EP0396908B1 - Grate bar and rotary grate - Google Patents
Grate bar and rotary grate Download PDFInfo
- Publication number
- EP0396908B1 EP0396908B1 EP90106560A EP90106560A EP0396908B1 EP 0396908 B1 EP0396908 B1 EP 0396908B1 EP 90106560 A EP90106560 A EP 90106560A EP 90106560 A EP90106560 A EP 90106560A EP 0396908 B1 EP0396908 B1 EP 0396908B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grate
- bar
- accordance
- roller
- angle
- 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
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H9/00—Revolving-grates; Rocking or shaking grates
- F23H9/02—Revolving cylindrical grates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H17/00—Details of grates
- F23H17/12—Fire-bars
Definitions
- the invention relates to a grate roller according to the preamble of patent claim 1.
- Each grate bar consists of a head and a base web and has a substantially T-shaped cross section.
- the head is provided with a series of narrow indentations on the long sides, the bottom of which is chamfered from the top of the head to a side surface.
- the side surface of the grate bar head is provided with groove-like incisions which start from the underside of the head and end at a height which is clearly above the lower roof edges of the adjacent notches.
- the notches and grooves of the two grate bar sides are offset from one another, so that on the abutting sides of two adjacent grate bars the notches of one grate bar are aligned with the grooves of the other grate bar.
- the grooves form air channels which extend upwards from the underside of the grate bar head and have a lateral opening approximately halfway above the lower roof edge of the corresponding notch of the adjacent grate bar, so that an emerging air jet is directed obliquely upwards.
- the staggered arrangement alternately directs the air jets to one side and the other. This creates a defined vortex movement that causes good air distribution.
- the grate is particularly suitable for a fuel bed with a low layer height, e.g. 1''.
- a grate bar known from GB-A-601 599 also consisting of a base web and head, is divided into three sections in the longitudinal direction. In the middle section the head is inclined to one long side, in the two end sections to the other side. The end sections are to the middle section laterally offset, so that when the grate bars are next to each other, the heads alternately overlap in sections in the edge areas. In the areas of overlap there are narrow, sloping gaps from which air jets alternately emerge towards one side and towards the other in operation.
- the grate is suitable for fine-grain anthracite coal and the like and is intended to ensure an even draft.
- DE 33 16 363 A1 describes a grate roller whose grate bars have a T-like symmetrical cross section.
- the grate bars are attached to the supports with little play, so that they - due to the rotation of the roller - perform small relative movements during operation. Apart from these small movements, their position is invariable relative to the supporting structure.
- the air slots which determine the direction of the emerging air jets, are aligned perpendicular to the roller surface.
- the invention has for its object to avoid the problems noted in foldable grate bars in a grate roller according to the preamble of claim 1, without foregoing the advantage of the inclined air slots.
- Claim 2 gives the approximate limits of the range in which the oblique angle can be varied.
- Claim 4 relates to an advantageous feature.
- a tilting of the grate bars is counteracted by the feature of claim 5.
- the grate roller which can be seen in FIG. 1 has a support structure which essentially consists of a hollow shaft 1, radial connecting elements 2 and a plurality of T-beams 3 which are parallel to the axis of the hollow shaft.
- the carrier 3 are fastened to the hollow shaft 1 by the connecting elements 2 and together form a cylindrical cage.
- This support structure is provided with a jacket covering, which consists of numerous circular-arc-shaped grate bars 4 fastened to the supports 3. Between the long sides Adjacent grate bars are air slots 5 which run in the circumferential direction of the grate roller.
- a typical grate roller is 5 m long and 1.5 m in diameter.
- Each grate bar 4 extends over a circular arc of 36 °, so that a total of ten grate bars form a closed ring.
- the cladding comprises a hundred such rings, i.e. it consists of a total of a thousand grate bars.
- the width of the louvers is about 2 mm.
- Each grate bar 4 has a head 6 and a base web 7 which tapers downwards (for the sake of simplicity, the point further away from the lateral surface in the direction of the roller axis is referred to as "below” here and below).
- the head 6 is delimited by a cylindrically curved, smooth outer surface and two likewise smooth side surfaces, which are practically flat, but in principle are slightly conical, as will become apparent from the following.
- the lateral surface corresponds to the lateral line 9 in cross-section, the lateral lines 10, 11 to the lateral surfaces.
- the lateral line 10 forms an angle ⁇ of 60 ° with the lateral line.
- the angle ⁇ between the surface line 9 and the side line 11 is 120 °.
- the side lines 10, 11 are therefore parallel to one another.
- the center line 13 of the base web 7 divides this oblique-angled parallelogram into two parts of approximately the same size.
- the center line 13 divides the surface line 9, which is perpendicular to it, in a ratio dependent on the angle ⁇ , which is between 1.6 and 1.7 in the exemplary embodiment shown.
