EP3308078B1 - Rostblock für einen verbrennungsrost - Google Patents

Rostblock für einen verbrennungsrost Download PDF

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Publication number
EP3308078B1
EP3308078B1 EP15729437.2A EP15729437A EP3308078B1 EP 3308078 B1 EP3308078 B1 EP 3308078B1 EP 15729437 A EP15729437 A EP 15729437A EP 3308078 B1 EP3308078 B1 EP 3308078B1
Authority
EP
European Patent Office
Prior art keywords
grate
block
plane
grate block
pushing
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.)
Active
Application number
EP15729437.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3308078A1 (de
Inventor
Werner Brennwald
Helen GABLINGER
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.)
Hitachi Zosen Innova AG
Original Assignee
Hitachi Zosen Innova AG
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 Hitachi Zosen Innova AG filed Critical Hitachi Zosen Innova AG
Priority to EP20207797.0A priority Critical patent/EP3798515B1/de
Priority to PL15729437T priority patent/PL3308078T3/pl
Publication of EP3308078A1 publication Critical patent/EP3308078A1/de
Application granted granted Critical
Publication of EP3308078B1 publication Critical patent/EP3308078B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • F23H3/04—Grates with hollow bars externally cooled, e.g. with water, steam or air
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23H—GRATES; CLEANING OR RAKING GRATES
    • F23H2700/00—Grates characterised by special features or applications
    • F23H2700/009—Grates specially adapted for incinerators

