EP0368033A1 - Dispositif de réglage des brûleurs à gaz par impulsion d'un four tunnel - Google Patents

Dispositif de réglage des brûleurs à gaz par impulsion d'un four tunnel Download PDF

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Publication number
EP0368033A1
EP0368033A1 EP19890119189 EP89119189A EP0368033A1 EP 0368033 A1 EP0368033 A1 EP 0368033A1 EP 19890119189 EP19890119189 EP 19890119189 EP 89119189 A EP89119189 A EP 89119189A EP 0368033 A1 EP0368033 A1 EP 0368033A1
Authority
EP
European Patent Office
Prior art keywords
burner
gas
gas pulse
pulse
burners
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
EP19890119189
Other languages
German (de)
English (en)
Other versions
EP0368033B1 (fr
Inventor
Albert Dipl.-Ing. Tertilt
Werner Reekers
Helmut Dipl.-Ing. Lindemann
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.)
Keller GmbH
Original Assignee
Keller 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 Keller GmbH filed Critical Keller GmbH
Priority to AT89119189T priority Critical patent/ATE89396T1/de
Publication of EP0368033A1 publication Critical patent/EP0368033A1/fr
Application granted granted Critical
Publication of EP0368033B1 publication Critical patent/EP0368033B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0033—Heating elements or systems using 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 specially adapted for 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2205/00—Pulsating combustion
    • F23C2205/10—Pulsating combustion with pulsating fuel supply
    • 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
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0033—Heating elements or systems using burners
    • F27D2099/0043—Impulse burner
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
    • F27M2001/00—Composition, conformation or state of the charge
    • F27M2001/15—Composition, conformation or state of the charge characterised by the form of the articles
    • F27M2001/1504—Ceramic articles

