EP2577203A1 - Grid plate - Google Patents

Grid plate

Info

Publication number
EP2577203A1
EP2577203A1 EP11718383.0A EP11718383A EP2577203A1 EP 2577203 A1 EP2577203 A1 EP 2577203A1 EP 11718383 A EP11718383 A EP 11718383A EP 2577203 A1 EP2577203 A1 EP 2577203A1
Authority
EP
European Patent Office
Prior art keywords
cavities
plate
grid plate
slots
slope
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.)
Granted
Application number
EP11718383.0A
Other languages
German (de)
French (fr)
Other versions
EP2577203B1 (en
Inventor
Regnier Pirard
Christophe Vielvoye
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Magotteaux International SA
Original Assignee
Magotteaux International SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Magotteaux International SA filed Critical Magotteaux International SA
Priority to PL11718383T priority Critical patent/PL2577203T3/en
Publication of EP2577203A1 publication Critical patent/EP2577203A1/en
Application granted granted Critical
Publication of EP2577203B1 publication Critical patent/EP2577203B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F27D15/0206—Cooling with means to convey the charge
    • F27D15/0213—Cooling with means to convey the charge comprising a cooling grate
    • F27D15/022—Cooling with means to convey the charge comprising a cooling grate grate plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D5/00—Supports, screens, or the like for the charge within the furnace
    • F27D5/0006—Composite supporting structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F27D15/0206—Cooling with means to convey the charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D5/00—Supports, screens, or the like for the charge within the furnace
    • F27D2005/0081—Details