- the angle ⁇ can range are between about 45 and 75 °.
- the angle ⁇ can be in a corresponding range, so that the sum of the two angles is between 170 and 180 °. If the sum of the two angles is less than 180 °, ie if the side lines 10, 11 are not exactly parallel, then this means that the air slot 5 between adjacent grate bars 4 narrows like a nozzle towards the roller surface.
- the side line 10 continues in a straight line below the line 12 and merges into the boundary line of the base web 7 in the form of an arc.
- the cross section of the head 6 is delimited on the underside by an arc 14, the end point of which is connected to the end point of line 11 by a short line 15, which includes an angle of approximately 45 ° with line 12.
- the base web 7 is symmetrical to the line 13. It is considerably narrower than the head 6. Its width in the lower region is approximately 1: 6 to the distance between the center lines 13 of two adjacent grate bars 4, as can be seen, for example, from FIG.
- Several cooling fins 16 are attached to the side of the base web 7.
- the grate bar In the middle, the grate bar is provided on both sides with projecting spacers 17.
- the base web 7 has three holes 18, 19, 20 distributed over its length.
- two laterally projecting support blocks 21, 22 are attached on opposite sides of the base web 7. The one support block 21 is set back a little in relation to the associated end face of the grate bar head 6, the other support block 22 projects somewhat in relation to the associated end face.
- the base web 7 is provided at both ends with a slot 23, 24, the upper edge of which is flush with the underside of the support block 21, 22.
- the lines which represent the undersides of the two support blocks 21, 22 are parallel to the surface line 9 of the grate rod head 6.
- the flanges of the T-beams 3 engage in the slots 23, 24. It goes without saying that the slots 23, 24 are so long and so wide that there is still some play even in the hot operating state. Apart from this slight play, the position of the grate bars 4 is invariable relative to the supporting structure.
- the undersides of the support blocks 21, 22 rest on the flanges of the supports 3. Due to the offset arrangement of the two support blocks 21, 22, the support base of the grate bar 4 is widened.
- the support blocks 21, 22 also act as spacers. In addition, the spacers 17 ensure that the prescribed width of the air slots 5 between the longitudinal sides of adjacent grate bars 4 is maintained.
- the air slots are - evenly along the entire length of the grate roller - at an angle to the roller surface, i.e. their center lines 26 (FIG. 2), which illustrate the direction of the exiting air jets, lie on cone shells, so that the air jets receive a speed component in the axial direction of the grate roller.
- the grate bar ends overlap due to the arrangement of the support blocks 21, 22 described above, as can be seen from FIG. Long rods 27 sit in the holes 18, 19, 20.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Incineration Of Waste (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Food-Manufacturing Devices (AREA)
- Crushing And Grinding (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
Description
Die Erfindung betrifft eine Rostwalze gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a grate roller according to the preamble of
Der Stand der Technik, auf dem die Erfindung aufbaut, ist der DE 33 41 835 A1 zu entnehmen. Darin wird eine Rostwalze beschrieben, deren Roststäbe einen asymmetrischen, einseitig verbreiterten Kopf haben; die andere Seite des Roststabkopfes ist einfach eine glatte Fortsetzung der entsprechenden Seite des Basisstegs. Die Roststäbe sind an den Trägern - in Querrichtung zu der verbreiterten Seite hin klappbar - angelenkt. Sie haben also gegenüber den meisten bekannten Roststäben einen zusätzlichen Bewegungsfreiheitsgrad.The prior art on which the invention is based can be found in DE 33 41 835 A1. This describes a grate roller, the grate bars of which have an asymmetrical head widened on one side; the other side of the grate bar head is simply a smooth continuation of the corresponding side of the base bar. The grate bars are hinged to the brackets, which can be folded in the transverse direction towards the widened side. So you have an additional degree of freedom of movement compared to most known grate bars.
Im Betrieb liegen die auf der Feuerraumseite - d.h. auf dem gerade oben befindlichen Teil des Rostwalzenmantels - befindlichen Roststäbe schuppenähnlich schräg mit den Längsseiten übereinander, wobei durch Abstandhalter zwischen je zwei benachbarten Roststabköpfen ein schrägliegender Luftschlitz freigehalten wird. Wegen der Schräglage der Luftschlitze haben die austretenden Luftstrahlen eine zur Walzenachse parallele Geschwindigkeitskomponente. Auf dem gerade unten befindlichen Teil des Walzenmantels hängen die Roststäbe auseinandergeklappt senkrecht nach unten.In operation, they are on the combustion chamber side - i.e. on the part of the grate roller shell just above - grate bars located at an angle like scales with the long sides one above the other, whereby an oblique air slot is kept free by spacers between two adjacent grate bar heads. Because of the inclined position of the air slots, the emerging air jets have a speed component parallel to the roller axis. On the part of the roller shell that is just below, the grate bars hang vertically downwards when unfolded.
