EP0811804A2 - Elément de grille et grille pour incinérateur - Google Patents

Elément de grille et grille pour incinérateur

Info

Publication number
EP0811804A2
EP0811804A2 EP97108566A EP97108566A EP0811804A2 EP 0811804 A2 EP0811804 A2 EP 0811804A2 EP 97108566 A EP97108566 A EP 97108566A EP 97108566 A EP97108566 A EP 97108566A EP 0811804 A2 EP0811804 A2 EP 0811804A2
Authority
EP
European Patent Office
Prior art keywords
grate
grate element
air outlet
clearing
air
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Withdrawn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
EP97108566A
Other languages
German (de)
English (en)
Other versions
EP0811804A3 (fr
Inventor
Johannes Josef Edmund Martin
Thomas Nikolaus
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.)
TECHFORM TECHNOLOGY AG
Martin GmbH fuer Umwelt und Energietechnik
Original Assignee
Techform Engineering GmbH
Martin GmbH fuer Umwelt und Energietechnik
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 Techform Engineering GmbH, Martin GmbH fuer Umwelt und Energietechnik filed Critical Techform Engineering GmbH
Publication of EP0811804A2 publication Critical patent/EP0811804A2/fr
Publication of EP0811804A3 publication Critical patent/EP0811804A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F27D15/0206—Cooling with means to convey the charge
    • F27D15/0213—Cooling with means to convey the charge comprising a cooling grate
    • F27D15/022—Cooling with means to convey the charge comprising a cooling grate grate plates
    • 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
    • F23H7/00—Inclined or stepped grates
    • F23H7/06—Inclined or stepped grates with movable bars disposed parallel to direction of fuel feeding
    • F23H7/08—Inclined or stepped grates with movable bars disposed parallel to direction of fuel feeding reciprocating along their axes

