EP3730838B1 - Bar for grate roller for incinerator furnace fireplace with improved air circulation, corresponding roller and grate - Google Patents

Bar for grate roller for incinerator furnace fireplace with improved air circulation, corresponding roller and grate Download PDF

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Publication number
EP3730838B1
EP3730838B1 EP20020189.5A EP20020189A EP3730838B1 EP 3730838 B1 EP3730838 B1 EP 3730838B1 EP 20020189 A EP20020189 A EP 20020189A EP 3730838 B1 EP3730838 B1 EP 3730838B1
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European Patent Office
Prior art keywords
plate
bar
roll
fin
fins
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EP20020189.5A
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German (de)
French (fr)
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EP3730838A1 (en
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André SIMPER
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Saretco
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Saretco
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H9/00—Revolving-grates; Rocking or shaking grates
    • F23H9/02—Revolving cylindrical grates
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H2700/00—Grates characterised by special features or applications
    • F23H2700/004—Rotary grates with horizontal axis

Definitions

  • the present invention relates to a bar for a grate roller for an incinerator furnace hearth, with improved air circulation.
  • the invention also relates to a roller provided with such a bar, and a grid provided with such a roller.
  • the invention finds application in particular to the incineration of standard waste, but also special waste such as solid recovered fuels (SRF).
  • SRF solid recovered fuels
  • the elements on which the combustible materials rest such as the bars of the rollers of an incinerator furnace hearth grate, are subjected to very severe thermal stresses, between heating due to thermal radiation and contact with burning materials, and cooling from the blowing of combustion air.
  • the bars of the rollers therefore constitute a lining formed from refractory castings mounted with play on a supporting framework.
  • the design of these bars, as a lining for rotating grate rollers, thus poses particular problems, insofar as this lining is subjected to thermal cycles with heating in the hearth, for nearly half a turn of the roller. , and cooling below the hearth for the remainder of the roller rotation.
  • the bars as packing elements, perform a rotation on themselves relative to the vertical, in the direction of gravity, at the same time as they are rotated by the roller. Also, their attachment to the frame of the roller must make it possible to maintain them in the three directions perpendicular, peripheral radial or tangential, and axial.
  • the frame of a roller has a cylindrical cage structure, with T-section steel side members arranged along generatrices of the roller at regular angular spacing, between two end plates.
  • the longitudinal web of these cross-sectional beams T is oriented in a plane passing through the axis of the roller, and directed towards this axis.
  • the packing elements are therefore bars in the form of ring segments, which each extend between two neighboring spars, and follow one another end to end on the periphery of the roller to form a ring in a plane perpendicular to the axis of the roller. roller. Furthermore, these rings follow one another juxtaposed from one flange to the other, and a gap is made between two adjacent rings for the blowing of combustion air, for example by means of bearing keys formed entirely in the bar and obtained during the manufacture by molding of this bar. On contact, the range keys of two axially adjacent bars therefore determine the minimum width of the gap.
  • the bars have a T-section, perpendicular to the periphery of the ring, with a longitudinal web forming a central rib directed towards the axis of the roller, in a plane perpendicular to this axis.
  • the wings or plate form the support surface for the fuel mass. Attachment of the bars is obtained by leaving notches at the two ends of the longitudinal web which engage around the wings or plate of the T-section side members as well.
  • these bars are inserted into the notch or notches provided for the manufacture on the side members, one after the other, parallel to the axis of the roller.
  • the first bars can be presented by forming an angle with respect to a plane perpendicular to the axis of the roller, between the side members, so that the longitudinal web of the corresponding bar, below the notches, passes between the wings. or plate of the side members, then this bar is brought back to its normal orientation.
  • a bar for a grid which is not intended for a roller grid, and which has fins arranged under the plate on each side of the longitudinal web, each fin extending on the one hand from the longitudinal web and on the other hand from the lower surface of the plate, promoting cooling by channeling the combustion air in the longitudinal direction of the bar, by means of notches formed in the fins which cooperate with the notches formed in the fins of the adjacent bar.
  • this type of bar apart from the fact that it is not suitable for mounting on the periphery of the frame of a roller due to its rectilinear shape, does not have sufficient cooling capacity for all types of waste. This is also the case for the known bars having an arcuate shape suitable for mounting on the frame of a roller.
  • these bars are well suited for mounting in grids intended for the incineration of solid waste, household waste or industrial residues which have an erratic structure, a high moisture content and a relatively low calorific value, because such grids cause a displacement, a deflection and an inversion of the combustible layers which descend the cascade of rollers, and lend themselves to a distributed blowing of combustion air at high flow rate, favorable to the drying of the waste upon entry into the incinerator and upon acceleration of combustion.
  • the object of the invention is in particular to provide a roller bar for an incinerator hearth grid, a corresponding roller and a grid, which is suitable for the treatment of special waste without premature wear of the bars or necessity.
  • Each fin extends from the longitudinal core so as to present a portion which protrudes from the plate, and each fin of the first group has an overall shape that is substantially identical and parallel to the overall shape of a determined fin of the second. group and is arranged offset with respect to this determined fin of the second group according to a given offset, so that, when the bar is arranged on a grate roller for an incinerator furnace hearth juxtaposed with a neighboring bar, the portion of each fin of the first group of the bar projecting from the plate defines, with the determined portion of the fin of the second group of the neighboring bar projecting from the plate of this neighboring bar, a calibrated air circulation channel.
  • a grid roller for an incinerator furnace hearth comprising at least two longitudinal members extending parallel to the axis of the roller according to two respective generatrices of the roller, and comprising at least a bar as presented above and the front and rear ends of which are placed respectively on the two side members.
  • the pipe system via the fins under the tray of the bar of the invention is formed of calibrated channels which increase the combustion air flow over the surface of the bar, therefore of the roller and the grid, and therefore promotes combustion, in particular of special waste, while amplifying the cooling of the bar.
  • the phenomenon of precipitated air obtained with the bar of the invention makes it possible to naturally clean the blowing intervals between the bars, and to create a sweeping effect, by lifting the fuel to the surface of the grate, thus maintain optimal and stable combustion over time.
  • the hearth grate for an incineration furnace of the invention comprises a series or cascade of rollers driven in rotation around their respective parallel horizontal axes, including at least one roller 2 according to the invention.
  • the roller 2 comprises a framework in the form of a cylindrical cage.
  • This frame comprises side members 12 mounted between two flanges, and oriented along generatrices of the roller 2, therefore parallel to the axis of the roller 2. These side members 12 are distributed over the periphery of the frame.
  • the roller 2 comprises at least two side members 12, and a plurality of bars, including at least one bar 1, 10, 11 according to the invention, the front and rear ends 4, 5 of the bar 1, 10, 11 being respectively placed on the two side members 12.
  • the bars are arranged perpendicular to the generatrices of the roller 2.
  • the roller 2 comprises several bars according to the invention, arranged end to end so as to form a ring on the surface of the roller 2.
  • the roller 2 comprises several bars 1, 10, 11 according to the invention, arranged two by two adjacent and extending perpendicularly to the generatrices of the roller 2.
  • intermediate rings 9 formed of ring segments, so that two segments of two respective intermediate rings 9 frame groups of at least two bars 1, 10, 11 arranged adjacent.
  • the bar 1 comprises a plate 3, a longitudinal web 6 and fins 7, 8.
  • the plate 3 has an arcuate shape in the longitudinal direction of the bar 1.
  • the upper surface of the plate 3 is intended to receive waste to be incinerated.
  • the plate 3 is extended and extends between two ends, respectively rear and front 4, 5.
  • the longitudinal core 6 is formed integrally with the plate 3. It is located under the latter, and extends on the one hand perpendicularly from the lower surface of the plate 3 to a lower edge, and on the other hand at least partially between the rear and front ends 4, 5 of the plate 3.
  • the fins 7, 8 are grouped together in a first group of fins 7 and a second group of fins 8. They are arranged under the plate 3 on either side of the longitudinal web 6. More precisely, the fins 7 of the first group of fins are arranged on a first side of the longitudinal web 6, and the fins 8 of the second group of fins (shown in dotted lines on the figure 3 ) are arranged on the other side of the longitudinal web 6.
  • These fins 7, 8 extend on the one hand from the longitudinal core 6, and on the other hand from the lower surface of the plate 3. They are formed integrally with the longitudinal core 6 and the plate 3.
  • the fins 7, 8 extend from the longitudinal core 6 perpendicularly thereto.
  • each fin 7, 8 extends from the longitudinal core 6 so as to present a portion which protrudes from the plate 3.
  • each fin 7 of the first group has an overall shape that is substantially identical and parallel to the overall shape of a determined fin 8 of the second group and is arranged in an offset manner with respect to this determined fin 8 of the second group.
  • This offset given between a fin 7 of the first group, and the corresponding offset fin 8 of the second group is calibrated and determines, once the bar 1 is mounted on a roller 2, the width of an air circulation channel 14. More precisely, when the bar 1 is arranged on a roller 2 of a grate for an incinerator furnace juxtaposed to a neighboring bar 10, 11, the portion of each fin 7 of the first group of the bar 1 protruding from the plate 3 defines, with the portion of the corresponding fin 8 of the second group from the neighboring bar 11 projecting from the plate of this neighboring bar 11, a channel 14 for the circulation of calibrated air.
  • each fin 8 of the second group of the bar 1 projecting from the plate 3 defines, with the portion of the corresponding fin 7 of the first group of the neighboring bar 10 projecting from the plate of this neighboring bar 11, a channel 14 calibrated air circulation.
  • the fins 7, 8 extend from the lower surface of the plate 3 to the lower end, or lower edge, of the longitudinal core 6.
  • the through hole 15 is formed in the longitudinal core 6. It is intended to receive a connecting rod making it possible to link several bars 1, 10, 11 together, as explained above.
  • two fins 7, on one side of the longitudinal core 6, and two fins 8 on the other side of the longitudinal core 6, extend from the lower surface of the plate 3 and stopping before the lower edge of the longitudinal core 6 and are distributed on either side of the through hole 15.
  • These fins 7, 8 extend from the lower surface of the plate 3 in a substantially direction perpendicular to the tangent to the arched upper surface of the plate 3 in the projection, on this upper surface of the plate 3, of the junction point of the corresponding fin 7, 8 with the lower surface of the plate 3.
  • the other fins 7, 8 extend from the lower surface of the plate 3 in a direction substantially inclined with respect to the tangent to the surface. arched upper of the plate 3 in the projection, on this upper surface of the plate 3, of the junction point of the corresponding fin with the lower surface of the plate 3.
  • each fin 7, 8 extends from the lower surface of the plate 3 in a main direction, and has an overall S shape centered on said main direction.
  • the fins 7, 8 of determined shape and position allow an optimization of the combustion. Thanks to the parallel offset between fins 7, 8 on either side of the longitudinal core 6, calibrated channels 14 are created. This makes it possible to increase the flow of combustion air over the surface of the bar 1, therefore of the roller 2, and therefore of the grid, and to amplify the cooling of the bar 1, therefore to increase its life.
  • the configuration with the fins 7, 8, positioned perpendicular to the side faces of the longitudinal web 6 of the bar 1, makes it possible to limit the penetration of fines and metal castings (aluminum), into the structure of the roller 1, avoiding thus the jams inside the roller 2, which could cause its deformation.
  • the invention is not limited to the example illustrated in the figures in which the fins have an S-shape, nor to a determined number of fins per bar.

