EP3779278A1 - Grid unit with tier for furnace grate of an incinerator, and corresponding support - Google Patents

Grid unit with tier for furnace grate of an incinerator, and corresponding support Download PDF

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Publication number
EP3779278A1
EP3779278A1 EP20190295.4A EP20190295A EP3779278A1 EP 3779278 A1 EP3779278 A1 EP 3779278A1 EP 20190295 A EP20190295 A EP 20190295A EP 3779278 A1 EP3779278 A1 EP 3779278A1
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EP
European Patent Office
Prior art keywords
downstream
upstream
block
support
adjacent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20190295.4A
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German (de)
French (fr)
Inventor
André SIMPER
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Saretco
Original Assignee
Saretco
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Publication date
Application filed by Saretco filed Critical Saretco
Publication of EP3779278A1 publication Critical patent/EP3779278A1/en
Withdrawn legal-status Critical Current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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H1/00—Grates with solid bars
    • F23H1/02—Grates with solid bars having provision for air supply or air preheating, e.g. air-supply or blast fittings which form a part of the grate structure or serve as supports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H17/00—Details of grates
    • F23H17/08—Bearers; Frames; Spacers; Supports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H7/00—Inclined or stepped grates
    • F23H7/02—Inclined or stepped grates with fixed bars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H7/00—Inclined or stepped grates
    • F23H7/06—Inclined or stepped grates with movable bars disposed parallel to direction of fuel feeding
    • F23H7/08—Inclined or stepped grates with movable bars disposed parallel to direction of fuel feeding reciprocating along their axes
    • 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
    • F23H9/04—Grates rocked as a whole
    • 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
    • F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/02—Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/10—Tops for chimneys or ventilating shafts; Terminals for flues wherein the top moves as a whole
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2203/00—Furnace arrangements
    • F23G2203/101—Furnace arrangements with stepped or inclined grate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2203/00—Furnace arrangements
    • F23G2203/50—Fluidised bed furnace
    • F23G2203/505—Fluidised bed furnace with fluidised bed rotated as a whole
    • 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
    • F23H2700/002—Inclined grates with longitudinally movable gratebars
    • 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
    • F23H2700/009—Grates specially adapted for incinerators

Definitions

  • the present invention relates to a stepped grate block for an incinerator furnace hearth, as well as a corresponding support.
  • the invention also relates to a grid provided with such blocks and supports.
  • the invention finds application in particular to the incineration of standard waste, as well as special waste such as solid recovered fuels (SRF).
  • a stepped grid conventionally comprises adjacent rows, and successive in the direction of advance of the waste, of grid blocks resting on a network of supporting spars parallel to each other.
  • every other side member is adapted to perform a pendulum movement, the other side members being fixed, which facilitates the advance of the waste.
  • Grid blocks are generally made up of two cast iron castings in refractory steel, linked together by two (case of half-blocks) or four transverse steel rods (case of whole blocks). Each block is then filled with cast iron or refractory steel bars resting on the transverse rods. These bars are provided with lugs on each side, which form passages to allow the primary air coming from below the grille to be diffused. This primary air allows on the one hand the combustion of the incinerated product on the blocks of the grate, and on the other hand to cool the bars.
  • Such a stepped grid is for example described in WO 2006/119777 or EP 1 036 986 .
  • the grate blocks are subjected to very severe thermal stresses, between the heating due to thermal radiation and contact with the materials in combustion, and the cooling resulting from the blowing of combustion air
  • the mounting games allow freedom of movement of the bars on the steel rods in the grid block. This creates random air passages, and ultimately leads to a very large primary air pressure drop.
  • the grid blocks are subject to friction on the side faces due to the design and operation of the grids (alternation of fixed and mobile spars). These grid blocks also undergo wear by thermal effect produced by the burning waste, just like the bars lining it. This therefore implies that all the parts (grid blocks and bars) must be assimilated to wearing parts, which therefore requires complete replacement during curative maintenance interventions.
  • the object of the invention is in particular to provide a stepped grid block for an incinerator hearth, a support for fixing such a block on a stepped grid, and a corresponding grid, having a longer life, with a mounting ease and optimization of combustion.
  • a stepped grid block for an incinerator furnace hearth intended to be fixed to one or more parallel longitudinal members of the grid by means of a support, the block comprising a plate having an upper face intended to receive a moving product to be incinerated, and first assembly means configured to allow assembly with the support, the block having an upstream part and a downstream part with respect to the direction of movement of a product to be incinerated on the upper surface of the tray.
  • the block further comprises first centering and alignment means distinct and independent of the first assembly means, configured to allow the centering and alignment of the upstream and downstream parts of the block respectively with the downstream part of an adjacent block upstream and the upstream part of a downstream adjacent block, said upstream and downstream adjacent blocks being mounted respectively on two upstream and downstream supports, by direct assembly of the block respectively with the upstream and downstream adjacent blocks, the first centering and alignment comprising at least one lug formed in the downstream part, under the plate, and at least one slot formed in the upstream part, above the plate and open upstream, the lug being intended to engage in the slot of the adjacent downstream block.
  • a stepped grid block support for an incinerator furnace hearth, intended for fixing a block as presented above, on one or more of the longitudinal members.
  • the support comprising second assembly means configured to allow assembly with the side member (s), the support having an upstream part and a downstream part relative to the direction of movement of a product to be incinerated on the upper surface of the plate of the block, the support also comprising second centering and alignment means configured to allow the centering and alignment of the support with respect to two adjacent supports upstream and downstream respectively carrying two upstream and downstream blocks respectively.
  • the support further comprises third assembly means configured to allow assembly with the block by cooperation with the first assembly means without participating in the centering and alignment of the block with respect to the adjacent upstream and downstream blocks, mounted respectively on the two upstream and downstream supports.
  • a further subject of the invention is a stepped grid for an incinerator furnace hearth comprising one or more parallel longitudinal members, comprising at least one block as presented above, mounted on at least one of the housings by the 'intermediary of a support as presented above.
  • the grid comprises at least three blocks as presented above, assembled in pairs adjacent to upstream to downstream and mounted on at least one of the housings by means of three supports, respectively, as presented above. assembled in pairs from upstream to downstream.
  • the block and the support of the invention facilitate the assembly of the corresponding grid, by a simplified assembly.
  • the elimination of uncontrolled play makes it possible to control the air passages, thus facilitating fine adjustment of the combustion by the operator.
  • the elimination of these clearances limits wear on the blocks.
  • Each step of the grid thus has better resistance to thermal shock, abrasion, oxidation and corrosion, and therefore greater longevity.
  • the stepped grate for a hearth for an incineration furnace comprises rows of blocks, as shown in particular on the figures 1a and 1b , and as an exemplary embodiment.
  • the section plane corresponding to the figure 1b also parallel to the side members 16 and to the main movement of the waste from upstream to downstream, passes through the central axis of the plate 3, therefore through the slot 31 of the figure 2 and lug 30 of the figure 3 which will be described in more detail a little later with reference to these figures 2 and 3 .
  • the stepped grid comprising one or more parallel longitudinal members 16, on which or which blocks 1, 12, 13 are mounted, in particular one or more blocks according to the invention which will be described in more detail below, by means of the respective supports 2, 14, 15, in particular one or more supports according to the invention which will also be described in more detail below.
  • At least three blocks 1, 12, 13 according to the invention are assembled in pairs adjacent to them from upstream to downstream with respect to the direction of advance of the waste on the trays 3 of the blocks.
  • at least three supports 2, 14, 15 according to the invention are used to mount the blocks 1, 12, 13 on the parallel beam (s). 16.
  • the blocks such as blocks 1, 12, 13 are mounted in successive rows and in adjacent rows, on two parallel side members for each adjacent row.
  • the groups of two side members of each row are parallel to each other, one group in two being fixed and the other being mobile, as explained above, to facilitate combustion and the advancement of the waste from upstream to downstream.
  • the two end blocks differ from the intermediate blocks 1, 12, 13, insofar as the upstream end block is not assembled with a previous upstream block, and where the downstream end block is not assembled with a block downstream.
  • the two end supports differ from the intermediate supports 2, 14, 15 insofar as the upstream end support is not assembled with a previous upstream support, and where the downstream end support is not assembled with downstream support.
  • FIGS. 2 and 3 show in more detail, respectively seen from above and seen from below, an example of a block according to the invention, such as block 1 of figures 1a and 1b .
  • First assembly means 4 are provided. These first assembly means 4 are configured to allow assembly with the corresponding support, such as the support 2 of figures 1 , 4 and 5 , which will be described in more detail below.
  • Block 1 has an upstream part 5 and a downstream part 6 relative to the direction of movement of the products to be incinerated on the upper surface of the plate 3.
  • the block 1 comprises first centering and alignment means 30, 31.
  • centering and alignment means 30, 31 are distinct and independent of the first assembly means 4, and configured to allow the centering and alignment of the block 1 with respect to two adjacent blocks respectively upstream 12 and downstream 13 mounted respectively on two supports upstream 14 and downstream 15, (such as represented on the figures 1a and 1b ). This centering and this alignment are obtained by direct assembly of the block 1 respectively with the adjacent upstream 12 and downstream 13 blocks.
  • the support 2 does not participate in the centering and in the alignment of the blocks with respect to one another.
  • the first centering and alignment means 30, 31 are configured to allow the assembly of the upstream 5 and downstream 6 parts of the block 1, respectively with the downstream part of the upstream adjacent block 12 and the upstream part of the downstream adjacent block 13 .
  • These first centering and alignment means 7 to 11 comprise at least one lug 30 and at least one slot 31.
  • the lug 30 is formed in the downstream part 6, under the plate 3.
  • the slot 31 is formed in the upstream part 5, above the plate 3, and open upstream.
  • the lug 30 is intended to engage in the slot of the adjacent downstream block 13 (see also figure 1b ).
  • the block 1 comprises one or more return 9, a single return 9 precisely in this example, and at least one groove 10, 11, two grooves 10 and 11 precisely in this example.
  • the return 9 is formed in the downstream part 6, under the plate 3, and directed upstream.
  • the lug 30 extends from this return 9 in a direction substantially perpendicular to the plate 3.
  • the return 9 extends under the plate 3 substantially over the entire transverse dimension of the block 1.
  • a reinforcing connection 33 is provided between the return 9 and the underside of the plate 3, at the level of the lug 30.
  • the grooves 10 and 11 are formed in overhangs 7 and 8 above the plate 3 and open downstream.
  • the return 9 of block 1 is intended to engage in the groove of the adjacent downstream block 13 (see figure 1a ) by sliding from downstream to upstream.
  • the return 9 extends transversely under the plate 3, over a distance and at a position such that it can cooperate with the grooves of the adjacent downstream block 13.
  • the return 9 extends under the plate 3 substantially over the entire length. the transverse dimension of block 1 as shown in figure 3 . From the point of view of manufacturing in the foundry, it is in fact easier and less expensive to create this return 9 over the entire transverse dimension of the block 1.
  • this return 9 could be partial transversely, or be formed from several partial returns. , as long as it / they are of suitable size (s) and position (s) in relation to the grooves 10 and 11.
  • the two grooves 10 and 11 are for their part distributed in the upstream part 5 along the transverse dimension of the block 1.
  • a single groove, extending partially or entirely transversely could be used.
  • the position of the groove or grooves 10 and 11 is conditioned by the position of the first assembly means 4 as will be seen below.
  • the groove (s) 10, 11 must be of suitable size (s) and position (s) with respect to the return (s) 9 in the downstream part 6, for the upstream / downstream assembly and downstream / upstream of blocks 1, 12, 13 two by two (see figure 1a ).
  • the slot 31 is formed in the upstream part 5, between the two grooves 10 and 11.
  • this slot 31 at the level of the lower face of the plate 3, there is provided a reinforcing link 32 between the plate 3 and the upstream part 5 of the block 1.
  • the first assembly means 4 comprise at least one assembly point 4 formed in the upstream part 5 between the two grooves 10, 11, preferably in a central position on the transverse dimension.
  • the first assembly means 4 comprise at least one assembly point 4 formed in the upstream part 5 between the two grooves 10, 11, preferably in a central position on the transverse dimension.
  • This or these assembly points 4 may be a hole 4 which cooperates, by bolting, with the corresponding assembly means of the support 2 which will be described in more detail below, such as another hole in this support 2.
  • the plate 3 preferably comprises openings 17 for the passage of air. These openings 17 are distributed from the upstream part 5 to the downstream part 6. Each opening 17 is provided on its periphery with a protective edge 18, intended to prevent a liquid material flowing on the plate 3 from entering the areas. openings 17 and plug them.
  • FIGS. 4 and 5 show in more detail, respectively seen from above and seen from below, an example of a support according to the invention, such as support 2 of the figures 1a and 1b .
  • the support 2 thus comprises second assembly means 19, 20 configured to allow assembly with the side member (s) 16 of the grid.
  • the support 2 has an upstream part 22 and a downstream part 23 with respect to the direction of movement of a product to be incinerated on the upper surface of the plate 3 of the block 1 described above.
  • This support 2 further comprises second centering and alignment means 24, 25.
  • the latter are configured to allow the centering and alignment of the support 2 with respect to two adjacent supports respectively upstream 14 and downstream 15 respectively carrying two blocks. upstream 12 and downstream 13 (see figures 1a and 1b ).
  • third assembly means 21 are provided. The latter are configured to allow assembly with the block 1. This assembly is obtained by cooperation of these third assembly means 21 with the first assembly means 4 of the block 1, without these third assembly means 21 not participate in the centering and alignment of block 1 by compared to the adjacent upstream 12 and downstream 13 blocks mounted respectively on the two upstream 14 and downstream 15 supports.
  • the second centering and alignment means 24, 25 are configured to allow the assembly of the upstream 22 and downstream 23 parts of the support 2 respectively with the downstream part of the upstream adjacent support 14 and the upstream part of the downstream adjacent support 15 ( see figures 1a and 1b ).
  • These second centering and alignment means 24, 25 comprise a housing 25 and nose 24.
  • the housing 25 is formed in the upstream part 22. Preferably, this housing 25 is surmounted by an extra thickness of reinforcement 26.
  • the nose 24 is for its part formed in the downstream part 23 and has a shape configured to be able to be housed in the housing of the upstream part of the adjacent downstream support 15.
  • the upstream and downstream parts 22, 23 of the support (2) extend transversely with respect to the direction of advance of the waste on the respective trays of the blocks mounted on the grid.
  • the support 2 then comprises two longitudinal extensions 27, 28 which start from the upstream part 22 and meet in the downstream part 23.
  • the third assembly means 21, preferably comprising at least one assembly point 21, are supported by an intermediate part 29 which also extends transversely and which is arranged between the upstream and downstream parts 22, 23, raised relative to the latter.
  • the block of the invention on the one hand, and the support of the invention on the other hand allow centering and self-alignment of the blocks with respect to each other. 'on the one hand, and supports relative to each other on the other hand.
  • the supports integral with the side members without participating in the centering and alignment of the blocks, become intermediate mounting elements, and are considered as work pieces and not wear parts. Only the blocks are wearing parts, which can undergo erosion due to the friction generated during the movements of some of the side members, to thermal heating and the passage of waste. In the context of the maintenance of such a stepped grid, the support replacement cycle can be much longer than that of the blocks, which reduces the cost of this maintenance.
  • an oven equipped with a stepped grid according to the invention made it possible to obtain an increase in the nominal capacity of the oven which may be greater than 15%, in terms of the time required for the incineration of '' a given volume of waste, or in terms of the volume of waste that can be incinerated in a given time.

