EP3308078A1 - Bloc de grille pour une grille de combustion - Google Patents

Bloc de grille pour une grille de combustion

Info

Publication number
EP3308078A1
EP3308078A1 EP15729437.2A EP15729437A EP3308078A1 EP 3308078 A1 EP3308078 A1 EP 3308078A1 EP 15729437 A EP15729437 A EP 15729437A EP 3308078 A1 EP3308078 A1 EP 3308078A1
Authority
EP
European Patent Office
Prior art keywords
grate
thrust
plane
block
grate block
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
EP15729437.2A
Other languages
German (de)
English (en)
Other versions
EP3308078B1 (fr
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.)
Kanadevia Inova 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 PL15729437T priority Critical patent/PL3308078T3/pl
Priority to EP20207797.0A priority patent/EP3798515B1/fr
Publication of EP3308078A1 publication Critical patent/EP3308078A1/fr
Application granted granted Critical
Publication of EP3308078B1 publication Critical patent/EP3308078B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 further relates to the use of said combustion grate for the combustion of waste and to a waste incineration plant comprising such a combustion grate.
  • Combustion grates for the large-scale combustion of waste have long been known to the skilled person. Such combustion grates can be approximately in the form of
  • Schubverbrennungsrosten be present, which include moving parts that are suitable to perform Schürhübe.
  • the firing material is conveyed from an inlet-side end of the combustion grate to its outlet-side end and burned during this time.
  • the combustion grate leading air supplies are provided, through which the so-called primary air is introduced.
  • a frequently used combustion grate is the so-called stair grate.
  • This comprises grate blocks arranged next to one another and forming a grate block row in each case.
  • the grate block rows are arranged in a staircase one above the other, wherein in so-called feed grates, the front end of a grate block viewed in the thrust direction rests on a support surface of the grate block adjacent in the transport direction and at
  • a combustion grate designed as a feed grate and a grate block for such a combustion grate are described, for example, in EP 1 191 282, which relates to a water-cooled grate block.
  • Another combustion grate of the type described is also described, for example, in EP 2 184 540, which relates to an air-cooled grate block.
  • the grate block described in EP 1 191 282 comprises a block body formed as a casting which has a top wall forming a support surface for the waste to be treated and a front wall.
  • a foot adapted to slidably rest on the support surface of a grate block adjacent in the thrust direction, while apertures for introducing the primary air are disposed in the upper portion of the front wall.
  • the abrasion is particularly high especially in the region of the foremost end of the support surface, where the kiln from the support surface of the grate block on a
  • A21370EP / 06.10.2015 corresponding discharge edge is dropped onto the support surface of the subsequent grate block. This can in particular also lead to erosion of the air outlet openings arranged below the edge, which can adversely affect the controlled air supply to the fuel bed lying on the combustion grate.
  • the object to be solved according to the invention thus lies in providing a grate block 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 object to be solved according to the invention is to provide a grate block which is mentioned at the outset, which allows a simple check of the degree of abrasion.
  • the present invention thus relates to a grate block for a combustion grate, in which successive grate blocks are arranged in a staircase one above the other and are designed to re-disperse and promote the kiln during combustion by means of relatively executed thrust movements.
  • Such combustion grates are referred to as stair grids as mentioned above.
  • the grate block according to the invention comprises a block body formed as a casting.
  • the block body is formed substantially in the form of an elongated cuboid with a longitudinal axis L.
  • the block body comprises an upper wall which forms a support surface extending at least partially parallel to the longitudinal axis L of the block body, along which the firing material is to be conveyed and whose foremost end, seen in the direction of thrust S, forms an edge over which the bearing surface projects into one of a front wall formed pushing surface drops.
  • the front wall has at least one viewed in longitudinal section at right angles or obliquely to the thrust surface extending Heilzubowff ung for supplying air to the combustion grate and is formed in its lowermost region in the form of a foot, which is intended to be on the support surface of a adjacent in the thrust direction grate block to rest.
  • A21370EP / 06.10.2015 is determined, the foot is thus on the next in the transport direction of the kiln grate block or its support surface. It is also conceivable that the grate block according to the invention is intended for a returnable grate; In this case, the foot rests on the grate block or its bearing surface preceding in the transport direction of the firing material.
  • At least the front bearing edge of the thrust surface is arranged in a plane E extending substantially at right angles to the longitudinal axis L. It is conceivable in this regard that a plane arranged in the lowermost region of the front wall, whose lower end is formed by the front support edge, is arranged in the plane E, whereas it is also conceivable that only the line described by the front support edge in the plane E is arranged.