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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)

Description

La présente invention concerne un barreau pour rouleau de grille pour foyer de four d'incinérateur, à circulation d'air améliorée. L'invention concerne également un rouleau pourvu d'un tel barreau, et une grille pourvue d'un tel rouleau. L'invention trouve notamment une application à l'incinération des déchets standard, mais aussi spéciaux tels que les combustibles solides de récupération (CSR).The present invention relates to a bar for a grate roller for an incinerator furnace hearth, with improved air circulation. The invention also relates to a roller provided with such a bar, and a grid provided with such a roller. The invention finds application in particular to the incineration of standard waste, but also special waste such as solid recovered fuels (SRF).

Dans le foyer d'un four d'incinérateur, les éléments sur lesquels reposent les matières combustibles, tels que les barreaux des rouleaux d'une grille de foyer de four d'incinérateur, sont soumis à des contraintes thermiques très sévères, entre les échauffements dus au rayonnement thermique et au contact des matières en combustion, et le refroidissement provenant du soufflage d'air comburant.In the hearth of an incinerator furnace, the elements on which the combustible materials rest, such as the bars of the rollers of an incinerator furnace hearth grate, are subjected to very severe thermal stresses, between heating due to thermal radiation and contact with burning materials, and cooling from the blowing of combustion air.

Les barreaux des rouleaux constituent donc un garnissage formé de pièces de fonderie réfractaires montées avec jeu sur une ossature porteuse. La conception de ces barreaux, en tant que garnissage de rouleaux de grille rotatifs, pose ainsi des problèmes particuliers, dans la mesure ou ce garnissage est soumis à des cycles thermiques avec échauffement dans le foyer, pendant près d'un demi-tour de rouleau, et refroidissement en dessous du foyer pendant le reste de la rotation du rouleau.The bars of the rollers therefore constitute a lining formed from refractory castings mounted with play on a supporting framework. The design of these bars, as a lining for rotating grate rollers, thus poses particular problems, insofar as this lining is subjected to thermal cycles with heating in the hearth, for nearly half a turn of the roller. , and cooling below the hearth for the remainder of the roller rotation.

