EP0103202B1 - Roststab für Rostbeläge, insbesondere von Feuerungen - Google Patents

Roststab für Rostbeläge, insbesondere von Feuerungen Download PDF

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Publication number
EP0103202B1
EP0103202B1 EP83108115A EP83108115A EP0103202B1 EP 0103202 B1 EP0103202 B1 EP 0103202B1 EP 83108115 A EP83108115 A EP 83108115A EP 83108115 A EP83108115 A EP 83108115A EP 0103202 B1 EP0103202 B1 EP 0103202B1
Authority
EP
European Patent Office
Prior art keywords
grate bar
grate
fins
channels
cover plate
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.)
Expired
Application number
EP83108115A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0103202A1 (de
Inventor
Johannes Josef Edmund 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
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0103202A1 publication Critical patent/EP0103202A1/de
Application granted granted Critical
Publication of EP0103202B1 publication Critical patent/EP0103202B1/de
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 grate coverings, in particular for furnaces, with an air-cooled cavity which is delimited by the grate bar back, the grate bar head, a transverse rib opposite the grate bar head, two longitudinal outer ribs and a lower cover plate connecting the outer ribs, and by cooling ribs arranged on the grate bar bridges is divided into individual channels, the grate bar having at least one inlet opening in its rear area, which is assigned to the transverse rib, and at least one air outlet opening provided in an outer rib in the vicinity of the grate bar head, and wherein the channels have essentially straight longitudinal axes and in the area of the grate bar head in open a common collecting space, which is provided with the air outlet opening.
  • the cavity of the grate bar is only divided by a few ribs, so that relatively wide channels are created.
  • the grate diarrhea entering the grate bar interior through the air outlet opening can therefore slide largely unhindered due to the oblique installation position of the grate bar on the cover plate up to the air inlet opening and leave the grate bar again via this opening.
  • the cross section of the air ducts is forcibly narrowed as a result. There is therefore a risk of clogging of these air ducts due to the grate diarrhea, as a result of which the cooling effect is impaired or canceled.
  • the object of the invention is to design a grate bar of the type described in the introduction in such a way that, despite an improved cooling effect, the risk of clogging due to grate diarrhea is avoided.
  • the flow cross-section for the grate diarrhea is increased, since at least the first two channels which are closest to the air outlet opening form an enlarged channel in the lower region, because the cooling fin separating them does not reach the cover plate.
  • the shortening of the cooling fin thus enables larger particles, which would get stuck in a narrow air duct, in the area under the cooling fin, i. H. can move between the cooling fin and the cover plate and thus freely reach the air inlet opening through which they can leave the grate bar.
  • the invention thus enables a higher cooling fin density with narrower channels to improve the heat dissipation, as a result of which the flow velocity in these channels is increased and thus the heat transfer is improved without there being a risk of clogging due to the grate diarrhea.
  • the cooling fins closer to the outlet opening are at a greater distance from the grate rod head than that cooling fins located further away from the outlet opening.
  • the adjacent channels connect with each other, it is at these openings or interruptions in the turbulence of the air flow and thus the heat transfer from the cooling fin - improved to the air flowing therethrough.
  • particles that slide in the channels to the air inlet opening can be distributed through these openings to adjacent channels, thereby further reducing the risk of blockages.
  • the partial fins separated from one another by interruptions can be inclined with respect to the longitudinal axis of the grate bar in a further embodiment of the invention.
  • a particularly favorable improvement in the heat transfer and also an improvement in a possible change of the grate diarrhea from one channel to the adjacent is achieved in a further embodiment of the invention in that the partial ribs have different angles of attack with respect to the longitudinal axis of the grate bar.
  • the partial ribs are designed as pegs, the degree of swirling of the air flowing therethrough is further increased.
  • the central cooling fin be free of openings and interruptions, which ensures that at least half the cavity of the grate bar is spared from such additives, since this continuous cooling fin forms a barrier to the grate diarrhea, which due to the openings from a channel to can walk to the next adjacent channel.
  • the discharge of the grate diarrhea from the grate bar is further improved on the basis of this division of the cover plate in that, in a further embodiment of the invention, the front part of the cover plate is inclined relative to the rear part, in the sense of forming an outlet chute for the grate diarrhea.
