EP2003396A2 - Elément de grille - Google Patents

Elément de grille Download PDF

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Publication number
EP2003396A2
EP2003396A2 EP08165650A EP08165650A EP2003396A2 EP 2003396 A2 EP2003396 A2 EP 2003396A2 EP 08165650 A EP08165650 A EP 08165650A EP 08165650 A EP08165650 A EP 08165650A EP 2003396 A2 EP2003396 A2 EP 2003396A2
Authority
EP
European Patent Office
Prior art keywords
grate
grate element
section
cross
air inlet
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.)
Withdrawn
Application number
EP08165650A
Other languages
German (de)
English (en)
Other versions
EP2003396A3 (fr
Inventor
Ernst Schenkel
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2003396A2 publication Critical patent/EP2003396A2/fr
Publication of EP2003396A3 publication Critical patent/EP2003396A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F23H3/02—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 water-cooled grate element according to the preamble of independent claim 1 and a manufacturing method according to the preamble of claim 4.
  • the large incinerators which are used for example for thermal energy generation or waste incineration, have for receiving and combustion of the solids to be recycled so-called feed grids on which the combustion material is moved through the combustion chamber.
  • This feed grates are made up of a variety behind and next to each other arranged grate elements, also called grate bars or grate plates together, which are firmly connected.
  • the thermal expansion is absorbed by arranged at the ends of the rows of grate expansion boxes. In the bars are openings for the supply of combustion air.
  • these grate elements are mostly used in large combustion plants with constantly changing composition of the combustion material, eg in waste incineration plants, the demands on their performance are very high. For example, consider that these incinerators are constantly charged with goods that differ by their specific gravity, their calorific value, their air permeability, the moisture content, etc., so it is easy to see that such gratings are often exposed to very high temperatures and require unusual technical effort, if you want to achieve the desired service life with optimal combustion process. Due to the heat released during the combustion process, the grate elements are constantly exposed to both chemical corrosion and mechanical wear and must be constantly cooled to achieve an acceptable life, the cooling should if possible ensure optimum heat distribution in the grate element, so that local overheating be avoided in the grate element.
  • EP 1 219 898 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 block body and the cooling channel formed in the form of a pipe are thus here two separate parts, which are subjected to different expansion. Due to the arrangement of the Cooling channel between the block body and a holding part arranged below the same, the heat transfer is limited from the outset, so that the pipe must be embedded in this intermediate layer in a thermally conductive material, which involves an additional manufacturing effort and hinders the heat transfer between the pipe and the grate block. In addition, the complete ventilation is in question.
  • the European patent application EP 0 921 354 A1 describes a liquid-cooled grate plate with an attached coolant channel.
  • the coolant connection is arranged approximately centrally between the edges of the grate plate.
  • the coolant channel can be formed by a mold core during casting of the grate body in this.
  • the entire description gives the expert no clues as to how this could be realized in practice, especially since the separate attachment of a cooling tube is shown as a particularly cost-effective and safe production. Again, in view of the unfavorable water flow at extremely low flow cross-section with poor ventilation and thus air bag formation in the rectangular, angular deflection zones must be expected.
  • the German utility model G 94 16 320.0 shows a grate bar, in which various parallel sections of a coolant channel are integrated, wherein the sections are interconnected by deflections.
  • This embodiment of the coolant guide has the particular disadvantage that only very small flow cross-sections can be realized and the problem of venting is not solvable.
  • the European patent application EP 0 757 206 A2 describes for cooling the grate bars mounted on the underside, coolant-flow-through hollow profiles, which should be designed as half-tubes or with an oval cross-section. Again, due to the numerous, for example, from Fig. 10 apparent rectangular and sharp-edged deflection zones in addition to the difficult venting possibility, the formation of air bags in the deflection can not be avoided.
  • the US Pat. No. 2001/0003266 A1 shows a grate element consisting of two chambers, wherein the cooling chamber - delimitation on the underside of the grate element is carried out by a corrugated sheet, which must be subsequently inserted into the prefabricated cast body, which severely affects the uniformity of the heat-related expansion over the entire grate element.
  • curvatures in the cooling chamber boundary are described on the underside of the grate element (paragraph 0039), through which the occurring Thermal stresses are to be reduced.
  • the opening connecting the cooling passages is obviously much smaller than each of the individual cooling passages, which causes the flow velocity to increase in this region, thereby restricting the heat transfer from the vulnerable end region of the grate element and preventing complete venting.
  • the cooling channel partition wall is pulled into the radius or even beyond, so that complete ventilation and flow around is impossible.
  • the one in there Fig. 5 with the position 43 marked cooling channel is limited to a minimum passage in the lower region of the end face.
  • the heat that is introduced in the front section of the surface, in the radius and in the upper region of the frontal surface, can not be optimally transported here due to the large accumulation of material here. Due to the different temperatures in the structure of the entire casting, thermal stresses can occur, which can lead to cracking and thus leaks.
