EP0206174A2 - Barreau à feu pour une grille d'un chauffage de grande dimension et grille pour un tel chauffage - Google Patents

Barreau à feu pour une grille d'un chauffage de grande dimension et grille pour un tel chauffage Download PDF

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Publication number
EP0206174A2
EP0206174A2 EP86108120A EP86108120A EP0206174A2 EP 0206174 A2 EP0206174 A2 EP 0206174A2 EP 86108120 A EP86108120 A EP 86108120A EP 86108120 A EP86108120 A EP 86108120A EP 0206174 A2 EP0206174 A2 EP 0206174A2
Authority
EP
European Patent Office
Prior art keywords
grate
blow
grate bar
out openings
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.)
Granted
Application number
EP86108120A
Other languages
German (de)
English (en)
Other versions
EP0206174B1 (fr
EP0206174A3 (en
Inventor
Walter Josef Dipl.-Ing. Martin
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
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0206174A2 publication Critical patent/EP0206174A2/fr
Publication of EP0206174A3 publication Critical patent/EP0206174A3/de
Application granted granted Critical
Publication of EP0206174B1 publication Critical patent/EP0206174B1/fr
Expired 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

Definitions

  • the invention relates to a grate bar for a firing grate of a large furnace with an air flow-through cavity open from below for the air inlet of the combustion air, which extends into a projection protruding from the grate bar level, and with an air outlet arranged in the projection into the combustion layer.
  • the invention also relates to a firing grate for large combustion plants, which is constructed from grate bars according to the invention.
  • Grate furnaces on the one hand, require a surface of the firing grate that is as closed as possible in order not to let any fuel or other combustion products, such as ashes, fall through, and on the other hand should be as air permeable as possible in order to distribute the atmospheric oxygen as evenly as possible over the entire combustion surface.
  • the object of the invention is to enable as uniform a distribution as possible of the combustion air to be introduced into the material to be burned through the firing grate and to largely rule out the risk of the blow-out openings becoming blocked.
  • a grate bar according to the preamble of claim 1 in that the projection is tapered towards its free end and / or has a smaller width than the grate bar and that the air outlet comprises at least two blow-out openings, their blow-out direction lies in a plane that is perpendicular to the grate bar bridge and forms an angle of 80 ° to 90 ° with the grate bar longitudinal axis.
  • the combustion air enters the fuel layer through many small blow-out openings transverse to the flow of the fuel. Since at least two blow-out openings are provided on each projection, the size of the openings can be reduced compared to the known configuration mentioned above, in which only one blow-out opening directed towards the end of the firing grate can be reduced the without the total amount of air passing through is reduced.
  • This also has the advantage that the distribution of the air introduced into the burning layer is more uniform and, because of the smaller blow-out openings, also results in a higher flow resistance, which results overall in a more uniform air distribution with a preferred blowing direction transverse to the burning layer.
  • the reduction in the size of the blow-out openings also reduces the possibility of them becoming blocked.
  • the blowing direction can be at an angle to the horizontal, an angle of attack being possible both obliquely downwards and obliquely upwards.
  • the blow-out direction can have an angle with respect to the vertical because of the measure according to claim 1, since the blow-out direction lies in a plane that can enclose an angle of 80 ° to 90 ° with the grate bar longitudinal axis.
  • the blow-out openings can be as smooth-walled nozzles or as Nozzles with a wall structure intended to generate a swirling air flow.
  • the dimension of the blow-out opening in the grate bar longitudinal direction can be smaller than transverse to it.
  • At least two projections can be provided in the region of the grate bar head in a further embodiment of the invention. If, in a further embodiment of the invention, the blow-out openings of the same and / or adjacent projection are offset from one another, there is no mutual interference of the emerging air jets and, moreover, the air is distributed over a larger area. The increase in the number of blow-out openings leads to finer air jets with an overall same air throughput and thus to an equalization of the air entering the combustion layer.
  • blow-out openings can be provided on each side of a projection in a further embodiment of the invention.
  • the improvement in the uniformity of the exiting air is increased by the larger number of blow-out nozzles and the reduction in the risk of clogging results from the fact that the blow-out openings in their cross-sectional dimensions can be reduced with the same amount of air passing through, which reduces the risk of parts penetrating into these blow-out openings.
  • the mutual displacement of the air jets can be brought about with the same arrangement of the projections with respect to the grate bar by moving the blow-out openings or with symmetrical formation of the blow-out openings within the projections by moving the projections.
  • blow-out openings are tapered from the inside of the grate rod, the possibility of parts penetrating from the burning layer into the blow-out opening is hereby reduced.
  • the invention also relates to a firing grate for large combustion systems with individual grate steps overlapping one another in the manner of scales, consisting of grate bars lying next to one another, according to one of claims 1 to 9, and is characterized in that the mutually opposite blow-out openings of adjacent grate bars are offset from one another in order to prevent the air jets from influencing one another .
