EP2751488B1 - Grille destinée à la combustion de matières solides - Google Patents

Grille destinée à la combustion de matières solides Download PDF

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Publication number
EP2751488B1
EP2751488B1 EP11752202.9A EP11752202A EP2751488B1 EP 2751488 B1 EP2751488 B1 EP 2751488B1 EP 11752202 A EP11752202 A EP 11752202A EP 2751488 B1 EP2751488 B1 EP 2751488B1
Authority
EP
European Patent Office
Prior art keywords
grate
incineration
elements
cooling
coupling
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
EP11752202.9A
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German (de)
English (en)
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EP2751488A1 (fr
Inventor
Ernst Schenkel
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Individual
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Individual
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Priority to SI201131524T priority Critical patent/SI2751488T1/en
Publication of EP2751488A1 publication Critical patent/EP2751488A1/fr
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Publication of EP2751488B1 publication Critical patent/EP2751488B1/fr
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Classifications

    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H2900/00—Special features of combustion grates
    • F23H2900/03021—Liquid cooled grates

Definitions

  • the invention relates to a grate consisting of a plurality of fluid-cooled grate elements for burning solid matter according to the preamble of claim 1.
  • a combustion grate has at least one grate row with a plurality of fluid-cooled grate elements, which are arranged side by side and mechanically connected to each other. Cooling fluid is passed through a conduit or channel of the grate element.
  • the channels of the grate elements are usually coupled together in series.
  • Grate elements are also referred to as grate bars or grate plates.
  • a grate may comprise a plurality of grate rows, which are usually brick-like, at least in places are arranged one above the other.
  • the documents EP 1760400 such as EP 0663565 show a grate element made of cast steel, which is part of a water-cooled grate within a plant for the thermal treatment of waste.
  • the grate element through which the cooling water flows has two or more cast steel cooling channels running virtually parallel.
  • the inputs and Outlet openings are preferably arranged directly at the foot-side end of the cooling channel, emerging from the bottom of the grate element.
  • the cooling channels of the grate elements are connected to each other by means of screwed to the grate elements fittings and pipe sections, for example. So-called manifold.
  • Each grate row has a main supply line and a main drain line for supplying and discharging the cooling fluid.
  • the document EP 1219898 A1 shows a grate block, which is part of a grate within a plant for thermal treatment of waste.
  • the flowed through by the cooling water pipe is in this case arranged between the created as a cast grate block and a separate holding part.
  • the inlet and outlet of the cooling fluid via pipe systems which are arranged in the region of the grate element carrier to the rear.
  • the supply takes place from a common distribution system and the connection takes place via pipelines with screw connections or weldings.
  • the document US 1170317 A1 discloses a generic grate in the juxtaposed grate elements are interconnected by flowed through by cooling fluid pipe pieces. The pipe sections are bolted to the grate elements.
  • the document EP 1315936 A1 describes a liquid-cooled grate element with cast-in cooling coils. The liquid coolant is supplied to and removed from each grate element from below in the area of a construction intended to carry the grate elements, also called a grate element carrier.
  • the connection to the cooling system takes place via bolted pipes.
  • the connection to the adjacent grate elements via screwed tubular spacers, called manifolds.
  • connection to the adjacent grate element via pipe spacers with screw connections. Due to the constant pulling movement of the combustion grate, the connections to the adjacent grate element are subjected to increased leakage.
  • a disadvantage of the prior art is that when used separately and then connected to the cast block pipes only very small pipe cross-sections can be realized in the connection points, resulting in high pressure losses and low amounts of cooling water. Pressure losses are also due to the required fittings and pipe manifold unfavorably increased.
  • One of the advantages of the invention is that a small pressure drop of the cooling fluid is ensured by means of the direct coupling of the fluid channels of adjacent grate elements of a grate row of a grate.
  • large quantities of cooling water can be conveyed through the grate elements, since the grate elements are centered relative to one another and fixed by appropriate fastening means, whereby the leaks usually caused by the pulling movement of the combustion grate are prevented.
  • the coupling of the fluid channels of grate elements is also referred to below as a fluid connection.
  • Another advantage of the invention is that the compared to the known fluid connections extremely large cooling water flow area allows higher flow rates with less pressure loss. This leads to a better cooling of the grate elements.
  • Another advantage of the invention is that with appropriate design of the cooling connections, the fluid connection for water-cooled grate elements made of cast iron with cast cooling channels and grate elements with inserted or cast-in cooling elements can be used.