Definitions

  • the present invention relates to a constituent element of a grate cooler and more particularly to a grate plate for efficiently and economically conveying and cooling a bulk material coming out of a furnace at a temperature of 30.degree. high temperature.
  • the grilled cooler is well equipped, for example, for cooling the cement clinker after baking.
  • the main functions of this equipment cover cooling, heat recovery and transport of the clinker.
  • the cooler generally comprises a bed of grids superimposed at an angle to the horizontal.
  • US4600380 discloses a box-shaped grid plate pierced with very thin slots through which is injected the cooling air. This document proposes to inject the air at a precise angle and plans to profile slots in a curved manner, so that the cooled material can not flow through the slots until they can be clogged, in case of unforeseen interruption of the cooling air injection.
  • the orifice of these slots is narrowed over the entire length of the slot, which causes a significant loss of load.
  • no retention pocket is provided and the hot material is in direct contact with the entire surface of the box, which generally leads to premature wear.
  • US5282741 discloses a grid plate having pockets in the part subjected to the flow of material to be cooled.
  • the Flat bottom pockets also have side slots for air injection, but the orientation of the pockets is parallel to the flow of material, which does not effectively affect the flow.
  • EP1060356 discloses a grid plate comprising pockets of a particular shape with an inclined bottom and cooling air passage channels in a particular configuration. These pockets do not have a triangular section and have a rim at the connection with the surface of the grid.
  • the grid plate disclosed by this document also has no upward end with a slope opposite that of the pocket.
  • DE 195 37 904 A1 discloses a grid plate without pockets.
  • the presence of pockets is however necessary to the cooling of the grid because the matter trapped in the pockets, and already cooled, protects the grid against overheating.
  • the angles specified in this document relate to the cooling gas injection channels on the grid surface. These angles are not related to any upward end with reverse slope.
  • the grid plate according to the present invention attempts to overcome the disadvantages of the grid plates of the state of the art.
  • the invention relates more particularly to a grid plate of a particularly powerful design allowing a steady rate of progression of the bed of material associated with efficient cooling by injecting efficient cooling air into the system supporting the bed of material, thus allowing a control of the inevitable wear of these supports.
  • the present invention discloses a grid plate for transporting and cooling very hot materials leaving an oven, said plate having cavities of rectangular shape, the largest dimension being perpendicular to the direction of advancement of the matter, the section of these cavities being triangular with a fin-shaped bottom terminating in a upward end with a reverse slope, the slope of the cavities being between 10 and 45 °, preferably between 20 and 30 ° with respect to the horizontal, and the slope inverse ( ⁇ ) of the ascending end being at an angle equal to or less than 6 ° to the angle (a) of the slope of the cavities.
  • the latter comprises at least one or an appropriate combination of the following characteristics:
  • each cavity has one or more cooling air injection slots opening into the lowest part of each of the cavities, these slots being oriented so as to inject the air parallel to the bottom of the cavities, these slots being performed by means of a material allowance disposed on the lower surface of the elements constituting the gate plate so as to locally narrow the space between two successive fins;
  • the ascending end of the fin has a length of at least 20 mm;
  • the gate plate also has on the front face one or more air injection slots;
  • the slots of the front face of the grid plate have the same length as the slots opening into the bottom of the cavities;
  • the slots of the front face of the grid plate are arranged at a distance of between 5 and 40 millimeters from the plane of the upper face of the grid plate.
  • the present invention also discloses a gate cooler having a gate plate according to any one of the preceding features.
  • Figure 1 shows a three-dimensional view of the grid plate according to the invention.
  • Figure 2 shows a grid plate assembly of a transport chain.
  • Figure 3 shows a sectional view of the grid plate according to the invention.
  • FIG. 4 shows in detail a sectional view of the grid plate according to the invention with the angles alpha and beta.
  • FIG. 5 represents a sectional view of a plurality of grid plates arranged on a transport chain of a gate cooler.
  • the present invention relates to a constituent element of a cooling system for efficiently and economically cool bulk material initially at an elevated temperature, generally above 1000 ° C.
  • a cooling system provides for progress a bed of very hot material at a steady speed on airy grid plates while blowing cold air to cool this material.
  • the bottom wing-shaped (3) is inclined according to a rising slope in the direction of the progression of the material to be cooled, the section of the cavity (2) being generally a triangle, which means that each cavity (2) has an intersection in a straight line with the plane of the grid and therefore a smooth transition in the direction of advancement of the material.
  • the choice of the number of cavities and the slope angle of the bottom of the pockets is conditioned by the desired flow rate.
  • the cooling air is injected through the space between two successive fins in the bottom of the cavities, this space being narrowed locally just before opening into the bottom of each cavity with a concentrated material overprint exclusively on the underside of the upper fin and so that the air is injected by one or more slots.
  • This section reduction is performed on a very limited portion of the passage, so as to reduce the pressure drop.
  • the passage When it opens into the cavity, the passage has the appearance of a slot of 2 to 10 millimeters in width and 20 to 280 millimeters in length.
  • each cavity-bottom fin is inclined so that it forms with the horizontal an angle ⁇ equal to or less than 6 ° maximum to that at the bottom of the cavity but with a slope inverse, that is to say, descending in the direction of the progression of the material to be cooled r.
  • This portion with inverse slope must have a minimum length sufficient to effectively interrupt the possible flow of material through the air injection passage. This length is generally greater than 1 5 mm, preferably greater than 20 mm.
  • the g ril does not replace more correctly its function and must be disassembled, which requires the complete stop of the installation, which is extremely penalizing since it supposes to leave the time to the complete installation to cool sufficiently to allow an intervention.
  • it is necessary to combat the phenomenon of abrasion by strictly limiting the surfaces of the grid plate which are directly exposed to the hot material and fight the oxidation phenomenon by ensuring that these surfaces are effectively cooled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
  • Incineration Of Waste (AREA)

Abstract

The present invention relates to a grid plate for the transporting and cooling of very hot materials leaving a furnace, said plate having cavities of rectangular shape, the largest dimension being perpendicular to the direction of advance of the materials, the cross section of these cavities being triangular with a fin-shaped bottom terminating in a turned-up end of reverse slope, the slope (α) of the cavities being between 10° and 45°, preferably between 20° and 30°, to the horizontal and the reverse slope (β) of the turned-up end making an angle equal to or up to 6° less than the angle of the slope of the cavities. The flow of material under gravity through the air injection slits is interrupted. Any contact of the material with the framework and with the mechanism of the equipment is avoided.