Definitions

  • the invention relates to a grate element for a grate constructed from roof tiles which overlap one another and are movable relative to one another in the longitudinal direction relative to one another, through which the primary combustion air supplied from below can be fed into the firing material lying on the grate, with a fastening or drive end and a grate element head.
  • the invention also relates to a grate for an incinerator and a method for operating the grate.
  • Rust element Every element should be understood that is suitable for the formation of a grate covering, regardless of whether it is an air-cooled or water-cooled grate covering, regardless of the type of grate firing, insofar as it is grate elements that form roof grating-like grate steps.
  • the grate elements In the case of grate coverings in which the grate elements lie one above the other in the manner of a roof tile, the grate elements must have air outlet openings in order to be able to supply the primary combustion air from below.
  • the air outlet openings are formed either at the head end of the individual grate bars or on the flanks of adjacent grate bars. Hard slag particles or small pieces of scrap can penetrate into these air outlet openings, particularly in waste incineration plants, which is further intensified by the stoking movement of the grate steps. Melted non-ferrous metals or Bitumen-like substances penetrate into these air outlet openings, which disturbs the even air supply to the kiln.
  • the object of the invention is to provide a grate element and a grate for incineration plants in which the risk of blockage of the air passage is eliminated and easy cleaning of the air passage is made possible.
  • the prerequisites for blowing free, lighter and smaller particles that have penetrated into the air outlet are particularly favorable and, in addition, the air outlet is forcibly cleaned by the clearing projection or the clearing projections, even when it is concerned heavily wedged slag parts or molten masses. This ensures that incomplete combustion processes or overheating and to avoid damage to grate elements that lead to longer downtimes due to the replacement of such damaged grate elements.
  • each grate element Since the air outlet on the underside of each grate element is designed to be open at the bottom, the boundary wall of the air outlet formed by the grate element underneath when the firing grate is assembled is in motion with each firing stroke relative to the upper boundary wall associated with the grate element, so that this relative movement already results there is a good cleaning of the air passage from penetrated solid parts.
  • a further advantageous embodiment of the invention consists in that the clearing projection or the clearing projections are arranged in the rear area facing the fastening or drive end of the grate element.
  • the clearing projection or the spatial projections always penetrate into the air outlet when the grate elements assigned to one another move into their most extended position, that is to say when the grate element head of the driven grate element above it moves in the direction of the rear one Fastening or drive end of the underlying, fixed grate element or the grate element head of the underlying, driven grate element is moved forward relative to the overlying, fixed grate element by its grate element head.
  • a particularly advantageous embodiment of the invention is characterized in that each clearing projection is tongue-shaped and each end penetrating into the air outlet is tapered is.
  • the tapering of the end of the broaching projection or the broaching projections penetrating into the air outlet exerts a wedge effect on the clamped parts, which makes cleaning easier.
  • the cross-sectional shape of a clearing projection does not necessarily have to be adapted to the cross-sectional shape of the air outlet, in particular not if there is a predominant possible blockage of the air outlet from solid particles, since the relative movement of the one boundary wall of the air outlet already explained, in conjunction with high blow-out speeds, has a good cleaning effect is achievable.
  • the clearing projection or the clearing projections is or are adapted to the cross section of the air outlet except for a necessary play.
  • Such a configuration is particularly advantageous in connection with the configuration of the clearing projection with a tapered end explained above, since an introduction aid is created by the tapered end because a lateral movement play of a grate element cannot be completely ruled out.
  • the support and guide surface of the grate element bears a support made of wear-resistant material, then a wear-related reduction in the size of the air outlet is avoided, which extends the usability of such grate elements. Without such a wear-resistant support, the grate element would lower due to wear, thereby reducing the air outlet formed on the underside.
  • each clearing projection has a highly abrasive surface on its upper side, as a result of which the air outlet passes through as the wear and tear on the support and guide surface of the grate element increases the abrasive surface of the clearing protrusion is ground free.
  • the air outlet can be designed in different ways.
  • the air outlet can extend over the entire width of the grate element.
  • Such a configuration requires, as will be explained in more detail in connection with a grate designed according to the invention, an additional guide for each grate element, since in this configuration the grate element cannot rest in its head region on the grate element underneath.
  • the air outlet can extend over the remaining width of the grate element apart from two lateral webs serving for guidance and support. In this embodiment, the additional guidance can be dispensed with, since the webs left in the area of the flanks can be supported on the grate element located below.
  • a preferred embodiment is that the air outlet consists of a plurality of air outlet openings which are separated from one another by webs.
  • clearing projections are arranged on the top of each grate element to match the number of air outlet openings which are designed as recesses which are open at the bottom. This ensures that all air outlet openings, which in their entirety form the air outlet, can be cleaned of associated clearing projections.
  • a grate for incineration plants with grate steps lying one behind the other in the firing material conveying direction, overlapping one another like roof tiles and alternately movable and fixed, which are constructed from individual grate elements that extend over the entire grate width or from several grate elements lying side by side according to one of claims 1 to 10, is characterized by a support arrangement ( 16) on the grate element head (7) on the fixed grate element (2) and a guide arrangement for each grate element, which hold the underside of the grate element head at a distance above the grate element underneath to form an air outlet which extends over the entire width of the grate element.
  • the air outlet is thus formed by the fact that the underside of the grate element head of the grate element above it is not on the one below it arranged grate element rests, but is held by the guide arrangement at a small distance according to the desired air passage cross-section to the underlying grate element.
  • the webs provided in the outlet area can advantageously serve as a support and guide arrangement for each grate element on the grate element underneath.
  • the clearing projections are in the stroke reversal position within the air outlet and essentially close it, this will briefly generate an air jam which, when the air outlet is subsequently released, leads to an increased blowing away of the cleared parts.
  • the clearing projection or the clearing projections in the stroke reversal position can protrude slightly above the grate element head end in a further embodiment of the invention. However, it is often already sufficient if the clearing projection or the clearing projections in the stroke reversal position are flush with the grate element head.
  • a method for operating a grate according to any one of claims 11 to 15 with adjustable stroke length of the movable grate elements is characterized in that a longer cleaning stroke is set for any number of poker strokes, in which the clearing projection or the clearing projections penetrate into the air outlet.
  • the setting of a cleaning stroke can advantageously take place as a function of the air pressure prevailing in the grate area below the grate element to be regulated and / or the air speed of the primary air prevailing in this area.
  • a grate for an incineration plant is constructed from a plurality of grate elements 1 and 2 which overlap like roof tiles, of which the grate elements 1 can be moved back and forth in the direction of the arrows 12 and 13 and the grate elements 2 are arranged in a fixed manner.
  • the grate elements 1 are assigned to a drive arrangement 4, which generates the necessary stroke during the necessary stoking movement.
  • the stroke length and the stoking speed can be regulated in order to influence the combustion process on the grate in addition to various other influencing factors.
  • each grate element has a fastening or drive end 5 which is suspended in a holder 6, this holder 6 being firmly connected to the drive device 4 in the case of the driven grate elements. Furthermore, each grate element has a head end 7, a foot 8 and a back 9.
  • a plurality of recesses 10 which are open at the bottom and which serve as air outlet openings for the primary air supplied from below are formed on the grate element foot 8. These air outlet openings form the air outlet.
  • Clearance projections 11, the number of which corresponds to the number of air outlet openings 10, are preferably fixedly arranged on each grate element back 9 in the rear area facing the fastening or drive end 5.
  • the cross-sectional shape of each broaching projection 11 is up to a required range of motion
  • the cross-sectional shape of the air outlet opening 10 is adapted and the clearing projections 11 lie in the reachable stroke range of the grate element above. In this way, the clearing projections 11 penetrate into the air outlet openings 10 between two grate elements 1 and 2 assigned to one another and thereby remove the solid parts or molten masses which have penetrated there.
  • the clearing projections can be tapered at their ends in order to enable easier insertion into the air outlet openings 10 and to be able to exert a certain wedge effect on the parts clamped there.
  • the cleaning stroke is to be understood as the largest stroke that can be set by the drive arrangement 4. Depending on the degree of impending blockage of the air outlet formed from the air outlet openings 10, cleaning strokes can be set accordingly frequently.
  • the corresponding control measures are carried out as a function of the air pressure prevailing in the area below the grate element to be controlled and / or the air speed prevailing in this area.
  • the air outlet openings 10 of the movable grate element 1, on the other hand, are penetrated by the clearing projections 11 of the underlying, fixed grate element 2 at the end of the cleaning stroke directed towards the rear, the direction of movement of which is indicated by the arrow 13, due to this backward movement on the grate element head 7 of the moving grate element 1 is also no shear load, which leads to the fact that solid parts are pushed into the air outlet opening 10 is avoided by the clearing projections 11.
  • the clearing projections 11 can, however, also be arranged at other locations, provided that it is only ensured that they penetrate into the air outlet openings 10 during the stroke movement that can be achieved and can clear them.
  • each web 3 can be provided with a wear-resistant support 14.
  • each broaching projection 11 can have an abrasive surface 15 on its upper side, so that with each cleaning stroke the upper edge of the air outlet openings 10 is ground in accordance with the wear on the webs 3, so that the air outlet openings are reground for a certain operating time 10 the grate elements can still be operated in spite of wear, since the reduction in the size of the air outlet openings that usually occurs due to wear on the grate element foot or the webs 3 is canceled out again by this grinding effect.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Incineration Of Waste (AREA)
  • Detergent Compositions (AREA)
EP97108566A 1996-06-04 1997-05-28 Elément de grille et grille pour incinérateur Withdrawn EP0811804A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19622423 1996-06-04
DE19622423A DE19622423C1 (de) 1996-06-04 1996-06-04 Rostelement und Rost für Verbrennungsanlagen sowie Verfahren zum Betrieb des Rostes