  • adjacent grate bars are preferably positively coupled to one another in the direction perpendicular to the grate bar back.
  • lifting of individual grate bars within the grate bar step is avoided, which is important in order to achieve the uniform distribution mentioned at the outset, because by lifting a grate bar, a short-circuit flow occurs from the underside of the firing grate into the combustion layer, since the air is under the raised grate bar can emerge and no longer through the blow-out openings provided for this purpose.
  • This protection is not always necessary, but if certain fuels are used, a grate bar can be raised under unfavorable conditions if the grate bars a grate step are not coupled with each other.
  • the type of coupling mentioned can also be designed so that the grate bars can move relative to one another in their longitudinal direction.
  • a firing grate is constructed from a plurality of grate bars 1, each of which a plurality of grate bars lying parallel to one another form a grate step and the entire firing grate is constructed from a plurality of grate steps which overlap in a scale-like manner.
  • the grate bars 1 have channels 3, in which air flows, which serves to cool the grate bars and then as combustion air into the combustion layer exit.
  • the air enters the channels 3 from below, for which the grate bar is either completely open as in FIG. 2 or, as shown in FIG. 3, has a cover 6 in the rear area, not shown in the drawing, where the grate bar is attached to a supporting structure is provided with an inflow opening. After flowing through the channels 3, the air then passes through blow-out openings 7 into the burning layer which rests on the grate bars.
  • the blow-out openings 7 are located in projections 2, which protrude above the grate bars and form pressure bodies between which and the end faces 5 of the subsequent grate bars, for example, pieces of slag can be crushed when the grate bars perform a stoking movement, these moving from grate bar to grate bar of the subsequent stage always done in opposite directions.
  • This opposite movement is achieved in that one grate bar can be fixed, while the grate bar above or below is moved relative to the fixed grate bar. An opposite movement of two successive grate levels is also possible.
  • the blowing direction of the blow-out openings 7 runs essentially in a plane lying transversely to the grate bar longitudinal axis, this plane being essentially perpendicular to the grate bar bridge, and, as indicated in FIG. 4, can also be set at different angles to the horizontal.
  • the blow-out direction can be oriented obliquely downwards, upwards or to a small extent forwards or backwards, since the blow-out direction does not have to run exactly transverse to the longitudinal axis of the grate, but can also deviate by up to 10 ° with respect to this exact transverse direction.
  • the blowout Openings 7 can be designed as simple through holes or as nozzles tapering from the inside, as shown in FIG. 4 on the far left. The latter embodiment has the advantage that parts which nevertheless penetrate into the blow-out opening get into the grate rod interior and from there downwards more easily due to the inward widening, as a result of which the blow-out opening is free again.
  • the grate bars according to FIGS. 4 and 5 have two or three projections 2, each of which has at least one pair of blow-out openings 7 directed in opposite directions.
  • These blow-out openings are arranged in such a way that opposing jets are not directly opposed to one another, because the blow-out openings are either offset or set at different angles, so that a direct collision of air currents with opposing blow-out nozzles is avoided.
  • the arrangement in the projections is such that the same effect also occurs with neighboring grate bars, i.e. the opposite blow-out openings of adjacent grate bars are mutually offset, as shown in FIG. 5.
  • the blow-out openings can have different shapes, it being expedient to design each cross-sectional shape in such a way that it is possible in the longitudinal direction of the grate bar has very small opening width.
  • the openings can also be designed so that they give the emerging air a twist.
  • Fig. 5 shows that the projections, in particular on the grate bar sides, can be tapered, their base being as wide as the grate bar bridge.
  • the projections can also be set back with respect to the side edge of the grate bar bridge, as is the case with the grate bar shown on the far right in FIG. 5.
  • the projections are set back from the side edge of the grate bar and the blow-out direction is drawn at an angle with respect to the vertical, which ensures that the air emerging from the blow-out openings does not appear directly on the opposite blow-out opening.
  • the projections can be designed as desired.
  • each grate bar on the grate bar head near the end face 5 has an opening 8 on one side and a projection 9 on the other opposite side, which engage in the assembled state of the grate bars in such a way that adjacent ones Grate bars of a grate level are coupled to one another, which means that a single grate bar cannot be lifted off.
  • Another type of coupling is shown in FIG. 6, namely that all outer ribs of the grate bars have through-openings 10 which are aligned with one another in the assembled state.
  • a coupling bolt 11 inserted into these aligned openings of two adjacent grate bars prevents lifting of a single grate bar.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)
  • Baking, Grill, Roasting (AREA)
  • Solid-Fuel Combustion (AREA)
  • Detergent Compositions (AREA)
  • Furnace Charging Or Discharging (AREA)
EP86108120A 1985-06-13 1986-06-13 Barreau à feu pour une grille d'un chauffage de grande dimension et grille pour un tel chauffage Expired EP0206174B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853521266 DE3521266A1 (de) 1985-06-13 1985-06-13 Roststab fuer einen feuerungsrost einer grossfeuerung und feuerungsrost fuer diese grossfeuerung
DE3521266 1985-06-13

