EP1617143B1 - Barreau de grille, grille et incinerateur équipés dudit barreau - Google Patents

Barreau de grille, grille et incinerateur équipés dudit barreau Download PDF

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Publication number
EP1617143B1
EP1617143B1 EP05014330A EP05014330A EP1617143B1 EP 1617143 B1 EP1617143 B1 EP 1617143B1 EP 05014330 A EP05014330 A EP 05014330A EP 05014330 A EP05014330 A EP 05014330A EP 1617143 B1 EP1617143 B1 EP 1617143B1
Authority
EP
European Patent Office
Prior art keywords
grate
adjacent
grate panel
flow channel
channel
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.)
Not-in-force
Application number
EP05014330A
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German (de)
English (en)
Other versions
EP1617143A2 (fr
EP1617143A3 (fr
Inventor
Anton Esser
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.)
Doosan Lentjes GmbH
Original Assignee
Lurgi Lentjes AG
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 Lurgi Lentjes AG filed Critical Lurgi Lentjes AG
Priority to PL05014330T priority Critical patent/PL1617143T3/pl
Publication of EP1617143A2 publication Critical patent/EP1617143A2/fr
Publication of EP1617143A3 publication Critical patent/EP1617143A3/fr
Application granted granted Critical
Publication of EP1617143B1 publication Critical patent/EP1617143B1/fr
Not-in-force 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
    • 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
    • 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
    • F23H2900/00—Special features of combustion grates
    • F23H2900/03021—Liquid cooled grates

