WO2024088955A1 - Rostbahnbegrenzungselement für einen verbrennungsrost - Google Patents
Rostbahnbegrenzungselement für einen verbrennungsrost Download PDFInfo
- Publication number
- WO2024088955A1 WO2024088955A1 PCT/EP2023/079457 EP2023079457W WO2024088955A1 WO 2024088955 A1 WO2024088955 A1 WO 2024088955A1 EP 2023079457 W EP2023079457 W EP 2023079457W WO 2024088955 A1 WO2024088955 A1 WO 2024088955A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- grate
- channel
- cover
- designed
- combustion
- 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.)
- Ceased
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
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H17/00—Details of grates
- F23H17/08—Bearers; Frames; Spacers; Supports
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H17/00—Details of grates
- F23H17/08—Bearers; Frames; Spacers; Supports
- F23H17/10—Dead plates; Imperforate fuel supports
Definitions
- the present invention relates to a grate path limiting element for a combustion grate for incinerating waste and to a combustion grate comprising at least one such grate path limiting element.
- combustion grates for the large-scale incineration of waste have been known to experts for a long time.
- Such combustion grates can be in the form of pusher combustion grates, for example, which have movable parts to carry out stoking strokes.
- the fuel is conveyed in the transport direction from an inlet end of the combustion grate to an outlet end and is burned in the process.
- appropriate air feeds are provided through the combustion grate, through which the air - also known as primary air - is introduced.
- a frequently used combustion grate is the so-called stepped grate.
- This comprises grate blocks arranged next to one another, each forming a row of grate blocks.
- the rows of grate blocks are arranged one above the other in a stepped manner, whereby in the case of so-called pusher grates, the front end of a grate block, viewed in the push direction, rests on a support surface of the adjacent (underlying) grate block in the transport direction and is moved on this support surface with the corresponding push movement.
- the grate blocks Due to the high temperatures during combustion and in the combustion chamber, the grate blocks are also exposed to very high thermal stress. The thermal stress promotes erosion through abrasion and chemical reactions taking place on the contact surface, which further damage the contact surface. All of this ultimately leads to a shortening of the service life of the grate block.
- the grate bars are normally cooled with a coolant or cooling fluid from below, i.e. on the side of the combustion grate opposite the combustion.
- a coolant or cooling fluid from below, i.e. on the side of the combustion grate opposite the combustion.
- Water or air is usually used as a coolant, which is why grate blocks are often referred to as air- or water-cooled.
- the individual grate tracks are arranged in such a way that they can expand at least on one long side. This expansion can lead to problems if it causes parts to become deformed and/or gaps to form through which uncontrolled primary air can enter the combustion chamber. This primary air promotes uncontrolled combustion, which further increases the thermal load.
- Grate track separation also called center beam.
- DE 69105120 T2 discloses a connecting support which is intended to guarantee thermal expansion compensation and tightness of a space between two laterally attached grate strips.
- WO 2018/149516 A1 discloses a grate track separation element which is designed as a one-piece cast part. Due to the design as a one-piece element, the grate track separation element can only partially accommodate the lateral expansion of the grate tracks, which can cause the gaps mentioned above and, as a result, unintentional primary air to enter the combustion chamber.
- the invention relates to a grate path limiting element for a combustion grate for incinerating waste.
- the grate path limiting element comprises a channel element and a channel cover for covering the channel element.
- the channel cover comprises at least one cover element and one end element with a locking device.
- the end element comprises a support surface facing away from the channel element and a first engagement element directed towards the cover element.
- the cover element comprises a support surface facing away from the channel element, a retaining element directed towards the channel element, a second engagement element directed towards the end element and designed to receive the first engagement element, and a recess directed towards the end element for receiving the locking device of the end element.
- the locking device is designed such that it releasably locks the end element in the channel element.
- engaging element is understood to mean an element which engages with another element or which is engaged by another element. Accordingly, both a nose and a recess for this nose are referred to as engaging elements.
