EP4354063A2 - Dispositif pour chauffer des installations de four pour des marchandises, en particulier pour des articles en verre, et installation de four ainsi équipée - Google Patents

Dispositif pour chauffer des installations de four pour des marchandises, en particulier pour des articles en verre, et installation de four ainsi équipée Download PDF

Info

Publication number
EP4354063A2
EP4354063A2 EP23202011.5A EP23202011A EP4354063A2 EP 4354063 A2 EP4354063 A2 EP 4354063A2 EP 23202011 A EP23202011 A EP 23202011A EP 4354063 A2 EP4354063 A2 EP 4354063A2
Authority
EP
European Patent Office
Prior art keywords
furnace system
interior
furnace
heating element
air
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.)
Pending
Application number
EP23202011.5A
Other languages
German (de)
English (en)
Other versions
EP4354063A3 (fr
Inventor
Klaus-Uwe Hoff
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.)
Ernst Pennekamp & Co oHG GmbH
Original Assignee
Ernst Pennekamp & Co oHG 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 Ernst Pennekamp & Co oHG GmbH filed Critical Ernst Pennekamp & Co oHG GmbH
Publication of EP4354063A2 publication Critical patent/EP4354063A2/fr
Publication of EP4354063A3 publication Critical patent/EP4354063A3/fr
Pending legal-status Critical Current

Links

Images

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
    • F27D7/00—Forming, maintaining or circulating atmospheres in heating chambers
    • F27D7/04—Circulating atmospheres by mechanical means
    • 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
    • F27B9/06—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated
    • F27B9/10—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated heated by hot air or gas
    • 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
    • F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
    • F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path
    • F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path being carried by a conveyor
    • 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
    • F27B9/36—Arrangements of heating devices

