EP0811818B1 - Plaque de grille et procédé pour sa fabrication - Google Patents

Plaque de grille et procédé pour sa fabrication Download PDF

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Publication number
EP0811818B1
EP0811818B1 EP97107556A EP97107556A EP0811818B1 EP 0811818 B1 EP0811818 B1 EP 0811818B1 EP 97107556 A EP97107556 A EP 97107556A EP 97107556 A EP97107556 A EP 97107556A EP 0811818 B1 EP0811818 B1 EP 0811818B1
Authority
EP
European Patent Office
Prior art keywords
plate
grate
material carrier
gas ducts
carrier plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97107556A
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German (de)
English (en)
Other versions
EP0811818B2 (fr
EP0811818A1 (fr
Inventor
Otto Dipl-Ing. Heinemann
Hermann Dipl.-Ing. Niemerg
Norbert Bredenhöller
Ludger Dr.-Ing. Brentrup
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.)
ThyssenKrupp Industrial Solutions AG
Original Assignee
Krupp Polysius AG
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Publication date
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Application filed by Krupp Polysius AG filed Critical Krupp Polysius AG
Publication of EP0811818A1 publication Critical patent/EP0811818A1/fr
Application granted granted Critical
Publication of EP0811818B1 publication Critical patent/EP0811818B1/fr
Publication of EP0811818B2 publication Critical patent/EP0811818B2/fr
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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
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
    • F27B21/02—Sintering grates or tables
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/496—Multiperforated metal article making

Definitions

  • the invention relates to a grate plate for installation in a grate device for heat exchange between pourable goods and treatment gas, especially for Mounting on a grate plate support in a grate cooler, according to the preamble of claim 1, and a method for producing a grate plate, according to the preamble of claim 19.
  • grate plates of the required type in various grate devices to be installed in which a pourable good, e.g. Cement materials, ore materials and the like, with the help from flowing through the top layer from bottom to top Treated gases in the manner required become.
  • a pourable good e.g. Cement materials, ore materials and the like
  • This can be, for example, a Preheating, pre-burning, burning and above all cooling act on the materials mentioned.
  • German Patent application 195 37 904.7 is a grate plate of the kind proposed by their construction a particularly cheap and even one Flow through the material to be treated and thus an optimal one Heat exchange between product and treatment gas achieved shall be.
  • the gas passage channels in the crop support plate each to be designed in the manner of a pipe and approximately in a zigzag fashion, whereby they move overall in the direction of material conveyance diagonally from the underside of the plate to the top of the plate should extend.
  • EP-B-0 167 658 is also a box-shaped one Grate floor element with two lateral supporting webs known, which are vertical and in the longitudinal direction of the plate extend and on which the surface determining and between them fine, over the entire grate element width continuous, gas-slit-forming, strip-shaped bodies are attached in a ladder or tine shape.
  • Each two such ladder or fork-shaped structures lateral support bars and lasts are complementary and put together in a form-fitting manner, that the ledge bodies running parallel to each other Overall, a flat load bearing surface with the one in between Form remaining gas passage slots.
  • Each slat body essentially consists from a main section forming the grate floor surface and an approach attached to it, which in installed condition one adjacent slat body reaches under. Also are on the front Edges of the main section of each slat body two Spacer projections formed on the trailing edges of each previously inserted into the frame Create lamellar body, so that between two adjacent slat bodies a gas passage slot remains free. To secure the slat body in the frame, becomes a special on the front end of the frame trained lamellar body threaded, the has an end flange protruding downwards, which is welded to the front bulkhead or otherwise Way is firmly connected.
  • DE-A-37 34 043 is a grate cooler for cooling hot bulk material revealed.
  • box-shaped Grate plate support with flat top cover plates provided, each of which is also of a flat design Grate plate are covered on their front End is angled down.
  • cover plate of the Grate plate carrier and in the flat arranged above Grate plates are slit-shaped gas openings provided while lying between these two flat plates as a connection between the above-mentioned gas passage openings Connection openings are formed. Because the gas passage openings in the two superimposed flat plates in the longitudinal direction of each other are to be avoided that solids due to a failure of the cooling gas supply the gas passage openings can fall down, with throttling devices in this opening system can be arranged.
  • the invention is therefore based on the object Grate plate according to the preamble of the claim 1 and a method for producing a grate plate according to the preamble of claim 19 further improve that the Guttragplatte itself at extremely abrasive goods, e.g. Cement clinker or Like., a relatively long life (long service life) owns and thereby through a relatively cheap and characterized by inexpensive production.