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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)

Abstract

L'invention concerne un bloc de grille à gradins pour foyer de four d'incinérateur, ainsi qu'un support correspondant. L'invention concerne également une grille pourvue de tels blocs et supports, et trouve notamment une application à l'incinération des déchets standard, tout comme des déchets spéciaux tels que les combustibles solides de récupération (CSR).Le bloc 1 est destiné à être fixé sur un ou plusieurs longerons 16 parallèles de la grille par l'intermédiaire d'un support 2, et comprend un plateau 3 présentant une face supérieure destinée à recevoir un produit à incinérer en mouvement, et des premiers moyens d'assemblage configurés pour permettre l'assemblage avec le support 2, le bloc 1 présentant une partie amont et une partie avale par rapport au sens de déplacement d'un produit à incinérer sur la surface supérieure du plateau 3.Le bloc 1 comprend en outre des premiers moyens de centrage et d'alignement distincts et indépendants des premiers moyens d'assemblage, configurés pour permettre le centrage et l'alignement des parties amont et aval du bloc 1 respectivement avec la partie avale d'un bloc adjacent amont 12 et la partie amont d'un bloc adjacent aval 13, ces blocs adjacents 12, 13cétant montés respectivement sur deux supports amont 14 et aval 15, par assemblage direct du bloc 1 respectivement avec ces blocs adjacent 12, 13, les premiers moyens de centrage et d'alignement comprenant au moins un ergot formé dans la partie aval, sous le plateau, et au moins une fente formée dans la partie amont, au-dessus du plateau et ouverte vers l'amont, l'ergot étant destiné à s'engager dans la fente du bloc adjacent aval.The invention relates to a stepped grate block for an incinerator furnace hearth, as well as a corresponding support. The invention also relates to a grid provided with such blocks and supports, and finds in particular an application to the incineration of standard waste, as well as special waste such as solid recovered fuels (CSR). Block 1 is intended to be fixed to one or more parallel longitudinal members 16 of the grid by means of a support 2, and comprises a plate 3 having an upper face intended to receive a product to be incinerated in motion, and first assembly means configured to allow the assembly with the support 2, the block 1 having an upstream part and a downstream part with respect to the direction of movement of a product to be incinerated on the upper surface of the plate 3. The block 1 further comprises first centering means and separate and independent alignment of the first assembly means, configured to allow the centering and alignment of the upstream and downstream parts of the block 1 respectively with the downstream part of a bl oc adjacent upstream 12 and the upstream part of an adjacent downstream block 13, these adjacent blocks 12, 13cétant respectively mounted on two upstream 14 and downstream 15 supports, by direct assembly of the block 1 respectively with these adjacent blocks 12, 13, the first centering and alignment means comprising at least one lug formed in the downstream part, under the plate, and at least one slot formed in the upstream part, above the plate and open upstream, the lug being intended to engage in the slot of the adjacent downstream block.

Description

La présente invention concerne un bloc de grille à gradins pour foyer de four d'incinérateur, ainsi qu'un support correspondant. L'invention concerne également une grille pourvue de tels blocs et supports. L'invention trouve notamment une application à l'incinération des déchets standard, tout comme des déchets spéciaux tels que les combustibles solides de récupération (CSR).The present invention relates to a stepped grate block for an incinerator furnace hearth, as well as a corresponding support. The invention also relates to a grid provided with such blocks and supports. The invention finds application in particular to the incineration of standard waste, as well as special waste such as solid recovered fuels (SRF).

