EP0559144A2 - Procédé et appareil pour le chauffage au gaz d'un four à cuisson de l'industrie céramique - Google Patents

Procédé et appareil pour le chauffage au gaz d'un four à cuisson de l'industrie céramique Download PDF

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Publication number
EP0559144A2
EP0559144A2 EP93103297A EP93103297A EP0559144A2 EP 0559144 A2 EP0559144 A2 EP 0559144A2 EP 93103297 A EP93103297 A EP 93103297A EP 93103297 A EP93103297 A EP 93103297A EP 0559144 A2 EP0559144 A2 EP 0559144A2
Authority
EP
European Patent Office
Prior art keywords
burner
mixture
gas
burners
group
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.)
Granted
Application number
EP93103297A
Other languages
German (de)
English (en)
Other versions
EP0559144B1 (fr
EP0559144A3 (en
Inventor
Max Bacher
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.)
Bacher & Schmidt GmbH
Original Assignee
Bacher & Schmidt GmbH
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 Bacher & Schmidt GmbH filed Critical Bacher & Schmidt GmbH
Publication of EP0559144A2 publication Critical patent/EP0559144A2/fr
Publication of EP0559144A3 publication Critical patent/EP0559144A3/de
Application granted granted Critical
Publication of EP0559144B1 publication Critical patent/EP0559144B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F23K5/005—Gaseous fuel from a central source to a plurality of burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/36—Arrangements of heating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/40—Arrangements of controlling or monitoring devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D19/00—Arrangements of controlling devices

Definitions

  • the invention relates to a method for gas firing according to the preamble of patent claim 1 and a device for carrying out gas firing according to the preamble of patent claim 12.
  • the firing zone or high-temperature zone has hitherto usually been equipped either with so-called clean gas pulse burners or with so-called primary air burners.
  • the clean gas pulse burners work without air.
  • the gas is blown into the kiln in short pulses.
  • it is disadvantageous that such clean gas pulse burners only prove themselves under certain operating conditions. For high ovens or such at high flow speeds, there is a risk that the pulse flames will be deflected by the prevailing flow and will therefore no longer cover the full height or width of the stack of items to be burned. This results in undesirable temperature differences across the cross section of the combustion chamber.
  • Primary air burner With the primary air burner, an air flow is blown in separately at each burner at the same time as the gas. This air flow must be of sufficient mass to carry the gas with it when it leaves the burner and to give the flame a long range.
  • Primary air burners are preferably used in furnaces with a very high combustion output and a high flow rate.
  • a disadvantage of such primary air burners is their relatively complex structure.
  • the primary air burners have burner lances that consist of an outer tube for air and an inner tube for gas.
  • Both pipes have to be made of a highly refractory special steel because the tip of the lance has to be only a few centimeters in front of the combustion chamber, in which temperatures of 800 ° C to 1100 ° C occur.
  • the pipes are also subject to heavy wear due to the often very corrosive furnace atmosphere. Pipes made of corrosion-resistant ceramics, such as silicon carbide, can hardly be used, since the necessary structural details such as nozzles, swirl vanes, centering can only be achieved with very high costs, in particular mold costs.
  • a disadvantage of the previously known constructions is also the outlay in terms of equipment because separate lines, hoses, couplings, regulating elements, etc. are required for gas and air.
  • the invention has for its object to develop a method and an apparatus of the type mentioned in such a way that the gas firing can be carried out with less design effort compared to the known prior art.
  • gas firing can be implemented with a comparatively significantly lower design and manufacturing outlay.
  • the method and the device according to the invention advantageously enable the use of simple ceramic tubes without special shapes, as a result of which high wear resistance can be achieved inexpensively.
  • the gas / primary air mixing ratio is advantageously chosen so that no ignitable mixture is formed, the amount of air in any case being considerably below the amount required for stoichiometric combustion.
  • the mixture of gas and primary air can, according to a preferred embodiment of the invention, by any burner or each Burner group, which consists of about six to twenty burners, are formed separately.
  • the mixture can also be formed centrally for all burners or burner groups, the non-ignitable mixture being fed to the individual burners or burner groups in a safety-advantageous manner via a single distributor line.
  • the mixture provided before being fed to the burner or burners takes place in a pressure-tight mixing vessel, from which the mixture flows via a line to the or to the burners, actuators still being attached in this line.
  • the mixing device is preferably controllable in order to set and maintain the required mixture ratios.
  • the mixture is supplied by pulsed blowing, the frequency and the length of the blowing pulses being preferably controlled.
  • the gas firing can be adapted well to the respective needs, with further optimization of the gas firing being achievable according to a further embodiment if burners with at least one burner group or for burner groups with different burners are subjected to a cyclical burner application with mixture pulses.
  • the method according to the invention and the device according to the invention also advantageously enable the gas firing to be adapted regionally with respect to the combustion material, in which the lower region of a combustion material with the long flames and the The upper part of the material to be burned is heated with short flames, and according to an advantageous development of the invention, burners with long flames and burners with short flames, which are present in at least one burner group, can alternately be supplied with the mixture.
  • the height of the fire or the temperature distribution over the height of the material to be fired or trimmings can also preferably be influenced by adjusting the operating time of the gas firing.
  • At least one actuator is provided for the respective control of the pulsed injection, and preferably corresponding actuators can also be provided for controlling the length, shape and / or temperature of the flames for each burner or each burner group.
  • each burner has an injection tube consisting predominantly of ceramic material, and that a simple device for swirling and / or deflection is preferably provided for each injected mixture jet on each burner.
  • the primary air burner group outlined in Fig. 1 consists of a total of ten burners 7, for which a mixture preparation in mixing vessels 12 is provided, to each of which primary air via a line 2 and a distributor pipe 4 and gas or fuel gas via a line 1 and a gas distributor pipe 11 and Branches 13 are supplied.
  • the mixing vessel 12 which can be regulated in a manner not shown, the mixture is fed to the burners 7 via intermediate lines 6 via actuators 5.
  • the burner 7 consists, in a simple manner, as shown in FIG. 3, of an injection tube 8, which mainly consists of ceramic material and has an outlet opening 9, from which the mixture for gas firing is blown into a furnace 10. In a manner not shown, this blowing can be done in pulses, whereby according to the features mentioned above, the frequency and the length of the blowing pulses can also be controlled in a manner not shown, as can the sequence and the flame design and its area of use.
  • the alternative embodiment of a primary air burner according to FIG. 2 has, instead of individual mixing vessels 12 arranged in front of each burner 7, a central mixing vessel 3 to which primary air is fed via a line 2 and fuel gas via a line 1 without the interposition of actuators, not shown.
  • the mixing vessel 3 as well as the control elements (not shown) for this purpose and the control elements 5 can, as mentioned above, be controlled in a manner not shown in order to enable individual regulation of the mixture quantity of each individual burner 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Furnace Details (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Regulation And Control Of Combustion (AREA)
EP93103297A 1992-03-04 1993-03-02 Procédé et appareil pour le chauffage au gaz d'un four à cuisson de l'industrie céramique Expired - Lifetime EP0559144B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT411/92 1992-03-04
AT41192 1992-03-04