  • extremely abrasive goods e.g. Cement clinker or Like., a relatively long life (long service life) owns and thereby through a relatively cheap and characterized by inexpensive production.
  • the support plate made of highly wear-resistant reworked i.e. subsequently made highly wear-resistant Rolled steel plate material made, and the Gas passage channels are - in the vertical longitudinal section viewed through the support plate - essentially straight and sloping in the conveying direction in this Guttragplatte incorporated.
  • the gas passage channels essentially straight and oblique in Direction of conveyance incorporated into this support plate are.
  • the latter can be done in a relatively simple manner but very precise and the respective requirements done appropriately, especially through a special high-energy cut process, such as it will be explained in more detail later.
  • the training and Alignment of the gas passage channels ensures a good penetration of what is on the support plate Good of the gas to be supplied (e.g. cooling air with a cooling grate), with a certain support for that on the associated Grating device to be transported along well achieved can be.
  • the Guttragplatte in this grate plate according to the invention As explained before - from relatively thin plate material can be produced, it is appropriate to ensure their stabilization so that none disturbing vibrations during the operation of the associated Grate device, e.g. grate cooler. For this reason it is initially provided that the Plate body within its outer frame structure a parallel frame side panels firmly together has a connecting support structure made of stiffening elements, on which the Guttragplatte in places between supported the gas passage channels and at least is partially attached.
  • This scaffold connects thus parallel frame side parts, especially the Long side parts firmly and therefore sufficiently stable with each other, with the bottom of the support plate additionally on the stiffening elements of this support frame supported and in places between the Gas passage channels at least partially attached becomes. This also ensures at the same time that the treatment gas or cooling gas on its way from the underside of the plate to the top of the plate (into the Treating goods) not at all or not significantly impaired becomes.
  • the stiffening elements of the scaffolding at least in part in the form of with parallel Distances to each other, in the transverse direction of the plate between the long sides of the outer Frame structure extending support ribs with a flat channel cross-section open at the top are, the one channel longitudinal edge of each support rib directed against the underside of the support plate and is connected to this underside of the plate during the other rib longitudinal edge with the formation of a gas passage gap with a parallel distance to the underside of the plate runs, and that the gas passage channels in the Guttragplatte itself slit-shaped and approximately parallel to extend the support ribs, being on the underside of the plate each over the channel cross-section of the one below Open out support ribs.
  • the manufacture of the grate plate according to the invention it is in the sense of a relatively cheap and inexpensive Manufacture especially for the Guttragplatte as well as for one well distributed and unhindered passage of the treatment gases also important that the gas passage channels as economically and precisely as possible Guttragplatte can be incorporated. In advantageous This is done by the high-energy cut process mentioned above.
  • a rolled steel plate material can be commercially available Composite steel plates are used, the top one Post-hardened or highly wear-resistant layer is formed by a hard build-up welding layer and a hardness of about 58 to 68 HRC (according to Rockwell) owns.
  • This rolled steel plate material stands out with a particularly high level of stability.
  • the gas passage channels in the Guttragplatte can expediently a plasma burning process, a laser burning process, a high pressure water jet abrasive cutting process or some other similar high energy Separation cutting methods are used.
  • a plasma burning process e.g. post-hardened or provided with hard overlay welding layer
  • a high pressure water jet abrasive cutting process or some other similar high energy Separation cutting methods are used.
  • each Trap can by such - known - separation cutting processes be ensured that even after the fact highly wear-resistant (e.g. post-hardened or provided with hard overlay welding layer)
  • Highly wear-resistant e.g. post-hardened or provided with hard overlay welding layer
  • the grate plate according to the invention it is also considered particularly useful if inside the outer frame structure of the base plate body a support structure made of stiffening elements is on which the Guttragplatte in places supported and at least partially attached, the are located between gas passages.
  • This The measure proves to be particularly advantageous in that than thereby the highly wear-resistant reworked Rolled steel plate material can be relatively thin.
  • the support plate can thus - as already mentioned above indicated - optimal without obstructing the gas flow supported and made of relatively inexpensive, commercially available Rolled steel plate material can be made without that the risk of building up unwanted vibrations in the support plate or undesirable bending stresses can occur in it.
  • Embodiments are assumed that the grate plate according to the invention for installation in a grate cooler, preferably moving grate cooler, for cooling extremely abrasive hot goods executed and determined is.
  • the grate plate according to the invention with equally good success installed in other roughly similar grate devices can be in which pourable goods are a heat exchange with treatment gas, for example preheating or burning the respective goods should.