Definitions

  • the invention relates to a grate block for a combustion grate according to the preamble of claim 1.
  • the invention further relates to a combustion grate comprising at least one such grate block.
  • the invention also relates to the use of said incineration grate for incinerating waste and a waste incineration plant comprising such an incineration grate.
  • Incineration grates for the large-scale incineration of waste have been known to the person skilled in the art for a long time.
  • Such combustion grates can be in the form of thrust combustion grates, which include moving parts that are suitable for carrying out stokes.
  • the material to be fired is conveyed from an inlet-side end of the combustion grate to its outlet-side end and is burned during this.
  • appropriate air supply lines are provided, which lead through the combustion grate and through which the so-called primary air is introduced.
  • a frequently used combustion grate is the so-called step grate.
  • This comprises grate blocks arranged next to one another and each forming a row of grate blocks.
  • the rows of grate blocks are arranged one above the other in a step-like manner, with the front end of a grate block, viewed in the pushing direction, in the case of so-called advancing grids, resting on a support surface of the grate block adjacent in the transport direction corresponding pushing movement is moved on this support surface.
  • the grate blocks are arranged rotated by 180 ° in relation to the feed grates, viewed in the direction of transport of the material to be fired.
  • the front end of the grate block In the case of push-back grates, the front end of the grate block, viewed in the pushing direction, therefore rests on a support surface of the previous grate block.
  • the direction of pushing of the moving grating In contrast to moving grates, the direction of pushing of the moving grating is opposite to the direction of transport resulting from the inclination of the moving grate.
  • a combustion grate designed as a moving grate and a grate block for such a combustion grate is approximately in the EP 1 191 282 which refers to a water-cooled grate block.
  • Another combustion grate of the type described is also approximately in the EP 2 184 540 which refers to an air-cooled grate block.
  • the in EP 1 191 282 grate block described a block body designed as a cast part, which has a top wall forming a support surface for the waste to be treated and a front wall.
  • a foot is formed which is intended to rest slidably on the support surface of an adjacent grate block in the pushing direction, while openings for the introduction of the primary air are arranged in the upper area of the front wall.
  • document EP0921354 discloses the preamble of claim 1.
  • the material being fired over the grate blocks are generally exposed to a relatively high level of wear.
  • the abrasion is particularly high in the area of the foremost end of the support surface, where the material to be fired from the support surface of the grate block over a corresponding discharge edge is thrown onto the supporting surface of the following grate block. This can in particular also lead to erosion of the air outlet openings arranged below the edge, which can negatively affect the controlled air supply to the combustion bed lying on the combustion grate.
  • the object to be solved according to the invention is to provide a grate block mentioned at the beginning which has a long service life and in which in particular the erosion of the wall section containing the air supply openings is minimized.
  • the present invention thus relates to a grate block for an incineration grate, in which successive grate blocks are arranged one above the other in a staircase-like manner and are designed in such a way that the material to be burned is shifted and conveyed during the combustion by means of pushing movements performed relative to one another.
  • combustion grates are also referred to as step grates.
  • the grate block according to the invention comprises a block body designed as a cast part.
  • the block body is designed essentially in the form of an elongated cuboid with a longitudinal axis L.
  • the block body comprises an upper wall which forms a support surface that runs at least partially parallel to the longitudinal axis L of the block body, along which the material to be fired is to be conveyed and the front end of which, viewed in the pushing direction S, forms an edge over which the support surface enters one of a front wall formed thrust surface drops.
  • the front wall has at least one air supply opening, viewed in longitudinal section, at right angles or at an angle to the thrust surface, for supplying air to the combustion grate, and in its lowest area is designed in the form of a foot which is intended to rest on the support surface of an adjacent grate block in the thrust direction .
  • the foot thus rests on the grate block or its support surface following in the direction of transport of the material to be fired.
  • the grate block according to the invention is intended for a return grate; in this case the foot rests on the grate block or its supporting surface that is preceding in the direction of transport of the material to be fired.