Par ailleurs, les barreaux, en tant qu'éléments de garnissage, exécutent une rotation sur eux-mêmes par rapport à la verticale, direction de la pesanteur, en même temps qu'ils sont entraînés en rotation par le rouleau. Aussi, leur fixation sur l'ossature du rouleau doit permettre de les maintenir dans les trois direction perpendiculaire, radiale périphérique ou tangentielle, et axiale.Furthermore, the bars, as packing elements, perform a rotation on themselves relative to the vertical, in the direction of gravity, at the same time as they are rotated by the roller. Also, their attachment to the frame of the roller must make it possible to maintain them in the three directions perpendicular, peripheral radial or tangential, and axial.

De manière classique, l'ossature d'un rouleau présente une structure en cage cylindrique, avec des longerons en acier à section en T disposés suivant des génératrices du rouleau à espacement angulaire régulier, entre deux flasques d'extrémité. L'âme longitudinale de ces longerons à section en T est orientée dans un plan passant par l'axe du rouleau, et dirigée vers cet axe.Conventionally, the frame of a roller has a cylindrical cage structure, with T-section steel side members arranged along generatrices of the roller at regular angular spacing, between two end plates. The longitudinal web of these cross-sectional beams T is oriented in a plane passing through the axis of the roller, and directed towards this axis.

Les éléments de garnissage sont donc des barreaux en forme de segments d'anneaux, qui s'étendent chacun entre deux longerons voisins, et se succèdent bout à bout sur la périphérie du rouleau pour former un anneau dans un plan perpendiculaire à l'axe du rouleau. Par ailleurs, ces anneaux se succèdent juxtaposés d'un flasque à l'autre, et un intervalle est ménagé entre deux anneaux adjacents pour le soufflage d'air comburant, par exemple par l'intermédiaire de touches de portée formées intégralement dans le barreau et obtenue lors de la fabrication par moulage de ce barreau. Au contact, les touches de portée de deux barreaux adjacents axialement déterminent donc le minimum de largeur de l'intervalle.The packing elements are therefore bars in the form of ring segments, which each extend between two neighboring spars, and follow one another end to end on the periphery of the roller to form a ring in a plane perpendicular to the axis of the roller. roller. Furthermore, these rings follow one another juxtaposed from one flange to the other, and a gap is made between two adjacent rings for the blowing of combustion air, for example by means of bearing keys formed entirely in the bar and obtained during the manufacture by molding of this bar. On contact, the range keys of two axially adjacent bars therefore determine the minimum width of the gap.

Les barreaux présentent une section en T, perpendiculairement à la périphérie de l'anneau, avec une âme longitudinale formant une nervure centrale dirigée vers l'axe du rouleau, dans un plan perpendiculaire à cet axe. Les ailes ou plateau forment la surface de support pour la masse combustible. L'accrochage des barreaux est obtenu en ménageant aux deux extrémités de l'âme longitudinale des encoches qui s'engagent autour des ailes ou plateau des longerons à section en T également.The bars have a T-section, perpendicular to the periphery of the ring, with a longitudinal web forming a central rib directed towards the axis of the roller, in a plane perpendicular to this axis. The wings or plate form the support surface for the fuel mass. Attachment of the bars is obtained by leaving notches at the two ends of the longitudinal web which engage around the wings or plate of the T-section side members as well.

Pour la mise en place de ces barreaux, on les insère dans la ou les encoches prévues à la fabrication sur les longerons, les uns après les autres, parallèlement à l'axe du rouleau. On notera toutefois que les premiers barreaux peuvent être présentés en formant un angle par rapport à un plan perpendiculaire à l'axe du rouleau, entre les longerons, afin que l'âme longitudinale du barreau correspondant, en dessous des encoches, passe entre les ailes ou plateau des longerons, puis on ramène ce barreau dans on orientation normale.For the installation of these bars, they are inserted into the notch or notches provided for the manufacture on the side members, one after the other, parallel to the axis of the roller. Note, however, that the first bars can be presented by forming an angle with respect to a plane perpendicular to the axis of the roller, between the side members, so that the longitudinal web of the corresponding bar, below the notches, passes between the wings. or plate of the side members, then this bar is brought back to its normal orientation.

La nécessité de prévoir des jeux de dilatation différentielle entre un barreau et l'ossature, l'usure éventuelle des touches de portées, et le coincement des débris provenant de la masse combustible entre les barreaux, peuvent entraîner des variations substantielles de largeur réelle des intervalles entre barreaux, sur l'étendue axiale du rouleau. Ceci est d'autant plus vrai si cette étendue est importante. Cela entraîne une perturbation dans la masse combustible.The need to provide differential expansion clearances between a bar and the framework, the possible wear of the span keys, and the jamming of debris from the combustible mass between the bars, can cause substantial variations in the actual width of the intervals. between bars, over the axial extent of the roller. this is all the more true if this extent is important. This leads to a disturbance in the combustible mass.

Cet inconvénient peut être atténué, tout en facilitant le démontage du rouleau, en répartissant les anneaux en une pluralité de groupes, séparés par des anneaux intercalaires formés de pièces en segment d'anneau, avec une première extrémité fixée, par exemple par boulonnage, sur un longeron, et une deuxième extrémité reposant sur le longeron immédiatement en arrière. Cette seconde extrémité est liée avec la première extrémité de la pièce intercalaire contigüe en arrière, par une liaison par exemple de type tenon (dans la deuxième extrémité de l'un) - mortaise (dans la première extrémité de l'autre).This drawback can be mitigated, while facilitating the dismantling of the roller, by dividing the rings into a plurality of groups, separated by intermediate rings formed of ring segment pieces, with a first end fixed, for example by bolting, on a spar, and a second end resting on the spar immediately aft. This second end is linked with the first end of the adjoining intermediate piece at the rear, by a connection, for example of the tenon type (in the second end of one) - mortise (in the first end of the other).

On comprend ainsi que, en place, ces pièces intercalaires limitent le jeu axial du groupe d'anneaux auquel elles sont associées par voisinage, et que, retirées, elles autorisent une mise en biais des barreaux, suffisante pour permettre le démontage sans requérir de glisser les barreaux jusqu'à l'encoche prévue sur les longerons et normalement destinée au montage.It will thus be understood that, in place, these spacers limit the axial play of the group of rings with which they are associated by proximity, and that, removed, they allow a biasing of the bars, sufficient to allow disassembly without requiring sliding. the bars up to the notch provided on the side members and normally intended for assembly.

On connait par ailleurs, du document FR 2 885 404 , un barreau pour grille qui n'est pas destiné à une grille à rouleaux, et qui présente des ailettes disposées sous le plateau de chaque côté de l'âme longitudinale, chaque ailette s'étendant d'une part depuis l'âme longitudinale et d'autre part depuis la surface inférieure du plateau, favorisant le refroidissement par canalisation de l'air comburant dans la direction longitudinale du barreau, au moyen d'encoches formées dans les ailettes qui coopèrent avec les encoches formées dans les ailettes du barreau adjacent.We also know from the document FR 2 885 404 , a bar for a grid which is not intended for a roller grid, and which has fins arranged under the plate on each side of the longitudinal web, each fin extending on the one hand from the longitudinal web and on the other hand from the lower surface of the plate, promoting cooling by channeling the combustion air in the longitudinal direction of the bar, by means of notches formed in the fins which cooperate with the notches formed in the fins of the adjacent bar.

