EP2381174B1 - Elément de revêtement pour des pièces constitutives d'incinérateurs - Google Patents

Elément de revêtement pour des pièces constitutives d'incinérateurs Download PDF

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Publication number
EP2381174B1
EP2381174B1 EP10191539.5A EP10191539A EP2381174B1 EP 2381174 B1 EP2381174 B1 EP 2381174B1 EP 10191539 A EP10191539 A EP 10191539A EP 2381174 B1 EP2381174 B1 EP 2381174B1
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EP
European Patent Office
Prior art keywords
cladding element
element according
cladding
channel
grate
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.)
Active
Application number
EP10191539.5A
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German (de)
English (en)
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EP2381174A1 (fr
Inventor
Marco Bachmann
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.)
Ice Industrial Contractors And Engineers AG
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MB Wasserstrahlschneidetechnik AG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H3/00—Grates with hollow bars
    • F23H3/02—Grates with hollow bars internally cooled

Definitions

  • the invention relates to a cladding element for device parts of incinerators according to claim 1.
  • the invention relates in particular to a cladding element for device parts of incinerators which consists of a lower plate made of steel and a top plate made of steel, which are superimposed and which are tightly interconnected at least in edge regions and wherein between the lower plate and the top plate a meandering channel for guiding a cooling medium the cladding element is formed.
  • Apparatus parts of incinerators are usually exposed to very high loads. These are thermal, chemical and mechanical loads, often of course also combinations thereof. Since waste incinerators usually also push grates are used on which the combustion material is mechanically conveyed into the combustion chamber, here are particularly strong abrasive loads too expect, which are further enhanced by the softening of the metal parts due to the high temperatures. For this reason, in such pushrods the most vulnerable moving parts, namely the grate plates of the individual grate stages, usually designed as medium-cooled hollow body. As a coolant, water is usually used. Cooling achieves a reduction in mechanical wear as a result of abrasion and ultimately, of course, reduced maintenance, since the metal parts exposed to wear have to be replaced less often.
  • the EP-0 621 449 shows a method for burning garbage on a combustion grate and a usable combustion grate.
  • the individual grate plates of the combustion grate have the external shape of a board, which is made of sheet metal and forms a hollow body with a top and a bottom. This hollow body is made of either two half-shells or a hollow profile. On the one side of the bottom there is a connecting piece and on the other side of the bottom it has a discharge pipe for the supply and removal of a cooling medium, which flows through the hollow body.
  • the grate plate also extends in its longitudinal direction over the entire width of the combustion grate. Inside the grate plate baffles may be welded in a way that a labyrinthine meandering channel for the cooling medium results.
  • Hardox wear plates are steel alloys that also contain manganese and in which the strength properties of the delivery state after heating above a certain temperature limit, for example about 250 ° C, are not accessible again.
  • the intended thickness of such wear plates is about 5 to 10 mm.
  • EP-1 321 711 shows an air-cooled grate bar for a grate firing. Although it is also a two-plate construction with a top plate and a bottom plate, but between these two plates there is not a meandering channel, but only a cooling gap.
  • the grate bar is designed as a casting. It is therefore also a conventional solution with the disadvantages of a high weight and an undifferentiated cooling air distribution, because the cooling air namely flows through the cooling gap only in the longitudinal direction of the grate bar.
  • the disclosed wall element may consist, for example, of a metal plate and metal tube half-shells welded thereto, with a copper layer of high thermal conductivity being applied to the inside of the metal on the metal plate.
  • This copper layer can be applied by means of welding plating.
  • the basic element structure does not include two continuously superimposed metal plates, but instead of the one plate a plurality of individual metal tube half-shells. It is therefore about a very expensive to produce component, which is also due to the completely different application in metallurgical furnaces also not provided with a particularly wear-resistant, but only a good thermal conductivity inner coating.
  • a grate bar having a lower plate and a top plate made of high-alloy cast material and a lying between the lower and the upper plate milled and meandering channel.
  • meandering channel cooling tubes are inserted.
  • the two plates are connected by screw connections, which are not arranged in edge areas.
  • the channel is designed to guide a cooling medium either in the top plate or the bottom plate as a meandering milling