  • At least the front support edge of the thrust surface is arranged in a plane E which runs essentially at right angles to the longitudinal axis L.
  • a plane arranged in the lowermost area of the front wall, the lower end of which is formed by the front support edge is arranged in plane E, whereas it is also conceivable that only the line described by the front support edge is in plane E. is arranged.
  • the edge is now set forward with respect to the plane E along the longitudinal axis L and viewed in the thrust direction S. This ensures that at least part of the thrust surface is exposed to reduced erosion by the material to be fired and that in particular the air can more easily escape through the air supply opening (s).
  • a minimization of the abrasive forces acting on the thrust surface and thus of the abrasion-related wear of the grate block as a whole can ultimately be obtained according to the invention.
  • the at least one air supply opening is also arranged in the grate block according to the present invention below the edge over which the bearing surface drops into the pushing surface.
  • the upper wall and the front wall are designed to be thickened in the region in which they meet, the wall thickening being arched when viewed in longitudinal section, i.e. is in the form of a bead.
  • the edge is offset along the longitudinal axis L and viewed in the direction of thrust S with respect to the plane E by at least 3 mm, preferably by at least 5 mm, and most preferably by at least 10 mm.
  • the edge viewed along the longitudinal axis L and in the direction of thrust S, is advanced with respect to the plane E by at most 100 mm, preferably by at most 50 mm, and most preferably by at most 30 mm.
  • the distance at which the edge is offset in advance with respect to the plane E is therefore preferably in the range of 3 mm to 100 mm, particularly preferably in the range from 5 mm to 50 mm, and most preferably in the range from 10 mm to 30 mm.
  • a long service life and, in particular, a reduction in the erosion of the wall section containing the air supply openings can thus be ensured without the basic shape of established grate blocks such as that in accordance with the invention EP 1 191 282 would have to be deviated greatly.
  • the at least one air supply opening runs at an angle ⁇ to the region of the thrust surface immediately adjacent to the respective air supply opening, where ⁇ in a range from 90 ° to 135 °, preferably from 95 ° to 125 °, especially preferably from 100 ° to 120 °, and most preferably from 105 ° to 115 °.
  • ⁇ in a range from 90 ° to 135 °, preferably from 95 ° to 125 °, especially preferably from 100 ° to 120 °, and most preferably from 105 ° to 115 °.
  • the grate block is laterally closed by a side wall extending in the longitudinal direction.
  • at least one side wall has a wear marking which is one of the plane of the Describes the support surface and / or contour spaced from the plane of the thrust surface.
  • the wear marking allows the degree of wear to be determined very easily by eye. This ensures, on the one hand, that a worn grate block is recognized in good time, which contributes to a safer operation of the combustion grate. On the other hand, it is made possible that the grate block is actually used until the end of its life; a replacement of a grate block that is still functional in and of itself is thus prevented.
  • the contour of the wear marking is preferably spaced from the plane of the support surface and / or from the plane of the thrust surface by 15 mm to 30 mm, most preferably by 20 mm to 25 mm. This distance corresponds to the maximum permissible abrasion of the grate block up to which it is still fully functional.
  • the contour of the wear marking runs parallel to the plane of the support surface and / or the thrust surface at least in some areas. This allows a particularly simple check of the degree of abrasion at the individual points of the grate block.
  • the contour of the wear marking runs parallel at least to that area of the support surface and the push surface where they meet. This is because the grate block is exposed to particularly high levels of wear and tear in that area, and checking the degree of abrasion is therefore of particular relevance in this area.
  • the wear marking is designed in the form of a notch or a recess.
  • the notch or the recess can be designed to be continuous or interrupted.
  • the additional material which is required for the preferred wall thickening in the area of the discharge edge can be at least partially compensated or even overcompensated by the material savings made possible by the notch or the recess. Since the notch or the recess is formed in the side wall and thus in a relatively weakly stressed area of the grate block, this saving in material is not at the expense of the stability or the service life of the grate block.
  • this further wear marking can be provided with information on the grate block, which should be at least temporarily visible.
  • the further wear marking can be provided with the indication of origin or the "stamp" of the grate block manufacturer.
  • the grate block has generally reached the end of its service life when the outer contour of the grate block at least partially coincides with the contour of the wear mark or when the contour of the wear mark is no longer visible.