Une grille à gradins comprend de manière classique des rangées adjacentes, et successives dans le sens d'avancement des déchets, de blocs de grille reposant sur un réseau de longerons porteurs parallèles entre eux.A stepped grid conventionally comprises adjacent rows, and successive in the direction of advance of the waste, of grid blocks resting on a network of supporting spars parallel to each other.

Dans le sens perpendiculaire à l'avance des déchets, donc aux rangées de blocs de grille, un longeron sur deux est adapté pour réaliser un mouvement pendulaire, les autres longerons étant fixes, ce qui facilite l'avancée des déchets.In the direction perpendicular to the advance of the waste, therefore to the rows of grid blocks, every other side member is adapted to perform a pendulum movement, the other side members being fixed, which facilitates the advance of the waste.

Les blocs de grille sont généralement composés de deux flancs moulés de fonderie en acier réfractaire, reliés entre eux par deux (cas de demi-blocs) ou quatre tiges d'acier transversales (cas de blocs entiers). Chaque bloc est ensuite rempli de barreaux en fonte ou en acier réfractaire reposant sur les tiges transversales. Ces barreaux sont pourvus d'ergots sur chaque côté, qui forment des passages pour permettre à l'air primaire venant du dessous de la grille d'être diffusé. Cet air primaire permet d'une part la combustion du produit incinéré sur les blocs de la grille, et d'autre part de refroidir les barreaux.Grid blocks are generally made up of two cast iron castings in refractory steel, linked together by two (case of half-blocks) or four transverse steel rods (case of whole blocks). Each block is then filled with cast iron or refractory steel bars resting on the transverse rods. These bars are provided with lugs on each side, which form passages to allow the primary air coming from below the grille to be diffused. This primary air allows on the one hand the combustion of the incinerated product on the blocks of the grate, and on the other hand to cool the bars.

Une telle grille à gradins est par exemple décrite dans WO 2006/119777 ou EP 1 036 986 .Such a stepped grid is for example described in WO 2006/119777 or EP 1 036 986 .

Les blocs de grille 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 comburantThe grate blocks are subjected to very severe thermal stresses, between the heating due to thermal radiation and contact with the materials in combustion, and the cooling resulting from the blowing of combustion air

Bien que l'entretien de ces grilles soit réalisable par le dessus de la grille et avec des outils simples, ces grilles présentent plusieurs inconvénients.Although the maintenance of these screens can be carried out from above the grille and with simple tools, these screens have several drawbacks.

Premièrement, de par la méthode de fabrication des pièces, des jeux importants sont nécessaires pour permettre un assemblage des pièces entre elles, ce qui conduit notamment à deux problèmes qui nuisent au bon fonctionnement.First, due to the method of manufacturing the parts, large clearances are necessary to allow the parts to be assembled together, which leads in particular to two problems which adversely affect correct operation.

D'une part, même si, comme précisé ci-dessus, des ergots sont prévus sur les barreaux, les jeux de montage laissent une liberté de mouvement des barreaux sur les tiges d'acier dans le bloc de grille. Cela crée des passages d'air aléatoires, et conduit finalement à une perte de charge d'air primaire très importante.On the one hand, even if, as specified above, lugs are provided on the bars, the mounting games allow freedom of movement of the bars on the steel rods in the grid block. This creates random air passages, and ultimately leads to a very large primary air pressure drop.

D'autre part, la régularité des sections de passages d'air n'étant pas assurée, la combustion du déchet en subit les conséquences, et il est impossible pour l'opérateur de maintenir sur la durée un réglage adéquat de son installation pour garantir une combustion du déchet homogène.On the other hand, the regularity of the air passage sections is not guaranteed, the combustion of the waste suffers the consequences, and it is impossible for the operator to maintain over time an adequate adjustment of his installation to guarantee homogeneous combustion of the waste.

Deuxièmement, les blocs de grille subissent des frottements sur les faces latérales de par la conception et le fonctionnement des grilles (alternance de longerons fixes et mobiles). Ces blocs de grille subissent également une usure par effet thermique produit par le déchet en combustion, tout comme les barreaux le garnissant. Ceci implique donc que l'ensemble des pièces (blocs de grille et barreaux) doivent être assimilées à des pièces d'usure, ce qui requière donc un remplacement intégral lors des interventions de maintenance curative.Second, the grid blocks are subject to friction on the side faces due to the design and operation of the grids (alternation of fixed and mobile spars). These grid blocks also undergo wear by thermal effect produced by the burning waste, just like the bars lining it. This therefore implies that all the parts (grid blocks and bars) must be assimilated to wearing parts, which therefore requires complete replacement during curative maintenance interventions.

Un des buts de l'invention est donc de résoudre notamment les problèmes précités. Ainsi, l'invention a notamment pour objectif de proposer un bloc de grille à gradins pour foyer d'incinérateur, un support pour fixer un tel bloc sur une grille à gradins, et une grille correspondante, présentant une plus grande longévité, avec un montage facilité et une optimisation de la combustion.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 stepped grid block for an incinerator hearth, a support for fixing such a block on a stepped grid, and a corresponding grid, having a longer life, with a mounting ease and optimization of combustion.

L'invention a ainsi pour objet, selon un premier aspect, un bloc de grille à gradins pour foyer de four d'incinérateur, destiné à être fixé sur un ou plusieurs longerons parallèles de la grille par l'intermédiaire d'un support, le bloc comprenant un plateau présentant une face supérieure destinée à recevoir un produit à incinérer en mouvement, et des premiers moyens d'assemblage configurés pour permettre l'assemblage avec le support, le bloc présentant une partie amont et une partie avale par rapport au sens de déplacement d'un produit à incinérer sur la surface supérieure du plateau.The subject of the invention is thus, according to a first aspect, a stepped grid block for an incinerator furnace hearth, intended to be fixed to one or more parallel longitudinal members of the grid by means of a support, the block comprising a plate having an upper face intended to receive a moving product to be incinerated, and first assembly means configured to allow assembly with the support, the block having an upstream part and a downstream part with respect to the direction of movement of a product to be incinerated on the upper surface of the tray.

Le bloc comprend en outre des premiers moyens de centrage et d'alignement distincts et indépendants des premiers moyens d'assemblage, configurés pour permettre le centrage et l'alignement des parties amont et aval du bloc respectivement avec la partie avale d'un bloc adjacent amont et la partie amont d'un bloc adjacent aval, lesdits blocs adjacents amont et aval étant montés respectivement sur deux supports amont et aval, par assemblage direct du bloc respectivement avec les blocs adjacent amont et aval, les premiers moyens de centrage et d'alignement comprenant au moins un ergot formé dans la partie aval, sous le plateau, et au moins une fente formée dans la partie amont, au-dessus du plateau et ouverte vers l'amont, l'ergot étant destiné à s'engager dans la fente du bloc adjacent aval.The block further comprises first centering and alignment means distinct and independent of the first assembly means, configured to allow the centering and alignment of the upstream and downstream parts of the block respectively with the downstream part of an adjacent block upstream and the upstream part of a downstream adjacent block, said upstream and downstream adjacent blocks being mounted respectively on two upstream and downstream supports, by direct assembly of the block respectively with the upstream and downstream adjacent blocks, the first centering and alignment comprising at least one lug formed in the downstream part, under the plate, and at least one slot formed in the upstream part, above the plate and open upstream, the lug being intended to engage in the slot of the adjacent downstream block.

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

  • le bloc comprend un ou plusieurs retours formés dans la partie aval, sous le plateau, et dirigés vers l'amont, et l'ergot s'étend depuis l'un de ces retours dans une direction sensiblement perpendiculaire au plateau ;
  • le bloc comprend un unique retour s'étendant sous le plateau sensiblement sur toute la dimension transverse du bloc ;
  • le bloc comprend au moins une gorge formée dans la partie amont, au-dessus du plateau et ouverte vers l'aval, le ou les retours étant destinés à s'engager dans la gorge du bloc adjacent aval par glissement de l'aval vers l'amont ;
  • le bloc comprend au moins deux gorges formées dans la partie amont, au-dessus du plateau et orientées vers l'aval, réparties le long de la dimension transverse du bloc, le retour étant destinés à s'engager dans les gorges du bloc adjacent aval par glissement de l'aval vers l'amont ;
  • la fente est formé dans la partie amont, entre les deux gorges ;
  • les premiers moyens d'assemblage comprennent au moins un point d'assemblage formé dans la partie amont, entre les deux gorges ;
  • le plateau comprend des ouvertures de passage d'air réparties depuis la partie amont jusqu'à la partie aval, chacune étant pourvues sur leur pourtour de bordures de protection destinées à permettre l'écoulement de matière liquide sur le plateau sans risque de pénétration de cette matière liquide dans les ouvertures.
According to certain embodiments, the unit further comprises one or more of the following characteristics, taken in isolation or according to any technically possible combination:
  • the block comprises one or more returns formed in the downstream part, under the plate, and directed upstream, and the lug extends from one of these returns in a direction substantially perpendicular to the plate;
  • the block comprises a single return extending under the plate substantially over the entire transverse dimension of the block;
  • the block comprises at least one groove formed in the upstream part, above the plate and open towards the downstream, the return (s) being intended to engage in the groove of the adjacent downstream block by sliding downstream towards the 'upstream;
  • the block comprises at least two grooves formed in the upstream part, above the plate and oriented downstream, distributed along the transverse dimension of the block, the return being intended to engage in the grooves of the adjacent downstream block by sliding from downstream to upstream;
  • the slot is formed in the upstream part, between the two grooves;
  • the first assembly means comprise at least one assembly point formed in the upstream part, between the two grooves;
  • the plate comprises air passage openings distributed from the upstream part to the downstream part, each being provided on their periphery with protective edges intended to allow the flow of liquid material on the tray without any risk of this liquid material entering the openings.