Publications (2)

Publication Number Publication Date
EP0811804A2 true EP0811804A2 (fr) 1997-12-10
EP0811804A3 EP0811804A3 (fr) 1999-05-12

Family

ID=7796126

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97108566A Withdrawn EP0811804A3 (fr) 1996-06-04 1997-05-28 Elément de grille et grille pour incinérateur

Country Status (11)

Country Link
EP (1) EP0811804A3 (fr)
JP (1) JPH1054535A (fr)
BR (1) BR9703441A (fr)
CA (1) CA2206725A1 (fr)
CZ (1) CZ292189B6 (fr)
DE (1) DE19622423C1 (fr)
NO (1) NO972546L (fr)
PL (1) PL320321A1 (fr)
RU (1) RU2127851C1 (fr)
SG (1) SG47227A1 (fr)
TW (1) TW338785B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2003396A2 (fr) 2005-09-06 2008-12-17 Ernst Schenkel Elément de grille
CN105927968A (zh) * 2016-06-08 2016-09-07 青岛德施普工程技术有限公司 锅炉燃烧用的布风床料系统
CN105953246A (zh) * 2016-06-08 2016-09-21 青岛德施普工程技术有限公司 高温炉渣干式冷却及输送的布风床料系统
CN106090899A (zh) * 2016-06-08 2016-11-09 青岛德施普工程技术有限公司 流化床锅炉风水双床冷渣机

