EP2306086B1 - Barreau de grille - Google Patents

Barreau de grille Download PDF

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Publication number
EP2306086B1
EP2306086B1 EP10008873.1A EP10008873A EP2306086B1 EP 2306086 B1 EP2306086 B1 EP 2306086B1 EP 10008873 A EP10008873 A EP 10008873A EP 2306086 B1 EP2306086 B1 EP 2306086B1
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EP
European Patent Office
Prior art keywords
grate bar
grate
same
curved section
bar according
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
EP10008873.1A
Other languages
German (de)
English (en)
Other versions
EP2306086A2 (fr
EP2306086A3 (fr
Inventor
Jochen Poschlod
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.)
Mitsubishi Power Europe GmbH
Original Assignee
MHPS Europe GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MHPS Europe GmbH filed Critical MHPS Europe GmbH
Priority to PL10008873T priority Critical patent/PL2306086T3/pl
Publication of EP2306086A2 publication Critical patent/EP2306086A2/fr
Publication of EP2306086A3 publication Critical patent/EP2306086A3/fr
Application granted granted Critical
Publication of EP2306086B1 publication Critical patent/EP2306086B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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

Definitions

  • the present invention relates to a grate bar for arrangement in a grate of a combustion plant serving for the combustion of combustible material according to the preamble of claim 1.
  • combustion grate An important component of a combustion plant, such as a waste incineration plant for the thermal utilization of waste, is a combustion grate.
  • a combustion grate On such a combustion grate arranged horizontally or inclined in an incinerator, the combustible material travels from a first end to a second end, the first end being the feedstock for the kiln and the second end typically being referred to as a burnout grate on which the thermal conversion of the fuel finds its completion.
  • Combustion grates are nowadays usually constructed from a plurality of individual grate bars, which are joined together to form a corresponding combustion grate. This structure allows for easy replacement of individual grate bars in case of damage to individual areas of the grate.
  • the grate bars are usually set in rows next to each other, wherein the rows are arranged one above the other like a step, so that the rows partially overlap.
  • the individual rows are mutually displaceable to allow a transport of the fuel by a displacement of the overlapping grate bar rows against each other.
  • the grate bars used in such incinerators and the gratings formed from these must on the one hand have sufficient mechanical stability in order to receive and transport the kiln, on the other hand, they must also have a suitable high temperature resistance to the occurring during the thermal conversion of the combustible material To be able to withstand temperatures.
  • the WO 96/29544 A1 discloses grate bars which form a water-flowable chamber below the surface forming the grate coating, so that these grate bars are on the one hand water-cooled, but on the other hand are also air-cooled by combustion air flowing in from below. The combustion air exits laterally from between two adjacent grate bars formed and remaining column.
  • a grate bar is known, flows through the inflowing from below combustion air, which then exits through outlet openings at the top of the grate bar. To be able to cool this grate bar sufficiently, this is also equipped with corresponding cooling channels, which are traversed by a cooling liquid.
  • An air-cooled grate bar reveal the EP 0 126 264 A1 and the EP 0 165 432 A1 ,
  • the grate bars or grates are flown from an underside with an air flow and have outlet openings, through which the incoming combustion air can pass into the kiln.
  • Such grates or grate bars are for example from the DE 20111804 U1 known.
  • the European patent specification EP 1 612 483 B1 discloses a corresponding grate bar for use in incinerators, which is flown from an underside with an air flow, wherein the grate bars shown here have air ducts over which the stream of air flowed from below is passed through the combustion grate that he at the lying in the feed direction longitudinal side of Roststabes exit and there flows into the kiln.
  • a problem with the use of rust or grate bars in incinerators is the high-temperature corrosion occurring there.
  • High-temperature corrosion is a phenomenon similar to that of wet corrosion, but in this case corrosion is not caused by aqueous media but rather by reactions of the material with the kiln or combustion gaseous compounds.
  • halide-containing salts under the conditions prevailing in incinerators lead to the formation of volatile halides which attack the protective oxide layer formed on the material and thus lead to corrosion of the materials.
  • Nitrogen contained in the fuel as well as in the combustion air can diffuse under the conditions prevailing in the incinerator and in particular on the grate conditions in the material and there affect the mechanical stability of the material through the formation of metal nitrides such that it by the further transport of the fuel to a reinforced abrasive wear of the grate bars comes.
  • this object is achieved according to the invention that the first wear plate in istgerostetem first arc section falling through of firing in the Area below the grate bar preventing arrangement is disposed below the lying above her first arc portion, and that on the upper side for an inflowing from the bottom of the combustion air permeable outlet opening is formed.
  • the inventively provided first wear plate is spaced from the first arc portion disposed on the inside of the grate bar.
  • An inventive grate bar has on its upper side an outlet opening for directed against the bottom gaseous media, such as combustion air on. Through this opening, the combustion air passes from the area below the grate bar in the firing rod located on the grate bar. As a result, combustion air is passed into the kiln in such a way that a sufficient supply of the combustion process with combustion air is ensured.
  • a second wear plate is arranged below the second arc section passing over the rear longitudinal surface or the bevels spaced from the second arc section lying above it.
  • the second wear plate is spaced from the above her arranged lying second arc section.
  • the inventively provided wear plates may be attached to a central rib of the grate bar or be formed on this.