  • the aforementioned installation is a rust plate in a grate cooler for extremely hard-wearing Goods, as is especially the case with cement clinker is. Since rust cooler of the type in question here, how e.g. Moving grate cooler or the like, are generally known, needs to build such a grate cooler here not to be discussed in more detail.
  • the grate plate 1 contains a plate base body as main components 4 with an outer frame structure 5 as well one on the upper edge 5a of this frame structure 5-preferred through welds - fastened crop support plate 6, designed as a flat plate is.
  • this support plate is a variety of essentially of the same size and of the same design Gas passage channels 7 formed, the continuous from the underside of the plate 6a to the top of the plate 6b of this support plate 6 are provided.
  • the grate plate carrier 2 is designed as a hollow body and serves in addition to the arrangement and attachment of the grate plates 1 also the supply of cooling gas or of cooling air, as shown in Fig. 1 by dashed lines Arrows 8 is indicated, so that this cooling gas (Arrow 8) from below into the hollow box-like Grate plate 1 introduced and then through the gas passage channels 7 evenly distributed in that on the Enter the refrigerated goods located on the top of the product support plate 6 can. At the same time, there is also a good one Cool down the grate plate itself.
  • the grate plate 1 on the grate plate support 2 provides a Clamping screw 9, which with its head part 9a in a Plate base 4 trained attachment approach 10 engages and with their opposite, outer end 9b through a longitudinal wall 2a of the grate plate carrier 2 2 reaches out and there with Is tightened with the help of a screw nut 11.
  • Fig.1 can also be seen that the in the direction of good (Arrow 3) facing front part of the grate plate 1 is bounded below by a base plate 12, the one rear connecting edge 12a for positive Connection with the longitudinal edge 2b facing it has hollow grate plate support 2.
  • this grate plate according to the invention 1 it is now important that the Guttragplatte 6th Made of highly wear-resistant reworked rolled steel plate material is manufactured, i.e. one from the start Rolled steel plate material already made from a special alloy subsequently becomes highly wear-resistant made, e.g. post-hardened or with a hard overlay weld layer Mistake.
  • Such rolled steel plate material is commercially available but will so far only for special machine parts in general Mechanical engineering, but not for rust devices Treatment of abrasive goods used.
  • Grate plate 1 also considered appropriate, that the plate body 4 within its outer Frame structure 5 a parallel frame side parts, i.e. at least its long side walls or long side parts 5b and 5c support frame firmly connected 13 made of stiffening elements, namely support ribs 14 and stiffening webs 15, on which the support plate 6 at locations between the gas passage channels 7 supported and at least partially attached, preferably welded.
  • the support structure is in place 13 essentially from the total approximately honeycomb composite support ribs 14 and stiffening webs 15.
  • the support ribs 14 - like also shows Fig.6 - with parallel distances to each other arranged, in the transverse direction of the plate, i.e. perpendicular to the direction of material conveyance (arrow 3 in Fig. 1) between the long side walls or long side parts 5b and 5c of the outer frame structure 5 extend and are firmly connected to them.
  • these support ribs 14 expediently one flat channel cross section open at the top, whereby one channel longitudinal edge (14a) of each support rib 14 the underside of the plate 6a and the other longitudinal edge of the gutter (14b) is at a distance from the underside of the plate 6a.
  • the gutter cross section mentioned everyone Support rib 14- as shown in Figs. 1, 3, 4 and 5 - approximately in the form of an isosceles angle is formed, the in the material conveying direction (Arrow 3) pointing shorter rib legs 14a firmly the lower side 6a is connected, the longer one Rib legs 14b including one - as in the figures shown - flat acute angle - in Material conveying direction (arrow 3) - against the underside of the plate 6a rises obliquely backwards and wherein both rib legs 14a and 14b over an arc curved apex section 14c directly into one another are temporarily connected to each other.
  • the gas passage channels 7 generally from the plate underside 6a to the plate top 6b essentially straight and oblique to the direction of material conveyance (Arrow 3) ascending into the support plate 6, 6 'are incorporated.
  • the gas passage channels 7 extend in the support plate 6, 6 'slit-shaped and approximately parallel to the Support ribs 14 (each perpendicular to the drawing planes 1, 3, 4 and 5)).
  • the gas passage channels 7 open in these first exemplary embodiments on the underside of the plate 6a in each case - cf. in particular Fig.1 - above the channel cross-section, preferably in the middle area of this channel cross-section, the underlying support ribs 14, whereby these support ribs 14 are simultaneously a type of gas or Air control elements (as an extension or continuation of the Form gas passage channels 7).