  • the edge along the longitudinal axis L and in the direction of thrust S is now set in relation to the plane E.
  • Air supply opening (s) can escape.
  • Air supply opening (s) can escape.
  • 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 arranged below the edge, over which the support surface drops into the thrust surface.
  • A21370EP / 06.10.2015 According to a particularly preferred embodiment of the invention, however, it is set back along the longitudinal axis L and viewed in the thrust direction S with respect to the edge.
  • the region of the thrust surface in which the at least one air supply opening is arranged is arranged in a plane which is set back along the longitudinal axis L and in the direction of thrust S with respect to the edge.
  • the upper wall and the front wall are formed thickened in the area in which they meet, wherein the wall thickening is formed arched viewed in longitudinal section, i. in the form of a bead.
  • the edge along the longitudinal axis L and viewed in the thrust direction S with respect to the plane E is set by at least 3 mm, preferably by at least 5 mm, and most preferably by at least 10 mm.
  • the edge along the longitudinal axis L and viewed in the thrust direction S with respect to the plane E by at most 100 mm, preferably by at most 50 mm, and most preferably advanced by at most 30 mm.
  • the distance with which the edge is pre-offset with respect to the plane E preferably in the range of 3 mm
  • A21370EP / 06.10.2015 to 100 mm, more preferably in the range of 5 mm to 50 mm, and most preferably in the range of 10 mm to 30 mm.
  • the at least one air supply opening extends at an angle ⁇ to the region of the thrust surface immediately adjacent to the respective air supply opening, particularly preferably in a range from 90 ° to 135 °, preferably from 95 ° to 125 ° from 100 ° to 120 °, and most preferably from 105 ° to 115 °.
  • the area of the air supply opening relevant for the determination of the angle is the area immediately before the exit of the respective air supply opening from the front wall. If the region of the thrust surface adjoining directly to the respective air supply opening is arched, then the tangent resulting in this region is relevant for the determination of the angle.
  • the grate block is closed laterally by a respective longitudinally extending side wall.
  • the wear marker allows the degree of abrasion to be easily determined by the eye.
  • a worn grate block is detected in time, which contributes to a safer operation of the combustion grate.
  • the grate block is actually used until the end of its lifetime; a replacement of a still functioning block of rust is thus prevented.
  • the contour of the wear mark is 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 allowable abrasion of the grate block, up to which it is still fully functional.
  • the contour of the wear marking extends at least in regions parallel to the plane of the support surface and / or the thrust surface. 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 extends at least to that region of the support surface and the thrust surface parallel, where these meet. This is because the grate block is exposed to a particularly high level of wear in precisely that area, and a check of the degree of abrasion is thus of particular relevance in this area.
  • the Verschleissmark ist is formed in the form of a notch or a recess.
  • the notch or the recess can be configured pulled or interrupted. According to this
  • the additional material which is required for the preferred wall thickening in the region of the discharge edge at least partially compensated or even overcompensated by the savings made possible by the notch or the return material saving. Since the notch or the recess is formed in the side wall and thus in a relatively weakly stressed region of the grate block, this material saving is not at the expense of the stability or the service life of the grate block.
  • the present invention in addition to the grate block described above, moreover relates to a grate block according to independent claim 12.
  • the present invention thus also relates to a grate block for a combustion grate of the type described above, comprising a cast block formed as a block body comprising a top wall which forms a parallel to a longitudinal axis L of the block body extending support surface along which the kiln are conveyed should and their considered in the thrust direction S foremost end forms an edge for the kiln, over which the support surface drops into a thrust surface formed by a front wall.
  • the grate block is closed on at least one side by a longitudinally extending side wall. According to the invention, it is characterized in that at least one side wall has a wear marking which describes a contour spaced from the plane of the support surface and / or from the plane of the thrust surface.
  • the grate block has usually reached the end of its life, when the outer contour of the grate block coincides at least partially with the contour of the Verschleissmark ist or if the contour of the Verschleissmark ist is no longer visible.
  • the grate block according to claim 12 may additionally comprise in particular the features of claim 1, i. in particular one along the longitudinal axis L and in
  • the present invention additionally relates to a combustion grate comprising at least one of the grate blocks described above.
