EP2487414B1 - Barreau de grille - Google Patents
Barreau de grille Download PDFInfo
- Publication number
- EP2487414B1 EP2487414B1 EP11153400.4A EP11153400A EP2487414B1 EP 2487414 B1 EP2487414 B1 EP 2487414B1 EP 11153400 A EP11153400 A EP 11153400A EP 2487414 B1 EP2487414 B1 EP 2487414B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- head
- grate
- grate bar
- ribs
- bar
- 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
Links
- 238000002485 combustion reaction Methods 0.000 claims description 33
- 230000008719 thickening Effects 0.000 claims description 20
- 238000001816 cooling Methods 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 2
- 230000000284 resting effect Effects 0.000 claims 2
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 238000002679 ablation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 239000002916 wood waste Substances 0.000 description 1
Images
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
- F23H3/04—Grates with hollow bars externally cooled, e.g. with water, steam or air
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H7/00—Inclined or stepped grates
- F23H7/06—Inclined or stepped grates with movable bars disposed parallel to direction of fuel feeding
- F23H7/08—Inclined or stepped grates with movable bars disposed parallel to direction of fuel feeding reciprocating along their axes
Definitions
- the present invention relates to a grate bar according to the preamble of claim 1, as in DE 20111804 U1 disclosed.
- combustion plants with combustion chambers are conventionally used, in which the fuel is applied, for example, to a mechanically operated grate and burned on it.
- Combustion plants are generally processed combustion material with high and low calorific value, so that in the grate elements used large heat-related problems can occur.
- the grate head region of the grate elements may burn due to excessive thermal stress or corrode.
- An object of the present invention is to provide a grate bar which has a long life.
- a grate bar for incinerators with a substantially closed, the combustion side facing surface, a rear, designed to rest on a grate support to form the grate support area and a front, rounded between the surface and front edge nose with a bottom formed on the support surface and from the bottom of the grate forming surface protruding cooling fins for air cooling, wherein a head part in the interior at least partially thickened formed head ribs for air cooling in the longitudinal direction and vertical direction below the combustion side facing surface.
- the head ribs are arranged in three or four layers, wherein between the layers in each case two or three recesses are arranged and wherein the layers follow in the direction of the interior of the head part following one another.
- a further embodiment is that the head ribs have two or more, preferably two, three or four thickenings arranged parallel to one another.
- a further embodiment according to the invention is that the head ribs are substantially trapezoidal and / or have funnel-shaped and / or angular and / or wedge-shaped thickening. It is conceivable to combine the shapes of the thickened head ribs arbitrarily as eg only angular thickening or in combination with any other shape.
- a further embodiment according to the invention is that in each case head slots are formed between a side wall and the head ribs. Due to the configuration of the head part with the head ribs or the intervening head slots, the heat or heat produced by the combustion process can be dissipated via a large cooling surface. The combustion air can circulate thanks to the head slots. The thermal wear takes place initially primarily at the head of the grate bar. Once the combustion surface of the head part has been removed by heat-related wear, the part behind it is available for further wear in the form of the trapezoidal thickenings of the head slots closed by incineration slag. Thanks to the head slots, a circulation of the combustion air and thus a cooling of the hot head part is made possible.
- the head slots a funnel, which is arranged within the head part and the funnel then opens into a tapered part of the head slot.
- the head ribs are arranged between a lateral end wall and extension-like head ribs and together form a comb-like structure.
- Yet another embodiment is that the head ribs are formed thickened approximately in the front third.
- Yet another embodiment is that at least a portion of the sidewall along the head portion has a recess.
- the grate bar has a back part, which is provided with at least one in the back part to the surface open longitudinal slot and wherein the cooling ribs protrude into the interior of the back part.
- the grate bar is made of metal.
- the grate bar is designed as a Wenderoststab, with a nose for the nose and headboard same rear nose and headboard.
- Wenderoststäbe can be turned at the end of the life of the first head part and thus the other head part can be used again over virtually the same period of operation.
- two symmetrically arranged with respect to the center of the grate bar bearing surfaces are formed on the underside.
- a further aspect of the invention relates to a grate for use in a grate firing of incinerators, wherein at least one transverse row with grate bars according to the invention is movably arranged in the grate and, following the first transverse row, a next transverse row with a grate bar is fixedly arranged to a grate bar according to the invention. This ensures that the Burning material can be moved continuously towards the combustion side.
