EP0296949B1 - Fire- or incinerator-bar, particularly for a reciprocating grate - Google Patents

Fire- or incinerator-bar, particularly for a reciprocating grate Download PDF

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Publication number
EP0296949B1
EP0296949B1 EP88401522A EP88401522A EP0296949B1 EP 0296949 B1 EP0296949 B1 EP 0296949B1 EP 88401522 A EP88401522 A EP 88401522A EP 88401522 A EP88401522 A EP 88401522A EP 0296949 B1 EP0296949 B1 EP 0296949B1
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EP
European Patent Office
Prior art keywords
bar
cavity
nose
opening
wall
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
EP88401522A
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German (de)
French (fr)
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EP0296949A1 (en
Inventor
Jean-Pierre Durand
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.)
CNIM Groupe SA
Original Assignee
Constructions Industrielles de la Mediterrane CNIM SA
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 Constructions Industrielles de la Mediterrane CNIM SA filed Critical Constructions Industrielles de la Mediterrane CNIM SA
Priority to AT88401522T priority Critical patent/ATE58961T1/en
Publication of EP0296949A1 publication Critical patent/EP0296949A1/en
Application granted granted Critical
Publication of EP0296949B1 publication Critical patent/EP0296949B1/en
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
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H17/00—Details of grates
    • F23H17/12—Fire-bars

Definitions

  • the subject of the present invention is a rod of a combustion or incineration grid, in particular of a grid with a backward movement, of the type comprising a ringing nose having a substantially truncated pyramidal shape and at least one air distribution orifice. combustion, provided in the wall of the nose.
  • the two bars of this type have a number of considerable drawbacks.
  • elements of a fuel or combustion residues in particular molten metals, can be introduced into the distribution holes d air thus causing the obstruction of these and therefore an adjustment of the air distribution.
  • this bar as indeed in all known designs of bars, although the distribution of air over the entire surface of the grid by creating a large pressure drop in the dispensing orifice is good, it still turns out that the combustion air is introduced into the fuel layer at a high speed, which has the effect of raising a large amount of dust and causing a lot of fly ash in the fumes .
  • the present invention aims to overcome these drawbacks.
  • the grid bar proposed by the invention for this purpose is characterized in that the ringing nose has in its wall perpendicular to the longitudinal median plane and normal to the upper face of the bar and located on the side remote from the upstream end a portion central set back towards the inside of the nose, which forms a cavity opening in the direction of the axis of the bar, at least one side wall delimiting the cavity has the air distribution orifice and the wall delimiting the cavity downstream has an opening whose cross section is several times greater than the cross section of the lateral orifice.
  • the side walls of the cavity extend substantially vertically relative to the upper surface of the bar while the upper delimitation surface of the cavity is substantially parallel to this upper surface.
  • an air distribution orifice is formed in at least one of the parallel side walls of the cavity.
  • the dispensing orifice passing through a side wall of the coring nose cavity extends perpendicular to the median plane perpendicular to the upper surface of the bar.
  • the axis of a dispensing orifice formed in a side wall of the cavity of the nerlingage nose is inclined relative to the median plane perpendicular to the upper surface of the bar so as to allow the machining after the realization of the bar, this orifice.
  • a grating bar 1 has an upstream end 2 provided with a ringing nose 3 intended to stir the layer of a fuel during its movement from one end to the other. from the hearth on the grill.
  • the ringing nose 3 has a substantially truncated pyramidal shape.
  • the latter is delimited laterally by walls 6 substantially perpendicular to the upper surface 7 of the bar while the bottom of the cavity is formed by a perpendicular transverse wall 8.
  • the cavity 5 is delimited upwards by a surface 9 substantially parallel to the upper surface 7 of the bar.
  • the cavity 5 is in communication with the hollow interior of the nose by means of two orifices 10 each made in one of the side walls 6.
  • the cavity 5 also communicates with the upper part of the grid by an opening 11 provided in the wall delimiting the surface 4 of the cavity.
  • the cross section of the opening 11 is several times greater than the cross section of the orifices 10.
  • passages 10 and the orifice 11 allow the combustion air blown into the nose from the underside of the bar to reach the fuel layer located on the bars.
  • the interposition of the cavity 5 in the air path makes it possible to distribute the air uniformly throughout the bars, thanks to the orifices 10 in which the speed of the air is high, to place the orifices 10 inside the cavity 5, therefore protected from obstructions by waste or molten metal drips and in addition to ensuring a reduction in the speed of air and its introduction into the layer of a fuel without entrainment of dust.
  • each bar according to the present invention can be provided with a single ringing nose as shown in the figures or with several noses transversely juxtaposed, in the case of a bar of greater width.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Fertilizers (AREA)
  • Solid-Fuel Combustion (AREA)
  • Lubricants (AREA)
  • Gas Burners (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
  • Baking, Grill, Roasting (AREA)