  • the inner cooling fins have a lower height than the outer fins.
  • the channels widen conically towards the rear, which can be achieved, for example, by different wall thicknesses of the cooling fins, then the cross section to the rear for the grate diarrhea entering the cavity of the grate bar becomes the air inflow opening which forms the outlet opening for the grate diarrhea , expanded.
  • the grate bar shown in FIGS. 1 to 3 has a grate bar bridge 1, a grate bar head 2, a cross rib 3 opposite the grate bar head in the vicinity of the rear end, and outer ribs 4 and 5 which, in conjunction with a cover plate 6, delimit a cavity 7 , which is divided into parallel channels 13 to 18 by cooling fins 8 to 12.
  • the transverse rib 3 which delimits the cavity 7 to the rear, has a lower height than the cooling ribs 10 to 12, on which the cover plate 6 rests, so that an air inlet opening 23 for the individual channels lies between the lower edge of the transverse rib 3 and the cover plate 6 13 to 18 is formed.
  • These channels 13 to 18 open into a common collecting space 19 in the area of the grate bar head 2, from which the air passes through an air outlet opening 20, which is provided in the outer rib 4, into the space between two grate bars, from where they pass through a narrow air gap in the Area of the grate bar head that remains between two adjacent grate bars, exits into the combustion chamber after it has previously been heated while the grate bar is cooling.
  • the outer rib 4 is offset inwards. This area is designated 4 '.
  • the cover plate 6 is due to the displacement of the outer rib to the outside beyond this, so that the falling through the mentioned narrow gap between two adjacent grate bars rust through, reach the cover plate 6 and from there via the air outlet opening 20 into the interior of the grate bar can.
  • the grate diarrhea initially falls into the collecting space 19 and is distributed from there to the individual channels between the cooling fins.
  • the channels 13 to 15 adjacent to the air outlet opening 20 are subjected to a greater degree of rust diarrhea because of their spatial proximity to this outlet opening than the channels 16 to 18 further away.
  • the cooling fins closer to the air outlet opening 20 have a larger one Distance 24 to the grate bar head than is the case with the cooling fins further away, d. H. the cooling fins closer to the outlet opening 20 are shorter.
  • the cooling fins 8 and 9 which are closer to the outlet opening 20 than the other cooling fins, have a lower height, so that a distance remains from the cover plate, which is indicated by the double arrow 21. Because of this lower height of the cooling fins 8 and 9, there is so much space up to the cover plate 6 that larger parts of the grate diarrhea can move in this area without clogging channels 13 to 15.
  • the cooling fins 8, 9 and 11, 12 are provided with openings or interruptions, which are each provided with the reference number 22. Only the central cooling fin 10 is free of such interruptions or breakthroughs and thus forms a barrier to the rust diarrhea so that it cannot pass from the duct 15 to the adjacent duct 16.
  • the channels 16, 17 and 18 are thus only subjected to less pressure from the front due to the grate diarrhea and because of their smaller distance from the grate rod head than the channels 13 to 15. As a result, they remain free of blockages even in the case of large quantities of particles falling through.
  • the middle rib 10 thus ensures that the transport of the grate diarrhea is essentially limited to the channels 13 to 15 due to the lack of transfer possibility, in order to deal with emergencies in which the channels 13 to 15 could become blocked despite the precautions taken Channels 16 to 18 remain free, so that at least half the grate bar is still subject to a sufficient cooling effect.
  • the grate diarrhea finally exits the grate bar from the air inlet opening 23.
  • the part of the grate bar, which extends from the transverse rib 3 to the rear, is not provided with channels, since this area is protected against excessive heat by the grate bar located above it.
  • the modification shown in Fig. 4 compared to the representation of Fig. 2 consists in that the partial ribs 8 'to 12' are inclined with respect to the longitudinal axis of the grate bar and with different angles of attack, so that they are not parallel to each other. This results in a stronger swirling of the air flowing through it.
  • the cover plate is divided into a front part 6 'and a rear part 6 ", the front part 6' having an inclination in the sense that an outlet opening 25 is formed at the separation point between the two parts and the
  • the front part 6 'assigned to the outlet opening 20 serves as an outlet chute for the grate diarrhea entering the interior of the grate bar and in particular into the collecting space 19.
  • FIG. 6 shows a further modified embodiment, in which the partial ribs 8 "to 12" are designed as pins, i. H. the ribs are shortened so much or interspersed with so many interruptions that only cones remain.