- the grate bar overlaps the surface of a subsequent grate bar in an imbricated manner with its bearing surface.
- a plurality of grate bars are arranged with their longitudinal sides parallel to one another.
- FIG. 1 schematically shows a side section CC according to FIG. 7 a known grate bar 1 for an incinerator.
- Such grate bars or elements can be arranged side by side lying connected to virtually any width. It is conceivable that the grate bars are first arranged in a first transverse row parallel to each other with their longitudinal sides and following the first transverse row at least one further transverse row follows.
- the first transverse row may have fixed grate bars and the grate bars of the further transverse row are arranged movably. By moving the grate bars, the combustion material can be continuously transported toward the combustion side.
- One end 2 of the grate bar 1 is formed nose-like as a support portion 2 to be fixed in a combustion device in a conventional manner in a holder.
- the front end of the grate bar 1 has a rounded edge, respectively. Nose 3 with a front edge 3 'as a continuation of the overhead combustion surface 4.
- a surface 4 'below the combustion surface 4 in the interior of the grate bar 1 can form a further combustion surface as soon as the combustion surface 4 has been removed by heat-related corrosion.
- Supporting area 2 as well as nose 3 are formed such that grate bars 1 overlap scalyly overlapping, that is, in each case the bearing under the nose 3 bearing surfaces 5 are supported on the surfaces or overhead combustion surfaces 4 of the subsequent grate bars 1 resp. rest and thus form the grate surface of the incinerator.
- the grate bar has a transverse rib 6 and a back part 7.
- a region 8 between the front edge 3 'of the nose 3 and the transverse rib 6 forms a head part 8.
- FIG. 2 schematically represents a view according to FIG. 1
- the already too FIG. 1 introduced reference numerals correspond to the features of FIG. 1
- FIG. 2 a side wall 9 with recesses 10, 10 ', 20 "and mounting holes 11 for the connection of the individual grate bars shown.
- FIG. 3 represents a first enlarged section along a line EE according to FIG. 2
- the overhead combustion surface 4 is formed closed and goes in a lateral end wall 12 via.
- Head ribs 13, 13 ' are formed along a first portion A1 below the combustion surface 4 or, in other words, are formed as projections projecting below the combustion surface and projecting into the interior of the grate bar 1.
- the head ribs 13, initially extend in the longitudinal direction of the grate bar 1 and extend in the vertical direction.
- Head slots 14, 14 ' are formed between the head ribs 13, 13'.
- the head slots 14, 14 ' thus form grooves between the head ribs 13, 13'.
- the central head slot 14 ' has a slightly wider funnel 15' as compared to the two funnels 15 of the head slots 14 disposed adjacent each side.
- the head slots 14, 14 ' are open at the bottom.
- the head slots 14, 14 ' are arranged between the lateral end wall 12 and the head ribs formed as extensions 8 of the head part 13, 13' and form a comb-like structure in the interior of the head part 8.
- the funnels 15, 15 ' open into a tapered part 16, 16' of the corresponding head slots 14, 14 '.
- FIG. 4 is a second enlarged section along a line BB according to FIG. 2 , Cooling ribs 17 of the back part 7 of different expansions protrude into the interior of the grate bar 1. Between the cooling fins 17 spacings 18 are formed. Next, the side wall 9 is shown with the corresponding recess 10 ''.
- FIG. 5 represents a third enlarged section along a line AA FIG. 2
- the side wall 9 is pierced by the mounting opening 11.
- the Cooling ribs 17 are shown with the intervening distances 18, which protrude starting from the combustion surface 4 into the interior of the grate bar 1 in.
- FIG. 6 represents the enlarged head portion 8 of the known grate bar according to a section Z.
- FIG. 7 A second section A2 of the combustion surface 4 is formed without head ribs 13 13 'or without the intervening head slots 14, 14', ie the second section A2 forms an integral partial element of the head part 8.
- a third Section A3 with the trapezoidal head ribs 13, 13 'and the intermediate head slots 14, 14' is formed.
- the head ribs 13, 13 'or head slots 14, 14' extend in the direction of the transverse rib 6 and extend both in the longitudinal and in the vertical direction of the head part 8.
- the head slots 14 14 formed along an outer side of the head part 8 ' are each formed between the lateral end wall 12 and the corresponding head rib 13.
- a funnel-shaped inlet 19, 19 ' is formed in the respective head slot 14, 14'.