L'invention a également pour objet, selon un deuxième aspect, un support de bloc de grille à gradins pour foyer de four d'incinérateur, destiné à la fixation d'un bloc tel que présenté ci-dessus, sur un ou plusieurs des longerons parallèles de la grille, le support comprenant des deuxièmes moyens d'assemblage configurés pour permettre l'assemblage avec le ou les longerons, le support présentant une partie amont et une partie avale par rapport au sens de déplacement d'un produit à incinérer sur la surface supérieure du plateau du bloc, le support comprenant également des deuxièmes moyens de centrage et d'alignement configurés pour permettre le centrage et l'alignement du support par rapport à deux supports adjacents respectivement amont et aval portant respectivement deux blocs amonts et aval.Another subject of the invention, according to a second aspect, is a stepped grid block support for an incinerator furnace hearth, intended for fixing a block as presented above, on one or more of the longitudinal members. parallel to the grid, the support comprising second assembly means configured to allow assembly with the side member (s), the support having an upstream part and a downstream part relative to the direction of movement of a product to be incinerated on the upper surface of the plate of the block, the support also comprising second centering and alignment means configured to allow the centering and alignment of the support with respect to two adjacent supports upstream and downstream respectively carrying two upstream and downstream blocks respectively.

Le support comprend en outre des troisièmes moyens d'assemblage configurés pour permettre l'assemblage avec le bloc par coopération avec les premiers moyens d'assemblage sans participer au centrage et à l'alignement du bloc par rapport aux blocs adjacent amont et aval, montés respectivement sur les deux supports amont et aval.The support further comprises third assembly means configured to allow assembly with the block by cooperation with the first assembly means without participating in the centering and alignment of the block with respect to the adjacent upstream and downstream blocks, mounted respectively on the two upstream and downstream supports.

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

  • les deuxièmes moyens de centrage et d'alignement sont configurés pour permettre l'assemblage des parties amont et aval du support respectivement avec la partie avale du support adjacent amont et la partie amont du support adjacent aval ;
  • les deuxièmes moyens de centrage et d'alignement comprennent un logement formé dans la partie amont du support, et un nez formé dans la partie aval du support et présentant une forme configurée pour pouvoir être logée dans le logement de la partie amont du support adjacent aval ;
  • le logement est surmonté d'une surépaisseur de renfort ;
  • les parties amont et aval du support s'étendent transversalement, le support comprenant deux extensions longitudinales qui partent de ladite partie amont et se rejoignent en ladite partie aval, les troisièmes moyens d'assemblage comprenant au moins un point d'assemblage supporté par une partie intermédiaire s'étendant transversalement et disposée entre les parties amont et aval.
According to some embodiments, the support further comprises one or more of the following characteristics, taken in isolation or in any technically possible combination:
  • the second centering and alignment means are configured to allow assembly of the upstream and downstream parts of the support respectively with the downstream part of the upstream adjacent support and the upstream part of the downstream adjacent support;
  • the second centering and alignment means comprise a housing formed in the upstream part of the support, and a nose formed in the downstream part of the support and having a shape configured to be able to be housed in the housing of the upstream part of the downstream adjacent support ;
  • the housing is surmounted by an extra thickness of reinforcement;
  • the upstream and downstream parts of the support extend transversely, the support comprising two longitudinal extensions which start from said upstream part and meet in said downstream part, the third assembly means comprising at least one assembly point supported by an intermediate part extending transversely and arranged between the upstream and downstream parts.

L'invention a encore pour objet, selon un troisième aspect, une grille à gradins pour foyer de four d'incinérateur comprenant un ou plusieurs longerons parallèles, comprenant au moins un bloc tel que présenté précédemment, monté sur au moins un des logerons par l'intermédiaire d'un support tel que présenté précédemment.A further subject of the invention, according to a third aspect, is a stepped grid for an incinerator furnace hearth comprising one or more parallel longitudinal members, comprising at least one block as presented above, mounted on at least one of the housings by the 'intermediary of a support as presented above.

De préférence, la grille comprend au moins trois blocs tels que présentés précédemment, assemblés deux à deux de manière adjacente de l'amont vers l'aval et montés sur au moins un des logerons par l'intermédiaire respectivement de trois supports tels que présentés précédemment assemblés deux à deux de manière adjacente de l'amont vers l'aval.Preferably, the grid comprises at least three blocks as presented above, assembled in pairs adjacent to upstream to downstream and mounted on at least one of the housings by means of three supports, respectively, as presented above. assembled in pairs from upstream to downstream.

Ainsi, le bloc et le support de l'invention facilitent le montage de la grille correspondante, par un assemblage simplifié. La suppression des jeux incontrôlés permet de contrôler les passages d'air, donc de faciliter un réglage fin de la combustion par l'opérateur. D'autres part, la suppression de ces jeux limite l'usure sur les blocs.Thus, the block and the support of the invention facilitate the assembly of the corresponding grid, by a simplified assembly. The elimination of uncontrolled play makes it possible to control the air passages, thus facilitating fine adjustment of the combustion by the operator. On the other hand, the elimination of these clearances limits wear on the blocks.

Chaque gradin de la grille présente ainsi une meilleure résistance aux chocs thermiques, à l'abrasion, à l'oxydation et à la corrosion, donc une plus grande longévité.Each step of the grid thus has better resistance to thermal shock, abrasion, oxidation and corrosion, and therefore greater longevity.

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.1a] représentation schématique d'un exemple d'assemblage de plusieurs blocs et supports selon l'invention pour former un gradin, en coupe selon un premier plan parallèle aux longerons de grille et au mouvement principal des déchets de l'amont vers l'aval ;
  • [Fig.1b] représentation schématique d'un exemple d'assemblage de plusieurs blocs et supports selon l'invention pour former un gradin, en coupe selon un deuxième plan parallèle aux longerons de grille et au mouvement principal des déchets de l'amont vers l'aval ;
  • [Fig.2] représentation schématique d'un exemple de bloc selon l'invention, vue en perspective par le dessus ;
  • [Fig.3] représentation schématique de l'exemple de bloc de la figure 2, vue en perspective par le dessous ;
  • [Fig.4] représentation schématique d'un exemple de support selon l'invention, vue en perspective par le dessus ;
  • [Fig.5] représentation schématique de l'exemple de support de la figure 4, vue en perspective 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.1a ] schematic representation of an example of assembly of several blocks and supports according to the invention to form a step, in section along a first plane parallel to the grid spars and to the main movement of the waste from upstream to downstream;
  • [ Fig.1b ] schematic representation of an example of assembly of several blocks and supports according to the invention to form a step, in section along a second plane parallel to the grid spars and to the main movement of waste from upstream to downstream;
  • [ Fig. 2 ] schematic representation of an exemplary block according to the invention, perspective view from above;
  • [ Fig. 3 ] schematic representation of the example block of the figure 2 , perspective view from below;
  • [ Fig. 4 ] schematic representation of an exemplary support according to the invention, perspective view from above;
  • [ Fig. 5 ] schematic representation of the support example of the figure 4 , perspective view from below.

La grille à gradins pour foyer pour four d'incinération selon l'invention comprend des rangées de blocs, tel que représenté notamment sur les figures 1a et 1b, et à titre d'exemple de réalisation.The stepped grate for a hearth for an incineration furnace according to the invention comprises rows of blocks, as shown in particular on the figures 1a and 1b , and as an exemplary embodiment.

Le plan de coupe correspondant à la figure 1a, parallèle aux longerons 16 et au mouvement principal des déchets de l'amont vers l'aval, passe par le surplomb 7 de la figure 2 qui sera décrit plus en détail un peu plus loin en référence à cette figure 2.The section plane corresponding to the figure 1a , parallel to the spars 16 and to the main movement of the waste from upstream to downstream, passes through the overhang 7 of the figure 2 which will be described in more detail a little later with reference to this figure 2 .

Le plan de coupe correspondant à la figure 1b, également parallèle aux longerons 16 et au mouvement principal des déchets de l'amont vers l'aval, passe par l'axe central du plateau 3, donc par la fente 31 de la figure 2 et l'ergot 30 de la figure 3 qui seront décrits plus en détail un peu plus loin en référence à ces figures 2 et 3.The section plane corresponding to the figure 1b , also parallel to the side members 16 and to the main movement of the waste from upstream to downstream, passes through the central axis of the plate 3, therefore through the slot 31 of the figure 2 and lug 30 of the figure 3 which will be described in more detail a little later with reference to these figures 2 and 3 .