Betriebliche Erfahrungen haben überraschenderweise gezeigt, daß bei schräg austretenden Luftstrahlen die Ausnutzung der Primärluft merklich besser ist als bei senkrecht austretenden Luftstrahlen. Das hängt offenbar damit zusammen, daß die auf dem Rost liegende Brennstoffschicht - bedingt durch die Inhomogenität des Mülls - vielfach Löcher aufweist. Senkrecht gerichtete Luftstrahlen, die im Bereich eines solchen Loches die Brennstoffschicht durchstoßen, bleiben völlig ungenutzt. Treten jedoch die Luftstrahlen in schräger, zur Walzenachse spitzwinkliger Richtung aus, so stoßen sie seitlich in die Brennstoffmasse hinein, die das Loch umgibt.Operational experience has surprisingly shown that the use of primary air is noticeably better in the case of obliquely emerging air jets than in the case of vertically emerging air jets. This obviously has to do with the fact that the fuel layer lying on the grate - due to the inhomogeneity of the waste - often has holes. Vertically directed air jets that penetrate the fuel layer in the area of such a hole remain completely unused. However, the air jets occur at an angle, more acute to the roller axis Direction, they push sideways into the fuel mass that surrounds the hole.
Andererseits hat sich aber gezeigt, daß die klappbare Anordnung der Roststäbe unter den vorherrschenden rauhen Betriebsbedingungen nicht immer in der gewünschten Weise funktioniert, so daß gelegentliche Störungen unvermeidlich sind.On the other hand, it has been shown that the foldable arrangement of the grate bars does not always work in the desired manner under the prevailing rough operating conditions, so that occasional malfunctions are inevitable.
Aus der US-A-2 403 787 ist ein Feuerungsrost mit zahlreichen geraden Roststäben bekannt, die auf Trägern befestigt sind. Jeder Roststab besteht aus einem Kopf und einem Basissteg und hat einen im wesentlichen T-förmigen Querschnitt.From US-A-2 403 787 a firing grate with numerous straight grate bars is known, which are fastened on supports. Each grate bar consists of a head and a base web and has a substantially T-shaped cross section.
Der Kopf ist an den Längsseiten mit einer Reihe von schmalen Einkerbungen versehen, deren Grund von der Oberseite des Kopfes dachartig zu einer Seitenfläche hin abgeschrägt ist. Zwischen den Einkerbungen ist die Seitenfläche des Roststabkopfes mit nutenartigen Einschnitten versehen, die von der Unterseite des Kopfes ausgehen und in einer Höhe enden, die deutlich über den unteren Dachkanten der benachbarten Kerben liegt. Die Kerben und Nuten der beiden Roststabseiten sind zueinander versetzt, so daß bei den aneinanderstoßenden Seiten zweier benachbarter Roststäbe die Kerben des einen Roststabes mit den Nuten des anderen Roststabes fluchten. Die Nuten bilden Luftkanäle, die sich von der Unterseite des Roststabkopfes aufwärts erstrecken und etwa in halber Höhe über der unteren Dachkante der entsprechenden Kerbe des benachbarten Roststabs eine seitliche Öffnung aufweisen, so daß ein austretender Luftstrahl schräg nach oben gelenkt wird. Durch die versetzte Anordnung werden die Luftstrahlen abwechselnd zur einen und zur anderen Seite gelenkt. Dadurch entsteht eine definierte Wirbelbewegung, die eine gute Luftverteilung bewirkt. Der Rost ist insbesondere für ein Brennstoffbett von geringer Schichthöhe geeignet, z.B. 1''.The head is provided with a series of narrow indentations on the long sides, the bottom of which is chamfered from the top of the head to a side surface. Between the notches, the side surface of the grate bar head is provided with groove-like incisions which start from the underside of the head and end at a height which is clearly above the lower roof edges of the adjacent notches. The notches and grooves of the two grate bar sides are offset from one another, so that on the abutting sides of two adjacent grate bars the notches of one grate bar are aligned with the grooves of the other grate bar. The grooves form air channels which extend upwards from the underside of the grate bar head and have a lateral opening approximately halfway above the lower roof edge of the corresponding notch of the adjacent grate bar, so that an emerging air jet is directed obliquely upwards. The staggered arrangement alternately directs the air jets to one side and the other. This creates a defined vortex movement that causes good air distribution. The grate is particularly suitable for a fuel bed with a low layer height, e.g. 1''.
