EP0054184B1 - Kühlzone für einen Brennofen, vorzugsweise Rollenofen - Google Patents

Kühlzone für einen Brennofen, vorzugsweise Rollenofen Download PDF

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Publication number
EP0054184B1
EP0054184B1 EP81109620A EP81109620A EP0054184B1 EP 0054184 B1 EP0054184 B1 EP 0054184B1 EP 81109620 A EP81109620 A EP 81109620A EP 81109620 A EP81109620 A EP 81109620A EP 0054184 B1 EP0054184 B1 EP 0054184B1
Authority
EP
European Patent Office
Prior art keywords
cooling
registers
firing
zone
heat transfer
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
Application number
EP81109620A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0054184A1 (de
Inventor
Gottfried Dr. Cremer
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.)
Buchtal Keramische Betriebe GmbH
Original Assignee
Buchtal Keramische Betriebe 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 Buchtal Keramische Betriebe GmbH filed Critical Buchtal Keramische Betriebe GmbH
Publication of EP0054184A1 publication Critical patent/EP0054184A1/de
Application granted granted Critical
Publication of EP0054184B1 publication Critical patent/EP0054184B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • F27B9/12—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity with special arrangements for preheating or cooling the charge
    • 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
    • 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
    • F27D7/06—Forming or maintaining special atmospheres or vacuum within heating chambers
    • 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
    • F27B9/12—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity with special arrangements for preheating or cooling the charge
    • F27B2009/124—Cooling
    • 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
    • F27B2009/3692—The charge containing combustible materials
    • 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
    • F27B9/2407—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 the conveyor being constituted by rollers (roller hearth furnace)
    • 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
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/007—Cooling of charges therein
    • F27D2009/0072—Cooling of charges therein the cooling medium being a gas
    • 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
    • F27D9/00—Cooling of furnaces or of charges therein
    • F27D2009/007—Cooling of charges therein
    • F27D2009/0081—Cooling of charges therein the cooling medium being a fluid (other than a gas in direct or indirect contact with the charge)
    • 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
    • F27D5/00—Supports, screens or the like for the charge within the furnace
    • F27D5/0062—Shields for the charge

Definitions

  • the formation of the cooling zone for a kiln consisting of a preheating, firing and cooling zone, preferably a roller kiln, has been given, through which the firing material, preferably ceramic tiles, without supporting firing aids made of refractory material is passed through in one layer.
  • the firing material passes through the preheating, burning and cooling zone on a roller carpet, the rollers of which are made of special steel or ceramic refractory material and are driven from outside the furnace.
  • the particular advantage of this furnace is that there is no need for trolleys and fireproof kiln furniture. These transport and support means represent a considerable mass that must be heated by the furnace and brought to cool in the cooling zone. A significant part of the energy supplied to the furnace for the firing of the material to be burned is thus wasted.
  • tumble cooling is generally used, i.e. H.
  • Appropriate amounts of air are introduced into the cooling zone and brought into effect on the firing material. This inevitably results, even if the firing zone is closed off from the cooling zone by an apron, to repercussions from the cooling zone into the firing zone and, if this is operated in a reducing manner, to reoxidation of the combustible material in the cooling zone and at least in the area adjacent to the cooling zone the burning zone.
  • the upper pipe coils or registers are possibly shielded from the firing material, the radiation surfaces of the pipe coils or registers carrying the heat transfer medium being protected against the firing material is preferably shielded in a controllable manner, so that not only is the firing material protected, but the cooling process can also be controlled in any desired and optimal manner.
  • the shielding can be omitted if necessary, because from here the firing material does not pose any danger of scaling, if at all. However, it is recommended if control of the cooling process is desired.
  • the coils or coils are preferably arranged transversely to the direction of travel of the firing material through the furnace, because then the feeding and removal of the heat transfer medium is particularly simple.
  • the arrangement and operation of the shield is much easier with such an arrangement of the coils or coils.
  • the adjustable shielding preferably consists of rotatable, paddle-like elements arranged in the manner of blinds. In the closed state of the shielding, these elements completely cover the cooling coils or registers and, by turning them slightly, leave slots free, through which the strongly cooled atmosphere around the cooling coils or registers suddenly falls down onto the firing material can come into effect.
  • slotted plates can also be used, which can be pushed over each other in the desired manner so that more or less large openings are available for the passage of the cooled atmosphere down onto the firing material.
  • the adjustability of the shield makes it possible to influence the cooling process in the cooling zone in any way.
  • a major advantage of the invention is that the pipe coils or registers carrying the heat transfer medium can be connected to the heat-recovering or reusable system or furnace parts.
  • a preheating zone V.Z. a firing zone B.Z., which is heated in the direction of arrow B by means of a burner, and a cooling zone K.Z., from which the finished fired and cooled fired material emerges.
  • the firing material B is transported through the furnace by means of rollers, one of which can be seen at 1 in FIG. 2, which shows a section through the cooling zone KZ along the line 11-11 of FIG. 1.
  • rollers form a roller carpet from the furnace inlet to the furnace outlet and are driven from the outside, so that they convey the firing material B stored on them through the furnace.
  • the cooling was carried out according to the prior art by means of cooling air which was introduced into the cooling zone by means of fans attached above and below the roller carpet.
  • apron indicated at 2 in FIG. 1 between the combustion zone B.Z. and the cooling zone K.Z. it is not possible to prevent this cooling air from reacting to the combustion zone and thus influencing the atmosphere there.
  • the combustion of the material to be burned in the cooling zone KZ is not carried out by blowing in cooling air, but by indirect cooling by means of a flowing heat transfer medium, preferably a liquid heat transfer medium, such as water, in the upper part of the cooling coils or registers 3, which are preferably laid transversely to the direction of travel and is also passed through in the lower part of the cooling zone.
  • a flowing heat transfer medium preferably a liquid heat transfer medium, such as water
  • the atmosphere in the cooling zone remains calm and there can no longer be any repercussions in the firing zone.
  • fixed shielding as can be seen at 4
  • shielding in the form of a type of blinds as indicated at 5 in Fig. 3.
  • This blind consists of paddle-like elements extending across the cooling zone, which can be adjusted so that they practically cover the gaps between the fixed shields 4. If the gaps are too large, so many elements can be arranged next to one another that they close the gap together in the transverse state. With this measure, not only is additional protection of the firing material B on the rollers 1 ensured, but it is also possible to meter the cooling process.
  • the paddle-like elements shown in FIG. 1 instead of the paddle-like elements shown in FIG.
  • an arrangement can also be provided which is composed of slotted plates extending transversely across the cooling zone or in the longitudinal direction of the cooling zone, the slits of which can be more or less coincident with one another, so that more or less Large openings are created through which the cooling coils or coils have a cooling effect on the firing material conveyed on the rollers 1.
  • Fireproof insulation 6 is located beneath the roller carpet consisting of rollers 1.
  • the cooling coils or registers 3 can be connected to systems or furnace parts in a manner not shown, for example guided to the preheating zone, so that part of the thermal energy of the heat transfer medium can be used there to preheat the combustion material. You can the heat absorbed by the heat transfer medium in a different way z. B. for drying, continue to use.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Tunnel Furnaces (AREA)
EP81109620A 1980-12-12 1981-11-11 Kühlzone für einen Brennofen, vorzugsweise Rollenofen Expired EP0054184B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3046918 1980-12-12
DE19803046918 DE3046918A1 (de) 1980-12-12 1980-12-12 Kuehlzone fuer einen brennofen, vorzugsweise rollenofen