Description

Plaque de grille  Grid plate
Objet de l'invention Object of the invention
[0001 ] La présente invention se rapporte à un élément constitutif d'un refroidisseu r à grille et plus particu lièrement d ' une plaque de grille destinée à transporter et à refroidi r efficacement et économiquement une matière en vrac sortant d 'un four à une température élevée.  The present invention relates to a constituent element of a grate cooler and more particularly to a grate plate for efficiently and economically conveying and cooling a bulk material coming out of a furnace at a temperature of 30.degree. high temperature.
Etat de la technique State of the art
[0002] Le refroidisseu r à gri lle est u n équi pement bien con n u par exemple pour le refroidissement du clinker de ciment après la cuisson. Les fonctions pri nci pa les de cet équi pement couvrent le refroidissement, la récu pération calorifique et le transport du clinker. Le refroidisseur comporte généralement un lit de grilles superposées avec un angle par rapport à l'horizontale.  The grilled cooler is well equipped, for example, for cooling the cement clinker after baking. The main functions of this equipment cover cooling, heat recovery and transport of the clinker. The cooler generally comprises a bed of grids superimposed at an angle to the horizontal.
[0003] Le document EP0120227 (Orren) explique les fondements de la technologie de refroidissement pa r u n système de gri lles osci lla ntes qu i font progresser la matière. Mais ce document ne prévoit aucun système pour combattre l'usure excessive des plaques et ne divulgue aucun détail de construction permettant d'assu rer un refroidissement efficace des plaques pou r li miter leu r usu re. La conception divulguée dans ce document prévoit uniquement un certain nombre d'orifices devant permettre l'injection de l'air. [0003] Document EP0120227 (Orren) explains the fundamentals of cooling technology by means of a system of oscilla lles that make the material progress. However, this document does not provide any system for combating excessive wear of the plates and does not disclose any construction details which make it possible to ensure effective cooling of the plates in order to limit their wear. The design disclosed in this document provides only a number of ports to allow the injection of air.
[0004] Le document US4600380 (von Wedel) décrit une plaque de grille en forme de caisson percé de très fines fentes au travers desquelles est injecté l'air de refroidissement. Ce document propose d'injecter l'air selon un angle précis et prévoit de profiler des fentes de manière courbe, de telle sorte que la matière à refroidi r ne puisse pas s'écouler au travers des fentes j usqu'à éventuellement les boucher, en cas d'interruption imprévue de l'injection d'air de refroidissement. L'orifice de ces fentes est rétréci sur toute la longueur de la fente, ce qui provoque une perte de charge importante. Par ailleurs, aucune poche de rétention n'est prévue et la matière chaude est en contact direct avec toute la surface du caisson, ce qui entraîne généralement une usure prématurée.  US4600380 (von Wedel) discloses a box-shaped grid plate pierced with very thin slots through which is injected the cooling air. This document proposes to inject the air at a precise angle and plans to profile slots in a curved manner, so that the cooled material can not flow through the slots until they can be clogged, in case of unforeseen interruption of the cooling air injection. The orifice of these slots is narrowed over the entire length of the slot, which causes a significant loss of load. In addition, no retention pocket is provided and the hot material is in direct contact with the entire surface of the box, which generally leads to premature wear.
[0005] Le document US5282741 (Massaro) divulgue une plaque de grille comportant des poches dans la partie soumise au flux de matière à refroidir. Les poches à fond plat comportent également des fentes latérales pour réaliser une injection d'air, mais l'orientation des poches est parallèle au flux de matière, ce qui ne permet pas d'influer efficacement sur le débit. US5282741 (Massaro) discloses a grid plate having pockets in the part subjected to the flow of material to be cooled. The Flat bottom pockets also have side slots for air injection, but the orientation of the pockets is parallel to the flow of material, which does not effectively affect the flow.
[0006] Le document US5575642 (Willis) propose une plaque de grille munie de plusieurs poches dont les fonds sont plats, l'air de refroidissement étant injecté au travers des faces latérales des poches. Comme il est nécessaire de prévoir des chenaux pour amener l'air jusqu'à ces orifices d'injection, la surface soumise au contact de la matière chaude à refroidir reste importante.  The document US5575642 (Willis) proposes a grid plate provided with several pockets whose bottoms are flat, the cooling air being injected through the side faces of the pockets. Since it is necessary to provide channels to bring the air to these injection ports, the surface subjected to contact with the hot material to be cooled remains important.
[0007] Le document EP1060356 (Pirard) divulgue une plaque de grille comportant des poches d'une forme particulière avec un fond incliné et des canaux de passage d'air de refroidissement dans une configuration particulière. Ces poches n'ont pas une section triangulaire et présentent u n rebord au niveau du raccordement avec la surface de la grille. La plaque de grille divulguée par ce document ne présente pas non plus d'extrémité remontante avec une pente inverse à celle de la poche.  [0007] EP1060356 (Pirard) discloses a grid plate comprising pockets of a particular shape with an inclined bottom and cooling air passage channels in a particular configuration. These pockets do not have a triangular section and have a rim at the connection with the surface of the grid. The grid plate disclosed by this document also has no upward end with a slope opposite that of the pocket.
