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WO1997005075A1 - Method and device for fire-polishing glass - Google Patents

Method and device for fire-polishing glass Download PDF

Info

Publication number
WO1997005075A1
WO1997005075A1 PCT/EP1996/003153 EP9603153W WO9705075A1 WO 1997005075 A1 WO1997005075 A1 WO 1997005075A1 EP 9603153 W EP9603153 W EP 9603153W WO 9705075 A1 WO9705075 A1 WO 9705075A1
Authority
WO
WIPO (PCT)
Prior art keywords
acetylene
fuel gas
burner
fire
polishing glass
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.)
Ceased
Application number
PCT/EP1996/003153
Other languages
German (de)
French (fr)
Inventor
Kamill GÖPP
Berthold PASSLICK
Herbert STÜRMANN
Johannes Nahen
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.)
Linde Sverige AB
Original Assignee
AGA AB
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 AGA AB filed Critical AGA AB
Priority to BR9610101A priority Critical patent/BR9610101A/en
Priority to SK95-98A priority patent/SK9598A3/en
Priority to EP96926359A priority patent/EP0842126A1/en
Publication of WO1997005075A1 publication Critical patent/WO1997005075A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K5/00—Feeding or distributing other fuel to combustion apparatus
    • F23K5/002—Gaseous fuel
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B29/00—Reheating glass products for softening or fusing their surfaces; Fire-polishing; Fusing of margins

Definitions

  • Fuel gas-oxygen lambs are used for this purpose, which are produced by external-mixing burners, natural gas, ethane, propane, butane, town gas or similar gases which contain no or a negligible proportion of acetylene being used as the fuel gas.
  • Acetylene is not used for fire polishing of glass because its flame damages the glass; depending on the setting, it is either too hot or contains a portion of free carbon that penetrates into the glass surface and discolors it.
  • the result of fire polishing in particular in the case of articles with a deeply structured surface, can be improved by using a fuel gas which to a lesser extent consists of acetylene which is mixed with the other fuel gas .
  • the acetylene content is below 50%, preferably also below 30%, more preferably between 10 to 25%.
  • the acetylene component produces a luminous flame in which the carbon released when the acetylene decomposes emits intensive heat radiation which, in addition to convection, improves the heat transfer to the surface to be treated, in particular also in the depths of the surface structure. Surprisingly, it has been shown that the carbon content in the flame does not adversely affect the glass surface. area leads. This may be related to the fact that the acetylene is so diluted by the remaining, multi-bond-free fuel gas that the carbon particles burn faster than is the case in a pure or more enriched acetylene flame in which the carbon particles tend to soot coagulation.
  • the fuel gas according to the invention is expediently produced in or immediately upstream of the burner as a mixture of a substantially acetylene-free fuel gas, for example as has previously been used for fire polishing, and acetylene.
  • a burner arrangement according to the invention expediently has a connection for the supply of acetylene in addition to the connection for conventional fuel gas and for oxygen, the fuel gas connection and the acetylene connection leading to a mixing device from which The burner opening or burner openings are fed here.
  • Oxygen is supplied to the burner 1, which can be of a conventional, external-mixing design, via a line 2 with a manual regulating valve and pressure reducer 4. Furthermore, the burner 1 has a fuel gas connection 5, which is connected to a backstop 6 is connected to a mixing device 7. On the one hand, this is fed with natural gas via a line 8 which contains a manual regulating valve 9 and a pressure reducer 10. On the other hand, it is fed with acetylene via a line 11, which contains a withdrawal safety device 12, a quantity indicator 13, a manual regulating valve 14 and a pressure reducer 15.
  • the mixing device 7 is designed as a Venturi mixer. However, other mixing devices can also be used which allow the acetylene to be mixed sufficiently uniformly into the remaining fuel gas.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Glass Compositions (AREA)

Abstract

Proposed is a method for fire-polishing glass using a burnable gas-oxygen flame, the method being characterized in that the burnable gas contains between 10 and 50 % by vol. of acetylene. The combustion gas may be formed by mixing normal, essentially acetylene-free, combustion gas with acetylene. The device for carrying out the method has a burner in which the gases pass through a mixer before reaching the nozzles, the mixer being connected up to separate burnable gas and acetylene feeds.