Publications (2)

Publication Number Publication Date
EP0054184A1 EP0054184A1 (de) 1982-06-23
EP0054184B1 true EP0054184B1 (de) 1985-01-30

Family

ID=6119038

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81109620A Expired EP0054184B1 (de) 1980-12-12 1981-11-11 Kühlzone für einen Brennofen, vorzugsweise Rollenofen

Country Status (4)

Country Link
EP (1) EP0054184B1 (enrdf_load_stackoverflow)
JP (1) JPS57124684A (enrdf_load_stackoverflow)
DE (1) DE3046918A1 (enrdf_load_stackoverflow)
ZA (1) ZA818250B (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1147425B (it) * 1981-10-14 1986-11-19 Carfer Srl Forno ceramico a rulli a combustione e raffreddamento modulati
CN103148706A (zh) * 2013-04-10 2013-06-12 湖南高峰陶瓷制造有限公司 一种利用窑炉余热解决生产、生活用热水的方法及装置
CN103968662B (zh) * 2014-05-13 2016-06-01 盐城工学院 一种可降低粉尘排放的隧道窑及其降低粉尘排放的方法
CN111089474B (zh) * 2019-12-30 2025-02-21 湖南金炉科技股份有限公司 一种辊道窑系统
CN112197577B (zh) * 2020-10-10 2021-09-21 苏州汇科机电设备有限公司 具有进气预热功能的电子窑炉

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE976094C (de) * 1948-12-28 1963-02-21 Gottfried Dr Cremer Tunnelofen zum Brennen von keramischen und verwandten Erzeugnissen
DE975458C (de) * 1951-04-10 1961-11-30 Gottfried Dr Cremer Tunnelofen mit wenigstens teilweise indirekter Kuehlung der Abkuehlzone
US2968894A (en) * 1955-03-04 1961-01-24 Selas Corp Of America Annealing lehr
DE1177062B (de) * 1957-02-26 1964-08-27 Gottfried Cremer Dr Tunnelofen zum Brennen von keramischen und verwandten Erzeugnissen
DE1508540A1 (de) * 1966-05-27 1969-10-30 Siemens Gmbh Durchgangsofen
GB1194036A (en) * 1967-09-22 1970-06-10 Gibbons Borthers Ltd Improvements relating to furnaces including and elongated furnace chamber with conveyer means for conveying work to be heated along a feed path within the furnace chamber
JPS5240507A (en) * 1975-09-26 1977-03-29 Takasago Kogyo Kk Tunnel furnace
JPS5251409A (en) * 1975-10-22 1977-04-25 Takasago Kogyo Kk Tunnel furnace
JPS53147704A (en) * 1977-05-31 1978-12-22 Ngk Insulators Ltd Method of burning glazed ceramics in tunnel kilns and kilns used therefore
JPS5344923A (en) * 1977-06-03 1978-04-22 Yoshiyuki Iwami Safety means for propane gas bomb cocks
DE2824367A1 (de) * 1978-06-01 1979-12-06 Keramische Ind Bedarfs Gmbh Pa Verfahren zum steuern von mit reduzierender ofenatmosphaere zu betreibenden industrie-ofenanlagen
JPS54119508A (en) * 1978-12-13 1979-09-17 Takasago Kogyo Kk Truck type kiln
DE3032450C2 (de) * 1980-08-28 1986-07-03 Buchtal Gmbh, 8472 Schwarzenfeld Verfahren zur Verhinderung der Reoxidation des Brenngutes in der Kühlzone für einen Rollenofen und Rollenofen zur Durchführung des Verfahrens

Also Published As

Publication number Publication date
ZA818250B (en) 1983-01-26
DE3046918A1 (de) 1982-07-15
JPH0117072B2 (enrdf_load_stackoverflow) 1989-03-28
EP0054184A1 (de) 1982-06-23
JPS57124684A (en) 1982-08-03

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