  • Cooling gas or cooling air With a view to a particularly effective and even loading of the goods to be cooled with Cooling gas or cooling air is considered advantageous if if - according to a first embodiment - crosswise to the material conveying direction (arrow 3) several essentially equally large, slot-shaped gas passage channels 7 each in a transverse row and several such transverse rows in the longitudinal direction of the slab (parallel to the material conveying direction, Arrow 3) with equal intervals in a row and - viewed in the direction of good conveyance (arrow 3) - at least in the front longitudinal section of the crop support plate 6 and 6 'are arranged, as in the supervision can be seen on the grate plate 1 according to FIG.
  • the gas passage channels 7 in adjacent one another Cross rows are offset from one another or arranged on a gap.
  • this channel shape allows a very effective one Passage of the cooling gas in the on the support plate 6 refrigerated goods and, on the other hand, enables that possibly through the gas passage channels 7 after finest particles in the bottom open cross-section of the support ribs 14 caught and blown back towards the top of the plate can be. There is also a good cooling effect on the grate plate itself.
  • Grate plate 1 As already expressed several times above has been used in the production of the support plate 6 or 6 'made of a highly wear-resistant rolled steel plate material an important feature of this invention Grate plate 1 seen. Particularly inexpensive is it the Guttragplatte 6, 6 'from one commercially available, highly wear-resistant due to subsequent hardening made of rolled steel plate material, with at least one top layer in particular post-hardened or wear-resistant Hard build-up welding layer is formed and a hardness - according to Rockwell - from about 58 to 68 HRC.
  • the support plate 6 at least two immediately one on top of the other, the same throughout Has layers 6.1 or 6.2 having layer thickness.
  • the lower plate layer 6.1 can consist of one there are specially alloyed rolled steel plate materials, and on this lower plate layer 6.1 is the upper one Plate layer 6.2 as particularly highly wear-resistant Material layer by hard overlay welding - in a suitable Thickness and with the stated hardness - applied.
  • Shape and course of the channel-shaped support ribs 14 can initially correspond to what already exists described above in particular with reference to FIGS. 3 and 4 has been.
  • the channel-shaped support ribs 14 are now - over the length of each support rib 14 evenly distributed - several upright and in Longitudinal plate direction (i.e. in the direction of material conveyance Arrow 3) extending stiffening webs 15 firmly attached.
  • stiffening webs 15 are not only in Transverse direction of plate provided evenly distributed, but they also go over the gutter cross section of the associated support rib 14 and connect each two mutually adjacent support ribs 14 firmly together, being from the gutter cross section to the bottom 6a of the support plate 6 or 6 'are sufficient.
  • the scaffold 13- is special 6 shows - approximately honeycomb-shaped with rectangular honeycombs, the stiffening webs 15 the Guttragplatte 6 and 6 'at positions between each other in the transverse direction of the plate adjacent gas passage channels 7 support and at least partially, e.g. roughly grid-shaped, firmly connected to the underside of the plate 6a, are preferably welded.
  • the plate body 4 is now useful with his Frame structure 5, the support structure 13 formed therein and the attachment projection 10 as a one-piece cast body, preferably made of cast steel, thus the support frame 13 from the support ribs 14 and the stiffening webs 15 with the frame structure 5 in cast in one piece.
  • This also contributes to one inexpensive manufacture of the grate plate 1. If the attachment projection 10 - as shown in Fig. 6 - places - on at least one in the area of the longitudinal center the grate plate 1 or the plate base body 4 between the end face parts (or walls) 5d, 5e extending stiffening rib is formed, then the latter also ensures additional stability of the Base plate body 4.
  • FIG. relate to the cross-sectional shape of the Support ribs 14 '', which in their arrangement and Distribution under the 6 '' support plate and in the base plate 4 or in its outer frame structure 5 exactly match what is shown above 1 to 6, in particular with reference to FIGS. 5 and 6, has been explained so that it is expressly referred to can be. While with reference to Fig.1, 3, and 5 the stiffening ribs 14 the cross-sectional shape of have unequal legs, has in the Design variant according to FIG. 7 each support rib 14 '' an approximately flat-arched, bent downward Channel cross section.
  • each running a bead-like Constriction element 21 is provided, which is approximately the shape of a Can have semicircular strips (as shown in FIG. 7) and thereby from the underside 6''a of the support plate 6 '' against the channel cross section downwards protrudes that it together with the associated Support rib 14 '' forms a lower channel section 7''a in the lower end of the associated gas passage 7 '' empties.