Definitions

  • the invention relates to a grate plate for a combustion grate, a grate formed from grate plates and a waste incineration plant with such a combustion grate.
  • the most important component of a waste incineration plant is the combustion grate, which is arranged horizontally or inclined and on which the firing material, for example refuse, is conveyed from a first end to a second end, usually Ausbrandrost.
  • the required combustion air is forced through the combustion grate.
  • corresponding openings are provided in the grate.
  • combustion grates there are several types of combustion grates, including but not limited to the so-called booster combustion grate.
  • a grate has moving parts (grate plates) which are suitable for carrying out scrubbing, whereby the kiln (the residue) is conveyed on the combustion grate.
  • the individual grate plates staggered in relation to each other in the region of their side facing the combustion chamber, lie on top of one another. If, for example, every second grate plate is movably arranged, it is achieved by the movement of this grate plate that the residue, which rests on the grate plate following in the transport direction, is transported on to the next grate plate.
  • RDF refuse derived fuel
  • the individual types of residue differ with regard to their calorific value. However, this also applies within the individual types of residues.
  • household waste may have a calorific value between 5 and 20 MJ / kg. Depending on this calorific value, the thermal and mechanical stress of the combustion grate or its grate plates changes.
  • An air-cooled combustion grate describes the EP 0 391 146 A1. At an assumed temperature in the combustion chamber of 900 ° - 1,250 ° C and a temperature in the resting on the combustion grate furnace layer of> 800 ° C, the temperature of these air-cooled grate plates on their surface, for example 400 ° - 600 ° C,
  • the grate plates with a liquid, especially water are cooled (EP 954 722 B1).
  • the procedural outlay for water cooling is significantly higher than for air cooling.
  • the more intensive water cooling leads to undesirably intensive cooling of the grate plates, in which the temperature at the surface of the grate plates can be 90 ° -110 ° C., at a temperature in the firing layer (on the combustion grate) of, for example, 700 ° -800 ° ° C.
  • EP 0921354 A1 shows a liquid-cooled grate plate having an upper side, a lower side, two longitudinal sides and two broad sides, which has a device for connecting a support element adjacent to a first longitudinal side and in which a plurality of air nozzles are arranged below and next to the second longitudinal side. Air is guided from an area below the grate plate through these nozzles, which are arranged approximately at the center of the second longitudinal side. In the area of the first longitudinal side, a section of a coolant channel runs.
  • the object of the invention is to provide a way to make the known systems variable in terms of their application.
  • each grate plate is above all to the firebox, so in particular exposed at its top and front end, a particularly intense heat load.
  • Primary air is directed against the underside of the grate plates, so it cools from below, and is forced through openings in the grate plates or between the grate plates in the lying on the grate plates Brenngut Anlagen.
  • the heat-loaded part of each grate plate is on the underside of a certain cooling volume to dissipate the heat generated. However, especially in the edge region, the cooling is insufficient.
  • Such areas for example, the combustion chamber facing end side (longitudinal side) of a grate plate, are therefore particularly susceptible to corrosion and erosion.
  • a first approach provides in this context, the area below the top and next to the front side longitudinal side of the grate plate with at least one flow channel, along the air from below targeted against the top or the adjacent front longitudinal side is performed.
  • this at least one flow channel is designed such that it has an air outlet opening on the portion of the corresponding end face (end face) adjacent to the underside, so that the air flow is then selectively directed to the surface of the grate plate following in the direction of transport of the material to be burned, and this surface likewise cools.
  • a channel which is traversed by a cooling medium such as a fluid and / or a gas.
  • the "back" part of the grate plate is intensively cooled with a liquid, while the same plate (rust stage) is cooled in the front part (the firing and combustion chamber adjacent) with air, with increased cooling effect over a known air cooling.
  • the "front" grate plate part can also be cooled conventionally with air, for example, instead of the air cooling along the flow channel air is simply guided from below against the grate plate in this section.
  • the rear part of the grate plate can also be cooled by pushing a gas, in particular air, through the channel.
  • a gas in particular air
  • the invention relates in its most general embodiment, a grate plate for a combustion grate with the features of claim 1.
  • the grate plate is formed below the top with a plurality of recesses extending from an area adjacent to the first longitudinal side to an area adjacent to the second longitudinal side and open to the bottom.
  • the flow channel or the flow channels extend according to an embodiment perpendicular to the longitudinal side of the grate plate.
  • the air flow along the flow channels extends in the direction of the front end surface of the grate plate.
  • the length of the flow channel can normally be limited to a length corresponding to 10-50% of the width of the grate plate, with a length between 10 and 30% or 10 and 20% usually sufficient. This is especially the section that is not swept over by a booster combustion grate. Accordingly, about 10 to 80% of the width of the grate plate is available for the formation of the channel, with 40 to 70% frequently being favorable. Basically, the areas in which the channel or the flow channel runs, could also overlap.
  • the channel can extend substantially over the entire length of the grate plate and extend between the broad sides helical or meander-shaped to increase the length of the cooling channel.
  • the supply and removal of the cooling medium takes place, for example, as described in EP 954 722 B1, reference is made to the.
  • a grate plate on the circumference no exact cuboid shape.
  • the front end face (second longitudinal side) therefore does not run perpendicular to the top of the grate plate. Rather, the second longitudinal side can extend at an angle ⁇ ⁇ 90 ° to the upper side and optionally additionally have at least one further bend.
  • the flow channel is not rectilinear, but follows the shape of the grate plate in this area, that is, for example - describes - on average - a semicircle or has several bends. In this way, at the same time results in an extension of the flow channel.
  • An intensification of the cooling is achieved when the flow channel is relatively close to the respective surface areas of the grate plate.
  • an upper (outer) boundary wall of the flow channel is formed by an (inner) surface of the upper side and an (inner) surface of the second longitudinal side.
  • a lower (inner) boundary wall for the flow channel can be formed by a rib which extends between walls or webs which form, for example, lateral boundaries of said recesses.
  • Is the underside of the grate plate also called rust level
  • rust level designed so that the top of the grate plate when resting the grate plate on a horizontal surface from the first longitudinal side to the second longitudinal side (ie from back to front) rising (slope, for example: 3-10 ° )
  • slope for example: 3-10 °
  • the corresponding grate plate with this paragraph is on the following in the direction of transport of the fuel grate plate (rust level).
