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EP0636838A2 - Four de crémation à chauffage électrique - Google Patents

Four de crémation à chauffage électrique Download PDF

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Publication number
EP0636838A2
EP0636838A2 EP94110707A EP94110707A EP0636838A2 EP 0636838 A2 EP0636838 A2 EP 0636838A2 EP 94110707 A EP94110707 A EP 94110707A EP 94110707 A EP94110707 A EP 94110707A EP 0636838 A2 EP0636838 A2 EP 0636838A2
Authority
EP
European Patent Office
Prior art keywords
heating
furnace
cremation
radiator
legs
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.)
Withdrawn
Application number
EP94110707A
Other languages
German (de)
English (en)
Other versions
EP0636838A3 (fr
Inventor
Antonio Bruno Broggi
Hans Werner Peter
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.)
ABB AG Germany
Original Assignee
ABB Management AG
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 Management AG filed Critical ABB Management AG
Publication of EP0636838A2 publication Critical patent/EP0636838A2/fr
Publication of EP0636838A3 publication Critical patent/EP0636838A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
    • F23G5/10—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G1/00—Furnaces for cremation of human or animal carcasses

Definitions

  • the invention relates to a cremation furnace with electric heating, with a main combustion chamber formed in the furnace vault, a post-combustion chamber, the heating elements consisting of radiators with two power connections each, which are arranged in heating channels provided for this purpose in the supporting structure of the furnace vault, which heating channels by shaped stones are formed.
  • the invention relates to a state of the art, as it results for example from CH-PS 584 866 or GB-1,529,241 with the same content.
  • Known cremation ovens have an electrically heated main combustion chamber.
  • the combustion gases generated during the cremation pass from there down to an ash collection room and then through afterburning ducts into the chimney.
  • the combustion chamber and the afterburning ducts are generally heated by electrical heating elements which are arranged in the furnace wall.
  • electrical heating elements which are arranged in the furnace wall.
  • specially designed breakthrough stones made of refractory material, so-called spiral supporting stones are integrated into the furnace wall, which form approximately horizontal channels that pass through the furnace in the longitudinal direction for receiving the heating elements.
  • interchangeable electric heating elements are arranged in the afterburning ducts.
  • These radiators are made to the dimensions of these ducts and can be easily installed and removed as a whole through the duct openings, so they are not part of the load-bearing structure. They consist of highly heat-resistant heating coils, which are embedded in shaped, all-round closed radiator supports made of highly refractory stone that are joined without mortar.
  • the heating elements for the main and also for the afterburning chamber are U-shaped and essentially consist of a core made of refractory insulating material, onto which a heating conductor is wound in a spiral or helical manner.
  • Each leg lies in its own channel, as is indicated in the upper half of FIG. 1 of the CH or GB patent cited at the beginning.
  • the furnace construction must be designed in such a way that access to the ducts arranged in pairs is ensured from both ends of the furnace.
  • Replacing a defective heating element when the furnace is hot is practically impossible because the furnace has to be opened on both sides. If the duct is damaged, it is also not sensible to replace the heating element, since it is open to the inside of the furnace and therefore burns in a very short time.
  • demoting a defective heating element is often impossible because the heating element is baked with the refractory material surrounding it.
  • the invention has for its object to provide a cremation furnace, the heating elements can be replaced easily and economically in virtually all circumstances.
  • heating ducts are only open on one side of the furnace, and that the return conductor of each radiator runs in the same heating duct as the radiator itself back to the open side of the heating duct.
  • heating elements are independent components or modules in cremation ovens, as is shown in the patents cited at the beginning, the focus here is on the possibility of retrofitting ovens which have no heatable afterburning ducts.
  • electric radiators built into the walls can be used, although no information about the structure of the heating elements can be found for this variant.
  • the actual heating conductor is designed as a heating coil, and the return conductor - distanced and electrically insulated from it - runs inside the heating coil back to the "open" furnace side.
  • Reference number 5 denotes an ash plate, 6 a rust stone, reference number 7 a middle flue gas duct and with 8 post-combustion channels.
  • Air ducts for the ash plate ventilation have the reference number 9, electric heaters for the main combustion chamber 3 the number 10 and electric heaters for the post-combustion ducts 8 the number 11.
  • the cremation furnace is essentially formed by the furnace lining 1, which is surrounded by the furnace insulation 2.
  • Various rooms and channels are formed in the brick lining 1.