  • the present invention also relates to a combustion grate comprising at least one grate block according to claim 1.
  • the present invention relates to the use of an above-described incineration grate for the incineration of waste and a waste incineration plant comprising such an incineration grate.
  • the grate block 10 has in common with previously known grate blocks that it comprises a block body 12 designed as a cast part, which is essentially designed in the form of an elongated cuboid 121 with a longitudinal axis L.
  • the block body 12 comprises an upper wall 14, which forms a support surface 16 running parallel to the longitudinal axis L, along which the material to be fired is to be conveyed and the front end of which, viewed in the pushing direction S, forms an edge 19, over which the support surface 16 into one of a front Wall 20 formed thrust surface 22 drops.
  • the bearing surface has a first bearing surface area 16a and a second bearing surface area 16b, which both run parallel to the longitudinal axis L, but the first bearing surface area 16a is offset upward from the second bearing surface area 16b and is connected to it via a beveled transition 17 is.
  • the area of the support surface located immediately in front of the edge is designed in the form of a bevel 21.
  • the block body 12 On the side opposite the front wall 20, the block body 12 has a rear wall 24 which is equipped with at least one hook 26 with which the grate block 10 can be suspended in a block holding tube.
  • a central web 29 is also arranged on the underside of the grate block 10 facing away from the support surface.
  • the grate block 10 is laterally closed by a side wall 28a, 28b extending in the longitudinal direction.
  • the grate block 10 rests on a grate block following in the thrust direction S.
  • the lowermost area 32 of the front wall 20 is designed in the form of a foot 34 which is intended to rest on the support surface of a grate block adjacent in the direction of thrust S.
  • the lowermost area including the front support edge of the thrust surface formed by it is arranged in a plane E which runs essentially at right angles to the longitudinal axis L.
  • the wall thickening 40 is arched when viewed in longitudinal section.
  • the edge 19 formed by the wall thickening 40 is thus set forward along the longitudinal axis L and viewed in the thrust direction S with respect to the plane E, the distance D between the edge 19 and the plane E being approximately 25 mm in the embodiment shown.
  • the air supply openings are set back along the longitudinal axis L and viewed in the pushing direction S with respect to the edge, in the specifically shown embodiment by a distance d of approximately 8 mm.
  • the air supply openings 38 viewed in longitudinal section, run at an angle ⁇ of approximately 90 ° to the thrust surface 22 in their area directly adjacent to the respective air supply opening.
  • the side wall 28a has a wear marking 42 in the form of a recess 421, which describes a contour 44 spaced from the plane of the support surface 16, in particular the second support surface area 16b and the bevel 21, and from the plane of the thrust surface 22.
  • the wear marking 42 or the contour 44 runs essentially parallel to the second contact surface area 16b and to the bevel 21 of the contact surface 16 and to the thrust surface 22.
  • the contour 44 therefore runs in a first area 44a parallel to the plane of the second contact area area 16b, in a second Area 44b parallel to bevel 21, and in a third area 44c parallel to thrust surface 22.
  • the wear marking is spaced from the plane E of the thrust surface 22 by a distance ⁇ of approximately 20 mm.
  • the grate blocks 10 are moved relative to one another by means of the block holding tubes.
  • the block holding tubes are either attached to stationary consoles or to consoles which are arranged in a movable grate carriage. It is driven by hydraulic cylinders, which move the grate trolleys back and forth over rollers on corresponding running surfaces.
  • the edge 19 is set forward with respect to the plane E as described, it can be achieved that at least part of the thrust surface 22 is exposed to reduced erosion by the material to be fired and, in particular, that the air can escape more easily through the air supply openings 38.
  • the wall thickening 40 in that area of the grate block 10 which is exposed to particularly strong wear and tear can tolerate significantly greater abrasion, which ultimately results in an increased service life of the grate block.
  • the degree of abrasion can be determined by means of the wear mark in the Fig. 7 and 8th
  • the embodiment shown can easily be determined by eye: If the abrasion has reached such a level that the outer contour of the grate block 10 at least partially coincides with the contour 44 of the wear marking 42 in the side view or that the contour 44 of the wear marking 42 is no longer visible at all the grate block 10 is worn out and needs to be replaced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)
EP15729437.2A 2015-06-12 2015-06-12 Rostblock für einen verbrennungsrost Active EP3308078B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20207797.0A EP3798515B1 (de) 2015-06-12 2015-06-12 Rostblock für einen verbrennungsrost
PL15729437T PL3308078T3 (pl) 2015-06-12 2015-06-12 Blok rusztowy dla rusztu do spalania