[0008] Le document DE 195 37 904 A1 divulgue une plaque de grille sans poches. La présence de poches est cependant nécessaire au refroidissement de la grille car la matière piégée dans les poches, et déjà refroidie, protège la grille contre la surchauffe. Les angles précisés dans ce document concernent les canaux d'injection de gaz de refroidissement à la surface de la grille. Ces angles n'ont pas de rapport avec une quelconque extrémité remontante avec pente inverse.  [0008] DE 195 37 904 A1 discloses a grid plate without pockets. The presence of pockets is however necessary to the cooling of the grid because the matter trapped in the pockets, and already cooled, protects the grid against overheating. The angles specified in this document relate to the cooling gas injection channels on the grid surface. These angles are not related to any upward end with reverse slope.
Buts de l'invention Goals of the invention
[0009] La plaque de grille selon la présente invention tente de surmonter les inconvénients des plaques de grille de l'état de la technique. L'invention vise plus particulièrement une plaque de grille d'une conception particulièrement performante permettant une vitesse de progression régulière du lit de matière associée à un refroidissement efficace grâce à une injection d'air de refroidissement performante dans le système supportant le lit de matière, permettant ainsi une maîtrise de l'usure inévitable de ces supports.  The grid plate according to the present invention attempts to overcome the disadvantages of the grid plates of the state of the art. The invention relates more particularly to a grid plate of a particularly powerful design allowing a steady rate of progression of the bed of material associated with efficient cooling by injecting efficient cooling air into the system supporting the bed of material, thus allowing a control of the inevitable wear of these supports.
Résumé de l'invention Summary of the invention
[0010] La présente invention divulgue une plaque de grille pour le transport et le refroidissement de matières très chaudes sortant d ' un four, ladite plaque comportant des cavités de forme rectangulaire, la plus grande dimension étant perpendiculaire à la direction d'avancement de la matière, la section de ces cavités étant triangulaire avec un fond en forme d 'ailette se terminant par une extrémité remontante avec une pente inverse, la pente des cavités étant comprise entre 10 et 45° , de préférence entre 20 et 30° par rapport à l'horizontale, et la pente inverse (β) de l'extrémité remontante étant d'un angle égal ou inférieur jusqu'à 6° à l'angle (a) de la pente des cavités. The present invention discloses a grid plate for transporting and cooling very hot materials leaving an oven, said plate having cavities of rectangular shape, the largest dimension being perpendicular to the direction of advancement of the matter, the section of these cavities being triangular with a fin-shaped bottom terminating in a upward end with a reverse slope, the slope of the cavities being between 10 and 45 °, preferably between 20 and 30 ° with respect to the horizontal, and the slope inverse (β) of the ascending end being at an angle equal to or less than 6 ° to the angle (a) of the slope of the cavities.
[001 1 ] Selon des modes d'exécution particuliers de l'invention, celle-ci com porte au moi ns une ou une combinaison appropriée des caractéristiques suivantes :  According to particular embodiments of the invention, the latter comprises at least one or an appropriate combination of the following characteristics:
le fond de chaque cavité présente une ou plusieurs fentes d'injection d'air de refroidissement débouchant dans la partie la plus basse de chacune des cavités, ces fentes étant orientées de manière à injecter l'air parallèlement au fond des cavités, ces fentes étant réalisées par le biais d'une surépaisseur de matière disposée sur la surface inférieure des éléments constitutifs de la plaque de grille de manière à rétrécir localement l'espace situé entre deux ailettes successives ;  the bottom of each cavity has one or more cooling air injection slots opening into the lowest part of each of the cavities, these slots being oriented so as to inject the air parallel to the bottom of the cavities, these slots being performed by means of a material allowance disposed on the lower surface of the elements constituting the gate plate so as to locally narrow the space between two successive fins;
l'extrémité remontante de l'ailette a une longueur d'au moins 20 mm ;  the ascending end of the fin has a length of at least 20 mm;
la plaque de grille comporte également sur la face frontale une ou plusieurs fentes d'injection d'air ;  the gate plate also has on the front face one or more air injection slots;
les fentes de la face frontale de la plaque de grille ont la même longueur que les fentes débouchant en fond de cavités ;  the slots of the front face of the grid plate have the same length as the slots opening into the bottom of the cavities;
les fentes de la face frontale de la plaque de grille sont agencées à une distance comprise entre 5 et 40 millimètres du plan de la face supérieure de la plaque de grille.  the slots of the front face of the grid plate are arranged at a distance of between 5 and 40 millimeters from the plane of the upper face of the grid plate.
