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EP0590371B1 - Buse à air secondaire pour foyers - Google Patents

Buse à air secondaire pour foyers Download PDF

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Publication number
EP0590371B1
EP0590371B1 EP93114442A EP93114442A EP0590371B1 EP 0590371 B1 EP0590371 B1 EP 0590371B1 EP 93114442 A EP93114442 A EP 93114442A EP 93114442 A EP93114442 A EP 93114442A EP 0590371 B1 EP0590371 B1 EP 0590371B1
Authority
EP
European Patent Office
Prior art keywords
air nozzle
secondary air
pins
protective strip
protective
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
EP93114442A
Other languages
German (de)
English (en)
Other versions
EP0590371A1 (fr
Inventor
Walter Josef Dipl.-Ing. Martin
Johannes Josef Edmund Dipl.-Ing. Martin
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.)
Martin GmbH fuer Umwelt und Energietechnik
Original Assignee
Martin GmbH fuer Umwelt und Energietechnik
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 Martin GmbH fuer Umwelt und Energietechnik filed Critical Martin GmbH fuer Umwelt und Energietechnik
Publication of EP0590371A1 publication Critical patent/EP0590371A1/fr
Application granted granted Critical
Publication of EP0590371B1 publication Critical patent/EP0590371B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel 
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S239/00—Fluid sprinkling, spraying, and diffusing
    • Y10S239/19—Nozzle materials

Definitions

  • the invention relates to a second air nozzle for furnaces with a curved base body, which is provided with pins for holding a ceramic protective jacket.
  • the object of the invention is to increase the protective effect against corrosion and mechanical destruction with a simple construction of the second air nozzle.
  • a protective strip which projects radially from the base body and extends in the radial direction is arranged along the longest curved line, starting from the nozzle mouth to beyond the curved part corresponds at least to the thickness of the ceramic protective jacket.
  • the arrangement of this protective strip which runs at least flush with the ceramic protective jacket or protrudes above it, protects the ceramic protective jacket against mechanical destruction caused by fuel parts pushed past, in particular waste parts.
  • the protective strip can be designed as a flat, radially projecting rib.
  • the protective strip has pins projecting at right angles from the rib.
  • a preferred embodiment is that the protective strip is T-shaped with a radially outer transverse web. This not only increases the protective surface that comes into contact with the fuel parts due to the crossbar, but also better anchoring of the ceramic protective jacket in this area is achieved, since the ceramic protective compound is molded in behind the crossbar and held by it.
  • the pins arranged on the base body are arranged in horizontally running planes, starting from the installed position of the secondary air nozzle, this not only achieves a particularly good holding effect with respect to the ceramic protective jacket, but also creates the conditions for a further advantageous embodiment , which consists in that the pins and the protective strip are made in one piece with the base body by casting.
  • the manufacturing costs of such a second air nozzle are significantly reduced compared to the previous design, in which the pins were welded on individually.
  • FIG. 1 The extremely schematic illustration in FIG. 1 has been chosen to show the location at which a second air nozzle according to the invention is arranged.
  • This figure shows a firing system with a feed hopper 1 and a feed chute 2 through which the fuel, preferably waste, falls onto a feed table 3, on the loading piston 4 pushing the waste over the loading edge 5 of the feed table 3 onto a firing grate 6.
  • the firing material lying on the firing grate 6 is designated 7 and is slowly conveyed to a slag chute 8 where the burned-out slag falls into a deslagger 9.
  • the combustion gases rising from the grate reach an upwardly directed combustion chamber 10, the main mass of the combustion air being supplied to the grate 6 from below through a line 11.
  • two second air nozzles 13 are provided in the rear wall 12, while a second air nozzle 15 is provided in the wall 14 opposite the loading edge 5.
  • the secondary air nozzles are supplied with air through pipes.
  • the second air nozzle 15 is designed in an arc shape and is used to supply combustion air to the area which is located approximately above the loading edge 5 of the feed table 3. There is a particularly strong one in this area Concentration of aggressive carbonization gases.
  • the second air nozzle is curved so that it blows into the combustion chamber 10 in the direction of the fuel flow.
  • FIGS. 2 to 4 show a first embodiment of a second air nozzle
  • FIGS. 5 and 6 show a second embodiment of such a second air nozzle, which is designated by 15 in FIG.
  • the second air nozzle 15 consists of a base body 16 which tapers towards the nozzle mouth 17 and, starting from a short connecting piece 18, is curved, preferably curved at 75 °.
  • a protective strip 19 is integrally formed with the base body 16 along the longest curved line. In the installed state, this protective strip 19 is located on the underside of the second air nozzle.
  • pins 20 are made in one piece with the base body 16 on both sides of the base body 16, which pins lie in horizontal planes when the nozzle is installed.
  • Other pins 21, which are also in the installed state of the nozzle in horizontal planes, are made in one piece with the protective strip 19.
  • the base body 16, the protective strip 19 and the pins 20 and 21 are made in one piece by casting.
  • the pins 20 and 21 are used to hold a ceramic protective jacket 27 surrounding the base body 16, which surrounds the base body on all sides and in a thickness that the protective strip 19 is flush with its outer surface 22 with the ceramic protective jacket. Since the protective strip 19 protrudes downward into the combustion chamber when the secondary air nozzle 15 is installed, it can protect the ceramic protective jacket 27 against mechanical damage caused by waste being pushed past.
  • the base body 16 and the cast-on pins 20 are designed in the same way as in the embodiment according to FIGS. 2 to 4.
  • the only change consists in the configuration of the protective strip, which in this embodiment, in particular can be seen from Figure 6, T-shaped and is designated by the reference numeral 23 as a whole.
  • the web projecting radially from the base body 16 is designated with 24 and the cross web extending at right angles thereto and projecting on both sides over the web 24 with 25, the ceramic mass molded around the base body 16 being held by the pins 20 and the cross web 25 of the protective strip 23 .
  • the ceramic protective jacket 27 is shaped so that at least the outer surface 26 of the crossbar 25 is exposed and the Ceramic protective jacket protects against wear due to hard parts being pushed past.
  • This large surface area of the protective strip 23 is made possible in spite of strong exposure to heat in that it is made in one piece with the base body and is thus in good heat-conducting connection with the base body in which cool combustion air flows, so that despite the strong heat radiation of the crossbar 25 of the protective strip 23 none takes on too high temperatures.
  • the protective effect is greater due to the crossbar 25 than with the protective strip 19, which is relatively narrow.
  • the crosspiece 25 provides a particularly good holder for the ceramic protective jacket 27 molded onto the base body 16, which is indicated by dashed lines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Gas Burners (AREA)
  • Air Supply (AREA)
  • Nozzles (AREA)
  • Coating With Molten Metal (AREA)