- the head slot 14, 14 'in each case has the tapered part 16, 16', which opens into a funnel-shaped outlet 20, 20 '.
- a part 22, 22 'of the head ribs 13, 13' formed substantially as a trapezoidal thickening.
- FIG. 7 is a plan view of the known grate bar 1. It is the head part 8 with the head slots 14, 14 'and the head ribs 13, 13' and the back part 7 with the cooling fins 17 and the intervening distances 18 shown. In this case, the head slots 14, 14 'and the distances 18 in the longitudinal direction of the grate bar 1 one behind the other and are connected to each other. In the combustion process, the temperature in the head part 8 is highest for air-cooled grate bars and the heat-related wear is greatest. By providing a large cooling surface of the comb-like structure of the head ribs 13, 13 'and circulation of the combustion air in the head slots 14, 14', the heat can be dissipated. Is the second section A2 (see FIG.
- FIG. 8a schematically represents a side section of a head portion 8 'of a grate bar according to the invention.
- a first layer 23 for removal by heat corrosion is shown, which is at least partially formed by the combustion surface 4.
- a second layer 24 and a third layer 25 can be seen.
- the second layer 24 and the third layer 25 are formed by the thickened head ribs 13, 13 '.
- a first recess 26 educated.
- a second recess 27 lies between the second layer 24 and the third layer 25.
- the second layer 24 follows in the direction of the interior of the further head part 8 'following the first layer 23.
- the third layer 25 is adjacent to the second layer 24 in the direction of the interior of the other head part 8 'arranged. Following the third layer 25, the central head slot 14 'is shown.
- These three layers 23, 24, 25 for erosion by heat corrosion allow the grate bar according to the invention to have a longer service life, because the two further layers 24, 25 are still available for further ablation due to heat-related ablation of the first layer 23, ie thermal wear are available.
- FIG. 8b represents, schematically, a supervision FIG. 8a
- the three layers 23, 24 and 25 are shown.
- the second and third layers 24, 25 have angled thickenings 28, 28 ', 29, 29' on the head ribs 13, 13 '.
- the angular thickenings 28, 28 ', 29, 29' protrude from the corresponding head rib 13, 13 'into the interior of the further head part 8'.
- the first recess 26 is followed by the first recess 26, followed by the second recess 24 following the first recess 26.
- the second recess 27 is again arranged on the second layer 24, followed by the third layer 25 following the third layer 25 runs the head slot 14 '.
- the centrally disposed thickening 28 ', 29' in comparison to the side extending therefrom thickening 28, 29 formed about twice as thick. Between the angular thickenings 28, 28 ', 29, 29' is in each case the corresponding head slot 14, 14 '.
- FIG. 9a schematically shows a side section of a still further head portion 8 "of a grate bar according to the invention. In this case, the three layers 23, 24 and 25 with the recesses 26, 27 are shown.
- FIG. 9b represents, schematically, a supervision FIG. 9a
- the second layer 24 has funnel-shaped thickenings 30, 30 'and the third layer 25 has angularly formed thickenings 31, 31'.
- FIG. 10a schematically represents a side section of a still further head portion 8 '''of a grate bar according to the invention.
- three layers 23, 24 and 25 are shown.
- a fourth layer 32 connects to the third layer 25 toward the interior of the still further head part 8 '".
- a further recess 33 is formed between the third layer 25 and the fourth layer 32.
- FIG. 10b represents, schematically, a supervision FIG. 10a
- the second layer 24 has wedge-shaped thickenings 34, 34 'and the third layer 25 has angled thickenings 35, 35'.
- the fourth layer 32 with likewise angular thickenings 36, 36 'represents. This allows a particularly long life of the grate bar according to the invention.
- FIGS. 1 to 10b correspond in each case the same technical features of the corresponding figure.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Incineration Of Waste (AREA)
Claims (13)
- Barreau de grille (1) pour installations d'incinération comprenant une surface (4) essentiellement fermée, orientée vers le côté de combustion, une zone de support (2) arrière réalisée pour venir se poser sur un support de grille pour former la grille, et un nez (3) avant arrondi entre la surface (4) et le bord avant (3'), comprenant une surface d'appui (5) réalisée sur la face inférieure et comprenant des ailettes de refroidissement (17) en saillie depuis la face inférieure de la surface formant la grille pour le refroidissement à l'air, une partie de tête (8) présentant, à l'intérieur, des ailettes de tête (13, 13') réalisées au moins partiellement épaissies pour le refroidissement à l'air dans le sens longitudinal et dans le sens vertical sous la surface (4) orientée vers le côté de combustion, caractérisé en ce que les ailettes de tête (13, 13') sont installées en trois ou quatre couches (23, 24, 25, 32), dans lequel entre les couches (23, 24, 25, 32) il est agencé à chaque fois deux ou trois renfoncements (26, 27, 33), les couches se succédant vers l'intérieur de la partie de tête (8').