Cependant, ce type de barreau, outre le fait qu'il n'est pas adapté au montage sur la périphérie de l'ossature d'un rouleau de par sa forme rectiligne, ne présente pas de capacité de refroidissement suffisante pour tous les types de déchets. C'est le cas également pour les barreaux connus présentant une forme arquée adaptée au montage sur l'ossature d'un rouleau.However, this type of bar, apart from the fact that it is not suitable for mounting on the periphery of the frame of a roller due to its rectilinear shape, does not have sufficient cooling capacity for all types of waste. This is also the case for the known bars having an arcuate shape suitable for mounting on the frame of a roller.

En particulier, ces barreaux sont bien adaptés au montage dans des grilles destinées à l'incinération de déchets solides, ordures ménagères ou résidus industriels qui présentent une structure erratique, une teneur en humidité importante et un pouvoir calorifique relativement faible, car de telles grilles provoquent un déplacement, un détassement et un retournement des couches combustibles qui descendent la cascade de rouleaux, et se prêtent à un soufflage réparti d'air comburant à débit élevé, propice au séchage des déchets à l'entrée dans l'incinérateur et à l'accélération de la combustion.In particular, these bars are well suited for mounting in grids intended for the incineration of solid waste, household waste or industrial residues which have an erratic structure, a high moisture content and a relatively low calorific value, because such grids cause a displacement, a deflection and an inversion of the combustible layers which descend the cascade of rollers, and lend themselves to a distributed blowing of combustion air at high flow rate, favorable to the drying of the waste upon entry into the incinerator and upon acceleration of combustion.

Le document US 5 081 939 montre un barreau pour rouleau de grille selon le préambule de la revendication 1.The document US 5,081,939 shows a grid roll bar according to the preamble of claim 1.

Cependant, lorsqu'il est question du traitement de déchets spéciaux, à structure homogène, à faible teneur en humidité, et à fort pouvoir calorifique, tels que les combustibles solides de récupération ou CSR, les barreaux de type connus ne sont pas satisfaisants en termes de refroidissement et de circulation d'air comburant, ce qui entraîne une durée de vie réduite pour ces barreaux soumis à des contraintes thermiques élevées. Ceci entraîne une usure rapide des barreaux, et un nombre et un temps d'interventions de maintenance accru, ce qui a des conséquences financières importantes pour l'exploitant de l'incinérateur.However, when it comes to the treatment of special waste, with a homogeneous structure, low moisture content, and high calorific value, such as solid recovered fuels or SRF, the bars of known type are not satisfactory in terms of cooling and combustion air circulation, resulting in a reduced service life for these bars subjected to high thermal stresses. This causes rapid wear of the bars, and an increased number and time of maintenance interventions, which has significant financial consequences for the operator of the incinerator.

Un des buts de l'invention est donc de résoudre notamment les problèmes précités. Ainsi, l'invention a notamment pour objectif de propose un barreau de rouleau pour grille de foyer d'incinérateur, un rouleau et une grille correspondants, qui soit adapté au traitement des déchets spéciaux sans usure prématurée des barreaux ni nécessité.One of the aims of the invention is therefore to solve in particular the aforementioned problems. Thus, the object of the invention is in particular to provide a roller bar for an incinerator hearth grid, a corresponding roller and a grid, which is suitable for the treatment of special waste without premature wear of the bars or necessity.

L'invention a ainsi pour objet, selon un premier aspect, un barreau pour rouleau de grille pour foyer de four d'incinérateur, comprenant :

  • un plateau de forme arquée dans la direction longitudinale du barreau et dont la surface supérieure est destinée à recevoir des déchets à incinérer, ledit plateau se prolongeant en deux extrémités respectivement arrière et avant,
  • une âme longitudinale formée intégralement avec le plateau, située sous ce plateau et s'étendant d'une part perpendiculairement depuis la surface inférieure du plateau jusqu'à un bord inférieur, et d'autre part au moins partiellement entre les extrémités arrière et avant du plateau,
  • un premier et un deuxième groupes de plusieurs ailettes, disposés sous le plateau respectivement de chaque côté de l'âme longitudinale, chaque ailette s'étendant d'une part depuis l'âme longitudinale et d'autre part depuis la surface inférieure du plateau.
A subject of the invention is thus, according to a first aspect, a bar for a grid roller for an incinerator furnace hearth, comprising:
  • a tray of arcuate shape in the longitudinal direction of the bar and the upper surface of which is intended to receive waste to be incinerated, said tray extending at two ends, respectively rear and front,
  • a longitudinal core formed integrally with the plate, located under this plate and extending on the one hand perpendicularly from the lower surface of the tray up to a lower edge, and on the other hand at least partially between the rear and front ends of the tray,
  • a first and a second group of several fins, arranged under the plate respectively on each side of the longitudinal core, each fin extending on the one hand from the longitudinal core and on the other hand from the lower surface of the plate.

Chaque ailette s'étend depuis l'âme longitudinale en sorte de présenter une portion qui dépasse du plateau, et chaque ailette du premier groupe présente une forme d'ensemble sensiblement identique et parallèle à la forme d'ensemble d'une ailette déterminée du deuxième groupe et est disposée de manière décalée par rapport à cette ailette déterminée du deuxième groupe selon un décalage donné, de sorte que, lorsque le barreau est disposé sur un rouleau de grille pour foyer de four d'incinérateur juxtaposé à un barreau voisin, la portion de chaque ailette du premier groupe du barreau dépassant du plateau définit, avec la portion de l'ailette déterminée du deuxième groupe du barreau voisin dépassant du plateau de ce barreau voisin, un canal de circulation d'air calibré.Each fin extends from the longitudinal core so as to present a portion which protrudes from the plate, and each fin of the first group has an overall shape that is substantially identical and parallel to the overall shape of a determined fin of the second. group and is arranged offset with respect to this determined fin of the second group according to a given offset, so that, when the bar is arranged on a grate roller for an incinerator furnace hearth juxtaposed with a neighboring bar, the portion of each fin of the first group of the bar projecting from the plate defines, with the determined portion of the fin of the second group of the neighboring bar projecting from the plate of this neighboring bar, a calibrated air circulation channel.