[0012] La présente invention divulgue également un refroidisseur à grille comportant une plaque de grille selon l'une quelconque des caractéristiques précédentes.  The present invention also discloses a gate cooler having a gate plate according to any one of the preceding features.
Brève description des figures Brief description of the figures
[0013] La figure 1 représente une vue en trois dimensions de la plaque de grille selon l'invention.  Figure 1 shows a three-dimensional view of the grid plate according to the invention.
[0014] La figure 2 représente un assemblage de plaques de grille d'une chaîne de transport.  [0014] Figure 2 shows a grid plate assembly of a transport chain.
[0015] La figure 3 représente une vue en coupe de la plaque de grille selon l'invention.  Figure 3 shows a sectional view of the grid plate according to the invention.
[0016] La figure 4 représente en détail une vue en coupe de la plaque de grille selon l'invention avec les angles alpha et béta. [0017] La figure 5 représente une vue en coupe de plusieurs plaques de grille disposées sur une chaîne de transport d'un refroidisseur de grille. Figure 4 shows in detail a sectional view of the grid plate according to the invention with the angles alpha and beta. FIG. 5 represents a sectional view of a plurality of grid plates arranged on a transport chain of a gate cooler.
[0018] Légende [0018] Legend
1 . Plaque de grille  1. Grid plate
2. Cavité  2. Cavity
3. Ailette  3. Ailette
4. Extrémité remontante  4. Ascending end
5. Fentes d'injection d'air de refroidissement dans la cavité  5. Cooling air injection slots in the cavity
6. Fentes d'injection d'air de refroidissement sur la face frontale de la plaque de grille  6. Cooling air injection slots on the front side of the grate plate
Description détaillée de l'invention Detailed description of the invention
[0019] La présente invention concerne un élément constitutif d'un système de refroidissement destiné à refroidir efficacement et économiquement une matière en vrac se trouvant au départ à une température élevée, généralement supérieure à 1000 ° C. Un tel système de refroidissement prévoit de faire progresser un lit de matière très chaude à une vitesse régulière sur des plaques de grille aérées tout en insufflant de l'air froid destiné à refroidir cette matière.  The present invention relates to a constituent element of a cooling system for efficiently and economically cool bulk material initially at an elevated temperature, generally above 1000 ° C. Such a cooling system provides for progress a bed of very hot material at a steady speed on airy grid plates while blowing cold air to cool this material.
[0020] Les paramètres qui doivent être rigoureusement maîtrisés sont les suivants : The parameters that must be strictly controlled are the following:
vitesse de progression du lit de matière à refroidir ;  rate of progression of the bed of material to be cooled;
efficacité du refroidissement ;  cooling efficiency;
régularité de l'injection d'air de refroidissement ;  regularity of the cooling air injection;
- refroidissement du système supportant le lit de matière ;  cooling the system supporting the bed of material;
maîtrise de l'usure des éléments ;  control of the wear of the elements;
meilleure protection du châssis et du mécanisme du système contre les agressions possibles provenant de la matière à refroidir. [0021 ] La conception étudiée et le design de ces éléments supports, appelés plaques de grille sont de première importance.  better protection of the frame and mechanism of the system against possible attacks from the material to be cooled. The studied design and design of these support elements, called grid plates are of primary importance.
[0022] Dans la présente invention , i l est proposé de maîtriser de manière particulièrement efficace la progression du lit de matière à refroidir par l'utilisation de plusieurs poches ou cavités (2) dont le fond en forme d'ailette (3) est incliné selon une pente montante dans le sens de la progression de la matière à refroidir, la section de la cavité (2) étant globalement un triangle, ce qui signifie que chaque cavité (2) présente une intersection selon une ligne droite avec le plan de la grille et donc une transition douce dans le sens de l'avancement de la matière. Il n'y a aucun rebord, aucune nervure, barrette ou quelque autre obstacle tendant à ralentir la progression de la matière. Ce design permet une progression efficace et régulière de la matière à refroidir. In the present invention, it is proposed to control particularly effectively the progression of the bed of material to be cooled by the use of several pockets or cavities (2), the bottom wing-shaped (3) is inclined according to a rising slope in the direction of the progression of the material to be cooled, the section of the cavity (2) being generally a triangle, which means that each cavity (2) has an intersection in a straight line with the plane of the grid and therefore a smooth transition in the direction of advancement of the material. There is no rim, rib, bar or any other obstacle that tends to slow the progression of the material. This design allows an efficient and regular progression of the material to be cooled.
[0023] Le choix du nombre de cavités et de l'angle de pente du fond des poches est conditionné par le débit souhaité.  The choice of the number of cavities and the slope angle of the bottom of the pockets is conditioned by the desired flow rate.