- Barreau de grille (1) selon la revendication 1, caractérisé en ce que les ailettes de tête (13, 13') présentent deux ou plus, de préférence deux, trois ou quatre épaississements (22, 22' ; 28, 28' ; 29, 29' ; 30, 30' ; 31, 31' ; 34, 34' ; 35, 35' ; 36, 36') agencés de façon parallèle entre eux.
- Barreau de grille (1) selon la revendication 1 ou 2, caractérisé en ce que les ailettes de tête (13, 13') présentent des épaississements essentiellement en forme de trapèze (22, 22') et/ou d'entonnoir (30, 30') et/ou de carré (28, 28' ; 29, 29' ; 31, 31' ; 34, 34' ; 36, 36') et/ou de coin (35, 35').
- Barreau de grille (1) selon l'une des revendications 1 à 3, caractérisé en ce que des fentes de tête (14, 14') sont réalisées entre une paroi latérale (9) et les ailettes de tête (13, 13').
- Barreau de grille (1) selon l'une des revendications 1 à 4, caractérisé en ce que les fentes de tête (14, 14') présentent un entonnoir (15, 15') qui se situe dans la partie de tête (8) et en ce que l'entonnoir (15, 15') débouche ensuite dans une partie réalisée rétrécie (16, 16') de la fente de tête (14, 14'), les fentes de tête (14, 14') étant agencées entre une paroi frontale latérale (12) et les ailettes de tête (13, 13') de type saillie et forment ensemble une structure de type peigne.
- Barreau de grille (1) selon l'une des revendications 1 à 5, caractérisé en ce que les ailettes de tête (13, 13') sont réalisées épaissies approximativement sur le tiers avant.
- Barreau de grille (1) selon l'une des revendications 1 à 6, caractérisé en ce qu'au moins une partie de la paroi latérale (9) présente un renfoncement (10, 10', 10") le long de la partie de tête (8).
- Barreau de grille (1) selon l'une des revendications 1 à 7, caractérisé en ce que le barreau de grille (1) présente une partie arrière (7) qui est munie au moins d'une fente longitudinale ouverte en surface (4) dans la partie arrière (7), les ailettes de refroidissement (17) faisant saillie à l'intérieur de la partie arrière (7).
- Barreau de grille selon l'une des revendications 1 à 8, caractérisé en ce que le barreau de grille (1) est en métal.
- Barreau de grille selon l'une des revendications 1 à 9, caractérisé en ce qu'il est réalisé sous la forme d'un barreau de grille réversible, avec un nez avant (3) et une partie de tête (8) pouvant être inversés pour avoir un nez arrière et une partie de tête.
- Grille destinée à être utilisée dans un feu à grille d'installations d'incinération, caractérisée en ce qu'au moins une rangée transversale avec un barreau de grille (1) selon l'une des revendications 1 à 10 est agencée dans la grille de façon mobile et en ce qu'à la suite de la première rangée transversale, il est agencé fixement une autre rangée transversale avec un barreau de grille (1) selon l'une des revendications 1 à 10.
- Grille selon la revendication 11, le barreau de grille (1) avec sa surface d'appui (5) venant chevaucher de façon décalée à la manière d'écailles un barreau de grille (1) suivant.