Suivant certains mode de réalisation, le barreau comprend en outre une ou plusieurs des caractéristiques suivantes, prise(s) isolément ou suivant toutes les combinaisons techniquement possibles :

  • au moins une partie des ailettes s'étendent depuis la surface inférieure du plateau jusqu'au bord inférieur de l'âme longitudinale ;
  • au moins une partie des ailettes s'étendent depuis la surface inférieure du plateau et s'arrêtent avant le bord inférieur de l'âme longitudinale ;
  • l'âme longitudinale comprend un trou traversant destiné à recevoir une tige de liaison permettant de lier plusieurs barreaux entre eux, et chacun des premier et deuxième groupes d'ailettes comprend au moins deux ailettes s'étendant depuis la surface inférieure du plateau et s'arrêtant avant le bord inférieur de l'âme longitudinale et réparties de part et d'autre du trou traversant ;
  • chacune des au moins deux ailettes s'étend depuis la surface inférieure du plateau dans une direction sensiblement perpendiculaire à la tangente à la surface supérieure arquée du plateau en la projection du point de jonction de l'ailette correspondante avec la surface inférieure du plateau sur cette surface supérieure du plateau ;
  • chaque ailette d'au moins une partie des ailettes s'étend depuis la surface inférieure du plateau dans une direction sensiblement inclinée par rapport à la tangente à la surface supérieure arquée du plateau en la projection du point de jonction de l'ailette correspondante avec la surface inférieure du plateau sur cette surface supérieure du plateau.
According to certain embodiments, the bar further comprises one or more of the following characteristics, taken in isolation or in any technically possible combination:
  • at least part of the fins extend from the lower surface of the plate to the lower edge of the longitudinal web;
  • at least part of the fins extend from the lower surface of the plate and stop before the lower edge of the longitudinal web;
  • the longitudinal core comprises a through hole intended to receive a connecting rod making it possible to link several bars together, and each of the first and second groups of fins comprises at least two fins extending from the lower surface of the plate and s' stopping before the lower edge of the longitudinal web and distributed on either side of the through hole;
  • each of the at least two fins extends from the lower surface of the tray in a direction substantially perpendicular to the tangent to the arched upper surface of the tray, projecting the junction point of the corresponding fin with the lower surface of the tray thereon. top surface of the tray;
  • each fin of at least a portion of the fins extends from the lower surface of the tray in a direction substantially inclined with respect to the tangent to the upper arcuate surface of the tray in the projection of the junction point of the corresponding fin with the lower surface of the tray on this upper surface of the tray.

L'invention a également pour objet, selon un deuxième aspect, un rouleau de grille pour foyer de four d'incinérateur comprenant au moins deux longerons s'étendant parallèlement à l'axe du rouleau selon deux génératrices respectives du rouleau, et comprenant au moins un barreau tel que présenté ci-dessus et dont les extrémités avant et arrière sont posées respectivement sur les deux longerons.Another subject of the invention, according to a second aspect, is a grid roller for an incinerator furnace hearth comprising at least two longitudinal members extending parallel to the axis of the roller according to two respective generatrices of the roller, and comprising at least a bar as presented above and the front and rear ends of which are placed respectively on the two side members.

Suivant certains modes de réalisation, le rouleau comprend en outre une ou plusieurs des caractéristiques suivantes, prise(s) isolément ou suivant toutes les combinaisons techniquement possibles :

  • le barreau est disposé perpendiculairement aux génératrices du rouleau ;
  • le rouleau comprend plusieurs barreaux tels que présentés ci-dessus, et disposés bout à bout en sorte de former un anneau à la surface du rouleau ;
  • le rouleau comprend plusieurs barreaux tels que présentés ci-dessus, et disposés deux à deux de manière adjacente et s'étendant perpendiculairement aux génératrices du rouleau ;
  • au moins deux barreaux disposés de manière adjacente et s'étendant perpendiculairement aux génératrices du rouleau sont liés entre eux au moyen d'une tige de liaison traversant les trous traversants de chacun des au moins deux barreaux ;
  • au moins deux barreaux disposés de manière adjacente forment un groupe de barreaux encadré de part et d'autre par deux segments de deux anneaux intercalaires.
According to certain embodiments, the roller further comprises one or more of the following characteristics, taken in isolation or in any technically possible combination:
  • the bar is arranged perpendicular to the generatrices of the roller;
  • the roll comprises several bars as presented above, and arranged end to end so as to form a ring on the surface of the roll;
  • the roll comprises several bars as presented above, and arranged in pairs adjacent to and extending perpendicular to the generatrices of the roll;
  • at least two bars arranged adjacent and extending perpendicular to the generatrices of the roller are linked together by means of a connecting rod passing through the through holes of each of the at least two bars;
  • at least two bars arranged adjacent form a group of bars framed on either side by two segments of two intermediate rings.

Ainsi, le système de canalisation par l'intermédiaire des ailettes sous le plateau du barreau de l'invention, est formé de canaux calibrés qui augmentent le débit d'air comburant sur la surface du barreau, donc du rouleau et de la grille, et favorise donc la combustion notamment des déchets spéciaux, tout en amplifiant le refroidissement du barreau.Thus, the pipe system via the fins under the tray of the bar of the invention, is formed of calibrated channels which increase the combustion air flow over the surface of the bar, therefore of the roller and the grid, and therefore promotes combustion, in particular of special waste, while amplifying the cooling of the bar.

Ceci permet d'augmenter la durée de vie du barreau, donc de réduire les interventions de maintenance, et le coût correspondant.This makes it possible to increase the life of the bar, and therefore to reduce maintenance interventions, and the corresponding cost.

En outre, le phénomène d'air précipité obtenu avec le barreau de l'invention permet de nettoyer naturellement les intervalles de soufflage entre les barreaux, et de créer un effet de ramonage, en soulevant le combustible à la surface de la grille, pour ainsi maintenir une combustion optimale et stable dans le temps.In addition, the phenomenon of precipitated air obtained with the bar of the invention makes it possible to naturally clean the blowing intervals between the bars, and to create a sweeping effect, by lifting the fuel to the surface of the grate, thus maintain optimal and stable combustion over time.

Les caractéristiques et avantages de l'invention apparaîtront à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple, et non limitative, en référence aux figures annexées suivantes :

  • [Fig. 1] représentation schématique d'un exemple de rouleau selon l'invention, comprenant une série de barreaux selon l'invention ;
  • [Fig.2] représentation schématique d'un exemple de rouleau selon l'invention, vue en coupe selon un plan perpendiculaire à l'axe du rouleau ;
  • [Fig.3] représentation schématique d'un exemple de barreau selon l'invention ;
  • [Fig.4] représentation schématique de la juxtaposition de 3 barreaux tels que celui de la figure 3, vus par le dessous.
The characteristics and advantages of the invention will become apparent on reading the description which follows, given solely by way of example, and not limiting, with reference to the following appended figures:
  • [ Fig. 1 ] schematic representation of an example of a roller according to the invention, comprising a series of bars according to the invention;
  • [ Fig. 2 ] schematic representation of an exemplary roll according to the invention, sectional view along a plane perpendicular to the axis of the roll;
  • [ Fig. 3 ] schematic representation of an example of a bar according to the invention;
  • [ Fig. 4 ] schematic representation of the juxtaposition of 3 bars such as that of the figure 3 , seen from below.