Ein aus der GB-A-601 599 bekannter, ebenfalls aus Basissteg und Kopf bestehender Roststab ist in Längsrichtung in drei Abschnitte unterteilt. Im mittleren Abschnitt ist der Kopf zur einen Längsseite geneigt, in den beiden Endabschnitten zur anderen Seite. Die Endabschnitte sind zu dem mittleren Abschnitt seitlich versetzt, so daß bei nebeneinander liegenden Roststäben die Köpfe sich abschnittweise wechselseitig in den Randbereichen überdecken. In den Überdeckungsbereichen bestehen enge, schräg liegende Spalte, aus denen im Betrieb Luftstrahlen abwechselnd zur einen und zur anderen Seite schräg nach oben gerichtet austreten. Der Rost ist für feinkörnige Anthrazitkohle und dergleichen geeignet und soll einen gleichmäßigen Zug gewährleisten.A grate bar known from GB-A-601 599, also consisting of a base web and head, is divided into three sections in the longitudinal direction. In the middle section the head is inclined to one long side, in the two end sections to the other side. The end sections are to the middle section laterally offset, so that when the grate bars are next to each other, the heads alternately overlap in sections in the edge areas. In the areas of overlap there are narrow, sloping gaps from which air jets alternately emerge towards one side and towards the other in operation. The grate is suitable for fine-grain anthracite coal and the like and is intended to ensure an even draft.
In der DE 33 16 363 A1 wird eine Rostwalze beschrieben, deren Roststäbe einen T-ähnlichen symmetrischen Querschnitt haben. Die Roststäbe sind an den Trägern mit geringem Spiel eingehängt, so daß sie - durch die Rotation der Walze bedingt - im Betrieb geringe Relativbewegungen ausführen. Von diesen kleinen Bewegungen abgesehen, ist ihre Lage relativ zur Tragkonstruktion unveränderlich. Die Luftschlitze, die die Richtung der austretenden Luftstrahlen bestimmen, sind senkrecht zur Walzenoberfläche ausgerichtet.DE 33 16 363 A1 describes a grate roller whose grate bars have a T-like symmetrical cross section. The grate bars are attached to the supports with little play, so that they - due to the rotation of the roller - perform small relative movements during operation. Apart from these small movements, their position is invariable relative to the supporting structure. The air slots, which determine the direction of the emerging air jets, are aligned perpendicular to the roller surface.
Eine ähnliche Rostwalze ist auch der DE 34 20 020 A1 zu entnehmen.A similar grate roller can also be found in DE 34 20 020 A1.
Der Erfindung liegt die Aufgabe zugrunde, bei einer Rostwalze gemäß dem Oberbegriff des Anspruchs 1 die bei klappbaren Roststäben beachteten Probleme zu vermeiden, ohne auf den Vorteil der schräg liegenden Luftschlitze zu verzichten.The invention has for its object to avoid the problems noted in foldable grate bars in a grate roller according to the preamble of
Diese Aufgabe wird durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst.This object is achieved by the characterizing features of
In Anspruch 2 sind die ungefähren Grenzen des Bereichs angegeben, in dem der schiefe Winkel variiert werden kann.
Bevorzugte Ausführungsbeispiele für die Rostwalze sind in Anspruch 3 angegeben.Preferred embodiments for the grate roller are given in
Anspruch 4 betrifft ein vorteilhaftes Merkmal.
Durch das Merkmal des Anspruchs 5 wird einer Verkantung der Roststäbe entgegengewirkt.A tilting of the grate bars is counteracted by the feature of
Durch das Merkmal des Anspruchs 6 werden bei etwaigen Roststabbrüchen die Bruchstücke provisorisch festgehalten.Due to the feature of
Die Zeichnung dient zur Erläuterung der Erfindung anhand eines Ausführungsbeispiels.
Figur 1 zeigt schematisch eine Rostwalze gemäß der Erfindung in perspektivischer Darstellung.Figur 2 zeigt in vergrößertem Maßstab einen vereinfachten Querschnitt durch einen Roststab und einen Teil eines benachbarten Roststabes.Figur 3 zeigt eine Seitenansicht eines Roststabs im eingebauten Zustand.Figur 4 zeigt eine Draufsicht auf einen Roststab in gestreckter Länge.
- Figure 1 shows schematically a grate roller according to the invention in perspective.
- FIG. 2 shows, on an enlarged scale, a simplified cross section through a grate bar and part of an adjacent grate bar.
- Figure 3 shows a side view of a grate bar in the installed state.
- Figure 4 shows a plan view of a grate bar in an elongated length.
Die Figuren 5 bis 8 zeigen zwei nebeneinanderliegende Roststäbe in verschiedenen Darstellungen, und zwar
Figur 5 in einem Schnitt CD derFigur 3Figur 6 in einem Schnitt EF derFigur 3Figur 7 in einer Ansicht "A" derFigur 3- Figur 8 in einer Ansicht "B" der
Figur 3
Die
- FIG. 5 in a section CD of FIG. 3
- FIG. 6 in a section EF from FIG. 3
- Figure 7 in a view "A" of Figure 3
- FIG. 8 in a view “B” from FIG. 3
Figures 3 to 8 are true-to-original drawings on a reduced scale.