[0024] L'air de refroidissement est injecté au travers de l'espace compris entre deux ailettes successives dans le fond des cavités, cet espace étant rétréci localement juste avant de déboucher dans le fond de chaque cavité grâce à une surépaisseur de matière concentrée exclusivement sur la face inférieure de l'ailette supérieure et de manière à ce que l'air soit injecté par une ou plusieurs fentes. Cette réduction de section est réalisée sur une portion très limitée du passage, de manière à réduire la perte de charge. Lorsqu'il débouche dans la cavité, le passage a l'aspect d'une fente de 2 à 10 millimètres de largeur et de 20 à 280 millimètres de longueur.  The cooling air is injected through the space between two successive fins in the bottom of the cavities, this space being narrowed locally just before opening into the bottom of each cavity with a concentrated material overprint exclusively on the underside of the upper fin and so that the air is injected by one or more slots. This section reduction is performed on a very limited portion of the passage, so as to reduce the pressure drop. When it opens into the cavity, the passage has the appearance of a slot of 2 to 10 millimeters in width and 20 to 280 millimeters in length.
[0025] En service, pour des raisons diverses, l'alimentation en air de refroidissement peut se trouver brusquement interrompue de manière accidentelle. I l faut éviter à ce moment que la matière à refroidir se trouvant sur la grille et remplissant les cavités ne tende à s'écou ler par gravité au travers des fentes d'injection d'air, ce qui aurait pour effet soit de remplir la partie inférieure de la grille et compromettrait le redémarrage de l'injection d'air, soit d'entrer en contact avec le châssis et le mécanisme de l'équipement, ce qui aurait pour effet de les endommager. A cette fin, l'extrémité inférieure de chaque ailette formant fond de cavité est inclinée de manière telle qu'elle forme avec l'horizontale un angle β égal ou inférieur de 6° maximum à celui a du fond de la cavité mais avec une pente inverse, c'est-à-dire descendante dans le sens de la progression de la matière à refroidi r. Cette portion avec pente inverse doit avoir une longueu r minimale suffisante pour interrompre efficacement le flux éventuel de matière au travers du passage d'injection d'air. Cette longueur est généralement supérieure à 1 5 mm, de préférence supérieure à 20 mm. In use, for various reasons, the cooling air supply can be abruptly interrupted accidentally. At this point, it must be avoided that the material to be cooled on the grid and filling the cavities tends to flow by gravity through the air injection slots, which would have the effect of either filling the lower part of the grid and would jeopardize the restart of the air injection, to come into contact with the chassis and the mechanism of the equipment, which would have the effect of damaging them. For this purpose, the lower end of each cavity-bottom fin is inclined so that it forms with the horizontal an angle β equal to or less than 6 ° maximum to that at the bottom of the cavity but with a slope inverse, that is to say, descending in the direction of the progression of the material to be cooled r. This portion with inverse slope must have a minimum length sufficient to effectively interrupt the possible flow of material through the air injection passage. This length is generally greater than 1 5 mm, preferably greater than 20 mm.
[0026] Dans le but de limiter la vitesse d'usure des grilles, il faut non seulement refroidir la matière, mais également les grilles elles-mêmes lorsqu'elles sont en service. A cette fin, il est prévu d'injecter l'air dans le fond des cavités de la grille, en respectant un débit et une vitesse suffisants, mais également selon un flux dont la direction est parallèle au fond des cavités, de telle sorte que la paroi constitutive du fond de la cavité soit efficacement balayée par l'air et refroidie. [0027] La durée de vie de la plaque de grille est déterminée par le fait que, au-delà d'une certaine usure se traduisant par une diminution de l'épaisseur des éléments et parois constitutifs de la grille soumise aux phénomènes d'oxydation et d'abrasion d us au passage d e la m atière à refroidi r, la g ri lle ne rem p lit plus correctement sa fonction et doit être démontée, ce qui nécessite l'arrêt complet de l'installation, ce qui est extrêmement pénalisant puisqu'il suppose de laisser le temps à l'installation complète de refroidir suffisamment pour permettre une intervention. Pour atteindre cet objectif, il faut combattre le phénomène d'abrasion en limitant strictement les surfaces de la plaque de grille qui sont directement exposées à la matière chaude et combattre le phénomène d'oxydation en faisant en sorte que ces surfaces soient efficacement refroidies. In order to limit the speed of wear of the grids, it is necessary not only to cool the material, but also the grids themselves when they are in use. To this end, it is planned to inject air into the bottom of the cavities of the grid, respecting a sufficient flow rate and speed, but also according to a flow whose direction is parallel to the bottom of the cavities, so that the constituent wall of the bottom of the cavity is effectively swept by air and cooled. The life of the gate plate is determined by the fact that, beyond a certain wear resulting in a decrease in the thickness of the elements and walls constituting the gate subjected to oxidation phenomena. and abrasion d us the passage of the m conti to cool, the g ril does not replace more correctly its function and must be disassembled, which requires the complete stop of the installation, which is extremely penalizing since it supposes to leave the time to the complete installation to cool sufficiently to allow an intervention. To achieve this objective, it is necessary to combat the phenomenon of abrasion by strictly limiting the surfaces of the grid plate which are directly exposed to the hot material and fight the oxidation phenomenon by ensuring that these surfaces are effectively cooled.