  • the main combustion chamber 3 intended for the coffin, which is heated by electric radiators 10 and is separated from the afterburning chamber 4 by the grate stones 6.
  • the afterburning chamber 4 also serves as an ash collecting chamber.
  • the bottom of the afterburning chamber 4 is formed by the ash plate 5, under which the middle smoke duct 7 is located.
  • Laterally next to the afterburning chamber 4 and the middle smoke duct 7, afterburning ducts 8 are formed in the furnace lining, which can be heated by the radiators 11.
  • the air ducts 9 for the ash plate ventilation which lie laterally from the ash plate 5 and which are connected to the post-combustion chamber 4 via nozzles 12.
  • the heating channels 14, which are formed in shaped stones 13 (also called spiral supporting stones), are prefabricated, replaceable radiators inserted, as shown in Fig.2 and the detail X from Fig.1.
  • heating coils 15 which are arranged around a hollow tubular coil carrier 16 made of highly heat-resistant insulating material, for example ceramic.
  • This coil carrier 16 is provided on the connection side O of the furnace with a metallic contact tube 17.
  • the end of the heating coil 15 facing the open furnace side is welded to the contact tube 17, the welding points are designated by 18.
  • the contact tube 17 forms an electrical power connection of the radiator.
  • the other power connection of the radiator is a solid metal rod 19, which extends inside the coil carrier 16 to the inner end of the radiator. This forms the return conductor of the radiator.
  • the metal rod 19 is mechanically and electrically connected, preferably welded, to the inner end of the heating coil 15 (welding points 18 ').
  • the radiator constructed in the manner just described is dimensioned in the outer circumference in such a way that it can be inserted into the heating channel 14 with play.
  • the radiator can be installed in existing furnace systems. With fused heating coils 15, a radiator can be replaced in undamaged heating channels, and furnace operation can then be maintained with (possibly) reduced output.
  • the invention provides for the radiator shown in FIG. 2 to be installed in a ceramic protective tube 21, as shown in FIG.
  • This protective tube lies with play S in the heating duct 14 and extends over the entire length of the radiator.
  • a fusion of the heating coil with the shaped stone 13 is no longer possible. This ensures that the radiator is always replaced. If the shaped blocks 13 are damaged, the insulation of the heating coil 15 with respect to the combustion chamber is ensured. This significantly increases the lifespan of the radiators and makes it possible to repair defective molded blocks for the first time.
  • the heating coil is U-shaped or hairpin-shaped. It consists of two legs 15a and 15b which are connected to one another at the inner end by a connecting piece 15c.
  • a middle insulation 22 made of a highly heat-resistant material, e.g. Ceramic, provided, which is similar in cross-section to a double-concave lens (Fig. 5) and extends over the entire length of the radiator.
  • Both legs 14a, 15b together with central insulation 22 are made of a protective tube 21a made of highly refractory material, e.g. Ceramic, surrounded.
  • the legs 15a, 15b are provided with a metallic contact tube 17a or 17b.
  • the contact tubes 17a, 17b are supported and spaced apart from the protective tube 21a and also the central insulation 22 by seals 23 made of glass cord.
  • the radiator shown in FIGS. 4 and 5 is also inserted as a prefabricated structural unit in the heating duct 14a, which in this case has an oval cross section, in the shaped blocks 13 with play S. If necessary, the protective tube 21a can be omitted.
  • the molded block must be adapted to the oval cross-section of the radiator - it is therefore not suitable for retrofitting furnaces with heating channels with a circular cross-section, but the advantages, namely protection of the heating coil, also outweigh here in the case of defective molded blocks, replacement from one side even when the furnace is hot, longer service life of the radiators and the possibility of repairing molded blocks.
  • a heating element is arranged, the heating coil of which consists of an outgoing conductor 15d and a return conductor 15e, which are bifilarly wound, that is, seen from the outside of the furnace, the outgoing conductor 15d forms a left-hand spiral, and the return conductor 15e forms a right-hand spiral.
  • the two coils are electrically and mechanically connected to one another by means of connecting pieces 15f.
  • the conductors 15d and 15e run in a two-part cylindrical molded part 23, consisting of two semi-cylindrical molded part halves 23a and 23b. This molded part fixes both the heating elements and their power connections 19. Grooves are provided in the flat separating surfaces, into which the conductors 15d, 15e are approximately half immersed. Both the cross section of the conductors 15d, 15e and that of the said grooves are rectangular, which acts as an anti-rotation device.
  • the heating duct 14 is sealed off from the outside by means of a high-temperature-resistant adhesive 24, for example fiberglass.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)
EP94110707A 1993-07-29 1994-07-09 Four de crémation à chauffage électrique. Withdrawn EP0636838A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4325422 1993-07-29
DE19934325422 DE4325422A1 (de) 1993-07-29 1993-07-29 Kremationsofen mit elektrischer Beheizung