  • its front longitudinal side terminates preferably at a distance from the upper side of the following grate plate, and correspondingly, the outlet opening of the flow channel is also above the contact surface of the following grate plate. In this way, the targeted flow of the surface of the adjacent grate plate is additionally favored. This too is illustrated and explained in the following description of the figures.
  • the additional cooling creates the possibility of making the sections of the grate plate which are adjacent to the flow channel thinner than the remaining sections of the grate plate. This not only saves material, but also increases the cooling effect.
  • This "thinner” section can refer not only to the front longitudinal side of the grate plate, but also to the adjacent portion of the top of the grate plate.
  • the other (first) part of the top of the grate plate, however, is “thicker", because in this section runs the channel.
  • Grate plates of the type mentioned have a width of 40-60 cm and a length of several meters.
  • grate bars may be castings, wherein the flow channel and the channel can be formed in-situ. Each section is thus one piece.
  • the sections (grate bars) can also be composed of sub-sections, especially if they are made of sheets be welded.
  • a grate bar for example, a width (in the longitudinal direction of the entire grate plate) of 30-100 cm, but also beyond.
  • connection of adjacent grate bars by means of known connection technology, for example by screwing or in that a plurality of grate bars are connected to each other via connecting rods. Groups of grate bars formed in this way can in turn be connected to each other analogously.
  • connection technology for example by screwing or in that a plurality of grate bars are connected to each other via connecting rods. Groups of grate bars formed in this way can in turn be connected to each other analogously.
  • constructive solutions are shown, which can also be seen how connections of channel sections of the grate bars flow-related.
  • the grate plates in such a way that at least one recess of two adjoining grate bars (sections) is formed, so a grate bar forms a part, for example, one half of the corresponding recess.
  • a flow channel can also be formed by two grate bars.
  • the invention further relates to a combustion grate, in particular a Schubverbrennungsrost, with a plurality of grate plates of the aforementioned type.
  • shear combustion grate includes all types of shear combustion grates, regardless of whether they are horizontal or inclined or the kiln is conveyed in one direction or the other.
  • shear combustion grate is also not limiting insofar as she decorations are detected in which, for example, every other grate plate is movably arranged, but also such grates in which more than a stationary grate plate are placed between grate plates that perform Schürhübe.
  • the invention comprises a waste incineration plant, for example a waste incineration plant, with a combustion grate of the aforementioned type.
  • the grate plate has an upper side 10, a lower side 12, a rear longitudinal side 14, a front longitudinal side 16 and correspondingly two broad sides, which can not be seen due to the sectional view.
  • the upper end face 10o of the upper side 10 is flat.
  • the front, second longitudinal side 16 is angled at an angle ⁇ (approximately 45 °) with respect to the surface 10o and then has an angling 16w.
  • the grate plate Adjacent to the first (rear) longitudinal side 14, the grate plate on the underside a longitudinally extending (in the plane) recess 18, in which a connector 19 is placed, which has a further recess 19o, in which a round rod 20 is located, on which the grate plate (indirectly) is supported.
  • a connector 19 Adjacent to the first (rear) longitudinal side 14, the grate plate on the underside a longitudinally extending (in the plane) recess 18, in which a connector 19 is placed, which has a further recess 19o, in which a round rod 20 is located, on which the grate plate (indirectly) is supported.
  • this round rod 20 With the help of this round rod 20, the grate plate shown in Figure 1 in the direction of arrow P is movable.
  • the connector 19 will be described later in detail.
  • each grate plate is formed with a plurality of juxtaposed recesses 22.
  • Each recess 22 is bounded laterally (parallel to the broad sides) of walls, in which case only one wall 24 can be seen.
  • the recess 22 is bounded by a corresponding portion 14a of the first longitudinal side and at the front (in a combustion chamber 26 facing) portion of the front (second longitudinal side) 16th
  • a wall 30 which has a substantially arcuate shape in the sectional view and at the front end, adjacent to the second longitudinal side 16, merges into a thickened portion 30v which projects beyond a lower end edge 16u of the front, second longitudinal side 16 and forms a support surface 30u for the grate plate.
  • This wall 30 forms a lower (inner) boundary wall of a flow channel 32 which extends from the lower end 16u of the second longitudinal side 16 parallel to the wall 30 (thus forming the inner surface of the longitudinal side 16 the other boundary for the flow channel 32) and in its further course is delimited by a lower surface 10u of the upper surface 10 before opening towards the underside 12 of the grate plate.
  • the wall 30 ends at the bottom End of the room 22; but he could also end earlier.
  • a funnel-like inflow opening 32 k for cooling air is provided, which is provided below the grate plate and the entire recess 22 flows against, including the area below the wall 30th
  • the part of the cooling air which is guided through the flow channel 32, symbolized by the arrow K.
  • the cooling air thus enters the flow channel 32 at the funnel-shaped end 32k and is then guided initially along the inner surface 10a of the upper side 10 and then along the inner surface 16i of the longitudinal side 16 before the cooling air emerges in the region of the opening 32o and on the upper side 10 'hits the adjacent grate plate (shown in phantom) and this flows.
  • the wall thickness of the grate plate there thinner than in the rear part can be formed, as the figure shows.
  • the thickness of the upper side 10 in the front part 10v is 6 or 8 mm. This applies analogously to the wall thickness of the second longitudinal side 16.
  • the grate plate is formed by a plurality of juxtaposed sections T1, T2 ..., which directly adjoin one another and are connected to one another. These cuts are also called grate bars.
  • the rear portion 10r of the top 10 is much thicker, for example 25-70 mm thick, to form the channel 40 therein.
  • the channel 40 extends substantially from one broad side of the grate plate to the opposite broad side, and alternately between the first longitudinal side 14 and the front portion 10v of the top. In other words, the channel runs in the region 10r of the upper side 10, which runs behind the part 10v in which the flow channel 32 is formed.
  • ports 40a for introducing and discharging a cooling medium are placed on an inner surface of the recess 18.
  • the connecting pieces 19 are fastened to the grate bars T1, T2 by screw connections 19v (FIG. 3).
  • the holes 36 shown in Figure 1 serve to receive rods for connecting adjacent sections T1, T2.
  • each grate bar T1, T2 is in one piece, that is, for example, the wall 30 extends materially to the wall 24th
  • grate bar for example T1 -in the direction of the longitudinal sides 14, 16 of the grate plate -comprises several flow channels 32 (here: seven) next to one another and correspondingly several (here: nine) walls 24. Two adjacent walls 24 each engage around the top 10 and the wall 30 a recess 22. On the outside, the grate bar ends in each case in the middle of the flow channel 32, so that together with a subsequent grate bar (Fig. 3) results in a closed further flow channel 32.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Gasification And Melting Of Waste (AREA)