  • the kind of Semicircular constriction elements 21 can as separate parts, for example on the underside of the plate 6''a attached or also in one piece with the plate base body 4 be made.
  • the support ribs 14 '' according to FIG. 7 should be added that - as can be seen in the drawing - here too a channel longitudinal edge of each support rib 14 '' against the Underside 6''a of the support plate 6 '' directed and thus is connected, while the other longitudinal edge of the gutter forming a gas passage gap 16 with parallel distance to the underside of the plate 6''a.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)
  • Furnace Details (AREA)
  • Baking, Grill, Roasting (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Claims (26)

  1. Plaque de grille conçue pour être intégrée dans un dispositif à grilles assurant l'échange thermique entre une matière en vrac et un gaz de traitement, notamment pour être fixée sur un support (2) de plaques de grilles dans un refroidisseur à grilles, comprenant
    a) un corps de base (4) muni d'une structure extérieure d'encadrement (5), et
    b) une plaque (6, 6', 6") de support de matière, fixée au bord supérieur (5a) de cette structure d'encadrement, et sur laquelle sont ménagés des canaux (7, 7'') de circulation gazeuse, ininterrompus depuis sa face inférieure (6a, 6''a) jusqu'à la face supérieure (6b, 6''b) de ladite plaque,
    caractérisée par le fait
    que la plaque (6, 6', 6'') de support de matière est fabriquée à partir d'un matériau en plaques d'acier laminé soumis à traitement ultérieur de haute résistance à l'usure, et les canaux (7, 7") de circulation gazeuse - considérés en coupe longitudinale verticale passant par la plaque de support de matière - sont pratiqués, dans cette plaque de support de matière, de manière à s'étendre pour l'essentiel en ligne droite et à l'oblique dans la direction du convoyage (3).
  2. Plaque de grille selon la revendication 1, caractérisée par le fait que le corps de base (4) de ladite plaque présente, à l'intérieur de sa structure extérieure d'encadrement (5), un châssis de soutien (13) qui assure la solidarisation mutuelle rigide de parties latérales parallèles d'encadrement (5b, 5c), et consiste en des éléments de rigidification (14, 14", 15) sur lesquels la plaque (6, 6', 6") de support de matière prend appui, et est au moins partiellement fixée ; par le fait que, en outre, les éléments de rigidification du châssis de soutien (13) sont réalisés, au moins en partie, sous la forme de nervures d'appui (14, 14'') agencées à des distances parallèles les unes des autres, s'étendant, dans la direction transversale de la plaque, entre les parties longitudinales (5b, 5c) de la structure extérieure d'encadrement (5), et munies d'une section transversale en forme de rigole aplatie ouverte vers le haut, sachant que l'un (14a) des bords longitudinaux de la rigole de chaque nervure d'appui (14, 14'') est orienté en direction de la face inférieure (6a, 6''a) de la plaque (6, 6', 6'') de support de matière et est relié à cette face inférieure, tandis que l'autre bord longitudinal (14b) de la rigole s'étend parallèlement à distance de la face inférieure de la plaque, en réservant un interstice (16) de circulation gazeuse ; et par le fait que les canaux (7, 7'') de circulation gazeuse s'étendent, dans la plaque de support de matière, en forme de fentes et à peu près parallèlement aux nervures d'appui (14, 14''), en débouchant à chaque fois, à la face inférieure de la plaque, au-dessus de la section transversale en rigole de la nervure d'appui sous-jacente.
  3. Plaque de grille selon la revendication 2, caractérisée par le fait que les nervures d'appui (14, 14'') forment, par leurs sections transversales en rigoles relativement aplaties, des prolongements situés aux faces inférieures des canaux sus-jacents (7, 7") de circulation gazeuse, de façon telle que chaque canal de circulation gazeuse possède globalement - considéré en coupe longitudinale verticale passant par la plaque de grille (1, 1'') -, une configuration sensiblement en zigzag et dans ce cas, pour l'essentiel, une configuration s'étendant globalement à l'oblique.
  4. Plaque de grille selon la revendication 2, caractérisée par le fait que plusieurs canaux (7) de circulation gazeuse, revêtant la forme de fentes pour l'essentiel de taille identique, sont agencés en une rangée transversale transversalement à la direction (3) de convoyage de la matière, et plusieurs rangées transversales de ce genre sont agencées en succession avec des espacements identiques dans la direction longitudinale de la plaque, au moins sur le tronçon longitudinal antérieur de la plaque (6, 6') de support de matière - en considérant dans la direction du convoyage de la matière -.
