EP1353137B1 - Four industriel - Google Patents

Four industriel Download PDF

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Publication number
EP1353137B1
EP1353137B1 EP03004044A EP03004044A EP1353137B1 EP 1353137 B1 EP1353137 B1 EP 1353137B1 EP 03004044 A EP03004044 A EP 03004044A EP 03004044 A EP03004044 A EP 03004044A EP 1353137 B1 EP1353137 B1 EP 1353137B1
Authority
EP
European Patent Office
Prior art keywords
burners
kiln
industrial
auxiliary
furnace
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 - Lifetime
Application number
EP03004044A
Other languages
German (de)
English (en)
Other versions
EP1353137A1 (fr
Inventor
Jörg RIDDER
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.)
Riedhammer GmbH
Riedhammer GmbH and Co KG
Original Assignee
Riedhammer GmbH
Riedhammer GmbH and Co KG
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 Riedhammer GmbH, Riedhammer GmbH and Co KG filed Critical Riedhammer GmbH
Publication of EP1353137A1 publication Critical patent/EP1353137A1/fr
Application granted granted Critical
Publication of EP1353137B1 publication Critical patent/EP1353137B1/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 peculiar to furnaces of these types
    • F27B9/36—Arrangements of heating devices

Definitions

  • the invention relates to an industrial furnace with a furnace space for receiving firing tables, which have several Besatzebenen for kiln.
  • furnaces are both continuous and discontinuous furnaces, for example in the form of tunnel ovens (roller kilns), shuttle kilns or chamber furnaces, state of the art (Brunklaus "Industrieöfen” ISBN 3-8027-2906-4).
  • CH-352 272 describes an oven equipped with impulse burners firing in a kiln of a kiln serving as kiln furniture and having additional burners arranged in vertical rows and injecting into spaces between stock stacks of successive kilns. This should reduce the peak times.
  • US 4,480,992 A discloses a method for heating a furnace, wherein burners in different assignments can be activated.
  • the aforementioned furnaces are used, for example, for firing ceramic products or for heat treating steel. Since ceramic products can have completely different properties (for example, ferrites on the one hand and porcelain on the other hand), the furnaces must meet very different requirements.
  • a common criterion is the setting of a defined furnace atmosphere, for example to be able to burn certain glazes on a ceramic piece of glass at all.
  • the invention relates to an industrial furnace according to claim 1.
  • Some kiln burners operate in an area that is outside the firing level of the kiln.
  • direct burners such as gas burners, oil / kerosene burners or so-called low-gas burners are used due to the high performance targeted, but their flame in a space below the lowest level of occupation to be led.
  • this space communicates fluidically with the rest of the furnace space, so that the heat can then flow into the remaining furnace space through convection.
  • the burners will usually be aligned horizontally and accordingly their direction of action is horizontal in the space below the lowest level of occupation.
  • the burners can be arranged on opposite walls of the furnace chamber.
  • burners can also be provided in the area of the other kiln walls.
  • the burners can be placed offset in a horizontal plane or different horizontal planes.
  • An offset of the burners in the area of opposite wall surfaces means that the hot combustion air can "flow through” immediately below the corresponding filling level and rise in the area of the opposite wall.
  • auxiliary burners are provided above the lowest level of the firing tables but, as the name implies, merely have an "auxiliary function". By this is meant that the energy output of the auxiliary burners (within the furnace or furnace segment) is at most 30% of the total energy output of the burners, with a maximum auxiliary burner performance of 20% or 10%, even less.
  • the auxiliary burners can be arranged at different distances from the bottom of the furnace chamber.
  • auxiliary burner are arranged so that they fire in open spaces (lanes) between adjacent firing tables, so like the main burner, the firing material does not apply directly.
  • the firing tables are arranged symmetrically next to each other and one behind the other, resulting directly through gaps between opposite walls (open spaces), in the area of the auxiliary burner can be arranged.
  • the main burners may be taxable individually or in groups.
  • a batch furnace such as a hearth kiln, in which prevail at a given time in the entire furnace chamber more or less constant temperature and atmospheric conditions (should), it is advisable to always drive the burner or auxiliary burner in synchrony over the Furnace space as constant as possible to obtain conditions.
  • the main burners can be grouped into two control groups, for example such burners on one side and burners on the opposite side of the furnace.
  • the control can be done via thermocouples.
  • auxiliary burners are (analogously) grouped into control groups. Each auxiliary burner is assigned its own thermocouple. Any deviations from the setpoint temperature can be readjusted very precisely locally.
  • the other features of the furnace such as the transport of the firing tables (kiln cars) into the kiln and out of the kiln, the insulation of the kiln or other features, may be well known in the art.
  • the single FIGURE shows - in a schematic representation - provided for burning sanitary porcelain shuttle kiln in vertical longitudinal section.
  • the formed with a rectangular base furnace comprises a bottom 10, a ceiling 12 and three, bottom 10 and ceiling 12 respectively connecting walls, of which two walls, namely the walls 14 and 16 are visible in the figure.
  • an oven door 18 is arranged schematically, which can be guided from the illustrated open position into a closed position in order to complete the furnace chamber 20 on the circumference.
  • exhaust passages 22 are provided which open into a common flue gas duct 24, from which flue gas is discharged via a chimney 26.
  • kiln cars 30 are arranged one behind the other, the kiln cars are guided on rollers or balls.
  • a firing table assembly 32 with (here) four landing levels 32.1, 32.2, 32.3 and 32.4, the spacing of the landing levels being determined by the height of the sanitary objects 34 to be fired.
  • each lowermost coating level 32.1 which, like the other loading levels 32.2, 32.3 and 32.4, is formed by a refractory plate (a kiln furniture).
  • the free space 36 is bounded on the underside by a chassis 30 c of the associated kiln car 30.
  • recuperator gas burner 38, 40 In this free space 36 fire here a total of 16 recuperator gas burner 38, 40, wherein the burner 40 in the region of the wall 14 and the burner 38 in the (not shown) wall opposite the wall 14 are arranged.
  • the burners 38 are combined in separate control group. The same applies to the burners 40.
  • Temperature monitoring is carried out for each control group via a central temperature sensor.
  • a burner pair 38, 40 is associated with a combustion trolley 30 and a free space 36, the burner 38 fires in the direction of the wall 14 and the burner 40 in the direction of the (not shown) opposite wall.
  • the burners 38, 40 are each arranged at a distance from one another.
  • the power of the burners 38, 40 is about 90% of the total burning power of the furnace.
  • the remaining 10% energy is provided by so-called auxiliary torches 42 which are arranged on the wall side above the lowermost covering level 32.1 of the firing tables 32, and at different heights, as shown in the figure.
  • auxiliary burners 42 do not fire directly on the kiln 34, but only in lanes 44 between adjacent kiln cars 30.
  • the burner 42 are individually regulated / controlled.
  • a defined temperature and atmospheric profile can be set in the furnace, and also time-dependent.
  • recuperator gas burner instead of the mentioned recuperator gas burner other burner forms, such as tunnel burners, conventional gas burners or oil burners, impulse burners, high-speed burners or the like can find application.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Tunnel Furnaces (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)