- the grate track limiting element according to the invention has the advantage over the solutions from the prior art that the expansion of the grate tracks is compensated by compressing the channel element. This leads to better tightness of the entire construction and accordingly to less uncontrolled inflow of primary air into the combustion chamber.
- a construction in the sense of WO 2018/149516 Al with a fixed cover does not lead to the same improved tightness, since the expansion of the grate tracks is limited due to the lower elasticity of the «one-piece» channel element can be compensated less effectively.
- the channel cover comprises a second cover element, which is preferably designed identically to the first cover element.
- the cover elements When attaching the duct cover, it is preferable to find a middle ground between the number of individual parts to be assembled and the weight of the individual parts to be assembled.
- either the cover elements are relatively heavy or the effort required to secure the end elements is complex.
- two fitters are required to place the cover element together on the duct element.
- the effort required to secure the end elements should not be underestimated. It is therefore preferable to fix a sequence of two cover elements, preferably of the same design, with one end element. This makes the individual parts lighter and therefore easier to assemble, and the number of end elements is reduced, which makes the effort required to secure them less.
- the first engagement element is designed as a projection and the second engagement element as a recess.
- the engagement elements can be designed both as a projection and as a recess for receiving the projection.
- the cover element comprises a recess-shaped
- the engagement element and the cover element are engagement elements designed as projections (also known as noses) which are designed to fit the recess of the cover element.
- the end element comprises two engagement elements designed as projections which are located opposite one another and which each engage in the recesses of the cover elements.
- This design provides improved fixation of the channel cover in the channel element, which increases the tightness of the grate track limitation element.
- the channel element comprises an opening directed towards the channel cover for receiving the retaining element of the cover element.
- the opening is designed as a groove with incisions and is narrower than the width of the retaining element. The incisions are wider than the width of the retaining element of the cover element.
- a groove with incisions is understood to mean an elongated opening parallel to the longitudinal axis of the channel element, which has local widenings (incisions) that are wider than the groove.
- the cover elements and the end elements can be inserted into the channel element at the location of the cuts and then pushed to the final installation location.
- the channel element comprises a cooling fluid channel with a cooling fluid inlet opening and a cooling fluid outlet opening.
- the opening of the channel element directed towards the channel cover extends into the fluid channel.
- the grate path delimitation element comprises a sealing element attached to the side of the wall of the channel element. This sealing element further increases the tightness of the grate and reduces the uncontrolled inflow of primary air to the combustion chamber.
- the feed grates usually comprise movable and non-movable grate blocks, which are arranged in rows of movable and non-movable grate blocks. While the non-movable grate block rows compress the grate path limiting element due to thermal expansion, this is not the case to the same extent with the movable grate block rows, since these must still remain movable. It is therefore preferred that a sealing element is attached to the grate path limiting element above the contact point of the grate blocks, and particularly preferably this is attached only above the movable grate blocks.
- the support surface of the cover element facing away from the channel element and the support surface of the end element facing away from the channel element are gable roof-shaped or mansard gable roof-shaped, preferably with rounded edges.
- gable roof-shaped is understood to mean a shape that resembles a gable roof. That is, a shape in which a roof surface slopes down on both sides of a gable oriented in the longitudinal direction.
- mansard gable roof-shaped is understood to mean a special form of gable roof in which the roof surface sloping down from the gable does not extend as a flat plane, but is divided into several levels that have different inclinations.
- support surface of the cover element and the end element facing away from the channel element are a semicircular shape, an elliptical shape or a flat plane.
- the above-mentioned preferred embodiments of the support surface have proven to be particularly efficient in the transport and distribution of fuel on the combustion grate, so that no fuel remains on the grate path delimitation element.
- the locking device is designed as a clamp, wherein the clamp is particularly preferably arranged between the support surface of the closure element and the channel element.
