US3511486A - Tunnel kilns - Google Patents

Tunnel kilns Download PDF

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Publication number
US3511486A
US3511486A US746913A US3511486DA US3511486A US 3511486 A US3511486 A US 3511486A US 746913 A US746913 A US 746913A US 3511486D A US3511486D A US 3511486DA US 3511486 A US3511486 A US 3511486A
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US
United States
Prior art keywords
kiln
door
shields
tunnel
gas extraction
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
US746913A
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English (en)
Inventor
Herbert Spitzbart
Manfred Schmitz
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 Ofenbau GmbH
Original Assignee
Keller Ofenbau 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 Ofenbau GmbH filed Critical Keller Ofenbau GmbH
Application granted granted Critical
Publication of US3511486A publication Critical patent/US3511486A/en
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
    • 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

Definitions

  • a tunnel kiln includes a firing zone through which ceramics to be fired are passed on carriages or trolleys. An exit end is sealed by a door, but to prevent escape of kiln gases when the door is opened, resilient shields are arranged to seal against the sides of the ware whenever the carriages are advanced through the kiln.
  • the invention relates to a kiln for the ceramics industry, and more particularly to a tunnel kiln for firing heavy ceramic ware.
  • cars loaded with the ceramic ware to be fired are placed, with at least one door at the entrance ends, which can be moved across the cross-section of the kiln and at which at least one vent for flue gases and the like is provided in the roof of the kiln, at least one movable shield being provided in the kiln to block the free cross-section to the flow of the flue gases, this shield being spaced away from the door and preferably having scoop-shaped guides, for the flue gases and the like, on that side which faces towards the door.
  • the object of the invention is to improve such a kiln.
  • the latter in one embodiment in which two rigid shields are fitted, the latter can be moved horizontally and locked in position.
  • vent pipes with extractor fan may open into the gas extraction space from the sides. These vent pipes ensure that the flue gases or other heating media are taken quickly away.
  • the kiln door is fitted with a sealing member, which rests on part of the loading flat of an end car and can be moved longitudinally in relation to the kiln and locked in position, this member enabling the car to be pushed continuously through the kiln.
  • FIG. 1 is a longitudinal section of the entrance end of a tunnel kiln in accordance with the invention
  • FIG. 2 is an end elevation of the kiln shown in FIG. I.
  • FIG. 3 is a plan of the kiln shown in FIG. 1.
  • a tunnel kiln 1 of which the drawings show only the entrance end, is normally closed by the door 2, which can be raisedand lowered.
  • Rails 4 extend along the length of the kiln 1, through the firing zone 3, on which the. cars 5a and 5b can be moved.
  • These cars 5a and 5b carry the ceramic ware that is to be fired, shaped bricks 6-, for example, which extends close to the kiln walls 1a and leaves only gaps 7a and 7b free along the Walls on each side. Between the bricks 6 fire gaps are provided which are arranged to align with fire holes '9, which serve to accommodate burners (not shown) for firing the kiln 1.
  • the cars So and 5b have interlocking loading flats and seal off the firing zone 3 from a passage running lengthwise below the tunnel kiln 1 and hence from the atmosphere.
  • the direction of travel of the cars 5a and 5b is indicated by arrow x, while the flue gases or the like are drawn off in the direction indicated by arrow y, which is opposite to the direction x, towards the entrance end of the tunnel kiln 1.
  • the gas extraction space 10 is bounded by the crown of the kiln and by a sealing member, 2a, respectively, which latter can be moved and locked in position and, by virtue of its length, enables the cars to be pushed through continuously.
  • vent pipe Leading from the gas extraction space are one vent pipe, 13, in the crown of the kiln, and several other vent pipes, such as 13a and 13b, in the side walls, these pipes being equipped with extractor fans, 14, 14a and 14b, here indicated only diagrammatically.
  • the extractor fans 14, 14a and 14b suck the flue gases or the like out of the gas extraction space in the direction T.
  • the shields 11 can be moved horizontally and adjusted by means not shown in the drawings.
  • the guide scoops 12 are raised into the empty space by the sealing member 211.
  • a ceramic kiln means defining a firing zone having an entry end and a delivery end, said firing zone being capable of accommodating carrier means for ceramic ware to 'be fired,
  • At least one movable shield disposed in the firing zone and arranged to block the open cross-section of the 3 4 kiln to the flow of flue gases, said shield being a sealing member fitted to the door, which sealing memspaced from the door, ber rests on part of a loading fiat of a car and can resilient shields arranged to make sliding contact with be moved longitudinally in relation to the kiln and ceramic ware on the carrier means, locked in position, said sealing member enabling the an extractor fan opening into the gas extraction space 5 cars to be moved continuously through the kiln.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Tunnel Furnaces (AREA)
  • Furnace Details (AREA)
US746913A 1968-04-04 1968-07-23 Tunnel kilns Expired - Lifetime US3511486A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1758112 1968-04-04

Publications (1)

Publication Number Publication Date
US3511486A true US3511486A (en) 1970-05-12

Family

ID=5694861

Family Applications (1)

Application Number Title Priority Date Filing Date
US746913A Expired - Lifetime US3511486A (en) 1968-04-04 1968-07-23 Tunnel kilns

Country Status (3)

Country Link
US (1) US3511486A (de)
FR (1) FR96047E (de)
NL (1) NL6818839A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4877012A (en) * 1987-03-18 1989-10-31 Msk-Verpackungs-Systeme Gesellschaft Apparatus for producing hot gas for the shrinkage of synthetic resin foils

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1778747A (en) * 1925-02-21 1930-10-21 Oscar L Barnebey Tunnel kiln
US2899189A (en) * 1959-08-11 Apparatus for processing compressed fuel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899189A (en) * 1959-08-11 Apparatus for processing compressed fuel
US1778747A (en) * 1925-02-21 1930-10-21 Oscar L Barnebey Tunnel kiln

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4877012A (en) * 1987-03-18 1989-10-31 Msk-Verpackungs-Systeme Gesellschaft Apparatus for producing hot gas for the shrinkage of synthetic resin foils

Also Published As

Publication number Publication date
NL6818839A (de) 1969-10-07
FR96047E (de) 1972-05-19

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