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EP0206174B1 - Roststab für einen Feuerungsrost einer Grossfeuerung und Feuerungsrost für diese Grossfeuerung - Google Patents

Roststab für einen Feuerungsrost einer Grossfeuerung und Feuerungsrost für diese Grossfeuerung Download PDF

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Publication number
EP0206174B1
EP0206174B1 EP86108120A EP86108120A EP0206174B1 EP 0206174 B1 EP0206174 B1 EP 0206174B1 EP 86108120 A EP86108120 A EP 86108120A EP 86108120 A EP86108120 A EP 86108120A EP 0206174 B1 EP0206174 B1 EP 0206174B1
Authority
EP
European Patent Office
Prior art keywords
grate
grate bar
air
blowing out
out openings
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
EP86108120A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0206174A2 (de
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
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 EP0206174A2 publication Critical patent/EP0206174A2/de
Publication of EP0206174A3 publication Critical patent/EP0206174A3/de
Application granted granted Critical
Publication of EP0206174B1 publication Critical patent/EP0206174B1/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 a grate of a large furnace with an air-flowed cavity, open from below for the air inlet of the combustion air, which extends into a protrusion protruding from the grate bar level in the head region of the grate bar, which tapers towards its free end is carried out and / or has a smaller width than the grate bar, the individual grate bars of the firing grate being movable relative to one another in their longitudinal direction and the air escaping into the burning layer in the head region of the grate bar.
  • the invention relates to a grate for large combustion, which is constructed from grate bars according to the invention.
  • a grate bar of the type described at the outset is known from DE-B-1 301 421.
  • a grate constructed from such grate bars fulfills the requirement for the surface of the firing grate to be as closed as possible so that no fuel or other combustion products, such as ash, can fall through, but with such a grate the air escapes into the combustion layer essentially in the vertical direction, because the air from the nozzle gaps between the grate bars reaches the burning layer and can therefore essentially only be directed upwards. With wide grate bars, this can lead to an uneven air distribution in the combustion layer and, moreover, lighter constituents of the fuel, such as are produced in combustion plants, can be blown out of the combustion layer.
  • every second grate bar is raised relative to the grate bar back surface of its adjacent grate bars and is provided in its grate bar side flank with air outlet slots which extend over the entire length of the grate bar or over a part thereof.
  • air outlet openings are provided to the front and to the rear, with respect to the grate longitudinal axis.
  • the air slots provided in the side of the grate side allow air to be supplied in the lateral direction, but large slots tend to become blocked, particularly because of the low air velocities in them.
  • 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.
  • the combustion air essentially enters the fuel layer transversely to the flow of the fuel. Since the air outlet is only provided in the projection, the size of the blow-out openings, compared to the known design mentioned above, in which there are air slots in the side flanks and in the head region, must be considerably smaller for reasons of space. This has the advantage that with a stoking movement of the grate bars, the risk of fuel penetrating into the blow-out openings is significantly lower than with blow-out openings whose blow-out direction extends in the longitudinal direction of the grate bar and also significantly less than when extending over the entire side length of the grate bar Blow out slots.
  • the air pressure must be increased significantly with the same amount of air, which reduces the risk of clogging due to the higher air speed.
  • the higher air outlet speed results in better air distribution, i.e. a greater depth of penetration in the fuel layer.
  • Another essential advantage that results from the outflow direction transverse to the fuel flow is that lighter parts of the fuel are not blown off in the direction of the grate end.
  • blow-out openings are provided in a projection and this is a grate bar that is provided for a poker grate, in which the grate bars mutually perform stoking movements, circulation of the combustion layer is brought about by the projection, so that a particularly good supply of the combustion layer is brought about is ensured with combustion air, because it can enter a burning layer loosened by the projection.
  • 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 openings can be designed as smooth-walled nozzles or as nozzles with a wall structure intended for generating 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 the air is also distributed over a larger area. The increase in the number of blow-out openings leads to finer air jets with an overall 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 exit 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 circumstances if the grate bars of a grate level are not coupled to one another.
  • 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 in parallel next 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 exits the combustion layer as combustion air.
  • the air enters the channels 3 from below, for which the grate bar is either completely open as in FIG. 2 or has a cover 6 as shown in FIG. 3, 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 downward, upward or to a lesser extent forward or rearward, since the blow-out direction is not exactly transverse to the longitudinal axis of the grate bar must, but can also differ from this exact transverse direction by up to 10 °.
  • the blow-out 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, are easier to get into the grate rod interior and from there downwards 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 do not face each other directly, because the blow-out openings are either offset or set at different angles, so that a direct collision of air streams from 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 offset from one another, 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 has the smallest possible opening width in the longitudinal direction of the grate bar.
  • 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. Otherwise, the projections can be designed in any way.
  • 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 a single grate bar from being lifted off.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)
  • Solid-Fuel Combustion (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Baking, Grill, Roasting (AREA)
  • Detergent Compositions (AREA)
EP86108120A 1985-06-13 1986-06-13 Roststab für einen Feuerungsrost einer Grossfeuerung und Feuerungsrost für diese Grossfeuerung Expired EP0206174B1 (de)