Definitions

  • the invention relates to a device for controlling gas pulse burners of a tunnel furnace, according to the preamble of claim 1.
  • the kiln car stock requires, i.e. the material to be burned (kiln) stacked on a kiln car, which can be moved in cycles through a tunnel kiln, viewed in the kiln cross-section, partially different heat input in order ultimately to ensure uniform heating of all the ceramic moldings to be fired.
  • a device of the generic type has become known several times in practice - namely by a gas pulse burner control system with the switching unit of the "GI-12" type from the KELLER group of companies from D-4530 Ibbenbüren-Laggenbeck.
  • This known control device is designed in such a way that the gas is supplied in pulses to the combustion zone areas in which gas auto-ignition is ensured, and that the furnace cross section corresponds to that a "flame profile" (or “firing profile”) for each burner group as well as the burning duration, ie the time when the gas supply is switched on, can be set within each interval of the individual gas pulse burners.
  • "Flame profile” is understood to mean the curve in the furnace cross section on which the flames of all gas pulse burners used are during the burner group activation.
  • the gas pressure is adjustable.
  • a gas supply with low and high pressure can take place alternately, in which case (each) the gas pulse burner acts one time in the upper area of the trim and the other time in the lower area of the trim and thus a better temperature distribution over the cross-sectional height of the trim (the so-called . "Stocking height") is achieved.
  • the pulse time and interval time can be set independently of one another in the known gas pulse burner control, a correction of the pulse time is necessary when changing the interval time in order to obtain a certain "burner output".
  • the pulse time gas burner pulse time
  • the gas pulse burner is thus switched on 60 x 0.5 seconds per minute (i.e. in operation). If the interval / cycle time is set to 2 seconds, this results in 30 pulses per minute. 30 The or each gas pulse burner would then be switched on without changing the pulse time 30 x 0.5 sec., Which means a total of 15 sec.
  • the invention is therefore based on the object of providing an improved gas pulse burner control for tunnel furnaces which enables the required temperatures in the individual regions of the furnace cross section to be set in a simple and rapid manner and thereby ensures a non-reactive setting.
  • this is achieved by a gas pulse burner control with a microprocessor that enables a burner output setting, in which the on-time of each gas pulse burner can be regulated (set) as a fraction of an interval.
  • the setting of the output results in largely non-reactive setting work - as is known, only a certain burner output is required for a specific firing result. Since in the device according to the invention on the one hand the burner output per burner is adjusted as a fraction of the interval (ie percentage of the duty cycle) and on the other hand the pulses per minute are adjusted jointly (ie centrally) for all pulse burners, an automatic correction of the pulse time results when the number of pulses changes individual gas pulse burner, because the burner output is specified and maintained.
  • a tunnel furnace 1 according to the invention is provided in particular for firing ceramic products and is equipped with a plurality of burner groups in the firing zone.
  • Each burner group comprises a large number, for example max. 15, gas pulse burner 2.
  • These gas pulse burners 2 of each burner group are preferably arranged on the tunnel furnace 1, acting from above.
  • the gas pulse burners 2 are designed in accordance with DE-PS 35 13 820, i.e. equipped with a gas supply and an air supply, so that air can be pressed through the lance body between the gas impulses.
  • the burner system can be provided for reducing burning.
  • a gas supply main valve 4 can be connected by a gas line 3 with the interposition of each branch off a main gas line, numbered 5, for each burner group.
  • each burner group preferably extend on both sides of this main gas line 5.
  • they can be offset with respect to one another, i.e. lie on a zigzag line (see FIG. 1).
  • each burner group has an odd number of gas pulse burners 2 - the side gas pulse burners lie one behind the other in the longitudinal direction of the tunnel furnace, and the rest are arranged in a gap in the width of the tunnel furnace.
  • connection and setting device 6 As can be seen from FIG. 2, all function control elements of a gas pulse burner group are connected to a connection and setting device 6, from which a multi-core, preferably 10-core cable 7 leads to a controller unit 8.
  • the connection and setting device 6 is equipped with a microprocessor, not shown. This microprocessor is used to calculate and comply with the values to be observed for optimal firing of the ceramic moldings - it is able to switch / control the respective preselected burner output regardless of the set number of pulses (number of pulses per minute).
  • connection and setting device 6 is advantageously in the vicinity of the respective burner group, so that only short distances from this connection and setting device to the individual gas pulse burners are available.
  • the connection and setting device 6 can be arranged at a short distance next to the tunnel furnace 1 or even above the same.
  • the individual gas valves of the gas pulse burner 2 can be switched electrically, in particular by means of an electromagnetic valve.
  • At least some, preferably all, gas pulse burners 2 of the tunnel furnace firing zone can be operated with at least two pressure stages, so that the gas which is supplied periodically and in pulses is one time (ie at low gas pressure) in the upper region of the stocking and the other time (ie at high pressure) Gas pressure) ignites in the lower area of the firing flame - due to self-ignition due to sufficiently high temperature.
  • the solenoid valves of a main valve 4, a valve 9 for switching the second pressure stage of the gas pulse burner 2, possibly a purge air valve 10 and possibly a reduction valve 11 are connected to the connection and setting device.
  • a pressure switch 12 is connected to the connection and setting device 6.
  • connection and setting device 6 is installed in a stable housing with a separately accessible connection space. All setting and signaling elements required for operation are clearly arranged and advantageously user-friendly on the front panel behind a viewing window.
  • the participation time (reduction time) per pressure level can be set separately (for example 10-300 milliseconds).
  • the configuration switches which can only be set when a burner group is started up, are preferably located inside the device 6. A clear arrangement and good adjustability is also provided here. Specifically, the number of burners in the group is set and each gas pulse burner 2 involved in the reduction is released.
  • each gas pulse burner group is housed as a compact control unit in the connection and setting device, numbered 6. This control unit switches on up to 15 gas pulse burners 2 in succession. Each gas pulse burner 2 remains switched on for a time calculated from the preselected number of pulses and the burner on time.
  • This power is maintained at all times and always corresponds to the preselected duty cycle (for example 0 - 70% of 1 cycle / interval), even if the pulse frequency changes due to automatic (in particular initiated by the microprocessor) change in the pulse length.
  • the pulse length results from the following calculation:
  • All gas pulse burners 2 are started in succession and remain switched on for the calculated time.
  • the time offset between switching on the individual gas pulse burners 2 depends on the number of gas pulse burners 2 used and is calculated as follows:
  • Any flame profile can be set using the furnace cross-section.
  • the burner output is independent of the set number of pulses per minute.
  • the number of pulses per minute can be used to set the flame depending on the height of the stock (i.e. according to the requirements which depend on the height of the fired goods / stock stacked on the kiln car).
  • the dependence of the burner output on the pressure is determined in a particularly preferred embodiment by a factor (multiplier 1-2) for the low balanced pressure.
  • the height of the flame profile is shifted as a whole (almost a parallel shift of the flame or firing profile over the furnace cross-section height).
  • the setting of the burner group is very simple because the individual settings can be carried out largely without reaction.
  • the control unit according to the invention an optimal equalization of the fire in the tunnel furnace firing zone can be achieved.
  • each burner group there is a temperature sensor (thermocouple or optical pyrometer) for a two-point controller. This switches the control unit of the device numbered 6 with a slow pulse-pause ratio on and off. This controls the desired temperature in the firing zone.
  • a temperature sensor thermocouple or optical pyrometer
  • a special feature of the control device is that the duty cycle of each gas pulse burner 2 is switched as a fraction of an interval / cycle and can be regulated.
  • Another special feature is that at least some of the gas pulse burners 2 can be operated with at least 2 stages and the switching time and / or frequency of the gas supply can be regulated separately.
  • control circuit (not shown, but can be understood by the person skilled in the art on the basis of the functional description) is that at least some, preferably all, gas pulse burners 2 of a burner group can be operated with at least two pressure stages and the duty cycle of the same in one pressure stage by means of a factor - i.e. a percentage change - is changeable; in a particularly preferred manner there is a circuit arrangement according to which the duty cycle can be extended in the low pressure stage.
  • a time setting for pressure level 1 and pressure level 2 can be provided so that the burning time can be set separately in the upper and lower firing range.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Control Of Combustion (AREA)
EP89119189A 1988-10-17 1989-10-16 Dispositif de réglage des brûleurs à gaz par impulsion d'un four tunnel Expired - Lifetime EP0368033B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89119189T ATE89396T1 (de) 1988-10-17 1989-10-16 Vorrichtung zur steuerung von gasimpulsbrennern eines tunnelofens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3835362 1988-10-17
DE3835362A DE3835362A1 (de) 1988-10-17 1988-10-17 Vorrichtung zur steuerung von gasimpulsbrennern eines tunnelofens