Abstract

The bar is characterised in that its poking nose comprises in its wall, which is perpendicular to the central longitudinal plane of the bar and situated on the distant side of the end, a central part set back towards the interior of the nose, which forms a cavity (5) which opens in the direction of the axis of the bar, at least one lateral wall delimiting the cavity (5) has an orifice (10) for air distribution and the surface (9) delimiting the cavity (5) in the downstream direction has an opening, the transverse cross-section of which is a number of times greater than the transverse cross-section of the lateral orifice (10). <IMAGE>

Description

La présente invention a pour objet un barreau de grille de combustion ou d'incinération, notamment de grille à mouvement de recul, du type comportant un nez de ringardage présentant une forme sensiblement tronc-pyramidale et au moins un orifice de distribution d'air de combustion, pourvu dans la paroi du nez.The subject of the present invention is a rod of a combustion or incineration grid, in particular of a grid with a backward movement, of the type comprising a ringing nose having a substantially truncated pyramidal shape and at least one air distribution orifice. combustion, provided in the wall of the nose.

Dans un barreau connu de ce type (voir FR-A 1 567 605), un tel orifice de distribution de l'air est pratiqué soit sur l'une ou sur les deux faces latérales du nez de ringardage.In a known bar of this type (see FR-A 1 567 605), such an air distribution orifice is formed either on one or on the two lateral faces of the tacking nose.

Les deux barreaux de ce type présentent un certain nombre d'inconvénients considérables. Ainsi, pour une grille à mouvement de recul, lors du mouvement de descente des barreaux vers l'arrière, des éléments d'un combustible ou des résidus de combustion, en particulier les métaux fondus, peuvent s'introduire dans les trous de distribution d'air entraînant ainsi l'obstruction de ceux-ci et donc un déréglage de la distribution d'air. De plus, dans ce barreau, comme d'ailleurs dans toutes les conceptions connues de barreaux, bien que la répartition de l'air sur toute la surface de la grille par création d'une grande perte de charge dans l'orifice de distribution soit bonne, il s'avère tout de même que l'air de combustion est introduit dans la couche de combustible à une grande vitesse, ce qui a pour effet de soulever und grande quantité de poussière et d'entraîner beaucoup de cendres volantes dans les fumées.The two bars of this type have a number of considerable drawbacks. Thus, for a grid with backward movement, during the downward movement of the bars towards the rear, elements of a fuel or combustion residues, in particular molten metals, can be introduced into the distribution holes d air thus causing the obstruction of these and therefore an adjustment of the air distribution. In addition, in this bar, as indeed in all known designs of bars, although the distribution of air over the entire surface of the grid by creating a large pressure drop in the dispensing orifice is good, it still turns out that the combustion air is introduced into the fuel layer at a high speed, which has the effect of raising a large amount of dust and causing a lot of fly ash in the fumes .

La présente invention a pour but de pallier ces inconvénients.The present invention aims to overcome these drawbacks.

Le barreau de grille proposé par l'invention à cette fin est caractérisé en ce que le nez de ringardage comporte dans sa paroi perpendiculaire au plan médian longitudinal et normal à la face supérieure du barreau et située du côté éloigné de l'extrémité amont une partie centrale en retrait vers l'intérieur du nez, qui forme une cavité s'ouvrant dans la direction de l'axe du barreau, au moins une paroi latérale délimitant la cavité présente l'orifice de distribution d'air et la paroi délimitant la cavité vers l'aval présente une ouverture dont la section transversale est plusieurs fois supérieure à la section transversale de l'orifice latéral.The grid bar proposed by the invention for this purpose is characterized in that the ringing nose has in its wall perpendicular to the longitudinal median plane and normal to the upper face of the bar and located on the side remote from the upstream end a portion central set back towards the inside of the nose, which forms a cavity opening in the direction of the axis of the bar, at least one side wall delimiting the cavity has the air distribution orifice and the wall delimiting the cavity downstream has an opening whose cross section is several times greater than the cross section of the lateral orifice.