Description

Verfahren und Anordnung zum Feuerpolieren von Glas,Method and arrangement for fire polishing glass,

Zum Feuerpolieren von Glasgegenständen setzt man diese, solange sie noch warm sind, oberflächlich einer Gasflamme aus, durch die eine dünne Oberflächenschicht erweicht wird und sich daher ver¬ gleichmäßigen kann. Man verwendet dafür Brenngas-Sauerstoff- lammen, die von außenmischenden Brennern erzeugt werden, wobei als Brenngas vornehmlich Erdgas, Ethan, Propan, Butan, Stadtgas oder dergleichen Gase verwendet werden, die keinen oder einen vernachlässigbaren Anteil an Acetylen enthalten. Acetylen wird für das Feuerpolieren von Glas nicht verwendet, weil seine Flam¬ me dem Glas schadet; je nach Einstellung ist sie entweder zu heiß oder sie enthält einen in die Glasoberfläche eindringenden und sie verfärbenden Anteil an freiem Kohlenstoff.To fire-polish glass objects, they are exposed to a gas flame on the surface while they are still warm, through which a thin surface layer is softened and can therefore be uniform. Fuel gas-oxygen lambs are used for this purpose, which are produced by external-mixing burners, natural gas, ethane, propane, butane, town gas or similar gases which contain no or a negligible proportion of acetylene being used as the fuel gas. Acetylene is not used for fire polishing of glass because its flame damages the glass; depending on the setting, it is either too hot or contains a portion of free carbon that penetrates into the glass surface and discolors it.

Erfindungsgemäß wurde gefunden, daß das Ergebnis des Feuerpo¬ lierens, insbesondere bei Artikeln mit tief strukturierter Ober¬ fläche, dadurch verbessert werden kann, daß ein Brenngas verwen¬ det wird, das zum geringerem Teil aus Acetylen besteht, das mit dem übrigen Brenngas vermischt ist. Der Acetylenanteil liegt un¬ ter 50%, vorzugsweise auch unter 30%, weiter vorzugsweise zwi¬ schen 10 bis 25%.According to the invention, it was found that the result of fire polishing, in particular in the case of articles with a deeply structured surface, can be improved by using a fuel gas which to a lesser extent consists of acetylene which is mixed with the other fuel gas . The acetylene content is below 50%, preferably also below 30%, more preferably between 10 to 25%.

Der Acetylenanteil ergibt eine leuchtende Flamme, in der der beim Zerfall des Acetylens freiwerdende Kohlenstoff eine inten¬ sive Wärmestrahlung aussendet, die zusätzlich zur Konvektion die Wärmeübertragung auf die zu behandelnde Oberfläche verbessert, insbesondere auch in den Tiefen der Oberflächenstruktur. Überra¬ schenderweise hat sich gezeigt, daß der Kohlenstoffanteil in der Flamme nicht zu einer nachteiligen Beeinflussung der Glasober- fläche führt. Dies dürfte damit zusammenhängen, daß das Acetylen durch das übrige, mehrfachbindungsfreie Brenngas so stark ver¬ dünnt ist, daß die Kohlenstoffpartikeln rascher verbrennen, als dies in einer reinen oder stärker angereichten Acetylenflamme der Fall ist, in welcher die Kohlenstoffpartikeln zur Rußkoagu¬ lation neigen.The acetylene component produces a luminous flame in which the carbon released when the acetylene decomposes emits intensive heat radiation which, in addition to convection, improves the heat transfer to the surface to be treated, in particular also in the depths of the surface structure. Surprisingly, it has been shown that the carbon content in the flame does not adversely affect the glass surface. area leads. This may be related to the fact that the acetylene is so diluted by the remaining, multi-bond-free fuel gas that the carbon particles burn faster than is the case in a pure or more enriched acetylene flame in which the carbon particles tend to soot coagulation.