Publications (2)

Publication Number Publication Date
EP0368033A1 true EP0368033A1 (fr) 1990-05-16
EP0368033B1 EP0368033B1 (fr) 1993-05-12

Family

ID=6365320

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89119189A Expired - Lifetime EP0368033B1 (fr) 1988-10-17 1989-10-16 Dispositif de réglage des brûleurs à gaz par impulsion d'un four tunnel

Country Status (3)

Country Link
EP (1) EP0368033B1 (fr)
AT (1) ATE89396T1 (fr)
DE (2) DE3835362A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0675325A1 (fr) * 1994-03-28 1995-10-04 Ngk Insulators, Ltd. Procédé et dispositif de commande de combustion des brûleurs dans un four
EP0709638A3 (fr) * 1994-09-05 1996-07-10 Ngk Insulators Ltd Méthode et appareil pour la cuisson d'articles céramiques moulés
BE1011655A3 (fr) * 1997-03-28 1999-11-09 Ngk Insulators Ltd Procede de cuisson d'une piece brute ceramique.
NL1017448C2 (nl) * 2001-02-26 2002-08-27 Nederlandse Gasunie Nv Ovenregeling voor warmtebehandeling van producten.

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19512633C1 (de) * 1995-04-05 1996-10-17 Heimsoth Keramische Oefen Und Verfahren zur Steuerung der Brenner eines Herdwagenofens
NL1000909C1 (nl) * 1995-08-01 1995-11-10 Flynn Controls B V Temperatuurregelaar voor een tunneloven.
DE102012002784A1 (de) * 2012-02-15 2013-08-22 Outotec Oyj Verfahren zur Regelung der Brennstoffzufuhr zu Brennern einer Brennergruppe und Brennerregler
CN111237754B (zh) * 2020-01-15 2020-12-04 山东大学 一种能够燃用多组分燃料的微火焰阵列燃烧器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1127525B (de) * 1960-05-28 1962-04-12 Manfred Leisenberg Einrichtung zur elektrischen Impulsregelung fuer OElbrenner von keramischen OEfen
CH461010A (de) * 1967-12-08 1968-08-15 Aebi Robert Ag Impulsölfeuerung für Industrieöfen, insbesondere für die Ziegel- und Keramikindustrie
FR2013579A1 (fr) * 1968-07-24 1970-04-03 Fetok Gmbh
DE3513820C1 (de) * 1985-04-17 1986-07-24 Keller Ofenbau GmbH, 4530 Ibbenbüren Gaslanze
EP0257840A2 (fr) * 1986-08-02 1988-03-02 Stordy Combustion Engineering Limited Brûleur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1127525B (de) * 1960-05-28 1962-04-12 Manfred Leisenberg Einrichtung zur elektrischen Impulsregelung fuer OElbrenner von keramischen OEfen
CH461010A (de) * 1967-12-08 1968-08-15 Aebi Robert Ag Impulsölfeuerung für Industrieöfen, insbesondere für die Ziegel- und Keramikindustrie
FR2013579A1 (fr) * 1968-07-24 1970-04-03 Fetok Gmbh
DE3513820C1 (de) * 1985-04-17 1986-07-24 Keller Ofenbau GmbH, 4530 Ibbenbüren Gaslanze
EP0257840A2 (fr) * 1986-08-02 1988-03-02 Stordy Combustion Engineering Limited Brûleur

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0675325A1 (fr) * 1994-03-28 1995-10-04 Ngk Insulators, Ltd. Procédé et dispositif de commande de combustion des brûleurs dans un four
US5630714A (en) * 1994-03-28 1997-05-20 Ngk Insulators, Ltd. Process for controlling combustion of burners in furnace and an apparatus therefor
EP0709638A3 (fr) * 1994-09-05 1996-07-10 Ngk Insulators Ltd Méthode et appareil pour la cuisson d'articles céramiques moulés
US5725829A (en) * 1994-09-05 1998-03-10 Ngk Insulators, Ltd. Method of firing ceramic formed bodies
BE1011655A3 (fr) * 1997-03-28 1999-11-09 Ngk Insulators Ltd Procede de cuisson d'une piece brute ceramique.
DE19813731C2 (de) * 1997-03-28 2000-08-10 Ngk Insulators Ltd Verfahren zum Brennen eines keramischen Formkörpers
NL1017448C2 (nl) * 2001-02-26 2002-08-27 Nederlandse Gasunie Nv Ovenregeling voor warmtebehandeling van producten.
EP1235045A1 (fr) * 2001-02-26 2002-08-28 Energie Techniek B.V. Contrôle d'un four pour le traitement thermique de produits

Also Published As

Publication number Publication date
DE3835362A1 (de) 1990-04-19
EP0368033B1 (fr) 1993-05-12
ATE89396T1 (de) 1993-05-15
DE58904340D1 (de) 1993-06-17

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