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100226989B1 (ko) * 1996-11-27 1999-10-15 장병주 스토커식 소각로의 화격자 마모 방지 시스템
FR2894012B1 (fr) * 2005-11-28 2008-01-18 Cometal France Sarl Barreau pour grille de four d'incineration
KR100830199B1 (ko) 2007-05-08 2008-05-16 주식회사 진화메탈 소각로의 클링커 부착 방지용 라이너 및 그 설치구조
KR101054561B1 (ko) 2009-09-16 2011-08-04 이수현 클링커 부착 방지용 화격자 구조
JP5871541B2 (ja) * 2011-09-29 2016-03-01 荏原環境プラント株式会社 ストーカ式焼却炉の火格子の取り付け構造及びストーカ式焼却炉
KR101307252B1 (ko) * 2013-04-09 2013-09-11 (주)태종 폐기물 소각장치의 화상면 구성방법
PL3798515T3 (pl) * 2015-06-12 2024-02-19 Hitachi Zosen Inova Ag Blok rusztowy do rusztu do spalania
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
CN108278623A (zh) * 2017-01-06 2018-07-13 贵州中烟工业有限责任公司 一种炉排片、炉排以及锅炉
CN114526486B (zh) * 2022-02-18 2022-12-02 江苏大鸿环保设备有限公司 一种增加生活垃圾进料量的炉排装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4105330C1 (fr) 1991-02-18 1992-08-06 Noell - K + K Abfalltechnik Gmbh, 4040 Neuss, De
DE4205502C1 (en) 1992-02-22 1993-02-18 Evt Energie- Und Verfahrenstechnik Gmbh, 7000 Stuttgart, De Moving grate on transverse girders, for rubbish incinerator - has grate rod rear protruding over vertical shank of angled grate bar foot, forming gap between shank and downwards flange

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3926125C1 (en) * 1989-08-08 1990-08-30 Evt Energie- Und Verfahrenstechnik Gmbh, 7000 Stuttgart, De Incinerator air cooled grate with transverse supports - has several grate bars bolted into groups, clad by wear-resistant plates on top and bottom
DE9312738U1 (de) * 1993-08-25 1993-11-11 Jünger & Gräter GmbH Feuerfestbau, 68723 Schwetzingen Rostelement für Vorschubroste, insbesondere für Müllverbrennungsanlagen
DE59506717D1 (de) * 1994-02-07 1999-10-07 Seghers Better Technology Grou Verfahren zum verbrennen von feststoffen auf einem schub-verbrennungsrost-system
DE19607007C2 (de) * 1996-02-24 2002-05-29 Krc Umwelttechnik Gmbh Rost mit Reinigungseinrichtungen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4105330C1 (fr) 1991-02-18 1992-08-06 Noell - K + K Abfalltechnik Gmbh, 4040 Neuss, De
DE4205502C1 (en) 1992-02-22 1993-02-18 Evt Energie- Und Verfahrenstechnik Gmbh, 7000 Stuttgart, De Moving grate on transverse girders, for rubbish incinerator - has grate rod rear protruding over vertical shank of angled grate bar foot, forming gap between shank and downwards flange

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2003396A2 (fr) 2005-09-06 2008-12-17 Ernst Schenkel Elément de grille
EP2003396A3 (fr) * 2005-09-06 2012-11-07 Ernst Schenkel Elément de grille
CN105927968A (zh) * 2016-06-08 2016-09-07 青岛德施普工程技术有限公司 锅炉燃烧用的布风床料系统
CN105953246A (zh) * 2016-06-08 2016-09-21 青岛德施普工程技术有限公司 高温炉渣干式冷却及输送的布风床料系统
CN106090899A (zh) * 2016-06-08 2016-11-09 青岛德施普工程技术有限公司 流化床锅炉风水双床冷渣机
CN106090899B (zh) * 2016-06-08 2018-03-20 青岛德施普工程技术有限公司 流化床锅炉风水双床冷渣机

Also Published As

Publication number Publication date
CZ168797A3 (en) 1997-12-17
TW338785B (en) 1998-08-21
BR9703441A (pt) 1998-09-01
SG47227A1 (en) 1998-03-20
RU2127851C1 (ru) 1999-03-20
CZ292189B6 (cs) 2003-08-13
EP0811804A3 (fr) 1999-05-12
DE19622423C1 (de) 1997-07-10
CA2206725A1 (fr) 1997-12-04
JPH1054535A (ja) 1998-02-24
NO972546L (no) 1997-12-05
PL320321A1 (en) 1997-12-08
NO972546D0 (no) 1997-06-04

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