Definitions

  • the invention relates to a device for heating furnace systems according to the preamble of claim 1 and to a furnace system with such a device.
  • Such furnace systems have a wide range of uses in industry, in particular in the manufacture of glassware, but also in the production of ceramics and porcelain goods or certain metal goods.
  • the furnace systems that are equipped with such devices can be used for firing, decorating, tempering, relaxing or cooling the goods. It is important that very specific temperatures prevail in the furnace. Since these temperatures are usually in a temperature range of up to 900°C, the furnace systems must be heated. Convection heat is often provided for this purpose.
  • the EN 10 2005 057 238 B4 and the EP 1 954 639 B1 a furnace system for glassware with an enclosure that has a surface pore burner and a double fan wheel that is driven by a motor.
  • the surface pore burner is operated with gas.
  • Conventional furnace systems with electrical resistance heating are designed in such a way that the air circulation unit and the electrical heating elements are arranged as separate components in the furnace.
  • the air circulation unit arranged in the furnace sucks in the process air from the interior of the furnace and directs it into the circulation channel. This contains the electrical heating elements, which heat the air flowing around them. The heated air then returns to the process chamber, from where the cycle described begins again.
  • Another disadvantage is that conventional resistance heaters have a large installation space with a correspondingly high mass, as this creates the largest possible radiating surfaces in order to maintain a low wall load on the adjacent channel walls.
  • a correspondingly high electrical power must be applied to heat up the resistance elements themselves each time the furnace is heated up, which on the one hand reduces the efficiency of the furnace system and on the other hand results in sluggish control behavior.
  • Another disadvantage is that a significant proportion of the electrical energy introduced penetrates the furnace insulation as radiant heat through the radiating surfaces via the adjacent furnace walls, heats them up and is thus lost to the process.
  • furnace systems operated using the convection process are heated either by direct firing using gas burners (for example as a mouth mixing burner, fan burner, surface pore burner, etc.) or by using electrical resistance heaters. Due to climate change and the energy crisis, many furnace system operators are uncertain about which heating energy will be used in the future. If the form of energy is changed (gas to electricity or electricity to gas), existing furnace systems must be extensively and laboriously redesigned. Firstly, the heating elements installed in the system must be removed. This is necessary because otherwise they would have a severely negative impact on the functionality of the other type of heating or make it impossible. In addition, extensive reconstruction work on the furnace housing is necessary.
  • the object of the invention is therefore to avoid the aforementioned disadvantages and to conceptually develop a device for heating systems in furnace systems in such a way that conversion from one form of heating to another is easy to implement and economically viable without having to make modifications to the furnace system itself. Furthermore, the object of the invention is to provide a furnace system that is equipped with a heating device according to the invention.
  • the at least one heating element, the fan wheel and the motor are fixed in or on a common housing so that these components form a compact assembly.
  • This assembly can be fixed from the outside of the furnace system, in particular on its housing, so that it can be exchanged for another assembly with a different type of heating simply and easily without major reconstruction work. To do this, the assembly simply has to be dismantled from outside the furnace system and the new assembly installed. A new opening into the interior of the furnace does not have to be made, so that no unwanted additional emissions arise or the furnace system has to be laboriously closed again.
  • the device comprises at least one motor which drives a fan wheel via its motor shaft and a preferably metallic housing which is attached to the outside of the furnace system.
  • the metallic housing thermally separates the combustion chamber from the furnace environment and is also used to attach the drive motor.
  • the heating element is located next to the fan wheel, so that all of the heat generated by the heating element is transferred to the fan wheel convectively and via radiation.
  • the fan wheel can advantageously be designed as a double fan wheel.
  • the housing also has thermal insulation so that the energy inside the furnace system does not escape through the housing to the outside or into the furnace insulation and is thus lost for the process.
  • heating elements are provided which are operated with electrical energy, in particular in the form of a resistance heater. Heating elements which are arranged as deeply corrugated wire elements or in a spiral on ceramic tubes are particularly preferred. Even with electrical heating elements, the invention is thus able to provide heating outputs of up to 80 kW, for example, which corresponds to an energy density of more than 3500 kW/m 2 and which is required for some of the applications.
  • air from the interior of the furnace system can be directed from above onto the heating elements of the device in order to prevent overheating of the heating elements in the upper region.
  • these can also be designed as surface pore burners, orifice mixing burners, blower burners or other industrial burners that are operated with gas.
  • a shaped shaft can also be formed between the gas burners and the fan wheel in order to direct the hot gases and air heated by the surface pore burner to the fan wheel so that they can be distributed directly.
  • a seal can be provided that is arranged between the housing and the enclosure of the furnace system and that prevents heated air from the heating elements from escaping directly into the outside area and thus being lost to the process. Air from inside the furnace system can also not get into the outside area.
  • the invention further comprises a furnace system with at least one device as described above.