Claims (13)

  1. Four industriel avec un espace de four (20) pour la réception de tables de cuisson (32) qui comportent un ou plusieurs niveaux d'occupation (32.1, 32.2, 32.3, 32.4) pour le produit à cuire (34), ainsi que
    a) avec des brûleurs (38, 40) qui sont disposés de telle sorte qu'ils brûlent dans un espace (36) en dessous du niveau d'occupation inférieur (32.1) des tables de cuisson (32) et
    b) avec des brûleurs auxiliaires supplémentaires (42) qui, rassemblés dans des groupes de régulation, sont disposés de telle sorte qu'ils brûlent dans un espace (44) au-dessus du niveau d'occupation inférieur (32.1) des tables de cuisson (32), sachant qu'à chaque brûleur auxiliaire (42) est affecté un thermocouple et
    c) sachant que la puissance énergétique des brûleurs auxiliaires (42) contribue à la puissance énergétique totale pour moins de 30 %.
  2. Four industriel selon la revendication 1, dans lequel les brûleurs (38, 40) sont disposés sur des parois (14) opposées de l'espace de four (20).
  3. Four industriel selon la revendication 1, dans lequel les brûleurs (38, 40) sont disposés sur toutes les parois (14, 16, 18) de l'espace de four (20).
  4. Four industriel selon la revendication 1, dans lequel les brûleurs (38, 40) sont disposés sur les parois (14) opposées, décalés alternativement dans l'horizontale les uns par rapport aux autres.
  5. Four industriel selon la revendication 1, dans lequel les brûleurs auxiliaires (42) sont disposés à différentes distances du fond (10) de l'espace du four.
  6. Four industriel selon la revendication 1, dans lequel la puissance énergétique des brûleurs auxiliaires (42) du four industriel contribue pour moins de 20 % à la puissance énergétique totale du four industriel.
  7. Four industriel selon la revendication 1, dans lequel la puissance énergétique des brûleurs auxiliaires (42) du four industriel contribue pour moins de 10 % à la puissance énergétique totale du four industriel.
  8. Four industriel selon la revendication 1, dans lequel les brûleurs auxiliaires (42) sont disposés de telle sorte qu'ils brûlent dans les espaces libres (44) entre les tables de cuisson (32) voisines.
  9. Four industriel selon la revendication 1, dans lequel les brûleurs (38, 40) sont commandables, respectivement régulables séparément ou en groupes.
  10. Four industriel selon la revendication 1, dans lequel les brûleurs (38, 40) et/ou les brûleurs auxiliaires (42) sont des brûleurs à gaz.
  11. Four industriel selon la revendication 1, dans lequel les brûleurs (38, 40) et/ou les brûleurs auxiliaires (42) sont des brûleurs à gaz de récupération.
  12. Four industriel selon la revendication 1, dans lequel les brûleurs (38, 40) et/ou les brûleurs auxiliaires (42) sont disposés de telle sorte qu'il ne se produit aucune sollicitation directe du produit à cuire (34) par les flammes.
  13. Four industriel selon la revendication 1 de la forme d'un four à sole mobile.
EP03004044A 2002-04-10 2003-02-25 Four industriel Expired - Lifetime EP1353137B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10215670 2002-04-10
DE10215670A DE10215670C1 (de) 2002-04-10 2002-04-10 Industrieofen