  • Another advantage of the invention is that the chosen embodiment of the fluid connection eliminates all welds in hard to reach places with difficult weld preparation and the risk of stress and crack formation.
  • An advantage of the invention is also that the execution of the grate elements for receiving the fluid connection takes place in connection with the production of the cast grate elements or with mechanical finishing.
  • Another advantage of the invention is that the material quality of the seals installed in the power bypass also meet the emergency running properties in case of failure of the grate cooling.
  • An advantage of the invention is that the fluid connection is made of stainless material and therefore insensitive to chemical corrosion and mechanical wear.
  • a coupling element for adjacent grate elements ensures a detachable, pressure-tight and self-centering fluid connection between adjacent grate elements with a large flow of cooling water and low pressure loss.
  • Rost element 2 which is shown perspectively has on both longitudinal sides of the side surfaces serving for receiving the solids to be burned shear surface vertically downwardly projecting side walls in which the mouth areas 3 of the running inside the grate elements cooling channels and connection openings 4 for receiving connecting means, such as screw connections are.
  • a coupling element 1 is shown, which fits into the mouth region 3 of the illustrated grate element 2 and a corresponding mouth region of a laterally adjoining grate element.
  • the position of the recording of the fluid connection is directed to the full length of the grate element side.
  • the position of the screw connections is taken into account.
  • a mechanical post-processing of the grate elements is required.
  • FIG. 2 In the sectional view of Fig. 2 is a form of the coupling element and its position in the mouth areas of the cooling channels of adjacent grate elements 2 shown.
  • the coupling element 1 described in detail below is sealed by means of a seal 8 against the grate elements 2.
  • the coupling element 1 has a centering part 12, as well as in two axial directions subsequent guide parts 11.
  • Coupling element 1 shown can be used for the inlet and outlet as a connecting element of fluid and is used independently in the direction of flow.
  • FIG. 2 illustrated embodiment shows a cooling water flow area 5 and a wall thickness 6, which are not limited in dimension and embodiment.
  • the illustrated embodiment is not on the Design and shape of the guide, centering and sealing parts limited.
  • the coupling element 1 couples the respective fluid or cooling channel laterally adjacent grate elements.
  • the length of the coupling element 1 is formed so that its free ends at least partially penetrate the side wall of a grate element 2.
  • the coupling element 1 preferably has a circular inner cross section.
  • the shape of the coupling element 1 can also be executed in polygonal form.
  • the choice of the thickness of the wall 6 of the coupling element 1 depends on the particular application and the prevailing operating conditions.
  • the guide parts 11 have a smaller diameter relative to the centering part 12 and serve for guidance and positioning during assembly of the grate elements 2 and terminate in the region of the cooling channels or pipe systems running inside the grate elements.
  • the guide parts 11 are conically shaped with a conicity which corresponds to a formed in the respective mouth region 3 of the grate elements inner cone.
  • the centering part 12 of the coupling element 1 is used to stabilize and center the grate elements 2 to each other.
  • the centering part is also conical in both directions, wherein the conicity of those of the guide members, so that insertion of the coupling element 1 in the mouth areas 3 can be done without trouble.
  • the cones or conical sections of guide part 11 and centering part 12 are preferably made with the same tolerances.
  • the space or space for receiving the seal 8 is preferably integrally formed on the grate element 2 in the mouth region as a seat or recess, so that a ring-shaped or polygonal sealing chamber is present.
  • the coupling element 1 is pressed in the assembled state against the deformable seal 8, which is compressed during assembly of the grate elements 2 and adapts to the sealing chamber.
  • the seal 8 seals the grate element 2 with respect to the coupling element 1.
  • the volume of the seal 8 is selected larger by a certain factor than the available volume of space, so that the seal 8 is optimally compressed.
  • FIG. 3 11 illustrates a broken-away view of a grate row 10 of the grate 100 in a sectional bottom view, in which the connection of the coupled fluid channels two grate elements 2 of the grate row 10 and the cooling channel guide is visible.
  • FIG. 3 shown cooled grate element 2 thus turned by 180 ° to imagine.
  • FIG. 5 cooled grate elements joined together view from above.
  • FIG. 4 illustrates the cooled grate elements 2 from below in the assembled state, wherein for the rigid connection of two grate elements 2 through holes or holes 4 for receiving screws or for the realization of screw are present.
  • the grate elements are screwed together on block and secured for solubility.
  • the coupling of the fluid channels by means of the coupling element 1 between two adjacent grate elements 2 is ensured via the same screw connections.
  • By tightening the screw the coupling element 1 is pressed into the corresponding channel mouth areas and positioned sealing.
  • a so-called diarrhea gap is formed, which is preferably kept small by the mechanical reworking so that solid or burning particles and ash do not fall through the gap.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Claims (11)