  5. Plaque de grille selon la revendication 4, caractérisée par le fait que, dans les nervures d'appui (14) en forme de rigoles, plusieurs membrures verticales de rigidification (15) reliant fermement les unes aux autres des nervures d'appui voisines et s'étendant dans la direction longitudinale de la plaque, jusqu'à la face inférieure (6a) de la plaque (6, 6') de support de matière, sont implantées rigidement, avec répartition dans la direction transversale de la plaque, de façon telle que le châssis de soutien (13) soit de réalisation sensiblement alvéolaire, et ces membrures de rigidification (15) offrent un appui à la plaque de support de matière dans des zones situées entre des canaux (7) de circulation gazeuse voisins les uns des autres dans la direction transversale de la plaque, et sont reliées rigidement à la face inférieure (6a) de la plaque, au moins en partie, de préférence par soudage.
  6. Plaque de grille selon la revendication 5, caractérisée par le fait que les canaux (7) de circulation gazeuse sont respectivement agencés avec décalage mutuel en quinconce dans les rangées de canaux mutuellement voisines, s'étendant transversalement, et le châssis de soutien (13) présente, en vue d'une adaptation à cet agencement, une structure alvéolaire à alvéoles rectangulaires décalés les uns des autres dans des rangées transversales, et constitués de nervures d'appui (14) et de membrures de rigidification (15) reliées fermement les unes aux autres.
  7. Plaque de grille selon la revendication 2, caractérisée par le fait que sont prévus, au moins sur le tronçon longitudinal antérieur de la plaque (6'') de support de matière - en considérant dans la direction (3) du convoyage de la matière -, plusieurs canaux (7'') de circulation gazeuse qui revêtent la forme de fentes pour l'essentiel de même taille, s'étendent à chaque fois d'un trait transversalement à la direction (3) du convoyage de la matière, entre les deux parties latérales d'encadrement (5b, 5c) et sont agencés en succession à intervalles égaux, dans la direction longitudinale de la plaque, ainsi que parallèlement les uns aux autres.
  8. Plaque de grille selon la revendication 7, caractérisée par le fait que, dans les nervures d'appui (14'') en forme de rigoles, plusieurs membrures verticales de rigidification (15), reliant fermement les unes aux autres des nervures d'appui voisines et s'étendant dans la direction longitudinale de la plaque, jusqu'à la face inférieure (6"a) de la plaque (6") de support de matière, sont implantées rigidement, avec répartition dans la direction transversale de la plaque, de façon telle que le châssis de soutien (13) soit de réalisation sensiblement alvéolaire, cette structure alvéolaire comprenant des alvéoles rectangulaires qui sont, de préférence, respectivement décalés les uns des autres dans des rangées transversales voisines, et sont constitués de nervures d'appui (14'') et de membrures de rigidification (15) reliées rigidement les unes aux autres.
  9. Plaque de grille selon la revendication 2, caractérisée par le fait que la section transversale en rigole de chaque nervure d'appui (14) est sensiblement réalisée sous la forme d'un angle scalène, sachant que la branche plus courte (14a) de la nervure, orientée dans la direction (3) du convoyage de la matière, est reliée à la face inférieure (6a) de la plaque, que la branche plus longue (14b) de ladite rainure, décrivant un angle aigu relativement aplati, monte avec inclinaison vers l'arrière en direction de la face inférieure (6a) de la plaque - en considérant dans la direction (3) du convoyage de la matière -, et que les deux branches (14a, 14b) de la nervure sont directement reliées l'une à l'autre par l'intermédiaire d'une zone culminante (14c) à courbure en arc de cercle.
  10. Plaque de grille selon la revendication 2, caractérisée par le fait que chaque nervure d'appui (14'') présente une section transversale en rigole accusant un fléchissement vers le bas sensiblement en forme d'arc de cercle aplati ; et par le fait qu'un élément respectif de rétrécissement (21) du type bourrelet, s'étendant à distance au-dessus de chaque section transversale en rigole, ainsi que parallèlement à la nervure d'appui (14''), fait saillie vers le bas en direction de cette section transversale en rigole, à partir de la face inférieure (6''a) de la plaque (6") de support de matière, de telle sorte qu'il forme un segment inférieur de canalisation (7''a) conjointement à la nervure d'appui (14'') associée.
  11. Plaque de grille selon la revendication 2, caractérisée par le fait que le corps de base (4) de ladite plaque est fabriqué en tant que corps monobloc venu de coulée, de préférence en de la fonte d'acier, avec sa structure d'encadrement (5), le châssis de soutien (13) ménagé dans cette dernière, et un appendice (10) destiné à la fixation sur un support (2) de plaques de grilles.