Claims

REVENDICATIONS
1. Plaque de grille (1 ) pour le transport et le refroidissement de matières très chaudes sortant d'un four, ladite plaque comportant des cavités (2) de forme rectangulaire, la plus grande dimension étant perpendiculaire à la direction d'avancement de la matière, la section de ces cavités (2) étant triangulaire avec un fond en forme d'ailette (3) se terminant par une extrémité remontante (4) avec une pente inverse, la pente (a) des cavités (2) étant comprise entre 10 et 45°, de préférence entre 20 et 30° par rapport à l'horizontale, et la pente inverse (β) de l'extrémité remontante étant d'un angle égal ou inférieur jusqu'à 6° à l'angle (a) de la pente des cavités (2).  1. Gridding plate (1) for transporting and cooling very hot materials leaving an oven, said plate having cavities (2) of rectangular shape, the largest dimension being perpendicular to the direction of advancement of the material, the section of these cavities (2) being triangular with a fin-shaped bottom (3) terminating in a rising end (4) with a reverse slope, the slope (a) of the cavities (2) being between 10 and 45 °, preferably between 20 and 30 ° relative to the horizontal, and the inverse slope (β) of the upward end being at an angle equal to or less than 6 ° to the angle (a ) of the slope of the cavities (2).
2. Plaque de grille (1) selon la revendication 1 présentant dans le fond de chaque cavité (2) une ou plusieurs fentes d'injection d'air de refroidissement (5) débouchant dans la partie la plus basse de chacune des cavités, ces fentes étant orientées de manière à injecter l'air parallèlement au fond des cavités, ces fentes (5) étant réalisées par le biais d'une surépaisseur de matière disposée sur la surface inférieure des éléments constitutifs de la plaque de grille de manière à rétrécir localement l'espace situé entre deux ailettes (3) successives.  2. Grid plate (1) according to claim 1 having in the bottom of each cavity (2) one or more cooling air injection slots (5) opening into the lowest part of each of the cavities, these slots being oriented to inject the air parallel to the bottom of the cavities, these slots (5) being made through a material allowance disposed on the lower surface of the constituent elements of the grid plate so as to shrink locally the space between two successive fins (3).
3. Plaque de grille (1) selon les revendications 1 ou 2, caractérisée en ce que l'extrémité remontante (4) de l'ailette (3) a une longueur d'au moins 20 mm.  3. Grid plate (1) according to claims 1 or 2, characterized in that the upward end (4) of the fin (3) has a length of at least 20 mm.
4. Plaque de grille (1) selon l'une quelconque des revendications précédentes, caractérisée en ce que la plaque de grille comporte également sur la face frontale une ou plusieurs fentes d'injection d'air (6).  4. Grid plate (1) according to any one of the preceding claims, characterized in that the gate plate also has on the end face one or more air injection slots (6).
5. Plaque de grille (1) selon la revendication (4), caractérisée en ce que les fentes de la face frontale de la plaque de grille ont la même longueur que les fentes débouchant en fond de cavités (2).  5. Grid plate (1) according to claim (4), characterized in that the slots of the front face of the gate plate have the same length as the slots opening into the bottom of cavities (2).
6. Plaque de grille (1) selon la revendication (4), caractérisée en ce que les fentes de la face frontale de la plaque de grille sont agencées à une distance comprise entre 5 et 40 millimètres du plan de la face supérieure de la plaque de grille (1 ).  6. Grid plate (1) according to claim (4), characterized in that the slots of the front face of the grid plate are arranged at a distance of between 5 and 40 millimeters from the plane of the upper face of the plate. gate (1).
7. Refroidisseur à grille comportant une plaque de grille selon l'une quelconque des revendications précédentes.  A grid cooler having a grid plate according to any of the preceding claims.
EP11718383.0A 2010-06-03 2011-05-06 Grid plate Active EP2577203B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11718383T PL2577203T3 (en) 2010-06-03 2011-05-06 Grid plate