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 EP0206174A2 (de) 1986-12-30
EP0206174A3 EP0206174A3 (en) 1987-05-13
EP0206174B1 true EP0206174B1 (de) 1989-05-24

Family

ID=6273213

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86108120A Expired EP0206174B1 (de) 1985-06-13 1986-06-13 Roststab für einen Feuerungsrost einer Grossfeuerung und Feuerungsrost für diese Grossfeuerung

Country Status (8)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200471741Y1 (ko) 2013-12-17 2014-03-11 용호금속(주) 소각로용 화격자 유닛

Families Citing this family (20)

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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
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 (es) * 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
EP0919771B1 (de) * 1997-10-29 2000-11-29 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
DK1188022T3 (da) * 1999-05-21 2010-07-12 Barlow Projects Inc Forbedret forbrændingssystem til massebrændstof
US6981455B2 (en) * 2002-03-08 2006-01-03 Lefcort Malcolm D Two-stage wet waste gasifier and burner
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
FR2885403A1 (fr) * 2005-05-03 2006-11-10 Saretco Sa Barreau de grille et grille pour foyer a gradins solidaires
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
EP2487414B1 (de) * 2011-02-04 2016-11-02 Seko-Patent GmbH Roststab
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
DE102014015916A1 (de) 2014-10-29 2016-05-04 Steinmüller Babcock Environment Gmbh Roststab und Rost für eine Schubrostfeuerung
ES2856765T3 (es) * 2015-06-12 2021-09-28 Hitachi Zosen Inova Ag Bloque de rejilla para una rejilla de incineración
EP3967926B1 (de) * 2020-09-09 2024-07-03 Hitachi Zosen Inova AG Rostblock mit ansteigender nase

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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
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US1542910A (en) * 1921-11-25 1925-06-23 Core H Reid Fuel-burning grate
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FR1076466A (fr) * 1952-04-28 1954-10-27 Bayer Ag Préparation de soufre
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CH463678A (de) * 1967-06-02 1968-10-15 Johannes Josef Martin Rost für Grossfeuerungen mit luftgekühlten Roststäben
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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
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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
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200471741Y1 (ko) 2013-12-17 2014-03-11 용호금속(주) 소각로용 화격자 유닛

Also Published As

Publication number Publication date
ES296927U (es) 1988-02-16
DK164928B (da) 1992-09-07
JPS6249113A (ja) 1987-03-03
US4719900A (en) 1988-01-19
ES296927Y (es) 1988-11-16
DK276786D0 (da) 1986-06-12
DK164928C (da) 1993-01-25
DE3521266C2 (es) 1988-12-15
DK276786A (da) 1986-12-14
DE3663586D1 (en) 1989-06-29
CA1263276A (en) 1989-11-28
JPH0359329B2 (es) 1991-09-10
EP0206174A2 (de) 1986-12-30
EP0206174A3 (en) 1987-05-13
BR8602751A (pt) 1987-02-10
DE3521266A1 (de) 1986-12-18

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