Tel que représenté dans un exemple, notamment en référence aux figures 1 et 2, la grille de foyer pour four d'incinération de l'invention comprend une série ou cascade de rouleaux entraînés en rotation autour de leurs axes respectifs horizontaux parallèles, dont au moins un rouleau 2 selon l'invention.As shown in one example, in particular with reference to figures 1 and 2 , the hearth grate for an incineration furnace of the invention comprises a series or cascade of rollers driven in rotation around their respective parallel horizontal axes, including at least one roller 2 according to the invention.

Le rouleau 2 selon l'invention comprend une ossature en forme de cage cylindrique. Cette ossature comprend des longerons 12 montés entre deux flasques, et orientés selon des génératrices du rouleau 2, donc parallèlement à l'axe du rouleau 2. Ces longerons 12 sont répartis sur la périphérie de l'ossature.The roller 2 according to the invention comprises a framework in the form of a cylindrical cage. This frame comprises side members 12 mounted between two flanges, and oriented along generatrices of the roller 2, therefore parallel to the axis of the roller 2. These side members 12 are distributed over the periphery of the frame.

Plus précisément, le rouleau 2 comprend au moins deux longerons 12, et une pluralité de barreaux, dont au moins un barreau 1, 10, 11 selon l'invention, les extrémités avant et arrière 4, 5 du barreau 1, 10, 11 étant posées respectivement sur les deux longerons 12.More precisely, the roller 2 comprises at least two side members 12, and a plurality of bars, including at least one bar 1, 10, 11 according to the invention, the front and rear ends 4, 5 of the bar 1, 10, 11 being respectively placed on the two side members 12.

De préférence, les barreaux sont disposés perpendiculairement aux génératrices du rouleau 2.Preferably, the bars are arranged perpendicular to the generatrices of the roller 2.

De préférence également, le rouleau 2 comprend plusieurs barreaux selon l'invention, disposés bout à bout en sorte de former un anneau à la surface du rouleau 2.Also preferably, the roller 2 comprises several bars according to the invention, arranged end to end so as to form a ring on the surface of the roller 2.

De préférence encore, le rouleau 2 comprend plusieurs barreaux 1, 10, 11 selon l'invention, disposés deux à deux de manière adjacente et s'étendant perpendiculairement aux génératrices du rouleau 2.More preferably, the roller 2 comprises several bars 1, 10, 11 according to the invention, arranged two by two adjacent and extending perpendicularly to the generatrices of the roller 2.

On peut prévoir de lier les barreaux adjacents 1, 10, 11 deux à deux au moyen d'une tige de liaison traversant des trous traversants 15 dans chacun des barreaux 1, 10, 11.It is possible to provide for connecting the adjacent bars 1, 10, 11 in pairs by means of a connecting rod passing through through holes 15 in each of the bars 1, 10, 11.

On peut disposer des anneaux intercalaires 9, formés de segments d'anneaux, de sortes que deux segments de deux anneaux intercalaires 9 respectifs encadrent des groupes d'au moins deux barreaux 1, 10, 11 disposés de manière adjacente.It is possible to have intermediate rings 9, formed of ring segments, so that two segments of two respective intermediate rings 9 frame groups of at least two bars 1, 10, 11 arranged adjacent.

Comme on peut le voir plus précisément sur les figures 3 et 4, le barreau 1 selon l'invention comprend un plateau 3, une âme longitudinale 6 et des ailettes 7, 8.As can be seen more precisely on the figures 3 and 4 , the bar 1 according to the invention comprises a plate 3, a longitudinal web 6 and fins 7, 8.

Le plateau 3 présente une forme arquée dans la direction longitudinale du barreau 1. La surface supérieure du plateau 3 est destinée à recevoir des déchets à incinérer. Le plateau 3 se prolonge et s'étend entre deux extrémités respectivement arrière et avant 4, 5.The plate 3 has an arcuate shape in the longitudinal direction of the bar 1. The upper surface of the plate 3 is intended to receive waste to be incinerated. The plate 3 is extended and extends between two ends, respectively rear and front 4, 5.

L'âme longitudinale 6 est formée intégralement avec le plateau 3. Elle est située sous ce dernier, et s'étend d'une part perpendiculairement depuis la surface inférieure du plateau 3 jusqu'à un bord inférieur, et d'autre part au moins partiellement entre les extrémités arrière et avant 4, 5 du plateau 3.The longitudinal core 6 is formed integrally with the plate 3. It is located under the latter, and extends on the one hand perpendicularly from the lower surface of the plate 3 to a lower edge, and on the other hand at least partially between the rear and front ends 4, 5 of the plate 3.

Les ailettes 7, 8 sont regroupées en un premier groupe d'ailettes 7 et un deuxième groupe d'ailettes 8. Elles sont disposées sous le plateau 3 de part et d'autre de l'âme longitudinale 6. Plus précisément, les ailettes 7 du premier groupe d'ailettes sont disposées d'un premier côté de l'âme longitudinale 6, et les ailettes 8 du deuxième groupe d'ailettes (matérialisées en traits pointillés sur la figure 3) sont disposées de l'autre côté de l'âme longitudinale 6.The fins 7, 8 are grouped together in a first group of fins 7 and a second group of fins 8. They are arranged under the plate 3 on either side of the longitudinal web 6. More precisely, the fins 7 of the first group of fins are arranged on a first side of the longitudinal web 6, and the fins 8 of the second group of fins (shown in dotted lines on the figure 3 ) are arranged on the other side of the longitudinal web 6.

Ces ailettes 7, 8 s'étendent d'une part depuis l'âme longitudinale 6, et d'autre part depuis la surface inférieure du plateau 3. Elles sont formées intégralement avec l'âme longitudinale 6 et le plateau 3.These fins 7, 8 extend on the one hand from the longitudinal core 6, and on the other hand from the lower surface of the plate 3. They are formed integrally with the longitudinal core 6 and the plate 3.

De préférence, les ailettes 7, 8 s'étendent depuis l'âme longitudinale 6 perpendiculairement à celle-ci.Preferably, the fins 7, 8 extend from the longitudinal core 6 perpendicularly thereto.

Comme on peut le voir plus précisément sur la figure 4, chaque ailette 7, 8 s'étend depuis l'âme longitudinale 6 en sorte de présenter une portion qui dépasse du plateau 3.As can be seen more precisely on the figure 4 , each fin 7, 8 extends from the longitudinal core 6 so as to present a portion which protrudes from the plate 3.

Par ailleurs, chaque ailette 7 du premier groupe présente une forme d'ensemble sensiblement identique et parallèle à la forme d'ensemble d'une ailette 8 déterminée du deuxième groupe et est disposée de manière décalée par rapport à cette ailette 8 déterminée du deuxième groupe.Furthermore, each fin 7 of the first group has an overall shape that is substantially identical and parallel to the overall shape of a determined fin 8 of the second group and is arranged in an offset manner with respect to this determined fin 8 of the second group. .