Selon une caracétristique avantageuse de l'invention, les parois latérales de la cavité s'étendent sensiblement verticalement par rapport à la surface supérieure du barreau tandis que la surface supérieure de délimitation de la cavité est sensiblement parallèle à cette surface supérieure.According to an advantageous characteristic of the invention, the side walls of the cavity extend substantially vertically relative to the upper surface of the bar while the upper delimitation surface of the cavity is substantially parallel to this upper surface.

Selon encore une autre caractéristique avantageuse de l'invention, un orifice de distribution d'air est pratiqué dans l'une au moins des parois latérales parallèles de la cavité.According to yet another advantageous characteristic of the invention, an air distribution orifice is formed in at least one of the parallel side walls of the cavity.

Selon une autre caractéristique avantageuse de l'invention, l'orifice de distribution traversant une paroi latérale de la cavité de nez de ringardage s'étend perpendiculairement au plan médian perpendiculaire à la surface supérieure du barreau.According to another advantageous characteristic of the invention, the dispensing orifice passing through a side wall of the coring nose cavity extends perpendicular to the median plane perpendicular to the upper surface of the bar.

Selon encore une autre caractéristique de l'invention, l'axe d'un orifice de distribution pratiqué dans une paroi latérale de la cavité du nez de ringardage est incliné par rapport au plan médian perpendiculaire à la surface supérieure du barreau de façon à permettre l'usinage postérieur à la réalisation du barreau, de cet orifice.According to yet another characteristic of the invention, the axis of a dispensing orifice formed in a side wall of the cavity of the nerlingage nose is inclined relative to the median plane perpendicular to the upper surface of the bar so as to allow the machining after the realization of the bar, this orifice.

L'invention sera mieux comprise, et d'autres buts, caractéristiques, détails et avantages de celle-ci apparaîtront plus clairement au cours de la description explicative qui va suivre faite en référence aux dessins schématiques annexés donnés uniquement à titre d'exemple illustrant un mode de réalisation de l'invention, et dans lequel:

  • la figure 1 est une vue en élévation d'un barreau de grille selon la présente invention ;
  • la figure 2 est une vue de dessus d'une barreau selon l'invention ;
  • la figure 3 est une vue en coupe longitudinale selon la ligne III-III de la figure 2 ; et
  • les figures 4 et 5 sont des vues en coupe selon la ligne IV, V -IV, V de la figure 3 et montrent deux variantes de réalisation des orifices de distribution d'air, selon la présente invention.
The invention will be better understood, and other objects, characteristics, details and advantages thereof will appear more clearly during the explanatory description which follows, made with reference to the appended schematic drawings given solely by way of example illustrating a embodiment of the invention, and in which:
  • Figure 1 is an elevational view of a grate bar according to the present invention;
  • Figure 2 is a top view of a bar according to the invention;
  • Figure 3 is a longitudinal sectional view along the line III-III of Figure 2; and
  • Figures 4 and 5 are sectional views along line IV, V -IV, V of Figure 3 and show two alternative embodiments of the air distribution orifices, according to the present invention.

En se référant aux figures, on constate qu'un barreau de grille 1 comporte une extrémité amont 2 pourvue d'un nez de ringardage 3 destiné à brasser la couche d'un combustible au cours de son déplacement d'une extrémité à l'autre du foyer sur la grille.Referring to the figures, it can be seen that a grating bar 1 has an upstream end 2 provided with a ringing nose 3 intended to stir the layer of a fuel during its movement from one end to the other. from the hearth on the grill.