Claims (15)

  1. Plaque à claire-voie pour une grille d'incinérateur rétractable, destinée à recevoir des matières à incinérer et formée par plusieurs plaques à claire-voie disposées en gradins en étant décalées les unes par rapport aux autres, comportant les caractéristiques suivantes :
    a) la plaque à claire-voie comporte une face supérieure (10), une face inférieure (12), deux faces longitudinales (14, 16) et deux faces latérales,
    b) la plaque à claire-voie, à proximité d'une première face longitudinale (14), comporte au moins un dispositif pour le montage d'un élément de support (20),
    c) au moins un canal d'écoulement (32) est réalisé en dessous et à côté de la deuxième face longitudinale (16) d'une deuxième partie voisine de la face supérieure (10),
    d) au moins un canal (40), dans lequel peut circuler un fluide de refroidissement, est réalisé au voisinage de la première face longitudinale (14) dans une première partie (10r) de la face supérieure (10),
    caractérisée en ce que,
    e) le canal d'écoulement (32) est réalisé de telle sorte que l'air peut être guidé le long du canal d'écoulement (32), depuis une zone en dessous de la plaque à claire-voie jusque vers une ouverture (32o) dans la partie (16u), adjacente à la face inférieure (12), de la deuxième face longitudinale (16), de telle sorte que le flux d'air est guidé ensuite sur la surface de la plaque à claire-voie suivante - dans la direction de transport des matières à incinérer - et refroidit également cette surface.
  2. Plaque à claire-voie selon la revendication 1, qui est configurée avec une pluralité d'évidements (22) en dessous de la face supérieure (10), lesquels s'étendent respectivement depuis une zone (14a) adjacente à la première face longitudinale (14) jusque dans une zone adjacente à la deuxième face longitudinale (16) et qui sont ouverts vers la face inférieure (12).
  3. Plaque à claire-voie selon la revendication 1, dont le canal d'écoulement (32) est orienté perpendiculairement aux faces longitudinales (14, 16) du barreau de grille.
  4. Plaque à claire-voie selon la revendication 1, dont le canal d'écoulement (32) a une longueur qui correspond à 10 jusqu'à 50 % de la longueur des faces latérales.
  5. Plaque à claire-voie selon la revendication 1, dans laquelle une cloison supérieure (extérieure) du canal d'écoulement (32) est formée par la face supérieure (10) et la deuxième face longitudinale (16).
  6. Plaque à claire-voie selon la revendication 1, dans laquelle une cloison (30) inférieure (intérieure) du canal d'écoulement (32) est formée par une nervure qui s'étend entre les parois (24) qui forment des délimitations latérales de l'évidement (22) correspondant.
  7. Plaque à claire-voie selon la revendication 1, dont la face inférieure (12), adjacente à la deuxième face longitudinale (16), est réalisée avec un talon (30v) en saillie vers le bas.
  8. Plaque à claire-voie selon la revendication 1, dont la face supérieure (10), dans sa deuxième partie (10v) adjacente au canal d'écoulement (32), est plus mince que dans la première partie (10r) recevant le canal (40).
  9. Plaque à claire-voie selon la revendication 1, dans laquelle la deuxième face longitudinale (16), dans sa partie adjacente au canal d'écoulement (32), est plus mince que la face supérieure (10) dans la première partie (10r) recevant le canal.
  10. Plaque à claire-voie selon la revendication 1, formée par plusieurs segments partiels (T1, T2) juxtaposés les uns aux autres dans la direction des faces longitudinales (14, 16) et assemblés les uns avec les autres.
  11. Plaque à claire-voie selon la revendication 1, dont le canal (40) s'étend en forme de méandres et sensiblement sur toute la longueur de la plaque à claire-voie.
  12. Plaque à claire-voie selon la revendication 1, dont le canal (40) peut être raccordé à une conduite d'admission et à une conduite d'évacuation du fluide de refroidissement.
  13. Plaque à claire-voie selon la revendication 1, dont le canal (40) s'étend avec ses tronçons orientés perpendiculairement aux faces longitudinales (14, 16) sur 10 à 80 % de la longueur des faces latérales.
  14. Grille d'incinérateur, en particulier grille d'incinérateur rétractable, comportant une pluralité de plaques à claire-voie selon l'une quelconque des revendications 1 à 13.
  15. Incinérateur de sous-produits comportant une grille selon la revendication 14.
EP05014330A 2004-07-15 2005-07-01 Barreau de grille, grille et incinerateur équipés dudit barreau Not-in-force EP1617143B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05014330T PL1617143T3 (pl) 2004-07-15 2005-07-01 Płyta rusztowa, przynależny ruszt paleniskowy i odpowiednia instalacja do spalania odpadów