Publications (2)

Publication Number Publication Date
EP1353137A1 EP1353137A1 (fr) 2003-10-15
EP1353137B1 true EP1353137B1 (fr) 2007-05-30

Family

ID=28051231

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03004044A Expired - Lifetime EP1353137B1 (fr) 2002-04-10 2003-02-25 Four industriel

Country Status (4)

Country Link
EP (1) EP1353137B1 (fr)
AT (1) ATE363637T1 (fr)
DE (2) DE10215670C1 (fr)
PT (1) PT1353137E (fr)

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1250602B (fr) * 1967-09-21
CH352272A (de) * 1956-06-27 1961-02-15 Aton Gmbh Fuer Planung Und Bau Ofen
CH372971A (de) * 1958-08-06 1963-10-31 Aton Planungs & Baugesellschaft Fuer Die Keramische Industrie Mbh Verfahren zum Betrieb von Tunnelöfen und zur Durchführung dieses Verfahrens bestimmter Tunnelofen
AT225093B (de) * 1959-10-22 1962-12-27 Aton Planungs & Baugesellschaft Fuer Die Keramische Industrie Mbh Indirekt beheizter Tunnelofen zum Brennen insbesondere von gegen die Einwirkung der Ofenatmosphäre empfindlichem keramischem Gut
DE1166080B (de) * 1960-07-05 1964-03-19 Aton Planungs Und Baugesellsch Tunnelofen, insbesondere solcher grosser Breitenausdehnung
US3172647A (en) * 1963-03-26 1965-03-09 Bickley Furnaces Inc Continuous kiln
DE2318971A1 (de) * 1973-04-14 1974-10-24 Koppers Wistra Ofenbau Gmbh Verfahren zur ofenbeheizung
US4480992A (en) * 1981-10-17 1984-11-06 Sanken Sangyo Kabushiki Kaisha Method of heating a furnace
JPH0522790Y2 (fr) * 1987-02-14 1993-06-11
JPH0791113B2 (ja) * 1988-03-29 1995-10-04 日本碍子株式会社 セラミックスの焼成方法およびその方法に用いられる焼成道具
NL1000126C2 (nl) * 1995-04-12 1996-10-15 Adriaan Cornelis Christiaan Hu Hoge-snelheidsbrander voor keramische ovens.
GB9601483D0 (en) * 1996-01-25 1996-03-27 Groom Bryan Ltd Kiln assembly
DE10041132A1 (de) * 2000-08-21 2002-03-14 Keller Hcw Gmbh Tunnelofenanlage zum Brennen von keramischen Formlingen, insbesondere Ziegeln

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE10215670C1 (de) 2003-11-06
PT1353137E (pt) 2007-07-03
ATE363637T1 (de) 2007-06-15
DE50307348D1 (de) 2007-07-12
EP1353137A1 (fr) 2003-10-15

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