- Grille selon l'une des revendications 11 ou 12, caractérisée en que plusieurs barreaux de grille (1) sont agencés parallèlement entre eux avec leurs côtés longitudinaux.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11153400.4A EP2487414B1 (fr) | 2011-02-04 | 2011-02-04 | Barreau de grille |
RU2013140667/06A RU2013140667A (ru) | 2011-02-04 | 2012-01-05 | Колосник |
US13/983,120 US20130306050A1 (en) | 2011-02-04 | 2012-01-05 | Grate bar |
EP12700216.0A EP2671026A1 (fr) | 2011-02-04 | 2012-01-05 | Barreau de grille |
CN2012800074057A CN103354889A (zh) | 2011-02-04 | 2012-01-05 | 炉条 |
PCT/EP2012/050156 WO2012104111A1 (fr) | 2011-02-04 | 2012-01-05 | Barreau de grille |
JP2013552145A JP2014507621A (ja) | 2011-02-04 | 2012-01-05 | 火格子棒 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11153400.4A EP2487414B1 (fr) | 2011-02-04 | 2011-02-04 | Barreau de grille |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2487414A1 EP2487414A1 (fr) | 2012-08-15 |
EP2487414B1 true EP2487414B1 (fr) | 2016-11-02 |
Family
ID=44141206
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11153400.4A Active EP2487414B1 (fr) | 2011-02-04 | 2011-02-04 | Barreau de grille |
EP12700216.0A Withdrawn EP2671026A1 (fr) | 2011-02-04 | 2012-01-05 | Barreau de grille |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12700216.0A Withdrawn EP2671026A1 (fr) | 2011-02-04 | 2012-01-05 | Barreau de grille |
Country Status (6)
Country | Link |
---|---|
US (1) | US20130306050A1 (fr) |
EP (2) | EP2487414B1 (fr) |
JP (1) | JP2014507621A (fr) |
CN (1) | CN103354889A (fr) |
RU (1) | RU2013140667A (fr) |
WO (1) | WO2012104111A1 (fr) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
DE102014015916A1 (de) * | 2014-10-29 | 2016-05-04 | Steinmüller Babcock Environment Gmbh | Roststab und Rost für eine Schubrostfeuerung |
CN106439868A (zh) * | 2016-08-17 | 2017-02-22 | 光大环保技术研究院(深圳)有限公司 | 一种水冷炉排片和焚烧炉 |
US10309648B2 (en) | 2016-11-22 | 2019-06-04 | General Electric Company | System and method for active cooling of a grate bar for an incinerator of a waste-to-energy plant |
CN110686263B (zh) * | 2019-10-09 | 2023-12-22 | 科能亚太铸造(武汉)有限公司 | 一种焚烧装置用炉条 |
EP4303492A1 (fr) * | 2022-07-07 | 2024-01-10 | Babcock & Wilcox Vølund A/S | Élément de grille à plaques pour une grille mobile d'un four |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB262277A (en) * | 1925-12-18 | 1926-12-09 | Johannes Vervoort | Improvements in fire-bars for furnace grates |
DE3521266A1 (de) * | 1985-06-13 | 1986-12-18 | Walter Josef Dipl.-Ing. 8000 München Martin | Roststab fuer einen feuerungsrost einer grossfeuerung und feuerungsrost fuer diese grossfeuerung |
DK0391146T3 (da) * | 1989-04-03 | 1993-11-15 | Abb Management Ag | Forbrændingsanlæg til forbrænding af brændselsmateriale, navnlig af affald |
GB2290608B (en) * | 1994-06-16 | 1998-02-11 | British Gas Plc | Fuel fired burners |
US6422161B2 (en) * | 1995-03-23 | 2002-07-23 | Theodor Koch | Combustion grate and process for optimizing its operation |
DE20111804U1 (de) * | 2001-07-16 | 2001-09-27 | WVT Breiding GmbH, 58239 Schwerte | Rost und Roststäbe |
-
2011
- 2011-02-04 EP EP11153400.4A patent/EP2487414B1/fr active Active
-
2012
- 2012-01-05 RU RU2013140667/06A patent/RU2013140667A/ru not_active Application Discontinuation
- 2012-01-05 US US13/983,120 patent/US20130306050A1/en not_active Abandoned
- 2012-01-05 WO PCT/EP2012/050156 patent/WO2012104111A1/fr active Application Filing
- 2012-01-05 JP JP2013552145A patent/JP2014507621A/ja active Pending
- 2012-01-05 CN CN2012800074057A patent/CN103354889A/zh active Pending
- 2012-01-05 EP EP12700216.0A patent/EP2671026A1/fr not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
EP2487414A1 (fr) | 2012-08-15 |
EP2671026A1 (fr) | 2013-12-11 |
JP2014507621A (ja) | 2014-03-27 |
RU2013140667A (ru) | 2015-03-10 |
CN103354889A (zh) | 2013-10-16 |
WO2012104111A1 (fr) | 2012-08-09 |
US20130306050A1 (en) | 2013-11-21 |
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