- This preferred design of the locking device allows for easy installation and removal, while at the same time ensuring high stability of the fixation, so that the end element can be securely fixed, but is also easy to assemble and disassemble.
- the arrangement of the clamp below the support surface protects the clamp from direct contact with the firing material, so that it is not blocked or stuck by the firing material and is therefore easy to assemble and disassemble.
- the locking device is designed as a bolt with a locking pin, as a screw with or without a nut, or as an expansion element. All embodiments allow the locking device to be released with little effort in order to remove the end element. Even for the embodiments in which the locking device is designed as a bolt with a locking pin, as a screw with or without a nut, or as an expansion element, it is preferred that the locking device is arranged below the support surface in order to protect it from direct contact with the material to be fired.
- the support surface of the cover element facing away from the channel element and the support surface of the end element facing away from the channel element are designed in the shape of a pent roof.
- pent roof-shaped is understood to mean a shape that resembles a pent roof.
- one side of the roof slopes down from the The gable slopes at an angle of between 10 - 80°, while the other opposite side of the roof slopes vertically or almost vertically.
- This embodiment is preferred when the grate path limiting element extends along the wall of the combustion chamber.
- a pent roof-shaped support surface has the advantage that fuel does not remain on the sides, preferably not on the side walls of the combustion chamber, which could lead to uncontrolled combustion.
- the locking device preferably comprises a plate and a bolt that fixes the plate in the end element. This enables easy installation and removal in the case of a grate path limiting element that is only accessible from one side, for example in the case of a grate path limiting element that extends along the wall of the combustion chamber.
- the invention further relates to a combustion grate comprising at least two grate tracks and a grate track limiting element arranged between the grate tracks as described above.
- the combustion grate according to the invention has, as described above, the advantage that the inflow of controlled combustion air into the combustion chamber is prevented.
- the invention further relates to a combustion grate comprising at least one grate track and a grate track delimiting element as described above arranged between the grate track and a side wall of a combustion chamber of an incineration plant.
- the combustion grate according to the invention has the advantage that the inflow of controlled combustion air into the combustion chamber is prevented and no combustible material remains along the side walls.
- the invention further relates to an incineration plant for the thermal treatment of waste comprising one or more combustion grates ( s ) as described above .
- the incineration plant according to the invention has the advantage that the inflow of controlled combustion air into the combustion chamber is prevented, whereby the incineration of waste can take place more efficiently and the plant requires less maintenance.
- Fig . 1 is a perspective view of a
- Fig. 2 is a perspective view of a
- Fig . 3 is a perspective view of the
- FIG. 4 is an exploded view of the grate track limiting element of Figure 3;
- Fig. 5 is a perspective view of an embodiment of a duct cover
- Fig. 6 is a bottom view of an embodiment of a
- Fig. 7 is a bottom view of an embodiment of a
- Fig . 8 is a perspective view of a
- Fig. 9 is a longitudinal section through the combustion grate of Figure 8.
- Fig. 10 is a perspective view of the
- Fig. 11 is an exploded view of the grate track limiting element of Figure 10;
- Fig. 12 is a detailed view of a sealing element attached to the side of the wall of the channel element
- Combustion plant comprises a side wall 3 a Combustion grate 5 comprising an air-cooled grate track 7 and a water-cooled grate track 9.
- the combustion grate 5 further comprises two grate track delimitation elements 11, 13.
- Figure 2 shows the combustion grate 5 comprising the air-cooled grate track 7, the water-cooled grate track 9 and the grate track limiting element 11 arranged between the two grate tracks.
- Figure 3 shows the grate track limitation element 11 comprising a channel element 15, a channel cover 17 and a sealing element 19.
- Figure 4 shows the grate track delimitation element 11 with raised channel cover 17.
- the channel cover 17 consists of two cover elements 21, 23 and a closing element 25.
- the channel element 15 comprises a groove 27 extending in the longitudinal direction of the channel element 15, which has incisions 29.