  • the present invention relates to the use of a combustion grate for the combustion of waste described above and a
  • Waste incineration plant comprising such a combustion grate.
  • FIG. 1 shows a grate block according to the prior art in side view
  • Fig. 2 shows the grate block of the state shown in FIG
  • Fig. 3 shows the grate block of the shown in Figs. 1 and 2
  • FIG. 4 shows a grate block according to the first aspect of the present invention in side view
  • FIG. 5 shows the grate block according to FIG. 4 in a plan view from above;
  • A21370EP / 06.10.2015 6 shows the grate block according to FIGS. 4 and 5 in a longitudinal section through the sectional plane AA;
  • FIG. 7 shows a grate block according to the second aspect of the present invention in a side view; and FIG. 8 shows the grate block according to FIG. 7 in top view from above.
  • the grate block 10 according to the invention with previously known grate blocks has in common that it comprises a block body 12 formed as a casting which essentially has the shape of an elongated cuboid 121 Longitudinal axis L is formed.
  • the block body 12 comprises an upper wall 14, which forms a parallel to the longitudinal axis L extending support surface 16, along which the kiln to be conveyed and viewed in the thrust direction S foremost end forms an edge 19, via which the support surface 16 in one of a front Wall 20 formed thrust surface 22 drops.
  • the support surface has a first support surface region 16a and a second support surface region 16b, both of which are parallel to the longitudinal axis L, but the first support surface region 16a is offset upward relative to the second support surface region 16b and connected thereto via a bevelled transition 17 is.
  • the area of the support surface located immediately before the edge is formed in the form of a chamfer 21.
  • the block body 12 On the opposite side of 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 holder tube. On the side facing away from the support surface bottom of the grate block 10 also has a central web 29 is arranged.
  • the grate block 10 is completed by a longitudinally extending side wall 28a, 28b.
  • the grate block 10 rests on a grate block following in the direction of thrust S.
  • the lowermost region 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 region, including the front bearing edge of the thrust surface formed by the latter, is arranged in a plane E extending essentially at right angles to the longitudinal axis L.
  • an upper, i. the edge 19 facing portion 36 of the front wall 20 formed two through the wall leading air supply openings 38 for supplying air to the combustion grate, wherein in the figure, only one of these air supply openings is shown.
  • A21370EP / 06.10.2015 is the wall thickening 40 viewed curved in longitudinal section formed.
  • the edge 19 formed by the wall thickening 40 is thus pre-offset with respect to the plane E along the longitudinal axis L and viewed in the direction of thrust S, wherein in the illustrated embodiment the distance D between the edge 19 and the plane E is approximately 25 mm.
  • the air supply openings along the longitudinal axis L and viewed in the thrust direction S are set back relative to the edge, in the specific embodiment shown by a distance d of about 8 mm.
  • the air supply openings 38 extend at an angle of approximately 90 ° to the thrust surface 22 in their region immediately adjacent to the respective air supply opening.
  • the side wall 28a has a wear mark 42 in the form of a recess 421, one from the plane of the support surface 16, in particular the second one
  • contour 44 extends in a first region 44a parallel to the plane of the second contact surface region 16b, in a second Region 44b parallel to the chamfer 21, and in a third region 44c parallel to the thrust surface 22nd
  • the grate blocks 10 are moved relative to each other by means of the block holder tubes.
  • the block holder tubes are attached either to stationary brackets or to brackets which are arranged in a movable grate carriage.
  • the drive takes place by means of hydraulic cylinders which move the grate carriages back and forth on rollers on corresponding running surfaces.
  • the foot 34 of a first grate block 10 is pushed back and forth over the support surface 16 of the respective subsequent grate block 10, wherein the kiln is conveyed over the support surface 16, before it over the edge 19 on the support surface 16 of the subsequent grate block 10 is dropped.
  • the edge 19 is pre-offset as described with respect to the plane E, it can be achieved that at least a portion of the thrust surface 22 is exposed to reduced erosion by the kiln and that in particular the air can escape more easily through the air supply openings 38.
  • the wall thickening 40 in that region of the grate block 10, which is exposed to a particularly strong wear a much stronger abrasion can be tolerated, thus ultimately an increased life of the grate block is achieved.
  • A21370EP / 06.10.2015 The degree of abrasion can be determined very easily by eye by means of the wear marking of the embodiment shown in FIGS. 7 and 8: If the abrasion has reached a level such that the outer contour of the grate block 10 with the contour 44 of the wear marking 42 is at least partially in the side view coincides or that the contour 44 of the Verschleissmark ist 42 is no longer visible, the grate block 10 is worn and must 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)
  • Baking, Grill, Roasting (AREA)