Die in Figur 1 erkennbare Rostwalze hat eine Tragkonstruktion, die im wesentlichen aus einer Hohlwelle 1, radialen Verbindungselementen 2 und aus mehreren zur Achse der Hohlwelle parallelen T-Trägern 3 besteht. Die Träger 3 sind durch die Verbindungselemente 2 an der Hohlwelle 1 befestigt und bilden gemeinsam einen zylindrischen Käfig. Diese Tragkonstruktion ist mit einem Mantelbelag versehen, der aus zahlreichen, an den Trägern 3 befestigten kreisbogenförmigen Roststäben 4 besteht. Zwischen den Längsseiten benachbarter Roststäbe befinden sich Luftschlitze 5, die in Umfangsrichtung der Rostwalze verlaufen.The grate roller which can be seen in FIG. 1 has a support structure which essentially consists of a
Eine typische Rostwalze ist 5 m lang und hat einen Durchmesser von 1,5 m. Jeder Roststab 4 erstreckt sich über einen Kreisbogen von 36°, so daß insgesamt zehn Roststäbe einen geschlossenen Ring bilden. Der Mantelbelag umfaßt hundert derartige Ringe, d.h. er besteht aus insgesamt tausend Roststäben. Die Breite der Luftschlitze beträgt etwa 2 mm.A typical grate roller is 5 m long and 1.5 m in diameter. Each
Jeder Roststab 4 hat einen Kopf 6 und einen Basissteg 7, der sich nach unten verjüngt (der Einfachheit halber wird hier und im folgenden die von der Mantelfläche in Richtung der Walzenachse weiter entfernte Stelle als "unten" bezeichnet).Each
Der Kopf 6 ist begrenzt von einer zylindrisch gewölbten, glatten Mantelfläche und zwei ebenfalls glatten Seitenflächen, die praktisch eben, im Prinzip jedoch schwach konisch sind, wie sich aus dem Folgenden ergeben wird. Der Mantelfläche entspricht im Querschnitt die Mantellinie 9, den Seitenflächen die Seitenlinien 10, 11. Die Seitenlinie 10 schließt mit der Mantellinie einen Winkel α von 60° ein. Der Winkel β zwischen der Mantellinie 9 und der Seitenlinie 11 ist 120°. Die Seitenlinien 10, 11 sind also zueinander parallel. Die zur Mantellinie 9 parallele Linie 12, die von dem unteren Endpunkt der Seitenlinie 11 ausgeht, ergänzt die Linien 9, 10, 11 zu einem Rhomboid. Die Mittellinie 13 des Basisstegs 7 teilt dieses schiefwinklige Parallelogramm in zwei etwa gleichgroße Teile. Das bedeutet, daß die Mittellinie 13 die zu ihr rechtwinklige Mantellinie 9 in einem vom Winkel α abhängigen Verhältnis unterteilt, das bei dem dargestellten Ausführungsbeispiel zwischen 1,6 und 1,7 liegt. Der Winkel α kann im Bereich zwischen etwa 45 und 75° liegen. Der Winkel β kann in einem entsprechenden Bereich liegen, so daß die Summe der beiden Winkel zwischen 170 und 180° liegt. Wenn die Summe der beiden Winkel kleiner als 180° ist, d.h. wenn die Seitenlinien 10, 11 nicht exakt parallel sind, dann bedeutet das, daß sich der Luftschlitz 5 zwischen benachbarten Roststäben 4 zur Walzenoberfläche hin düsenartig verengt.The
Die Seitenlinie 10 setzt sich unterhalb der Linie 12 geradlinig fort und geht in Form eines Bogens in die Begrenzungslinie des Basisstegs 7 über. Auf der gegenüberliegenden Seite ist der Querschnitt des Kopfes 6 unterseits durch einen Bogen 14 begrenzt, dessen Endpunkt mit dem Endpunkt der Linie 11 durch eine kurze Linie 15 verbunden ist, die mit der Linie 12 einen Winkel von etwa 45° einschließt.The