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2015/063146 WO2016198119A1 (de) 2015-06-12 2015-06-12 Rostblock für einen verbrennungsrost

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP20207797.0A Division EP3798515B1 (de) 2015-06-12 2015-06-12 Rostblock für einen verbrennungsrost

Publications (2)

Publication Number Publication Date
EP3308078A1 EP3308078A1 (de) 2018-04-18
EP3308078B1 true EP3308078B1 (de) 2020-12-02

Family

ID=53404541

Family Applications (2)

Application Number Title Priority Date Filing Date
EP15729437.2A Active EP3308078B1 (de) 2015-06-12 2015-06-12 Rostblock für einen verbrennungsrost
EP20207797.0A Active EP3798515B1 (de) 2015-06-12 2015-06-12 Rostblock für einen verbrennungsrost

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP20207797.0A Active EP3798515B1 (de) 2015-06-12 2015-06-12 Rostblock für einen verbrennungsrost

Country Status (13)

Country Link
US (1) US10760787B2 (ko)
EP (2) EP3308078B1 (ko)
JP (1) JP6734302B2 (ko)
KR (1) KR102320060B1 (ko)
CN (1) CN107850302B (ko)
AU (1) AU2015398478B2 (ko)
CA (1) CA2989062C (ko)
ES (2) ES2856765T3 (ko)
MX (1) MX2017015819A (ko)
MY (1) MY189420A (ko)
PL (2) PL3798515T3 (ko)
RU (1) RU2673020C1 (ko)
WO (1) WO2016198119A1 (ko)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019108342A1 (de) * 2019-03-29 2020-10-01 EURODUR GmbH Rostplatte für einen Schubrostofen
CN114450520A (zh) 2019-07-05 2022-05-06 日立造船爱诺瓦公司 用于焚烧炉排的炉排块
WO2021004664A1 (de) 2019-07-05 2021-01-14 Hitachi Zosen Inova Ag Rostblock für einen verbrennungsrost

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10267250A (ja) * 1997-03-21 1998-10-09 Hitachi Zosen Corp ごみ焼却炉の燃焼火格子

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US3014439A (en) * 1960-07-11 1961-12-26 Earland R Mitchell Hollow stoker grate
AT307604B (de) * 1970-03-28 1973-05-25 Peters Ag Claudius Einstückige Rostplatte
FR2247134A5 (ko) * 1973-10-09 1975-05-02 Stein Industrie
GB1521376A (en) * 1975-07-04 1978-08-16 Peters Ag Claudius Grate plate
JPS5418076U (ko) * 1977-07-07 1979-02-05
DE2833255A1 (de) * 1978-07-28 1980-02-07 Pauli Gmbh Waermetechnik Luftgekuehlter roststab
CH669447A5 (ko) * 1982-05-13 1989-03-15 Von Roll Ag
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
DE4105330C1 (ko) * 1991-02-18 1992-08-06 Noell - K + K Abfalltechnik Gmbh, 4040 Neuss, De
ES2097172T5 (es) * 1991-09-09 2000-10-16 Abrasion Eng Co Ltd Elemento de parrilla para la construccion de un emparrillado.
DE19613507C1 (de) * 1996-04-04 1997-08-21 Evt Energie & Verfahrenstech Rostplatte
DE19622423C1 (de) * 1996-06-04 1997-07-10 Martin Umwelt & Energietech Rostelement und Rost für Verbrennungsanlagen sowie Verfahren zum Betrieb des Rostes
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
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EP1191282B1 (de) 2000-09-22 2003-04-16 Von Roll Umwelttechnik AG Gekühlter Rostblock
US6964237B2 (en) 2003-06-30 2005-11-15 Mark P. Hepp Grate block for a refuse incineration grate
DE102004040048A1 (de) * 2004-08-18 2006-02-23 Ikn Gmbh Rostplattenanordnung für Stufenroste
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Patent Citations (1)

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JPH10267250A (ja) * 1997-03-21 1998-10-09 Hitachi Zosen Corp ごみ焼却炉の燃焼火格子

Also Published As

Publication number Publication date
AU2015398478A1 (en) 2018-01-18
CA2989062A1 (en) 2016-12-15
CN107850302B (zh) 2020-09-04
MY189420A (en) 2022-02-10
EP3798515B1 (de) 2023-08-23
PL3308078T3 (pl) 2021-06-14
KR102320060B1 (ko) 2021-11-01
JP2018517113A (ja) 2018-06-28
EP3308078A1 (de) 2018-04-18
JP6734302B2 (ja) 2020-08-05
CN107850302A (zh) 2018-03-27
WO2016198119A1 (de) 2016-12-15
KR20180017146A (ko) 2018-02-20
EP3798515A1 (de) 2021-03-31
US10760787B2 (en) 2020-09-01
PL3798515T3 (pl) 2024-02-19
ES2856765T3 (es) 2021-09-28
AU2015398478B2 (en) 2021-07-01
EP3798515C0 (de) 2023-08-23
US20180347811A1 (en) 2018-12-06
MX2017015819A (es) 2018-08-01
CA2989062C (en) 2022-08-02
RU2673020C1 (ru) 2018-11-21
ES2964850T3 (es) 2024-04-09

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