EP4048951A2 - Schubrost für einen verbrennungsofen - Google Patents
Schubrost für einen verbrennungsofenInfo
- Publication number
- EP4048951A2 EP4048951A2 EP20808009.3A EP20808009A EP4048951A2 EP 4048951 A2 EP4048951 A2 EP 4048951A2 EP 20808009 A EP20808009 A EP 20808009A EP 4048951 A2 EP4048951 A2 EP 4048951A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- grate
- bars
- rows
- driven
- grate bars
- 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
Links
Classifications
-
- 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
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/002—Incineration of waste; Incinerator constructions; Details, accessories or control therefor characterised by their grates
-
- 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
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2203/00—Furnace arrangements
- F23G2203/101—Furnace arrangements with stepped or inclined grate
Definitions
- the invention relates to a sliding grate for an incinerator, in particular a special waste incineration plant, according to the preamble of claim 1.
- Push grids are usually made up of individual rows of grate bars, which are arranged one behind the other in the direction of flow of the fuel and lie above one another like roof tiles.
- the grate bars of a row of grate bars are mounted on a grate bar support.
- At every second grate bar support drives attack that initiate a drive movement in the relevant driven rows of grate bars.
- the driven rows of grate bars are set in motion in relation to the non-driven, fixed rows of grate bars.
- the movement of the driven rows of grate bars causes, on the one hand, a transport of the fuel applied to a sliding grate surface of the sliding grate through the furnace and, on the other hand, the stoking of the fuel layer.
- the sliding grate surface is formed by the surfaces of the individual grate bars.
- a circular segment-shaped first drive movement is initiated in the grate bar carrier by the drive via torsion shafts and torsion levers, so that a correspondingly based grate bar movement of the grate bars mounted on the driven grate bar carriers results, for example in US 6,332,410 B1.
- a straight first drive movement via linkage is also possible, resulting in a straight grate bar movement of the grate bars mounted on the driven grate bar supports.
- DE 30 07 678 C2 also describes a sliding grate with a torsion shaft, the shaft bearings of which are adjustable in height so that the rows of grate bars can be driven again in a straight drive direction.
- the disadvantage here is that the torsion shafts or rods together with the associated machine elements, e.g. bearings or guides, are inevitably located in the area of a wind below the incineration plant, where they are more susceptible to failure. If the intention is to implement more complex forms of movement of the rows of grate bars as well as the grate bars via the grate bar supports, the additional mechanical drive elements required for this in the downwind ensure an increased susceptibility to malfunctions, which makes the combustion process less reliable.
- the object of the invention is therefore to provide a sliding grate with which even more complex forms of movement of the rows of grate bars can be represented with low susceptibility to failure and thus high reliability.
- the surfaces of grate bars of at least some grate bar rows of the generic thrust grate for an incinerator, in particular a garbage incineration plant have a non-planar surface contour, so that the grate with its second ends on the non- planar surface support contour, a second drive movement can be initiated by the relative movement between the grate bars of driven and non-driven grate bar rows.
- a complex grate bar movement of the grate bars of the push grate can thereby be brought about, this complex grate bar movement being achieved by the surface shape of the grate bars which are already present. This means that no adjustments to the conventional propulsion equipment are necessary in the downwind, so that the susceptibility to malfunctions does not increase any further.
- the drive means conventionally ensure that at least some of the grate bar rows of the sliding grate, preferably every second grate bar row, are driven, whereby a first drive movement can be introduced into the grate bars via the drive means, so that a relative movement between the grate bars of the driven Rows of grate bars and the grate bars of non-driven, ie not driven by the drive means, grate bar rows results.
- This first drive movement which is introduced into the grate bars via the first ends, is superimposed according to the invention on the second drive movement, which is introduced via the second ends.
- a first grate bar movement of the grate bars of the driven rows of grate bars is composed of the first drive movement induced via the first ends and the second drive movement induced via the second ends, and / or that
- the non-planar surface contours of the grate bars of the at least some grate bar rows have a curved profile running in the direction of flow.