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE2010/0339A BE1019360A3 (en) 2010-06-03 2010-06-03 GRID PLATE.
PCT/EP2011/057320 WO2011151130A1 (en) 2010-06-03 2011-05-06 Grid plate

Publications (2)

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EP2577203A1 true EP2577203A1 (en) 2013-04-10
EP2577203B1 EP2577203B1 (en) 2020-04-01

Family

ID=43413716

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US (1) US9677816B2 (en)
EP (1) EP2577203B1 (en)
JP (1) JP5738402B2 (en)
KR (1) KR101812364B1 (en)
CN (1) CN102939508B (en)
BE (1) BE1019360A3 (en)
BR (1) BR112012030758B1 (en)
CA (1) CA2799422C (en)
CL (1) CL2012003225A1 (en)
ES (1) ES2791777T3 (en)
HU (1) HUE049179T2 (en)
MX (1) MX344393B (en)
MY (1) MY173425A (en)
PL (1) PL2577203T3 (en)
PT (1) PT2577203T (en)
RU (1) RU2556799C2 (en)
WO (1) WO2011151130A1 (en)
ZA (1) ZA201208909B (en)

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PL2645034T3 (en) * 2012-03-28 2015-10-30 Alite Gmbh Grate element for a grate cooler
DE102014008010B4 (en) * 2014-06-05 2018-11-29 Khd Humboldt Wedag Gmbh Grate plate for a grate cooler
CN105546999B (en) * 2016-03-14 2019-01-22 山东大学 A kind of grate plate, grate cooler module and grate-cooler
RU2640701C1 (en) * 2016-07-13 2018-01-11 Александр Сергеевич Зубачев Cooler grate with shearing grate grids
RU174873U1 (en) * 2016-07-26 2017-11-08 Александр Сергеевич Зубачев Cooler grate with repulsive grate
CN106352709B (en) * 2016-09-29 2018-10-12 张家港长力机械有限公司 Circular cooler trolley

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Publication number Publication date
JP5738402B2 (en) 2015-06-24
ZA201208909B (en) 2013-07-31
MY173425A (en) 2020-01-23
BR112012030758B1 (en) 2021-01-19
PT2577203T (en) 2020-05-11
JP2013533451A (en) 2013-08-22
RU2012148622A (en) 2014-07-20
RU2556799C2 (en) 2015-07-20
CA2799422A1 (en) 2011-12-08
BE1019360A3 (en) 2012-06-05
US20130130188A1 (en) 2013-05-23
PL2577203T3 (en) 2020-11-02
HUE049179T2 (en) 2020-09-28
MX2012014020A (en) 2013-01-24
CN102939508A (en) 2013-02-20
KR20130111933A (en) 2013-10-11
US9677816B2 (en) 2017-06-13
EP2577203B1 (en) 2020-04-01
MX344393B (en) 2016-12-13
BR112012030758A2 (en) 2016-11-01
ES2791777T3 (en) 2020-11-05
CA2799422C (en) 2017-12-19
CL2012003225A1 (en) 2013-03-08
KR101812364B1 (en) 2017-12-26
CN102939508B (en) 2016-04-13
WO2011151130A1 (en) 2011-12-08

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