 of preferably 0.25 to 0.66, and / or the proportion of butane is less than or equal to the proportion of acetylene.

Avantageusement, la proportion d'acétylène est comprise entre 20 et 30%.Advantageously, the proportion of acetylene is between 20 and 30%.

L'invention concerne aussi un récipient, en particulier une bouteille de gaz contenant un tel mélange gazeux ternaire et l'utilisation dudit mélange gazeux ternaire dans une opération d'oxycoupage, en tant que gaz combustible destiné à être mélangé à une proportion souhaitée d'oxygène ou d'un mélange gazeux contenant de l'oxygène, tel l'air.The invention also relates to a container, in particular a gas cylinder containing such a mixture ternary gas and the use of said gas mixture ternary in an oxygen cutting operation, as a gas fuel intended to be mixed in a proportion desired oxygen or a gas mixture containing oxygen, like air.

De préférence, on réalise, sur site d'utilisation, un mélange gazeux de combustion en mélangeant des proportions désirées d'un mélange gazeux ternaire selon l'invention et d'oxygène ou d'un gaz contenant de l'oxygène, de préférence le mélange gazeux de combustion est réalisé dans un mélangeur de gaz ou directement dans une buse ou un brûleur.Preferably, on site of use, a combustion gas mixture by mixing desired proportions of a ternary gas mixture according to the invention and oxygen or a gas containing oxygen, preferably the combustion gas mixture is carried out in a gas mixer or directly in a nozzle or a burner.

L'invention va être mieux comprise à l'aide des exemples ci-après, donnés à titre illustratif mais non limitatif.The invention will be better understood using examples below, given by way of illustration but not limiting.

ExemplesExamples

Dans les exemples 1 à 3 ci-après, des mélanges gazeux ternaires selon l'invention ont été utilisés en tant que gaz combustible dans une opération d'oxycoupage d'une tôle métallique de 20 mm d'épaisseur.In Examples 1 to 3 below, gas mixtures ternaries according to the invention were used as combustible gas in an oxygen cutting operation of a metal sheet 20 mm thick.

Par ailleurs, le gaz carburant utilisé est de l'oxygène.In addition, the fuel gas used is oxygen.

Pour chaque mélange gazeux, on a déterminé le temps de préchauffage, c'est-à-dire la durée nécessaire à la réalisation d'un préchauffage efficace de la tôle à couper.For each gas mixture, the time was determined preheating, i.e. the time required for the effective preheating of the sheet to cut.

Ensuite, on a comparé le temps de préchauffage nécessaire lors de l'utilisation, en tant que gaz carburant, d'un mélange gazeux selon l'invention aux temps de préchauffage nécessaires lors de la mise en oeuvre, dans les mêmes conditions, de butane ou, selon le cas, de propane.Then we compared the warm-up time necessary during use, as a gas fuel, of a gaseous mixture according to the invention in warm-up time required when switching on works, under the same conditions, of butane or, depending on the case of propane.

Exemple 1 : Example 1 :

Le mélange gazeux ternaire contient :

  • 30% d'acétylène
  • 28% de butane
  • 42% de propane
The ternary gas mixture contains:
  • 30% acetylene
  • 28% butane
  • 42% propane

Le rapport de la proportion de butane à celle de propane est de 0,66. The ratio of the proportion of butane to that of propane is 0.66.

Les résultats obtenus montrent que la mise en oeuvre de ce mélange gazeux ternaire conduit à un gain de temps de préchauffage de 60% par rapport au butane et de 43% par rapport au propane.The results obtained show that the implementation of this ternary gas mixture saves time 60% preheating compared to butane and 43% compared to propane.

Exemple 2 : Example 2 :

Le mélange gazeux ternaire contient :

  • 25% d'acétylène
  • 22,5% de butane
  • solde de propane
The ternary gas mixture contains:
  • 25% acetylene
  • 22.5% butane
  • propane balance

Le rapport de la proportion de butane à celle de propane est de 0,43.The ratio of the proportion of butane to that of propane is 0.43.

Les résultats obtenus montrent que la mise en oeuvre de ce mélange gazeux ternaire conduit à un gain de temps de préchauffage de 65% par rapport au butane et de 45% par rapport au propane.The results obtained show that the implementation of this ternary gas mixture saves time 65% preheating compared to butane and 45% compared to propane.

Exemple 3 : Example 3 :

Le mélange gazeux ternaire contient :

  • 20% d'acétylène
  • 16% de butane
  • 64% de propane
The ternary gas mixture contains:
  • 20% acetylene
  • 16% butane
  • 64% propane

Le rapport de la proportion de butane à celle de propane est de 0,25.The ratio of the proportion of butane to that of propane is 0.25.

Les résultats obtenus montrent que la mise en oeuvre de ce mélange gazeux ternaire conduit à un gain de temps de préchauffage de 63% par rapport au butane et de 40% par rapport au propane.The results obtained show that the implementation of this ternary gas mixture saves time 63% preheating compared to butane and 40% compared to propane.