Publications (2)

Publication Number Publication Date
EP0636838A2 true EP0636838A2 (fr) 1995-02-01
EP0636838A3 EP0636838A3 (fr) 1995-08-09

Family

ID=6493970

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94110707A Withdrawn EP0636838A3 (fr) 1993-07-29 1994-07-09 Four de crémation à chauffage électrique.

Country Status (2)

Country Link
EP (1) EP0636838A3 (fr)
DE (1) DE4325422A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1002994A1 (fr) * 1998-11-20 2000-05-24 Messer Griesheim Gmbh Appareil et procédé de crémation
FR2801094A1 (fr) 1999-11-15 2001-05-18 South East Ind Dev Ltd Dispositif de cremation
WO2003012338A1 (fr) * 2001-08-01 2003-02-13 Ecological Power International (Holdings) Limited Appareil destine a la pyrolyse de dechets
EP3301359A2 (fr) 2016-09-28 2018-04-04 Bürge-Fischer Ag Four de crémation à chauffage et à combustion améliorés

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB511515A (en) * 1937-11-16 1939-08-21 Friedrich Essmann Improvements in and relating to electric resistance furnaces
US2798928A (en) * 1955-01-04 1957-07-09 Waste King Corp Electric incinerator heating unit
GB895931A (en) * 1958-01-24 1962-05-09 Ernest Percy Buckle Improvements relating to incinerators
CH584866A5 (fr) * 1975-05-02 1977-02-15 Bbc Brown Boveri & Cie
US4401883A (en) * 1981-08-14 1983-08-30 The Kanthal Corporation Electric resistance heater
FR2600855B1 (fr) * 1986-06-26 1988-08-05 Electricite De France Dispositif de chauffage electrique comportant une gaine metallique

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1002994A1 (fr) * 1998-11-20 2000-05-24 Messer Griesheim Gmbh Appareil et procédé de crémation
DE19853572A1 (de) * 1998-11-20 2000-05-25 Messer Griesheim Gmbh Vorrichtung und Verfahren zur Feuerbestattung
FR2801094A1 (fr) 1999-11-15 2001-05-18 South East Ind Dev Ltd Dispositif de cremation
WO2001036875A1 (fr) 1999-11-15 2001-05-25 South East Industrial Development Ltd. Dispositif de cremation
WO2003012338A1 (fr) * 2001-08-01 2003-02-13 Ecological Power International (Holdings) Limited Appareil destine a la pyrolyse de dechets
EP3301359A2 (fr) 2016-09-28 2018-04-04 Bürge-Fischer Ag Four de crémation à chauffage et à combustion améliorés

Also Published As

Publication number Publication date
DE4325422A1 (de) 1995-02-02
EP0636838A3 (fr) 1995-08-09

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