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)
  • Baking, Grill, Roasting (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
EP83108115A 1982-08-17 1983-08-17 Roststab für Rostbeläge, insbesondere von Feuerungen Expired EP0103202B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3230597 1982-08-17
DE3230597A DE3230597C1 (de) 1982-08-17 1982-08-17 Roststab fuer Rostbelaege,insbesondere von Feuerungen

Publications (2)

Publication Number Publication Date
EP0103202A1 EP0103202A1 (de) 1984-03-21
EP0103202B1 true EP0103202B1 (de) 1985-11-13

Family

ID=6171058

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83108115A Expired EP0103202B1 (de) 1982-08-17 1983-08-17 Roststab für Rostbeläge, insbesondere von Feuerungen

Country Status (4)

Country Link
US (1) US4672947A (da)
EP (1) EP0103202B1 (da)
JP (1) JPS5981415A (da)
DE (2) DE3230597C1 (da)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
JPH07508093A (ja) * 1992-05-19 1995-09-07 フラー　カンパニー 空気を制御した火格子板
DE19907944A1 (de) * 1999-02-25 2000-09-07 Saacke Gmbh & Co Kg Rostplatte für einen Vorschubrost
DE10163670A1 (de) * 2001-12-21 2003-07-03 Bbp Environment Gmbh Roststab für eine Schubrostfeuerung
US6964237B2 (en) * 2003-06-30 2005-11-15 Mark P. Hepp Grate block for a refuse incineration grate
JP2005159294A (ja) * 2003-09-18 2005-06-16 Nec Kagoshima Ltd 基板処理方法及びそれに用いる薬液
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
DE102014015916A1 (de) 2014-10-29 2016-05-04 Steinmüller Babcock Environment Gmbh Roststab und Rost für eine Schubrostfeuerung
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

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE598497C (de) * 1934-06-11 Julius Steinwandt Hohlroststab mit Luftfuehrung
US1481366A (en) * 1921-11-01 1924-01-22 Herkenrath Francisco Grate bar to burn pulverized coal
US2257287A (en) * 1939-06-01 1941-09-30 Comb Eng Co Inc Grate bar
US2745364A (en) * 1948-10-01 1956-05-15 Martin Johannes Josef Combustion air supply through grates and grate construction
DE959212C (de) * 1948-10-02 1957-02-28 Martin Joh Jos Dr Ing Aus luftgekuehlten Hohlroststaeben bestehender Rost
DE1301421B (de) * 1967-06-02 1969-08-21 Johannes Josef Dr Ing Rost fuer Grossfeuerungen mit luftgekuehlten Roststaeben
CH463678A (de) * 1967-06-02 1968-10-15 Johannes Josef Martin Rost für Grossfeuerungen mit luftgekühlten Roststäben
DE2806974C2 (de) * 1978-02-18 1980-01-31 Josef Martin Feuerungsbau Gmbh, 8000 Muenchen Roststab für Rostbeläge, insbesondere von Feuerungen

Also Published As

Publication number Publication date
JPS5981415A (ja) 1984-05-11
JPS6251365B2 (da) 1987-10-29
EP0103202A1 (de) 1984-03-21
US4672947A (en) 1987-06-16
DE3230597C1 (de) 1983-12-22
DE3361233D1 (en) 1985-12-19

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