Le nez de ringardage 3 présente une forme sensiblement tronc-pyramidale. La face 4, qui s'étend perpendi culairement au plan médian longitudinal perpendiculaire à la face supérieure 7 du barreau éloignée de l'extrémité avant 2 de celui-ci, comporte une partie centrale en retrait vers l'intérieur du nez en formant une cavité 5. Celle-ci est délimitée latéralement par des parois 6 sensiblement perpendiculaires à la surface supérieure 7 du barreau tandis que le fond de la cavité est formé par une paroi transversale perpendiculaire 8. La cavité 5 est délimitée vers le haut par une surface 9 sensiblement parallèle à la surface supérieure 7 du barreau.The ringing nose 3 has a substantially truncated pyramidal shape. The face 4, which extends perpendicularly to the longitudinal median plane perpendicular to the upper face 7 of the bar remote from the front end 2 thereof, has a central part recessed towards the inside of the nose, forming a cavity 5. The latter is delimited laterally by walls 6 substantially perpendicular to the upper surface 7 of the bar while the bottom of the cavity is formed by a perpendicular transverse wall 8. The cavity 5 is delimited upwards by a surface 9 substantially parallel to the upper surface 7 of the bar.

La cavité 5 est en communication avec l'intérieur creux du nez par l'intermédiaire de deux orifices 10 pratiqués chacun dans une des parois latérales 6. La cavité 5 communique également avec la partie supérieure de la grille par une ouverture 11 prévue dans la paroi délimitant la surface 4 de la cavité. La section transversale de l'ouverture 11 est plusieurs fois supérieure à la section transversale des orifices 10.The cavity 5 is in communication with the hollow interior of the nose by means of two orifices 10 each made in one of the side walls 6. The cavity 5 also communicates with the upper part of the grid by an opening 11 provided in the wall delimiting the surface 4 of the cavity. The cross section of the opening 11 is several times greater than the cross section of the orifices 10.

Dans le mode de réalisation des orifices 10, représenté à la figure 4 ceux-ci traversent la paroi 6 perpendiculairement au plan médian perpendiculaire à la surface supérieure 7 d'un barreau. Dans le mode de réalisation selon la figure 5, les axes des orifices 10 sont inclinés par rapport audit plan médian de façon à permettre l'usinage des orifices après la réalisation du barreau, contrairement au cas de la figure 4 pour lequel les orifices viennent de fonderie.In the embodiment of the orifices 10, shown in FIG. 4, these pass through the wall 6 perpendicular to the median plane perpendicular to the upper surface 7 of a bar. In the embodiment according to FIG. 5, the axes of the orifices 10 are inclined relative to said median plane so as to allow the machining of the orifices after the production of the bar, in contrast to the case of FIG. 4 for which the orifices come from foundry.

On constate que les passages 10 et l'orifice 11 permettent à l'air de combustion insufflé dans le nez à partir de la face inférieure du barreau de parvenir dans la couche de combustible se trouvant sur les barreaux.It can be seen that the passages 10 and the orifice 11 allow the combustion air blown into the nose from the underside of the bar to reach the fuel layer located on the bars.

Contrairement au barreau de l'art antérieur, où l'air sortait du barreau à une grande vitesse dans une direction bien déterminée, l'interposition de la cavité 5 dans la voie de l'air permet de répartir uniformément l'air à travers tous les barreaux, grâce aux orifices 10 dans lesquels la vitesse de l'air est importante, de disposer les orifices 10 à l'intérieur de la cavité 5, donc à l'abri des obstructions par les déchets ou les coulures de métal en fusion et en plus d'assurer une réduction de la vitesse de l'air et son introduction dans la couche d'une combustible sans entraînement de poussière.Unlike the bar of the prior art, where the air came out of the bar at a high speed in a well-defined direction, the interposition of the cavity 5 in the air path makes it possible to distribute the air uniformly throughout the bars, thanks to the orifices 10 in which the speed of the air is high, to place the orifices 10 inside the cavity 5, therefore protected from obstructions by waste or molten metal drips and in addition to ensuring a reduction in the speed of air and its introduction into the layer of a fuel without entrainment of dust.

Le barreau des grilles repésentées aux figures, à titre d'exemple, comporte deux orifices 10. Il est bien évident que le nombre d'orifices importe peu : il peut y en avoir un ou plusieurs, la section d'un orifice sera choisie en conséquence. Dans le cas de la figure 5, il est judicieux de disposer les trous de telle sorte que les jets d'air soient concourants afin de briser leur vitesse. Enfin chaque barreau conforme à la présente invention peu être muni d'un seul nez de ringardage comme représenté aux figures ou de plusieurs nez transversalement juxtaposés, dans le cas d'un barreau d'une plus grande largeur.The bar of the grids shown in the figures, for example, has two orifices 10. It is obvious that the number of orifices does not matter: there may be one or more, the section of an orifice will be chosen by result. In the case of FIG. 5, it is judicious to arrange the holes so that the air jets are concurrent in order to break their speed. Finally, each bar according to the present invention can be provided with a single ringing nose as shown in the figures or with several noses transversely juxtaposed, in the case of a bar of greater width.