  • the course and cross section of the site and the conditions of use can be designed to be flexible, which is greatly facilitated with the numerically controlled machining methods commonly used today.
  • the numerically controlled machining methods commonly used today thus one achieves also an additional flexibility in the production.
  • weld-plating is a process known per se, which is also called 'cladding' or build-up welding.
  • a high-alloy steel is applied as a surface protection on highly loaded, but usually lower alloyed metallic base materials. Such an order can be done for example by means of a welding robot.
  • the base material which is sweat-plated, receives a usually several mm thick application layer.
  • the high-alloyed steel used for this coating layer is selected according to the stress requirements (hardness, chemical resistance, etc.).
  • coating or protective layers are, inter alia, Inconel od. A-major 600.
  • Such welding plating have the advantage that they with appropriate selection and especially if additional cooling is present, which ensures that the softening of the material due to the influence of temperature as small as possible is held, have much better abrasion resistance as the previously used Hardox sheets.
  • the emergency running properties are greatly improved. Short-term exceedances of temperature limits to be observed so far no longer necessarily cause a permanent and irreversible weakening of the abrasion resistance of the affected material parts. It is even possible that in less critical areas, cooling no longer needs to be sustained or even eliminated altogether.
  • cladding elements with the described structure can be produced efficiently and in series, it is much easier and easier to design as easy to handle spare parts.
  • inventive cladding elements with connecting means with which they can be easily and quickly attached to a support provided for the substructure or other parts of a waste incineration and attachable again.
  • These connecting means may be, for example, screw, plug or suspension means.
  • the individual cladding elements weigh at most about 40 - 50kg, so is also readily apparent that this requirement in the intended scope most likely with a for the rational Mass production can meet suitable object, because the parts are then usually required in larger quantities.
  • this also implies, of course, that the cooling medium connections also meet the condition of easy attachment and removability. However, this can usually be done well, for example with screw-threaded sockets for the cooling line connections.
  • an occupancy schedule for an incinerator may cover a whole range of differently shaped
  • the individual embodiments are of course adapted to the naturally occurring environmental conditions of course. It is thus easy to see that, for example, conditions prevail in a feed chute with different conditions than in the actual combustion zone. Nevertheless, inventive cladding elements can also be used here.
  • the cladding elements can also be built or built into existing components.
  • a cladding element according to the invention is first produced as a flat article and only then brought into the desired final shape by bending.
  • the cladding element is not too thick, because otherwise the machining forces or the processing machines required for this purpose become much too large. It is believed that this is well possible for plate thicknesses of up to about 20 mm.
  • the lower plate and the upper plate are manufactured separately as sub-objects which are bent in mutually matching form and are subsequently connected to one another. In this way can be made paneling elements with greater wall thickness.
  • the milled first runs exactly at those points where then the subsequent turn occurs (because the turn at the thinner, milled places is of course relieved).
  • cladding elements according to the invention can easily be produced with overall wall thicknesses of up to about 50 mm.
  • the FIG. 1 shows a flat cladding element according to the invention for device parts of incinerators in a view from below, a cross section and a view from above.
  • the cladding element has a lower plate 1 made of steel and a top plate 2 made of steel, which are superimposed and between where a channel 3 is designed to guide a cooling medium through the cladding element.
  • the channel 3 is incorporated as a meandering milled 4 in the top plate 2.
  • the top plate 2 has on the side facing away from the bottom plate 1 on a welding cladding 5.
  • the welding cladding 5 is, as mentioned above, a hard application layer of particularly high abrasion resistance, for example, by means of robot welding. Other properties, such as high temperature resistance, high corrosion resistance, etc.
  • This application layer usually has a total layer thickness of several mm.
  • a multi-layered structure of the application layer is often desirable and advantageous, because it enables physical properties of the hard application material to be realized more reliably.
  • the weld clad 5 is in the top view (see lower part of the FIG. 1 ) is displayed as a scale-like pattern in the absence of any other suitable representation.