Publications (3)

Publication Number Publication Date
EP0206174A2 true EP0206174A2 (fr) 1986-12-30
EP0206174A3 EP0206174A3 (en) 1987-05-13
EP0206174B1 EP0206174B1 (fr) 1989-05-24

Family

ID=6273213

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86108120A Expired EP0206174B1 (fr) 1985-06-13 1986-06-13 Barreau à feu pour une grille d'un chauffage de grande dimension et grille pour un tel chauffage

Country Status (8)

Country Link
US (1) US4719900A (fr)
EP (1) EP0206174B1 (fr)
JP (1) JPS6249113A (fr)
BR (1) BR8602751A (fr)
CA (1) CA1263276A (fr)
DE (2) DE3521266A1 (fr)
DK (1) DK164928C (fr)
ES (1) ES296927Y (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2599817A1 (fr) * 1986-06-04 1987-12-11 Mediterranee Const Navales Ind Barreau de grille de combustion ou d'incineration
WO2012104111A1 (fr) * 2011-02-04 2012-08-09 Seko-Patent Gmbh Barreau de grille

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4876972A (en) * 1987-01-21 1989-10-31 Louis Mrklas Grate bar element for a sliding grate furnace for garbage incineration
FR2616885B1 (fr) * 1987-06-17 1989-09-22 Mediterranee Const Navales Ind Barreau de grille de combustion ou d'incineration, notamment de grille a mouvement de recul
JPH0717937Y2 (ja) * 1990-05-21 1995-04-26 日本鋼管株式会社 横型焼却炉の火格子構造
DE4105330C1 (fr) * 1991-02-18 1992-08-06 Noell - K + K Abfalltechnik Gmbh, 4040 Neuss, De
JPH0546813U (ja) * 1991-12-07 1993-06-22 花王株式会社 物品の搬送装置
JPH0624536A (ja) * 1992-07-08 1994-02-01 Nippon Mektron Ltd 搬送用歯付プ−リ
KR100226989B1 (ko) * 1996-11-27 1999-10-15 장병주 스토커식 소각로의 화격자 마모 방지 시스템
DE59800363D1 (de) * 1997-10-29 2001-01-04 Doikos Investments Ltd Verfahren zum Verbrennen von Feststoffen auf einem wassergekühlten Schub-Verbrennungsrost, sowie Rostplatte und Rost zur Ausübung des Verfahrens
DE19851471A1 (de) * 1998-11-09 2000-05-11 Mitteldeutsche Feuerungs Und U Durchfallarmer Vorschubrostbelag
AU2004237886B2 (en) 1999-05-21 2007-10-25 Barlow Projects, Inc. Improved mass fuel combustion system
US6981455B2 (en) * 2002-03-08 2006-01-03 Lefcort Malcolm D Two-stage wet waste gasifier and burner
FR2885403A1 (fr) * 2005-05-03 2006-11-10 Saretco Sa Barreau de grille et grille pour foyer a gradins solidaires
FR2885404A1 (fr) * 2005-05-03 2006-11-10 Saretco Sa Barreau de grille et grille pour foyer a gradins solidaires avec combustion a air dirige
CN100507364C (zh) * 2007-08-01 2009-07-01 重庆科技学院 分段驱动复合式炉排系统
CN102374542A (zh) * 2011-07-25 2012-03-14 福建省丰泉环保控股有限公司 带左自旋转燃烧气流的新型焚烧炉排片
KR200471741Y1 (ko) 2013-12-17 2014-03-11 용호금속(주) 소각로용 화격자 유닛
DE102014015916A1 (de) 2014-10-29 2016-05-04 Steinmüller Babcock Environment Gmbh Roststab und Rost für eine Schubrostfeuerung
ES2964850T3 (es) * 2015-06-12 2024-04-09 Hitachi Zosen Inova Ag Bloque de rejilla para una rejilla de combustión
ES3010084T3 (en) * 2020-09-09 2025-04-01 Kanadevia Inova Ag Grate block with rising lug

