EP0718577A2 - Four électrique à résistance - Google Patents

Four électrique à résistance Download PDF

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Publication number
EP0718577A2
EP0718577A2 EP95120112A EP95120112A EP0718577A2 EP 0718577 A2 EP0718577 A2 EP 0718577A2 EP 95120112 A EP95120112 A EP 95120112A EP 95120112 A EP95120112 A EP 95120112A EP 0718577 A2 EP0718577 A2 EP 0718577A2
Authority
EP
European Patent Office
Prior art keywords
opening
deglor
edge
ceiling
protective tube
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
EP95120112A
Other languages
German (de)
English (en)
Other versions
EP0718577A3 (fr
EP0718577B1 (fr
Inventor
Helge Dr. Jansen
Ludwig Dr. Weiler
Christian Dr. Wieckert
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.)
Alstom KK
Original Assignee
ABB KK
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 ABB KK filed Critical ABB KK
Publication of EP0718577A2 publication Critical patent/EP0718577A2/fr
Publication of EP0718577A3 publication Critical patent/EP0718577A3/fr
Application granted granted Critical
Publication of EP0718577B1 publication Critical patent/EP0718577B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/62—Heating elements specially adapted for furnaces
    • 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
    • F27D11/00—Arrangement of elements for electric heating in or on furnaces
    • F27D11/02—Ohmic resistance heating