Das erfindungsgemäße Brenngas wird zweckmäßigerweise im oder un¬ mittelbar vor dem Brenner als Gemisch eines im wesentlichen ace¬ tylenfreien Brenngases, beispielsweise wie man es auch bisher für das Feuerpolieren verwendet hat, und Acetylen hergestellt.The fuel gas according to the invention is expediently produced in or immediately upstream of the burner as a mixture of a substantially acetylene-free fuel gas, for example as has previously been used for fire polishing, and acetylene.

Wenn das Gemisch erst am Verwendungsort hergestellt wird, weist eine erfindungsgemäße Brenneranordnung zweckmäßigerweise zusätz¬ lich zu dem Anschluß für übliches Brenngas und für Sauerstoff einen Anschluß für die Zufuhr von Acetylen auf, wobei der Brenn¬ gasanschluß und der Acetylenanschluß zu einer Mischeinrichtung führen, von der her die Brenneröffnung bzw. Brenneröffnungen ge¬ speist werden.If the mixture is only produced at the place of use, a burner arrangement according to the invention expediently has a connection for the supply of acetylene in addition to the connection for conventional fuel gas and for oxygen, the fuel gas connection and the acetylene connection leading to a mixing device from which The burner opening or burner openings are fed here.

Bei Verwendung eines außenmischenden Brenners, wie er übli¬ cherweise für das Feuerpolieren verwendet wird, ergibt sich eine sehr heiße Flamme von mehr als 2000°C. Sie läßt sich sehr gut unter- und überstöchiometrisch fahren. Die Intensität des Strah¬ lungsanteils an der Wärmeübertragung läßt sich durch Variation des Acetylenanteils variieren, wobei das je nach Verwendungsfall geeignetste Mischungsverhältnis durch Versuch leicht ermittelt werden kann.When using an external-mixing burner, as is usually used for fire polishing, a very hot flame of more than 2000 ° C. results. It can be driven very well under and over stoichiometric. The intensity of the radiation component in the heat transfer can be varied by varying the proportion of acetylene, the most suitable mixing ratio depending on the application being easily determined by experiment.

Die Erfindung wird im folgenden näher unter Bezugnahme auf die Zeichnung erläutert, die ein vorteilhaftes Ausführungsbeispiel einer Feuerpolieranordnung in einer schematischen Darstellung zeigt.The invention is explained in more detail below with reference to the drawing, which shows an advantageous embodiment of a fire polishing arrangement in a schematic representation.

Dem Brenner 1, der von üblicher, außenmischender Bauweise sein kann, wird über eine Leitung 2 mit Handregulierventil und Druck¬ minderer 4 Sauerstoff zugeführt. Ferner weist der Brenner 1 ei¬ nen Brenngasanschluß 5 auf, der über eine Rücktrittsicherung 6 an eine Mischeinrichtung 7 angeschlossen ist. Diese wird einer¬ seits über eine Leitung 8, die ein Handregulierventil 9 und ei¬ nen Druckminderer 10 enthält, mit Erdgas gespeist. Andererseits wird sie über eine Leitung 11, die eine Rücktrittsicherung 12, einen Mengenanzeiger 13, ein Handregulierventil 14 und einen Druckminderer 15 enthält, mit Acetylen gespeist. Die Mischein¬ richtung 7 ist im dargestellten Fall als Venturimischer ausge¬ führt. Jedoch können auch andere Mischeinrichtungen Verwendung finden, die eine hinreichend gleichmäßige Einmischung des Acety- lens in das übrige Brenngas ermöglichen.Oxygen is supplied to the burner 1, which can be of a conventional, external-mixing design, via a line 2 with a manual regulating valve and pressure reducer 4. Furthermore, the burner 1 has a fuel gas connection 5, which is connected to a backstop 6 is connected to a mixing device 7. On the one hand, this is fed with natural gas via a line 8 which contains a manual regulating valve 9 and a pressure reducer 10. On the other hand, it is fed with acetylene via a line 11, which contains a withdrawal safety device 12, a quantity indicator 13, a manual regulating valve 14 and a pressure reducer 15. In the illustrated case, the mixing device 7 is designed as a Venturi mixer. However, other mixing devices can also be used which allow the acetylene to be mixed sufficiently uniformly into the remaining fuel gas.