  1. Grille de brûlage de matières solides, comprenant au moins une rangée de grille (10) qui comporte plusieurs éléments de grille (2) disposés les uns à côté des autres, chaque élément de grille comportant au moins un conduit de fluide (30) dans lequel un fluide de refroidissement peut circuler et qui est doté de zones d'embouchure de conduit (3) correspondantes, les zones d'embouchure de conduit (3) d'éléments de grille (2) disposés les uns à côté des autres étant sensiblement coaxiales les unes par rapport aux autres, des éléments d'accouplement (1) étant prévus pour accoupler entre elles des zones d'embouchure de conduit (3) coaxiales, lesquels éléments d'accouplement étant conçus sous forme de manchon d'accouplement dans lequel un fluide peut circuler, et qui comportent au moins une pièce de guidage (11) et au moins une pièce de centrage (12), caractérisée en ce que
    l'au moins une pièce de guidage (11) de l'élément d'accouplement (1) possède une surface extérieure biseautée, de préférence conique et/ou l'au moins une pièce de centrage (12) de l'élément d'accouplement (1) possède une surface extérieure biseautée, de préférence conique, pour faciliter le montage et l'étanchéification.
  2. Grille de brûlage selon la revendication 1, caractérisée en ce que les zones d'embouchure de conduit (3) ont une section transversale interne circulaire ou polygonale.
  3. Grille de brûlage selon l'une des revendications précédentes, caractérisée en ce que la pièce de guidage (11) et la pièce de centrage (12) ont des circonférences extérieures sensiblement identiques ou des circonférences extérieures différentes, décalées l'une de l'autre.
  4. Grille de brûlage selon l'une des revendications précédentes, caractérisée en ce que l'élément d'accouplement (1) a une section transversale interne circulaire ou polygonale.
  5. Grille de brûlage selon l'une des revendications précédentes, caractérisée en ce qu'au moins un joint (8) formé d'une matière thermorésistante est prévu entre l'élément d'accouplement (1) et l'élément de grille (2) à l'état monté.
  6. Grille de brûlage selon la revendication 5, caractérisée en ce que le joint (8) est disposé dans un évidement (7), conçu pour le guidage du joint, d'un élément de grille (2) correspondant.
  7. Grille de brûlage selon l'une des revendications précédentes, caractérisée en ce que chaque élément de grille (2) comporte des conduits de refroidissement (30) longitudinaux, transversaux et/ou sinueux ou un conduit de refroidissement (30) conçu comme un tuyau de refroidissement.
  8. Grille de brûlage selon la revendication 7, caractérisée en ce qu'un conduit de refroidissement (30), conçu comme un tuyau de refroidissement, d'un élément de grille (2) est relié à l'élément de grille de manière amovible ou inamovible, par exemple par insertion ou injection.
  9. Grille de brûlage selon l'une des revendications précédentes, caractérisée en ce que l'alimentation et/ou l'évacuation du fluide de refroidissement d'une rangée (10) de la grille (100) sont reliées à au moins un élément de grille (2) de la rangée (10).
  10. Grille de brûlage selon l'une des revendications précédentes, caractérisée en ce qu'une dénivellation en forme de marche est prévue entre la pièce de guidage (11) et la pièce de centrage (12).
  11. Grille de brûlage selon l'une des revendications précédentes, caractérisée en ce que les éléments de grille (2) comportent des parois latérales dans lesquelles se trouvent des ouvertures de raccordement (4) destinées à loger des raccords à vis, les raccords à vis assurant l'accouplement des conduits de fluide à l'aide d'un élément d'accouplement (1) entre deux éléments de grille (2) adjacents.
EP11752202.9A 2011-09-01 2011-09-01 Grille destinée à la combustion de matières solides Active EP2751488B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI201131524T SI2751488T1 (en) 2011-09-01 2011-09-01 Grill for burning solid material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2011/065081 WO2013029680A1 (fr) 2011-09-01 2011-09-01 Grille destinée à la combustion de matières solides