Der Basissteg 7 ist symmetrisch zu der Linie 13. Er ist wesentlich schmaler als der Kopf 6. Seine Breite im unteren Bereich steht zu dem Abstand der Mittelinien 13 zweier benachbarter Roststäbe 4 etwa im Verhältnis 1:6, wie z.B. aus Figur 5 erkennbar. Seitlich an dem Basissteg 7 sind mehrere Kühlrippen 16 angebracht. In der Mitte ist der Roststab beidseitig mit vorspringenden Abstandhaltern 17 versehen. Der Basissteg 7 hat drei über seine Länge verteilte Löcher 18, 19, 20. An den Enden des Roststabes sind auf gegenüberliegenden Seiten des Basisstegs 7 zwei seitlich vorstehende Auflageblöcke 21, 22 angebracht. Der eine Auflageblock 21 ist gegenüber der zugehörigen Endfläche des Roststabkopfes 6 ein wenig zurückgesetzt, der andere Auflageblock 22 springt gegenüber der zugehörigen Endfläche etwas vor. Der Basissteg 7 ist an beiden Enden mit je einem Schlitz 23, 24 versehen, dessen Oberkante mit der Unterseite des Auflageblocks 21, 22 fluchtet. In der Ansicht gemäß Figur 7 oder Figur 8 sind die Linien, die die Unterseiten der beiden Auflageblöcke 21, 22 darstellen, parallel zur Mantellinie 9 des Roststabkopfes 6.The
Im montierten Zustand greifen die Flansche der T-Träger 3 in die Schlitze 23, 24 ein. Es versteht sich, daß die Schlitze 23, 24 so lang und so breit sind, daß auch im heißen Betriebszustand noch etwas Spiel vorhanden ist. Von diesem geringen Spiel abgesehen, ist die Lage der Roststäbe 4 relativ zur Tragkonstruktion unveränderlich. Die Auflageblöcke 21, 22 liegen mit ihren Unterseiten an den Flanschen der Träger 3 auf. Durch die seitenversetzte Anordnung der beiden Auflageblöcke 21, 22 wird die Auflagebasis des Roststabs 4 verbreitert. Die Auflageblöcke 21, 22 wirken auch als Abstandhalter. Außerdem sorgen die Abstandhalter 17 dafür, daß die vorgeschriebene Breite der Luftschlitze 5 zwischen den Längsseiten benachbarter Roststäbe 4 beibehalten wird. Die Luftschlitze liegen - auf der ganzen Länge der Rostwalze gleichmäßig - schräg zur Walzenoberfläche, d.h. ihre Mittellinien 26 (Figur 2), die die Richtung der austretenden Luftstrahlen veranschaulichen, liegen auf Kegelmänteln, so daß die Luftstrahlen eine Geschwindigkeitskomponente in Achsrichtung der Rostwalze erhalten. An den Stoßstellen 25 zweier stirnseitig aneinanderstoßender Roststäbe 4 greifen die Roststabenden infolge der oben beschriebenen Anordnung der Auflageblöcke 21, 22 übereinander, wie aus Figur 3 ersichtlich. In den Löchern 18, 19, 20 sitzen lange Stangen 27.In the assembled state, the flanges of the T-
Claims (6)
- A grate drum for a roller grate in a waste incineration plant,
with a supporting construction having a plurality of axially parallel supports (3) arranged in the manner of a cylindrical cage,
and with a surface covering made up of numerous fire bars (4) shaped as an arc of a circle and secured to the supports (3),
each fire bar (4) having a narrow base limb (7) and a broadened head (6) with a cylindrically curved smooth outer surface and smooth side surfaces,
and wherein the cross-section of the upper part of the fire bar head (6) adjacent to the outer surface has a shape similar to a rhomboid, so that ventilation slots (5) extending in the peripheral direction between the longitudinal sides of adjacent fire bars (4) are positioned at an angle to the surface of the roller,
characterised in that apart from a slight amount of play, the position of the fire bars (4) is constant in relation to the supporting construction. - A grate drum in accordance with claim 1, characterised in that the angle between the surface line (9) and the side line (10) of the rhomboid-like cross-section is between 45° and 75°.
- A grate drum in accordance with claim 2, characterised in that the angle is approximately 60°.
- A grate drum in accordance with one of claims 1 to 3, characterised in that the central line (13) of the base limb (7) divides the rhomboid-like cross-section into two partial cross-sections of substantially equal area.
- A grate drum in accordance with one of claims 1 to 4, characterised in that the fire bar (4) has two support blocks (21, 22) which are positioned at each of its ends on opposite sides and which rest via their lower surfaces on the flanges of the supports (3).