  • this is integrally formed, so that the first and second wear plate are integrally formed on a central rib of the grate bar.
  • this can be cast, for example, from a suitable material.
  • the above-mentioned center rib may comprise support webs or cooling webs in a grate bar according to the invention, via which the center rib is supported relative to the upper side of the grate bar.
  • the support webs or cooling webs can fulfill air-conducting functions and ensure guidance of the air flow directed from below against the grate bar to the outlet opening arranged at the top of the grate bar.
  • a grate bar according to the invention can have recesses, in particular in the region of the center rib, via which a plurality of grate bars can be connected to one another.
  • connecting means for example connecting webs are suitable, which are insertable into the recesses.
  • a grate bar according to the invention can have a support section with which it can be placed on a holding bar.
  • the support rod serves at the same time as a pivot bearing, around which a rotation of the grate bar is made possible when moving superposed, individual grate sections forming grate bars.
  • this has a support section both in the front region of the grate bar and in the rear region. This makes it possible to turn over the grate bar in case of too large corrosion phenomena in the region of the front first arc section and so make the rear second portion of the grate bar to a front portion. This doubles the service life of the individual Grate bar.
  • the grate bar In a particular embodiment of the grate bar this is designed mirror-symmetrically for this purpose to a transversely to the longitudinal extent of the grate bar mirror plane.
  • the first and second wear plate are formed from a different material from the rest of the material of the grate bar.
  • the material of the wear plates on a higher high temperature corrosion resistance as the material of the rest of the grate bar.
  • the wear plates are attached to the grate bar by suitable fastening means such as welding, screwing and the like or via a press fit.
  • the grate bar in a central rib may have a shape corresponding to the wear plates corresponding recess, in which a wear plate is inserted and clamped there in a suitable manner.
  • Fig. 1 shows a grate bar 1 according to the invention with a top 2, an end face 3, a rear longitudinal surface 4 and a bottom 5.
  • the grate bar 1 according to the invention may have a central rib 11 which is supported by support webs or cooling webs 12 with respect to the upper side 2.
  • the center rib 11 may have recesses 13 into which connecting means, for example, as connecting rods are insertable, whereby a plurality of grate bars 1 according to the invention can be combined to form a grate.
  • a first wear plate 7 is arranged at the center rib 11.
  • the first wear plate 7 is spaced from the first arc section 6 and may have support webs 17, via which it is supported relative to the center rib 11.
  • the grate bar 1 according to the invention has a support part 14 with which it rests on a support rod 18.
  • the grate bar 1 according to the invention can be arranged in a grid overlapping to adjacent grate bars, wherein it rests with a foot 15 on the top of a grate bar adjacent to its end face 3.
  • Fig. 2 shows an embodiment of a grate bar 1 according to the invention, also with a top 2, an end face 3, a rear longitudinal face 4 and a bottom 5.
  • Fig. 2 shown grate bar corresponds essentially to the structure of the grate bar, as in Fig. 1 is shown.
  • the in Fig. 2 However, shown grate bar has, below the outlet opening 10 and adjacent to the first wear plate 7, a passage 16 through which the combustion air flowed from the bottom 5 can pass into a transfer port 19 before it exits through the outlet opening on the top of the grate bar 1 according to the invention and in the kiln gets.
  • the overflow channel 19 begins in the region of the foot 15 and terminates in the present embodiment in the region of the end of the arranged on the upper side 2 outlet opening 10.
  • the brought up from the bottom 5 combustion air can also get into the space 20 above the foot 15 and from there via the overflow channel 19 to the outlet opening 10.
  • the first arc section 6 can be cooled by means of the air flow prevailing in the overflow channel 19, whereby the occurring at the surface of the first arc section 6 high-temperature corrosion can be reduced. This leads to a further extension of the service life of the grate bar 1 according to the invention.
  • Fig. 3 shows an embodiment of a grate bar 1 according to the invention, which is designed for double-sided support on a support rod.
  • the in Fig. 3 shown grate bar also has a top 2, a bottom 5, an end face 3 and a rear longitudinal surface 4, wherein end face 3 and rear longitudinal surface 4 are mirror-symmetrical to each other.
  • Below the first and second arc sections 6, 8, a first or a second wear plates 7, 9 are arranged, which are spaced apart from the overlying first and second arc sections 6, 8.
  • the first and second wear plates 7, 9 are integrally formed on a central rib 11.
  • the center rib 11 also has recesses 13, in which connecting means are insertable to assemble a plurality of grate bars 1 to a grid.
  • the center rib 11 has support webs or cooling webs 12, via which it is supported relative to the upper side 2.
  • an outlet opening 10 is arranged on the upper side 2, via which escape from the underside 5 of incoming combustion air and can get into the lying on top of the kiln.
  • combustion rods 1 according to the invention are arranged relative to one another in such a way that the support part 21 comes to rest on a support rod, while the foot 15 comes to rest on the upper side of a grate rod adjacent to the end surface 3.
  • the second arc section 8 of the adjacent grate bar is hidden and is thus not exposed to high-temperature corrosion.
  • the first wear plate 7 can now first ensure that the functionality of the grate bar 1 is maintained.
  • the corrosively attacked first arc section 6 comes to rest in the rear region of the grate bar 1 and this is placed on the support section 14 on a support rod.
  • the attacked area of the grate bar 1 is shielded and is not exposed to any further high-temperature corrosion.
  • the service life of the grate bar according to the invention can be further increased.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)
  • Air-Flow Control Members (AREA)