  • the lower plate 1 and the upper plate 2 are at least in the edge regions sealed together (not shown). This achieves the required tightness for the meandering channel 3 by flowing cooling medium.
  • the lower plate 1 may be connected at other locations, for example by means of welding connection with the top plate 2.
  • This is in the FIG. 1 shown with additional welds 6, in the present embodiment
  • FIG. 1 two welded in the lower plate 1 threaded sleeves 7, via which an inlet and outlet of the cooling medium can take place.
  • These threaded sleeves allow pipelines, for example for cooling water, to be quickly and easily connected.
  • the simple embodiment according to the FIG. 1 also shows that the meandering channel 3 between inlet and outlet has a non-narrowing cross-section.
  • the meandering channel 3 also has a number of approximately over the entire length and a number of approximately over the entire width of the cladding element extending channel sections. With these measures, the best possible heat distribution within the cladding element should be achieved.
  • FIG. 2 shows the top plate 2 for a cladding element FIG. 1 still in a view from below.
  • FIG. 3 shows the bottom plate 1 for a cladding element FIG. 1 still in a view from below.
  • the cladding element For fastening the cladding element to a dedicated substructure or other device parts of the incinerator, the cladding element has connecting means with which it can be easily and quickly attached to a holder provided for this purpose.
  • These connecting means may be formed in a manner known to those skilled, for example, as a screw, plug or suspension means. Since these are known design aids, they are not shown here.
  • the cladding element can also have through holes, passage slots or ducts for the passage of combustion air (see Fig. 8 ).
  • the cladding element can also have through holes, passage slots or ducts for the passage of combustion air (see Fig. 8 ).
  • FIGS. 5, 6 and 7 show for further clarification cladding elements of embodiments F, D and K. Clearly visible is the same basic structure with a lower plate 1 and a top plate 2 in all embodiments.
  • FIG. 8 shows a trim element according to the invention in a version K for a rust level of a sliding grate on a substructure.
  • Waste incinerators have, as in the FIG. 4 schematically shown, usually stair-like feed grids on which the kiln is transported into the combustion area and ash and slag from the combustion area in a slag shaft.
  • Such a feed grate consists of juxtaposed grate steps.
  • at least a number of the grate stages can perform lifting movements in the transport direction.
  • the rust levels are heavily loaded, especially in the combustion area, which is why the easy substitution is of great importance here.
  • the substructure for a rust stage is a push frame 10.
  • On this push frame 10 is an angled Cladding element for the occupation of the grate level by means of screws 11 screwed.
  • the cooling medium connection 12 is screwed onto the threaded sleeve 7.
  • a sealing strip 14 is attached.
  • the karnel shame shaping 15 serves to support and positioning of the grate level on a round rod (not shown) of the sliding grate construction.
  • In the end face area there are also through holes 16 for the supply of combustion air in this embodiment.
  • a cladding element according to the invention is first produced as a flat object and only then brought into the desired final shape by bending. This method is, as already stated, because of applied bending forces applicable only for relatively thin trim elements.
  • the lower plate 1 and the upper plate 2 can be manufactured separately as sub-objects which are bent in mutually matching form and only subsequently can be connected to one another. In this way, lining elements can be produced with greater wall thicknesses.
  • FIG. 9 a top plate 2 in cross-section with Operaeinfräsungen 20.
  • This top plate 2 is a separate part of the article can be produced.
  • the entirety of the Operaeinfräsungen 20 forms the channel 3.
  • the sectioneinfräsung 20a which is also part of the channel 3, runs continuously from edge to edge and is located at the point where the turn (indicated by dashed lines).
  • the top plate 2 can be bent at a position where the turn is due to the smaller plate thickness is relieved.
  • Prior to assembly with the lower plate of course in order to produce the integrity of the meandering channel at the 'intentionally' milled places again corresponding channel wall parts must be welded in such cases. These additions are needed at least in the edge regions of the cladding element, but of course it depends on the intended course of the channel 3.
  • FIG. 10 shows a corresponding lower plate 1 in cross section.
  • This sub-plate 1 can be produced as a separate sub-item.
  • This sub-plate 1 fits to the top plate according to Fig. 9 and it is also bent at the corresponding point (indicated by dashed lines). After bending, the top plate can Fig. 9 and the lower plate after Fig. 10 be joined together to form a cladding element, or, for example, connected to each other by means of welding.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)