Publications (2)

Publication Number Publication Date
EP2751488A1 EP2751488A1 (fr) 2014-07-09
EP2751488B1 true EP2751488B1 (fr) 2018-04-11

Family

ID=44583008

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11752202.9A Active EP2751488B1 (fr) 2011-09-01 2011-09-01 Grille destinée à la combustion de matières solides

Country Status (4)

Country Link
EP (1) EP2751488B1 (fr)
ES (1) ES2677016T3 (fr)
SI (1) SI2751488T1 (fr)
WO (1) WO2013029680A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2328469A (en) * 1941-09-04 1943-08-31 Laffly Edmond Gabriel Coupling device
US2333157A (en) * 1942-08-10 1943-11-02 James L Douglass Tube coupling
DE69001524T2 (de) * 1989-08-08 1993-12-02 Anson Ltd Rohrleitungsverbindung.

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1170317A (en) * 1914-06-23 1916-02-01 James M Nye Water-grate.
DE2158217A1 (de) * 1971-11-19 1973-05-24 Mannesmann Ag Anschluss einer etwa im rechten winkel zur anschlussoeffnung verlaufenden hochdruckleitung
US5060988A (en) * 1990-05-08 1991-10-29 Nwd International, Inc. Hydraulic coupling
DE4400992C1 (de) 1994-01-14 1995-05-11 Noell Abfall & Energietech Roststab und Rost mit Kühleinrichtung
DE29823148U1 (de) * 1998-12-22 1999-02-25 Mannesmann AG, 40213 Düsseldorf Flüssigkeitsgekühlter Verbrennungsrost
AU2000266797A1 (en) 2000-09-04 2002-03-22 Theodor Koch Grate bar with liquid cooling for incinerators
DE50012995D1 (de) 2000-12-29 2006-07-27 Von Roll Umwelttechnik Ag Rostblock als Teil eines Rostes für eine Anlage zur thermischen Behandlung von Abfall
US6988748B2 (en) * 2003-12-23 2006-01-24 Martinrea Industries, Inc. Fluid coupling assembly
DE102004034322B4 (de) * 2004-07-15 2006-09-28 Lurgi Lentjes Ag Rostplatte
CH697973B1 (de) * 2005-06-10 2009-04-15 Alstom Technology Ltd Rostwalze.
PL1760400T3 (pl) 2005-09-06 2009-08-31 Ernst Schenkel Chłodzony wodą element rusztu

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2328469A (en) * 1941-09-04 1943-08-31 Laffly Edmond Gabriel Coupling device
US2333157A (en) * 1942-08-10 1943-11-02 James L Douglass Tube coupling
DE69001524T2 (de) * 1989-08-08 1993-12-02 Anson Ltd Rohrleitungsverbindung.

Also Published As

Publication number Publication date
SI2751488T1 (en) 2018-08-31
EP2751488A1 (fr) 2014-07-09
WO2013029680A1 (fr) 2013-03-07
ES2677016T3 (es) 2018-07-27

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