- A grate drum in accordance with one of claims 1 to 5, characterised in that the base limbs (7) of the fire bars (4) are each provided with at least two holes (18, 19, 20), and rods (27) parallel to the axis are positioned in the holes.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8905822U | 1989-05-10 | ||
| DE8905823U DE8905823U1 (en) | 1989-05-10 | 1989-05-10 | Rust roller |
| DE8905823U | 1989-05-10 | ||
| DE8905822U DE8905822U1 (en) | 1989-05-10 | 1989-05-10 | rust bar |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0396908A2 EP0396908A2 (en) | 1990-11-14 |
| EP0396908A3 EP0396908A3 (en) | 1991-05-08 |
| EP0396908B1 true EP0396908B1 (en) | 1994-06-08 |
Family
ID=25954770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90106560A Expired - Lifetime EP0396908B1 (en) | 1989-05-10 | 1990-04-05 | Grate bar and rotary grate |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5081939A (en) |
| EP (1) | EP0396908B1 (en) |
| AT (1) | ATE107007T1 (en) |
| DE (1) | DE59005994D1 (en) |
| DK (1) | DK0396908T3 (en) |
| ES (1) | ES2055819T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106594702A (en) * | 2016-11-09 | 2017-04-26 | 嘉善永金金属制品有限公司 | Technological assembly line of boiler |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4316343A1 (en) * | 1993-05-15 | 1994-11-17 | Babcock Energie Umwelt | Roller grate for incinerators |
| US5655463A (en) * | 1995-06-19 | 1997-08-12 | Douglas Nagel | Apparatus and method for burning waste material |
| DE19851471A1 (en) * | 1998-11-09 | 2000-05-11 | Mitteldeutsche Feuerungs Und U | Feed grate cover for combustion furnace has narrow S-shaped gaps to allow very little material to fall through and uses stair-step-type bars in close contact |
| BR7900232U (en) * | 1999-02-03 | 2000-09-05 | Vale Do Rio Doce Co | Grid bar improvement for pelletizing and sintering furnaces |
| US6964237B2 (en) * | 2003-06-30 | 2005-11-15 | Mark P. Hepp | Grate block for a refuse incineration grate |
| DE102007020515B4 (en) * | 2007-04-29 | 2013-08-22 | Wvt Breiding Gmbh | Axially displaceable grate bar, grate bar set and roller grate can be pushed onto a roller grate |
| CN103335320A (en) * | 2013-07-31 | 2013-10-02 | 彭小平 | Rotary air-cooling grate of boiler |
| WO2020009620A1 (en) * | 2018-07-03 | 2020-01-09 | Александр Петрович СЕМЕНИХИН | Grate |
| RU185115U1 (en) * | 2018-07-03 | 2018-11-22 | Александр Петрович Семенихин | STAFF |
| FR3095498B1 (en) * | 2019-04-23 | 2021-05-21 | Saretco | Grate roller bar for improved air circulation incinerator furnace hearth, matching roller and grate |
| CN115446084B (en) * | 2022-10-13 | 2023-08-04 | 桦甸市润洁环保有限公司 | Household garbage derived fuel processing equipment and processing technology thereof |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2257295A (en) * | 1937-09-10 | 1941-09-30 | Jr Andrew Gaul | Grate |
| US2372260A (en) * | 1942-06-09 | 1945-03-27 | Waugh Equipment Co | Grate bar |
| GB601599A (en) * | 1943-02-27 | 1948-05-10 | Dorothy Beryl Balmfirth | Improvements in or relating to grates |
| US2403787A (en) * | 1944-08-07 | 1946-07-09 | Wm Bros Boiler & Mfg Co | Grate |
| US3078839A (en) * | 1961-02-17 | 1963-02-26 | Earland R Mitchell | Dump grate |
| DE1260665B (en) * | 1967-05-23 | 1968-02-08 | Ver Kesselwerke Ag | Grate covering for the grate rollers of a roller grate in waste incineration plants |
| DE2805712C2 (en) * | 1978-02-10 | 1980-01-31 | Josef Martin Feuerungsbau Gmbh, 8000 Muenchen | Grate bar, especially for mechanically moved grates in large firing systems |
| HU178846B (en) * | 1980-03-11 | 1982-07-28 | Ernoe Biro | Stoker for firing solid fuel first for fulfilling the heat demand of family houses and single aparatments or smaller group of them |
| DE3316363A1 (en) * | 1983-05-05 | 1984-11-08 | Deutsche Babcock Anlagen Ag, 4200 Oberhausen | ROLLER GRID FOR WASTE COMBUSTION PLANTS |
| DE3341835A1 (en) * | 1983-11-19 | 1985-05-30 | Deutsche Babcock Anlagen Ag, 4200 Oberhausen | Grate lining for furnace grates with revolving grate combustion paths |
| DE3420020A1 (en) * | 1983-12-23 | 1985-07-04 | Müllverbrennungsanlage Wuppertal GmbH, 5600 Wuppertal | RUST BAR AND RUST ROLLER FOR THE ROLL GRID e.g. A WASTE COMBUSTION PLANT OR THE LIKE |
-
1990
- 1990-04-05 DE DE59005994T patent/DE59005994D1/en not_active Expired - Fee Related
- 1990-04-05 ES ES90106560T patent/ES2055819T3/en not_active Expired - Lifetime
- 1990-04-05 AT AT90106560T patent/ATE107007T1/en not_active IP Right Cessation
- 1990-04-05 EP EP90106560A patent/EP0396908B1/en not_active Expired - Lifetime
- 1990-04-05 DK DK90106560.7T patent/DK0396908T3/en active
-
1991
- 1991-01-08 US US07/638,611 patent/US5081939A/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106594702A (en) * | 2016-11-09 | 2017-04-26 | 嘉善永金金属制品有限公司 | Technological assembly line of boiler |
| CN106594702B (en) * | 2016-11-09 | 2019-03-01 | 嘉善永金金属制品有限公司 | A kind of boiler |
Also Published As
| Publication number | Publication date |
|---|---|
| DK0396908T3 (en) | 1994-09-19 |