  • changes between different devices can take place without major conversion work, for example to switch from one type of energy to another or to carry out maintenance and repair work on the fan wheel or other components.
  • air can be directed from the outside area into the interior of the furnace system via the device.
  • the device is thus also able to cool the interior of the furnace system.
  • the furnace system itself preferably has an enclosure and thermal furnace insulation which shields the interior of the furnace system from the outside so that as little heat output as possible is lost from the interior of the furnace system.
  • the device can be inserted into the enclosure so that the enclosure and furnace insulation are removed at one point and the device is installed there instead. If devices of different designs have the same dimensions, they can be easily replaced without having to make any modifications to the furnace system.
  • the device can also be retrofitted to existing furnace systems. This means that only a one-time modification is required to convert the furnace system to the device and that switching between different devices can then be carried out without having to carry out major modifications.
  • the fan wheel When the device is installed, the fan wheel is preferably located inside the furnace system and close to the heating element, thus ensuring that the air inside the furnace system is circulated and mixed.
  • the air heated by the heating element(s) is transported away from the heating elements.
  • the fan wheel sucks in the air from inside the furnace system and mixes it with the air heated by the heating elements.
  • one or more circulation channels are provided in the furnace system, into which the fan wheel releases the sucked-in and mixed air to then be fed into the interior of the furnace system.
  • the air can be distributed more precisely inside the furnace system through these circulation channels.
  • the furnace system can have one or more conveyor belts made of perforated material inside it. These belts are often made of metal with openings in various patterns and shapes so that the bottom of the goods on the conveyor belt can also be exposed to air. It is particularly preferred that the mixed air from the circulation channel be guided from below through the perforated conveyor belt past the goods into the interior of the furnace system. This process is known as "up-draft”. However, the reverse flow direction of the mixed air is also practical. This process is known as "down-draft".
  • a furnace system 10 according to the invention is shown.
  • This comprises a housing 12 and a furnace insulation 13, which thermally separates the interior 11 of the furnace system 10 from the exterior 14.
  • a device 20 according to the invention which will be shown in more detail later, is inserted into an opening in the housing 12 and the furnace insulation 13.
  • the device 20 comprises a motor 23, at least one heating element 30, which is not shown here, and a fan wheel 22, as well as a housing 21, also not shown here, with which it is fastened in the housing 12 of the furnace system 10.
  • the air circulation in the furnace system 10 is shown here by arrows. Two thick arrows from diagonally below symbolize the air that is sucked in by the fan wheel 22 from the interior 11 of the furnace system 10.
  • Two short black arrows symbolize the air heated by the heating elements 30, which is also sucked in by the fan wheel 22.
  • the air is distributed by the elongated arrows along the circulation channels 15 and is then guided from below, symbolized by a large number of short diagonal arrows, through the perforated conveyor belt 16 back into the interior 11 of the furnace system 10.
  • This type of air flow is referred to as up-draft operation.
  • Fig. 2 the same system as in Fig.1 shown, but here in down-draft operation.
  • the hot air generated by the heating elements 30 is also sucked in by the fan wheel 22.
  • the fan wheel 22 does not suck in the air from the interior 11 of the furnace system 10, but from the circulation channels 15.
  • the air is then not directed into the circulation channels 15, but rather into the interior 11 of the furnace system 10. From there, the air flows from above onto the conveyor belt 16, on which the goods to be treated are located, and through the perforated conveyor belt 16 into the circulation channels 15, from where from which it is sucked in again by the fan wheel 22.
  • This operating mode is referred to as down-draft operation.
  • Which type of operation of the furnace system 10 is selected depends on the respective application. To change from up-draft to down-draft operation and back again, only a change in the geometry of the fan wheel 22 is necessary.
  • Two small hatched arrows indicate air that is directed from the interior 11 of the furnace system 10 onto the heating elements 30 from above. This can be done in both up-draft operation and down-draft operation. In this furnace system 10, the device 20 can be exchanged quickly and with little conversion time for another device 20 that has the same or different properties.
  • Fig. 3 now shows in detail a device 20 according to the invention.
  • the motor 23 the motor shaft of which extends through the heating elements 30 to the fan wheel 22, which is driven by the motor 23.
  • the movement of the motor 23 is indicated by a curved arrow, the air flows generated by the fan wheel 22 again by corresponding arrows.
  • the fan wheel 22 is designed as a double fan wheel 22 in this embodiment.
  • the fan wheel 22 sucks in air both from the heating elements 30 and from the interior 11 of the furnace system 10 and releases it into the circulation channels 15.
  • the housing 21 can also be seen here, which is inserted into the housing 12 and the thermal furnace insulation 13.
  • a thermal insulation 31 is arranged between the heating elements 30 and the housing 21, which prevents the heating energy of the heating elements 30 from being released into the outside area 14 via the housing 21.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Furnace Details (AREA)
EP23202011.5A 2022-10-14 2023-10-06 Dispositif pour chauffer des installations de four pour des marchandises, en particulier pour des articles en verre, et installation de four ainsi équipée Pending EP4354063A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202022105820 2022-10-14