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004034322A DE102004034322B4 (de) 2004-07-15 2004-07-15 Rostplatte

Publications (3)

Publication Number Publication Date
EP1617143A2 EP1617143A2 (fr) 2006-01-18
EP1617143A3 EP1617143A3 (fr) 2006-02-15
EP1617143B1 true EP1617143B1 (fr) 2007-01-03

Family

ID=35149140

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05014330A Not-in-force EP1617143B1 (fr) 2004-07-15 2005-07-01 Barreau de grille, grille et incinerateur équipés dudit barreau

Country Status (8)

Country Link
US (1) US20060011114A1 (fr)
EP (1) EP1617143B1 (fr)
JP (1) JP4231035B2 (fr)
CN (1) CN100582579C (fr)
AT (1) ATE350624T1 (fr)
DE (2) DE102004034322B4 (fr)
ES (1) ES2278360T3 (fr)
PL (1) PL1617143T3 (fr)

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CN102734806B (zh) * 2012-07-11 2015-05-27 光大环保科技发展（北京）有限公司 一种水冷往复多级液压机械式炉排炉及其控制方法
CN102878563B (zh) * 2012-09-12 2014-08-27 上海南一环保科技有限公司 一种多驱动高压损炉排式生活垃圾焚烧装置
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
JP2022538488A (ja) * 2019-07-05 2022-09-02 ヒタチ ゾウセン イノバ アクチェンゲゼルシャフト 燃焼火格子用の火格子ブロック
DE102019129171A1 (de) * 2019-10-29 2021-04-29 Alite Gmbh Roststab für Stufenrost
CN112393262A (zh) * 2020-11-19 2021-02-23 中科院过程工程研究所南京绿色制造产业创新研究院 一种储热式缓冲冷却往复炉排及其使用方法
WO2022118473A1 (fr) * 2020-12-04 2022-06-09 天翔 施 Grille de foyer et dispositif de grille de foyer
RU208878U1 (ru) * 2021-10-26 2022-01-19 Котельников Андрей Николаевич Решетка шамотная
KR102651844B1 (ko) * 2023-12-21 2024-03-27 비에이치아이 주식회사 소각 및 연소로용 수랭식 화격자

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DE19650742C1 (de) * 1996-12-06 1998-02-19 Metallgesellschaft Ag Mit Wasser gekühlter Verbrennungsrost
DE19753981C2 (de) * 1997-12-05 2000-04-06 Alstom Energy Syst Gmbh Flüssigkeitsgekühlte Rostplatte
EP0989363B2 (fr) * 1998-09-24 2003-12-10 Von Roll Umwelttechnik AG Barreau de grille
DE19860553C2 (de) * 1998-12-22 2001-03-29 Mannesmann Ag Flüssigkeitsgekühlter Verbrennungsrost
DE20111804U1 (de) * 2001-07-16 2001-09-27 Wvt Breiding Gmbh Rost und Roststäbe

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DE102004034322B4 (de) 2006-09-28
US20060011114A1 (en) 2006-01-19
JP2006029775A (ja) 2006-02-02
JP4231035B2 (ja) 2009-02-25
ES2278360T3 (es) 2007-08-01
EP1617143A2 (fr) 2006-01-18
PL1617143T3 (pl) 2007-08-31
CN100582579C (zh) 2010-01-20
ATE350624T1 (de) 2007-01-15
DE102004034322A1 (de) 2006-02-09
CN1721766A (zh) 2006-01-18
DE502005000277D1 (de) 2007-02-15
EP1617143A3 (fr) 2006-02-15

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