  • the European patent application EP 0 811 804 A2 Techform Engineering GmbH shows a grate element for incineration plants, according to which at least one Räumvorsprung for the air outlet of the assembled in the assembled state above the grate element is fixed on the top of the grate element.
  • the inventive solution now provides, in contrast to the prior art, a real - meandering - cooling water guide in which the cooling water is not vortexed in the first place, but is deliberately guided. In addition to be avoided by this special shape of the cooling water channel, the formation of air sacs in the deflection and corner areas and along the channel edges.
  • the two are parallel, in In the opposite direction flowed through cooling water ducts by a front in the direction of material flow, ie frontal transition section larger flow cross-section; in this most exposed to the heat exposed front grate element section results in a maximum cooling effect and better ventilation.
  • FIG. 1 shows the designated in its entirety by 1, created as a monoblock casting grate element in a view from below, in which the grate element on one side on a arranged in the axis AA support 9 (FIG. Fig. 4 ) rests.
  • the opposite side of the grate element has a plurality of supports 2, with which the grate element 1 in a known manner loosely slidably rests on the underlying.
  • the in Fig. 1 represented grate element 1 thus turned by 180 ° to imagine.
  • this operating position of the grate element shows the view from above Fig. 2 a cooling water inlet opening 3 and a cooling water outlet opening 4, through which the cooling water flowing through the grate elements enters the grate element, absorbs heat within it and leaves it again.
  • Fig. 3 shows, the cooling water entering through the opening 3 flows through the grate element in two practically parallel channels K1, K2 in opposite directions.
  • the two channels are interconnected. Strictly speaking, the currents are in the two Channels K1, K2 but anything but parallel: how Fig.
  • the interior of the grate element is divided by a central web 5 and from this web as well as the opposite walls 6 and 7 protrude into the interior of the channels K1, K2 guiding and deflecting 8.
  • These are in principle of approximately triangular cross section with generous rounded corners E ( Fig. 2 ).
  • the length of the deflecting members 8 projecting from the walls 6 and 7 or from the central web 5 into the flow is, according to one embodiment, dimensioned such that they preferably extend at least from one of the walls 6, 7 or from the center web 5 via the channel axis BB (FIG. Figure 3 ) protrude.
  • the deflecting members 8 may be formed by the skilled person with any, practice-oriented cross-sectional shapes.
  • a preferred cross-section is that of the equilateral triangle, but for example semicircular, elliptical and quadrangular cross-sections are also possible.
  • the deflecting 8 in the flow of the cooling channel projecting turbulence-generating elements here have the deflecting 8 the main task to form a targeted guided, preferably meandering cooling water channel in which the formation of unwanted air bubbles can be avoided with certainty.
  • the connecting cooling channel Ü in the transition zone is constructed so that the frontal surface and the overlying radius on the one hand completely vented and also completely filled with water.
  • the walls are all the same thickness in this area, so that the heat transfer into the cooling medium can take place completely and evenly. The same applies to the surface of the grate element adjoining the radius.
  • the Transition region Ü an optimized cross-section on.
  • the cross section of this transitional region Ü is at least 1.5 times that of each individual cooling channel K1, K2.
  • the triangular deflecting members 8 may have, for example, in their free end portion an angle of 20 to 40 °, preferably 30 °.
  • the walls delimiting the cooling channels, as already mentioned, of the same, or approximately the same, thickness.
  • the grate element described can advantageously be cast in one pass. This ensures that the coefficient of thermal expansion is the same throughout the element at all points. This feature now, in combination with the approximately constant wall thickness, that the heat-related expansion of the grate element is uniformly distributed over the entire grate element. Heat-induced stresses are thus practically excluded.
  • Fig. 4 shows three successively arranged grate elements 1a, 1b, 1c, which are respectively supported on rod-shaped support 9.
  • the cooling water passes via supply lines 10 in the grate elements and is discharged on the opposite side again.
  • Every second row of grate elements, in this case the row of grate elements 1b, is movably mounted and subjected to a periodical reciprocating motion by means of a drive, by means of which, on the one hand, a scouring effect and, on the other hand, a cleaning effect is achieved.
  • the upper element glides with the in Fig. 1 with 2 designated supports on the underlying element.
  • each grate element has on its underside air inlet openings 11, through which the required combustion air flows into the interior of the firebox.
  • free-space 12 are formed, which protrude beyond the boundary surface of each grate element and in the periodic movement of each second row of grate elements are pushed into the air inlet openings 11 of the adjacent element to clean them of the accumulated combustion residues.
  • the total cross section of the air inlet opening 11 associated Abstreifnase or Abstreifnasencoveres 12a is therefore smaller than the entire cross section of the air inlet opening 11 in any case. Thanks to this measure Materialanballitch can now be avoided in the air inlet openings with certainty.
  • the same is preferably poured as a single casting in a single pass.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)
  • Furnace Details (AREA)
  • Paper (AREA)
  • Silicon Compounds (AREA)
  • Tunnel Furnaces (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Freezing, Cooling And Drying Of Foods (AREA)
  • Processing Of Solid Wastes (AREA)
EP08165650A 2005-09-06 2006-08-10 Elément de grille Withdrawn EP2003396A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH14522005 2005-09-06
EP06016746A EP1760400B1 (fr) 2005-09-06 2006-08-10 Elément de grille avec refroidissement à liquide