Claims (9)

  1. Barreau de grille (1) refroidi par air destiné à être disposé dans une grille servant à la combustion d'un produit de combustion dans une installation de combustion, avec un côté supérieur (2) se prolongeant, au-dessus d'une première portion en arc de cercle (6), par une face frontale (3) et, au-dessus d'une deuxième portion en arc de cercle (8) ou d'inclinaisons, par une face longitudinale arrière (4), avec une ouverture de sortie (10) pour l'air de combustion s'écoulant à partir du bas, avec un côté inférieur (5), avec un pied (15) comprenant une surface d'appui et au moins une première plaque d'usure (7) disposée en dessous de la première portion en arc de cercle (6) se prolongeant par la face frontale (3), avec une première portion en arc de cercle (6) se trouvant au-dessus et étant éloignée de celle-ci, le pied (15) étant disposé de façon à former un espace (20), situé au-dessus, accessible à l'air de combustion s'écoulant à partir du bas, sur la face frontale (3), caractérisé en ce que la première plaque d'usure (7) est disposée, dans une disposition empêchant la chute de produit de combustion dans la zone en dessous du barreau de grille (1), lorsque la première portion en arc de cercle (6) est rouillée, en dessous de la première portion en arc de cercle (6) située au-dessus de celle-ci et en ce que, sur le côté supérieur (2), se trouve l'ouverture de sortie (10) perméable pour l'air de combustion s'écoulant à partir du côté inférieur (5).
  2. Barreau de grille selon la revendication 1, une deuxième plaque d'usure (9) étant disposée en dessous de la deuxième portion en arc de cercle se prolongeant par la face longitudinale arrière (4) ou d'inclinaisons (8), est disposé, à une certaine distance de la deuxième portion en arc de cercle (8) située au-dessus de celle-ci.
  3. Barreau de grille selon la revendication 2, la deuxième plaque d'usure (9) étant disposée à une certaine distance de la deuxième portion en arc de cercle (8) située au-dessus de celle-ci.
  4. Barreau de grille selon la revendication 2 ou 3, celui-ci comprenant une nervure centrale (11), qui est reliée au côté supérieur (2) et sur laquelle sont fixées ou moulées la première et la deuxième plaques d'usure (7, 9).
  5. Barreau de grille selon la revendication 4, celui-ci comprenant des traverses de protection (12), au-dessus desquelles la nervure centrale (11) est appuyée contre le côté supérieur (2).
  6. Barreau de grille selon l'une des revendications 4 ou 5, la nervure centrale (11) comprenant au moins un évidement (13), dans lequel, pour la liaison de deux barreaux de grilles disposés l'un à côté de l'autre, un moyen de liaison, plus particulièrement un barreau de liaison, peut être inséré.
  7. Barreau de grille selon l'une des revendications précédentes, celui-ci comprenant au moins une partie d'appui (14) avec laquelle le barreau de grille (1) peut être posé sur un barreau d'appui (18).
  8. Barreau de grille selon l'une des revendications précédentes, celui-ci étant conçu d'une seule pièce.
  9. Barreau de grille selon l'une des revendications 1 à 7, la première et la deuxième plaques d'usure (7, 9) comprenant une résistance à la corrosion contre la corrosion à haute température supérieure à la première ou la deuxième portion en arc de cercle (6, 8) située au-dessus de celle-ci.
EP10008873.1A 2009-09-23 2010-08-26 Barreau de grille Active EP2306086B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10008873T PL2306086T3 (pl) 2009-09-23 2010-08-26 Rusztowina