- a second drive movement can advantageously be generated according to a predefinable curve profile when the second end of the respective grate bar slides along the curve profile due to the force of gravity due to the relative movement between the grate bars.
- this causes a grate bar movement with a directional component in the direction of flow as well as perpendicular to the direction of flow, i.e. upwards, in order to enable the fuel layer to be transported and stoked according to a complex sequence of movements.
- the non-driven rows of grate bars have a curved profile running in the direction of flow and the other grate bars are designed, for example, planar. This means that it is possible to flexibly determine which rows of grate bars should carry out a complex sequence of movements.
- the second drive movement is only introduced into the non-driven rows of grate bars and the driven rows of grate bars are only actively driven by the drive means by the first drive movement.
- the driven rows of grate bars need to be provided with a curve profile. It is preferably also provided that the curve profile has at least one curve area with a specific defined radius.
- the surface of the grate bar is curved with a certain radius, along which the respective second end of the grate bar supported thereon can slide continuously.
- adjacent curve areas have different radii.
- the at least one curve area is curved concavely or convexly with the respective radius and / or adjacent curve areas of a curve profile have different curvatures, for example alternating convex and concave curvatures.
- the first drive movement runs in the shape of a segment of a circle or in a straight line.
- a drive means can be selected in the downwind, via which a first drive movement is applied to the first in a simple manner and without great susceptibility to malfunctions End of the grate bar can be transferred.
- the drive means can have torsion levers attached to a torsion shaft that connect a linear actuator, for example a hydraulic cylinder, to the grate bar supports being driven to produce a circular segment-shaped first drive movement around a second axis of rotation defined by the torsion shaft when the linear actuator is actuated.
- a straight-line movement can be transmitted from the linear actuator to the first end via a linkage, so that this is also moved in a straight line.
- a complex form of movement of the grate bars or grate bars can advantageously be achieved with the drives of the state of the art which cause a straight or circular segment-shaped movement of the grate bar supports, in that the grate bars themselves - via the second drive movement - for influencing the straight-line or circular segment-shaped first drive movement to a more complex movement.
- the shape of the grate bars according to the invention does not cause any greater susceptibility to failure than in the prior art, so that no additional, potentially failure-prone drive mechanisms are required.
- FIG. 1 shows a section of a sliding grate in a retracted drive position in a sectional view
- FIG. 2 shows the detail of the sliding grate in the retracted drive position according to FIG. 1 in a perspective view
- 3 shows a detail of the sliding grate in an extended drive position in a sectional view
- FIG. 4 shows a section of the sliding grate in the extended drive position according to FIG. 3 in a perspective view
- 5a, 5b show exemplary curve profiles of a grate bar.
- Fig. 1 is a sectional view and in Fig. 2 in a perspective view of a thrust grate 100 for an incinerator 101, in particular a special waste incinerator, shown on which a fuel layer 1, for example from incinerated waste, applied during a combustion process is.
- the sliding grate 100 has a plurality of grate bar rows 2a, 2b arranged along a flow direction F, which are each formed from grate bars 3a, 3b lying next to one another in the transverse direction Q (perpendicular to the flow direction F).
- the grate bars 3a, 3b of a grate bar row 2a, 2b are mounted on a grate bar carrier 5a, 5b via a first end 4a, 4b so that each grate bar 3a, 3b can rotate about a first axis of rotation D1 defined by the respective grate bar carrier 5a, 5b .
- the grate bars 3a, 3b of the individual grate bar rows 2a, 2b still lie on top of each other like roof tiles, with a second end 6a, 6b of the respective grate bar 3a, 3b on a surface 7a, 7b of the adjacent grate bar 3a, 3b as seen in the direction of flow F due to gravity supports.
- the surfaces 7a, 7b of the individual grate bars 3a, 3b thus form a continuous sliding grate surface 8 on which the fuel layer 1 is transported, stoked and burned.