Claims (6)

  1. Busette d'introduction d'air additionnel pour des fours, comportant un corps de base (16) garni de broches (20) pour la fixation d'une enveloppe protectrice en céramique (27), caractérisée en ce qu'une bande de protection (19, 23) qui fait saillie radialement à partir du corps de base (16) et dont la dimension dans la direction radiale correspond au moins à l'épaisseur de l'enveloppe protectrice en céramique (27) est disposée le long de la ligne de courbure la plus longue, à partir de la bouche (17) de la busette, sur la partie cintrée et vers l'extérieur.
  2. Busette d'introduction d'air additionnel selon la revendication 1, caractérisée en ce que la bande de protection (19) est en forme de nervure plate faisant saillie radialement.
  3. Busette d'introduction d'air additionnel selon la revendication 2, caractérisée en ce que la bande de protection (19) présente des broches (21) qui font saillie perpendiculairement à la nervure.
  4. Busette d'introduction d'air additionnel selon la revendication 1, caractérisée en ce que la bande de protection (23) a la forme d'un T avec une barre transversale (25) située radialement à l'extérieur.
  5. Busette d'introduction d'air additionnel selon l'une des revendications 1 à 4, caractérisée en ce que les broches (20) disposées sur le corps de base (16) sont disposées dans des plans qui se développent horizontalement lorsque la busette d'introduction d'air (15) est montée.
  6. Busette d'introduction d'air additionnel selon l'une des revendications 1 à 5, caractérisée en ce que les broches (20, 21) et la bande de protection (19, 23) sont fabriquées par moulage, d'une seule pièce avec le corps de base (16).
EP93114442A 1992-09-28 1993-09-08 Buse à air secondaire pour foyers Expired - Lifetime EP0590371B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4232488A DE4232488C1 (de) 1992-09-28 1992-09-28 Zweitluftdüse für Feuerungen
DE4232488 1992-09-28

Publications (2)

Publication Number Publication Date
EP0590371A1 EP0590371A1 (fr) 1994-04-06
EP0590371B1 true EP0590371B1 (fr) 1995-02-08

Family

ID=6469036

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93114442A Expired - Lifetime EP0590371B1 (fr) 1992-09-28 1993-09-08 Buse à air secondaire pour foyers

Country Status (9)

Country Link
US (1) US5339753A (fr)
EP (1) EP0590371B1 (fr)
JP (1) JPH07109300B2 (fr)
AT (1) ATE118266T1 (fr)
BR (1) BR9303921A (fr)
CA (1) CA2107024C (fr)
DE (1) DE4232488C1 (fr)
DK (1) DK0590371T3 (fr)
ES (1) ES2051257T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19843991C2 (de) * 1998-09-25 2002-08-14 Juenger & Graeter Gmbh Feuerfe Zünddeckennase
US20080163803A1 (en) * 2006-12-22 2008-07-10 Covanta Energy Corporation Method and systems to control municipal solid waste density and higher heating value for improved waste-to-energy boiler operation
JP6061547B2 (ja) * 2012-08-10 2017-01-18 コクヨ株式会社 送風機

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2268279A (en) * 1939-09-12 1941-12-30 William S Debenham Refractory nozzle
JPS62153613A (ja) * 1985-12-26 1987-07-08 Chubu Electric Power Co Inc セラミック製バーナチップ
DE4102072A1 (de) * 1991-01-24 1992-07-30 Martin Umwelt & Energietech Verfahren und duese zum zufuehren von sekundaerluft
ATE105396T1 (de) * 1991-02-07 1994-05-15 Martin Umwelt & Energietech Verfahren zur verbrennungsluftzufuehrung und feuerungsanlage.

Also Published As

Publication number Publication date
CA2107024A1 (fr) 1994-03-29
DK0590371T3 (da) 1995-07-03
ES2051257T3 (es) 1995-06-01
ES2051257T1 (es) 1994-06-16
JPH07109300B2 (ja) 1995-11-22
DE4232488C1 (de) 1993-12-23
CA2107024C (fr) 1996-10-08
ATE118266T1 (de) 1995-02-15
JPH06229533A (ja) 1994-08-16
EP0590371A1 (fr) 1994-04-06
BR9303921A (pt) 1994-04-05
US5339753A (en) 1994-08-23

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