Family Cites Families (21)

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Publication number Priority date Publication date Assignee Title
DE600459C (de) * 1934-07-23 Bongard Oscar Roststab
DE547656C (de) * 1932-04-02 Alfred Rossow Vorschubrost mit Unterwindbetrieb mit schraeg nach hinten und oben den Brennstoff foerdernden Rostgliedern, die abwechselnd vor- und zurueckbewegt werden
US966233A (en) * 1909-05-12 1910-08-02 Carl Nordell Furnace.
US1481366A (en) * 1921-11-01 1924-01-22 Herkenrath Francisco Grate bar to burn pulverized coal
US1542910A (en) * 1921-11-25 1925-06-23 Core H Reid Fuel-burning grate
FR552780A (fr) * 1922-06-12 1923-05-07 Barreau de grille pour brûler surtout du poussier de charbon
US2745364A (en) * 1948-10-01 1956-05-15 Martin Johannes Josef Combustion air supply through grates and grate construction
FR1076466A (fr) * 1952-04-28 1954-10-27 Bayer Ag Préparation de soufre
DE970380C (de) * 1955-02-23 1958-09-11 Moeller Johannes Vorrichtung zum Kuehlen von Zementklinker
CH463678A (de) * 1967-06-02 1968-10-15 Johannes Josef Martin Rost für Grossfeuerungen mit luftgekühlten Roststäben
DE1301421B (de) * 1967-06-02 1969-08-21 Johannes Josef Dr Ing Rost fuer Grossfeuerungen mit luftgekuehlten Roststaeben
JPS4729807U (fr) * 1971-04-26 1972-12-05
GB1492722A (en) * 1975-02-13 1977-11-23 Peters Ag Claudius Pusher grate plate
JPS52101727A (en) * 1976-02-20 1977-08-26 Takuma Co Ltd Step type hollow stoker
DE2805712C2 (de) * 1978-02-10 1980-01-31 Josef Martin Feuerungsbau Gmbh, 8000 Muenchen Roststab, insbesondere für mechanisch bewegte Schürroste von Großfeuerungen
JPS5855979Y2 (ja) * 1979-07-24 1983-12-22 東急車輌製造株式会社 排気ブ−ス用均一給気装置
JPS5838274U (ja) * 1981-09-04 1983-03-12 上福　悟 フロ−ト・スイツチを具備した電気ウキ
CH669447A5 (fr) * 1982-05-13 1989-03-15 Von Roll Ag
JPS5824720A (ja) * 1982-07-12 1983-02-14 Takuma Co Ltd 階段式中空スト−カ
DE3230597C1 (de) * 1982-08-17 1983-12-22 Johannes Josef Edmund 1000 Berlin Martin Roststab fuer Rostbelaege,insbesondere von Feuerungen
FR2574160A1 (fr) * 1984-11-30 1986-06-06 Electricite De France Grille de foyer realisee a partir d'elements permettant un controle ameliore de l'apport en air primaire

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2599817A1 (fr) * 1986-06-04 1987-12-11 Mediterranee Const Navales Ind Barreau de grille de combustion ou d'incineration
WO2012104111A1 (fr) * 2011-02-04 2012-08-09 Seko-Patent Gmbh Barreau de grille
EP2487414A1 (fr) * 2011-02-04 2012-08-15 Seko-Patent GmbH Barreau de grille
CN103354889A (zh) * 2011-02-04 2013-10-16 塞科专利有限公司 炉条

Also Published As

Publication number Publication date
DK164928B (da) 1992-09-07
ES296927U (es) 1988-02-16
ES296927Y (es) 1988-11-16
CA1263276A (fr) 1989-11-28
JPS6249113A (ja) 1987-03-03
DE3521266A1 (de) 1986-12-18
DK164928C (da) 1993-01-25
BR8602751A (pt) 1987-02-10
EP0206174B1 (fr) 1989-05-24
US4719900A (en) 1988-01-19
DK276786D0 (da) 1986-06-12
EP0206174A3 (en) 1987-05-13
DE3521266C2 (fr) 1988-12-15
DK276786A (da) 1986-12-14
JPH0359329B2 (fr) 1991-09-10
DE3663586D1 (en) 1989-06-29

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