- FIG. 5 shows a detailed view of the channel cover 17 comprising the cover elements 21, 23 and the closing element 25.
- the cover elements 21, 23 comprise retaining elements 31, 32, which are located on the side of the cover elements 21, 23 facing the channel element 15.
- the cover elements 21, 23 On the side facing away from the channel element 15, the cover elements 21, 23 have support surfaces 33, 35 on which the firing material rests.
- the support surfaces 33, 35 are designed in the shape of a mansard gable roof with rounded edges.
- the cover elements 21, 23 have engagement elements 37, 39, which are designed as recesses here.
- the engagement elements 37, 39 are oriented in the direction of the closing element 25.
- the cover elements 21, 23 each have a recess 41, 43 for engaging elements 37, 39 (the recess 43 is not visible in the cover element 23 in this figure).
- the recess 41 serves to accommodate a locking device (as will be described later).
- Figure 5 also shows a closing element 25 with a support surface 45 and two engaging elements 47, 49, which are designed as projections.
- the closing element 25 also comprises a locking device 51, which is designed as a clamp.
- Figure 6 shows a bottom view of the cover elements 21, 23 comprising the retaining elements 31, 32, the recesses 41, 43 and the engagement element 39 (the engagement element 37 is not visible).
- Figure 7 shows a bottom view of the end element 25 with the engagement element 47 and the locking device 49.
- Figure 8 shows a detailed view of the combustion plant comprising the side wall 3, the combustion grate 5 with the air-cooled grate track 7 and the grate track limiting element 13 arranged between the side wall 3 and the grate track 7.
- Figure 9 shows a longitudinal section through the combustion plant of Figure 8 with the side wall 3, the combustion grate 5, the air-cooled grate track 7 and the grate track limiting element 13 arranged between the side wall 3 and the grate track 7.
- Figure 10 shows a detailed view of the grate track limiting element 13 comprising the channel element 15 with the sealing element 19 attached to the side and the duct cover 17 comprising the cover elements 21, 23 and the end element 25.
- Figure 11 shows a detailed view of the channel cover 17 with the cover elements 21, 23 and the end element 25.
- the support surfaces 33, 35 of the cover elements 21, 23 are designed in the shape of a pent roof with rounded edges.
- the cover elements 21, 23 have the retaining elements 31, 32 on the side facing the channel element 15.
- the cover elements 21, 23 comprise the engagement elements 37, 39 on the side facing the end element 25, which are designed as recesses here.
- the cover elements 21, 23 further comprise the recesses 41, 43 (the recess 41 is not visible) for receiving the locking device 49.
- Figure 11 further shows the end element 25 with the locking device 49, which is designed here as a plate with bolts.
- Figure 12 shows a detailed view of the transition from the grate path limiting element 13 to the combustion grate 5.
- the channel element 15 comprises sealing elements 19 attached to the side of the channel element 15.
- the sealing elements 19 are attached above a row of movable grate blocks 51, which move back and forth on sliding surfaces 53 of immovable grate blocks 55.