La grille à gradin comprenant un ou plusieurs longerons 16 parallèles, sur lequel ou lesquels sont montés des blocs 1, 12, 13, notamment un ou plusieurs blocs selon l'invention qui seront décrits plus en détail ci-après, par l'intermédiaire des supports respectifs 2, 14, 15, notamment un ou plusieurs supports selon l'invention qui seront également décrits plus en détail ci-après.The stepped grid comprising one or more parallel longitudinal members 16, on which or which blocks 1, 12, 13 are mounted, in particular one or more blocks according to the invention which will be described in more detail below, by means of the respective supports 2, 14, 15, in particular one or more supports according to the invention which will also be described in more detail below.

De préférence, au moins trois blocs 1, 12, 13 selon l'invention sont assemblés deux à deux de manière adjacente de l'amont vers l'aval par rapport au sens d'avancée des déchets sur les plateaux 3 des blocs. Respectivement, au moins trois support 2, 14, 15 selon l'invention, également assemblés deux à deux de manière adjacente de l'amont vers l'aval, sont utilisés pour monter les blocs 1, 12, 13 sur le ou les longerons parallèles 16.Preferably, at least three blocks 1, 12, 13 according to the invention are assembled in pairs adjacent to them from upstream to downstream with respect to the direction of advance of the waste on the trays 3 of the blocks. Respectively, at least three supports 2, 14, 15 according to the invention, also assembled two by two adjacent from upstream to downstream, are used to mount the blocks 1, 12, 13 on the parallel beam (s). 16.

Dans un mode de réalisation préféré, les blocs, tels que les blocs 1, 12, 13 sont montés en rangées successives et en rangées adjacentes, sur deux longerons parallèles pour chaque rangée adjacente. Les groupes de deux longerons de chaque rangée sont parallèles entre eux, un groupe sur deux étant fixe et l'autre étant mobile, tel qu'expliqué plus haut, pour faciliter la combustion et l'avancée des déchets de l'amont vers l'aval.In a preferred embodiment, the blocks, such as blocks 1, 12, 13 are mounted in successive rows and in adjacent rows, on two parallel side members for each adjacent row. The groups of two side members of each row are parallel to each other, one group in two being fixed and the other being mobile, as explained above, to facilitate combustion and the advancement of the waste from upstream to downstream.

Comme on peut le voir sur les figures 1a et 1b, les deux blocs extrêmes diffèrent des blocs intermédiaire 1, 12, 13, dans la mesure où le bloc extrême en amont n'est pas assemblé avec un précédent bloc en amont, et où le bloc extrême en aval n'est pas assemblé avec un bloc en aval.As can be seen from figures 1a and 1b , the two end blocks differ from the intermediate blocks 1, 12, 13, insofar as the upstream end block is not assembled with a previous upstream block, and where the downstream end block is not assembled with a block downstream.

De même, les deux supports extrêmes diffèrent des supports intermédiaire 2, 14, 15 dans la mesure où le support extrême en amont n'est pas assemblé avec un précédent support en amont, et où le support extrême en aval n'est pas assemblé avec un support en aval.Similarly, the two end supports differ from the intermediate supports 2, 14, 15 insofar as the upstream end support is not assembled with a previous upstream support, and where the downstream end support is not assembled with downstream support.

Les figures 2 et 3 montrent plus en détail, respectivement vu par le dessus et vu par le dessous, un exemple de bloc selon l'invention, tel que le bloc 1 des figures 1a et 1b.The figures 2 and 3 show in more detail, respectively seen from above and seen from below, an example of a block according to the invention, such as block 1 of figures 1a and 1b .

On retrouve donc le plateau 3, qui présente une face supérieure destinée à recevoir les produits à incinérer en mouvement.We therefore find the plate 3, which has an upper face intended to receive the products to be incinerated in motion.

Des premiers moyens d'assemblage 4 sont prévus. Ces premiers moyens d'assemblage 4 sont configurés pour permettre l'assemblage avec le support correspondant, tel que le support 2 des figures 1, 4 et 5, qui sera décrit plus en détail ci-après.First assembly means 4 are provided. These first assembly means 4 are configured to allow assembly with the corresponding support, such as the support 2 of figures 1 , 4 and 5 , which will be described in more detail below.

Le bloc 1 présente une partie amont 5 et une partie avale 6 par rapport au sens de déplacement des produits à incinérer sur la surface supérieure du plateau 3.Block 1 has an upstream part 5 and a downstream part 6 relative to the direction of movement of the products to be incinerated on the upper surface of the plate 3.

Par ailleurs, le bloc 1 comprend des premiers moyens de centrage et d'alignement 30, 31.Furthermore, the block 1 comprises first centering and alignment means 30, 31.

Ces moyens de centrage et d'alignement 30, 31 sont distincts et indépendants des premiers moyens d'assemblage 4, et configurés pour permettre le centrage et l'alignement du bloc 1 par rapport à deux blocs adjacents respectivement amont 12 et aval 13 montés respectivement sur deux supports amont 14 et aval 15, (tel que représenté sur les figures 1a et 1b). Ce centrage et cet alignement sont obtenus par assemblage direct du bloc 1 respectivement avec les blocs adjacents amont 12 et aval 13.These centering and alignment means 30, 31 are distinct and independent of the first assembly means 4, and configured to allow the centering and alignment of the block 1 with respect to two adjacent blocks respectively upstream 12 and downstream 13 mounted respectively on two supports upstream 14 and downstream 15, (such as represented on the figures 1a and 1b ). This centering and this alignment are obtained by direct assembly of the block 1 respectively with the adjacent upstream 12 and downstream 13 blocks.

Ainsi, le support 2 ne participe pas au centrage et à l'alignement des blocs les uns par rapport aux autres.Thus, the support 2 does not participate in the centering and in the alignment of the blocks with respect to one another.

Comme on peut le voir plus précisément sur l'exemple représenté aux figures 2 et 3, en combinaison avec les figures 1a et 1b, les premiers moyens de centrage et d'alignement 30, 31 sont configurés pour permettre l'assemblage des parties amont 5 et aval 6 du bloc 1, respectivement avec la partie avale du bloc adjacent amont 12 et la partie amont du bloc adjacent aval 13.As can be seen more precisely in the example shown in figures 2 and 3 , in combination with figures 1a and 1b , the first centering and alignment means 30, 31 are configured to allow the assembly of the upstream 5 and downstream 6 parts of the block 1, respectively with the downstream part of the upstream adjacent block 12 and the upstream part of the downstream adjacent block 13 .

Ces premiers moyens de centrage et d'alignement 7 à 11 comprennent au moins un ergot 30 et au moins une fente 31.These first centering and alignment means 7 to 11 comprise at least one lug 30 and at least one slot 31.

Comme on le voit sur la figure 3, l'ergot 30 est formé dans la partie aval 6, sous le plateau 3.As seen on the figure 3 , the lug 30 is formed in the downstream part 6, under the plate 3.

Par ailleurs, comme on le voit sur la figure 2, la fente 31 est formée dans la partie amont 5, au-dessus du plateau 3, et ouverte vers l'amont.Moreover, as seen on the figure 2 , the slot 31 is formed in the upstream part 5, above the plate 3, and open upstream.

L'ergot 30 est destiné à s'engager dans la fente du bloc adjacent aval 13 (voir également figure 1b).The lug 30 is intended to engage in the slot of the adjacent downstream block 13 (see also figure 1b ).

En outre, comme on peut le voir sur la figure 3, le bloc 1 comprend un ou plusieurs retour 9, un seul retour 9 précisément dans cet exemple, et au moins une gorge 10, 11, deux gorges 10 et 11 précisément dans cet exemple.In addition, as can be seen from the figure 3 , the block 1 comprises one or more return 9, a single return 9 precisely in this example, and at least one groove 10, 11, two grooves 10 and 11 precisely in this example.

Comme on le voit sur la figure 3, le retour 9 est formé dans la partie aval 6, sous le plateau 3, et dirigé vers l'amont. L'ergot 30 s'étend depuis ce retour 9 dans une direction sensiblement perpendiculaire au plateau 3. Dans l'exemple de la figure 3, le retour 9 s'étend sous le plateau 3 sensiblement sur toute la dimension transverse du bloc 1. Une liaison de renfort 33 est prévue entre le retour 9 et la face inférieure du plateau 3, au niveau de l'ergot 30.As seen on the figure 3 , the return 9 is formed in the downstream part 6, under the plate 3, and directed upstream. The lug 30 extends from this return 9 in a direction substantially perpendicular to the plate 3. In the example of figure 3 , the return 9 extends under the plate 3 substantially over the entire transverse dimension of the block 1. A reinforcing connection 33 is provided between the return 9 and the underside of the plate 3, at the level of the lug 30.

Comme on le voit sur la figure 2, les gorges 10 et 11 sont formées dans des surplombs 7 et 8 au-dessus du plateau 3 et ouvertes vers l'aval.As seen on the figure 2 , the grooves 10 and 11 are formed in overhangs 7 and 8 above the plate 3 and open downstream.

Le retour 9 du bloc 1 est destiné à s'engager dans la gorge du bloc adjacent aval 13 (voir figure 1a) par glissement de l'aval vers l'amont.The return 9 of block 1 is intended to engage in the groove of the adjacent downstream block 13 (see figure 1a ) by sliding from downstream to upstream.