In einem gegebenen Beispiel wurden gute Ergebnisse erzielt in einem Verfahren, in welchem dem Brenner 5 m /h Erdgas von 0,5 bar Überdruck im Gemisch mit 0,5 bis 1,5 m3/h Acetylen gleichfalls von 0,5 bar Überdruck zugeführt wurde. In a given example, good results have been obtained in a process in which the burner is fed 5 m / h of natural gas of 0.5 bar gauge pressure in a mixture with 0.5 to 1.5 m 3 / h acetylene and 0.5 bar gauge pressure as well has been.

Claims

Patentansprüche claims 1. Verfahren zum Feuerpolieren von Glas mittels einer Brenngas- Sauerstoff-Flamme, dadurch gekennzeichnet, daß das Brenngas einen unter 50 Vol.-% liegenden Anteil an Acetylen enthält.1. A method for fire polishing glass by means of a fuel gas-oxygen flame, characterized in that the fuel gas contains less than 50% by volume of acetylene. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Brenngas als Gemisch eines im wesentlichen acetylenfreien Brenngases mit Acetylen gebildet wird.2. The method according to claim 1, characterized in that the fuel gas is formed as a mixture of a substantially acetylene-free fuel gas with acetylene. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Acetylenanteil unter 30 Vol.-% liegt.3. The method according to claim 1 or 2, characterized in that the proportion of acetylene is below 30 vol .-%. 4. Anordnung zum Feuerpolieren von Glas mit einem Brenner (1) , einem Brenngasanschluß (8) und einem Sauerstoffanschluß (2), dadurch gekennzeichnet, daß sie mit einem mit einer Acety- lenquelle verbindbaren Anschluß (11) versehen ist, der eben¬ so wie der Brenngasanschluß zu einer an dem Brenner (1) an¬ geschlossenen Mischeinrichtung (7) führt. 4. Arrangement for fire polishing glass with a burner (1), a fuel gas connection (8) and an oxygen connection (2), characterized in that it is provided with a connection (11) which can be connected to an acetylene source, which is also the case how the fuel gas connection leads to a mixing device (7) connected to the burner (1).
PCT/EP1996/003153 1995-07-28 1996-07-17 Method and device for fire-polishing glass Ceased WO1997005075A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BR9610101A BR9610101A (en) 1995-07-28 1996-07-17 Process and device for polishing glass by fire
SK95-98A SK9598A3 (en) 1995-07-28 1996-07-17 Method and device for fire-polishing glass
EP96926359A EP0842126A1 (en) 1995-07-28 1996-07-17 Method and device for fire-polishing glass

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19527790A DE19527790A1 (en) 1995-07-28 1995-07-28 Method and arrangement for fire polishing glass
DE19527790.2 1995-07-28

Publications (1)

Publication Number Publication Date
WO1997005075A1 true WO1997005075A1 (en) 1997-02-13

Family

ID=7768122

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1996/003153 Ceased WO1997005075A1 (en) 1995-07-28 1996-07-17 Method and device for fire-polishing glass

Country Status (7)

Country Link
EP (1) EP0842126A1 (en)
BR (1) BR9610101A (en)
CZ (1) CZ4198A3 (en)
DE (1) DE19527790A1 (en)
PL (1) PL324695A1 (en)
SK (1) SK9598A3 (en)
WO (1) WO1997005075A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006061931B3 (en) * 2006-12-21 2008-04-17 Institut für Physikalische Hochtechnologie e.V. Production of synthetic, highly pure quartz glass with a less hydroxyl content comprises producing a separation gas flow between carrier gas stream and gaseous fuel stream and adding carbon-containing gas to gaseous fuel stream

Citations (12)