Publications (3)

Publication Number Publication Date
EP0559144A2 true EP0559144A2 (fr) 1993-09-08
EP0559144A3 EP0559144A3 (en) 1993-12-22
EP0559144B1 EP0559144B1 (fr) 1997-01-08

Family

ID=3489914

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93103297A Expired - Lifetime EP0559144B1 (fr) 1992-03-04 1993-03-02 Procédé et appareil pour le chauffage au gaz d'un four à cuisson de l'industrie céramique

Country Status (4)

Country Link
EP (1) EP0559144B1 (fr)
AT (1) ATE147496T1 (fr)
DE (1) DE59305014D1 (fr)
ES (1) ES2096785T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0757307A2 (fr) * 1995-08-01 1997-02-05 Flynn Controls B.V. Dispositif pour réguler la température dans un four

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2629754A1 (de) * 1976-07-02 1978-01-12 Immanuel Jeschke Gasbrenner fuer industrieoefen
EP0134907A1 (fr) * 1983-07-04 1985-03-27 Wolfgang Dr.-Ing. Leisenberg Dispositif pour l'amenée d'un milieu gazeux sous forme d'impulsion dans un four de calcination, etc.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2629754A1 (de) * 1976-07-02 1978-01-12 Immanuel Jeschke Gasbrenner fuer industrieoefen
EP0134907A1 (fr) * 1983-07-04 1985-03-27 Wolfgang Dr.-Ing. Leisenberg Dispositif pour l'amenée d'un milieu gazeux sous forme d'impulsion dans un four de calcination, etc.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0757307A2 (fr) * 1995-08-01 1997-02-05 Flynn Controls B.V. Dispositif pour réguler la température dans un four
EP0757307A3 (fr) * 1995-08-01 1997-04-23 Flynn Controls B V Dispositif pour réguler la température dans un four

Also Published As

Publication number Publication date
ATE147496T1 (de) 1997-01-15
DE59305014D1 (de) 1997-02-20
ES2096785T3 (es) 1997-03-16
EP0559144B1 (fr) 1997-01-08
EP0559144A3 (en) 1993-12-22

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