Abstract

L'invention concerne un bloc de grille (10) pour une grille de combustion, dans laquelle des blocs de grille se suivant les uns les autres sont disposés les uns au-dessus des autres à la manière d'escaliers et sont configurés de manière à modifier la distribution du combustible et à le refouler au cours de la combustion au moyen de mouvements de poussée exécutés les uns par rapport aux autres. Le bloc de grille (10) comprend un corps de bloc (12) réalisé sous la forme d'une pièce de coulée, lequel comprend une paroi supérieure (14), qui forme une surface de réception (16) s'étendant au moins en partie de manière parallèle par rapport à un axe longitudinal L du corps de bloc, le long de laquelle le combustible est censé être refoulé et dont l'extrémité la plus avant, vue dans la direction de poussée S, forme un bord (19), par-dessus lequel la surface de réception (16) tombe dans une surface de poussée (22) formée par une paroi avant (20). La paroi avant (20) comporte au moins une ouverture d'amenée d'air (38) s'étendant, vue en coupe longitudinale, de manière perpendiculaire ou de manière oblique par rapport à la surface de poussée (22), servant à amener de l'air sur la grille de combustion. Elle est réalisée, dans sa zone (32) la plus basse, sous la forme d'un pied (34), laquelle se destine à reposer sur la surface de réception d'un bloc de grille adjacent dans la direction de poussée S. Au moins l'arête de réception (23) avant de la surface de poussée (22) est disposée dans un plan E s'étendant sensiblement de manière perpendiculaire par rapport à l'axe longitudinal L. Le bloc de grille est caractérisé en ce que le bord (19) est, vu le long de l'axe longitudinal L et dans la direction de poussée S, décalé vers l'avant par rapport au plan E.
EP15729437.2A 2015-06-12 2015-06-12 Bloc de grille pour une grille de combustion Active EP3308078B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL15729437T PL3308078T3 (pl) 2015-06-12 2015-06-12 Blok rusztowy dla rusztu do spalania
EP20207797.0A EP3798515B1 (fr) 2015-06-12 2015-06-12 Bloc de grillage pour une grille de combustion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2015/063146 WO2016198119A1 (fr) 2015-06-12 2015-06-12 Bloc de grille pour une grille de combustion

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP20207797.0A Division EP3798515B1 (fr) 2015-06-12 2015-06-12 Bloc de grillage pour une grille de combustion

Publications (2)

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

Family

ID=53404541

Family Applications (2)

Application Number Title Priority Date Filing Date
EP20207797.0A Active EP3798515B1 (fr) 2015-06-12 2015-06-12 Bloc de grillage pour une grille de combustion
EP15729437.2A Active EP3308078B1 (fr) 2015-06-12 2015-06-12 Bloc de grille pour une grille de combustion

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP20207797.0A Active EP3798515B1 (fr) 2015-06-12 2015-06-12 Bloc de grillage pour une grille de combustion

Country Status (13)

Country Link
US (1) US10760787B2 (fr)
EP (2) EP3798515B1 (fr)
JP (1) JP6734302B2 (fr)
KR (1) KR102320060B1 (fr)
CN (1) CN107850302B (fr)
AU (1) AU2015398478B2 (fr)
CA (1) CA2989062C (fr)
ES (2) ES2856765T3 (fr)
MX (1) MX390829B (fr)
MY (1) MY189420A (fr)
PL (2) PL3798515T3 (fr)
RU (1) RU2673020C1 (fr)
WO (1) WO2016198119A1 (fr)

Families Citing this family (5)

* 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
KR20220030240A (ko) * 2019-07-05 2022-03-10 히타치 조센 이노바 아게 연소 화격자를 위한 화격자 블록
CA3147854A1 (fr) * 2019-07-05 2021-01-14 Hitachi Zosen Inova Ag Bloc de grille pour une grille de combustion
EP4027091A1 (fr) * 2021-01-08 2022-07-13 Babcock & Wilcox Vølund A/S Élément de grille à plaques pour une grille mobile d'un four
KR102728777B1 (ko) * 2022-04-20 2024-11-13 박준형 스토커 소각 및 연소용 공랭 화격자

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Also Published As

Publication number Publication date
JP2018517113A (ja) 2018-06-28
EP3798515C0 (fr) 2023-08-23
RU2673020C1 (ru) 2018-11-21
MX390829B (es) 2025-03-21
ES2964850T3 (es) 2024-04-09
MX2017015819A (es) 2018-08-01
JP6734302B2 (ja) 2020-08-05
CN107850302B (zh) 2020-09-04
PL3798515T3 (pl) 2024-02-19
WO2016198119A1 (fr) 2016-12-15
AU2015398478A1 (en) 2018-01-18
CA2989062A1 (fr) 2016-12-15
CA2989062C (fr) 2022-08-02
ES2856765T3 (es) 2021-09-28
KR20180017146A (ko) 2018-02-20
EP3798515A1 (fr) 2021-03-31
AU2015398478B2 (en) 2021-07-01
US20180347811A1 (en) 2018-12-06
MY189420A (en) 2022-02-10
KR102320060B1 (ko) 2021-11-01
EP3798515B1 (fr) 2023-08-23
EP3308078B1 (fr) 2020-12-02
PL3308078T3 (pl) 2021-06-14
CN107850302A (zh) 2018-03-27
US10760787B2 (en) 2020-09-01

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