- every second grate bar support 5 a (driven grate bar support) interacts with a drive means 9 which is arranged in a lower wind 200 of the incineration furnace 101. That one- intermediate grate bar supports 5b (non-driven grate bar supports) are not driven. About the drive means 9, a first Antriebbe movement A1 (see. Fig. 3 and Fig. 4) into the driven grate bar carrier 5a and thus also into the first end 4a of the grate bar 3a mounted thereon are introduced.
- the first drive movement A1 can be in the form of a segment of a circle (dotted in FIGS. 3 and 4), the drive means 9 having at least two torsion levers 11a, 11b attached to a torsion shaft 10, which have a linear actuator 12, for example a hydraulic cylinder connect the driven grate bar supports 5a.
- a linear actuator 12 for example a hydraulic cylinder connect the driven grate bar supports 5a.
- drive means 9 are also possible, which cause a straight first drive movement A1 (dash-dotted lines in Fig. 3 and Fig. 4) and thus also a straight movement of the driven grate bar supports 5a and the first end 4a of the grate bars 3a mounted thereon.
- the first drive movement A1 in the form of a segment of a circle or straight already results in a first grate bar movement Ba of the grate bars 3a mounted on the driven grate bar supports 5a, which has a directional component both in the flow direction F and vertically upwards (to the flow direction F and to the transverse direction Q) , whereby the fuel layer 1 transported along the flow direction F and can also be stoked at the same time.
- the surfaces 7a, 7b of the individual grate bars 3a, 3b are designed in such a way that a second drive movement A2 can be introduced into the respective grate bar 3a, 3b via the second end 6a, 6b of the respective grate bar 3a, 3b (see Figs.
- this second drive movement A2 can be introduced into the grate bars 3a, which are stored on the driven grate bar supports 5a, as well as into the grate bars 3b, which are supported on the non-driven grate bar supports 5b, as described below:
- the surfaces 7a, 7b of the respective grate bars 3a, 3b have, in section, a non-straight surface contour 13a, 13b in the manner of a curve profile K.
- the second ends 6a, 6b of the respective grate bar 3a, 3b, which are supported thereon, are moved upwards or downwards depending on the position on the curve profile K, which results in the second drive movement A2.
- the second drive movement A2 introduced into the second end 6a, 6b of the respective grate bar 3a, 3b is therefore particularly dependent on the position of the second end 6a, 6b on the curve profile K of the grate bar 3a, 3b adjacent in the flow direction F.
- the result for the grate bars 3a, which are mounted on a driven grate bar carrier 5a is a first Roststabbewe movement Ba, which is a combination of the first drive movement A1 and the second drive movement A2.
- a first Roststabbewe movement Ba which is a combination of the first drive movement A1 and the second drive movement A2.
- the grate bars 3b, which are mounted on a non-driven grate bar carrier 5b there is a second grate rod movement Bb, which benefits only from the second drive movement A2.
- the second drive movement A2 is determined by the curve profile K of the respective surface contours 13a, 13b, this curve profile K itself not being fixed, since the surfaces 7a, 7b of the grate bars 3a, 3b are likewise due to the respective grate bar movement Ba, Bb move.
- the first and / or the second drive movement A complex grate bar movement Ba, Bb of the respective grate bars 3a, 3b is thus effected.
- exemplary curve profiles K are shown, where there is a first curve area K1 with a first radius R1 towards the first end 4a, 4b of the respective grate bars 3a, 3b and one towards the second end 6a, 6b second curve area K2 with a second radius R2.
- the first radius R1 is smaller than the second radius R2 and, on the other hand, the first curve area K1 is concave and the second curve area K2 is convexly curved.
- grate bars 3a which are mounted on driven grate bar supports 5a, have a different curve profile K than grate bars 3b, which are mounted on non-driven grate bar supports 5b.
- a complex grate bar movement Ba, Bb can therefore be achieved from a combination of the two drive movements A1, A2 via the first end 4a, 4b and the second end 6a, 6b of a grate bar 3a, 3b without having to change the drive means 9 or further extensive drive means are to be positioned in the lower wind 200, so that the susceptibility to failure is not increased by this solution and the reliability is maintained.