- the sealing element 19 closes a gap (not shown) that is created when the combustion grate 5 contracts and through which primary air could enter the combustion chamber in an uncontrolled manner.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Incineration Of Waste (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP23793392.4A EP4609120A1 (de) | 2022-10-26 | 2023-10-23 | Rostbahnbegrenzungselement für einen verbrennungsrost |
| JP2025524234A JP2025534833A (ja) | 2022-10-26 | 2023-10-23 | 燃焼火格子用の火格子トラック境界要素 |
| CN202380075230.1A CN120112754A (zh) | 2022-10-26 | 2023-10-23 | 用于燃烧炉排的炉排轨道分隔元件 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22203864.8 | 2022-10-26 | ||
| EP22203864.8A EP4361500A1 (de) | 2022-10-26 | 2022-10-26 | Rostbahnbegrenzungselement für einen verbrennungsrost |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024088955A1 true WO2024088955A1 (de) | 2024-05-02 |
Family
ID=84358580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2023/079457 Ceased WO2024088955A1 (de) | 2022-10-26 | 2023-10-23 | Rostbahnbegrenzungselement für einen verbrennungsrost |
Country Status (4)
| Country | Link |
|---|---|
| EP (2) | EP4361500A1 (de) |
| JP (1) | JP2025534833A (de) |
| CN (1) | CN120112754A (de) |
| WO (1) | WO2024088955A1 (de) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0004072A2 (de) * | 1978-03-07 | 1979-09-19 | Josef Martin Feuerungsbau GmbH | Rostbelag, insbesondere für Grossfeuerungen |
| DE69105120T2 (de) | 1990-04-23 | 1995-05-11 | Tiru Traite Ind Residus Urbain | Balken, der eine Dehnungsfuge zwischen nebeneinanderliegenden Zonen eines Rostes bildet, dessen Stäbe abwechselnd fest und beweglich sind. |
| WO2018149516A1 (de) | 2017-02-17 | 2018-08-23 | Mitsubishi Hitachi Power Systems Europe Gmbh | Vorschubrost mit rostbahntrennungselementen |
| KR20200013957A (ko) * | 2018-07-31 | 2020-02-10 | (주)이에스 | 고형연료 소각로 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0678812B2 (ja) * | 1991-06-26 | 1994-10-05 | ティー.アイ.アール.ユー.−トレトマン アンデュストリエル デ レジデュ ユルバン | 密封梁 |
| EP0650017B1 (de) * | 1993-10-21 | 1998-04-22 | Asea Brown Boveri Ag | Rost für eine Feuerungsanlage |
| NO312644B1 (no) * | 1997-04-23 | 2002-06-10 | Doikos Investments Ltd | Vannkjölt trykkforbrenningsrist |
| JP3871484B2 (ja) * | 1999-12-21 | 2007-01-24 | 株式会社荏原製作所 | ストーカ式燃焼装置 |
| US20100122643A1 (en) * | 2008-11-20 | 2010-05-20 | Cole Arthur W | Modular grate block for a refuse incinerator |
| KR101935814B1 (ko) * | 2017-01-18 | 2019-01-07 | 주식회사 진화메탈 | 사이드월 화격자 및 그 설치구조 |
-
2022
- 2022-10-26 EP EP22203864.8A patent/EP4361500A1/de not_active Withdrawn
-
2023
- 2023-10-23 CN CN202380075230.1A patent/CN120112754A/zh active Pending
- 2023-10-23 EP EP23793392.4A patent/EP4609120A1/de active Pending
- 2023-10-23 WO PCT/EP2023/079457 patent/WO2024088955A1/de not_active Ceased
- 2023-10-23 JP JP2025524234A patent/JP2025534833A/ja active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0004072A2 (de) * | 1978-03-07 | 1979-09-19 | Josef Martin Feuerungsbau GmbH | Rostbelag, insbesondere für Grossfeuerungen |
| DE69105120T2 (de) | 1990-04-23 | 1995-05-11 | Tiru Traite Ind Residus Urbain | Balken, der eine Dehnungsfuge zwischen nebeneinanderliegenden Zonen eines Rostes bildet, dessen Stäbe abwechselnd fest und beweglich sind. |
| WO2018149516A1 (de) | 2017-02-17 | 2018-08-23 | Mitsubishi Hitachi Power Systems Europe Gmbh | Vorschubrost mit rostbahntrennungselementen |
| KR20200013957A (ko) * | 2018-07-31 | 2020-02-10 | (주)이에스 | 고형연료 소각로 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4361500A1 (de) | 2024-05-01 |
| CN120112754A (zh) | 2025-06-06 |
| EP4609120A1 (de) | 2025-09-03 |
| JP2025534833A (ja) | 2025-10-17 |
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