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP06016746A Division EP1760400B1 (fr) 2005-09-06 2006-08-10 Elément de grille avec refroidissement à liquide
EP06016746.7 Division 2006-08-10

Publications (2)

Publication Number Publication Date
EP2003396A2 true EP2003396A2 (fr) 2008-12-17
EP2003396A3 EP2003396A3 (fr) 2012-11-07

Family

ID=35686542

Family Applications (2)

Application Number Title Priority Date Filing Date
EP06016746A Active EP1760400B1 (fr) 2005-09-06 2006-08-10 Elément de grille avec refroidissement à liquide
EP08165650A Withdrawn EP2003396A3 (fr) 2005-09-06 2006-08-10 Elément de grille

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP06016746A Active EP1760400B1 (fr) 2005-09-06 2006-08-10 Elément de grille avec refroidissement à liquide

Country Status (4)

Country Link
EP (2) EP1760400B1 (fr)
AT (1) ATE420323T1 (fr)
DE (1) DE502006002556D1 (fr)
PL (1) PL1760400T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011050865A1 (fr) 2009-10-28 2011-05-05 Synthon B.V. Procédé pour la fabrication de la forme cristalline a du linézolide
WO2012019862A1 (fr) 2010-08-11 2012-02-16 Synthon B.V. Procédé pour fabriquer du linézolid
EP2690100A1 (fr) 2010-08-11 2014-01-29 Synhton B.V. Proécdé pour la préparation de Linezolid
WO2014071990A1 (fr) 2012-11-09 2014-05-15 Synthon Bv Procédé de production de linézolide