Au vu des exemples 1 à 3, il apparaít clairement qu'un mélange gazeux ternaire selon l'invention conduit à des résultats inattendus, à savoir des gains de 40 à 65% du temps de préchauffage, par rapport à l'utilisation de butane ou de propane en tant que gaz combustibles.In view of examples 1 to 3, it appears clearly that a ternary gas mixture according to the invention leads to unexpected results, i.e. gains of 40 to 65% warm-up time, compared to using butane or propane as combustible gas.

Claims (10)

  1. Combustible ternary gas mixture consisting of:
    10 to 40% acetylene;
    10 to 50% butane; and
    10 to 80% propane.
  2. Mixture according to Claim 1, characterized in that it consists of:
    15 to 30% acetylene;
    14 to 43% butane; and
    27 to 71% propane.
  3. Mixture according to either of Claims 1 and 2, characterized in that it consists of:
    20 to 30% acetylene;
    14 to 40% butane; and
    30 to 66% propane.
  4. Mixture according to one of Claims 1 to 3, characterized in that the butane is isobutane or n-butane, or a mixture of isobutane and n-butane.
  5. Mixture according to one of Claims 1 to 4, characterized in that the ratio of the proportion of butane to the proportion of propane is at least 0.25, preferably from 0.25 to 0.66, and/or in that the proportion of butane is less than or equal to the proportion of acetylene.
  6. Mixture according to one of Claims 1 to 5, characterized in that the proportion of acetylene is between 20 and 30%.
  7. Container, in particular a gas bottle, containing a ternary gas mixture according to one of Claims 1 to 6.
  8. Use of a ternary gas mixture according to one of Claims 1 to 6 as combustible gas mixture in an oxycutting operation.
  9. Use according to Claim 8, in which the ternary gas mixture according to one of Claims 1 to 6 is mixed with a desired proportion of oxygen or of a gas mixture containing oxygen.
  10. Use according to either of Claims 8 and 9, in which a combustion gas mixture is produced, on the site of use, by mixing desired proportions of a ternary gas mixture according to one of Claims 1 to 6 with oxygen or with a gas containing oxygen, the combustion gas mixture preferably being produced in a gas mixer or directly in a nozzle or a burner.
EP00925406A 1999-05-12 2000-05-05 Combustible gas mixture and use thereof in gas cutting operations Revoked EP1194513B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9906090 1999-05-12
FR9906090A FR2793494B1 (en) 1999-05-12 1999-05-12 COMBUSTIBLE GAS MIXTURE AND ITS OXYCOUPTING USAGE
PCT/FR2000/001228 WO2000070000A1 (en) 1999-05-12 2000-05-05 Combustible gas mixture and use thereof in gas cutting operations

Publications (2)

Publication Number Publication Date
EP1194513A1 EP1194513A1 (en) 2002-04-10
EP1194513B1 true EP1194513B1 (en) 2003-04-02

Family

ID=9545542

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Application Number Title Priority Date Filing Date
EP00925406A Revoked EP1194513B1 (en) 1999-05-12 2000-05-05 Combustible gas mixture and use thereof in gas cutting operations

Country Status (8)

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EP (1) EP1194513B1 (en)
AT (1) ATE236238T1 (en)
AU (1) AU4413900A (en)
CA (1) CA2373843A1 (en)
DE (1) DE60001950T2 (en)
ES (1) ES2195887T3 (en)
FR (1) FR2793494B1 (en)
WO (1) WO2000070000A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101139535B (en) * 2007-10-26 2010-12-08 周尧 Environment-protection energy-saving gas for welding and cutting
CN104877722B (en) * 2015-05-07 2017-05-10 沈阳安燃科技有限公司 Natural gas metal cutting gas

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE405319A (en) *
US1528765A (en) * 1923-05-28 1925-03-10 James R Rose Gaseous fuel
US1528766A (en) * 1923-05-28 1925-03-10 James R Rose Gaseous fuel
NL7103044A (en) * 1971-03-09 1972-09-12
CH569077A5 (en) * 1971-04-20 1975-11-14 Linde Ag
US3982883A (en) * 1973-11-23 1976-09-28 Etter Berwyn E Method of flame cutting
US4902539A (en) * 1987-10-21 1990-02-20 Union Carbide Corporation Fuel-oxidant mixture for detonation gun flame-plating
FR2766556B1 (en) * 1997-07-28 1999-09-03 Soudure Autogene Francaise METHOD AND DEVICE FOR SUPPRESSING EXPLANATION FROM A FLAME

Also Published As

Publication number Publication date
FR2793494B1 (en) 2005-02-18
DE60001950T2 (en) 2003-12-18
ES2195887T3 (en) 2003-12-16
ATE236238T1 (en) 2003-04-15
AU4413900A (en) 2000-12-05
DE60001950D1 (en) 2003-05-08
WO2000070000A1 (en) 2000-11-23
FR2793494A1 (en) 2000-11-17
CA2373843A1 (en) 2000-11-23
EP1194513A1 (en) 2002-04-10

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