Claims (8)

  1. Élément d'habillage pour des pièces de dispositif de fours de combustion, dans lequel l'élément d'habillage est composé d'une plaque inférieure (1) en acier et d'une plaque supérieure (2) en acier qui reposent l'une sur l'autre et sont reliées en étanchéité l'une avec l'autre au moins dans des parties de bord et sachant qu'un canal sinueux (3) est formé entre la plaque inférieure (1) et la plaque supérieure (2) pour amener un fluide de refroidissement à travers l'élément d'habillage, et sachant que
    la face supérieure (2) ou la face inférieure (1) est respectivement une tôle fraisée individuelle avec un fraisage (4) sinueux qui forme le canal (3), caractérisé en ce que
    la plaque supérieure (2) présente, sur le côté détourné de la plaque inférieure (1), un placage soudé (5) résistant à l'abrasion et l'élément d'habillage en globalité peut être fabriqué en tant qu'objet plat et peut ensuite être cintré dans une forme.
  2. Élément d'habillage selon la revendication 1, caractérisé en ce que le placage soudé (5) présente une capacité de résistance accrue en regard des contraintes thermiques et/ou chimiques et/ou abrasives.
  3. Élément d'habillage selon la revendication 1 à 2, caractérisé en ce que le placage soudé (5) a plusieurs couches.
  4. Élément d'habillage selon l'une des revendications 1 à 3, caractérisé en ce que l'élément d'habillage présente des moyens de liaison avec lesquels il peut être facilement et rapidement placé sur une sous-construction prévue pour fixer l'élément d'habillage ou d'autres parties de dispositif du four de combustion.
  5. Élément d'habillage selon la revendication 4, caractérisé en ce que les moyens de liaison sont des moyens de vissage, d'enfichage ou d'accrochage.
  6. Élément d'habillage selon l'une des revendications 1 à 5, caractérisé en ce que l'élément d'habillage présente des trous traversants (17), des fentes traversantes ou des percées pour le passage d'air de combustion ou pour placer des moyens de fixation.
  7. Élément d'habillage selon l'une des revendications 1 à 6, caractérisé en ce que le canal sinueux (3) présente une section transversale qui ne se resserre pas.
  8. Élément d'habillage selon l'une des revendications 1 à 7, caractérisé en ce que le canal sinueux (3) présente un nombre de tronçons de canal s'étendant essentiellement sur toute une longueur et un nombre de tronçons de canal s'étendant essentiellement sur toute une largeur de l'élément d'habillage.
EP10191539.5A 2010-04-21 2010-11-17 Elément de revêtement pour des pièces constitutives d'incinérateurs Active EP2381174B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00575/10A CH703063A1 (de) 2010-04-21 2010-04-21 Verkleidungselement für Vorrichtungsteile von Verbrennungsöfen.

Publications (2)

Publication Number Publication Date
EP2381174A1 EP2381174A1 (fr) 2011-10-26
EP2381174B1 true EP2381174B1 (fr) 2015-04-08

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US (1) US8661994B2 (fr)
EP (1) EP2381174B1 (fr)
JP (1) JP2011237166A (fr)
CH (1) CH703063A1 (fr)

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JP6207055B2 (ja) * 2013-05-27 2017-10-04 株式会社タクマ 水冷式ストーカの水冷火格子
ES2611178T5 (es) † 2013-12-06 2020-08-07 Hitachi Zosen Inova Ag Dispositivo de alimentación de basura
DE102015101356A1 (de) * 2015-01-30 2016-08-04 Standardkessel Baumgarte Service GmbH Roststab mit Kühlmittel-Kanal
CH713352A1 (de) * 2017-01-12 2018-07-13 I C E Ag Rostblock für einen Rost einer Verbrennungsanlage.
DE102019108342A1 (de) * 2019-03-29 2020-10-01 EURODUR GmbH Rostplatte für einen Schubrostofen
CN110207132B (zh) * 2019-07-05 2024-08-20 重庆三峰卡万塔环境产业有限公司 一种往复运动机械逆推炉排的隔墙铸件组合
SE1951417A1 (en) * 2019-12-09 2021-06-10 Flamma Systems Sverige Ab An incinerator with a firing grate and a method of operating such an incinerator

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JPH074634A (ja) * 1993-06-17 1995-01-10 Hitachi Zosen Corp ごみ焼却炉の火格子
EP1355112A1 (fr) * 2002-04-17 2003-10-22 Seghers Keppel Technology Group Barreau de grille d'incinérateur, méthode pour son refroidissement et procédé pour sa fabrication

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JPH074634A (ja) * 1993-06-17 1995-01-10 Hitachi Zosen Corp ごみ焼却炉の火格子
EP1355112A1 (fr) * 2002-04-17 2003-10-22 Seghers Keppel Technology Group Barreau de grille d'incinérateur, méthode pour son refroidissement et procédé pour sa fabrication

Also Published As

Publication number Publication date
JP2011237166A (ja) 2011-11-24
EP2381174A1 (fr) 2011-10-26
US20110259252A1 (en) 2011-10-27
US8661994B2 (en) 2014-03-04
CH703063A1 (de) 2011-10-31

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