  12. Plaque de grille selon la revendication 11, caractérisée par le fait que la partie antérieure de ladite plaque de grille (1), orientée dans la direction (3) de convoyage de la matière, est délimitée vers le bas par une plaque de fond (12) qui est disposée à distance au-dessous du châssis de soutien (13) et présente une arête postérieure de solidarisation (12a) en vue de la liaison par concordance de formes avec un support (2) de plaques de grilles, ainsi que, de préférence, un couvercle obturateur (20) distinct.
  13. Plaque de grille selon la revendication 1, caractérisée par le fait que les canaux (7) de circulation gazeuse - considérés en coupe longitudinale verticale passant par la plaque (6, 6'') de support de matière - possèdent une largeur intérieure de fente (W) constante depuis la face inférieure (6a) de la plaque jusqu'à la face supérieure (6b) de ladite plaque.
  14. Plaque de grille selon la revendication 1, caractérisée par le fait que les canaux (7'') de circulation gazeuse - considérés en coupe longitudinale verticale passant par la plaque (6") de support de matière - sont réalisés munis d'une largeur intérieure de fente (W'') se rétrécissant, pour l'essentiel, de manière uniforme depuis la face inférieure (6"a) de la plaque jusqu'à la face supérieure (6"b) de ladite plaque.
  15. Plaque de grille selon la revendication 1, caractérisée par le fait que la plaque (6, 6') de support de matière est fabriquée à partir d'un matériau composite en plaques courant dans le commerce, dans lequel au moins la couche supérieure, entrant en contact avec une matière à traiter, est soumise à un traitement ultérieur de haute résistance à l'usure.
  16. Plaque de grille selon la revendication 15, caractérisée par le fait que la couche supérieure (6.2) du matériau composite en plaques est formée d'une couche soudée en un revêtement dur.
  17. Plaque de grille selon la revendication 1, caractérisée par le fait que la plaque (6, 6') de support de matière est fabriquée à partir d'un matériau en plaques d'acier laminé, courant dans le commerce, rendu hautement résistant à l'usure par trempe ultérieure.
  18. Plaque de grille selon la revendication 1, caractérisée par le fait que - en considérant dans la direction (3) de convoyage de la matière - la partie frontale antérieure (5e) de la structure d'encadrement (5) possède une arête inférieure d'usure (18) en un matériau en plaques d'acier laminé de type similaire, hautement résistant à l'usure.
  19. Procédé pour la fabrication d'une plaque de grille conçue pour être intégrée dans un dispositif à grilles, en vue de l'échange thermique entre une matière en vrac et un gaz de traitement, notamment pour l'intégration dans un refroidisseur à grilles, sachant que des canaux de circulation gazeuse sont pratiqués dans une plaque de support de matière, de manière ininterrompue depuis sa face inférieure jusqu'à la face supérieure de ladite plaque, et que la plaque de support de matière est fixée sur le bord supérieur d'une structure extérieure d'encadrement d'un corps de base de la plaque,
    caractérisé par le fait que
    a) pour constituer la plaque de support de matière, l'on utilise un matériau en plaques d'acier laminé soumis à traitement ultérieur de haute résistance à l'usure, et
    b) les canaux de circulation gazeuse sont pratiqués dans la plaque de support de matière par un procédé de sectionnement à haute énergie, en s'étendant sous la forme de fentes dans la direction transversale de la plaque.
  20. Procédé selon la revendication 19, caractérisé par le fait qu'on utilise, en tant que matériau en plaques d'acier laminé, des plaques d'acier composite hautement résistantes à l'usure, courantes dans le commerce, dans lesquelles au moins une couche supérieure extrême est soumise à trempe ultérieure pour résister particulièrement bien à l'usure, ou est formée d'une couche de revêtement dur déposée par soudage, et présente une dureté de 58 à 68 HRC (dureté selon Rockwell).
  21. Procédé selon la revendication 19, caractérisé par le fait qu'on applique, en tant que procédé de sectionnement à haute énergie pour pratiquer les canaux de circulation gazeuse dans la plaque de support de matière, un procédé de brûlage au plasma, un procédé de brûlage au laser, un procédé de coupe par substances abrasives et projection d'eau sous haute énergie, voire un autre procédé de sectionnement similaire à haute énergie.