Ce décalage donné entre une ailette 7 du premier groupe, et l'ailette décalée 8 correspondante du deuxième groupe est calibré et détermine, une fois le barreau 1 monté sur un rouleau 2 la largeur d'un canal 14 de circulation d'air. Plus précisément, lorsque le barreau 1 est disposé sur un rouleau 2 de grille pour foyer de four d'incinérateur juxtaposé à un barreau voisin 10, 11, la portion de chaque ailette 7 du premier groupe du barreau 1 dépassant du plateau 3 définit, avec la portion de l'ailette 8 correspondante du deuxième groupe du barreau voisin 11 dépassant du plateau de ce barreau voisin 11, un canal 14 de circulation d'air calibré. De la même manière, la portion de chaque ailette 8 du deuxième groupe du barreau 1 dépassant du plateau 3 définit, avec la portion de l'ailette 7 correspondante du premier groupe du barreau voisin 10 dépassant du plateau de ce barreau voisin 11, un canal 14 de circulation d'air calibré.This offset given between a fin 7 of the first group, and the corresponding offset fin 8 of the second group is calibrated and determines, once the bar 1 is mounted on a roller 2, the width of an air circulation channel 14. More precisely, when the bar 1 is arranged on a roller 2 of a grate for an incinerator furnace juxtaposed to a neighboring bar 10, 11, the portion of each fin 7 of the first group of the bar 1 protruding from the plate 3 defines, with the portion of the corresponding fin 8 of the second group from the neighboring bar 11 projecting from the plate of this neighboring bar 11, a channel 14 for the circulation of calibrated air. Likewise, the portion of each fin 8 of the second group of the bar 1 projecting from the plate 3 defines, with the portion of the corresponding fin 7 of the first group of the neighboring bar 10 projecting from the plate of this neighboring bar 11, a channel 14 calibrated air circulation.

De préférence, les ailettes 7, 8 s'étendent depuis la surface inférieure du plateau 3 jusqu'à l'extrémité inférieure, ou bord inférieur, de l'âme longitudinale 6.Preferably, the fins 7, 8 extend from the lower surface of the plate 3 to the lower end, or lower edge, of the longitudinal core 6.

Certaines des ailettes 7, 8, notamment celles à proximité de la partie médiane, et du trou traversant 15, du barreau 1, s'arrêtent avant le bord inférieur de l'âme longitudinale 6.Some of the fins 7, 8, in particular those near the middle part, and the through hole 15, of the bar 1, stop before the lower edge of the longitudinal web 6.

Le trou traversant 15 est formé dans l'âme longitudinale 6. Il est destiné à recevoir une tige de liaison permettant de lier plusieurs barreaux 1, 10, 11 entre eux, tel qu'expliqué plus haut.The through hole 15 is formed in the longitudinal core 6. It is intended to receive a connecting rod making it possible to link several bars 1, 10, 11 together, as explained above.

Dans le mode de réalisation particulier représenté sur les figures, deux ailettes 7, d'un premier côté de l'âme longitudinale 6, et deux ailettes 8 de l'autre côté de l'âme longitudinale 6, s'étendent depuis la surface inférieure du plateau 3 et s'arrêtant avant le bord inférieur de l'âme longitudinale 6 et sont réparties de part et d'autre du trou traversant 15. Ces ailettes 7, 8 s'étendent depuis la surface inférieure du plateau 3 dans une direction sensiblement perpendiculaire à la tangente à la surface supérieure arquée du plateau 3 en la projection, sur cette surface supérieure du plateau 3, du point de jonction de l'ailette 7, 8 correspondante avec la surface inférieure du plateau 3.In the particular embodiment shown in the figures, two fins 7, on one side of the longitudinal core 6, and two fins 8 on the other side of the longitudinal core 6, extend from the lower surface of the plate 3 and stopping before the lower edge of the longitudinal core 6 and are distributed on either side of the through hole 15. These fins 7, 8 extend from the lower surface of the plate 3 in a substantially direction perpendicular to the tangent to the arched upper surface of the plate 3 in the projection, on this upper surface of the plate 3, of the junction point of the corresponding fin 7, 8 with the lower surface of the plate 3.

Dans ce mode de réalisation particuliers représenté sur les figures, les autres ailettes 7, 8 s'étendent depuis la surface inférieure du plateau 3 dans une direction sensiblement inclinée par rapport à la tangente à la surface supérieure arquée du plateau 3 en la projection, sur cette surface supérieure du plateau 3, du point de jonction de l'ailette correspondante avec la surface inférieure du plateau 3.In this particular embodiment shown in the figures, the other fins 7, 8 extend from the lower surface of the plate 3 in a direction substantially inclined with respect to the tangent to the surface. arched upper of the plate 3 in the projection, on this upper surface of the plate 3, of the junction point of the corresponding fin with the lower surface of the plate 3.

De préférence, comme représenté sur les figures, chaque ailette 7, 8 s'étend depuis la surface inférieure du plateau 3 dans une direction principale, et présente une forme d'ensemble en S centrée sur ladite direction principale.Preferably, as shown in the figures, each fin 7, 8 extends from the lower surface of the plate 3 in a main direction, and has an overall S shape centered on said main direction.

Ainsi, les ailettes 7, 8 de forme et de position déterminées permettent une optimisation de la combustion. Grâce au décalage parallèle entre ailettes 7, 8 de part et d'autre de l'âme longitudinale 6, des canaux 14 calibrés sont créés. Cela permet d'augmenter le débit d'air comburant sur la surface du barreau 1, donc du rouleau 2, donc de la grille, et d'amplifier le refroidissement du barreau 1, donc d'augmenter sa durée de vie.Thus, the fins 7, 8 of determined shape and position allow an optimization of the combustion. Thanks to the parallel offset between fins 7, 8 on either side of the longitudinal core 6, calibrated channels 14 are created. This makes it possible to increase the flow of combustion air over the surface of the bar 1, therefore of the roller 2, and therefore of the grid, and to amplify the cooling of the bar 1, therefore to increase its life.

Le phénomène d'air précipité qui en découle, permet de nettoyer naturellement les intervalles de soufflage et de créer un effet de ramonage en soulevant le combustible de la surface de la grille, ce qui maintient une combustion optimale et stable dans le temps.The phenomenon of precipitated air which results from it, makes it possible to naturally clean the blowing intervals and to create a sweeping effect by lifting the fuel from the surface of the grate, which maintains an optimal and stable combustion over time.

En outre, la configuration avec les ailettes 7, 8, positionnées perpendiculairement aux faces latérales de l'âme longitudinale 6 du barreau 1, permet de limiter la pénétration des fines et des coulées métalliques (aluminium), dans la structure du rouleau 1, évitant ainsi les bourrages à l'intérieur du rouleau 2, qui pourraient provoquer sa déformation.In addition, the configuration with the fins 7, 8, positioned perpendicular to the side faces of the longitudinal web 6 of the bar 1, makes it possible to limit the penetration of fines and metal castings (aluminum), into the structure of the roller 1, avoiding thus the jams inside the roller 2, which could cause its deformation.