Claims (7)

1. Fire- and incinerator-grate bar, particularly for a reciprocating grate, of the type including a substantially truncated-pyramidal shaped rabbling nose (3) and at least an opening (10) for distributing combustion air provided in the nose wall, characterized in that the rabbling nose (3) has in its wall (4), which is perpendicular to the longitudinal median plane of bar (1) and located to the side of the upstream end (2), a central part which stands back toward inside of the nose, which forms a cavity (5) opening in the direction of the bar axis, at least one lateral wall (6) delimiting the cavity (5) presents the air distributing opening (10) and the surface delimiting the cavity (5) downwardly presents an aperture (11), the transversal section of which is several times greater than the transversal section of the lateral opening (10).
2. Grate bar according to claim 1, characterized in that the lateral walls (6) of the cavity extend substantially vertically with respect to the top surface (7) of the bar, whereas the top surface (9) delimiting the cavity (5) is substantially parallel to this top surface (7).
3. Grate bar according to claim 1 or 2, characterized in that an air distributing opening (10) is provided in each of the parallel lateral walls (6) of the cavity (5).
4. Grate bar according to any preceding claims, characterized in that the distributing opening (10) passing through a wall (6) of the cavity of the rabbling nose (3) extends substantially perpendicularly to the median plane perpendicular to the top surface (7) of the bar.
` 5. Grate bar according to one of claims 1 to 4, characterized in that the axis of the distributing opening (10) provided in a wall (6) of the rabbling nose (3) is inclined with respect to the median plane perpendicular to the top surface (7) of the bar, so as to permit the machining of this opening (10) after the achievement of the bar.
6. Grate bar according to claim 5, characterized in that the distributing openings (10) are oriented so that the issuing air jets are intersecting so as to break up their rate.
7. Grate bar according to any preceding claims, characterized in that each bar may be provided with one or several noses transversally juxtaposed in the case of the bar of a greater width.
EP88401522A 1987-06-17 1988-06-17 Fire- or incinerator-bar, particularly for a reciprocating grate Expired - Lifetime EP0296949B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88401522T ATE58961T1 (en) 1987-06-17 1988-06-17 GRATE BAR FOR A COMBUSTION OR COMBUSTION GRATE, ESPECIALLY FOR A RECIPROCATING GRATE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8708472A FR2616885B1 (en) 1987-06-17 1987-06-17 COMBUSTION OR INCINERATION GRID BAR, ESPECIALLY A GRID WITH BACKUP MOVEMENT
FR8708472 1987-06-17

Publications (2)

Publication Number Publication Date
EP0296949A1 EP0296949A1 (en) 1988-12-28
EP0296949B1 true EP0296949B1 (en) 1990-12-05

Family

ID=9352160

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88401522A Expired - Lifetime EP0296949B1 (en) 1987-06-17 1988-06-17 Fire- or incinerator-bar, particularly for a reciprocating grate

Country Status (6)

Country Link
EP (1) EP0296949B1 (en)
AT (1) ATE58961T1 (en)
DE (1) DE3861218D1 (en)
ES (1) ES2019464B3 (en)
FR (1) FR2616885B1 (en)
GR (1) GR3001498T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105841171B (en) * 2016-04-07 2018-05-25 河南大学 Compound burning device and the boiler using the device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH463678A (en) * 1967-06-02 1968-10-15 Johannes Josef Martin Grate for large furnaces with air-cooled grate bars
DE3521266A1 (en) * 1985-06-13 1986-12-18 Walter Josef Dipl.-Ing. 8000 München Martin GRATE ROD FOR A FIRING GRATE OF A LARGE BURNER AND BURNING GRATE FOR THIS LARGE BURNER

Also Published As

Publication number Publication date
DE3861218D1 (en) 1991-01-17
EP0296949A1 (en) 1988-12-28
FR2616885B1 (en) 1989-09-22
FR2616885A1 (en) 1988-12-23
GR3001498T3 (en) 1992-10-08
ES2019464B3 (en) 1991-06-16
ATE58961T1 (en) 1990-12-15

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