| US5081939A (en) | 1992-01-21 |
| ATE107007T1 (en) | 1994-06-15 |
| ES2055819T3 (en) | 1994-09-01 |
| EP0396908A3 (en) | 1991-05-08 |
| EP0396908A2 (en) | 1990-11-14 |
| DE59005994D1 (en) | 1994-07-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE69011005T2 (en) | Ceramic gas burner for hot air heaters and stones therefor. | |
| EP0396908B1 (en) | Grate bar and rotary grate | |
| EP0757206B1 (en) | Grate for a furnace | |
| EP0537523B1 (en) | Cooling grate | |
| DE2926987B1 (en) | Screening machine screen deck | |
| DE19600031A1 (en) | High-load rapid-adjustment machine carrier | |
| DE3728007A1 (en) | GAS BURNER | |
| DE2211600A1 (en) | Rust cover | |
| EP0268208B1 (en) | Burner for a boiler using solid fuel | |
| DE3834813A1 (en) | FILTER / WATER SEPARATOR | |
| DE2721525C2 (en) | Burner for a chimney used to burn flammable gases | |
| DE8905822U1 (en) | rust bar | |
| DE3128137C2 (en) | Work table, in particular an office table | |
| DE4210039C2 (en) | Ball circulation unit for a linear guide | |
| EP0780628B1 (en) | Premix burner for a heat generator | |
| DE3418921C2 (en) | Finned tube design for a heating boiler for liquid or gaseous fuels | |
| DE8905823U1 (en) | Rust roller | |
| CH615348A5 (en) | ||
| DE3019131A1 (en) | DEVICE FOR THE LINEAR GUIDANCE OF A MACHINE ELEMENT ALONG A BAR | |
| DE3509506A1 (en) | Atmospheric gas burner | |
| DE3009084C2 (en) | Rowable table, which consists of individual tables | |
| DE4030135C2 (en) | Nozzle ring for a liquid propane gas burner for hot air balloons and a method for producing it | |
| DE1542197B1 (en) | Device for contacting a liquid with a gas | |
| DE9116829U1 (en) | Burner plate for radiant burners | |
| DE3938832C2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH DE DK ES FR GB IT LI LU NL SE |
|
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
| AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH DE DK ES FR GB IT LI LU NL SE |
|
| 17P | Request for examination filed |
Effective date: 19910521 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: DEUTSCHE BABCOCK ANLAGEN GMBH |
|
| 17Q | First examination report despatched |
Effective date: 19920710 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: DEUTSCHE BABCOCK ANLAGEN GMBH |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE DK ES FR GB IT LI LU NL SE |
|
| REF | Corresponds to: |
Ref document number: 107007 Country of ref document: AT Date of ref document: 19940615 Kind code of ref document: T |
|
| REF | Corresponds to: |
Ref document number: 59005994 Country of ref document: DE Date of ref document: 19940714 |
|
| ITF | It: translation for a ep patent filed |
Owner name: DE DOMINICIS & MAYER S.R.L. |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19940620 |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2055819 Country of ref document: ES Kind code of ref document: T3 |
|
| REG | Reference to a national code |
Ref country code: DK Ref legal event code: T3 |
|
| ET | Fr: translation filed | ||
| EAL | Se: european patent in force in sweden |
Ref document number: 90106560.7 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: LU Payment date: 19990330 Year of fee payment: 10 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20000405 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20000410 Year of fee payment: 11 Ref country code: FR Payment date: 20000410 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20000412 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20000417 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 20000418 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20000420 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DK Payment date: 20000425 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20000426 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 20000428 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20010305 Year of fee payment: 12 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010405 Ref country code: DK Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010405 Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010405 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010406 Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010406 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY Effective date: 20010430 Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010430 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010504 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010504 |
|
| BERE | Be: lapsed |
Owner name: DEUTSCHE BABCOCK ANLAGEN G.M.B.H. Effective date: 20010430 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20011101 |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20010405 |
|
| EUG | Se: european patent has lapsed |
Ref document number: 90106560.7 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 20011101 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20021101 |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20030203 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050405 |