- K1, K2, K3, K4 ... first, second, third, fourth, ... curve area Q transverse direction R1, R2, R3, R4 ... first, second, third, fourth, ... radius
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Incineration Of Waste (AREA)
- Pivots And Pivotal Connections (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019128536.4A DE102019128536B4 (de) | 2019-10-22 | 2019-10-22 | Schubrost für einen Verbrennungsofen |
| PCT/DE2020/100897 WO2021078330A2 (de) | 2019-10-22 | 2020-10-16 | Schubrost für einen verbrennungsofen |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP4048951A2 true EP4048951A2 (de) | 2022-08-31 |
| EP4048951C0 EP4048951C0 (de) | 2025-06-11 |
| EP4048951B1 EP4048951B1 (de) | 2025-06-11 |
Family
ID=73455489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20808009.3A Active EP4048951B1 (de) | 2019-10-22 | 2020-10-16 | Schubrost für einen verbrennungsofen |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4048951B1 (de) |
| JP (1) | JP6986612B2 (de) |
| DE (1) | DE102019128536B4 (de) |
| WO (1) | WO2021078330A2 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES3010084T3 (en) * | 2020-09-09 | 2025-04-01 | Kanadevia Inova Ag | Grate block with rising lug |
| JP7836198B2 (ja) * | 2022-03-16 | 2026-03-26 | 株式会社フジタ | 燃焼装置及びそれを備えた焼却炉 |
| DE102022107219A1 (de) | 2022-03-28 | 2023-09-28 | Hitachi Zosen Inova Steinmüller GmbH | Verfahren zum Betreiben eines Schubrosts und Schubrost |
| DE102022110710B4 (de) * | 2022-05-02 | 2024-03-07 | Hitachi Zosen Inova Steinmüller GmbH | Feuerrost und Verfahren zur Überwachung des Feuerrosts |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04320713A (ja) * | 1991-04-19 | 1992-11-11 | Sanki Eng Co Ltd | ごみ焼却炉の火格子装置 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD6681A3 (de) | 1949-09-27 | 1956-02-06 | ||
| CH637198A5 (de) * | 1979-03-14 | 1983-07-15 | Widmer & Ernst Ag | Feuerungsrost fuer verbrennungsoefen. |
| JPS593220Y2 (ja) * | 1980-07-29 | 1984-01-28 | 泰正 須川 | 都市ごみ焼却炉用連続スト−カ− |
| EP0981021A1 (de) * | 1998-08-19 | 2000-02-23 | Asea Brown Boveri AG | Rost für Verbrennungsanlagen |
| DE202017006429U1 (de) * | 2017-12-14 | 2019-03-15 | Wvt Breiding Gmbh | Vorschubrost-Roststein mit konturierter Lauffläche, Roststein-Anordnung und Vorschubrost |
-
2019
- 2019-10-22 DE DE102019128536.4A patent/DE102019128536B4/de active Active
-
2020
- 2020-10-16 WO PCT/DE2020/100897 patent/WO2021078330A2/de not_active Ceased
- 2020-10-16 EP EP20808009.3A patent/EP4048951B1/de active Active
- 2020-10-19 JP JP2020175206A patent/JP6986612B2/ja active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04320713A (ja) * | 1991-04-19 | 1992-11-11 | Sanki Eng Co Ltd | ごみ焼却炉の火格子装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6986612B2 (ja) | 2021-12-22 |
| DE102019128536B4 (de) | 2021-09-23 |
| DE102019128536A1 (de) | 2021-04-22 |
| WO2021078330A2 (de) | 2021-04-29 |
| JP2021067453A (ja) | 2021-04-30 |
| EP4048951C0 (de) | 2025-06-11 |
| EP4048951B1 (de) | 2025-06-11 |
| WO2021078330A3 (de) | 2021-06-24 |
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