La présente description est donnée à titre d'exemple et n'est pas limitative de l'invention.The present description is given by way of example and is not limiting of the invention.

En particulier, l'invention ne se limite pas à l'exemple illustré dans les figures dans lequel les ailettes présentent une forme en S, ni à un nombre déterminé d'ailettes par barreau.In particular, the invention is not limited to the example illustrated in the figures in which the fins have an S-shape, nor to a determined number of fins per bar.

Claims (14)

  1. Bar (1) for a for an incinerator furnace hearth grate roll (2), comprising:
    - a plate (3) of arcuate shape in the longitudinal direction of the bar (1) and whose upper surface is intended to receive waste to be incinerated, said plate (3) extending at two respectively rear and front ends (4, 5),
    - a longitudinal core (6) formed integrally with the plate (3), located under this plate (3) and extending on the one hand perpendicularly from the lower surface of the plate (3) to a lower edge, and on the other hand at least partially between the rear and front ends (4, 5) of the plate (3),
    - a first and a second group of several fins (7, 8), arranged under the plate (3) respectively on each side of the longitudinal core (6), each fin (7, 8) extending on the one hand from the longitudinal core (6) and on the other hand from the lower surface of the plate (3),
    characterized in that each fin (7, 8) extends from the longitudinal core (6) so as to present a portion which protrudes from the plate (3), and in that each fin (7) of the first group has a overall shape substantially identical and parallel to the overall shape of a determined fin (8) of the second group and is arranged offset relative to this determined fin (8) of the second group according to a given offset, so that, when the bar (1) is placed on a roll (2) of an incinerator furnace grate juxtaposed with a neighbouring bar (10, 11), the portion of each fin (7) of the first group of the bar (1) protruding from the plate (3) defines, with the portion of the fin (8) determined from the second group of the neighbouring bar (10, 11) protruding from the plate of this neighbouring bar (10, 11), a channel (14) of calibrated air circulation.
  2. Bar (1) according to claim 1, characterized in that at least part of the fins (7, 8) extend from the lower surface of the plate (3) to the lower edge of the longitudinal core (6).
  3. Bar (1) according to any one of claims 1 and 2, characterized in that at least part of the fins (7, 8) extend from the lower surface of the plate (3) and stop before the lower edge of the longitudinal core (6).
  4. Bar (1) according to claim 3, characterized in that the longitudinal core (6) comprises a through hole (15) intended to receive a connecting rod making it possible to link several bars (1, 10, 11) together, and in that each of the first and second groups of fins (7, 8) comprises at least two fins (7, 8) extending from the lower surface of the plate (3) and stopping before the lower edge of the longitudinal core (6) and distributed on either side of the through hole (15).
  5. Bar (1) according to claim 4, characterized in that each of the at least two fins (7, 8) extends from the lower surface of the plate (3) in a direction substantially perpendicular to the tangent to the arcuate upper surface of the plate (3) in the projection of the junction point of the corresponding fin (7, 8) with the lower surface of the plate (3) on this upper surface of the plate (3).
  6. Bar (1) according to any one of claims 1 to 5, characterized in that each fin (7, 8) of at least part of the fins (7, 8) extends from the lower surface of the plate (3) in a direction substantially inclined with respect to the tangent to the upper arcuate surface of the plate (3) in the projection of the junction point of the corresponding fin (7, 8) with the lower surface of the plate (3) on this upper surface of the plate (3).
  7. Bar (1) according to any one of claims 1 to 6, characterized in that each fin (7, 8) of at least part of the fins (7, 8) extends from the lower surface of the plate (3) in a main direction, and has an overall S-shape centred on said main direction.
  8. Grid roll (2) for an incinerator furnace hearth comprising at least two longitudinal members (12) extending parallel to the axis of the roll (2) along two respective generative lines of the roller (2), characterized in that it comprises at least one bar (1, 10, 11) according to any one of claims 1 to 7 and the front and rear ends (4, 5) of which are placed respectively on the two side members (12).
  9. Roll (2) according to Claim 8, characterized in that the bar (1, 10, 11) is arranged perpendicular to the generative lines of the roller (2).
  10. Roll (2) according to any one of claims 8 and 9, characterized in that it comprises several bars according to any one of claims 1 to 7 arranged end to end so as to form a ring on the surface of the roll (2).
  11. Roll (2) according to any one of claims 8 to 10, characterized in that it comprises several bars (1, 10, 11) according to any one of claims 1 to 7, arranged two by two adjacent and extending perpendicular to the generative lines of the roll (2).
  12. Roll (2) according to Claim 11, characterized in that it comprises at least two bars (1, 10, 11) according to any one of claims 4 and 5, arranged adjacent and extending perpendicularly to the generative lines of the roll (2), and linked together by means of a connecting rod passing through the through holes (15) of each of the at least two bars (1, 10, 11).
  13. Roll (2) according to any one of claims 11 and 12, characterized in that at least two bars (1, 10, 11) arranged adjacent form a group of bars (1, 10, 11) framed on both sides by two segments (13) of two intermediate rings (9).
  14. Grate for an incinerator furnace hearth comprising at least one roll (2) according to any one of claims 8 to 13.
EP20020189.5A 2019-04-23 2020-04-22 Bar for grate roller for incinerator furnace fireplace with improved air circulation, corresponding roller and grate Active EP3730838B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1904286A FR3095498B1 (en) 2019-04-23 2019-04-23 Grate roller bar for improved air circulation incinerator furnace hearth, matching roller and grate

Publications (2)

Publication Number Publication Date
EP3730838A1 EP3730838A1 (en) 2020-10-28
EP3730838B1 true EP3730838B1 (en) 2021-12-01

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ID=68072575

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20020189.5A Active EP3730838B1 (en) 2019-04-23 2020-04-22 Bar for grate roller for incinerator furnace fireplace with improved air circulation, corresponding roller and grate

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EP (1) EP3730838B1 (en)
FR (1) FR3095498B1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1783200C2 (en) * 1968-05-28 1980-07-10 Prvni Brnenska Strojirna, Zavody Klementa Gottwalda, N.P., Bruenn (Tschechoslowakei) Incineration grate for the incineration of urban and industrial waste
DE3618606C2 (en) * 1986-06-03 1993-12-23 Theodor Koch Roller grate and grate bar for a roller grate
DE59005994D1 (en) * 1989-05-10 1994-07-14 Babcock Anlagen Ag Grate bar and grate roller.
FR2885404A1 (en) 2005-05-03 2006-11-10 Saretco Sa GRID BAR AND GRID FOR FIREPLACE WITH SOLIDARITY GRADES WITH DIRECT AIR COMBUSTION

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Publication number Publication date
FR3095498A1 (en) 2020-10-30
FR3095498B1 (en) 2021-05-21
EP3730838A1 (en) 2020-10-28

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