Publications (2)

Publication Number Publication Date
EP4354063A2 true EP4354063A2 (fr) 2024-04-17
EP4354063A3 EP4354063A3 (fr) 2024-04-24

Family

ID=88372505

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23202011.5A Pending EP4354063A3 (fr) 2022-10-14 2023-10-06 Dispositif pour chauffer des installations de four pour des marchandises, en particulier pour des articles en verre, et installation de four ainsi équipée

Country Status (1)

Country Link
EP (1) EP4354063A3 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1954639B1 (fr) 2005-11-29 2011-06-29 Pennekamp GmbH Dispositif de chauffage d'installations de four

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2712842A1 (de) * 1977-03-23 1978-09-28 Ki Vni I Pk I Avtomatizacii Pr Thermischer ofen mit zwangsumlauf von gas
AT395058B (de) * 1989-04-13 1992-09-10 Vaillant Gmbh Geblaesebrenner, insbesondere sturzbrenner
DE102011102984A1 (de) * 2011-05-23 2012-11-29 Ernst Pennekamp Gmbh & Co. Ohg Vorrichtung zum Beheizen von Ofenanlagen für Waren, insbesondere für Glaswaren, sowie hiermit versehene Ofenanlage

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1954639B1 (fr) 2005-11-29 2011-06-29 Pennekamp GmbH Dispositif de chauffage d'installations de four
DE102005057238B4 (de) 2005-11-29 2011-11-10 Pennekamp Gmbh Ofenanlage für Waren, insbesondere für Glaswaren und Verfahren zum Betreiben dieser

Also Published As

Publication number Publication date
EP4354063A3 (fr) 2024-04-24

Similar Documents

Publication Publication Date Title
DE2637646B2 (de) Anwärmofen
DE102009048797B3 (de) Wärmebehandlungsanlage und Verfahren zur Wärmebehandlung von Einsatzgut
DE3203433C2 (de) Anwärmofen für langgestrecktes Gut
DE102005001569B4 (de) Anlage zur Verschwelung eines Pyrolyseguts
DE2608228A1 (de) Tunnelofen mit kuehlung und bodeneffekteinrichtung
DE2139488A1 (de) Regenerierender Raumerhitzer
EP2330372B1 (fr) Four à cornue chauffé électriquement pour le traitement thermique de pièces usinées métalliques
EP4354063A2 (fr) Dispositif pour chauffer des installations de four pour des marchandises, en particulier pour des articles en verre, et installation de four ainsi équipée
DE3024445C2 (de) Gasherd mit Strahlungsbrenner
DE102012102194A1 (de) Ofenanlage sowie Verfahren zum Betreiben der Ofenanlage
EP0344413B1 (fr) Four pour le traitement thermique de pièces en fer et en acier
DE2812888A1 (de) Hochtemperatur-autoklav
EP0037046A1 (fr) Brûleur à radiation
DE19538364C5 (de) Vorrichtung zur Schnellerwärmung von Metall-Preßbolzen
DE4413252A1 (de) Elektrischer Back- und Bratofen
DE102015112375A1 (de) Durchlaufofen und Verfahren zu dessen Betrieb
EP1954639B1 (fr) Dispositif de chauffage d'installations de four
DE102018114615A1 (de) Temperaturkalibrator
DE19545391A1 (de) Verfahren zur Wärmebehandlung von Werkstücken
DE10149149A1 (de) Verfahren und Vorrichtung zum Beheizen eines Plastifizierzylinders
DE102007058053B4 (de) Diffusionsofen und Verfahren zur Erzeugung einer Gasströmung
DE60002592T2 (de) Gasdurchlaufofen insbesondere für kautschuk produkte
DE102005058592A1 (de) Dampferzeuger
DE102004038247B3 (de) Vorrichtung und Verfahren zur Erwärmung von Strangpresswerkzeugen vor dem Einbau in eine Strangpresse
DE202008014608U1 (de) Drehofen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR

RIC1 Information provided on ipc code assigned before grant

Ipc: F27B 9/36 20060101ALI20240320BHEP

Ipc: F27B 9/24 20060101ALI20240320BHEP

Ipc: F27B 9/10 20060101AFI20240320BHEP

Ipc: F27D 7/04 20060101ALI20240320BHEP

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR

17P Request for examination filed

Effective date: 20241023