Le retour 9 s'étend transversalement sous le plateau 3, sur une distance et à une position telle qu'il puisse coopérer avec les gorges du bloc adjacent aval 13. De préférence, le retour 9 s'étend sous le plateau 3 sensiblement sur toute la dimension transverse du bloc 1 tel que représenté sur la figure 3. Du point de vue de la fabrication en fonderie, il est en effet plus facile et moins coûteux de créer ce retour 9 sur toute la dimension transverse du bloc 1. Toutefois, ce retour 9 pourrait être partiel transversalement, ou être formé de plusieurs retours partiels, pour autant qu'il/ils soient de dimension(s) et en position(s) adaptées par rapport aux gorges 10 et 11.The return 9 extends transversely under the plate 3, over a distance and at a position such that it can cooperate with the grooves of the adjacent downstream block 13. Preferably, the return 9 extends under the plate 3 substantially over the entire length. the transverse dimension of block 1 as shown in figure 3 . From the point of view of manufacturing in the foundry, it is in fact easier and less expensive to create this return 9 over the entire transverse dimension of the block 1. However, this return 9 could be partial transversely, or be formed from several partial returns. , as long as it / they are of suitable size (s) and position (s) in relation to the grooves 10 and 11.

Les deux gorges 10 et 11 sont quant à elles réparties dans la partie amont 5 le long de la dimension transverse du bloc 1. Une unique gorge, s'étendant en partie ou en totalité transversalement pourrait être utilisée. Toutefois, la position de la ou des gorges 10 et 11 est conditionnée par la position des premiers moyens d'assemblage 4 comme on le verra ci-après. Dans tous les cas, la ou les gorges 10, 11 doivent être de dimension(s) et en position(s) adaptées par rapport au(x) retour(s) 9 dans la partie aval 6, pour l'assemblage amont/aval et aval/amont des blocs 1, 12, 13 deux à deux (voir figure 1a).The two grooves 10 and 11 are for their part distributed in the upstream part 5 along the transverse dimension of the block 1. A single groove, extending partially or entirely transversely could be used. However, the position of the groove or grooves 10 and 11 is conditioned by the position of the first assembly means 4 as will be seen below. In all cases, the groove (s) 10, 11 must be of suitable size (s) and position (s) with respect to the return (s) 9 in the downstream part 6, for the upstream / downstream assembly and downstream / upstream of blocks 1, 12, 13 two by two (see figure 1a ).

Comme on peut le voir sur l'exemple de la figure 2, la fente 31 est formée dans la partie amont 5, entre les deux gorges 10 et 11. Comme on peut le voir par ailleurs sur la figure 3, sous cette fente 31, au niveau de la face inférieure du plateau 3, est prévue une liaison de renfort 32 entre le plateau 3 est la partie amont 5 du bloc 1.As can be seen from the example of the figure 2 , the slot 31 is formed in the upstream part 5, between the two grooves 10 and 11. As can be seen elsewhere on the figure 3 , under this slot 31, at the level of the lower face of the plate 3, there is provided a reinforcing link 32 between the plate 3 and the upstream part 5 of the block 1.

Également comme on peut le voir sur l'exemple des figures 2 et 3, les premiers moyens d'assemblage 4 comprennent au moins un point d'assemblage 4 formé dans la partie amont 5 entre les deux gorges 10, 11, de préférence en position centrale sur la dimension transverse. Dans l'exemple représenté sur les figures, il est question d'un unique point d'assemblage 4. Cependant, l'on pourrait tout aussi bien prévoir plusieurs points d'assemblage répartis sur la dimension transverse par exemple.Also as can be seen from the example of figures 2 and 3 , the first assembly means 4 comprise at least one assembly point 4 formed in the upstream part 5 between the two grooves 10, 11, preferably in a central position on the transverse dimension. In the example shown in the figures, there is a question of a single assembly point 4. However, one could just as easily provide several assembly points distributed over the transverse dimension for example.

Ce ou ces points d'assemblage 4 peuvent être un trou 4 qui coopère, par boulonnage, avec les moyens d'assemblage correspondants du support 2 qui sera décrit plus en détail ci-après, tel qu'un autre trou dans ce support 2.This or these assembly points 4 may be a hole 4 which cooperates, by bolting, with the corresponding assembly means of the support 2 which will be described in more detail below, such as another hole in this support 2.

Le plateau 3 comprend de préférence des ouvertures 17 de passage d'air. Ces ouvertures 17 sont réparties depuis la partie amont 5 jusqu'à la partie aval 6. Chaque ouverture 17 est pourvue sur son pourtour d'une bordure 18 de protection, destinées à empêcher une matière liquide en écoulement sur le plateau 3 de pénétrer dans les ouvertures 17 et de boucher celles-ci.The plate 3 preferably comprises openings 17 for the passage of air. These openings 17 are distributed from the upstream part 5 to the downstream part 6. Each opening 17 is provided on its periphery with a protective edge 18, intended to prevent a liquid material flowing on the plate 3 from entering the areas. openings 17 and plug them.

Un des avantages des moyens de centrage et d'alignement 30, 31 et de la coopération entre le retour 9 et les gorges 10 et 11, tels que décrits ci-dessus, et qu'ils ne nécessitent pas de dégagement important sur la surface supérieure du plateau 3 pour l'insertion par glissement du retour 9 dans les gorges 10, 11. Aussi, les ouvertures 17 avec leurs bordures 18 peuvent être formées depuis la partie amont, réparties sur la quasi-totalité de la surface supérieure du plateau sans gêner le centrage par les premiers moyens de centrage et d'alignement 30, 31 et la coopération entre le retour 9 et les gorges 10, 11.One of the advantages of the centering and alignment means 30, 31 and of the cooperation between the return 9 and the grooves 10 and 11, as described above, and that they do not require significant clearance on the upper surface of the plate 3 for the insertion by sliding of the return 9 in the grooves 10, 11. Also, the openings 17 with their edges 18 can be formed from the upstream part, distributed over almost the entire upper surface of the plate without hindering the centering by the first centering and alignment means 30, 31 and the cooperation between the return 9 and the grooves 10, 11.

Les figures 4 et 5 montrent plus en détail, respectivement vu par le dessus et vu par le dessous, un exemple de support selon l'invention, tel que le support 2 des figures 1a et 1b.The figures 4 and 5 show in more detail, respectively seen from above and seen from below, an example of a support according to the invention, such as support 2 of the figures 1a and 1b .

Le support 2 comprend ainsi des deuxièmes moyens d'assemblage 19, 20 configurés pour permettre l'assemblage avec le ou les longerons 16 de la grille.The support 2 thus comprises second assembly means 19, 20 configured to allow assembly with the side member (s) 16 of the grid.

Par ailleurs, le support 2 présente une partie amont 22 et une partie avale 23 par rapport au sens de déplacement d'un produit à incinérer sur la surface supérieure du plateau 3 du bloc 1 décrit précédemment.Furthermore, the support 2 has an upstream part 22 and a downstream part 23 with respect to the direction of movement of a product to be incinerated on the upper surface of the plate 3 of the block 1 described above.

Ce support 2 comprend en outre des deuxièmes moyens de centrage et d'alignement 24, 25. Ces derniers sont configurés pour permettre le centrage et l'alignement du support 2 par rapport à deux supports adjacents respectivement amont 14 et aval 15 portant respectivement deux blocs amonts 12 et aval 13 (voir figures 1a et 1b).This support 2 further comprises second centering and alignment means 24, 25. The latter are configured to allow the centering and alignment of the support 2 with respect to two adjacent supports respectively upstream 14 and downstream 15 respectively carrying two blocks. upstream 12 and downstream 13 (see figures 1a and 1b ).

Par ailleurs, des troisièmes moyens d'assemblage 21 sont prévus. Ces derniers sont configurés pour permettre l'assemblage avec le bloc 1. Cet assemblage est obtenu par coopération de ces troisièmes moyens d'assemblage 21 avec les premiers moyens d'assemblage 4 du bloc 1, sans que ces troisièmes moyens d'assemblage 21 ne participent au centrage et à l'alignement du bloc 1 par rapport aux blocs adjacent amont 12 et aval 13 montés respectivement sur les deux supports amont 14 et aval 15.Furthermore, third assembly means 21 are provided. The latter are configured to allow assembly with the block 1. This assembly is obtained by cooperation of these third assembly means 21 with the first assembly means 4 of the block 1, without these third assembly means 21 not participate in the centering and alignment of block 1 by compared to the adjacent upstream 12 and downstream 13 blocks mounted respectively on the two upstream 14 and downstream 15 supports.

Dans l'exemple des figures 4 et 5, les deuxièmes moyens de centrage et d'alignement 24, 25 sont configurés pour permettre l'assemblage des parties amont 22 et aval 23 du support 2 respectivement avec la partie avale du support adjacent amont 14 et la partie amont du support adjacent aval 15 (voir figures 1a et 1b).In the example of figures 4 and 5 , the second centering and alignment means 24, 25 are configured to allow the assembly of the upstream 22 and downstream 23 parts of the support 2 respectively with the downstream part of the upstream adjacent support 14 and the upstream part of the downstream adjacent support 15 ( see figures 1a and 1b ).

Ces deuxièmes moyens de centrage et d'alignement 24, 25 comprennent un logement 25 et nez 24.These second centering and alignment means 24, 25 comprise a housing 25 and nose 24.

Le logement 25 est formé dans la partie amont 22. De préférence ce logement 25 est surmonté d'une surépaisseur de renfort 26.The housing 25 is formed in the upstream part 22. Preferably, this housing 25 is surmounted by an extra thickness of reinforcement 26.