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200910042722 DE102009042722A1 (de) 2009-09-23 2009-09-23 Roststab

Publications (3)

Publication Number Publication Date
EP2306086A2 EP2306086A2 (fr) 2011-04-06
EP2306086A3 EP2306086A3 (fr) 2013-02-20
EP2306086B1 true EP2306086B1 (fr) 2017-12-27

Family

ID=42831582

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10008873.1A Active EP2306086B1 (fr) 2009-09-23 2010-08-26 Barreau de grille

Country Status (7)

Country Link
EP (1) EP2306086B1 (fr)
DE (1) DE102009042722A1 (fr)
DK (1) DK2306086T3 (fr)
PL (1) PL2306086T3 (fr)
PT (1) PT2306086T (fr)
RU (1) RU2010139008A (fr)
TR (1) TR201802367T4 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202011005341U1 (de) 2011-04-15 2014-05-20 Wvt Breiding Gmbh Modularer Roststab, Auflageelement, Brennbahnelement und Fußelement dafür sowie Vorschubrost einer Verbrennungsanlage
DE102011100369A1 (de) 2011-04-15 2012-10-18 Wvt Breiding Gmbh Modularer Roststab, Auflageelement, Brennbahnelement und Fußelement dafür sowie Vorschubrost einer Verbrennungsanlage
DE102014004660A1 (de) * 2014-02-10 2015-08-13 Joachim Kümmel Verfahren zur Verbrennung von Abfall und Biomassen auf einem luftgekühlten Rost sowie Vorrichtung zur Durchführung des Verfahrens
DE102014008858A1 (de) 2014-06-16 2015-12-17 Joachim Kümmel Verfahren zur Verbrennung von Abfall und Biomassen auf einem Flossenwand-Stufenrost sowie Vorrichtung zur Durchführung des Verfahrens

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH652476A5 (de) * 1983-05-20 1985-11-15 Theodor Koch Roststab.
ATE43004T1 (de) * 1984-05-21 1989-05-15 Theodor Koch Ofen, insbesondere zur verbrennung von muell, kohle, holz und industrieabfaellen.
US6422161B2 (en) * 1995-03-23 2002-07-23 Theodor Koch Combustion grate and process for optimizing its operation
DE19528310A1 (de) * 1995-08-02 1997-02-06 Abb Management Ag Rost für eine Feuerungsanlage
DE20111804U1 (de) 2001-07-16 2001-09-27 WVT Breiding GmbH, 58239 Schwerte Rost und Roststäbe
DE102004032291B4 (de) 2004-07-03 2006-07-13 Lurgi Lentjes Ag Rostplatte

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2306086A2 (fr) 2011-04-06
DE102009042722A1 (de) 2011-03-24
PL2306086T3 (pl) 2018-06-29
DK2306086T3 (en) 2018-04-09
RU2010139008A (ru) 2012-03-27
EP2306086A3 (fr) 2013-02-20
TR201802367T4 (tr) 2018-03-21
PT2306086T (pt) 2018-03-06

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