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2677016T3 (es) 2011-09-01 2018-07-27 Ernst Schenkel Rejilla para la combustión de materiales sólidos
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
EP3967927A1 (fr) 2020-09-09 2022-03-16 Hitachi Zosen Inova AG Bloc de grille refroidi par eau pour une installation d'incinération

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0757206A2 (fr) 1995-08-02 1997-02-05 Asea Brown Boveri Ag Grille pour un foyer
DE19607007C1 (de) 1996-02-24 1997-03-06 Noell Abfall & Energietech Rost mit Reinigungseinrichtungen
EP0811804A2 (fr) 1996-06-04 1997-12-10 MARTIN GmbH für Umwelt- und Energietechnik Elément de grille et grille pour incinérateur
EP0921354A1 (fr) 1997-12-05 1999-06-09 ALSTOM Energy Systems GmbH Plaque de grille refroidie par liquide
US20010003266A1 (en) 1995-03-23 2001-06-14 Theodor Koch Combustion grate and process for optimizing its operation
EP1219898A1 (fr) 2000-12-29 2002-07-03 Von Roll Umwelttechnik AG Bloc de grille faisant partie d' une grille pour une installation d' incinération de déchets

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE498538C (de) * 1930-05-23 L & C Steinmueller Wassergekuehlter Treppenrost
CH608090A5 (en) * 1976-06-09 1978-12-15 Barkhuus Per W Grate for combustion hearth of a furnace for waste incineration
DE4400992C1 (de) * 1994-01-14 1995-05-11 Noell Abfall & Energietech Roststab und Rost mit Kühleinrichtung
JPH0933016A (ja) * 1995-07-18 1997-02-07 Kubota Corp ゴミ焼却炉

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010003266A1 (en) 1995-03-23 2001-06-14 Theodor Koch Combustion grate and process for optimizing its operation
EP0757206A2 (fr) 1995-08-02 1997-02-05 Asea Brown Boveri Ag Grille pour un foyer
DE19607007C1 (de) 1996-02-24 1997-03-06 Noell Abfall & Energietech Rost mit Reinigungseinrichtungen
EP0811804A2 (fr) 1996-06-04 1997-12-10 MARTIN GmbH für Umwelt- und Energietechnik Elément de grille et grille pour incinérateur
EP0921354A1 (fr) 1997-12-05 1999-06-09 ALSTOM Energy Systems GmbH Plaque de grille refroidie par liquide
EP1219898A1 (fr) 2000-12-29 2002-07-03 Von Roll Umwelttechnik AG Bloc de grille faisant partie d' une grille pour une installation d' incinération de déchets

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, no. 06, 1997

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011050865A1 (fr) 2009-10-28 2011-05-05 Synthon B.V. Procédé pour la fabrication de la forme cristalline a du linézolide
WO2011051384A1 (fr) 2009-10-28 2011-05-05 Synthon Bv Procédé de fabrication d'une forme cristalline a de linézolide
WO2012019862A1 (fr) 2010-08-11 2012-02-16 Synthon B.V. Procédé pour fabriquer du linézolid
EP2690100A1 (fr) 2010-08-11 2014-01-29 Synhton B.V. Proécdé pour la préparation de Linezolid
WO2014071990A1 (fr) 2012-11-09 2014-05-15 Synthon Bv Procédé de production de linézolide

Also Published As

Publication number Publication date
EP1760400B1 (fr) 2009-01-07
DE502006002556D1 (de) 2009-02-26
EP1760400A3 (fr) 2007-07-18
EP2003396A3 (fr) 2012-11-07
ATE420323T1 (de) 2009-01-15
PL1760400T3 (pl) 2009-08-31
EP1760400A2 (fr) 2007-03-07

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