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Publication number Priority date Publication date Assignee Title
US1505340A (en) * 1920-01-05 1924-08-19 Carbo Oxygen Company Gaseous fuel
DE402697C (en) * 1923-05-12 1924-09-18 Uebersee Metall Akt Ges Process for operating devices that work with blown flames, such as plating guns, welding torches, etc.
GB215739A (en) * 1923-05-11 1925-02-19 Uebersee Metall Ag Method of operating apparatus working with blast flames
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
US1581441A (en) * 1923-06-02 1926-04-20 James R Rose Gaseous fuel
DE428654C (en) * 1924-02-28 1926-05-07 Deutsch Englische Quarzschmelz Process for melting quartz glass and other highly refractory materials
US1626739A (en) * 1924-03-26 1927-05-03 Graham Glass Company Method and apparatus for fire-finishing glass articles
GB570647A (en) * 1941-09-04 1945-07-17 Joseph William Hobbs Improvements in and relating to methods and apparatus for mixing and supplying gaseous fuels
GB630221A (en) * 1947-03-13 1949-10-07 Samuel Harry White Gaseous fuel mixtures
FR2037541A1 (en) * 1970-03-03 1970-12-31 Daum & Cie
EP0060769A1 (en) * 1981-03-16 1982-09-22 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Ternary combustible with acetylene content in the liquid and gaseous phases

Family Cites Families (5)

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DE866632C (en) * 1948-10-02 1953-02-12 Rudolf O Dipl-Ing Bracke Burner for acetylene or other gas-air mixtures for welding or heating workpieces
FR2551431B1 (en) * 1983-09-06 1986-08-22 Air Liquide PROCESS FOR POLISHING THE SURFACE OF GLASS ARTICLES
DE3400710A1 (en) * 1984-01-11 1985-07-18 Siemens AG, 1000 Berlin und 8000 München GAS BURNER FOR THE EXTERNAL HEATING OF GLASS BODIES
DD265455A1 (en) * 1987-04-16 1989-03-01 Lauscha Glaskunst Veb BURNER FOR HOLLOW GLASS PROCESSING
JPH07112931B2 (en) * 1991-11-22 1995-12-06 東洋ガラス株式会社 Method and device for strengthening inner surface of glass container

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1505340A (en) * 1920-01-05 1924-08-19 Carbo Oxygen Company Gaseous fuel
GB215739A (en) * 1923-05-11 1925-02-19 Uebersee Metall Ag Method of operating apparatus working with blast flames
DE402697C (en) * 1923-05-12 1924-09-18 Uebersee Metall Akt Ges Process for operating devices that work with blown flames, such as plating guns, welding torches, etc.
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
US1581441A (en) * 1923-06-02 1926-04-20 James R Rose Gaseous fuel
DE428654C (en) * 1924-02-28 1926-05-07 Deutsch Englische Quarzschmelz Process for melting quartz glass and other highly refractory materials
US1626739A (en) * 1924-03-26 1927-05-03 Graham Glass Company Method and apparatus for fire-finishing glass articles
GB570647A (en) * 1941-09-04 1945-07-17 Joseph William Hobbs Improvements in and relating to methods and apparatus for mixing and supplying gaseous fuels
GB630221A (en) * 1947-03-13 1949-10-07 Samuel Harry White Gaseous fuel mixtures
FR2037541A1 (en) * 1970-03-03 1970-12-31 Daum & Cie
EP0060769A1 (en) * 1981-03-16 1982-09-22 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Ternary combustible with acetylene content in the liquid and gaseous phases

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
A.G.PINCUS ET AL.: "Secondary Manufacturing in the Glass Industry", 1978, BOOKS FOR INDUSTRY AND THE GLASS INDUSTRY, N.Y., US, XP002017689 *
A.G.PINCUS ET AL.: "Secondary Manufacturing in the Glass Industry", 1978, BOOKS FOR INDUSTRY AND THE GLASS INDUSTRY, N.Y., US, XP002017690 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006061931B3 (en) * 2006-12-21 2008-04-17 Institut für Physikalische Hochtechnologie e.V. Production of synthetic, highly pure quartz glass with a less hydroxyl content comprises producing a separation gas flow between carrier gas stream and gaseous fuel stream and adding carbon-containing gas to gaseous fuel stream

Also Published As

Publication number Publication date
EP0842126A1 (en) 1998-05-20
DE19527790A1 (en) 1997-01-30
CZ4198A3 (en) 1998-06-17
BR9610101A (en) 1999-02-17
SK9598A3 (en) 1998-09-09
PL324695A1 (en) 1998-06-08

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