Le nez 24 est quant à lui formé dans la partie aval 23 et présente une forme configurée pour pouvoir être logée dans le logement de la partie amont du support adjacent aval 15.The nose 24 is for its part formed in the downstream part 23 and has a shape configured to be able to be housed in the housing of the upstream part of the adjacent downstream support 15.

Dans l'exemple des figures 4 et 5, les parties amont et aval 22, 23 du support (2) s'étendent transversalement par rapport à la direction d'avancée des déchets sur les plateaux respectifs des blocs montés sur la grille. Le support 2 comprend alors deux extensions longitudinales 27, 28 qui partent de la partie amont 22 et se rejoignent en la partie aval 23. Les troisièmes moyens d'assemblage 21, de préférence comprenant au moins un point d'assemblage 21, sont supportés par une partie intermédiaire 29 qui s'étend également transversalement et qui est disposée entre les parties amont et aval 22, 23, surélevé par rapport à ces dernières. Dans l'exemple représenté sur les figures, il est question d'un unique point d'assemblage 21. Cependant, l'on pourrait tout aussi bien prévoir plusieurs points d'assemblage.In the example of figures 4 and 5 , the upstream and downstream parts 22, 23 of the support (2) extend transversely with respect to the direction of advance of the waste on the respective trays of the blocks mounted on the grid. The support 2 then comprises two longitudinal extensions 27, 28 which start from the upstream part 22 and meet in the downstream part 23. The third assembly means 21, preferably comprising at least one assembly point 21, are supported by an intermediate part 29 which also extends transversely and which is arranged between the upstream and downstream parts 22, 23, raised relative to the latter. In the example shown in the figures, there is a question of a single assembly point 21. However, one could just as easily provide several assembly points.

Ainsi, grâce à des tolérances de fabrication adaptées, le bloc de l'invention d'une part, et le support de l'invention d'autre part, permettent un centrage et un auto-alignement des blocs les uns par rapport aux autres d'une part, et des supports les uns par rapport aux autres d'autre part.Thus, thanks to suitable manufacturing tolerances, the block of the invention on the one hand, and the support of the invention on the other hand, allow centering and self-alignment of the blocks with respect to each other. 'on the one hand, and supports relative to each other on the other hand.

En évitant que les supports participent au centrage et à l'alignement des blocs, on simplifie la fabrication et l'assemblage avec un minimum de jeu, donc un minimum de passages d'air non contrôlés, ce qui permet d'obtenir une combustion optimisée. En outre, le jeu restant, indispensable à l'assemblage, est stable et homogène tout le long des rangées de blocs, ce qui facilite le travail de l'opérateur en termes de réglage optimum de la combustion.By preventing the supports from participating in the centering and alignment of the blocks, manufacturing and assembly are simplified with a minimum of play, therefore a minimum of uncontrolled air passages, which makes it possible to obtain optimized combustion. . In addition, the remaining clearance, essential for assembly, is stable and homogeneous all along the rows of blocks, which facilitates the operator's work in terms of optimum combustion adjustment.

Par ailleurs, les supports, solidaires des longerons sans participer au centrage et à l'alignement des blocs, deviennent des éléments de montage intermédiaire, et sont considérés comme des pièces de fabrication et non des pièces d'usure. Seuls les blocs sont des pièces d'usure, qui peuvent subir une érosion due aux frictions engendrées lors des mouvements de certains des longerons, à l'échauffement thermique et au passage des déchets. Dans le cadre de la maintenance d'une telle grille à gradins, le cycle de remplacement des supports peut être beaucoup plus long que celui des blocs, ce qui réduit le coût de cette maintenance.Furthermore, the supports, integral with the side members without participating in the centering and alignment of the blocks, become intermediate mounting elements, and are considered as work pieces and not wear parts. Only the blocks are wearing parts, which can undergo erosion due to the friction generated during the movements of some of the side members, to thermal heating and the passage of waste. In the context of the maintenance of such a stepped grid, the support replacement cycle can be much longer than that of the blocks, which reduces the cost of this maintenance.

La demanderesse a ainsi pu constater qu'un four équipé d'une grille à gradins selon l'invention permettait d'obtenir une augmentation de la capacité nominale du four pouvant être supérieure à 15 %, en termes de temps nécessaire à l'incinération d'un volume donné de déchets, ou en termes de volume de déchets pouvant être incinéré en un temps donné.The Applicant has thus been able to observe that an oven equipped with a stepped grid according to the invention made it possible to obtain an increase in the nominal capacity of the oven which may be greater than 15%, in terms of the time required for the incineration of '' a given volume of waste, or in terms of the volume of waste that can be incinerated in a given time.

On rappelle que la présente description, illustrée par les figures 1 à 5, est donnée à titre d'exemple et n'est pas limitative de l'invention. Par exemple, les nombres précis de gorges 10, 11, de fentes 31 et de points d'assemblage 4 et 21 présents dans les figures sont donnés à titre d'exemple et ne sont donc pas limitatifs de l'invention.It is recalled that the present description, illustrated by the figures 1 to 5 , is given by way of example and is not limiting of the invention. For example, the precise numbers of grooves 10, 11, slots 31 and assembly points 4 and 21 present in the figures are given by way of example and are therefore not limiting of the invention.

Claims (15)