Definitions

  • the invention relates to a deglor furnace according to the preamble of claim 1.
  • Deglor ovens are used for the glazing of ashes from waste incineration plants. Contaminants contained in the ashes are evaporated and separated. The glazed components can be used as building materials or deposited. Deglor ovens operate at temperatures between 1300 ° C and 1500 ° C. For this purpose, each deglor oven is provided with heating elements in its ceiling area. The heating elements are surrounded on the outside by a protective tube made of ceramic, which is permanently closed at one end and has a detachable closure at the second end.
  • a deglor furnace is known from German patent application P 4328718.2, in which the ceramic protective tube has a flange at its open end, which flange is formed by a metal clamp.
  • the clamp is attached to the outer surface of the protective tube by means of one or more screws.
  • a U-shaped heating element is arranged inside the protective tube. Its electrical connections are led through the removable closure to the outside.
  • the flange attached to the open end of the protective tube is placed on the surface of the deglor oven and serves as a holder for the heating element.
  • the protective tube is led into the interior of the deglor oven through an opening in the ceiling. The opening is immediately limited by the thermal insulation of the ceiling.
  • the invention has for its object to show a deglor furnace in which the disadvantages described above are eliminated.
  • the opening and its edge areas are provided with a shield.
  • the shield has a gastight ceramic cylinder. The entire inner surface of the opening is lined with this.
  • the cylinder is connected with a refractory cement to the insulating bricks that delimit the inner surface of the opening.
  • the edge of the opening facing the interior of the deglor furnace is covered by one or more plates made of refractory bricks.
  • the inner lining of the deglor furnace is also made from these panels. The plates are arranged so that they directly adjoin the protective tube of the heating element, so that the penetration of the gas from the interior into the opening is largely prevented.
  • the outward-facing edge of the opening is covered by a ring-shaped plate made of stainless steel, which also partially lies on the surface of the ceiling. Between this plate 13 and the edge of the ceramic cylinder, a seal made of fibers is arranged. This seal is designed as a mat. However, cords with the same properties can also be used.
  • the dimensions of the plate are chosen so that they directly adjoin the protective tube of the heating element.
  • the heating element is held on the surface of the plate.
  • the protective tube of the heating element is provided with an outward-facing flange which is placed on this plate. Due to the weight of the protective tube, the plate is pressed against the opening and the cylinder lining the opening, as a result of which an additional sealing of the deglor furnace to the outside is achieved.
  • the only figure belonging to the description shows a section of a deglor furnace 1.
  • the ceiling 2 consists of two or more layers of insulating stones 2I, which serve as thermal insulation. These are preferably made of oxide ceramic.
  • the deglor furnace 1 is heated by a large number of heating elements 3, one of which is shown in the figure.
  • Each of these heating elements 3 has a heating rod 6, which is arranged in a ceramic protective tube 4.
  • the protective tube 4 is permanently closed at its first end 4A, while its second end 4B has a detachable cover 4D. This can be removed in order to replace the heating element 6 by another if the former is defective.
  • the electrical connections 6A of the heating element 6 are led out of the protective tube 4 through the cover 4D.
  • the protective tube 4 is provided at its second end 4B with an outwardly facing flange 4F. This consists of a clamp that is attached to the outside of the protective tube 4 by means of screws 4S. This flange 4F serves to hold the heating element 3 on the surface 2S of the ceiling 2.
  • the protective tube 4 is passed through an opening 10 which is continuous from the surface 2S of the deglor furnace 1 to its interior 1R.
  • the protective tube 4 projects into the interior 1R with its first end 4A and about a third of its length. So that no corrosive gases 30 can get from the interior 1R to the insulating stones 2I of the ceiling 2 and to the outside, the opening 10 and its inner and outer edge regions 10A and 10I are surrounded by a shield 11.
  • the shield 11 comprises a cylinder 12 made of ceramic, an annular plate 13 made of stainless steel and one or more plates 14 made of refractory stones.
  • the plates 14 are arranged on the underside of the ceiling 2, that the inwardly facing edge 10I of the opening 10 of these Plates 14 is covered.
  • the cylinder 12 made of ceramic 12 belonging to the shield 11 is dimensioned such that its outer surface directly adjoins the insulating blocks 2I.
  • the cylinder 12 is made of Al203, mullite, MgAl2O4 or another refractory material with the same properties. It is connected to the insulating stones 2I via a refractory cement 16.
  • the refractory cement is one based on Al203 which binds hydraulically.
  • the edge 12I of the cylinder 12 facing the interior 1R is placed on the immediately adjacent plates 14. Since the plates 14 are guided up to the protective tube 4 of the heating element 3, this creates a step on which the cylinder 12 with its edge 12I can be placed. Between the edge 12I of the cylinder 12 and the plates 14, a seal 15 made of fibers is arranged, which is designed as a mat or cord. This creates a further protection of the insulating stones 2I against the corrosive gases 30. On the outwardly facing edge 10A of the opening 10 and the edge 12A of the cylinder 12, the annular plate 13 made of stainless steel is placed, which is directly adjacent to the protective tube 4. The plate 13 also lies on the surface 2S of the ceiling 2.
  • One or more fiber seals 17 are arranged between the plate 13 and the edge 10A of the opening, the edge 12A of the cylinder 12 and the surface 2S of the ceiling 2. These seals 17 are designed as mats. Lines with equivalent properties can also be used as seals. With the help of the seals 17 is prevented that gases 30 can escape from the deglor furnace 1 to the outside.
  • the heating element 3 is mounted on the surface of the plate 13 in such a way that the flange 4F, which surrounds the protective tube 4, is placed on the plate 13. Due to the weight of the protective tube 4, the plate 13 is pressed against the cylinder 12 and the edge 10A of the opening 10, so that a further sealing of the deglor furnace 1 is thereby achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Furnace Details (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
EP95120112A 1994-12-24 1995-12-19 Four électrique à résistance Expired - Lifetime EP0718577B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4446530A DE4446530A1 (de) 1994-12-24 1994-12-24 Deglorofen
DE4446530 1994-12-24

Publications (3)

Publication Number Publication Date
EP0718577A2 true EP0718577A2 (fr) 1996-06-26
EP0718577A3 EP0718577A3 (fr) 1997-06-04
EP0718577B1 EP0718577B1 (fr) 1999-12-22

Family

ID=6537067

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95120112A Expired - Lifetime EP0718577B1 (fr) 1994-12-24 1995-12-19 Four électrique à résistance

Country Status (4)

Country Link
US (1) US5809056A (fr)
EP (1) EP0718577B1 (fr)
JP (1) JPH08210620A (fr)
DE (2) DE4446530A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19960879A1 (de) * 1999-12-17 2001-07-12 Abb Patent Gmbh Prüfeinrichtung
DE10237759A1 (de) * 2002-08-17 2004-02-26 Sms Demag Ag Elektrode sowie Verfahren zu deren Anordnung in Elektro-Lichtbogenöfen
US20080130704A1 (en) * 2006-11-30 2008-06-05 Lapoint Albert E Electroslag smelting system and method