  22. Procédé selon la revendication 19, caractérisé par le fait que les canaux de circulation gazeuse - considérés en coupe longitudinale verticale passant par la plaque de support de matière - sont pratiqués, dans la plaque de support de matière, en s'étendant pour l'essentiel rectilignement et obliquement dans la direction de convoyage de la matière, ce qui leur confère une largeur de fente pour l'essentiel constante depuis la face inférieure de la plaque jusqu'à la face supérieure de ladite plaque, ou se rétrécissant pour l'essentiel uniformément.
  23. Procédé selon la revendication 19, caractérisé par le fait que plusieurs rangées transversales parallèles de canaux de circulation gazeuse sont pratiquées dans la direction longitudinale de la plaque, au moins sur un tronçon longitudinal antérieur de la plaque de support de matière - en considérant dans la direction de convoyage de la matière -, et plusieurs canaux de circulation gazeuse de taille identique sont pratiqués dans chaque rangée transversale.
  24. Procédé selon la revendication 19, caractérisé par le fait que les canaux de circulation gazeuse - considérés dans la direction de convoyage de la matière - sont pratiqués au moins sur le tronçon longitudinal antérieur de la plaque de support de matière et, dans ce cas, plusieurs canaux de circulation gazeuse à étendue transversale, s'étendant pour l'essentiel en forme de fentes ininterrompues entre des parties latérales extérieures d'encadrement, sont agencés dans la direction longitudinale de la plaque et en succession mutuelle à intervalles égaux.
  25. Procédé selon la revendication 19, caractérisé par le fait qu'un châssis de soutien, ménagé à l'intérieur de la structure extérieure d'encadrement du corps de base de la plaque, est constitué par des éléments de rigidification sur lesquels la plaque de support de matière prend appui et est fixée au moins partiellement.
  26. Procédé selon la revendication 25, caractérisé par le fait que le corps de base (4) de la plaque est un corps venu de coulée d'une seule pièce, de préférence en fonte d'acier allié, avec sa structure d'encadrement (5), le châssis de soutien (13) et au moins un appendice de fixation (10), sachant que ledit châssis de soutien est réalisé à partir d'éléments de rigidification revêtant, d'une part, la forme de nervures d'appui (14) et, d'autre part, la forme de membrures de rigidification (15), parmi lesquelles les nervures d'appui, s'étendant à des distances mutuellement parallèles dans la direction transversale de la plaque, relient rigidement l'une à l'autre les deux parties longitudinales (5b, 5c) de la structure d'encadrement (5), et sont configurées avec des sections transversales en rigoles aplaties dans lesquelles débouchent les canaux sus-jacents (7) de circulation gazeuse, tandis que les membrures de rigidification (15), s'étendant dans la direction longitudinale de la plaque, subdivisent les nervures d'appui en forme de rigoles dans la direction transversale de la plaque, et relient rigidement les unes aux autres des nervures d'appui mutuellement voisines, en vue d'obtenir une structure d'ensemble sensiblement alvéolaire du châssis de soutien sur lequel la plaque de support (6, 6') prend appui sensiblement en forme de quadrillage, et est fixée - de préférence par des zones soudées -.
EP97107556A 1996-06-05 1997-05-07 Plaque de grille et procédé pour sa fabrication Expired - Lifetime EP0811818B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19622636A DE19622636A1 (de) 1996-06-05 1996-06-05 Rostplatte sowie Verfahren zur Herstellung einer Rostplatte
DE19622636 1996-06-05

Publications (3)

Publication Number Publication Date
EP0811818A1 EP0811818A1 (fr) 1997-12-10
EP0811818B1 true EP0811818B1 (fr) 2001-08-16
EP0811818B2 EP0811818B2 (fr) 2007-11-21

Family

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EP97107556A Expired - Lifetime EP0811818B2 (fr) 1996-06-05 1997-05-07 Plaque de grille et procédé pour sa fabrication

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US (2) US5947719A (fr)
EP (1) EP0811818B2 (fr)
DE (2) DE19622636A1 (fr)
DK (1) DK0811818T4 (fr)
ES (1) ES2161395T5 (fr)
ZA (1) ZA974141B (fr)

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Also Published As

Publication number Publication date
EP0811818B2 (fr) 2007-11-21
DE19622636A1 (de) 1997-12-11
US5947719A (en) 1999-09-07
DK0811818T3 (da) 2001-11-12
DK0811818T4 (da) 2008-04-14
ZA974141B (en) 1997-12-09
ES2161395T5 (es) 2008-03-16
ES2161395T3 (es) 2001-12-01
US6266883B1 (en) 2001-07-31
EP0811818A1 (fr) 1997-12-10
DE59704275D1 (de) 2001-09-20

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