Bloc (1) de grille à gradins pour foyer de four d'incinérateur, destiné à être fixé sur un ou plusieurs longerons (16) parallèles de la grille par l'intermédiaire d'un support (2), le bloc (1) comprenant un plateau (3) présentant une face supérieure destinée à recevoir un produit à incinérer en mouvement, et des premiers moyens d'assemblage (4) configurés pour permettre l'assemblage avec le support (2), le bloc (1) présentant une partie amont (5) et une partie avale (6) par rapport au sens de déplacement d'un produit à incinérer sur la surface supérieure du plateau (3), ledit bloc (1) comprenant des premiers moyens de centrage et d'alignement (30, 31) distincts et indépendants des premiers moyens d'assemblage (4), configurés pour permettre le centrage et l'alignement des parties amont (5) et aval (6) du bloc (1) respectivement avec la partie avale d'un bloc adjacent amont (12) et la partie amont d'un bloc adjacent aval (13), lesdits blocs adjacents amont (12) et aval (13) étant montés respectivement sur deux supports amont (14) et aval (15), par assemblage direct du bloc (1) respectivement avec les blocs adjacent amont (12) et aval (13), les premiers moyens de centrage et d'alignement (30, 31) comprenant au moins un ergot (30) formé dans la partie aval (6), sous le plateau (3), et au moins une fente (31) formée dans la partie amont (5), au-dessus du plateau (3) et ouverte vers l'amont, l'ergot (30) étant destiné à s'engager dans la fente du bloc adjacent aval.Block (1) of a stepped grid for an incinerator furnace hearth, intended to be fixed to one or more longitudinal members (16) of the grid by means of a support (2), the block (1) comprising a plate (3) having an upper face intended to receive a product to be incinerated in motion, and first assembly means (4) configured to allow assembly with the support (2), the block (1) having a part upstream (5) and a downstream part (6) relative to the direction of movement of a product to be incinerated on the upper surface of the plate (3), said block (1) comprising first centering and alignment means (30 , 31) separate and independent of the first assembly means (4), configured to allow the centering and alignment of the upstream (5) and downstream (6) parts of the block (1) respectively with the downstream part of a block adjacent upstream (12) and the upstream part of an adjacent downstream block (13), said upstream (12) and downstream (13) adjacent blocks being mounted respectively on two upstream (14) and downstream (15) supports, by direct assembly of the block (1) respectively with the adjacent upstream (12) and downstream (13) blocks, the first centering and alignment means (30, 31 ) comprising at least one lug (30) formed in the downstream part (6), under the plate (3), and at least one slot (31) formed in the upstream part (5), above the plate (3) and open upstream, the lug (30) being intended to engage in the slot of the adjacent downstream block. Bloc (1) selon la revendication 1, caractérisé en ce qu'il comprend un ou plusieurs retours (9) formés dans la partie aval (6), sous le plateau (3), et dirigés vers l'amont, et en ce que l'ergot (30) s'étend depuis l'un de ces retours (9) dans une direction sensiblement perpendiculaire au plateau (3).Block (1) according to Claim 1, characterized in that it comprises one or more returns (9) formed in the downstream part (6), under the plate (3), and directed upstream, and in that the lug (30) extends from one of these returns (9) in a direction substantially perpendicular to the plate (3). Bloc (1) selon la revendication 2, caractérisé en ce qu'il comprend un unique retour (9) s'étendant sous le plateau (3) sensiblement sur toute la dimension transverse du bloc (1).Block (1) according to Claim 2, characterized in that it comprises a single return (9) extending under the plate (3) substantially over the entire transverse dimension of the block (1). Bloc (1) selon l'une quelconque des revendications 2 et 3, caractérisé en ce qu'il comprend au moins une gorge (10, 11) formée dans la partie amont (5), au-dessus du plateau (3) et ouverte vers l'aval, le ou les retours (9) étant destinés à s'engager dans la gorge du bloc adjacent aval (13) par glissement de l'aval vers l'amont.Block (1) according to any one of Claims 2 and 3, characterized in that it comprises at least one groove (10, 11) formed in the upstream part (5), above the plate (3) and open downstream, the return (s) (9) being intended to engage in the groove of the adjacent downstream block (13) by sliding from downstream to upstream. Bloc (1) selon la revendication 4, caractérisé en ce qu'il comprend au moins deux gorges (10, 11) formées dans la partie amont, au-dessus du plateau (3) et orientées vers l'aval, réparties le long de la dimension transverse du bloc (1), le retour (9) étant destinés à s'engager dans les gorges du bloc adjacent aval (13) par glissement de l'aval vers l'amont.Block (1) according to claim 4, characterized in that it comprises at least two grooves (10, 11) formed in the upstream part, above the plate (3) and oriented downstream, distributed along the transverse dimension of the block (1), the return (9) being intended to engage in the grooves of the adjacent downstream block (13) by sliding from downstream to upstream. Bloc (1) selon la revendication 5, caractérisé en ce que la fente (31) est formé dans la partie amont (5), entre les deux gorges (10, 11).Block (1) according to Claim 5, characterized in that the slot (31) is formed in the upstream part (5), between the two grooves (10, 11). Bloc (1) selon l'une quelconque des revendications 5 et 6, caractérisé en ce que les premiers moyens d'assemblage (4) comprennent au moins un point d'assemblage (4) formé dans la partie amont (5), entre les deux gorges (10, 11).Block (1) according to any one of claims 5 and 6, characterized in that the first assembly means (4) comprise at least one assembly point (4) formed in the upstream part (5), between the two grooves (10, 11). Bloc (1) selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le plateau (3) comprend des ouvertures (17) de passage d'air réparties depuis la partie amont (5) jusqu'à la partie aval (6), chacune étant pourvues sur leur pourtour de bordures (18) de protection destinées à permettre l'écoulement de matière liquide sur le plateau (3) sans risque de pénétration de cette matière liquide dans les ouvertures (17).Block (1) according to any one of claims 1 to 7, characterized in that the plate (3) comprises air passage openings (17) distributed from the upstream part (5) to the downstream part ( 6), each being provided on their periphery with protective edges (18) intended to allow the flow of liquid material on the plate (3) without the risk of this liquid material entering the openings (17). Support (2) de bloc de grille à gradins pour foyer de four d'incinérateur, destiné à la fixation d'un bloc (1) selon l'une quelconque des revendications précédentes, sur un ou plusieurs des longerons (16) parallèles de la grille, le support (2) comprenant des deuxièmes moyens d'assemblage (19, 20) configurés pour permettre l'assemblage avec le ou les longerons (16), le support (2) présentant une partie amont (22) et une partie avale (23) par rapport au sens de déplacement d'un produit à incinérer sur la surface supérieure du plateau (3) du bloc (1), le support (2) comprenant en outre des deuxièmes moyens de centrage et d'alignement (24, 25) configurés pour permettre le centrage et l'alignement du support (2) par rapport à deux supports adjacents respectivement amont (14) et aval (15) portant respectivement deux blocs amonts (12) et aval (13),
caractérisé en ce qu'il comprend des troisièmes moyens d'assemblage (21) configurés pour permettre l'assemblage avec le bloc (1) par coopération avec les premiers moyens d'assemblage (4) sans participer au centrage et à l'alignement du bloc (1) par rapport aux blocs adjacent amont (12) et aval (13) montés respectivement sur les deux supports amont (14) et aval (15).Support (2) for a stepped grate block for an incinerator furnace hearth, intended for fixing a block (1) according to any one of the preceding claims, on one or more of the parallel longitudinal members (16) of the grid, the support (2) comprising second assembly means (19, 20) configured to allow assembly with the side member (s) (16), the support (2) having an upstream part (22) and a downstream part (23) with respect to the direction of movement of a product to be incinerated on the upper surface of the plate (3) of the block (1), the support (2) further comprising second centering and alignment means (24, 25) configured to allow centering and alignment of the support (2) with respect to two adjacent supports respectively upstream (14) and downstream (15) respectively carrying two upstream (12) and downstream (13) blocks,
characterized in that it comprises third assembly means (21) configured to allow assembly with the block (1) by cooperation with the first assembly means (4) without participating in the centering and alignment of the block (1) with respect to the adjacent upstream (12) and downstream (13) blocks respectively mounted on the two upstream (14) and downstream (15) supports. Support (2) selon la revendication 9, caractérisé en ce que les deuxièmes moyens de centrage et d'alignement (24, 25) sont configurés pour permettre l'assemblage des parties amont (22) et aval (23) du support (2) respectivement avec la partie avale du support adjacent amont (14) et la partie amont du support adjacent aval (15).Support (2) according to Claim 9, characterized in that the second centering and alignment means (24, 25) are configured to allow the assembly of the upstream (22) and downstream (23) parts of the support (2) respectively with the downstream part of the upstream adjacent support (14) and the upstream part of the downstream adjacent support (15). Support (2) selon l'une quelconque des revendications 9 et 10, caractérisé en ce que les deuxièmes moyens de centrage et d'alignement (24, 25) comprennent un logement (25) formé dans la partie amont (22) du support (2), et un nez (24) formé dans la partie aval (23) du support (2) et présentant une forme configurée pour pouvoir être logée dans le logement de la partie amont du support adjacent aval (15).Support (2) according to any one of claims 9 and 10, characterized in that the second centering and alignment means (24, 25) comprise a housing (25) formed in the upstream part (22) of the support ( 2), and a nose (24) formed in the downstream part (23) of the support (2) and having a shape configured to be able to be housed in the housing of the upstream part of the downstream adjacent support (15). Support (2) selon la revendication 11, caractérisé en ce que le logement (25) est surmonté d'une surépaisseur de renfort (26).Support (2) according to Claim 11, characterized in that the housing (25) is surmounted by a reinforcing extra thickness (26). Support (2) selon l'une quelconque des revendications 11 à 14, caractérisé en ce que les parties amont et aval (22, 23) du support (2) s'étendent transversalement, le support (2) comprenant deux extensions longitudinales (27, 28) qui partent de ladite partie amont (22) et se rejoignent en ladite partie aval (23), les troisièmes moyens d'assemblage (21) comprenant au moins un point d'assemblage (21) supporté par une partie intermédiaire (29) s'étendant transversalement et disposée entre les parties amont et aval (22, 23).Support (2) according to any one of claims 11 to 14, characterized in that the upstream and downstream parts (22, 23) of the support (2) extend transversely, the support (2) comprising two longitudinal extensions (27 , 28) which start from said upstream part (22) and meet in said downstream part (23), the third assembly means (21) comprising at least one assembly point (21) supported by an intermediate part (29) extending transversely and arranged between the upstream and downstream parts (22, 23). Grille à gradins pour foyer de four d'incinérateur comprenant un ou plusieurs longerons (16) parallèles, caractérisée en ce qu'elle comprend au moins un bloc (1, 12, 13) selon l'une quelconque des revendications 1 à 8 monté sur au moins un des logerons (16) par l'intermédiaire d'un support (2, 14, 15) selon l'une quelconque des revendications 9 à 13.Stepped grate for an incinerator furnace hearth comprising one or more parallel longitudinal members (16), characterized in that it comprises at least one block (1, 12, 13) according to any one of claims 1 to 8 mounted on at least one of the housing (16) via a support (2, 14, 15) according to any one of claims 9 to 13. Grille selon la revendication 16, caractérisée en ce qu'elle comprend au moins trois blocs (1, 12, 13) selon l'une quelconque des revendications 1 à 8 assemblés deux à deux de manière adjacente de l'amont vers l'aval et montés sur au moins un des logerons (16) par l'intermédiaire respectivement de trois supports (2, 14,15) selon l'une quelconque des revendications 9 à 13 assemblés deux à deux de manière adjacente de l'amont vers l'aval.Grid according to claim 16, characterized in that it comprises at least three blocks (1, 12, 13) according to any one of claims 1 to 8 assembled two by two adjacent from upstream to downstream and mounted on at least one of the housings (16) by means of three supports (2, 14,15) according to any one of claims 9 to 13, respectively, assembled in pairs adjacent to upstream to downstream .
EP20190295.4A 2019-08-13 2020-08-10 Grid unit with tier for furnace grate of an incinerator, and corresponding support Withdrawn EP3779278A1 (en)

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FR1909183A FR3099949B1 (en) 2019-08-13 2019-08-13 Stepped grate block for incinerator furnace hearth, and corresponding support

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55100843U (en) * 1978-12-29 1980-07-14
US4563959A (en) * 1984-01-09 1986-01-14 Kabushiki Kaisha Takuma Step type stoker with oscillation mechanism
EP0811803A2 (en) * 1996-06-04 1997-12-10 MARTIN GmbH für Umwelt- und Energietechnik Grate element and grate with liquid-cooling
EP1036986A1 (en) 1999-03-17 2000-09-20 Ansaldo Voelund A/S Stepped grate for a waste incineration plant
WO2006119777A1 (en) 2005-05-13 2006-11-16 Babcock & Wilcox Vølund Aps A stepped grate for a waste incineration plant

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55100843U (en) * 1978-12-29 1980-07-14
US4563959A (en) * 1984-01-09 1986-01-14 Kabushiki Kaisha Takuma Step type stoker with oscillation mechanism
EP0811803A2 (en) * 1996-06-04 1997-12-10 MARTIN GmbH für Umwelt- und Energietechnik Grate element and grate with liquid-cooling
EP1036986A1 (en) 1999-03-17 2000-09-20 Ansaldo Voelund A/S Stepped grate for a waste incineration plant
WO2006119777A1 (en) 2005-05-13 2006-11-16 Babcock & Wilcox Vølund Aps A stepped grate for a waste incineration plant

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FR3099949A1 (en) 2021-02-19

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