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE717668C (de) * 1937-06-12 1942-02-20 Siemens Planiawerke Ag Elektroofen mit elektrischen Widerstandsheizkoerpern
GB909031A (en) * 1958-01-22 1962-10-24 Wild Barfield Electr Furnaces Improvements in electric heating elements for furnaces
FR1393081A (fr) * 1964-05-12 1965-03-19 Morganite Thermal Designs Ltd Four électrique, notamment pour la fusion des métaux
DE2854943A1 (de) * 1977-12-23 1979-06-28 Alco Standard Corp Heizvorrichtung mit schutzgassystem
US4179603A (en) * 1977-11-21 1979-12-18 The Electric Furnace Company Radial blade heating device
US5120027A (en) * 1991-04-26 1992-06-09 Union Carbide Industrial Gases Technology Corporation Heater arrangement for aluminum refining systems
JPH0699054A (ja) * 1992-09-24 1994-04-12 Mitsubishi Heavy Ind Ltd カーシュレッダダスト燃焼灰の処理方法
FR2699038A1 (fr) * 1992-12-08 1994-06-10 Electricite De France Canne thermoplongeante pour le chauffage électrique de produits fusibles et son application notamment à l'aluminium.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2735881A (en) * 1956-02-21 Metal-impregnated heating rods for electric
US1662555A (en) * 1926-12-18 1928-03-13 Wojciechowski Edward Universal bottle heater
US3009974A (en) * 1958-04-26 1961-11-21 Ingenior Gunnar Schjelderup In Electric furnace
US4056678A (en) * 1976-02-20 1977-11-01 Sola Basic Industries, Inc. Electric heating furnace
US4080510A (en) * 1976-11-18 1978-03-21 Btu Engineering Corporation Silicon carbide heater
US4259538A (en) * 1980-01-31 1981-03-31 Jones William R Vacuum furnace arrangement having an improved heating element mounting means
US4379382A (en) * 1980-06-02 1983-04-12 Sauder Industries, Inc. Method and apparatus for insulating a furnace having a corrosive atmosphere
DE4328718A1 (de) * 1993-08-26 1995-03-02 Abb Gadelius K K Heizelement

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE717668C (de) * 1937-06-12 1942-02-20 Siemens Planiawerke Ag Elektroofen mit elektrischen Widerstandsheizkoerpern
GB909031A (en) * 1958-01-22 1962-10-24 Wild Barfield Electr Furnaces Improvements in electric heating elements for furnaces
FR1393081A (fr) * 1964-05-12 1965-03-19 Morganite Thermal Designs Ltd Four électrique, notamment pour la fusion des métaux
US4179603A (en) * 1977-11-21 1979-12-18 The Electric Furnace Company Radial blade heating device
DE2854943A1 (de) * 1977-12-23 1979-06-28 Alco Standard Corp Heizvorrichtung mit schutzgassystem
US5120027A (en) * 1991-04-26 1992-06-09 Union Carbide Industrial Gases Technology Corporation Heater arrangement for aluminum refining systems
JPH0699054A (ja) * 1992-09-24 1994-04-12 Mitsubishi Heavy Ind Ltd カーシュレッダダスト燃焼灰の処理方法
FR2699038A1 (fr) * 1992-12-08 1994-06-10 Electricite De France Canne thermoplongeante pour le chauffage électrique de produits fusibles et son application notamment à l'aluminium.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 018, no. 371 (C-1224), 13.Juli 1994 & JP 06 099054 A (MITSUBISHI HEAVY IND LTD;OTHERS: 01), 12.April 1994, *

Also Published As

Publication number Publication date
EP0718577A3 (fr) 1997-06-04
EP0718577B1 (fr) 1999-12-22
DE59507480D1 (de) 2000-01-27
DE4446530A1 (de) 1996-06-27
US5809056A (en) 1998-09-15
JPH08210620A (ja) 1996-08-20

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